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Emergency And Acute Medicine – Postpartum Hemorrhage
Postpartum hemorrhage (PPH) is defined as excessive bleeding after 20 weeks of gestation and is categorized as primary (occurring within 24 hours of delivery) or secondary (occurring more than 24 hours but within 12 weeks postpartum). It is defined quantitatively as blood loss greater than 500 mL after vaginal delivery or greater than 1,000 mL after cesarean section. PPH occurs in approximately 4% of vaginal deliveries and 6% of cesarean sections. It is the leading cause of maternal death worldwide, accounting for about 25% of pregnancy-related deaths, with nearly half of postpartum deaths attributed to hemorrhage. The majority of cases are caused by uterine atony (50–60%), retained placenta (20–30%), or cervical and vaginal lacerations (10%). Serious complications include hypovolemic shock, need for blood transfusion, acute respiratory distress syndrome, renal or hepatic failure, Sheehan syndrome, disseminated intravascular coagulation (DIC), infertility, and death.
The causes of PPH are commonly remembered as the “4 Ts”: Tone (uterine atony), Tissue (retained placental tissue), Trauma (lacerations or uterine rupture), and Thrombin (coagulopathies). Immediate causes include uterine atony, genital tract lacerations, retained placental tissue, placenta accreta, uterine rupture or inversion, puerperal hematoma, and coagulation disorders. Delayed PPH is often due to retained products of conception, postpartum endometritis, withdrawal of exogenous estrogen, hematoma, or underlying coagulopathies such as idiopathic thrombocytopenic purpura, thrombotic thrombocytopenic purpura, von Willebrand disease, or DIC. Risk factors include prior PPH, advanced maternal age, multiple gestations, prolonged labor, polyhydramnios, instrumental delivery, fetal demise, anticoagulation therapy, placental abruption, fibroids, prolonged oxytocin use, cesarean section, placenta previa or accreta, chorioamnionitis, and general anesthesia.
Clinically, patients present with ongoing vaginal bleeding that is often painless. Signs of hypovolemia include tachycardia, tachypnea, narrow pulse pressure, decreased urine output, cool clammy skin, poor capillary refill, and altered mental status. Notably, hypotension may not occur until blood loss exceeds 1,500 mL. Delayed PPH typically presents with copious vaginal bleeding days to weeks after delivery. History should focus on delivery complications, episiotomy, prior clotting disorders, and symptoms of hypovolemia such as dizziness, syncope, pallor, and decreased urine output. Physical examination requires thorough inspection of the perineum, vagina, cervix, and uterus, including external inspection, speculum examination, and bimanual examination.
Evaluation includes rapid assessment of uterine tone, retained products, and genital tract trauma. Laboratory studies should include complete blood count, platelet count, prothrombin time, partial thromboplastin time, fibrinogen level, and type and cross-match for blood products. Hemoglobin should be rapidly determined. Ultrasound may help identify retained products in delayed PPH or intrauterine or intra-abdominal fluid collections, though manual examination is often more sensitive and may be both diagnostic and therapeutic. Puerperal hematomas should be considered when pain accompanies tachycardia and hypotension.
Management requires simultaneous hemorrhage control and aggressive resuscitation. Immediate priorities include airway support, supplemental oxygen, cardiac monitoring, establishment of large-bore IV access, rapid crystalloid infusion, blood product resuscitation as needed, and Foley catheter placement to monitor urine output. Uterine atony is treated first with bimanual uterine massage and administration of uterotonics. Oxytocin is first-line therapy, followed by methylergonovine (avoided in hypertensive patients) and 15-methyl prostaglandin F2α (used cautiously in asthma). Genital tract lacerations must be identified and repaired promptly with absorbable sutures. Uterine inversion requires immediate manual repositioning using the Johnson maneuver; if unsuccessful, tocolytic agents such as terbutaline or magnesium sulfate may be administered to facilitate reduction. Surgical intervention is required if medical therapy fails, and hysterectomy is necessary in approximately 1 in 1,000 deliveries. Radiologic embolization may also be considered.
Uterine tamponade with balloon devices such as a Foley catheter, Rusch catheter, Sengstaken–Blakemore tube, or Bakri balloon may serve as temporizing measures for continued bleeding. Coagulopathies require targeted treatment with fresh-frozen plasma, platelets, or cryoprecipitate. Active management of the third stage of labor—including prompt uterotonic administration, cord traction with uterine countertraction, and uterine massage—reduces PPH risk.
All patients with immediate PPH require admission to a monitored setting, with early obstetric consultation and ICU care if hemodynamic instability or DIC is present. Patients with endometritis require admission for intravenous antibiotics. Selected cases of delayed PPH that are easily controlled and hemodynamically stable may be managed outpatient with close obstetric follow-up and oral methylergonovine when appropriate. Close follow-up is essential, and patients should seek immediate care if bleeding recurs.
Early recognition, rapid resuscitation, aggressive use of uterotonics, and timely obstetric intervention are critical. Most maternal deaths from PPH result from delayed diagnosis or inadequate resuscitation. Prompt action and multidisciplinary coordination are essential to prevent morbidity and mortality.
