Materiały źródłowe

• #1 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #2 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #3 Delirium: Definition, Causes, and What It Feels Like

  https://www.verywellhealth.com/delirium-5223127

  Delirium is a sudden change in how a person thinks, making them feel confused or disoriented. […] Delirium causes sudden confusion and trouble thinking clearly. A person may have trouble paying attention, feel disoriented, or even see or hear things that aren’t really there (hallucinations). […] The most common symptoms of delirium include: Sudden confusion that starts within hours or days, Trouble focusing, listening, or understanding information, Seeming uninterested in what’s happening around them, almost „zoned out,” Difficulty thinking clearly or remembering things, Feeling very sleepy or lacking energy (lethargy), Not knowing where they are or what time it is (disorientation), Being extra sensitive to bright lights or loud noises, Senses feeling „off,” like sounds or sights seeming strange (distorted perception), Hallucinations, such as feeling bugs on their skin or thinking objects are moving when they aren’t, Strongly believing things that aren’t true (delusions), like thinking doctors or family members are trying to harm them, Sudden mood changes, such as feeling extremely happy (euphoria), very nervous (anxiety), or restless and upset (agitation).

• #4 Delirium vs. Dementia | A Place for Mom

  https://www.aplaceformom.com/caregiver-resources/articles/delirium-vs-dementia

  Delirium is a mental state of impaired attention, thinking ability, and alertness. Delirium is not a disease in and of itself. It is a term used to describe mental confusion resulting from different conditions. […] Delirium symptoms typically: Begin suddenly and develop quickly […] Are temporary and reversible […] Cause difficulty with attention […] Delirium symptoms can include: Confusion […] Trouble with concentration. […] Delirium symptoms usually indicate a serious problem that requires immediate medical attention, especially in older adults. Luckily, delirium is usually temporary and reversible. Once the cause of delirium is treated, most symptoms typically go away. […] Yes, because the physical brain changes related to dementia puts one at a higher risk for experiencing delirium. People with dementia can experience episodes of delirium, and it may even seem like they are experiencing a period of rapidly progressing dementia.

• #5 Confusion: Definition, Causes, Symptoms & Prevention

  https://my.clevelandclinic.org/health/symptoms/25206-confusion

  Sudden-onset confusion is always a sign that someone needs medical attention. […] Delirium is a specific, more severe type of confusion. It can develop when injury, illness or other factors overwhelm your brains ability to keep working like it should. The disruptions in brain activity are so severe, they can cause or worsen dementia in people at risk because of age or other factors. Delirium develops quickly and it can shift and change from hour to hour. […] If you recognize or suspect a loved one has confusion especially when it begins or worsens quickly its important to get medical attention immediately.

• #6 Sudden confusion (delirium)

  https://www.nhs.uk/conditions/confusion/

  Sudden confusion (delirium) can have many different causes. Get medical help immediately if someone suddenly becomes confused (delirious). […] If a person is confused, they may: not be able to think or speak clearly or quickly, not know where they are (feel disorientated), struggle to pay attention or remember things, see or hear things that are not there (hallucinations). […] Immediate action required: Go to AE or call 999 if: someone suddenly becomes confused. Many causes of sudden confusion need to be assessed and treated as soon as possible. Sometimes it may be life threatening. […] Sudden confusion can be caused by many different things. Do not try to self-diagnose. Get medical help if someone suddenly becomes confused or delirious. Some of the most common causes of sudden confusion include: an infection urinary tract infections (UTIs) are a common cause in older people or people with dementia, a stroke or TIA („mini-stroke”), a low blood sugar level in people with diabetes, a head injury, some types of prescription medicine, alcohol poisoning or alcohol withdrawal, taking drugs, carbon monoxide poisoning especially if other people you live with also become unwell, a severe asthma attack or other problems with the lungs or heart, certain types of seizures caused by epilepsy.

• #7 Sudden confusion (delirium) | nidirect

  https://www.nidirect.gov.uk/conditions/sudden-confusion-delirium

  Sudden confusion (delirium) describes a state of sudden confusion and changes in a persons behaviour and alertness. If the confusion has come on suddenly, you should take the person to your nearest hospital or call 999 for an ambulance. […] The symptoms are often worse at night, meaning that a person is awake at night and sleepy during the day. […] A person with a delirium can show symptoms including: confusion, distractibility, rambling speech, changes in alertness, agitation (sometimes leading to aggression), behavioural changes, changes in personality, including paranoia, hallucinations. […] The most common causes of sudden confusion include: a lack of oxygen in the blood (hypoxia) the cause could be anything from a severe asthma attack to a problem with the lungs or heart, an infection anywhere in the body, especially in elderly people, a stroke or TIA (mini stroke), a low blood sugar level (hypoglycaemia), diabetic ketoacidosis, a serious complication of diabetes caused by a lack of insulin in the body, certain medications, including digoxin, diuretics, steroids, and opiates, alcohol poisoning or alcohol withdrawal, drug misuse.

• #8 Delirium Symptoms | American Geriatrics Society | HealthInAging.org

  https://www.healthinaging.org/a-z-topic/delirium/symptoms

  Delirium has many symptoms that can change quickly. Delirium can come and go within 24 hours. And people with delirium often can be lucid (clear-headed) during this time. […] A person may have delirium if they have: Difficulty concentrating, Changes in behavior, personality, mood, or attention, Changes in awareness (for example, being either super alert or drowsy), Any change in function, such as sleeping more or eating less. […] Sudden onset over hours to days, Slurred speech and language difficulties, talking that doesn’t make sense, Changes in feeling (sensation) and perception, Easily distracted, decreased attention, concentration, and awareness of what is nearby, Usually more alert in the morning than at night; in and out of consciousness, Changes in movement (for example, people may become slow moving or very restless), Changes in sleep patterns, Confusion and disorientation, not aware of correct time or place, Memory loss, including worse short-term memory, Disorganized thinking, Emotional or personality changes, with frequent changes in moods, Incontinence (unable to control urine or bowel movements), Hallucinations (visual, but not auditory), Signs of medical illness (such as fever, chills, pain, etc.) or medication side effects.

• #9 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Severe confusion that develops quickly, and often fluctuates in intensity. […] Delirium presents with disturbances in attention, awareness, and higher-order cognition. […] People with delirium may experience other neuropsychiatric disturbances including changes in psychomotor activity, disrupted sleep-wake cycle, emotional disturbances, disturbances of consciousness, or altered state of consciousness, as well as perceptual disturbances. […] Delirium may be difficult to diagnose without first establishing a person’s usual mental function or 'cognitive baseline’. […] Delirium may occur in persons with existing mental illness, baseline intellectual disability, or dementia, entirely unrelated to any of these conditions. […] Delirium is often confused with schizophrenia, psychosis, organic brain syndromes, and more, because of similar signs and symptoms of these disorders.

• #10 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #11 Patient education: Delirium (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/delirium-beyond-the-basics/print

  Delirium is a sudden and severe change in brain function that causes a person to appear confused or disoriented, or to have difficulties maintaining focus, thinking clearly, and remembering recent events, typically with a fluctuating course. […] Delirium is not a disease, but rather a group of symptoms. The key features include: […] There are abnormal changes in the person’s level of consciousness and thinking. The person may be sleepy or appear to be withdrawn and depressed (hypoactive delirium), or they may be agitated (hyperactive delirium). Some patients alternate between these states. The changes may be subtle initially. The mental status and level of consciousness commonly fluctuate throughout the day. […] These changes develop over a short period of time (hours to days) and tend to become intermittently worse, especially in the afternoon and evening. This sudden change helps to differentiate delirium from dementia, which worsens slowly over months to years.

• #12 Delirium | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/brain-nerves-and-spinal-cord/delirium/

  Delirium (acute confusional state) is when someones mental function has a sudden change. It comes on quickly, often over hours or days. […] As well as showing confusion, people with delirium can be sleepy, agitated, have altered beliefs or see hallucinations. […] People with delirium may experience symptoms that include: being confused (or more confused than normal), being sleepy and less responsive, being very agitated or restless, a change in sleeping pattern (like being awake at night and sleeping during the day), suspiciousness or a loss of trust, seeing or hearing things that arent real. […] Sometimes these symptoms are worse in the evenings or overnight. […] Most delirium lasts a few days but in some cases it can persist for weeks or even months. […] Delirium can continue even when all triggers have been addressed. In this situation, you should get ongoing supportive care and help. In other cases, the delirium will slowly improve. […] Unfortunately, not all patients recover to the same mental function they had before their delirium.

• #13 Delirium vs. dementia: Symptoms and more

  https://www.medicalnewstoday.com/articles/delirium-vs-dementia

  Delirium is a disturbance in a persons thoughts, mood, and behavior. It causes inattention, distractibility, disorganized thinking, and confusion. A person may have reduced awareness of their environment and may experience hallucinations or delusions. […] Symptoms of delirium often develop within hours or days. They tend to fluctuate throughout the day, and a person may have periods without symptoms. […] Common signs and symptoms include: inattention, or difficulty focusing, shifting, or maintaining attention; disorientation, or not knowing who and where they are, or what time it is; slurred, incoherent, or rambling speech; emotional changes, including anxiety, irritability, anger, depression, and fear; sudden mood shifts; restlessness, agitation, or aggression; perceptual distortions, such as hallucinations or delusions; being quiet, withdrawn, drowsy, or lethargic; disturbed sleeping and eating habits; personality changes.

• #14 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Delirium is characterized primarily by difficulty focusing, maintaining, or shifting attention (inattention). […] Consciousness level fluctuates; patients are disoriented to time and sometimes place or person. They may have hallucinations, delusions, and paranoia. Confusion regarding day-to-day events and daily routines is common, as are changes in personality and affect. Thinking becomes disorganized, and speech is often disordered, with prominent slurring, rapidity, neologisms, aphasic errors, or chaotic patterns. […] Symptoms fluctuate over minutes to hours; they may lessen during the day and worsen at night. […] Other symptoms of delirium may include inappropriate behavior and fearfulness. Patients may become irritable, agitated, hyperactive, and hyperalert; conversely, they may become quiet, withdrawn, and lethargic.

