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• #1

  https://www.healio.com/news/primary-care/20191206/narcolepsy-diagnoses-plagued-by-misunderstandings

  The symptoms of narcolepsy are often mistaken or even missed by physicians, which can seriously impact patient care. […] It is often 10 years from the onset of narcolepsy symptoms until the patient is accurately diagnosed. […] A 2014 Postgraduate Medicine survey showed that only 7% of primary care physicians and 22% of sleep specialists identified all the key narcolepsy symptoms. […] Nearly 30 years ago, sleep disorder experts wrote in the Journal of Clinical Neurophysiology that narcolepsy is probably the most clearly misunderstood diagnostic category among patients who complain of excessive daytime sleepiness, generally considered a telltale feature of the condition. […] Patients with narcolepsy either have Type 1 or Type 2 narcolepsy. […] She said patients with both types of the condition experience excessive daytime sleepiness.

• #1 Narcolepsy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/narcolepsy/symptoms-causes/syc-20375497

  Narcolepsy is divided into two types. Most people with type 1 narcolepsy have cataplexy. Most people with type 2 narcolepsy don’t have cataplexy. […] See your healthcare professional if you experience daytime sleepiness that affects your personal or professional life. […] The exact cause of narcolepsy is not known. People with type 1 narcolepsy have low levels of hypocretin (hi-poe-KREE-tin), also called orexin. Hypocretin is a chemical in the brain that helps control being awake and entering REM sleep. […] In narcolepsy, you may suddenly enter REM sleep after going through minimal NREM sleep. This can happen both at night and during the day. Cataplexy, sleep paralysis and hallucinations are similar to changes that occur in REM sleep. But in narcolepsy, these symptoms happen while you’re awake or sleepy.

• #1

  https://www.healio.com/news/primary-care/20191206/narcolepsy-diagnoses-plagued-by-misunderstandings

  The symptom that differentiates the two types of narcolepsy is cataplexy partial or generalized flaccid paralysis precipitated by anticipatory excitement, laughter, anger or surprise which is only experienced by patients with type 1. […] Bogan said patients ultimately diagnosed with narcolepsy are most likely to report excessive daytime sleepiness first. […] Ideally, patients who report narcolepsy’s symptoms should undergo a spinal tap to ascertain hypocretin levels in their cerebrospinal fluid. […] According to the NIH, if patients have low levels of the brain hormone, sleep studies are recommended. […] To confirm the diagnosis of narcolepsy even without spinal fluid analysis, patients should undergo two tests, both of which can be conducted at a sleep clinic. […] The first is a polysomnogram to determine whether REM sleep takes place early in the sleep cycle and to rule out if the patients symptoms result from another condition, like sleep apnea.

• #1 Narcolepsy: Diagnosis and management | Cleveland Clinic Journal of Medicine

  https://www.ccjm.org/content/85/12/959

  Narcolepsy should be considered in the differential diagnosis for chronic excessive daytime sleepiness, but this disorder has many mimics. […] The history should include specific questions about the hallmark features of narcolepsy, including cataplexy, sleep paralysis, and sleep-related hallucinations. […] The multiple sleep latency test consists of 4 to 5 nap opportunities at 2-hour intervals in a quiet dark room conducive to sleep, during which both sleep and REM latency are recorded. […] A diagnosis of narcolepsy requires a SOREMP in at least 2 of the naps in a multiple sleep latency test (or 1 nap if the shortened REM latency is seen during polysomnography). […] Narcolepsy type 1 is distinguished from type 2 by the presence of cataplexy. […] The diagnosis of narcolepsy type 1 requires excessive daytime sleepiness for at least 3 months that cannot be explained by another sleep disorder, medical or neurologic disorder, mental disorder, medication use, or substance use disorder, and at least 1 of the following: Cataplexy and mean sleep latency of 8 minutes or less with at least 2 SOREMPs on multiple sleep latency testing.

• #1 Narcolepsy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK459236/

  Narcolepsy is a disorder of rapid onset rapid eye movement (REM) sleep characterized by excessive daytime sleepiness (EDS), frequent uncontrollable sleep attacks as well as sleep fragmentation and can be associated with cataplexy, sleep paralysis, and hypnagogic hallucinations. […] The condition is often under-diagnosed and delays of 5-10 years are common before making a firm diagnosis. […] The only required symptom for the diagnosis of narcolepsy is daily, irrepressible, rapid lapses into REM sleep known as sleep attacks that are present for at least three months. […] In order to make a diagnosis of narcolepsy, the individual must have symptoms occurring at least three times a week over the past 3 months. In addition, one of the following must be present: Hypocretin deficiency, Episodes of cataplexy occurring at least several times a month, REM sleep latency of fewer than 15 minutes or two or more sleep-onset REM periods (SOREMPs) and a mean sleep latency of fewer than 8 minutes.

• #1 Narcolepsy – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/narcolepsy/diagnosis-treatment/drc-20375503

  Your healthcare professional may suspect narcolepsy based on your symptoms of daytime sleepiness and sudden loss of muscle tone, known as cataplexy. Your healthcare professional likely will refer you to a sleep specialist. Formal diagnosis usually requires staying overnight at a sleep center for an in-depth sleep analysis. […] A sleep specialist will likely diagnose narcolepsy and determine how serious it is based on: […] A detailed sleep history can help with a diagnosis. You’ll likely fill out the Epworth Sleepiness Scale. The scale uses short questions to measure your degree of sleepiness. […] You may be asked to write down your sleep pattern for a week or two. This allows your healthcare professional to compare how your sleep pattern may relate to how alert you feel. […] This test measures signals during sleep using flat metal discs called electrodes placed on your scalp. […] This test measures how long it takes you to fall asleep during the day. […] Occasionally, a genetic test may be performed to see if you’re at risk of type 1 narcolepsy. […] These tests also can help rule out other possible causes of your symptoms.

• #1

  https://www.nhs.uk/conditions/narcolepsy/diagnosis/

  Narcolepsy can usually be diagnosed by observing how you sleep and ruling out other conditions. […] Your GP may carry out several tests to help rule out other conditions that could be causing your symptoms. […] If your GP thinks you may have narcolepsy, they’ll refer you to a specialist in sleep disorders, who will analyse your sleep patterns. […] Your GP will use the results to decide whether to refer you to a sleep specialist. […] After you have slept, a specialist will analyse your test results to determine whether you have normal brain wave activity, breathing patterns, and muscle and eye movement. […] A positive result supports a diagnosis, but does not make it 100% certain 30% of people without narcolepsy also have the genetic marker. […] Research has shown that measuring the level of hypocretin in your cerebrospinal fluid, which surrounds the brain and spinal cord, can be useful in diagnosing narcolepsy. […] This test is increasingly being used by sleep disorder specialists to help make a diagnosis.

• #1 How is Narcolepsy Diagnosed?

  https://www.wakeupnarcolepsy.org/about/diagnosis/

  How is Narcolepsy Diagnosed? […] Diagnosing Narcolepsy can be a time consuming and frustrating process. […] On average, it takes 10 years from onset of symptoms to an official diagnosis of Narcolepsy and visits to approximately six different specialists. […] Prior to diagnosis, it is not uncommon for people to be misdiagnosed with other sleep disorders, depression, psychiatric conditions, ADHD and even epilepsy. […] When you visit your doctor, he or she will ask for a detailed sleep history. […] If your doctor suspects Narcolepsy, he or she will most likely recommend sleep studies. […] These sleep studies usually consist of Polysomnogram (PSG), which is an overnight stay in a sleep laboratory, followed the next day by the Multiple Sleep Latency Test (MSLT). […] A PSG is a recording of brain waves, oxygen levels, eye movements, muscle tone and heart and breathing rates.