Postpartum hemorrhage (PPH) is defined as excessive bleeding after 20 weeks of gestation and is categorized as primary (occurring within 24 hours of delivery) or secondary (occurring more than 24 hours but within 12 weeks postpartum). It is defined quantitatively as blood loss greater than 500 mL after vaginal delivery or greater than 1,000 mL after cesarean section. PPH occurs in approximately 4% of vaginal deliveries and 6% of cesarean sections. It is the leading cause of maternal death worldwide, accounting for about 25% of pregnancy-related deaths, with nearly half of postpartum deaths attributed to hemorrhage. The majority of cases are caused by uterine atony (50–60%), retained placenta (20–30%), or cervical and vaginal lacerations (10%). Serious complications include hypovolemic shock, need for blood transfusion, acute respiratory distress syndrome, renal or hepatic failure, Sheehan syndrome, disseminated intravascular coagulation (DIC), infertility, and death.
The causes of PPH are commonly remembered as the “4 Ts”: Tone (uterine atony), Tissue (retained placental tissue), Trauma (lacerations or uterine rupture), and Thrombin (coagulopathies). Immediate causes include uterine atony, genital tract lacerations, retained placental tissue, placenta accreta, uterine rupture or inversion, puerperal hematoma, and coagulation disorders. Delayed PPH is often due to retained products of conception, postpartum endometritis, withdrawal of exogenous estrogen, hematoma, or underlying coagulopathies such as idiopathic thrombocytopenic purpura, thrombotic thrombocytopenic purpura, von Willebrand disease, or DIC. Risk factors include prior PPH, advanced maternal age, multiple gestations, prolonged labor, polyhydramnios, instrumental delivery, fetal demise, anticoagulation therapy, placental abruption, fibroids, prolonged oxytocin use, cesarean section, placenta previa or accreta, chorioamnionitis, and general anesthesia.
Clinically, patients present with ongoing vaginal bleeding that is often painless. Signs of hypovolemia include tachycardia, tachypnea, narrow pulse pressure, decreased urine output, cool clammy skin, poor capillary refill, and altered mental status. Notably, hypotension may not occur until blood loss exceeds 1,500 mL. Delayed PPH typically presents with copious vaginal bleeding days to weeks after delivery. History should focus on delivery complications, episiotomy, prior clotting disorders, and symptoms of hypovolemia such as dizziness, syncope, pallor, and decreased urine output. Physical examination requires thorough inspection of the perineum, vagina, cervix, and uterus, including external inspection, speculum examination, and bimanual examination.
Evaluation includes rapid assessment of uterine tone, retained products, and genital tract trauma. Laboratory studies should include complete blood count, platelet count, prothrombin time, partial thromboplastin time, fibrinogen level, and type and cross-match for blood products. Hemoglobin should be rapidly determined. Ultrasound may help identify retained products in delayed PPH or intrauterine or intra-abdominal fluid collections, though manual examination is often more sensitive and may be both diagnostic and therapeutic. Puerperal hematomas should be considered when pain accompanies tachycardia and hypotension.
Management requires simultaneous hemorrhage control and aggressive resuscitation. Immediate priorities include airway support, supplemental oxygen, cardiac monitoring, establishment of large-bore IV access, rapid crystalloid infusion, blood product resuscitation as needed, and Foley catheter placement to monitor urine output. Uterine atony is treated first with bimanual uterine massage and administration of uterotonics. Oxytocin is first-line therapy, followed by methylergonovine (avoided in hypertensive patients) and 15-methyl prostaglandin F2α (used cautiously in asthma). Genital tract lacerations must be identified and repaired promptly with absorbable sutures. Uterine inversion requires immediate manual repositioning using the Johnson maneuver; if unsuccessful, tocolytic agents such as terbutaline or magnesium sulfate may be administered to facilitate reduction. Surgical intervention is required if medical therapy fails, and hysterectomy is necessary in approximately 1 in 1,000 deliveries. Radiologic embolization may also be considered.
Uterine tamponade with balloon devices such as a Foley catheter, Rusch catheter, Sengstaken–Blakemore tube, or Bakri balloon may serve as temporizing measures for continued bleeding. Coagulopathies require targeted treatment with fresh-frozen plasma, platelets, or cryoprecipitate. Active management of the third stage of labor—including prompt uterotonic administration, cord traction with uterine countertraction, and uterine massage—reduces PPH risk.
All patients with immediate PPH require admission to a monitored setting, with early obstetric consultation and ICU care if hemodynamic instability or DIC is present. Patients with endometritis require admission for intravenous antibiotics. Selected cases of delayed PPH that are easily controlled and hemodynamically stable may be managed outpatient with close obstetric follow-up and oral methylergonovine when appropriate. Close follow-up is essential, and patients should seek immediate care if bleeding recurs.
Early recognition, rapid resuscitation, aggressive use of uterotonics, and timely obstetric intervention are critical. Most maternal deaths from PPH result from delayed diagnosis or inadequate resuscitation. Prompt action and multidisciplinary coordination are essential to prevent morbidity and mortality.
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