• #15 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Sudden and acute onset and fluctuating course are the central features of delirium. […] According to the current DSM criteria (APA, 2000), delirium is characterized by the rapid onset of symptoms that tend to fluctuate even during the same day with an altered level of consciousness, global disturbance of cognition or perceptual abnormalities and evidence of a physical cause, substance intoxication/withdrawal, or multiple etiologies. […] In delirium, the disturbance of consciousness is one of the earliest manifestations, which often fluctuates, mainly in the evening when environmental stimulation is at its lowest. […] The level of consciousness may fluctuate between extremes in the same patient, or alternatively may present with more subtle signs, such as mild drowsiness, or an impaired level of attention.

• #16 Confusion and Delirium | Cancer-related Side Effects | American Cancer Society

  https://www.cancer.org/cancer/managing-cancer/side-effects/changes-in-mood-or-thinking/confusion.html

  Confusion and delirium affect how a person thinks and behaves. When someone is confused or delirious, they can’t think clearly and might not behave like they usually do. It most often goes away, but can be a sign that something serious is wrong. […] The first symptom of confusion or delirium is often a sudden change in how alert a person is. They might become very sleepy and out of touch with whats going on around them. Or they might start to act very upset and nervous. Most often, the person will not be aware of these changes, but their family members or cancer care team will notice them. […] Delirium may cause hallucinations. People may see, hear, smell, or feel things that others cannot. But the hallucinations feel real to the person with delirium. People with delirium may also have delusions, believing things that are not based in reality. For instance, they might believe that someone is trying to harm them when that person is only trying to help.

• #17 Delirium (sudden confusion) – Dementia UK

  https://www.dementiauk.org/information-and-support/health-advice/delirium/

  Delirium is common in people with dementia and can make them increasingly confused and distressed. Here, we explain the signs to be aware of and how you can help. […] Delirium is a state of mental confusion that comes on suddenly. It can have a big impact on the way a person behaves and functions, especially if they have dementia. […] People with delirium typically become confused and/or disorientated, and have difficulty concentrating. […] Symptoms of delirium include: a sudden change in mental state and/or behaviour, disorientation: being unsure where they are or what day/time it is, paranoia and false beliefs, such as thinking someone is trying to harm them, poor concentration, memory loss, drowsiness, feeling agitated and restless, irritability or aggression, hallucinations, difficulty speaking clearly and following conversations, vivid dreams, physical changes, for example in appetite or mobility, falls.

• #18 Delirium – Definition, Symptoms, and Causes

  https://www.mentalhealth.com/library/delirium

  Delirium is the acute onset and temporary disturbances to a person’s consciousness, attention and awareness, often resulting in a debilitating state of sudden confusion. […] The onset of delirium occurs suddenly, meaning that the changes in a person’s physical and mental status can develop over hours or a few days. […] Depending on the type of delirium, a person experiencing an episode can present with psychotic features such as hallucinations, physical signs of stress like pacing, and behavioral changes such as aggressiveness. […] The severity of symptoms may fluctuate throughout the day and worsen in the evening (termed sundowning). […] A person with delirium can have significantly diminished awareness, attention and responsiveness to their environment. […] Patients with delirium can display uncharacteristically extreme mood and emotional states – particularly in response to delusions or hallucinations. […] In addition to these symptoms, people with delirium may also experience physical impairments such as dizziness, loss of coordination, falling down, and lightheadedness.

• #19 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Delirium-Symptoms.aspx

  Delirium is a sudden state of severe mental confusion that can occur as a result of illness, surgery or the use of some medications. […] Delirium usually starts suddenly and can be frightening for the person experiencing it as well as for those around them. […] Several subtypes of delirium exist and these include the hypoactive subtype, which is characterized by a quiet confusion and apathy that may be easily overlooked or confused with depression; the hyperactive subtype, which presents with prominent disorientation, agitation and delusion, but may be confused with schizophrenia and the mixed subtype, where patients fluctuate between the hypoactive and hyperactive subtypes. […] Some common features of delirium, however, such as drowsiness, confusion, and disorientation do not provide obvious clues as to the cause of the condition.

• #20 Delirium: Types, Causes, and Treatment

  https://www.healthline.com/health/delirium

  Delirium is a sudden change in your alertness and thinking. People with delirium typically become confused and have trouble paying attention. […] Symptoms of delirium generally appear quickly over a period of hours or days. The symptoms tend to fluctuate, meaning they are more severe at some times, and less severe at others. […] You might have a hard time concentrating or feel confused about what’s happening around you. You may also move more slowly or quickly than usual, and experience mood swings. […] Other symptoms may include: not thinking clearly, having trouble speaking clearly or participating in a conversation, being easily distracted, losing track of what time it is and where you are (disorientation), sleeping poorly or feeling drowsy, sudden changes in your ability to carry out everyday activities, like eating or walking, difficulty remembering recent events, becoming agitated or paranoid.

• #21 What Causes Sudden Confusion in the Elderly?

  https://assistinghands.com/98/ohio/westlake/blog/elder-sudden-confusion/

  Sudden confusion is a serious condition that demands immediate medical care. Also known as delirium, sudden confusion causes changes in an older adults behavior and alertness. A senior can become disoriented and unaware of the time of day, their location or even their identity. They may be unable to speak or think clearly. Affected individuals may even see things that are not there (hallucinations). When these symptoms occur, it is known as sudden confusion. […] Symptoms of delirium manifest in several ways. Oftentimes, the condition worsens at night, which means the senior is awake instead of experiencing a quality nights sleep; being unable to rest at night can be an issue, as it leads to the person feeling sleepy during the day. […] Confusion, which is when the senior is unable to focus their attention, is a symptom of delirium. The older person may be easily distracted or experience noticeable changes in alertness. An individual who has sudden confusion is unable to recognize people they know.

• #22 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #23 Sudden confusion (delirium) | nidirect

  https://www.nidirect.gov.uk/conditions/sudden-confusion-delirium

  Sudden confusion (delirium) describes a state of sudden confusion and changes in a persons behaviour and alertness. If the confusion has come on suddenly, you should take the person to your nearest hospital or call 999 for an ambulance. […] The symptoms are often worse at night, meaning that a person is awake at night and sleepy during the day. […] A person with a delirium can show symptoms including: confusion, distractibility, rambling speech, changes in alertness, agitation (sometimes leading to aggression), behavioural changes, changes in personality, including paranoia, hallucinations. […] The most common causes of sudden confusion include: a lack of oxygen in the blood (hypoxia) the cause could be anything from a severe asthma attack to a problem with the lungs or heart, an infection anywhere in the body, especially in elderly people, a stroke or TIA (mini stroke), a low blood sugar level (hypoglycaemia), diabetic ketoacidosis, a serious complication of diabetes caused by a lack of insulin in the body, certain medications, including digoxin, diuretics, steroids, and opiates, alcohol poisoning or alcohol withdrawal, drug misuse.

• #24 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #25 Delirium – Definition, Symptoms, and Causes

  https://www.mentalhealth.com/library/delirium

  Delirium is the acute onset and temporary disturbances to a person’s consciousness, attention and awareness, often resulting in a debilitating state of sudden confusion. […] The onset of delirium occurs suddenly, meaning that the changes in a person’s physical and mental status can develop over hours or a few days. […] Depending on the type of delirium, a person experiencing an episode can present with psychotic features such as hallucinations, physical signs of stress like pacing, and behavioral changes such as aggressiveness. […] The severity of symptoms may fluctuate throughout the day and worsen in the evening (termed sundowning). […] A person with delirium can have significantly diminished awareness, attention and responsiveness to their environment. […] Patients with delirium can display uncharacteristically extreme mood and emotional states – particularly in response to delusions or hallucinations. […] In addition to these symptoms, people with delirium may also experience physical impairments such as dizziness, loss of coordination, falling down, and lightheadedness.

• #26 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Delirium arises through the interaction of a number of predisposing and precipitating factors. […] Individuals with multiple and/or significant predisposing factors are at high risk for an episode of delirium with a single and/or mild precipitating factor. […] Delirium exists across a range of arousal levels, either as a state between normal wakefulness/alertness and coma or as a state of heightened psychophysiological arousal. […] Delirium has been commonly classified into psychomotor subtypes of hypoactive, hyperactive, and mixed level of activity. […] Hyperactive symptoms include hyper-vigilance, restlessness, fast or loud speech, irritability, combativeness, impatience, swearing, singing, laughing, uncooperativeness, euphoria, anger, wandering, easy startling, fast motor responses, distractibility, tangentiality, nightmares, and persistent thoughts.

• #27 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Delirium-Symptoms.aspx

  Delirium is a sudden state of severe mental confusion that can occur as a result of illness, surgery or the use of some medications. […] Delirium usually starts suddenly and can be frightening for the person experiencing it as well as for those around them. […] Several subtypes of delirium exist and these include the hypoactive subtype, which is characterized by a quiet confusion and apathy that may be easily overlooked or confused with depression; the hyperactive subtype, which presents with prominent disorientation, agitation and delusion, but may be confused with schizophrenia and the mixed subtype, where patients fluctuate between the hypoactive and hyperactive subtypes. […] Some common features of delirium, however, such as drowsiness, confusion, and disorientation do not provide obvious clues as to the cause of the condition.

