Materiały źródłowe

• #1 Placental Abruption (Abruptio Placentae) – Gynecology and Obstetrics – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/gynecology-and-obstetrics/antenatal-complications/placental-abruption-abruptio-placentae

  Placental abruption (abruptio placentae) is premature separation of the placenta from the uterus, usually after 20 weeks gestation. It can be an obstetric emergency. […] The source of bleeding in placental abruption is maternal. […] Placental abruption may involve any degree of placental separation, from a few millimeters to complete detachment. Separation can be acute or chronic. Separation results in bleeding into the decidua basalis behind the placenta (retroplacentally). Most often, etiology is unknown. […] The source of bleeding in placental abruption is maternal. However, the partial or complete separation of the placenta from the uterine wall compromises fetal oxygen exchange. […] Abnormal results of coagulation blood tests or fetal heart rate monitoring support the diagnosis. […] Complications of placental abruption (eg, shock, DIC) are managed with aggressive replacement of blood and blood products.

• #1 Acute placental abruption: Pathophysiology, clinical features, diagnosis, and consequences – UpToDate

  https://www.uptodate.com/contents/placental-abruption-pathophysiology-clinical-features-diagnosis-and-consequences?sectionName=DIFFERENTIAL%

  Placental abruption is typically defined as the premature separation of the placenta from the decidua at or after 20 weeks gestation. The immediate cause of the premature placental separation is rupture of maternal vessels in the decidua basalis. Rarely, the bleeding originates from the fetal-placental vessels. The accumulating blood splits the decidua, separating off a thin layer of decidua with its placental attachment. The ruptured maternal vessel may be an artery or a vein.

• #1 Acute placental abruption: Pathophysiology, clinical features, diagnosis, and consequences – UpToDate

  https://www.uptodate.com/contents/acute-placental-abruption-pathophysiology-clinical-features-diagnosis-and-consequences

  Placental abruption is typically defined as the premature separation of the placenta from the decidua at or after 20 weeks gestation. The immediate cause of the premature placental separation is rupture of maternal vessels in the decidua basalis. Rarely, the bleeding originates from the fetal-placental vessels. The accumulating blood splits the decidua, separating off a thin layer of decidua with its placental attachment. […] The ruptured maternal vessel may be an artery or a vein.

• #1 Abruptio Placentae: Practice Essentials, Etiology, Epidemiology

  https://emedicine.medscape.com/article/252810-overview

  Abruptio placentae is defined as the premature separation of the placenta from the uterus. Patients with abruptio placentae, also called placental abruption, typically present with bleeding, uterine contractions, and fetal distress. A significant cause of third-trimester bleeding associated with fetal and maternal morbidity and mortality, placental abruption must be considered whenever bleeding is encountered in the second half of pregnancy. […] Hemorrhage into the decidua basalis occurs as the placenta separates from the uterus. Vaginal bleeding usually follows, although the presence of a concealed hemorrhage in which the blood pools behind the placenta is possible. […] Hematoma formation further separates the placenta from the uterine wall, causing compression of these structures and compromise of blood supply to the fetus. Retroplacental blood may penetrate through the thickness of the uterine wall into the peritoneal cavity, a phenomenon known as Couvelaire uterus. The myometrium in this area becomes weakened and may rupture with increased intrauterine pressure during contractions. A myometrium rupture immediately leads to a life-threatening obstetric emergency.

• #1 Placental Abruption | Obgyn Key

  https://obgynkey.com/placental-abruption-2/

  Placental abruption is an important cause of bleeding in the second half of pregnancy and is associated with greatly increased risks of stillbirth, neonatal death, preterm delivery, and long-term neurodevelopmental disability. […] The exact etiology of placental abruption is unknown. Clearly, abruption may result from a number of different etiologies and pathways. […] The mechanism of an abruption following acute trauma or rapid uterine decompression is different from that which follows a long-standing process such as preeclampsia or uteroplacental insufficiency, the latter being one of the clinical manifestations of ischemic placental disease. […] There is an increasing body of evidence that abruption is often the end result of long-standing defective placentation, as it is associated with abnormal trophoblastic invasion and remodeling of the spiral arteries.

• #1 Placental Abruption | GLOWM

  https://www.glowm.com/section-view/heading/Placental%20Abruption/item/122

  Acute factors include maternal trauma, decompression of the overdistended uterus, and perhaps the acute vascular changes secondary to cocaine abuse. […] The concept of ischemic placental disease will be further discussed later in this chapter. […] We have introduced the concept of ischemic placental disease, under which we include the 3 clinical conditions of preeclampsia, small for gestational age births, and placental abruption. […] It may be that these conditions may be different clinical manifestations of a common etiology (defective/inadequate placentation). […] The pathophysiology of ischemic placental disease involves impaired trophoblastic invasion of maternal spiral arteries, followed by placental hypoxia, release of thrombin/inflammatory factors, and then endothelial cell activation and damage. […] Therefore, placental abruption appears to be one of the possible clinical manifestations of ischemic placental disease.

