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Difficulty: HardObstetric Complications

A 28-year-old woman, gravida 3, para 2, at 36 weeks gestation is brought to the emergency department via ambulance following a severe motor vehicle collision. She complains of intense, unremitting abdominal pain and moderate dark red vaginal bleeding. Her temperature is 36.8°C (98.2°F), blood pressure is 88/54 mm Hg, pulse is 126/min, and respirations are 24/min. Physical examination reveals a rigid, exquisitely tender uterus with no palpable relaxation between contractions. Continuous fetal monitoring demonstrates a baseline of 175/min with absent variability and recurrent late decelerations. Initial laboratory evaluation reveals a hemoglobin level of 7.8 g/dL, a platelet count of 65,000/mm³, and an elevated international normalized ratio (INR). During the initial assessment, the nursing staff notes continuous, non-clotting blood oozing from the patient's peripheral intravenous catheter sites. Which of the following is the most appropriate next step in the management of this patient?

  1. Initiate aggressive maternal resuscitation with blood products and perform an emergent cesarean deliveryAnswer
  2. B
    Administer maternal oxygen, reposition to the left lateral decubitus position, and continue observation
  3. C
    Transfuse fresh frozen plasma and platelets, delaying delivery until the coagulopathy resolves
  4. D
    Reassure the patient that her tachycardia and mild anemia represent normal adaptations to the third trimester of pregnancy
  5. E
    Perform an immediate bedside pelvic ultrasound to definitively confirm the presence of a retroplacental hematoma

Answer

Initiate aggressive maternal resuscitation with blood products and perform an emergent cesarean delivery
The patient's clinical presentation of a rigid, tender uterus, dark vaginal bleeding, and fetal distress following trauma is classic for severe placental abruption. The presence of oozing from intravenous sites, thrombocytopenia, and an elevated INR indicates disseminated intravascular coagulation (DIC), a consumptive coagulopathy triggered by the systemic release of tissue factor from the decidual hematoma. In the setting of maternal hemodynamic instability (shock) and a Category III fetal heart rate tracing, the definitive treatment is immediate surgical delivery. Aggressive maternal resuscitation with blood products must occur concurrently to address the hemorrhage and severe coagulopathy.

Step-by-Step Solution

1
Analyze the maternal clinical presentation following blunt abdominal trauma
The patient exhibits a rigid, tender uterus and dark vaginal bleeding, highly characteristic of placental abruption.
To establish the primary obstetric diagnosis causing the acute decompensation.
2
Interpret the laboratory findings and physical exam clues regarding hemostasis
Oozing from IV sites, thrombocytopenia, and an elevated INR confirm the presence of disseminated intravascular coagulation (DIC).
Placental abruption releases tissue factor from the decidua, triggering a life-threatening consumptive coagulopathy.
3
Evaluate the fetal heart rate tracing
Fetal tachycardia, absent variability, and late decelerations constitute a Category III tracing.
To determine fetal status and the urgency of intervention.
4
Determine the definitive management strategy based on maternal and fetal status
Concurrent massive transfusion protocol activation and emergent cesarean delivery.
Definitive treatment for abruption-induced DIC is rapid evacuation of the uterus; delay is contraindicated in hemodynamically unstable patients.

Key Concept

Diagnosis and acute surgical management of severe placental abruption complicated by disseminated intravascular coagulation (DIC)
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Topics

Obstetric Complications

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