• #28 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #29 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Delirium arises through the interaction of a number of predisposing and precipitating factors. […] Individuals with multiple and/or significant predisposing factors are at high risk for an episode of delirium with a single and/or mild precipitating factor. […] Delirium exists across a range of arousal levels, either as a state between normal wakefulness/alertness and coma or as a state of heightened psychophysiological arousal. […] Delirium has been commonly classified into psychomotor subtypes of hypoactive, hyperactive, and mixed level of activity. […] Hyperactive symptoms include hyper-vigilance, restlessness, fast or loud speech, irritability, combativeness, impatience, swearing, singing, laughing, uncooperativeness, euphoria, anger, wandering, easy startling, fast motor responses, distractibility, tangentiality, nightmares, and persistent thoughts.

• #30 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium is defined as a transient, usually reversible, cause of mental dysfunction and manifests clinically with a wide range of neuropsychiatric abnormalities. It can occur at any age, but it occurs more commonly in patients who are elderly and have a previously compromised mental status. […] The clinical hallmarks of delirium are decreased attention or awareness and a change in baseline cognition. Delirium often manifests as a waxing and waning type of confusion. Symptoms include the following: Clouding of consciousness, Difficulty maintaining or shifting attention, Disorientation, Illusions, Hallucinations, Fluctuating levels of consciousness, Dysphasia, Dysarthria, Tremor, Asterixis in hepatic encephalopathy and uremia, Motor abnormalities. […] The disturbance develops over a short period (usually hours to days) and tends to fluctuate during the course of the day.

• #31 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Delirium arises through the interaction of a number of predisposing and precipitating factors. […] Individuals with multiple and/or significant predisposing factors are at high risk for an episode of delirium with a single and/or mild precipitating factor. […] Delirium exists across a range of arousal levels, either as a state between normal wakefulness/alertness and coma or as a state of heightened psychophysiological arousal. […] Delirium has been commonly classified into psychomotor subtypes of hypoactive, hyperactive, and mixed level of activity. […] Hyperactive symptoms include hyper-vigilance, restlessness, fast or loud speech, irritability, combativeness, impatience, swearing, singing, laughing, uncooperativeness, euphoria, anger, wandering, easy startling, fast motor responses, distractibility, tangentiality, nightmares, and persistent thoughts.

• #32 Delirium (sudden confusion) – Dementia UK

  https://www.dementiauk.org/information-and-support/health-advice/delirium/

  Delirium is common in people with dementia and can make them increasingly confused and distressed. Here, we explain the signs to be aware of and how you can help. […] Delirium is a state of mental confusion that comes on suddenly. It can have a big impact on the way a person behaves and functions, especially if they have dementia. […] People with delirium typically become confused and/or disorientated, and have difficulty concentrating. […] Symptoms of delirium include: a sudden change in mental state and/or behaviour, disorientation: being unsure where they are or what day/time it is, paranoia and false beliefs, such as thinking someone is trying to harm them, poor concentration, memory loss, drowsiness, feeling agitated and restless, irritability or aggression, hallucinations, difficulty speaking clearly and following conversations, vivid dreams, physical changes, for example in appetite or mobility, falls.

• #33 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Delirium arises through the interaction of a number of predisposing and precipitating factors. […] Individuals with multiple and/or significant predisposing factors are at high risk for an episode of delirium with a single and/or mild precipitating factor. […] Delirium exists across a range of arousal levels, either as a state between normal wakefulness/alertness and coma or as a state of heightened psychophysiological arousal. […] Delirium has been commonly classified into psychomotor subtypes of hypoactive, hyperactive, and mixed level of activity. […] Hyperactive symptoms include hyper-vigilance, restlessness, fast or loud speech, irritability, combativeness, impatience, swearing, singing, laughing, uncooperativeness, euphoria, anger, wandering, easy startling, fast motor responses, distractibility, tangentiality, nightmares, and persistent thoughts.

• #34 What is Delirium? Common causes, symptoms and treatment

  https://www.agespace.org/health/delirium

  Hyperactive delirium is easier to identify, as the person tends to be more restless and aggressive, therein drawing attention to their condition. […] Hypoactive delirium can be more difficult to identify, but is more common. People tend to become more withdrawn, and therefore not draw attention to their condition. […] Delirium is most common in people who are in hospital, or have recently left hospital. Delirium is also more common in people who already have problems with their memory, including those with dementia. […] If somebody is showing symptoms of delirium, you should urgently seek professional medical help. It can be a symptom of very serious illnesses, which can potentially be fatal. […] The primary way of treating delirium is by addressing the underlying physical cause of the delirium.

• #35 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #36 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #37 Delirium (sudden confusion) – Dementia UK

  https://www.dementiauk.org/information-and-support/health-advice/delirium/

  Delirium is common in people with dementia and can make them increasingly confused and distressed. Here, we explain the signs to be aware of and how you can help. […] Delirium is a state of mental confusion that comes on suddenly. It can have a big impact on the way a person behaves and functions, especially if they have dementia. […] People with delirium typically become confused and/or disorientated, and have difficulty concentrating. […] Symptoms of delirium include: a sudden change in mental state and/or behaviour, disorientation: being unsure where they are or what day/time it is, paranoia and false beliefs, such as thinking someone is trying to harm them, poor concentration, memory loss, drowsiness, feeling agitated and restless, irritability or aggression, hallucinations, difficulty speaking clearly and following conversations, vivid dreams, physical changes, for example in appetite or mobility, falls.

• #38 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #39 Patient education: Delirium (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/delirium-beyond-the-basics/print

  Delirium is a sudden and severe change in brain function that causes a person to appear confused or disoriented, or to have difficulties maintaining focus, thinking clearly, and remembering recent events, typically with a fluctuating course. […] Delirium is not a disease, but rather a group of symptoms. The key features include: […] There are abnormal changes in the person’s level of consciousness and thinking. The person may be sleepy or appear to be withdrawn and depressed (hypoactive delirium), or they may be agitated (hyperactive delirium). Some patients alternate between these states. The changes may be subtle initially. The mental status and level of consciousness commonly fluctuate throughout the day. […] These changes develop over a short period of time (hours to days) and tend to become intermittently worse, especially in the afternoon and evening. This sudden change helps to differentiate delirium from dementia, which worsens slowly over months to years.

• #40 Delirium | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/brain-nerves-and-spinal-cord/delirium/

  Delirium (acute confusional state) is when someones mental function has a sudden change. It comes on quickly, often over hours or days. […] As well as showing confusion, people with delirium can be sleepy, agitated, have altered beliefs or see hallucinations. […] People with delirium may experience symptoms that include: being confused (or more confused than normal), being sleepy and less responsive, being very agitated or restless, a change in sleeping pattern (like being awake at night and sleeping during the day), suspiciousness or a loss of trust, seeing or hearing things that arent real. […] Sometimes these symptoms are worse in the evenings or overnight. […] Most delirium lasts a few days but in some cases it can persist for weeks or even months. […] Delirium can continue even when all triggers have been addressed. In this situation, you should get ongoing supportive care and help. In other cases, the delirium will slowly improve. […] Unfortunately, not all patients recover to the same mental function they had before their delirium.

• #41 What is Delirium? Common causes, symptoms and treatment

  https://www.agespace.org/health/delirium

  Hyperactive delirium is easier to identify, as the person tends to be more restless and aggressive, therein drawing attention to their condition. […] Hypoactive delirium can be more difficult to identify, but is more common. People tend to become more withdrawn, and therefore not draw attention to their condition. […] Delirium is most common in people who are in hospital, or have recently left hospital. Delirium is also more common in people who already have problems with their memory, including those with dementia. […] If somebody is showing symptoms of delirium, you should urgently seek professional medical help. It can be a symptom of very serious illnesses, which can potentially be fatal. […] The primary way of treating delirium is by addressing the underlying physical cause of the delirium.

• #42 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #43 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #44 Confusion (delirium in the elderly)

  https://emed.ie/Symptoms/Confusion.php

  Delirium is avoidable and treatable not an accepted factor in ageing!! […] Symptoms of delirium persist in about 1/3 of patients with a worse prognosis […] Disturbance of consciousness – reduced ability to focus […] Changed cognition or development of perceptual disturbance inc. hallucinations […] Disturbance of sleep-wake cycle […] Fluctuations over the course of the day […] Hyperactive: Heightened arousal […] Hypoactive: Listless / Sleepy […] Mixed: Commonest […] Memory for recent events since delirium began distorted […] Delirium Risk Factors: Age 65 […] Severe illness / Multiple disease […] Dementia […] Infection/dehydration […] Delirium Precipitants: LRTI/ UTI / Catheter […] Dehydration, Hypokalaemia […] Stroke, Epilepsy, SDH […] Hypoxia […] Sleep deprivation […] Urgent treatment: Immediate while identifying and correcting underlying causes

• #45 Recognising delirium – University Hospitals Sussex NHS Foundation Trust

  https://www.uhsussex.nhs.uk/resources/recognising-delirium/

  Delirium is a state of mental confusion. Delirium can start very suddenly, sometimes in just a few hours. There are three types of delirium: hyperactive delirium, hypoactive delirium, and mixed delirium. The symptoms of someone with hyperactive delirium include: Confusion: not being sure where they are, or why they are there, perhaps not being able to remember instructions or names […] The symptoms of someone with hypoactive delirium include: Not being able to focus: difficulty following a conversation, or being easily distracted […] Mixed delirium means that someone can switch between symptoms of hyperactive delirium and hypoactive delirium, sometimes over the course of a day. If someone with dementia has delirium, there will be a sudden, noticeable change in their usual behaviour. Someone who has dementia and delirium may do things that are out of character: for example, they may not usually be aggressive, but suddenly start behaving aggressively if they have delirium. Sometimes, in older people, the effects of delirium can last a bit longer even after the cause is treated, even weeks or months. The earlier that delirium is identified and treated, the better the outcome for that person. Have these changes come on suddenly, over hours or days?