• #1 Molecular Changes on Maternal–Fetal Interface in Placental Abruption—A Systematic Review

  https://www.mdpi.com/1422-0067/22/12/6612

  According to the available literature, the pathophysiological mechanisms leading to the occurrence of such complications include uteroplacental ischemia (the placenta becoming underperfused) and placental insufficiency beginning during placental implantation. […] In the majority of cases, placental diseases are related to the abnormalities of the vascular and immune system. […] The disruptions lead to necrosis, inflammation, vascular problems and, ultimately, to placental abruption. […] It is currently known that it is the temporary activation of the maternal immune system in which unique suppression is maintained throughout pregnancy. […] The immunological alterations occurring in placental abruption remain mostly unknown, yet some of them have already been established. […] The disruption of the NKs and T cell balance may result in preterm placental abruption.

• #1 Take a look at the Recent articles

  https://www.oatext.com/Preterm-placental-abruption-Tocolytic-therapy-regarded-as-a-poor-neonatal-prognostic-factor.php

  Aim: To elucidate factors associated with a poor neonatal prognosis in preterm placental abruption. […] Administration of tocolytic agents is a possible factor in a poor neonatal prognosis in preterm placental abruption. This finding may suggest that differential diagnosis could improve the prognosis. […] Epidemiologic investigations have revealed many risk factors for onset of placental abruption. They include primiparity, high maternal age at primiparity, male fetus, smoking habit, pregnancy-induced hypertension (PIH), threatened premature labor, chorioamnionitis, fetal growth restriction, and polyhydramnios. […] Pathologically, this disorder can be viewed as occurring due to failure of adhesion of the placental villi and uterine decidua for some reason. Ananth et al. hypothesized that there were two pathways underlying the mechanism by which adhesion fails. They suggested the presence of an acute process seen in the second trimester and a chronic process observed in the late third trimester. It is understood that inflammatory cytokines are involved in the former, while the latter is associated with capillary endothelial injury.

• #1 Epidemiology, Risk Factors, and Perinatal Outcomes of Placental Abruption—Detailed Annual Data and Clinical Perspectives from Polish Tertiary Center

  https://www.mdpi.com/1660-4601/19/9/5148

  PA also influences maternal long-term prognosis, morbidity, and mortality. […] The calculated PA incidence of 0.7% is consistent with the literature data. […] The difference between the incidence of hypertensive disorders of pregnancy in the PA group and the control group was not significant. […] Other maternal morbidities also seem relevant to PA incidence. […] The multiplicity of the conditions connected with PA underlines the complexity of PA etiopathogenesis, with its numerous features remaining obscure. […] It is worth mentioning illicit drug use, which was a risk factor that could not be evaluated in our study. […] The management of PA is still challenging, even for the most experienced obstetricians and perinatologists. […] PA is suspected to be the visible endpoint of processes beginning in the early stage of pregnancy rather than an emergency obstetric complication itself.

• #1 Placental Abruption | Obgyn Key

  https://obgynkey.com/placental-abruption-2/

  A study by Ananth and colleagues found that a first-trimester pregnancy-associated plasma protein A less than the 5th percentile was associated with an increased risk of abruption. […] Although in the past abruption was regarded as an acute event, there is now an ample body of evidence that suggests that the pathophysiological processes that lead to most abruptions have their origins early in pregnancy.

• #1 Placental Abruption: Symptoms, Causes, Treatment, Types, Ultrasound Diagnosis, vs Previa Definition — EZmed

  https://www.ezmedlearning.com/blog/placental-abruption-symptoms-causes-treatment-types

  Placental abruption occurs when a normally situated placenta partly or completely separates from the wall of the uterus in a viable fetus (after 24 weeks gestation) and prior to the delivery of the fetus. […] The process of placental abruption begins with uterine vasospasm followed by relaxation, and subsequent venous engorgement and arterial rupture (decidual arteries). […] A hematoma forms which may initially be concealed but with expansion of the hematoma, progressive placental separation occurs. […] The infiltration of blood between muscle fibers causes a tonic contraction which makes the uterus woody hard and tender. […] The increase in intra-uterine pressure compromises the placental circulation, adding to the fetal hypoxia which has already started due to the placental separation.

• #1 Treatment of placental abruption following blunt abdominal trauma: a case report

  https://jtraumainj.org/journal/view.php?number=1331

  Placental abruption is a severe traumatic event that can occur during pregnancy. It occurs in 1% of all pregnancies and is one of the most frequent causes of perinatal and maternal morbidity. […] The leading cause of placental abruption is not clear; however, numerous risk factors have been identified such as maternal hypertension, premature rupture of membranes, oligohydramnios, or trauma. […] Placental injury is directly associated with placental abruption. In contrast to the placenta, the uterus can change shape in response to forces on the abdomen due to its higher elasticity. Therefore, a shearing force can partially or completely disrupt the attachment between the placenta and decidua, and massive abruption can result in maternal morbidity and fetal death due to the loss of placental function.