• #1

  https://www.morethantired.com/adult-narcolepsy-symptom-screener/

  Screeners such as the ESS (above) and the Swiss Narcolepsy Scale (SNS) (below) can help screen for excessive daytime sleepiness (EDS) and narcolepsy with cataplexy (respectively), but proper diagnosis requires a complete exam from a healthcare provider, such as a sleep specialist. To help him or her make an accurate diagnosis, be open and honest about all of your symptoms and be sure to share your ESS and SNS scores. […] Negative scores are suggestive of narcolepsy with cataplexy. […] The screeners above can help screen for excessive daytime sleepiness (EDS) in narcolepsy and for narcolepsy with cataplexy, but proper diagnosis requires a complete exam from a healthcare provider. To help him or her make an accurate diagnosis, be open and honest about all of the symptoms you may be experiencing and be sure to share your scores from the screeners above.

• #1 Diagnosis | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/sleep/narcolepsy/diagnosis.html

  If all the common symptoms of narcolepsy are present, diagnosing the disorder is fairly straightforward. However, if sleep attacks are isolated and there is only mild or no cataplexy, making a correct diagnosis is more challenging. It requires excluding carefully insufficient sleep (sleep deprivation), disturbed nocturnal sleep, insomnia, circadian rhythm disorders, sleep-related breathing (sleep apnea) disorders and psychiatric disorders. A general medical check up excluding anemia, hypothyroidism, heart or other general medical issues is essential. […] Stanford Sleep Specialists use two main tests to diagnose narcolepsy: the nocturnal polysomnogram and the multiple sleep latency test (MSLT). The polysomnogram continuously records brain waves during sleep, as well as a number of nerve and muscle functions during nighttime sleep. During the test, the narcoleptic will usually fall asleep rapidly, enter REM sleep quickly, and potentially awaken frequently during the night.

• #1 Testing for Narcolepsy | Sleep Medicine

  https://sleep.hms.harvard.edu/education-training/public-education/sleep-and-health-education-program/sleep-health-education-13

  Sleep studies can provide information about how you sleep. These studies usually include an overnight stay followed the next day by a series of five daytime naps in a sleep laboratory. […] In people with narcolepsy, the sleep studies usually provide clear evidence of sleepiness and abnormal patterns of REM sleep. […] If a doctor suspects narcolepsy, he or she will likely recommend sleep studies. These tests are essential to provide clear evidence of sleepiness, to examine the pattern of rapid-eye-movement (REM) sleep, and to determine whether other disorders might be contributing to a patients symptoms. […] The diagnosis of narcolepsy is usually supported by test results from a polysomnogram and the Multiple Sleep Latency Test (MSLT). […] Testing usually consists of an overnight stay in a sleep laboratory for a test called a polysomnogram, followed the next day by the Multiple Sleep Latency Test (commonly known as the MSLT).

• #1 Testing for Narcolepsy | Sleep Medicine

  https://sleep.hms.harvard.edu/education-training/public-education/sleep-and-health-education-program/sleep-health-education-13

  The Multiple Sleep Latency Test is often the most important test for diagnosing narcolepsy. […] In people with narcolepsy, the overnight polysomnogram is often normal. However, about one-third of patients with narcolepsy with cataplexy will enter REM sleep within 15 minutes after falling asleep, and this is considered very supportive of a diagnosis of narcolepsy. […] If someone has narcolepsy, the MSLT usually reveals that the person falls asleep rapidly (in less than eight minutes on average across the naps) and enters REM sleep during two or more naps. This pattern on the MSLT is considered highly suggestive of narcolepsy. […] People with narcolepsy can fall asleep quickly, even after a good nights sleep. […] People with narcolepsy have impaired regulation of REM sleep. Normally, REM sleep occurs only during the night, but in people with narcolepsy, it can occur at any time of day.

• #1 Diagnosis | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/sleep/narcolepsy/diagnosis.html

  For the MSLT, a person is given 4-5 opportunities to sleep every two hours during normal wake times. The specialist uses the test to measure the extent of daytime sleepiness (how fast the patient falls asleep in each nap, also called sleep latency), and also how quickly REM sleep begins, since narcoleptics fall asleep quickly and experience REM sleep early. A positive MSLT (diagnostic for narcolepsy) is obtained when the patient did fall asleep with a mean sleep latency below 8 minutes in the naps, and had at least 2 naps where REM sleep was reached. […] In addition to the above, Stanford Sleep Specialists will commonly performed a blood genetic test for narcolepsy if they suspect hypocretin deficiency called Human Leukocyte Antigen (HLA) DQB1*06:02 typing. Almost 99% of subjects where narcolepsy is caused by a lack of hypocretin are DQB1*06:02 positive, but approximately 25% of the normal US population is positive as well so a negative test is used to exclude hypocretin deficiency.

• #1 Narcolepsy: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/1188433-overview

  Narcolepsy is characterized by the classic tetrad of excessive daytime sleepiness (EDS), cataplexy, hypnagogic hallucinations, and sleep paralysis. […] Sleep studies are an essential part of the evaluation of patients with possible narcolepsy. The combination of an overnight polysomnogram (PSG) followed by a multiple sleep latency test (MSLT) showing sleep latency 8 minutes and two or more sleep-onset random eye movement periods (SOREMPs) strongly suggests narcolepsy while excluding other sleep disorders. […] Whenever possible, the diagnosis of narcolepsy should be confirmed by polysomnography (PSG) followed by MSLT; the MSLT should show sleep latency 8 minutes or less and two or more sleep-onset REM periods (SOREMPs). A SOREMP on PSG the night preceding the MSLT may replace one of the SOREMPs on the MSLT. This change in the SOREMP requirement means that clinicians need to pay closer attention to the early stage scoring of night PSGs. An alternative criterion for diagnosis is a CSF hypocretin level of 110 pg/mL or lower.

• #1 Diagnosis | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/sleep/narcolepsy/diagnosis.html

  In some selected cases, especially if Human Leukocyte Antigen (HLA) DQB1*06:02 is positive but the case is unclear, a lumbar puncture may be performed, Cerebrospinal Fluid (CSF) drawn, and CSF hypocretin-1 measured. If CSF hypocretin-1 is below 110 pg/ml, the diagnosis is consistent with narcolepsy caused by hypocretin deficiency. This particular test was first developed at Stanford and is the most definitive test for narcolepsy. Other radiological, genetic or biochemical tests may also be ordered in selected cases.

• #1 Narcolepsy – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK459236/

  The first step is ensuring that the patient is regularly getting at least 6 hours of sleep per night for at least two weeks. […] If the patient is getting a minimum of 6 hours of sleep per night, then a reasonable next step is a polysomnogram (PSG) to rule out other possible sleep disorders such as sleep apnea. […] Narcolepsy type 1 can also be diagnosed if hypocretin-1 is low in the cerebrospinal fluid (110 pg/mL or 1/3 the mean normal value for a given assay). This testing could be helpful to confirm or exclude the diagnosis.