• #46 Delirium: Symptoms, Causes,Treatment and Types | Metropolis Healthcare

  https://www.metropolisindia.com/blog/preventive-healthcare/understanding-delirium-when-your-mind-suddenly-gets-confused

  It is important to note that people with delirium can transition from one type to another during their illness. […] The outcome of delirium life expectancy depends on what causes it, how quickly it is diagnosed, and how well you have adapted to the mode of delirium therapy. If you get help quickly and receive the right treatment, you are likely to make a full recovery from delirium. But if left untreated, you can develop complications, so it’s important to detect and treat it early.

• #47 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is a change in a persons mental state that happens suddenly over 1-2 days. […] The most important part of identifying delirium is noticing a sudden change in a persons mental state that theyre not themselves. […] A person with delirium may: be less alert and not respond to things happening around them, be easily distracted, be less aware of where they are, or what time it is (disorientation), suddenly be less able to do something (for example, walking or eating), speak less clearly or struggle to follow a conversation, have sudden swings in mood or behaviour, have hallucinations see or hear things that arent real, have delusions or become paranoid strongly believing things that are not true. […] Delirium develops suddenly (1-2 days). […] Symptoms can change a lot from hour to hour.

• #48 Temporary Confusion & Disorientation (Delirium): Causes & Treatment

  https://www.webmd.com/brain/sudden-confusion-causes

  Sudden confusion, sometimes called delirium or encephalopathy, can be a sign of many health problems. It comes on quickly, within hours or days. Its different from dementia (like Alzheimers disease), which causes slow changes over months or years. […] Symptoms can vary. Some people become quiet and withdrawn, while others get nervous and upset. They may: […] These symptoms will start suddenly. They may come and go or steadily get worse later in the day. […] Many conditions or health problems can cause sudden confusion, and some are more serious than others: […] Once doctors can get the cause under control, the confusion usually goes away. It can take hours or days to recover, sometimes longer. In the meantime, some people may need medication to keep them calm and help with their confusion.

• #49 Patient education: Delirium (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/delirium-beyond-the-basics/print

  Delirium is a sudden and severe change in brain function that causes a person to appear confused or disoriented, or to have difficulties maintaining focus, thinking clearly, and remembering recent events, typically with a fluctuating course. […] Delirium is not a disease, but rather a group of symptoms. The key features include: […] There are abnormal changes in the person’s level of consciousness and thinking. The person may be sleepy or appear to be withdrawn and depressed (hypoactive delirium), or they may be agitated (hyperactive delirium). Some patients alternate between these states. The changes may be subtle initially. The mental status and level of consciousness commonly fluctuate throughout the day. […] These changes develop over a short period of time (hours to days) and tend to become intermittently worse, especially in the afternoon and evening. This sudden change helps to differentiate delirium from dementia, which worsens slowly over months to years.

• #50 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium is defined as a transient, usually reversible, cause of mental dysfunction and manifests clinically with a wide range of neuropsychiatric abnormalities. It can occur at any age, but it occurs more commonly in patients who are elderly and have a previously compromised mental status. […] The clinical hallmarks of delirium are decreased attention or awareness and a change in baseline cognition. Delirium often manifests as a waxing and waning type of confusion. Symptoms include the following: Clouding of consciousness, Difficulty maintaining or shifting attention, Disorientation, Illusions, Hallucinations, Fluctuating levels of consciousness, Dysphasia, Dysarthria, Tremor, Asterixis in hepatic encephalopathy and uremia, Motor abnormalities. […] The disturbance develops over a short period (usually hours to days) and tends to fluctuate during the course of the day.

• #51 Sudden confusion (delirium)

  https://www.nhs.uk/conditions/confusion/

  Sudden confusion (delirium) can have many different causes. Get medical help immediately if someone suddenly becomes confused (delirious). […] If a person is confused, they may: not be able to think or speak clearly or quickly, not know where they are (feel disorientated), struggle to pay attention or remember things, see or hear things that are not there (hallucinations). […] Immediate action required: Go to AE or call 999 if: someone suddenly becomes confused. Many causes of sudden confusion need to be assessed and treated as soon as possible. Sometimes it may be life threatening. […] Sudden confusion can be caused by many different things. Do not try to self-diagnose. Get medical help if someone suddenly becomes confused or delirious. Some of the most common causes of sudden confusion include: an infection urinary tract infections (UTIs) are a common cause in older people or people with dementia, a stroke or TIA („mini-stroke”), a low blood sugar level in people with diabetes, a head injury, some types of prescription medicine, alcohol poisoning or alcohol withdrawal, taking drugs, carbon monoxide poisoning especially if other people you live with also become unwell, a severe asthma attack or other problems with the lungs or heart, certain types of seizures caused by epilepsy.

• #52 Recognizing, responding to delirium – Mayo Clinic Health System

  https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/recognizing-and-responding-to-delirium

  Any of these signs are signs of delirium that require medical attention. Delirium symptoms can come and go, lasting for a little while or a long while. […] Being hospitalized is a risk factor for delirium. The hospital can be an unfamiliar or scary place for some people, especially loved ones who have memory problems, are older or have existing health problems. For example, a loved one can be hospitalized for a heart attack, but then develop delirium. This increases the risk for other problems while in the hospital, including an infection or a fall, leading to a longer hospital stay. […] If your loved one starts to show signs of delirium, it’s important to alert the health care team.

• #53 Sudden confusion (delirium)

  https://www.nhs.uk/conditions/confusion/

  Sudden confusion (delirium) can have many different causes. Get medical help immediately if someone suddenly becomes confused (delirious). […] If a person is confused, they may: not be able to think or speak clearly or quickly, not know where they are (feel disorientated), struggle to pay attention or remember things, see or hear things that are not there (hallucinations). […] Immediate action required: Go to AE or call 999 if: someone suddenly becomes confused. Many causes of sudden confusion need to be assessed and treated as soon as possible. Sometimes it may be life threatening. […] Sudden confusion can be caused by many different things. Do not try to self-diagnose. Get medical help if someone suddenly becomes confused or delirious. Some of the most common causes of sudden confusion include: an infection urinary tract infections (UTIs) are a common cause in older people or people with dementia, a stroke or TIA („mini-stroke”), a low blood sugar level in people with diabetes, a head injury, some types of prescription medicine, alcohol poisoning or alcohol withdrawal, taking drugs, carbon monoxide poisoning especially if other people you live with also become unwell, a severe asthma attack or other problems with the lungs or heart, certain types of seizures caused by epilepsy.

• #54 Sudden confusion (delirium) | nidirect

  https://www.nidirect.gov.uk/conditions/sudden-confusion-delirium

  Less common causes of sudden confusion include: an infection of the brain or its lining (encephalitis or meningitis), an imbalance of salts and minerals in the blood, a severely underactive thyroid gland, thiamine (vitamin B1) deficiency, a brain tumour, hypoparathyroidism or hyperparathyroidism (rare hormone disorders), Cushing’s disease (a tumour of the pituitary gland), an epileptic seizure, carbon monoxide poisoning.

• #55 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium usually begins suddenly and progresses over hours or days. The hallmark of delirium is an inability to pay attention. People with delirium cannot concentrate, so they have trouble processing new information and cannot recall recent events. Thus, they do not understand what is happening around them. They become disoriented. Sudden confusion about time and often about place (where they are) may be an early sign of delirium. If delirium is severe, people may not know who they or other people are. Thinking is confused, and people with delirium ramble, sometimes becoming incoherent. Their level of awareness (consciousness) may fluctuate. That is, people may be overly alert one moment and drowsy and sluggish the next. Other symptoms also often change within minutes and tend to worsen during the evening (a phenomenon called sundowning). Delirium can last hours, days, or even longer, depending on the severity and the cause. If the cause of delirium is not quickly identified and treated, people may become increasingly drowsy and unresponsive, requiring vigorous stimulation to be aroused (a condition called stupor). Stupor may lead to coma or death.

• #56 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #57 Delirium: Causes, Symptoms, Diagnosis and Treatment | Nationwide Children’s Hospital

  https://www.nationwidechildrens.org/conditions/delirium

  Delirium is a serious condition that causes confusion, reduced awareness of your surroundings and changes in behavior. It involves changes in behavior, confused thinking, and reduced awareness of a person’s surroundings. Signs and symptoms of delirium can start suddenly over a few hours or more gradually over a few days. They often come and go throughout the day. The symptoms may get better or worse. Symptoms can last for hours or weeks. Symptoms for children tend to be worse beginning in the late afternoon through the nighttime. Often delirium interferes with sleep. Primary signs of delirium include: Reduced or Changed Awareness of Their Surroundings, Poor Thinking Skills (Cognitive Impairment), Changes in Behavior, Emotional Disturbances. Delirium is usually a temporary condition. It is reversible when the underlying condition has been treated. […] If you see any of the signs of delirium, talk to your child. Any child with disordered thinking or behavior should receive immediate medical and psychological evaluation.

• #58 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #59 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium is defined as a transient, usually reversible, cause of mental dysfunction and manifests clinically with a wide range of neuropsychiatric abnormalities. It can occur at any age, but it occurs more commonly in patients who are elderly and have a previously compromised mental status. […] The clinical hallmarks of delirium are decreased attention or awareness and a change in baseline cognition. Delirium often manifests as a waxing and waning type of confusion. Symptoms include the following: Clouding of consciousness, Difficulty maintaining or shifting attention, Disorientation, Illusions, Hallucinations, Fluctuating levels of consciousness, Dysphasia, Dysarthria, Tremor, Asterixis in hepatic encephalopathy and uremia, Motor abnormalities. […] The disturbance develops over a short period (usually hours to days) and tends to fluctuate during the course of the day.