• #1 Placental abruption | Better Health Channel

  https://www.betterhealth.vic.gov.au/health/healthyliving/placental-abruption

  Placental abruption means the placenta has detached from the wall of the uterus, either partly or totally. This can cause bleeding in the mother and may interfere with the babys supply of oxygen and nutrients. […] The cause is unknown in most cases, but risk factors may include maternal high blood pressure, abdominal trauma and substance misuse. […] In most cases, doctors dont know the exact cause or causes of placental abruption. It is thought that an abnormal blood supply in the uterus or placenta may play a role, but the cause of the suspected abnormality isnt clear. […] Some of the known causes of placental abruption include abdominal trauma, which may tear the placenta from the wall of the uterus. […] Uterine decompression is a sudden loss of amniotic fluid from the uterus, which can suck the placenta from the uterus wall.

• #1 Treatment of placental abruption following blunt abdominal trauma: a case report

  https://jtraumainj.org/journal/view.php?number=1331

  Placental abruption is clinically diagnosed and should be suspected when a patient presents with vaginal bleeding or abdominal pain after trauma. […] Although ultrasonography is insensitive to placental abruption, echogenic amniotic fluid and retroplacental hemorrhage are signs of abruption. […] Placental abruption mostly occurs within 4 to 9 hours after a traumatic event, with almost all cases occurring within 24 hours of injury. Even with minor trauma, abruption can occur, and it is important to maintain a high level of suspicion to detect the abruption.

• #1 Placental abruption – Wikipedia

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

  Placental abruption is when the placenta separates early from the uterus, in other words separates before childbirth. It occurs most commonly around 25 weeks of pregnancy. The cause of placental abruption is not entirely clear. Risk factors include smoking, pre-eclampsia, prior abruption (most important and predictive risk factor), trauma during pregnancy, cocaine use, and previous cesarean section. In the vast majority of cases, placental abruption is caused by the maternal vessels tearing away from the decidua basalis, not the fetal vessels. The underlying cause is often unknown. A small number of abruptions are caused by trauma that stretches the uterus. Because the placenta is less elastic than the uterus, it tears away when the uterine tissue stretches suddenly. When anatomical risk factors are present, the placenta does not attach in a place that provides adequate support, and it may not develop appropriately or be separated as it grows. Cocaine use during the third trimester has a 10% chance of causing abruption. Though the exact mechanism is not known, cocaine and tobacco cause systemic vasoconstriction, which can severely restrict the placental blood supply (hypoperfusion and ischemia), or otherwise disrupt the vasculature of the placenta, causing tissue necrosis, bleeding, and therefore abruption. In most cases, placental disease and abnormalities of the spiral arteries develop throughout the pregnancy and lead to necrosis, inflammation, vascular problems, and ultimately, abruption. Because of this, most abruptions are caused by bleeding from the arterial supply, not the venous supply. The accumulating blood pushes between the layers of the decidua, pushing the uterine wall and placenta apart. When the placenta is separated, it is unable to exchange waste, nutrients, and oxygen, a necessary function for the fetus’s survival. The fetus dies when it no longer receives enough oxygen and nutrients to survive.

• #1 Abruptio Placentae: Practice Essentials, Etiology, Epidemiology

  https://emedicine.medscape.com/article/252810-overview

  The primary cause of placental abruption is usually unknown, but multiple risk factors have been identified. […] Risk factors in abruptio placentae include the following: Maternal hypertension – Most common cause of abruption, occurring in approximately 44% of all cases. […] The hypertension and increased levels of catecholamines caused by cocaine abuse are thought to be responsible for a vasospasm in the uterine blood vessels that causes placental separation and abruption. […] Abdominal trauma is a major risk factor for placental abruption. […] The frequency of abruptio placentae in the United States is approximately 1%, and a severe abruption leading to fetal death occurs in 0.12% of pregnancies (1:830). […] If the bleeding continues, fetal and maternal distress may develop. Fetal and maternal death may occur if appropriate interventions are not undertaken.

• #1 Placental abruption | Better Health Channel

  https://www.betterhealth.vic.gov.au/health/healthyliving/placental-abruption

  While the exact cause in most cases is unknown, certain factors make a pregnancy more susceptible to placental abruption. […] High blood pressure increases the risk of abnormal bleeding between the placenta and the wall of the uterus. […] In nearly half of placenta abruption cases (44%), the pregnant mother is hypertensive. […] Complications in severe cases can include decreased oxygen to the baby, which could lead to brain damage, stillbirth, and maternal blood loss leading to shock. […] All cases of suspected placental abruption, regardless of severity, should be closely monitored to protect the health and safety of the mother and child. […] Treatment depends on the severity of the condition but may include immediate delivery in severe cases.

• #1 Molecular Changes on Maternal–Fetal Interface in Placental Abruption—A Systematic Review

  https://www.mdpi.com/1422-0067/22/12/6612

  Placental abruption is the separation of the placenta from the lining of the uterus before childbirth. […] The aim of this review was to examine the current state of knowledge concerning the molecular changes on the maternal–fetal interface occurring in placental abruption. […] The available evidence indicates that the disruption of the immunological processes on the maternal–fetal interface plays a crucial role in the pathophysiology of placental abruption. […] The features of chronic non-infectious inflammation and augmented immunological cytotoxic response were found to be present in placental abruption samples in the reviewed studies. […] The etiopathogenesis of placental abruption is multifactorial. […] According to the current concept of ischemic placental disease, placental abruption is one of the manifestations of impaired placental function comprising PE and FGR.

