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Difficulty: HardTrauma and Burns

A 31-year-old woman, G1P0 at 35 weeks gestation, is brought to the emergency department via ambulance following a high-speed frontal motor vehicle collision. She was the restrained driver. Upon arrival, her blood pressure is 78/42 mmHg, pulse is 128/min, and respirations are 24/min. She is pale, diaphoretic, and lethargic. Physical examination reveals a transverse ecchymosis across the lower abdomen. The abdomen is diffusely tender with involuntary guarding. The uterus is firm and exquisitely tender to palpation. Fetal heart rate monitoring demonstrates a baseline of 110/min with absent variability and recurrent late decelerations. An extended focused assessment with sonography for trauma (E-FAST) reveals a large volume of anechoic fluid in the hepatorenal space (Morison pouch). Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate exploratory laparotomyAnswer
  2. B
    Computed tomography scan of the abdomen and pelvis
  3. C
    Maternal left lateral decubitus positioning and supplemental oxygen
  4. D
    Emergency cesarean delivery without intra-abdominal exploration
  5. E
    Continued intravenous crystalloid resuscitation and serial observation

Answer

Immediate exploratory laparotomy
The correct action is immediate exploratory laparotomy. This patient has sustained high-energy blunt abdominal trauma resulting in hemorrhagic shock (hypotension, tachycardia, altered mental status). The positive E-FAST exam confirms that the source of bleeding is intraperitoneal. According to Advanced Trauma Life Support (ATLS) principles, any hemodynamically unstable patient with a positive FAST requires immediate exploratory laparotomy for hemorrhage control. In pregnant trauma patients, the fundamental rule is that the best initial treatment for the fetus is optimal resuscitation of the mother. Although the fetus is in distress (recurrent late decelerations and absent variability) and a concurrent cesarean delivery will likely be performed for surgical exposure and fetal rescue, the primary life-saving intervention directing the patient to the operating room is the exploratory laparotomy to address the intra-abdominal hemorrhage.

Step-by-Step Solution

1
Assess the patient's hemodynamic status.
The patient is in class III/IV hemorrhagic shock, evidenced by a blood pressure of 78/42 mmHg, heart rate of 128/min, and lethargy.
Recognizing shock is the first step in the Advanced Trauma Life Support (ATLS) primary survey.
2
Identify the source of the hemorrhage.
The E-FAST exam shows fluid in the hepatorenal space, confirming intraperitoneal bleeding (likely from a ruptured spleen or liver, given the seatbelt sign).
In blunt trauma, the abdomen is a major source of hidden blood loss.
3
Apply the management algorithm for hemodynamically unstable blunt trauma in pregnancy.
The best maternal resuscitation is the best fetal resuscitation. The patient must be taken immediately to the operating room for an exploratory laparotomy.
Definitive surgical control of hemorrhage is required. While a concurrent cesarean delivery will likely be performed to provide surgical exposure and address the fetal distress, the exploratory laparotomy is the primary life-saving trauma intervention.

Key Concept

Management of hemodynamically unstable blunt abdominal trauma requires immediate exploratory laparotomy, and maternal stabilization is always the highest priority in pregnant trauma patients.
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Topics

Trauma and Burns

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