• #60 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Sudden and acute onset and fluctuating course are the central features of delirium. […] According to the current DSM criteria (APA, 2000), delirium is characterized by the rapid onset of symptoms that tend to fluctuate even during the same day with an altered level of consciousness, global disturbance of cognition or perceptual abnormalities and evidence of a physical cause, substance intoxication/withdrawal, or multiple etiologies. […] In delirium, the disturbance of consciousness is one of the earliest manifestations, which often fluctuates, mainly in the evening when environmental stimulation is at its lowest. […] The level of consciousness may fluctuate between extremes in the same patient, or alternatively may present with more subtle signs, such as mild drowsiness, or an impaired level of attention.

• #61 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #62 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #63 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #64 Delirium: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/000740.htm

  Delirium is sudden severe confusion due to rapid changes in brain function that can occur with physical or mental illness. […] Delirium involves a quick change between mental states (for example, from lethargy to agitation and back to lethargy). […] Symptoms include: Changes in alertness (usually more alert in the morning, less alert at night), Changes in feeling (sensation) and perception, Changes in level of consciousness or awareness, Changes in movement (for example, may be slow moving or hyperactive), Changes in sleep patterns, drowsiness, Confusion (disorientation) about time or place, Decrease in short-term memory and recall, Disorganized thinking, such as talking in a way that doesn’t make sense, Emotional or personality changes, such as anger, agitation, depression, irritability, and overly happy, Incontinence, Movements triggered by changes in the nervous system, Problem concentrating. […] Delirium often lasts about 1 week. It may take several weeks for mental function to return to normal. Full recovery is usually expected, but depends on the underlying cause of the delirium.

• #65 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #66 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #67 Delirium – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK470399/

  Delirium is a clinical syndrome that usually develops in the elderly. It is characterized by an alteration of attention, consciousness, and cognition, with a reduced ability to focus, sustain or shift attention. It develops over a short period and fluctuates during the day. The clinical presentation can vary, usually with psychomotor behavioral disturbances such as hyperactivity or hypoactivity and impairment in sleep duration and architecture. […] The diagnosis is often missed, especially the hypoactive type, due to its subtle clinical manifestation. Delirium is dangerous, often preventable, and associated with a significant cost burden and increased morbidity and mortality. […] The nature of delirium is transient but can persist in patients with predisposing factors. A systematic review showed that hospital delirium persisted until discharge in 45% of cases and persisted one month later in 33% of cases.

• #68 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #69 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #70 Delirium (sudden confusion) – Dementia UK

  https://www.dementiauk.org/information-and-support/health-advice/delirium/

  Dementia can make people more likely to experience delirium. People who are over 80 and live with dementia are at greater risk, particularly during a hospital stay, when up to 50% of people with dementia develop delirium. […] About 60% of people with delirium recover within a week. Some people, however, take longer to recover, and some never get back to exactly how they were before – this is more likely if they have dementia.

• #71 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #72 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #73 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium is more common among older adults. It is a common reason that family members of older adults seek help from a doctor or at a hospital. About 15 to 50% of older adults experience delirium at some time during a hospital stay. […] Delirium tends to last longer in older adults, compared to younger people. Confusion, the most obvious symptom, may be harder to recognize in older adults. Younger people with delirium may be agitated, but very old people tend to become quiet and withdrawn. In such cases, recognizing delirium is even harder.

• #74 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is common, particularly among older people in hospital. […] These health problems make it hard for the brain to work properly. This causes the symptoms of delirium. […] Once this is done, its important to make conditions as ideal as possible for the persons brain to recover. […] For many people the symptoms of delirium usually improve in a few days, once the underlying causes have been treated. […] However, some people dont make a quick or full recovery and may still be having problems with memory and thinking several weeks or even months after becoming unwell. […] Having prolonged and severe delirium over several weeks can increase a persons risk of developing dementia.

• #75 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #76 Delirium – symptoms, diagnosis and treatment | healthdirect

  https://www.healthdirect.gov.au/delirium

  Delirium is a sudden change in the way you think and behave. […] Delirium can cause a range of symptoms, including sudden confusion and changes in behaviour. You may notice that someone with delirium: is confused or forgetful […] These symptoms can start suddenly, over a few hours or days. They can last for a few days or weeks. […] Delirium is often caused by changes in your health, such as a physical illness or infection. It can also result from a change in your prescription medicines. […] Delirium can lead to several complications, including: falling and injuring yourself, pressure sores from being immobile, dehydration and malnutrition due to difficulty eating and drinking.

• #77 Delirium | EBSCO Research Starters

  https://www.ebsco.com/research-starters/health-and-medicine/delirium

  Precipitating circumstances include acute infection, polypharmacy (i.e., several medications that negatively impact psychological health), terminal illness, vascular pathology, unresolved and acute pain, and head injury. […] An individual who is already quite ill is at a much-increased risk of experiencing delirium. […] Though many hospital patients develop this illness during their stay, over 10 percent of patients are actually discharged from the hospital still experiencing delirium. […] The outcomes for delirium are negative and include death, more health interventions (cost and pain), and increased length of stay in the intensive care unit or other hospital unit. […] Nearly half of all cancer patients receiving palliative care have delirium upon admission, while 88 percent of dying cancer patients demonstrate the syndrome.

• #78 Delirium Symptoms | American Geriatrics Society | HealthInAging.org

  https://www.healthinaging.org/a-z-topic/delirium/symptoms

  Delirium has many symptoms that can change quickly. Delirium can come and go within 24 hours. And people with delirium often can be lucid (clear-headed) during this time. […] A person may have delirium if they have: Difficulty concentrating, Changes in behavior, personality, mood, or attention, Changes in awareness (for example, being either super alert or drowsy), Any change in function, such as sleeping more or eating less. […] Sudden onset over hours to days, Slurred speech and language difficulties, talking that doesn’t make sense, Changes in feeling (sensation) and perception, Easily distracted, decreased attention, concentration, and awareness of what is nearby, Usually more alert in the morning than at night; in and out of consciousness, Changes in movement (for example, people may become slow moving or very restless), Changes in sleep patterns, Confusion and disorientation, not aware of correct time or place, Memory loss, including worse short-term memory, Disorganized thinking, Emotional or personality changes, with frequent changes in moods, Incontinence (unable to control urine or bowel movements), Hallucinations (visual, but not auditory), Signs of medical illness (such as fever, chills, pain, etc.) or medication side effects.

• #79 Delirium – symptoms, diagnosis and treatment | healthdirect

  https://www.healthdirect.gov.au/delirium

  Delirium is a sudden change in the way you think and behave. […] Delirium can cause a range of symptoms, including sudden confusion and changes in behaviour. You may notice that someone with delirium: is confused or forgetful […] These symptoms can start suddenly, over a few hours or days. They can last for a few days or weeks. […] Delirium is often caused by changes in your health, such as a physical illness or infection. It can also result from a change in your prescription medicines. […] Delirium can lead to several complications, including: falling and injuring yourself, pressure sores from being immobile, dehydration and malnutrition due to difficulty eating and drinking.

• #80 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Attention is a different function from consciousness, but it is dependent on it. […] In delirium, inattention occurs and it is also considered one of the important cardinal features. […] Typically there are global or multiple deficits in cognition, including memory impairment and disorientation. […] Disorientation is usually common, first in reference to time and then to place. […] The diagnosis of delirium remains primarily clinical, without specific diagnostic tests. […] Taking into account the acute onset and fluctuating course of delirium, it is important to establish the patients level of baseline cognitive functioning and the course of cognitive change. […] Delirium has also been associated with multiple adverse outcomes. […] In intensive care units, delirium has been shown to be associated with prolonged duration of mechanical ventilation, longer stay in hospital, and in the ICU as well as mortality during hospitalization.

• #81 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #82 Delirium – symptoms, diagnosis and treatment | healthdirect

  https://www.healthdirect.gov.au/delirium

  Delirium is a sudden change in the way you think and behave. […] Delirium can cause a range of symptoms, including sudden confusion and changes in behaviour. You may notice that someone with delirium: is confused or forgetful […] These symptoms can start suddenly, over a few hours or days. They can last for a few days or weeks. […] Delirium is often caused by changes in your health, such as a physical illness or infection. It can also result from a change in your prescription medicines. […] Delirium can lead to several complications, including: falling and injuring yourself, pressure sores from being immobile, dehydration and malnutrition due to difficulty eating and drinking.

• #83 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is common, particularly among older people in hospital. […] These health problems make it hard for the brain to work properly. This causes the symptoms of delirium. […] Once this is done, its important to make conditions as ideal as possible for the persons brain to recover. […] For many people the symptoms of delirium usually improve in a few days, once the underlying causes have been treated. […] However, some people dont make a quick or full recovery and may still be having problems with memory and thinking several weeks or even months after becoming unwell. […] Having prolonged and severe delirium over several weeks can increase a persons risk of developing dementia.

• #84 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #85 Delirium – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/delirium/symptoms-causes/syc-20371386

  Delirium is a serious change in mental abilities. It results in confused thinking and a lack of awareness of someone’s surroundings. The disorder usually comes on fast within hours or a few days. […] Symptoms of delirium usually begin over a few hours or a few days. They typically occur with a medical problem. Symptoms often come and go during the day. There may be periods of no symptoms. Symptoms tend to be worse at night when it’s dark and things look less familiar. They also tend to be worse in settings that aren’t familiar, such as in a hospital. […] Delirium may last only a few hours or as long as several weeks or months. If the causes are addressed, the recovery time is often shorter. […] Recovery depends to some extent on the health and mental status before symptoms began. People with dementia, for example, may experience an overall decline in memory and thinking skills after a delirium episode. People in better health are more likely to fully recover.

• #86 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #87 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is common, particularly among older people in hospital. […] These health problems make it hard for the brain to work properly. This causes the symptoms of delirium. […] Once this is done, its important to make conditions as ideal as possible for the persons brain to recover. […] For many people the symptoms of delirium usually improve in a few days, once the underlying causes have been treated. […] However, some people dont make a quick or full recovery and may still be having problems with memory and thinking several weeks or even months after becoming unwell. […] Having prolonged and severe delirium over several weeks can increase a persons risk of developing dementia.