• #1 Molecular Changes on Maternal–Fetal Interface in Placental Abruption—A Systematic Review

  https://www.mdpi.com/1422-0067/22/12/6612

  A high proportion of experts claimed that placental abruption was particularly related to the accumulation of cytotoxic response resulting from the insufficient immunosuppressive activity of the decidua. […] Recent studies also suggested an important role of the cytosolic multiprotein oligomers responsible for the activation of inflammatory responses. […] The obtained data will facilitate a better understanding of the phenomenon and the improvement of diagnostic and therapeutic opportunities for patients at risk of developing placental abruption.

• #1 Placental Abruption – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK482335/

  Placental abruption occurs when there is a compromise of the vascular structures supporting the placenta. […] Disruption of the vascular network may occur when the vascular structures are compromised because of hypertension or substance use or by conditions that cause stretching of the uterus. […] Placental abruption occurs when the maternal vessels tear away from the placenta, and bleeding occurs between the uterine lining and the maternal side of the placenta. […] When accumulating blood causes separation of the placenta from the maternal vascular network, these vital functions of the placenta are interrupted. […] The clinical implications of a placental abruption vary based on the extent and location of the separation. […] A classification of 0 or 1 is usually associated with partial, marginal separation, whereas a classification of 2 or 3 is associated with complete or central separation. […] Placental abruption is a serious pregnancy complication and is best managed by an interprofessional team of healthcare professionals, including an obstetrician, radiologist, hematologist, obstetric nurse, and intensivist.

• #1 Abruptio Placentae: Practice Essentials, Etiology, Epidemiology

  https://emedicine.medscape.com/article/252810-overview

  The severity of fetal distress correlates with the degree of placental separation. In near-complete or complete abruption, fetal death is inevitable unless an immediate cesarian delivery is performed. […] Maternal morbidity may include the following: Transfusion-related morbidity, Classic cesarean delivery with need for repeat cesarean deliveries, Hysterectomy. […] Disseminated intravascular coagulation (DIC) may occur as a sequela of placental abruption. Patients with a placental abruption are at higher risk of developing a coagulopathic state than those with placenta previa. […] The risk of recurrence of abruptio placentae is reportedly 4-12%. If the patient has abruptio placentae in 2 consecutive pregnancies, the risk of recurrence rises to 25%.

• #1 DIC in Pregnancy – Pathophysiology, Clinical Characteristics, Di | JBM

  https://www.dovepress.com/dic-in-pregnancy–pathophysiology-clinical-characteristics-diagnostic–peer-reviewed-fulltext-article-JBM

  Placental abruption seems to be the underlying mechanism for the development of DIC when it is associated with other obstetrical complications including fetal death and HELLP syndrome. […] Thus, pregnancy is a time point in women’s life in which she is at increased risk to develop DIC as a result from different complications of pregnancy, and especially placental abruption. Prompt attention and treatment of underlying obstetrical disorders and rapid diagnosis and management of placental abruption can reduce the risk for DIC substantially. […] Excessive and uncontrolled in vivo thrombin generation is a key to the development of DIC. […] In obstetrical disorders, the much-enhanced coagulation process could lead to microvascular clots which impair the appropriate development of the fetus.

• #1 DIC in Pregnancy – Pathophysiology, Clinical Characteristics, Di | JBM

  https://www.dovepress.com/dic-in-pregnancy–pathophysiology-clinical-characteristics-diagnostic–peer-reviewed-fulltext-article-JBM

  Abruption of the placenta is the classical example for this mechanism, especially in cases of concealed abruption or when it is complicated by stillbirth. Even though some regard that consumption coagulopathy as the underlying mechanism of placental abruption associated DIC, it seems that there is more to it. Indeed, women with a retro placental clot have a faster developing and more severe form of DIC than those with PPH although they have overall lower blood loss. Indeed, patients who develop placental abruption suffer from a combined coagulopathy incorporating consumption coagulopathy and substantial release of thromboplastin (tissue factor) into the maternal circulation. […] Recent advances in the understanding of the mechanisms of DIC in HELLP syndrome suggest that abruption rather than liver dysfunction is the driving force for the development of DIC in these patients.

• #1 Placental abruption – WikEM

  https://wikem.org/wiki/Placental_abruption

  Premature separation of placenta from uterus. […] Usually occurs spontaneously but also associated with trauma (even minor trauma). […] Abruption may be complete, partial, or concealed. […] Amount of external bleeding may not correlate with severity. […] Fibrinogen strongly correlates with severity of hemorrhage (200 mg/dL has 100% PPV for severe bleed). […] Consider minimum 6 hours observation even if abruption not identified, if mechanism is concerning.

