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Difficulty: MediumInitial Stabilization and Triage

A 42-year-old male is transported to the emergency department after losing control of his motorcycle and colliding with a concrete barrier at high speed. He is awake but confused, complaining of excruciating pain in his lower abdomen and pelvic region. On physical examination, he appears pale and profoundly diaphoretic. His temperature is 36.5°C (97.7°F), blood pressure is 74/42 mm Hg, pulse is 135/min, and respirations are 26/min. The airway is patent, and breath sounds are equal bilaterally. The abdomen is soft and non-distended. Gentle anteroposterior compression of the iliac crests reveals marked mechanical instability of the pelvic ring. Inspection of the perineum shows a scrotal hematoma and a small amount of blood at the urethral meatus. Bilateral lower extremity pulses are weak but symmetric. A focused assessment with sonography for trauma (FAST) demonstrates no free fluid in the peritoneal cavity or pericardial sac. Which of the following is the most appropriate next step in the immediate management of this patient?

  1. Application of a circumferential pelvic binderAnswer
  2. B
    Computed tomography angiography of the abdomen and pelvis
  3. C
    Immediate exploratory laparotomy
  4. D
    Urgent consultation with orthopedic surgery
  5. E
    Performance of a retrograde urethrogram

Answer

Application of a circumferential pelvic binder
The correct answer involves the immediate application of a circumferential pelvic binder. This patient is presenting with hemorrhagic shock resulting from an unstable pelvic fracture, as evidenced by profound hypotension, marked tachycardia, and direct physical signs of pelvic ring disruption. In major trauma, initial stabilization follows the ABCDE protocol. With airway and breathing intact, attention shifts to circulation. Because the FAST scan is negative, massive intraperitoneal bleeding is unlikely, pointing to the retroperitoneal space and pelvic venous plexus as the source of hemorrhage. The most urgent and effective initial maneuver is to mechanically reduce the volume of the true pelvis using a commercial binder or a tied sheet centered over the greater trochanters. This creates a tamponade effect, significantly slowing venous bleeding and stabilizing the fractured bone ends, bridging the patient to definitive management (such as preperitoneal packing or angioembolization).

Step-by-Step Solution

1
Assess the patient's hemodynamic status and recognize shock.
The patient is hypotensive (74/42 mm Hg) and tachycardic (135/min) after major blunt trauma, indicating Class III or IV hemorrhagic shock.
Immediate recognition of life-threatening hemorrhagic shock prioritizes interventions directed at 'C' (Circulation) in the ABCDE primary survey.
2
Identify the primary source of hemorrhage based on clinical findings.
The chest is clear, and the FAST exam is negative, ruling out massive hemothorax or intraperitoneal bleeding. The mechanical instability of the pelvic ring localizes the massive bleeding to the retroperitoneal pelvic venous plexus.
Identifying the anatomic source dictates the appropriate mechanical stabilization technique.
3
Select the single most urgent initial stabilization step.
A pelvic binder is applied immediately around the greater trochanters.
This non-invasive mechanical intervention rapidly reduces pelvic volume, promoting tamponade of bleeding veins and stabilizing bone ends to prevent further hemorrhage before definitive care.

Key Concept

In patients with blunt trauma, hemorrhagic shock, and an unstable pelvic fracture (with a negative FAST), the immediate next step in stabilization is the application of a circumferential pelvic binder to mechanically reduce pelvic volume and control retroperitoneal venous bleeding.

Alternative Method

In resource-limited settings or prehospital environments without access to a commercial pelvic binder, a standard bedsheet can be folded, wrapped tightly around the greater trochanters, and clamped or tied to achieve a similar life-saving reduction of pelvic volume.
Estimated Time:1m 30s
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Topics

Initial Stabilization and Triage

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