• #1 DNA Narcolepsy Risk Test | Genex Diagnostics

  https://www.genexdiagnostics.com/dna-narcolepsy-test/

  DNA Narcolepsy Risk Test […] If you experience excessive daytime sleepiness or find yourself unintentionally dozing off, it could be a sign of narcolepsy. Narcolepsy is a sleep disorder that disrupts the normal sleep-wake cycle, making it difficult to maintain alertness. This simple DNA test can help uncover the cause of your excessive daytime sleepiness. […] This genetic analysis detects the HLA-DQB1*06:02 allele associated with narcolepsy. It is a useful tool, in conjunction with other clinical symptoms, for an accurate narcolepsy diagnosis. […] Approximately 90-99% of people with narcolepsy carry a variant of the HLA-DQB1 gene known as the HLA-DQB1*06:02 allele. […] Symptoms of Narcolepsy include excessive daytime sleepiness (100% of affected individuals), cataplexy a sudden loss of voluntary muscle tone (70% of affected individuals), sleep paralysis and/or vivid hallucinations (10 to 20% of affected individuals), microsleep (sleep episodes that only last a few seconds), nighttime wakefulness, atonia (loss of muscle strength), involuntary leg muscle contractions, and rapid entry into REM sleep.

• #1 Narcolepsy – Wikipedia

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

  ICSD-3 diagnostic criteria posits that the individual must experience „daily periods of irrepressible need to sleep or daytime lapses into sleep” for both subtypes of narcolepsy. […] For a diagnosis of type 1 narcolepsy, the person must present with either cataplexy, a mean sleep latency of less than 8 minutes, and two or more sleep-onset REM periods (SOREMPs), or they must present with a hypocretin-1 concentration of less than 110 pg/mL. […] A diagnosis of type 2 narcolepsy requires a mean sleep latency of less than 8 minutes, two or more SOREMPs, and a hypocretin-1 concentration of more than 110 pg/mL. […] Diagnosis is relatively easy when all the symptoms of narcolepsy are present, but if the sleep attacks are isolated and cataplexy is mild or absent, diagnosis is more difficult. […] Three tests that are commonly used in diagnosing narcolepsy are polysomnography (PSG), the multiple sleep latency test (MSLT), and the Epworth Sleepiness Scale (ESS). […] Measuring orexin levels in a person’s cerebrospinal fluid sampled in a spinal tap may help in diagnosing narcolepsy, with abnormally low levels serving as an indicator of the disorder.

• #1 Resources for Diagnosing Narcolepsy | Know Narcolespy HCP

  https://knownarcolepsyhcp.com/resources/diagnosis

  ICD-10 codes ICD-10 codes ICSD-3-TR criteria ICD-10 codes ICSD-3-TR criteria […] Criteria A-C must be met […] The patient has daily periods of irrepressible need to sleep or daytime lapses into drowsiness or sleep […] The presence of one or both of the following: […] CSF hypocretin-1 concentration, measured by radioimmunoassay, is either 110 pg/mL (using a Stanford reference sample) or 1/3 of mean values obtained in normal subjects with the same standardized assay […] The symptoms and signs are not better explained by chronic insufficient sleep, a circadian rhythm sleep-wake disorder or other current sleep disorder, mental disorder, or medication/substance use or withdrawal […] Criteria A-E must be met […] The patient has daily periods of irrepressible need to sleep or daytime lapses into drowsiness or sleep occurring for at least three months

• #1 Resources for Diagnosing Narcolepsy | Know Narcolespy HCP

  https://knownarcolepsyhcp.com/resources/diagnosis

  A mean sleep latency of 8 minutes and two or more SOREMPs on an MSLT performed in accordance with current recommended protocols […] If CSF hypocretin-1 concentration measured by radioimmunoassay is either 110 pg/mL (when using a Stanford reference sample) or 1/3 of mean values obtained in normal subjects with the same standardized assay […] The symptoms and signs are not better explained by chronic insufficient sleep, a circadian rhythm sleep-wake disorder or other current sleep disorder, mental disorder, or medication/substance use or withdrawal […] If hypocretin deficiency is verified, the diagnosis of narcolepsy type 1 should be made regardless of other comorbidities that could potentially be related to clinical symptoms, given the definitive nature of this finding […] The diagnostic value of a SOREMP on nocturnal polysomnography in the absence of MSLT SOREMPs is not established for narcolepsy type 2

• #1 Narcolepsy Information | Mount Sinai – New York

  https://www.mountsinai.org/health-library/report/narcolepsy

  The current American Psychiatric Association diagnostic guidelines (DSM-5) require the presence of EDS for a narcolepsy diagnosis. This is defined as periods of feeling an irrepressible need to sleep or lapsing into sleep recurring multiple times within the same day, at least 3 days per week in the last 3 months. […] Measurements of hypocretin-1 in the cerebrospinal fluid may be used in identifying difficult to diagnose cases of narcolepsy, since hypocretin is often absent in people with the condition. […] A genetic test to detect carriers of HLA-DQB1*0602 may also be considered in some cases. This variation is present in most patients with narcolepsy type 1 and in about 50% of patients with narcolepsy type 2. However, HLA-DQB1*0602 is also present in the general population. Therefore its presence does not necessarily confirm the narcolepsy diagnosis. […] Ruling out Other Sleep Disorders […] Ruling out Psychological Disorders […] Ruling out Epilepsy

• #1 The Mysterious Nature of Narcolepsy – National Sleep Foundation

  https://www.thensf.org/the-the-mysterious-nature-of-narcolepsy/

  Narcolepsy is often hard to diagnose because its symptoms may overlap with those seen with metabolic neurological, sleep, or psychiatric health issues. […] Persistent excessive daytime sleepiness despite getting adequate hours of sleep, sleep paralysis (where you cant move or speak upon waking) and hallucinations while falling asleep or waking up are all symptoms linked to the two types of narcolepsy: type 1 and type 2. […] Diagnosing narcolepsy typically involves a study in a sleep lab, which includes an overnight polysomnogram (PSG) followed by several scheduled daytime naps in a Multiple Sleep Latency Test (MSLT). […] While it takes a proper diagnosis and appropriate treatment and support to manage symptoms, living well with narcolepsy can be achieved. […] Narcolepsy can be very difficult to diagnose. It occurs in only about 1 in every 2000 people, and diagnosis rates are still lower than they could be because: Narcolepsy is a complex and often misunderstood disorder. […] Specialized tests are needed for a proper diagnosis.

• #1 Narcolepsy — The Path to Diagnosis | MyNarcolepsyTeam

  https://www.mynarcolepsyteam.com/resources/narcolepsy-the-path-to-diagnosis

  Narcolepsy is diagnosed through a combination of medical history evaluation and specific tests. Unfortunately, the process can be challenging and time-consuming. Many people wait years and see multiple doctors before being diagnosed. Advances in research and expanding awareness of narcolepsy are contributing to shorter diagnostic delays. […] There are several reasons a diagnosis of narcolepsy may be delayed. One factor is age of onset. A survey of 1,699 people with narcolepsy in the United States found that onset of symptoms before age 18 was a predictor of delayed diagnosis. […] Another factor in diagnostic delay is the existence of related conditions, such as sleep disorders, that might confuse or complicate the process. In the study mentioned above, researchers found that people with narcolepsy who also have obstructive sleep apnea experienced a delay of six to seven years before receiving a narcolepsy diagnosis.