• #1 Placental Abruption – Miracle Babies

  https://www.miraclebabies.org.au/content/placental-abruption/gm4lm0

  Placental abruption is the early separation of a placenta from the lining of the uterus before the birth of the baby. […] Placental abruption is a condition most commonly occurring before 37 weeks gestation, where the placenta detaches from the wall of the uterus, either partially or totally. […] When a placental abruption occurs, the blood supply from the uterus lining and the placenta are torn apart and thus the oxygen and nutrient supply to the foetus is affected. […] The consequences associated with a placenta abruption can be significant to both mother and baby. […] The main risks to the mother are: heavy bleeding requiring blood transfusions, hysterectomy, in severe cases death. […] The risks to the baby are: preterm birth, low birth weight, lack of oxygen causing brain damage, stillbirth, neonatal death. […] Depending on the seriousness and your gestation, you may be admitted into hospital where you and your baby can be closely monitored. If your condition is deemed severe, and the baby is viable, an immediate delivery may be necessary, either vaginally or via caesarean section.

• #1 Placental Abruption | Birth Injury Center

  https://birthinjurycenter.org/pregnancy-complications/placental-abruption/

  Placental abruption sometimes results in stillbirth—the birth of a baby who has died in the womb after at least 20 weeks of pregnancy. According to an article in Obstetrics and Gynecology, “Abruption involving 50 percent or more of the placenta is frequently associated with fetal death.” […] Cleveland Clinic notes that blood loss can result in mothers contracting anemia and facing life-threatening complications, such as hemorrhaging, blood clotting, and kidney failure. […] To avoid delivery complications, doctors may recommend a Cesarean delivery.

• #1 Independent risk factors for placental abruption: a systematic review and meta-analysis | BMC Pregnancy and Childbirth | Full Text

  https://bmcpregnancychildbirth.biomedcentral.com/articles/10.1186/s12884-025-07482-7

  This study compiles the largest sample size to date, aiming to comprehensively summarize the independent risk factors associated with placental abruption. […] Currently, several risk factors associated with placental abruption can be categorized as related to the baseline characteristics of the patient. […] Previous placental abruption may lead to persistent damage to the decidual basalis layer, with the underlying mechanism involving vascular fibrosis mediated by the TGF- signaling pathway. […] Identifying and implementing preventive measures for risk factors associated with pregnancy complications is a crucial strategy for avoiding placental abruption. […] Hypertensive disorders of pregnancy, including gestational hypertension and preeclampsia, have been widely recognized as significant risk factors for placental abruption.

• #1 Independent risk factors for placental abruption: a systematic review and meta-analysis | BMC Pregnancy and Childbirth | Full Text

  https://bmcpregnancychildbirth.biomedcentral.com/articles/10.1186/s12884-025-07482-7

  These conditions may compress the placenta and lead to its premature detachment. […] Previous studies have indicated that maternal and fetal circulatory changes due to hypoxia, uteroplacental vascular dysfunction, and placental ischemia are major pathophysiological mechanisms underlying placental abruption. […] Consequently, placental abruption is viewed as a long-term chronic condition originating in early pregnancy. […] The remaining 33 are independent risk factors. […] The cumulative effect of two or more risk factors can significantly elevate the incidence of placental abruption. […] The subgroup analysis of this study revealed a significant impact of study design on the estimation of risk factors for placental abruption. […] These findings emphasize the need for cautious interpretation of placental abruption risk factors, considering potential biases related to study design. […] The strength of this study lies in its inclusion of multifactorial analyses, which aim to minimize the confounding effects and provide a deeper exploration of the independent risk factors for placental abruption.

• #1 Placental Abruption | GLOWM

  https://www.glowm.com/section-view/heading/Placental%20Abruption/item/122

  Grade II: Intermediate. This accounts for 45% of all cases. […] Grade III: Severe. This accounts for 15% of all cases. […] This grading system may be helpful in establishing a therapeutic plan, but caution should be used because it is important to remember that placental abruption is a dynamic process and maternal-fetal status can change quickly. […] Despite numerous clinical and epidemiologic studies, the etiology of placental abruption is yet to be precisely determined, but it is thought to be a disease of the decidua and uterine blood vessels. […] Chronic factors include maternal vascular disease, chronic and pregnancy-induced hypertension (PIH), cigarette smoking, drug ingestion, nutritional deficiency, uterine anomalies and tumors, supine hypotension syndrome, antiphospholipid syndrome, congenital thrombophilias, hyperhomocystinemia, and, rarely, congenital hypofibrinogenemia.

• #1 Take a look at the Recent articles

  https://www.oatext.com/Preterm-placental-abruption-Tocolytic-therapy-regarded-as-a-poor-neonatal-prognostic-factor.php

  The most important finding from this investigation is that tocolytic therapy is a factor involved in exacerbation of the neonatal prognosis in preterm placental abruption. […] We can point out three possible reasons. The first possibility is that premature labor induces placental abruption. The second possibility is that tocolytic therapy delays the diagnosis of placental abruption. The third possibility is that the tocolytic agent itself causes or exacerbates placental abruption. […] In conclusion, the present study showed that use of tocolytic agents is a possible factor that causes poor neonatal outcomes in preterm placental abruption.

• #1

  https://journals.lww.com/clinicalobgyn/fulltext/2025/03000/placental_abruption__pathophysiology,_diagnosis,.17.aspx

  Placental abruption is a complete or partial separation of the placenta from the uterine decidua. […] However, the pathophysiology remains incompletely understood. […] We present a review of the pathophysiology, diagnosis, and management of placental abruption, exploring overlapping processes which contribute to premature placental separation.