• #88 Delirium vs. dementia: Symptoms and more

  https://www.medicalnewstoday.com/articles/delirium-vs-dementia

  Delirium is also a risk factor for dementia because repeated episodes of temporary impairment of brain function make the brain cells susceptible to permanent damage. […] Delirium is preventable in 30-40% of cases. […] Delirium due to certain conditions such as drug or alcohol misuse and electrolyte imbalance typically resolves with treatment. However, delirium may cause more extended hospital stays, increase the risk of complications, increase healthcare costs, and speed up cognitive and functional decline and death. This is especially true in people with pre-existing dementia.

• #89 Delirium: What It Is, Symptoms, Treatment & Types

  https://my.clevelandclinic.org/health/diseases/15252-delirium

  Delirium is a fast-developing type of confusion that affects your ability to focus your attention and awareness. […] Delirium indicates a widespread disruption in brain activity. That means there are many possible symptoms of delirium. […] The main symptom of delirium is confusion. That means you have trouble with: […] Symptom patterns of delirium tend to fall into one of three categories: Hyperactive, Hypoactive, Mixed. […] Delirium is often preventable, but most preventive measures are things only clinical personnel should do. […] If you have delirium, the disruption in your brain function means you wont be truly aware of or able to understand whats happening to you. […] While delirium is temporary, the effects and symptoms can sometimes linger. […] The duration of delirium varies, and many factors can affect it. […] Delirium can affect your physical and mental health, quality of life and your overall sense of well-being, especially when its severe. […] In more severe or long-lasting cases, delirium can cause you to develop dementia or make existing dementia worse.

• #90 Caring for Someone With Delirium | Memorial Sloan Kettering Cancer Center

  https://www.mskcc.org/cancer-care/patient-education/delirium

  Delirium is a sudden (quick) change in the way a person thinks and acts. People with delirium cannot pay attention to whats going on around them, and their thinking is not clear. This can be scary for the person with delirium, their family, caregivers, and friends. […] Delirium can start suddenly, such as in a few hours, and can last for a few days. Or, it can happen slowly, over several days or weeks. The symptoms can come and go. […] Delirium happens suddenly. You will notice a change in the person right away. It often gets better with treatment. […] Someone with delirium may have 1 or more of these signs. They may: Seem confused. […] Delirium can last from a day to sometimes months. If the persons medical problems get better, they may be able to go home before their delirium goes away. Some peoples delirium symptoms get much better when they go home. […] Other people can still have delirium symptoms months after the cause of their delirium was treated. You may notice they still have trouble remembering things, such as the date or where they are.

• #91 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #92 Delirium (Causes, Symptoms, and Treatment) | Doctor

  https://patient.info/doctor/delirium-pro

  Delirium (sometimes called acute confusional state) is an acute, fluctuating syndrome of encephalopathy causing disturbed consciousness, attention, cognition, and perception. It usually develops over hours to days. Behavioural disturbance, personality changes, and psychotic features may occur. […] Symptoms are typically intermittent or fluctuate in severity). Lucid intervals usually occur during the day with the worst disturbance at night. Falling and loss of appetite are often warning signs for delirium. Behaviour changes (over hours to days) may include: […] There is often an indication of an underlying precipitating factor such as infection or an adverse drug reaction. […] The symptoms may coincide with underlying dementia – which is common. […] Delirium has a fluctuating course and recovery can be rapid or take weeks to months. Persistent delirium occurs more often in older hospitalized patients, and is associated with adverse outcomes. […] Factors associated with a poorer prognosis include: […] The most common causes are medical conditions such as infections, medications or drug withdrawal.

• #93 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #94 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #95 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Delirium-Symptoms.aspx

  Delirium is present in about 15 to 20% of patients who are admitted to hospital. […] The incidence of delirium is estimated to be around 0.5% in those aged between 18 and 55 years; 1.1% in those aged between 56 years and 85 years and 13.6% among those older than 85 years. […] Some examples of delirium symptoms include diminished awareness of surroundings, uncertainty about location or means of arriving there, inability to understand conversation and speak clearly, vivid, often frightening dreams that continue once awake, auditory hallucination, agitation and restlessness, fear that others are trying to cause harm, feeling drowsy and slow, sleeping during the day, but being awake at night, rapid mood swings that vary from scared and anxious to depressed or irritable, confusion that worsens in the evenings, reduced concentration, acute or subacute onset, memory deficits, mainly in short-term memory, slowed or increased movement, changes in sensation, incontinence. […] The abnormalities develop quickly, over the course of hours or days and tend to fluctuate in severity throughout the day.

• #96 Delirium vs. dementia: Symptoms and more

  https://www.medicalnewstoday.com/articles/delirium-vs-dementia

  Delirium is also a risk factor for dementia because repeated episodes of temporary impairment of brain function make the brain cells susceptible to permanent damage. […] Delirium is preventable in 30-40% of cases. […] Delirium due to certain conditions such as drug or alcohol misuse and electrolyte imbalance typically resolves with treatment. However, delirium may cause more extended hospital stays, increase the risk of complications, increase healthcare costs, and speed up cognitive and functional decline and death. This is especially true in people with pre-existing dementia.

• #97 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is common, particularly among older people in hospital. […] These health problems make it hard for the brain to work properly. This causes the symptoms of delirium. […] Once this is done, its important to make conditions as ideal as possible for the persons brain to recover. […] For many people the symptoms of delirium usually improve in a few days, once the underlying causes have been treated. […] However, some people dont make a quick or full recovery and may still be having problems with memory and thinking several weeks or even months after becoming unwell. […] Having prolonged and severe delirium over several weeks can increase a persons risk of developing dementia.

• #98 Delirium (sudden confusion) – Overview | Guy’s and St Thomas’ NHS Foundation Trust

  https://www.guysandstthomas.nhs.uk/health-information/delirium-sudden-confusion

  Delirium (sudden confusion) usually affects peoples brains for a short time. It is a common condition. Up to 1 in 3 people admitted to hospital become delirious at some time during their stay. […] People with delirium might be confused or agitated and act differently than usual. They can seem alert or drowsy (sleepy). They might also have memory problems or see and hear things that are not there. […] Depending on how bad the delirium is, a person may need to go into hospital for treatment and management. For others, delirium can be treated at home. […] Delirium can change within the space of a day. People may be delirious, then appear normal and then be delirious again. Symptoms are often worse at night. […] Delirium usually gets better. In 6 out of 10 people (60%), the symptoms disappear within 6 days. Others may have some symptoms for longer. About 1 in 20 people (5%) may still have delirium more than a month after they first had symptoms. […] Delirium is always a serious condition. Although many people make a full recovery, some people never get back to how they were completely. This may apply if you: have dementia, have had delirium before, live in a care home (because it is likely that you already have health problems).

• #99 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #100 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #101 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Delirium-Symptoms.aspx

  Delirium is present in about 15 to 20% of patients who are admitted to hospital. […] The incidence of delirium is estimated to be around 0.5% in those aged between 18 and 55 years; 1.1% in those aged between 56 years and 85 years and 13.6% among those older than 85 years. […] Some examples of delirium symptoms include diminished awareness of surroundings, uncertainty about location or means of arriving there, inability to understand conversation and speak clearly, vivid, often frightening dreams that continue once awake, auditory hallucination, agitation and restlessness, fear that others are trying to cause harm, feeling drowsy and slow, sleeping during the day, but being awake at night, rapid mood swings that vary from scared and anxious to depressed or irritable, confusion that worsens in the evenings, reduced concentration, acute or subacute onset, memory deficits, mainly in short-term memory, slowed or increased movement, changes in sensation, incontinence. […] The abnormalities develop quickly, over the course of hours or days and tend to fluctuate in severity throughout the day.

• #102 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Delirium arises through the interaction of a number of predisposing and precipitating factors. […] Individuals with multiple and/or significant predisposing factors are at high risk for an episode of delirium with a single and/or mild precipitating factor. […] Delirium exists across a range of arousal levels, either as a state between normal wakefulness/alertness and coma or as a state of heightened psychophysiological arousal. […] Delirium has been commonly classified into psychomotor subtypes of hypoactive, hyperactive, and mixed level of activity. […] Hyperactive symptoms include hyper-vigilance, restlessness, fast or loud speech, irritability, combativeness, impatience, swearing, singing, laughing, uncooperativeness, euphoria, anger, wandering, easy startling, fast motor responses, distractibility, tangentiality, nightmares, and persistent thoughts.

• #103 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Delirium-Symptoms.aspx

  Delirium is present in about 15 to 20% of patients who are admitted to hospital. […] The incidence of delirium is estimated to be around 0.5% in those aged between 18 and 55 years; 1.1% in those aged between 56 years and 85 years and 13.6% among those older than 85 years. […] Some examples of delirium symptoms include diminished awareness of surroundings, uncertainty about location or means of arriving there, inability to understand conversation and speak clearly, vivid, often frightening dreams that continue once awake, auditory hallucination, agitation and restlessness, fear that others are trying to cause harm, feeling drowsy and slow, sleeping during the day, but being awake at night, rapid mood swings that vary from scared and anxious to depressed or irritable, confusion that worsens in the evenings, reduced concentration, acute or subacute onset, memory deficits, mainly in short-term memory, slowed or increased movement, changes in sensation, incontinence. […] The abnormalities develop quickly, over the course of hours or days and tend to fluctuate in severity throughout the day.

• #104 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #105 Delirium (sudden confusion) – Dementia UK

  https://www.dementiauk.org/information-and-support/health-advice/delirium/

  Dementia can make people more likely to experience delirium. People who are over 80 and live with dementia are at greater risk, particularly during a hospital stay, when up to 50% of people with dementia develop delirium. […] About 60% of people with delirium recover within a week. Some people, however, take longer to recover, and some never get back to exactly how they were before – this is more likely if they have dementia.