• #1 Testing and Criteria for Narcolepsy Diagnosis

  https://www.psychiatrictimes.com/view/testing-and-criteria-for-narcolepsy-diagnosis

  But by the strictest definition of narcolepsy, you must have 2 sleep-onset REM periods during the MSLT [multiple sleep latency test] or you could have 1 in the MSLT and 1 in the PSG. […] The MSLTs can also be influenced once again if they’re on antidepressants or any REM-suppressant medications when they have the MSLT. It can make the MSLT negative. The other point I’d like to make is 1 MSLT does not exclude this diagnosis. Even having a negative MSLT at all does not exclude the diagnosis.

• #1 The Evolution of Narcolepsy Diagnosis – EnsoData

  https://www.ensodata.com/blog/the-evolution-of-narcolepsy-diagnosis/

  To treat cataplexy, physicians may prescribe a selective serotonin reuptake inhibitor (SSRI) or serotonin-norepinephrine reuptake inhibitor (SNRI), a tricyclic antidepressant, or a central nervous system depressant. […] Unfortunately, the test for hypocretin is a lumbar puncture which is painful and invasive, so it is not routinely done. Additionally, the HLA-DQB1 test is still „not readily used for diagnostic purposes,” meaning that not only do patients not have an accurate diagnosis up front, there are still challenges ahead for the novel blood testing research. […] Dr Drahos also indicated that the reliability of the MSLT is valuable for Type 1 diagnosis, but does not provide a reliable result for Type 2.

• #1 Testing for Narcolepsy | Sleep Medicine

  https://sleep.hms.harvard.edu/education-training/public-education/sleep-and-health-education-program/sleep-health-education-13

  Occasionally a doctor may recommend checking the level of hypocretin-1 in the spinal fluid. This test is very specific for narcolepsy, as hypocretin levels are low in almost no other condition. […] Although most people who have narcolepsy carry a genetic marker (HLA-DQB1*06:02) associated with the disorder, this gene is only a predisposing factor to developing narcolepsy. Testing for it will not confirm a diagnosis of the disorder.

• #1 Narcolepsy: Symptoms, Diagnosis, and Treatment Options

  https://brainfoundation.org.au/disorders/narcolepsy/

  Narcolepsy can be diagnosed on the basis of a history of typical episodes and the results of an overnight sleep study with a multiple sleep latency test. […] In many cases diagnosis is not made until many years after the onset of symptoms. […] Early diagnosis and treatment, however, are important to the physical and mental well-being of the sufferer, since studies have shown that even treated narcoleptic patients are often markedly psychosocially impaired in the area of work, leisure, interpersonal relations, and are more prone to accidents. […] The multiple sleep latency test is performed after an adequate nights sleep has been demonstrated clearly. […] The test consists of four 20-minute opportunities to nap, which are offered every two hours throughout the day.

• #1

  https://www.healthxchange.sg/wellness/sleeping-disorders/narcolepsy-diagnosis-treatment

  However, once they have been diagnosed and receive treatment, the situation can change dramatically for the better, he added. […] For example, patients can take 20 to 30 minutes of their hourlong lunch break for a nap in a quiet spot in the office, before getting back to their daily responsibilities. […] Besides power naps, medication can be prescribed to help patients stay alert during long meetings.

• #1 Narcolepsy — The Path to Diagnosis | MyNarcolepsyTeam

  https://www.mynarcolepsyteam.com/resources/narcolepsy-the-path-to-diagnosis

  Delayed diagnosis can have a negative impact on quality of life. In a study of 52 people with type 1 narcolepsy, participants reported less anxiety and reduced criticism from friends, family, and professional associates following their diagnosis. […] In 2014, the International Classification of Sleep Disorders (ICSD-3) introduced updated diagnostic criteria for narcolepsy, redefining its subtypes. What used to be known as narcolepsy with cataplexy was reclassified as type 1 narcolepsy. What was known as narcolepsy without cataplexy was reclassified as type 2 narcolepsy. […] For an official diagnosis of type 1 narcolepsy, a person must experience at least three months of excessive daytime sleepiness that cannot be explained by another health condition or medication use. Additionally, they must experience one of the following: Cataplexy and a positive multiple sleep latency test (MSLT) result or Low hypocretin levels, measured as less than one-third of normal levels in the cerebrospinal fluid.

• #1 Narcolepsy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/narcolepsy/symptoms-causes/syc-20375497

  There are only a few known risk factors for narcolepsy, including: Age. Narcolepsy typically begins between ages 10 and 30. Family history. Your risk of narcolepsy is 20 to 40 times higher if you have a close family member who has it. […] Narcolepsy can cause complications, such as: Misbeliefs about the condition. Narcolepsy can affect work, school or your personal life. Others might see people with narcolepsy as lazy or sluggish. Effects on intimate relationships. Intense feelings, such as anger or joy, can trigger cataplexy. This can cause people with narcolepsy to withdraw from emotional interactions. Physical harm. Falling asleep suddenly may result in injury. You’re at increased risk of a car accident if you fall asleep while driving. Your risk of cuts and burns is greater if you fall asleep while cooking. Obesity. People with narcolepsy are more likely to be overweight. Sometimes weight goes up quickly when symptoms start.

• #1 Understanding Narcolepsy: Types, Symptoms, and Diagnosis | M3 Wake Research

  https://wakeresearch.com/about-us/news-updates/understanding-narcolepsy-types-symptoms-and-diagnosis/

  Narcolepsy symptoms can vary widely among individuals, but certain signs are common and indicative of the disorder. Diagnosing narcolepsy involves a combination of medical history, sleep studies, and other specialized tests. […] Diagnosing narcolepsy typically involves a combination of medical evaluations and sleep studies. The process is designed to rule out other potential causes of excessive daytime sleepiness and to confirm the presence of narcolepsy. The field of sleep medicine plays a crucial role in diagnosing and managing narcolepsy and other sleep disorders. […] A thorough discussion of the patient’s sleep patterns, symptoms, and medical history, along with a general physical examination. Purpose: To identify signs and symptoms of narcolepsy and rule out other conditions that could cause excessive daytime sleepiness, such as sleep apnea or depression.

• #1 Early Diagnosis and Treatments for Narcolepsy | Lung & Sleep Specialists of North Texas

  https://lungandsleepspecialists.com/early-diagnosis-and-treatments-for-narcolepsy/

  Narcolepsy is a chronic sleep disorder that causes sudden daytime sleepiness along with muscle weakness. […] Early diagnosis and intervention are crucial, as the condition poses a high risk to a persons life especially when sleep attacks occur while driving or performing other potentially risky activities. […] A sleep medicine specialist may ask you to keep a sleep journal to track your sleeping habits and activities for about 1 to 2 weeks. […] Cataplexy is a key symptom in narcolepsy diagnosis, as this factor alone may eliminate other possible diseases. […] Your sleep specialist will likely recommend that you undergo a noninvasive sleep study (polysomnography), which records your brain, heart, eye, and muscle activity while asleep. […] From this, your doctor can take note if rapid eye movement (REM) sleep occurs early during your sleep, because this can indicate narcolepsy. […] Also, the multiple sleep latency test evaluates daytime sleepiness by measuring the time it takes for you to fall asleep.

