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Difficulty: HardTrauma and Burns

A 31-year-old woman, gravida 2, para 1, at 34 weeks gestation is brought to the emergency department via ambulance after being involved in a high-speed motor vehicle collision. She was the restrained driver of a vehicle that struck a concrete barrier. On arrival, the patient is lethargic and complains of severe, diffuse abdominal pain.

Vital signs are:
Temperature: 36.5°C (97.7°F)
Heart rate: 138/min
Blood pressure: 78/42 mmHg
Respiratory rate: 26/min
Oxygen saturation: 96% on face mask

Physical examination reveals bruising across the lower abdomen in a seatbelt distribution. The abdomen is diffusely tender with guarding. A focused assessment with sonography for trauma (FAST) demonstrates a large amount of anechoic free fluid in the hepatorenal and splenorenal recesses.

Continuous fetal heart rate monitoring reveals a baseline of 165/min with minimal variability and recurrent late decelerations.

Intravenous access is established, and the patient receives 2 L of warmed lactated Ringer solution and 2 units of uncrossmatched type O-negative blood. Repeat vital signs show a heart rate of 132/min and a blood pressure of 80/45 mmHg.

Which of the following is the most appropriate next step in the management of this patient?

  1. A
    Computed tomography scan of the abdomen and pelvis
  2. B
    Continued blood product transfusion and serial FAST examinations
  3. C
    Emergent cesarean delivery
  4. Exploratory laparotomyAnswer
  5. E
    Administration of intravenous vasopressors and left lateral decubitus positioning

Answer

Exploratory laparotomy
This patient is in hemorrhagic shock due to blunt abdominal trauma, confirmed by a positive FAST examination. In pregnant trauma patients, the management priorities are identical to those in non-pregnant patients. The definitive treatment for a hemodynamically unstable patient with intraperitoneal hemorrhage is immediate exploratory laparotomy. The non-reassuring fetal heart rate tracing (tachycardia, minimal variability, late decelerations) indicates uteroplacental insufficiency secondary to maternal hypovolemia and sympathetic vasoconstriction. Resuscitating the mother and achieving hemodynamic stability via surgical source control is the most effective way to address this secondary fetal distress.

Step-by-Step Solution

1
Identify the patient's hemodynamic status after initial resuscitation
The patient remains in hemorrhagic shock, with a blood pressure of 80/45 mmHg and a heart rate of 132/min despite receiving fluids and blood products.
Hemodynamic instability determines the urgency and specific pathway of trauma management.
2
Interpret the diagnostic imaging findings
The FAST examination is positive for large amounts of free intraperitoneal fluid.
This confirms that the source of the hemorrhagic shock is intra-abdominal bleeding.
3
Determine the priority of care in a pregnant trauma patient
Maternal stabilization takes absolute precedence; the fetal distress (fetal tachycardia, minimal variability, late decelerations) is a secondary consequence of maternal hypoperfusion.
Standard ATLS principles apply during pregnancy; the most effective way to restore placental perfusion and save the fetus is to resuscitate the mother.
4
Select the definitive intervention
Immediate exploratory laparotomy is required for source control of the intra-abdominal bleeding.
A hemodynamically unstable patient with a positive FAST requires emergent surgical intervention, bypassing further imaging, conservative observation, or obstetric procedures that delay hemorrhage control.

Key Concept

In a hemodynamically unstable pregnant trauma patient with a positive FAST exam, immediate exploratory laparotomy is required for maternal hemorrhage control. Maternal resuscitation is the absolute priority and the most effective treatment for secondary fetal distress.
Estimated Time:1m 30s
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Topics

Trauma and Burns

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