• #106 Confusion (delirium in the elderly)

  https://emed.ie/Symptoms/Confusion.php

  Delirium is avoidable and treatable not an accepted factor in ageing!! […] Symptoms of delirium persist in about 1/3 of patients with a worse prognosis […] Disturbance of consciousness – reduced ability to focus […] Changed cognition or development of perceptual disturbance inc. hallucinations […] Disturbance of sleep-wake cycle […] Fluctuations over the course of the day […] Hyperactive: Heightened arousal […] Hypoactive: Listless / Sleepy […] Mixed: Commonest […] Memory for recent events since delirium began distorted […] Delirium Risk Factors: Age 65 […] Severe illness / Multiple disease […] Dementia […] Infection/dehydration […] Delirium Precipitants: LRTI/ UTI / Catheter […] Dehydration, Hypokalaemia […] Stroke, Epilepsy, SDH […] Hypoxia […] Sleep deprivation […] Urgent treatment: Immediate while identifying and correcting underlying causes

• #107 Delirium | Dementia Australia

  https://www.dementia.org.au/living-dementia/mood-and-behaviour-changes/delirium

  Delirium is a state of severe confusion. It often occurs in people living with dementia, but it can be hard to spot. Thats because the symptoms of delirium and dementia are similar. […] Delirium can come on quickly. It can result in the person seeming more confused than usual. It may look like: lack of attention or focus, short-term memory loss, rambling or incoherent speech, new difficulties with perception, restlessness, irritability, agitation and aggression, hallucinations and delusions, quietness, drowsiness and lethargy, disruptions in normal sleeping and eating patterns. […] If the person has experienced delirium in the past, they are more likely to get it again.

• #108 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Attention is a different function from consciousness, but it is dependent on it. […] In delirium, inattention occurs and it is also considered one of the important cardinal features. […] Typically there are global or multiple deficits in cognition, including memory impairment and disorientation. […] Disorientation is usually common, first in reference to time and then to place. […] The diagnosis of delirium remains primarily clinical, without specific diagnostic tests. […] Taking into account the acute onset and fluctuating course of delirium, it is important to establish the patients level of baseline cognitive functioning and the course of cognitive change. […] Delirium has also been associated with multiple adverse outcomes. […] In intensive care units, delirium has been shown to be associated with prolonged duration of mechanical ventilation, longer stay in hospital, and in the ICU as well as mortality during hospitalization.

• #109 Delirium (acute confusional state) – Skin Center

  https://www.skincenter.com/patient-education/healthwise?DOCHWID=std120718

  Delirium (acute confusional state) is a sudden change in a person’s mental status, leading to confusion and unusual behavior. […] Symptoms of delirium usually develop over the course of several hours to a few days. Symptoms may fluctuate and often include: […] Confusion and disorientation, including hallucinations, delusions, or illusions. […] Disorganized thinking. […] Short attention span. […] Problems with the sleep-wake cycle. […] Periods of hyperactivity alternating with extreme sleepiness. […] Delirium may be caused by withdrawal from alcohol or drugs or medicines. The development or worsening of an infection or other health problem can also lead to delirium. People who have dementia are more prone to delirium.

• #110 Delirium | EBSCO Research Starters

  https://www.ebsco.com/research-starters/health-and-medicine/delirium

  Precipitating circumstances include acute infection, polypharmacy (i.e., several medications that negatively impact psychological health), terminal illness, vascular pathology, unresolved and acute pain, and head injury. […] An individual who is already quite ill is at a much-increased risk of experiencing delirium. […] Though many hospital patients develop this illness during their stay, over 10 percent of patients are actually discharged from the hospital still experiencing delirium. […] The outcomes for delirium are negative and include death, more health interventions (cost and pain), and increased length of stay in the intensive care unit or other hospital unit. […] Nearly half of all cancer patients receiving palliative care have delirium upon admission, while 88 percent of dying cancer patients demonstrate the syndrome.

• #111 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Delirium in both medical and surgical elderly hospitalized patients has been associated with multiple adverse outcomes that have been well documented. […] Delirium complicates 24-89% of inpatient stays for elderly patients with dementia. […] Although traditionally viewing delirium as a transient and reversible condition, some studies have found evidence that a significant proportion of patients do not recover from delirium, presenting persistent symptoms at time of discharge, or beyond.

• #112 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #113 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #114 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #115 Patients and Families Overview

  https://www.icudelirium.org/patients-and-families/overview

  What is delirium? The word delirium is used to describe a severe state of confusion. People with delirium: […] Delirium is common. About 2 out of 3 patients in ICUs get delirium. Seven out of 10 patients get delirium while they are on a breathing machine or soon after. […] Signs of delirium you may see in your family member are: […] Delirium comes on quickly, in hours or days. Signs of delirium can change from one day to the next. […] People often ask if delirium causes thinking problems after a patient leaves the hospital. Research shows that patients who develop delirium might have dementia-like thinking problems that can last for months.

• #116 Delirium – Wikipedia

  https://en.wikipedia.org/wiki/Delirium

  Hypoactive symptoms include decreased alertness, sparse or slow speech, lethargy, slowed movements, staring, and apathy. […] Mixed level of activity describes instances of delirium where activity level is either normal or fluctuating between hyperactive and hypoactive. […] Delirium occurs in 11-51% of older adults after surgery, in 81% of those in the ICU, and in 20-22% of individuals in nursing homes or post-acute care settings. […] Delirium is a risk factor for death within the next year.

• #117 Delirium in Elderly People: A Review

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3377955/

  Delirium in both medical and surgical elderly hospitalized patients has been associated with multiple adverse outcomes that have been well documented. […] Delirium complicates 24-89% of inpatient stays for elderly patients with dementia. […] Although traditionally viewing delirium as a transient and reversible condition, some studies have found evidence that a significant proportion of patients do not recover from delirium, presenting persistent symptoms at time of discharge, or beyond.

• #118 Confusion and Delirium | Cancer-related Side Effects | American Cancer Society

  https://www.cancer.org/cancer/managing-cancer/side-effects/changes-in-mood-or-thinking/confusion.html

  Many people have confusion and delirium at the end of their life. Some people believe that hallucinations at the end of life are part of the dying process. Treatment may not be needed if the hallucinations are not upsetting. For example, people may see family members or friends who have already died. This can be comforting. But if the hallucinations are scary, treatment can help.

• #119 Delirium | EBSCO Research Starters

  https://www.ebsco.com/research-starters/health-and-medicine/delirium

  Precipitating circumstances include acute infection, polypharmacy (i.e., several medications that negatively impact psychological health), terminal illness, vascular pathology, unresolved and acute pain, and head injury. […] An individual who is already quite ill is at a much-increased risk of experiencing delirium. […] Though many hospital patients develop this illness during their stay, over 10 percent of patients are actually discharged from the hospital still experiencing delirium. […] The outcomes for delirium are negative and include death, more health interventions (cost and pain), and increased length of stay in the intensive care unit or other hospital unit. […] Nearly half of all cancer patients receiving palliative care have delirium upon admission, while 88 percent of dying cancer patients demonstrate the syndrome.

• #120 Confusion (Delirium) Appears Common among Individuals in Inpatient Rehabilitation – Brain Injury Association of America

  https://biausa.org/professionals/research/tbi-model-systems/confusion-delirium-appears-common-among-individuals-in-inpatient-rehabilitation

  Delirium appears common among individuals with traumatic brain injury in inpatient rehabilitation. Sixty-nine percent of the individuals in this study met the criteria for delirium at the time of admission to inpatient rehabilitation. This rate is significantly higher than reported for individuals with other medical diagnoses in prior studies which typically included older individuals. […] Symptoms of delirium include problems with attention span, remaining awake, thinking, and inconsistency in abilities over time. Other features can include altered activity levels, psychotic symptoms (hallucinations, delusions), and mood swings. […] The post-traumatic confusional state appeared average 43 days among participants in this study. Overall, this group of individuals with traumatic brain injury had a higher incidence of delirium than reported in prior studies of individuals with other medical conditions (69% vs. 20%) which typically included older individuals.

• #121 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium is more common among older adults. It is a common reason that family members of older adults seek help from a doctor or at a hospital. About 15 to 50% of older adults experience delirium at some time during a hospital stay. […] Delirium tends to last longer in older adults, compared to younger people. Confusion, the most obvious symptom, may be harder to recognize in older adults. Younger people with delirium may be agitated, but very old people tend to become quiet and withdrawn. In such cases, recognizing delirium is even harder.

• #122 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #123 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium is more common among older adults. It is a common reason that family members of older adults seek help from a doctor or at a hospital. About 15 to 50% of older adults experience delirium at some time during a hospital stay. […] Delirium tends to last longer in older adults, compared to younger people. Confusion, the most obvious symptom, may be harder to recognize in older adults. Younger people with delirium may be agitated, but very old people tend to become quiet and withdrawn. In such cases, recognizing delirium is even harder.

• #124 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium is more common among older adults. It is a common reason that family members of older adults seek help from a doctor or at a hospital. About 15 to 50% of older adults experience delirium at some time during a hospital stay. […] Delirium tends to last longer in older adults, compared to younger people. Confusion, the most obvious symptom, may be harder to recognize in older adults. Younger people with delirium may be agitated, but very old people tend to become quiet and withdrawn. In such cases, recognizing delirium is even harder.

• #125 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #126 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium is more common among older adults. It is a common reason that family members of older adults seek help from a doctor or at a hospital. About 15 to 50% of older adults experience delirium at some time during a hospital stay. […] Delirium tends to last longer in older adults, compared to younger people. Confusion, the most obvious symptom, may be harder to recognize in older adults. Younger people with delirium may be agitated, but very old people tend to become quiet and withdrawn. In such cases, recognizing delirium is even harder.

