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Difficulty: HardInitial Stabilization and Triage

A 32-year-old woman is brought to the emergency department by paramedics following a high-speed motor vehicle collision. She was the unrestrained driver of a vehicle that struck a concrete barrier. She complains of severe lower abdominal and pelvic pain. Past medical history is unremarkable. Vital signs reveal a temperature of 36.6°C (97.9°F), blood pressure of 72/40 mm Hg, pulse of 138/min, respirations of 26/min, and oxygen saturation of 96% on supplemental oxygen. She is pale, diaphoretic, and restless. Her airway is patent, and breath sounds are present and equal bilaterally. The abdomen is non-distended but tender in the suprapubic region. A pelvic examination demonstrates mechanical instability with anterior-posterior compression. No active external hemorrhage is noted. Two large-bore intravenous lines are established, and a massive transfusion protocol is initiated. Which of the following is the most urgent next step in the stabilization of this patient?

  1. Application of a circumferential pelvic compression deviceAnswer
  2. B
    Computed tomography angiography of the abdomen and pelvis
  3. C
    Immediate transfer to the operating room for exploratory laparotomy
  4. D
    Urgent consultation for interventional radiology embolization
  5. E
    Retrograde urethrography to evaluate for urethral injury

Answer

Application of a circumferential pelvic compression device
In a hemodynamically unstable patient with a suspected pelvic fracture (evidenced by mechanical instability on physical exam and signs of hemorrhagic shock), the immediate priority after securing the airway and breathing is circulatory stabilization. Pelvic fractures can cause massive retroperitoneal bleeding, primarily from the presacral venous plexus and fractured bone ends. Applying a circumferential pelvic compression device (pelvic binder) is the most urgent next step because it mechanically reduces the pelvic volume, promotes a tamponade effect on venous bleeding, and stabilizes bony fragments to prevent further vascular injury. It is a rapid, non-invasive maneuver that should be performed immediately alongside fluid and blood product resuscitation, prior to definitive imaging or surgical interventions.

Step-by-Step Solution

1
Assess the primary survey (ABCDE) status of the trauma patient.
Airway and Breathing are intact, but Circulation is severely compromised (hypotensive shock).
Life-threatening injuries must be identified and treated in sequence according to ATLS protocols.
2
Identify the likely source of hemorrhagic shock.
The physical examination reveals a mechanically unstable pelvis, highly suggestive of a major pelvic ring disruption with retroperitoneal bleeding.
The pelvis can hold massive amounts of blood, primarily from the presacral venous plexus and fractured cancellous bone.
3
Select the immediate stabilization intervention for the identified source.
A circumferential pelvic compression device (pelvic binder) is indicated.
The binder mechanically stabilizes the fracture, reduces pelvic volume, and promotes a tamponade effect to control life-threatening venous hemorrhage.

Key Concept

In hemodynamically unstable patients with pelvic fractures, the immediate circulatory stabilization priority is mechanical reduction of the pelvis with a binder to control retroperitoneal venous hemorrhage.
Estimated Time:1m 15s
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Topics

Initial Stabilization and Triage

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