• #2 Diagnosing Narcolepsy? — Narcolepsy Ireland

  https://narcolepsyireland.org/diagnosing-narcolepsy

  Narcolepsy is a disease which is highly incapacitating and which is poorly understood by both the public and most professionals. It is massively underdiagnosed or very often misdiagnosed. […] Latest research (2108) shows that the average time it takes for an adult to be diagnosed from the onset of symptoms is 6 years. For children the figure is approximately 2 years. […] The reality is that very little time has historically been spent on the subject of sleep disorders in the training programs for medical professionals. This accounts for the otherwise inexplicable number of misdiagnosed and often incorrectly medicated sufferers. […] Part of the mission of Narcolepsy Ireland is to work to reduce the current extremely long diagnosis time for narcolepsy by promoting awareness of narcolepsy at primary care level and by promoting and advocating for the provision by the HSE of adequate specialised medical facilities and personnel required to achieve early diagnosis.

• #2 Clinical features and diagnosis of narcolepsy in adults – UpToDate

  https://www.uptodate.com/contents/clinical-features-and-diagnosis-of-narcolepsy-in-adults

  Clinical features and diagnosis of narcolepsy in adults […] Two forms of narcolepsy are recognized: narcolepsy type 1 (NT1; narcolepsy with cataplexy), which is caused by orexin deficiency; and narcolepsy type 2 (NT2), which shares all features of NT1 except cataplexy and low orexin levels. Diagnosis of either NT1 or NT2 requires excluding other causes of daytime sleepiness, performing diagnostic sleep tests, and, in select cases, measuring orexin-A in cerebrospinal fluid (CSF). […] The epidemiology, clinical features, etiology, and diagnosis of narcolepsy are reviewed here. […] Narcolepsy type 2 (NT2) appears to be slightly less common than NT1, with prevalence estimates ranging from 20 to 34 per 100,000 people.

• #2 Narcolepsy type 2 – without cataplexy – Hypersomnia Foundation

  https://www.hypersomniafoundation.org/narcolepsy-type-2/

  Narcolepsy type 2 (NT2) is a long-lasting (chronic) hypersomnia sleep disorder of the brain (neurologic disorder). […] NT2 is similar to idiopathic hypersomnia (IH) in some ways and to narcolepsy type 1 (NT1) in other ways. Researchers don’t yet know the cause of NT2, but it isn’t caused by the same problem as NT1. […] The main symptom of NT2 is EDS that lasts for at least 3 months. Sleep patterns may also change, and if you have NT2, you may need 1 or more naps a day. […] You don’t need to have all of these symptoms to be diagnosed with NT2, but you’ll have at least some of them. […] Doctors will usually: Ask about your symptoms and medical history, sometimes using questionnaires. […] Confirm from your history that you’ve had daily EDS for at least 3 months. […] Do a complete physical exam and medical tests, including sleep studies, to make sure your EDS isn’t caused by something else.

• #2

  https://www.narcolepsylink.com/screening-and-diagnosis/diagnostic-process/

  Diagnosis of patients with suspected narcolepsy usually starts with the identification of excessive daytime sleepiness (EDS), or periods of an irrepressible need to sleep during the day. However, the establishment of EDS alone is not sufficient to make the diagnosis. Additional interviewing and testing are necessary. […] A complete clinical interview, including assessment for all 5 narcolepsy symptoms (CHESS: Cataplexy, Hallucinations, Excessive daytime sleepiness, Sleep paralysis, Sleep disruption), is important to the differential diagnosis and provides clinical context when evaluating the results of sleep laboratory testing. […] Sleep laboratory testing, consisting of overnight polysomnography (PSG) followed by a multiple sleep latency test (MSLT), should be performed if narcolepsy is suspected.

• #2 Narcolepsy: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/1188433-overview

  Narcolepsy is characterized by the classic tetrad of excessive daytime sleepiness (EDS), cataplexy, hypnagogic hallucinations, and sleep paralysis. […] Sleep studies are an essential part of the evaluation of patients with possible narcolepsy. The combination of an overnight polysomnogram (PSG) followed by a multiple sleep latency test (MSLT) showing sleep latency 8 minutes and two or more sleep-onset random eye movement periods (SOREMPs) strongly suggests narcolepsy while excluding other sleep disorders. […] Whenever possible, the diagnosis of narcolepsy should be confirmed by polysomnography (PSG) followed by MSLT; the MSLT should show sleep latency 8 minutes or less and two or more sleep-onset REM periods (SOREMPs). A SOREMP on PSG the night preceding the MSLT may replace one of the SOREMPs on the MSLT. This change in the SOREMP requirement means that clinicians need to pay closer attention to the early stage scoring of night PSGs. An alternative criterion for diagnosis is a CSF hypocretin level of 110 pg/mL or lower.

• #2 Getting a Diagnosis of Narcolepsy | Sleep Medicine

  https://sleep.hms.harvard.edu/education-training/public-education/sleep-and-health-education-program/sleep-health-education-12

  A sleep specialist will ask about symptoms of narcolepsy and other causes of sleepiness and perform a physical exam. If narcolepsy is suspected, the doctor will order sleep studies to help confirm the diagnosis. […] The first step in getting treated for narcolepsy is getting diagnosed. With proper diagnosis and treatment, the symptoms of narcolepsy usually improve substantially; left untreated, narcolepsy can seriously disrupt day-to-day life, resulting in challenges at school and work, impaired social life, and unsafe driving. […] If a doctor suspects narcolepsy, the next step will be to confirm the diagnosis with sleep studies.

• #2 Narcolepsy | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/narcolepsy

  To diagnose narcolepsy, a doctor will need to perform a clinical exam and take a detailed medical history. […] Two specialized tests, which can be performed in a sleep disorders clinic, are required to establish a diagnosis of narcolepsy: […] Polysomnogram (PSG or sleep study) This overnight test records brain activity, muscle movements, breathing, and eye movements during sleep. It helps determine if REM sleep happens too early in the sleep cycle and checks for other conditions like sleep apnea. […] Multiple sleep latency test (MSLT) This test measures how quickly a person falls asleep and whether they enter REM sleep. […] Sometimes, measuring the level of hypocretin in the fluid surrounding the brain and spinal cord can help with diagnosis. To perform this test, a doctor will take a sample of the cerebrospinal fluid using a lumbar puncture (also called a spinal tap) and measure the level of hypocretin-1.

• #2

• #2

  https://www.narcolepsylink.com/screening-and-diagnosis/screeners/

  During appointments, ask your patients to complete the Epworth Sleepiness Scale (ESS) and/or the Swiss Narcolepsy Scale (SNS) and use the results to help guide your discussion. […] This tool was created to screen individuals for narcolepsy with cataplexy. Ask your patient to answer these questions. […] Negative scores are suggestive of narcolepsy with cataplexy. […] These screening tools are not intended to make a narcolepsy diagnosis or replace complete evaluation by a sleep specialist. […] A sleep specialist can evaluate for symptoms and make a diagnosis. A narcolepsy diagnosis should be established with a clinical interview and nighttime polysomnography (PSG) followed by a multiple sleep latency test (MSLT).

• #2 Diagnosing Narcolepsy? — Narcolepsy Ireland

  https://narcolepsyireland.org/diagnosing-narcolepsy

  The first test is called the Epworth Sleepiness Scale (ESS). The ESS provides a simple standardised means of measuring general levels of sleepiness. […] The second test is called the Swiss Narcolepsy Scale (ENS). This test has proven to be effective in assisting in the diagnosis of narcolepsy with cataplexy (Type 1 narcolepsy). […] In order to help your doctors assess the extent of the problem it is very useful to be able to provide them with a written record of your sleep pattern. […] Quite apart from the general lack of awareness in the medical profession about narcolepsy there is also the very real problem that when the person who has narcolepsy attends their doctor there is almost never any physical sign of the disease for the doctor to see. […] Assuming that the GP or AE doctor accepts the fact that there is a sleep problem you will then be referred to a sleep specialist for full assessment.