• #127 Delirium – Neurologic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/neurologic-disorders/delirium-and-dementia/delirium

  Very old people with delirium tend to become quiet and withdrawn changes that may be mistaken for depression. […] Memory impairment and inattention may also be the initial symptoms of delirium in older adults. […] Delirium can be a common presenting symptom in older patients with infection. […] In older adults, delirium tends to last longer, and recovery may be slow (days to even weeks or months), resulting in longer hospital stays, increased risk and severity of complications, increased costs, and long-term disability. Some patients never fully recover from delirium.

• #128 What Causes Sudden Confusion in Elderly Adults?

  https://www.griswoldcare.com/blog/what-causes-sudden-confusion-in-elderly-adults/

  Sudden confusion in the elderly, often referred to as delirium, is alarming for both the elderly person and those who love them. […] Assessing confusion in the elderly is necessary to determine whether there is an underlying cause or medical reason for it, especially if elderly confusion comes and goes. […] If an elderly person has a sudden change in behavior, including extreme agitation, hallucinations, and overall disoriented thinking, an untreated UTI is often the cause. […] Up to one-third of elderly patients hospitalized with UTIs experience some degree confusion and reduced awareness of their surroundings according to research conducted at Cedar-Sinai research centers. […] An infection anywhere in the body can cause these symptoms, so a visit to the doctor is necessary to determine the reason for the sudden confusion.

• #129 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is a change in a persons mental state that happens suddenly over 1-2 days. […] The most important part of identifying delirium is noticing a sudden change in a persons mental state that theyre not themselves. […] A person with delirium may: be less alert and not respond to things happening around them, be easily distracted, be less aware of where they are, or what time it is (disorientation), suddenly be less able to do something (for example, walking or eating), speak less clearly or struggle to follow a conversation, have sudden swings in mood or behaviour, have hallucinations see or hear things that arent real, have delusions or become paranoid strongly believing things that are not true. […] Delirium develops suddenly (1-2 days). […] Symptoms can change a lot from hour to hour.

• #130 Temporary Confusion & Disorientation (Delirium): Causes & Treatment

  https://www.webmd.com/brain/sudden-confusion-causes

  Sudden confusion, sometimes called delirium or encephalopathy, can be a sign of many health problems. It comes on quickly, within hours or days. Its different from dementia (like Alzheimers disease), which causes slow changes over months or years. […] Symptoms can vary. Some people become quiet and withdrawn, while others get nervous and upset. They may: […] These symptoms will start suddenly. They may come and go or steadily get worse later in the day. […] Many conditions or health problems can cause sudden confusion, and some are more serious than others: […] Once doctors can get the cause under control, the confusion usually goes away. It can take hours or days to recover, sometimes longer. In the meantime, some people may need medication to keep them calm and help with their confusion.

• #131 What is delirium? Symptoms, causes, diagnosis, and treatment

  https://www.medicalnewstoday.com/articles/326684

  Delirium is a sudden change in a persons mental function. This can include their ways of thinking, behavior, or level of consciousness. […] Delirium results in a sudden change in a persons mental function, which can disrupt their ability to concentrate, think, remember, and sleep. It can also cause fluctuations in their level of consciousness. […] Delirium can occur as a result of aging, alcohol withdrawal, certain medications, and underlying medical conditions. […] All types of delirium can include the following symptoms: confusion or disorientation, memory loss, slurred speech or difficulty speaking coherently, difficulty concentrating, hallucinations, changes in sleep patterns, changes in mood or personality. […] According to the authors of a 2018 review article, people may continue experiencing symptoms of delirium for several days to months after doctors start treating the underlying cause. […] Delirium refers to a sudden change in mental status, which can result in confusion, memory issues, or changes in a persons emotional state or state of consciousness.

• #132 Delirium – Brain, Spinal Cord, and Nerve Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/brain-spinal-cord-and-nerve-disorders/delirium-and-dementia/delirium

  Delirium usually begins suddenly and progresses over hours or days. The hallmark of delirium is an inability to pay attention. People with delirium cannot concentrate, so they have trouble processing new information and cannot recall recent events. Thus, they do not understand what is happening around them. They become disoriented. Sudden confusion about time and often about place (where they are) may be an early sign of delirium. If delirium is severe, people may not know who they or other people are. Thinking is confused, and people with delirium ramble, sometimes becoming incoherent. Their level of awareness (consciousness) may fluctuate. That is, people may be overly alert one moment and drowsy and sluggish the next. Other symptoms also often change within minutes and tend to worsen during the evening (a phenomenon called sundowning). Delirium can last hours, days, or even longer, depending on the severity and the cause. If the cause of delirium is not quickly identified and treated, people may become increasingly drowsy and unresponsive, requiring vigorous stimulation to be aroused (a condition called stupor). Stupor may lead to coma or death.

• #133 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium is defined as a transient, usually reversible, cause of mental dysfunction and manifests clinically with a wide range of neuropsychiatric abnormalities. It can occur at any age, but it occurs more commonly in patients who are elderly and have a previously compromised mental status. […] The clinical hallmarks of delirium are decreased attention or awareness and a change in baseline cognition. Delirium often manifests as a waxing and waning type of confusion. Symptoms include the following: Clouding of consciousness, Difficulty maintaining or shifting attention, Disorientation, Illusions, Hallucinations, Fluctuating levels of consciousness, Dysphasia, Dysarthria, Tremor, Asterixis in hepatic encephalopathy and uremia, Motor abnormalities. […] The disturbance develops over a short period (usually hours to days) and tends to fluctuate during the course of the day.

• #134 Delirium: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/000740.htm

  Delirium is sudden severe confusion due to rapid changes in brain function that can occur with physical or mental illness. […] Delirium involves a quick change between mental states (for example, from lethargy to agitation and back to lethargy). […] Symptoms include: Changes in alertness (usually more alert in the morning, less alert at night), Changes in feeling (sensation) and perception, Changes in level of consciousness or awareness, Changes in movement (for example, may be slow moving or hyperactive), Changes in sleep patterns, drowsiness, Confusion (disorientation) about time or place, Decrease in short-term memory and recall, Disorganized thinking, such as talking in a way that doesn’t make sense, Emotional or personality changes, such as anger, agitation, depression, irritability, and overly happy, Incontinence, Movements triggered by changes in the nervous system, Problem concentrating. […] Delirium often lasts about 1 week. It may take several weeks for mental function to return to normal. Full recovery is usually expected, but depends on the underlying cause of the delirium.

• #135 Delirium | MedlinePlus

  https://medlineplus.gov/delirium.html

  Delirium is a mental state in which you are confused, disoriented, and not able to think or remember clearly. It usually starts suddenly. The symptoms of delirium usually start suddenly, over a few hours or a few days. They often come and go. Delirium starts suddenly and can cause hallucinations. The symptoms may get better or worse and can last for hours or weeks. […] Treatment of delirium focuses on the causes and symptoms of delirium. The first step is to identify the cause. Often, treating the cause will lead to a full recovery. The recovery may take some time – weeks or sometimes even months.

• #136 Delirium: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/288890-overview

  Delirium significantly worsens prognosis and is associated with increased mortality at discharge and at 12 months. A significant proportion of patients with delirium during their hospital admission continued to demonstrate symptoms of delirium at discharge, 6-month, and 12-month follow-up. […] Resolution of symptoms may take longer in patients with poor premorbid cognitive function, incorrect or incomplete diagnosis of contributing factors, and structural brain diseases treated with large doses of psychoactive medications prior to the onset of acute medical illness. For some patients, the cognitive effects of delirium may resolve slowly or not at all.

• #137 Delirium – symptoms, diagnosis and treatment | Alzheimer’s Society

  https://www.alzheimers.org.uk/get-support/daily-living/delirium

  Delirium is common, particularly among older people in hospital. […] These health problems make it hard for the brain to work properly. This causes the symptoms of delirium. […] Once this is done, its important to make conditions as ideal as possible for the persons brain to recover. […] For many people the symptoms of delirium usually improve in a few days, once the underlying causes have been treated. […] However, some people dont make a quick or full recovery and may still be having problems with memory and thinking several weeks or even months after becoming unwell. […] Having prolonged and severe delirium over several weeks can increase a persons risk of developing dementia.

• #138 Delirium vs. Dementia | A Place for Mom

  https://www.aplaceformom.com/caregiver-resources/articles/delirium-vs-dementia

  If you notice a sudden difference in your seniors mental state or behavior, its important to seek medical care right away. […] Although delirium symptoms usually fade after the cause of delirium is addressed, it may take some time for your loved one to fully recover. During the aftermath of a delirium episode, your loved one may experience health issues or difficulty with readjusting to their lifestyle.

• #139 Confusion – symptoms, causes and prevention | healthdirect

  https://www.healthdirect.gov.au/confusion

  Confusion can suddenly develop and then pass. It can also develop slowly and become a long-term problem. Confusion can range from mild to severe. […] Confusion can be a sign of a serious medical condition. Call triple zero (000) and ask for advice if you or someone you care for experience any of the following: sudden onset of confusion, new or worse symptoms, skin or lips are turning blue, concern about the person’s health or safety.

• #140 Recognizing Delirium – My HealtheVet – My HealtheVet

  https://www.myhealth.va.gov/mhv-portal-web/ss20240510-recognizing-delirium

  Delirium is a sudden change in a person’s mental state that comes and goes over short periods of time. […] Someone with delirium may also have the following symptoms: Changes in sleep patterns, Confusion about time and place, Wandering attention, Disorganized thinking, Problems with memory and speech, Changes in mood or personality, Hallucinations. […] Delirium is a medical emergency. If it’s not diagnosed and treated, it can lead to lasting problems or death.

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