• #2

  https://journals.lww.com/greenjournal/fulltext/2006/10000/placental_abruption.26.aspx

  Placental abruption complicates about 1% of pregnancies and is a leading cause of vaginal bleeding in the latter half of pregnancy. […] The maternal effect of abruption depends primarily on its severity, whereas its effect on the fetus is determined both by its severity and the gestational age at which it occurs. […] Abruption involving more than 50% of the placenta is frequently associated with fetal death. […] The management of abruption should be individualized on a case-by-case basis depending on the severity of the abruption and the gestational age at which it occurs. […] Most cases of placental abruption cannot be predicted or prevented. However, in some cases, maternal and infant outcomes can be optimized through attention to the risks and benefits of conservative management, ongoing evaluation of fetal and maternal well-being, and through expeditious delivery where appropriate. […] Early diagnosis and prompt delivery in cases of abruption at term and conservative management in selected cases remote from term may improve outcomes with abruption.

• #2 Placenta Previa and Placenta Abruption | Article | GLOWM

  https://www.glowm.com/article/heading/vol-10–common-obstetric-conditions–placenta-previa-and-placenta-abruption/id/413763

  Placenta abruptio or abruptio placentae, of the causes of bleeding during pregnancy, refers to the partial or total premature separation of the normally implanted placenta before delivery of the fetus, and after 20 weeks gestation. […] The pathophysiology of placenta abruption varies on whether the abruptio is spontaneous (majority of cases) or traumatic. Preceded by impaired trophoblastic invasion and atherosis, inflammation or infection, spontaneous placenta abruption is thought to start when a decidual spiral artery ruptures into the decidua basalis causing a retroplacental hematoma. The hematoma may expand causing further disruption of more spiral vessels and extension of placental abruptio and compression of the underlying placenta. In traumatic abruptio placenta, placental separation may result from varying degrees of trauma from such sources as motor vehicle accidents, physical assault or fall. In these cases, the placental separation is thought to result from deceleration injury as well as deformation of the elastic myometrium around an inelastic placenta. In spontaneous abruptio the source of bleeding is usually maternal due to separation within the maternal decidua, while the placental villi are unaffected. Fetalmaternal hemorrhage is likely to occur in traumatic abruption when there is placental tear. […] Placenta abruptio can also be acute or chronic in onset. Chronic abruption placenta begins early in pregnancy and may be associated with oligohydramnios as part of chronic abruption-oligohydramnios sequence (CAOS).

• #2 Placental abruption pathophysiology – wikidoc

  https://wikidoc.org/index.php/Placental_abruption_pathophysiology

  Trauma, hypertension, or coagulopathy, contributes to the avulsion of the anchoring placental villi from the expanding lower uterine segment, which in turn, leads to bleeding into the decidua basalis. This can push the placenta away from the uterus and cause further bleeding. […] Bleeding through the vagina, called overt or external bleeding, occurs 80% of the time, though sometimes the blood will pool behind the placenta, known as concealed or internal placental abruption.

• #2 Placental Abruption | Obgyn Key

  https://obgynkey.com/placental-abruption-2/

  A study by Ananth and colleagues found that a first-trimester pregnancy-associated plasma protein A less than the 5th percentile was associated with an increased risk of abruption. […] Although in the past abruption was regarded as an acute event, there is now an ample body of evidence that suggests that the pathophysiological processes that lead to most abruptions have their origins early in pregnancy.

• #2 Molecular Changes on Maternal–Fetal Interface in Placental Abruption—A Systematic Review

  https://www.mdpi.com/1422-0067/22/12/6612

  Placental abruption is the separation of the placenta from the lining of the uterus before childbirth. […] The aim of this review was to examine the current state of knowledge concerning the molecular changes on the maternal–fetal interface occurring in placental abruption. […] The available evidence indicates that the disruption of the immunological processes on the maternal–fetal interface plays a crucial role in the pathophysiology of placental abruption. […] The features of chronic non-infectious inflammation and augmented immunological cytotoxic response were found to be present in placental abruption samples in the reviewed studies. […] The etiopathogenesis of placental abruption is multifactorial. […] According to the current concept of ischemic placental disease, placental abruption is one of the manifestations of impaired placental function comprising PE and FGR.

• #2 Severe postpartum hemorrhage with placental abruption managed by the uterine sandwich: a case report

  https://www.imrpress.com/journal/CEOG/46/2/10.12891/ceog4387.2019/htm

  Postpartum hemorrhage (PPH) is a significant factor in maternal mortality and morbidity. Placental abnormalities are a major contributor to obstetric hemorrhage. The common placental abnormalities include placental abruption, placenta previa, and adherent and retained placenta. Placental abruption complicates 0.4-1% of pregnancies. […] When placental abruption occurs, blood infiltrates between the myometrial fibers from behind the placenta and sometimes permeates the whole thickness of the myometrium. This transforms the uterine body from pink to dark red, which is the hallmark of a Couvelaire uterus. Couvelaire uteri, which very rarely occur with effective postpartum uterine contractions, can lead to uterine atony and further hemorrhage. […] In conclusion, the authors report the first case of severe PPH with placental abruption managed by using the uterine sandwich. This technique is an effective option for the treatment of severe PPH.