• #2 How is Narcolepsy Diagnosed?

  https://www.wakeupnarcolepsy.org/about/diagnosis/

  How is Narcolepsy Diagnosed? […] Diagnosing Narcolepsy can be a time consuming and frustrating process. […] On average, it takes 10 years from onset of symptoms to an official diagnosis of Narcolepsy and visits to approximately six different specialists. […] Prior to diagnosis, it is not uncommon for people to be misdiagnosed with other sleep disorders, depression, psychiatric conditions, ADHD and even epilepsy. […] When you visit your doctor, he or she will ask for a detailed sleep history. […] If your doctor suspects Narcolepsy, he or she will most likely recommend sleep studies. […] These sleep studies usually consist of Polysomnogram (PSG), which is an overnight stay in a sleep laboratory, followed the next day by the Multiple Sleep Latency Test (MSLT). […] A PSG is a recording of brain waves, oxygen levels, eye movements, muscle tone and heart and breathing rates.

• #2 Diagnosis | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/sleep/narcolepsy/diagnosis.html

  If all the common symptoms of narcolepsy are present, diagnosing the disorder is fairly straightforward. However, if sleep attacks are isolated and there is only mild or no cataplexy, making a correct diagnosis is more challenging. It requires excluding carefully insufficient sleep (sleep deprivation), disturbed nocturnal sleep, insomnia, circadian rhythm disorders, sleep-related breathing (sleep apnea) disorders and psychiatric disorders. A general medical check up excluding anemia, hypothyroidism, heart or other general medical issues is essential. […] Stanford Sleep Specialists use two main tests to diagnose narcolepsy: the nocturnal polysomnogram and the multiple sleep latency test (MSLT). The polysomnogram continuously records brain waves during sleep, as well as a number of nerve and muscle functions during nighttime sleep. During the test, the narcoleptic will usually fall asleep rapidly, enter REM sleep quickly, and potentially awaken frequently during the night.

• #2 Narcolepsy: Diagnosis and management | Cleveland Clinic Journal of Medicine

  https://www.ccjm.org/content/85/12/959

  Narcolepsy should be considered in the differential diagnosis for chronic excessive daytime sleepiness, but this disorder has many mimics. […] The history should include specific questions about the hallmark features of narcolepsy, including cataplexy, sleep paralysis, and sleep-related hallucinations. […] The multiple sleep latency test consists of 4 to 5 nap opportunities at 2-hour intervals in a quiet dark room conducive to sleep, during which both sleep and REM latency are recorded. […] A diagnosis of narcolepsy requires a SOREMP in at least 2 of the naps in a multiple sleep latency test (or 1 nap if the shortened REM latency is seen during polysomnography). […] Narcolepsy type 1 is distinguished from type 2 by the presence of cataplexy. […] The diagnosis of narcolepsy type 1 requires excessive daytime sleepiness for at least 3 months that cannot be explained by another sleep disorder, medical or neurologic disorder, mental disorder, medication use, or substance use disorder, and at least 1 of the following: Cataplexy and mean sleep latency of 8 minutes or less with at least 2 SOREMPs on multiple sleep latency testing.

• #2 Common Sleep Disorders in Adults: Diagnosis and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/2022/0400/p397.html

  Narcolepsy is characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, and sleep hallucinations. Diagnosis is suggested by the history and can be confirmed with polysomnography and a multiple sleep latency test the following day. […] A diagnosis can be apparent from the clinical history, but confirmation should be obtained through PSG followed by a multiple sleep latency test the next day. The multiple sleep latency test consists of having the patient nap every two hours for 20 minutes over the course of a day while being monitored. People with narcolepsy generally fall asleep within eight minutes (compared with 15 minutes for the general population) and have REM sleep during at least two of the daytime naps (unaffected people usually experience REM sleep only at night).

• #2 Testing and Criteria for Narcolepsy Diagnosis

  https://www.psychiatrictimes.com/view/testing-and-criteria-for-narcolepsy-diagnosis

  But by the strictest definition of narcolepsy, you must have 2 sleep-onset REM periods during the MSLT [multiple sleep latency test] or you could have 1 in the MSLT and 1 in the PSG. […] The MSLTs can also be influenced once again if they’re on antidepressants or any REM-suppressant medications when they have the MSLT. It can make the MSLT negative. The other point I’d like to make is 1 MSLT does not exclude this diagnosis. Even having a negative MSLT at all does not exclude the diagnosis.

• #2

  https://www.narcolepsylink.com/screening-and-diagnosis/diagnostic-process/

  Assessment of cerebrospinal fluid (CSF) hypocretin-1 levels is another objective test that can confirm a narcolepsy type 1 diagnosis. […] Hypocretin deficiency in patients with excessive daytime sleepiness is considered diagnostic for narcolepsy type 1 in the ICSD-3 and for narcolepsy in the DSM-5. […] Hypocretin deficiency is generally defined as CSF hypocretin-1 levels 110 pg/mL or 1/3 (1/3 in DSM-5) of mean values obtained using the same assay in healthy subjects.

• #2 Testing for Narcolepsy | Sleep Medicine

  https://sleep.hms.harvard.edu/education-training/public-education/sleep-and-health-education-program/sleep-health-education-13

  Occasionally a doctor may recommend checking the level of hypocretin-1 in the spinal fluid. This test is very specific for narcolepsy, as hypocretin levels are low in almost no other condition. […] Although most people who have narcolepsy carry a genetic marker (HLA-DQB1*06:02) associated with the disorder, this gene is only a predisposing factor to developing narcolepsy. Testing for it will not confirm a diagnosis of the disorder.

• #2 How is Narcolepsy Diagnosed?

  https://www.wakeupnarcolepsy.org/about/diagnosis/

  During the PSG, a technician places multiple sensors, which are connected to a computer, on the patient’s head, neck, chest and legs. […] Additionally, a video records body movement, which together with the recoded brain activity, helps diagnose Narcolepsy. […] Conducted after a PSG, the MSLT is a day time sleep study to assess the degree of sleepiness during the day and how quickly REM sleep begins. […] The MSLT involves four to five naps scheduled at 2-hour intervals beginning a couple of hours after you wake up in the morning. […] Individuals who fall asleep quickly and enter REM sleep during naps is one indication of Narcolepsy. […] Human Leukocyte Antigens (HLA) Testing Many individuals with Narcolepsy have a genetic marker, HLA-DQB1*0602, related to the immune system. […] While testing for this marker can be an informative step, it is not a definitive test for Narcolepsy, as approximately 20% of the entire population carries this gene.

