What is the most common cause of late postpartum hemorrhage?
Retained placental fragments
Uterine atony
Trauma
Lacerations
The Correct Answer is A
Retained placental fragments are the most common cause of late postpartum hemorrhage. Retained placental fragments can lead to infection and subinvolution of the placental site, which prevents the uterus from contracting and stopping the bleeding.
Choice B is wrong because uterine atony is the most common cause of early postpartum hemorrhage, not late postpartum hemorrhage. Uterine atony occurs when the uterus fails to contract after delivery.
Choice C is wrong because trauma is a rare cause of late postpartum hemorrhage. Trauma can occur during delivery and cause lacerations or hematomas that can bleed later, but this is uncommon.
Choice D is wrong because lacerations are also a rare cause of late postpartum hemorrhage. Lacerations can occur in the cervix, vagina or perineum during delivery and cause bleeding, but this usually happens immediately or within 24 hours after delivery.
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Correct Answer is A
Explanation
Uterine atony is the most common cause of postpartum hemorrhage, accounting for up to 80% of cases.It occurs when the uterus does not contract enough to stop the bleeding from the placental site.Uterine atony can be caused by factors such as prolonged labor, multiple pregnancy, large baby, infection or use of certain medications.
The other statements are wrong because:
• B.Retained placenta is the second most common cause of postpartum hemorrhage, but it only accounts for about 10% of cases.It occurs when part or all of the placenta remains attached to the uterine wall and prevents the uterus from contracting properly.
• C.Lacerations are tears or cuts in the cervix, vagina or perineum that can cause bleeding after delivery.They are usually minor and can be repaired with stitches, but they can also be severe and require surgery.Lacerations are not very common causes of postpartum hemorrhage, and they usually occur along with other factors such as uterine atony or retained placenta.
• D.Hematomas are collections of blood under the skin or in the tissues that can result from trauma during delivery.They can cause pain, swelling and pressure in the affected area, but they are usually small and resolve on their own.Hematomas are rare causes of postpartum hemorrhage, and they usually occur along with other factors such as lacerations or coagulation disorders.
Normal ranges for blood loss after delivery are less than 500 mL for vaginal birth and less than 1000 mL for cesarean birth.Blood loss greater than these amounts can indicate postpartum hemorrhage and require immediate medical attention.
Correct Answer is A
Explanation
Oxytocin is a uterotonic medication that stimulates uterine contractions and reduces bleeding.It is the most effective intervention for preventing and treating postpartum hemorrhage caused by uterine atony.
Uterine massage can also help to improve uterine tone and expel clots.
Choice B) Administering magnesium sulfate is wrong because magnesium sulfate is used to prevent seizures in patients with preeclampsia or eclampsia, not to control bleeding.
Choice C) Administering heparin is wrong because heparin is an anticoagulant that prevents blood clotting.
It is used to treat or prevent thromboembolic disorders, not to stop bleeding.
Choice D) Administering insulin is wrong because insulin is used to lower blood glucose levels in patients with diabetes mellitus, not to manage hemorrhage.
Normal blood loss after vaginal delivery is less than 500 mL and after cesarean delivery is less than 1000 mL.
Postpartum hemorrhage is defined as blood loss of at least 100
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