• #2 Placental abruption – Wikipedia

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

  Placental abruption is when the placenta separates early from the uterus, in other words separates before childbirth. It occurs most commonly around 25 weeks of pregnancy. The cause of placental abruption is not entirely clear. Risk factors include smoking, pre-eclampsia, prior abruption (most important and predictive risk factor), trauma during pregnancy, cocaine use, and previous cesarean section. In the vast majority of cases, placental abruption is caused by the maternal vessels tearing away from the decidua basalis, not the fetal vessels. The underlying cause is often unknown. A small number of abruptions are caused by trauma that stretches the uterus. Because the placenta is less elastic than the uterus, it tears away when the uterine tissue stretches suddenly. When anatomical risk factors are present, the placenta does not attach in a place that provides adequate support, and it may not develop appropriately or be separated as it grows. Cocaine use during the third trimester has a 10% chance of causing abruption. Though the exact mechanism is not known, cocaine and tobacco cause systemic vasoconstriction, which can severely restrict the placental blood supply (hypoperfusion and ischemia), or otherwise disrupt the vasculature of the placenta, causing tissue necrosis, bleeding, and therefore abruption. In most cases, placental disease and abnormalities of the spiral arteries develop throughout the pregnancy and lead to necrosis, inflammation, vascular problems, and ultimately, abruption. Because of this, most abruptions are caused by bleeding from the arterial supply, not the venous supply. The accumulating blood pushes between the layers of the decidua, pushing the uterine wall and placenta apart. When the placenta is separated, it is unable to exchange waste, nutrients, and oxygen, a necessary function for the fetus’s survival. The fetus dies when it no longer receives enough oxygen and nutrients to survive.

• #2 Placental Abruption | Birth Injury Center

  https://birthinjurycenter.org/pregnancy-complications/placental-abruption/

  Placental abruption is an uncommon and serious condition that can cause pain and bleeding for the mother and oxygen deprivation for the baby. Placental abruption, also called abruptio placentae, occurs when the placenta, which carries nutrients and oxygen to the baby, separates from the uterus before the completion of the second stage of labor. […] The exact cause of placental abruption is unknown. According to the Mayo Clinic, one cause may be trauma or injury to the abdomen, such as from a fall or accident. Another potential cause is a rapid loss of the amniotic fluid that surrounds and cushions the baby. […] Although scientists are unsure of the exact cause of placental abruption, they’ve identified several risk factors. These include: […] Babies can suffer brain injuries because of oxygen deprivation when placental abruption is present.

• #2 Molecular Changes on Maternal–Fetal Interface in Placental Abruption—A Systematic Review

  https://www.mdpi.com/1422-0067/22/12/6612

  A high proportion of experts claimed that placental abruption was particularly related to the accumulation of cytotoxic response resulting from the insufficient immunosuppressive activity of the decidua. […] Recent studies also suggested an important role of the cytosolic multiprotein oligomers responsible for the activation of inflammatory responses. […] The obtained data will facilitate a better understanding of the phenomenon and the improvement of diagnostic and therapeutic opportunities for patients at risk of developing placental abruption.

• #2 Placenta Abruption and Delivery Method | IntechOpen

  https://www.intechopen.com/chapters/69000

  The clinical picture of abruption depends on the degree of bleeding. […] The diagnosis of placenta abruption is based on clinical and ultrasound imaging, laboratory findings and placental examination after delivery. […] In the treatment of abruption, consideration should be given to gestational age, clinical picture, maternal and fetal condition. […] Fetal morbidity is caused by the insult of the abruption itself and by issues related to prematurity when early delivery is required to alleviate maternal or fetal distress. […] Fetal and maternal death may occur if appropriate interventions are not undertaken. The severity of fetal distress correlates with the degree of placental separation. In near-complete or complete abruption, fetal death is inevitable unless an immediate caesarian delivery is performed.

• #2 DIC in Pregnancy – Pathophysiology, Clinical Characteristics, Di | JBM

  https://www.dovepress.com/dic-in-pregnancy–pathophysiology-clinical-characteristics-diagnostic–peer-reviewed-fulltext-article-JBM

  Abruption of the placenta is the classical example for this mechanism, especially in cases of concealed abruption or when it is complicated by stillbirth. Even though some regard that consumption coagulopathy as the underlying mechanism of placental abruption associated DIC, it seems that there is more to it. Indeed, women with a retro placental clot have a faster developing and more severe form of DIC than those with PPH although they have overall lower blood loss. Indeed, patients who develop placental abruption suffer from a combined coagulopathy incorporating consumption coagulopathy and substantial release of thromboplastin (tissue factor) into the maternal circulation. […] Recent advances in the understanding of the mechanisms of DIC in HELLP syndrome suggest that abruption rather than liver dysfunction is the driving force for the development of DIC in these patients.