• #2 Narcolepsy Research – FAQs  | Center for Narcolepsy | Stanford Medicine

  https://med.stanford.edu/narcolepsy/faq1.html

  All patients who have undetectable hypocretin levels in their cerebrospinal fluid (CSF) and no major neurological problems have narcolepsy. […] No single test will however ever be 100% specific; for example, some patients with typical symptoms have been shown to have normal CSG hypocretin levels that only decreased later. […] Recent studies have shown that the hypocretin-containing cells are missing in the brain of narcoleptic patients. […] The best HLA marker for type 1 narcolepsy is HLA-DQB1*0602. […] This marker is more specific and sensitive than the old marker HLA-DR2, especially in African Americans. […] The HLA subtypes are only predisposing factors but are not sufficient by themselves to cause narcolepsy. […] The treatment for these diseases is a combination of behavioral changes and medications and depends on the cause.

• #2 Narcolepsy: Diagnosis and management | Cleveland Clinic Journal of Medicine

  https://www.ccjm.org/content/85/12/959

  The diagnosis of narcolepsy type 2 requires excessive daytime sleepiness for at least 3 months that cannot be explained by another sleep disorder, medical or neurological disorder, mental disorder, medication use, or substance use disorder, plus: Mean sleep latency of 8 minutes or less with at least 2 SOREMPs on multiple sleep latency testing.

• #2 Narcolepsy — The Path to Diagnosis | MyNarcolepsyTeam

  https://www.mynarcolepsyteam.com/resources/narcolepsy-the-path-to-diagnosis

  Delayed diagnosis can have a negative impact on quality of life. In a study of 52 people with type 1 narcolepsy, participants reported less anxiety and reduced criticism from friends, family, and professional associates following their diagnosis. […] In 2014, the International Classification of Sleep Disorders (ICSD-3) introduced updated diagnostic criteria for narcolepsy, redefining its subtypes. What used to be known as narcolepsy with cataplexy was reclassified as type 1 narcolepsy. What was known as narcolepsy without cataplexy was reclassified as type 2 narcolepsy. […] For an official diagnosis of type 1 narcolepsy, a person must experience at least three months of excessive daytime sleepiness that cannot be explained by another health condition or medication use. Additionally, they must experience one of the following: Cataplexy and a positive multiple sleep latency test (MSLT) result or Low hypocretin levels, measured as less than one-third of normal levels in the cerebrospinal fluid.

• #2 The Diagnosis and Management of Narcolepsy | Consultant360

  https://www.consultant360.com/articles/diagnosis-and-management-narcolepsy

  Narcolepsy is a chronic neurological sleep disorder that is characterized by excessive sleepiness and can have negative effects on daytime activities and quality of life. […] In recent years, the medical community has developed a greater understanding of the clinical features and pathophysiological basis for narcolepsy, but the disorder remains underrecognized and underdiagnosed. […] A diagnosis of narcolepsy is established by subjective assessment with a sleep history and objective measurement with sleep testing. […] The multiple sleep latency test (MSLT) is an objective test that is indicated in the diagnosis of narcolepsy. […] The MSLT is positive if the following 2 criteria are met: Mean sleep latency of all naps is 8 minutes. 2 or more sleep-onset REM periods are present. […] Since a deficiency in hypocretin often underlies the development of narcolepsy, consideration could also be given to measuring hypocretin in the cerebrospinal fluid (CSF) as a diagnostic test for narcolepsy. Low or undetectable CSF hypocretin is diagnostic for narcolepsy. […] HLA typing is another consideration in the workup for narcolepsy. […] Based on the results of the complete diagnostic workup, patients are classified as either narcolepsy type 1 or 2.

• #2 Narcolepsy — The Path to Diagnosis | MyNarcolepsyTeam

  https://www.mynarcolepsyteam.com/resources/narcolepsy-the-path-to-diagnosis

  A person must meet the following criteria to be officially diagnosed with type 2 narcolepsy: At least three months of excessive daytime sleepiness that cannot be explained by another health condition or medication use and A positive MSLT result. […] Secondary narcolepsy is a rare type of narcolepsy caused by an injury to the hypothalamus, the region at the base of the brain that regulates sleep. Diagnosis typically involves identifying these symptoms, a positive MSLT result, and sometimes an MRI to confirm hypothalamic damage. […] A polysomnogram (PSG) is an overnight sleep study used to diagnose narcolepsy and other sleep disorders, such as sleep apnea. […] An MSLT assesses excessive daytime sleepiness and usually follows a PSG. A positive MSLT result is a key diagnostic criterion for both type 1 and type 2 narcolepsy.

• #2 Resources for Diagnosing Narcolepsy | Know Narcolespy HCP

  https://knownarcolepsyhcp.com/resources/diagnosis

  Because the circadian clock strongly gates the propensity of REM sleep, narcolepsy type 2 should not be diagnosed in a shift worker without prior re-entrainment to a normal schedule […] If cataplexy develops later, the disorder should be reclassified as narcolepsy type 1 […] If the CSF hypocretin concentration is tested at a later stage and found to be either 110 pg/mL (when using a Stanford reference sample) or 1/3 of mean values obtained in normal subjects with the same standardized assay, the disorder should be reclassified as narcolepsy type 1.

• #2 Narcolepsy – Wikipedia

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

  The concentration of orexin-A neuropeptides in the cerebrospinal fluid of narcoleptic individuals is usually very low […] Diagnostic method Based on the symptoms and sleep studies […] Diagnosis is typically based on the symptoms and sleep studies, after excluding alternative causes of EDS. EDS can also be caused by other sleep disorders such as insufficient sleep syndrome, sleep apnea, major depressive disorder, anemia, heart failure, and drinking alcohol. […] The third edition of the International Classification of Sleep Disorders (ICSD-3) differentiates between narcolepsy with cataplexy (type 1) and narcolepsy without cataplexy (type 2), while the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) uses the diagnosis of narcolepsy to refer to type 1 narcolepsy only.

• #2 Narcolepsy Differential Diagnoses

  https://emedicine.medscape.com/article/1188433-differential

  Idiopathic hypersomnia is similar in presentation to narcolepsy, but patients with this condition have no sleep-onset rapid eye movement (REM) period, and naps are unrefreshing. […] Differentiation of these two disorders can provide valuable insight for therapy. […] The role of cerebrospinal fluid hypocretin measurement in the diagnosis of narcolepsy and other hypersomnias. […] The ICSD-3 and DSM-5 guidelines for diagnosing narcolepsy: clinical relevance and practicality.

• #2 Diagnosis of Narcolepsy

  https://www.neurologylive.com/view/diagnosis-of-narcolepsy

  ADHD [attention-deficit/hyperactivity disorder] would be a common one. […] Oftentimes, the cataplexy could be misdiagnosed as seizures or atonic seizures. […] And it is, in fact, a pediatric condition, isnt it? […] And interestingly, she was placed on an antidepressant, which actually worked for the cataplexy but for the wrong reason. […] And there is almost a 10-year delay from the onset of the disease to when someone eventually makes the correct diagnosis. […] In fact, obstructive sleep apnea can present with symptoms similar to narcolepsy. […] 10% to 60% of patients who have treated sleep apnea are still very, very sleepy, to the point of sometimes having an underlying comorbid narcolepsy type 1 or type 2—which often complicates the picture.

• #2 Missed diagnosis of longstanding narcolepsy | JPN

  https://www.jpn.ca/content/48/6/E472

  Narcolepsy is often misdiagnosed because symptoms may mimic those of other neuropsychiatric disorders, delaying diagnosis and treatment. […] Psychiatric clinicians should consider narcolepsy, particularly in patients reporting excessive daytime sleepiness and uncontrolled depression or ADHD. […] For this patient, the relationship between the psychiatrist and sleep specialist allowed for efficient identification of narcolepsy and treatment optimization with low-sodium oxybate. […] Psychiatric clinicians awareness of narcolepsy symptoms and use of key probing questions can improve disease outcomes with tremendous impact on quality of life for patients and, potentially, their families.

