Question

Difficulty: MediumObstetric Complications

Match each clinical presentation of peripartum complications to the most accurate diagnostic etiology.

  • A G2P1 patient at 37 weeks of pregnancy presents with sudden-onset, severe, continuous abdominal pain and dark vaginal bleeding. Examination reveals a rigid, hypertonic uterus.Placental abruption
  • An otherwise healthy G3P2 patient at 36 weeks of pregnancy reports a sudden episode of painless, bright red vaginal bleeding. Her abdomen is soft and non-tender.Placenta previa
  • A G4P3 patient at 39 weeks of pregnancy with a history of a prior classical cesarean delivery experiences sudden tearing abdominal pain, followed by an immediate upward shift in fetal station.Uterine rupture
  • A G1P0 patient at 38 weeks of pregnancy undergoes artificial rupture of membranes, which is immediately followed by a gush of blood-tinged vaginal fluid and acute, sustained fetal bradycardia.Vasa previa
  • A G1P0 patient at 39 weeks of pregnancy experiences sudden, profound cardiovascular collapse and hypoxemic respiratory failure immediately following a prolonged vaginal delivery.Amniotic fluid embolism

Answer

1 matches with Placental abruption, 2 matches with Placenta previa, 3 matches with Uterine rupture, 4 matches with Vasa previa, and 5 matches with Amniotic fluid embolism.
Each clinical vignette provides classic pathognomonic signs for distinct obstetric emergencies. Painful bleeding with a firm uterus indicates placental abruption. Painless bleeding with a soft uterus indicates placenta previa. Sudden loss of fetal station with a prior classical incision indicates uterine rupture. Bleeding and fetal bradycardia post-amniotomy indicate vasa previa. Immediate postpartum cardiovascular collapse indicates an amniotic fluid embolism.

Step-by-Step Solution

1
Analyze the first presentation: painful bleeding and a rigid uterus.
Identified as placental abruption.
The separation of the placenta causes retroplacental hemorrhage, leading to uterine irritability, tetany, and severe pain.
2
Analyze the second presentation: painless, bright red bleeding.
Identified as placenta previa.
The placenta covers the cervical os; as the lower uterine segment changes, painless maternal bleeding occurs.
3
Analyze the third presentation: prior classical cesarean, sudden pain, and loss of fetal station.
Identified as uterine rupture.
A classical cesarean scar has a high risk of rupture, causing the fetus to be extruded into the abdomen (demonstrated by the loss of station).
4
Analyze the fourth presentation: bleeding and fetal bradycardia immediately post-amniotomy.
Identified as vasa previa.
Amniotomy directly ruptures unprotected fetal vessels crossing the os, leading to rapid fetal exsanguination and immediate bradycardia.
5
Analyze the fifth presentation: sudden postpartum cardiovascular collapse.
Identified as amniotic fluid embolism.
Amniotic fluid entering the maternal circulation causes a massive anaphylactoid reaction, right heart failure, and often disseminated intravascular coagulation.

Key Concept

Clinical differentiation of severe obstetric complications based on pain, timing of bleeding, fetal heart rate changes, and maternal vital signs.
Rate this question