• #2 EM@3AM: Placental Abruption – emDocs

  https://www.emdocs.net/em3am-placental-abruption/

  Placental abruption is defined as the premature separation of the placenta from the uterine wall usually after 20 weeks and prior to delivery. […] Likely from a ruptured decidual spiral artery causing an expanding retroplacental hematoma. This bleeding can cause a total or partial separation. […] Abnormal trophoblastic invasion of uterine vessels can be a predisposing factor to abruption. Other contributing factors include shearing forces from trauma, long-standing processes such as HTN, and vasoconstriction with cocaine use. […] As tissue is separated in placental abruption, clot formation and the repeated release of thromboplastic material into circulation increases the risk of DIC. […] Blood accumulation in the uterine wall can stimulate the myometrium to contract causing uterine contractions. […] With placental separation, the oxygen and nutrient supply to the fetus is compromised, causing growth restrictions and even risk for fetal death.

• #2 Placental Abruption | Birth Injury Center

  https://birthinjurycenter.org/pregnancy-complications/placental-abruption/

  Placental abruption sometimes results in stillbirth—the birth of a baby who has died in the womb after at least 20 weeks of pregnancy. According to an article in Obstetrics and Gynecology, “Abruption involving 50 percent or more of the placenta is frequently associated with fetal death.” […] Cleveland Clinic notes that blood loss can result in mothers contracting anemia and facing life-threatening complications, such as hemorrhaging, blood clotting, and kidney failure. […] To avoid delivery complications, doctors may recommend a Cesarean delivery.

• #2 Placental Abruption During Labor & Delivery | Birth Injury Lawyers

  https://www.abclawcenters.com/practice-areas/prenatal-birth-injuries/labor-and-delivery-complications-and-errors/placental-abruption/

  Placental abruption happens when the placenta separates prematurely from the uterine wall. It usually occurs in the third trimester, but can occur as early as 20 weeks gestation. Placental abruption occurs in about one percent of pregnancies (1). […] When this happens, the baby can stop receiving adequate oxygen. Even cases of partial placental abruption (when the placenta is not completely detached) can progress and become severe very quickly, so physicians should carefully monitor the situation and be prepared for an emergency C-section. If a necessary C-section is delayed, the baby may experience birth asphyxia and sustain forms of brain damage such as hypoxic-ischemic encephalopathy (HIE) and cerebral palsy (CP). […] Medical professionals should follow standard of care to minimize the chance of placental abruption (especially in women with risk factors), monitor the health of both mothers and babies, and promptly intervene if a placental abruption occurs. Failure to do these things is negligence, and if negligence causes harm, it constitutes medical malpractice. […] A birth injury can be defined as any type of harm to a baby that occurs shortly before, during, or after delivery. In cases of placental abruption, babies may sustain birth injuries such as hypoxic-ischemic encephalopathy, cerebral palsy, and other forms of brain damage.

• #2 Independent risk factors for placental abruption: a systematic review and meta-analysis | BMC Pregnancy and Childbirth | Full Text

  https://bmcpregnancychildbirth.biomedcentral.com/articles/10.1186/s12884-025-07482-7

  These conditions may compress the placenta and lead to its premature detachment. […] Previous studies have indicated that maternal and fetal circulatory changes due to hypoxia, uteroplacental vascular dysfunction, and placental ischemia are major pathophysiological mechanisms underlying placental abruption. […] Consequently, placental abruption is viewed as a long-term chronic condition originating in early pregnancy. […] The remaining 33 are independent risk factors. […] The cumulative effect of two or more risk factors can significantly elevate the incidence of placental abruption. […] The subgroup analysis of this study revealed a significant impact of study design on the estimation of risk factors for placental abruption. […] These findings emphasize the need for cautious interpretation of placental abruption risk factors, considering potential biases related to study design. […] The strength of this study lies in its inclusion of multifactorial analyses, which aim to minimize the confounding effects and provide a deeper exploration of the independent risk factors for placental abruption.

• #2 Placental Abruption | GLOWM

  https://www.glowm.com/section-view/heading/Placental%20Abruption/item/122

  Acute factors include maternal trauma, decompression of the overdistended uterus, and perhaps the acute vascular changes secondary to cocaine abuse. […] The concept of ischemic placental disease will be further discussed later in this chapter. […] We have introduced the concept of ischemic placental disease, under which we include the 3 clinical conditions of preeclampsia, small for gestational age births, and placental abruption. […] It may be that these conditions may be different clinical manifestations of a common etiology (defective/inadequate placentation). […] The pathophysiology of ischemic placental disease involves impaired trophoblastic invasion of maternal spiral arteries, followed by placental hypoxia, release of thrombin/inflammatory factors, and then endothelial cell activation and damage. […] Therefore, placental abruption appears to be one of the possible clinical manifestations of ischemic placental disease.

• #2 Placental Abruption

  https://www.birthinjuryhelpcenter.org/birth-injuries/prenatal-problems/placental-abruption/

  The appropriate method for treating or managing placental abruption will depend on the timing and severity of the placental abruption. […] Placental abruptions are considered moderate or severe when vaginal bleeding is heavy or moderate and the abruption triggers maternal tachycardia or elevated blood pressure. […] This study looked at placental abruptions clinical characteristics and outcomes. […] The researchers recommended that healthcare providers should consider symptoms, risk factors, physical signs, ultrasound monitoring, and cardiac care when diagnosing a placental abruption. […] They concluded that understanding these genetic factors may help prevent and timely diagnose the condition.

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