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Difficulty: HardTrauma and Burns

Following a high-velocity motor vehicle collision, a 28-year-old male is admitted to the trauma resuscitation unit. He was extricated from the driver's seat after a prolonged entrapment. The patient is intubated and mechanically ventilated upon arrival. Initial vital signs demonstrate a blood pressure of 72/38 mm Hg and a heart rate of 144/min. Physical examination of the head reveals a right-sided pupil that measures 8 mm and does not react to light, whereas the left pupil is 3 mm and briskly reactive. The thorax exhibits equal breath sounds bilaterally. The abdomen is markedly distended and firm. Bedside ultrasonography reveals large anechoic spaces in the hepatorenal recess and the splenorenal recess. Which of the following is the most appropriate next step in management?

  1. A
    Computed tomography of the head and abdomen
  2. B
    Administration of intravenous mannitol
  3. C
    Diagnostic peritoneal lavage
  4. Exploratory laparotomyAnswer
  5. E
    Trephination of the right temporal skull

Answer

Exploratory laparotomy
The correct answer is exploratory laparotomy. This patient presents with complex polytrauma, exhibiting signs of severe hemorrhagic shock (hypotension, tachycardia, and a positive FAST exam indicating massive hemoperitoneum) as well as impending uncal herniation (a blown, unreactive pupil). According to Advanced Trauma Life Support (ATLS) principles, the primary survey must address life-threatening injuries in strict alphabetical order: Airway, Breathing, Circulation, Disability, and Exposure. Although the patient's traumatic brain injury and potential herniation (Disability) are life-threatening, his exsanguinating intra-abdominal hemorrhage (Circulation) takes immediate precedence. Without rapid hemostasis via exploratory laparotomy, the patient will suffer fatal cardiovascular collapse. Furthermore, cerebral perfusion pressure (CPP = MAP - ICP) relies on adequate mean arterial pressure; therefore, correcting the hemorrhagic shock is paradoxically one of the most critical initial neuroprotective interventions for his traumatic brain injury.

Step-by-Step Solution

1
Assess the patient's primary survey priorities based on the clinical presentation.
The airway is secure (intubated), breathing is intact (equal breath sounds), but circulation is severely compromised (shock, positive FAST), and disability is abnormal (anisocoria indicating possible herniation).
The Advanced Trauma Life Support (ATLS) protocol dictates a strict sequential approach (ABCDE) to managing life-threatening injuries.
2
Evaluate the competing life threats of hemorrhagic shock and intracranial hypertension.
Hemorrhagic shock, identified by profound hypotension and massive intra-abdominal free fluid, takes immediate precedence over the traumatic brain injury.
Untreated hemorrhagic shock leads to imminent cardiac arrest. Furthermore, cerebral perfusion pressure relies on adequate mean arterial pressure; restoring blood pressure is a critical neuroprotective measure.
3
Determine the definitive intervention for the primary life threat.
The patient requires immediate surgical hemostasis in the operating room.
In a hemodynamically unstable patient with a clearly identified source of intra-abdominal hemorrhage (positive FAST), immediate exploratory laparotomy is indicated without delaying for advanced imaging.

Key Concept

Prioritization of ATLS Primary Survey (Circulation over Disability) in unstable polytrauma patients
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Topics

Trauma and Burns

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