• #2 Risk factors & long delay pre narcolepsy diagnosis | NSS

  https://www.dovepress.com/idling-for-decades-a-european-study-on-risk-factors-associated-with-th-peer-reviewed-fulltext-article-NSS

  The long diagnostic delay in narcolepsy may lead to a substantial medical and socioeconomic burden caused by misdiagnosis, inappropriate medication exposure, multiple clinical visits, reductions in patients quality of life and productivity, poor school performance, increased unemployment, absenteeism, and adverse impact on patients family, etc. […] Shortening the delay of NT1 diagnosis is one of the major goals of awareness campaigns and efforts invested in narcolepsy medicine/research in the past decades. […] Our study reports that the diagnostic delay of NT1 has not been shortened in the past decades in European countries, in spite of the progression of narcolepsy research and investment in narcolepsy awareness campaign by societies and industries.

• #2 Understanding Narcolepsy: Types, Symptoms, and Diagnosis | M3 Wake Research

  https://wakeresearch.com/about-us/news-updates/understanding-narcolepsy-types-symptoms-and-diagnosis/

  An overnight sleep study that monitors brain activity, eye movements, muscle activity, heart rate, and breathing. Usage: Helps diagnose sleep disorders and rule out other causes of excessive daytime sleepiness by examining sleep stages and patterns. […] A daytime nap study conducted the day after a PSG. It measures how quickly a person falls asleep in a quiet environment and whether they enter REM sleep. Usage: Narcolepsy patients typically fall asleep in less than 8 minutes and enter REM sleep during at least two of the five naps, indicating the presence of narcolepsy. […] A lumbar puncture (spinal tap) to analyze cerebrospinal fluid (CSF) and measure hypocretin levels. Usage: Low hypocretin levels strongly support a diagnosis of Type 1 narcolepsy. This test is less commonly used due to its invasive nature but can be crucial in certain cases. […] A self-administered questionnaire that assesses the severity of daytime sleepiness by asking about the likelihood of dozing off in various situations. Usage: Helps quantify the impact of excessive daytime sleepiness on daily life and supports further diagnostic testing.

• #2 Understanding Narcolepsy: Symptoms, Diagnosis, and Treatment Options

  https://www.chattsleep.com/understanding-narcolepsy-symptoms-diagnosis-and-treatment-options

  While there is no cure for narcolepsy, various treatment approaches can significantly improve the daily functioning and quality of life for those affected: […] Medication Management: Prescription medications, such as stimulants for excessive daytime sleepiness or antidepressants for cataplexy, sleep paralysis, and hallucinations, can target specific narcolepsy symptoms. […] Cognitive Behavioral Therapy (CBT): CBT techniques can help individuals with narcolepsy modify their thoughts, beliefs, and behaviors related to sleep, ultimately promoting better sleep hygiene and coping strategies. […] Lifestyle Modifications: Establishing a consistent sleep schedule, taking scheduled naps, engaging in regular exercise, and maintaining a healthy diet can support overall sleep health and symptom management.

• #3 Risk factors & long delay pre narcolepsy diagnosis | NSS

  https://www.dovepress.com/idling-for-decades-a-european-study-on-risk-factors-associated-with-th-peer-reviewed-fulltext-article-NSS

  Narcolepsy type-1 (NT1) is a rare chronic neurological sleep disorder with excessive daytime sleepiness (EDS) as usual first and cataplexy as pathognomonic symptom. Shortening the NT1 diagnostic delay is the key to reduce disease burden and related low quality of life. Here we investigated the changes of diagnostic delay over the diagnostic years (1990 2018) and the factors associated with the delay in Europe. […] The mean and median diagnostic delay was 9.7 11.5 and 5.3 (interquartile range: 1.7 13.2 years) years, respectively. […] Younger age at cataplexy onset, longer interval between EDS and cataplexy onsets, lower cataplexy frequency, shorter duration of irresistible daytime sleep, lower daytime REM sleep propensity, and being female are associated with longer diagnostic delay. […] Our findings contrast the results of previous studies reporting shorter delay over time which is confounded by calendar year, because they characterized the changes in diagnostic delay over the symptom onset year. Our study indicates that new strategies such as increasing media attention/awareness and developing new biomarkers are needed to better detect EDS, cataplexy, and changes of nocturnal sleep in narcolepsy, in order to shorten the diagnostic interval.

• #3 DNA Narcolepsy Risk Test | Genex Diagnostics

  https://www.genexdiagnostics.com/dna-narcolepsy-test/

  DNA Narcolepsy Risk Test […] If you experience excessive daytime sleepiness or find yourself unintentionally dozing off, it could be a sign of narcolepsy. Narcolepsy is a sleep disorder that disrupts the normal sleep-wake cycle, making it difficult to maintain alertness. This simple DNA test can help uncover the cause of your excessive daytime sleepiness. […] This genetic analysis detects the HLA-DQB1*06:02 allele associated with narcolepsy. It is a useful tool, in conjunction with other clinical symptoms, for an accurate narcolepsy diagnosis. […] Approximately 90-99% of people with narcolepsy carry a variant of the HLA-DQB1 gene known as the HLA-DQB1*06:02 allele. […] Symptoms of Narcolepsy include excessive daytime sleepiness (100% of affected individuals), cataplexy a sudden loss of voluntary muscle tone (70% of affected individuals), sleep paralysis and/or vivid hallucinations (10 to 20% of affected individuals), microsleep (sleep episodes that only last a few seconds), nighttime wakefulness, atonia (loss of muscle strength), involuntary leg muscle contractions, and rapid entry into REM sleep.

• #3 Multiple Sleep Latency Test (MSLT) | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/sleep/narcolepsy/diagnosis/multiple-sleep-latency-test.html

  In the multiple sleep latency test (MSLT), a person is given 4-5 opportunities to sleep every two hours during normal wake times. The specialist uses the test to measure the extent of daytime sleepiness (how fast the patient falls asleep in each nap, also called sleep latency), and also how quickly REM sleep begins. A positive MSLT is obtained when the patient falls asleep with a mean sleep latency below 8 minutes in the naps, and had at least no more than 1 nap (for idiopathic hypersomnia) or 2 naps (for narcolepsy diagnosis) where REM sleep was reached.

• #3 Resources for Diagnosing Narcolepsy | Know Narcolespy HCP

  https://knownarcolepsyhcp.com/resources/diagnosis

  ICD-10 codes ICD-10 codes ICSD-3-TR criteria ICD-10 codes ICSD-3-TR criteria […] Criteria A-C must be met […] The patient has daily periods of irrepressible need to sleep or daytime lapses into drowsiness or sleep […] The presence of one or both of the following: […] CSF hypocretin-1 concentration, measured by radioimmunoassay, is either 110 pg/mL (using a Stanford reference sample) or 1/3 of mean values obtained in normal subjects with the same standardized assay […] The symptoms and signs are not better explained by chronic insufficient sleep, a circadian rhythm sleep-wake disorder or other current sleep disorder, mental disorder, or medication/substance use or withdrawal […] Criteria A-E must be met […] The patient has daily periods of irrepressible need to sleep or daytime lapses into drowsiness or sleep occurring for at least three months

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