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Difficulty: HardSurgical and Procedural Interventions

Emergency medical services arrive at the trauma bay with a 38-year-old male construction worker who fell approximately 20 feet (6 meters) from scaffolding, landing on his side. He is groaning and diaphoretic upon arrival.

Upon transfer to the trauma stretcher, his vital signs are:
Temperature: 36.4°C (97.5°F)
Blood pressure: 76/42 mm Hg
Heart rate: 142/min
Respiratory rate: 24/min
Oxygen saturation: 98% on high-flow oxygen

Primary survey confirms a secure airway and equal breath sounds bilaterally. His abdomen is soft and non-distended. Gentle compression of the iliac crests reveals marked mechanical instability of the pelvic ring. Inspection of the perineum demonstrates a rapidly expanding scrotal hematoma and a drop of blood at the urethral meatus.

A Focused Assessment with Sonography for Trauma (FAST) examination shows no pericardial or intra-abdominal free fluid. The trauma team secures bilateral large-bore intravenous access and initiates the massive transfusion protocol with uncrossmatched blood products.

To appropriately manage this patient's life-threatening injuries, which of the following procedural and management steps are INDICATED? (Select all that apply)

  1. Placement of a pelvic binder centered over the greater trochantersAnswer
  2. Pelvic angioembolization or preperitoneal pelvic packing if shock persistsAnswer
  3. C
    Immediate transfer to the CT scanner to identify the exact site of bleeding
  4. D
    Insertion of a transurethral Foley catheter to monitor end-organ perfusion
  5. E
    Emergent exploratory laparotomy to rule out occult intra-abdominal hemorrhage

Answer

The correct steps are the placement of a pelvic binder centered over the greater trochanters and arranging for pelvic angioembolization or preperitoneal packing if hemodynamic instability persists.
This patient is in profound hemorrhagic shock due to an unstable pelvic fracture, as evidenced by mechanical instability and a negative FAST exam indicating the hemorrhage is confined to the retroperitoneal space. The immediate, mandatory step is to reduce the pelvic volume and stabilize the fracture to promote tamponade of the bleeding presacral venous plexus. This is accomplished non-invasively by placing a pelvic binder centered over the greater trochanters. If the patient remains unstable despite blood product resuscitation and a pelvic binder, it indicates ongoing, likely arterial, hemorrhage. In such cases, emergent procedural intervention with either preperitoneal pelvic packing or pelvic angioembolization is necessary to achieve definitive hemostasis.

Step-by-Step Solution

1
Assess the patient's hemodynamic status and injury mechanism.
The patient is in hemorrhagic shock (blood pressure 76/42 mm Hg) following a high-energy fall.
Identifying hemorrhagic shock mandates immediate initiation of resuscitation and search for the bleeding source.
2
Localize the primary source of hemorrhage using primary survey and FAST exam.
FAST is negative for intra-abdominal fluid, but the pelvic ring is mechanically unstable.
A negative FAST in the setting of shock and pelvic instability localizes the life-threatening hemorrhage to the retroperitoneal space.
3
Determine the mandatory initial procedural interventions for an unstable pelvic fracture.
Immediate mechanical stabilization is required to reduce pelvic volume.
Applying a pelvic binder over the greater trochanters limits pelvic volume and facilitates the tamponade of retroperitoneal venous bleeding.
4
Determine the next appropriate procedural step if the patient remains unstable despite initial measures.
Preperitoneal pelvic packing or angioembolization must be performed.
Continued shock indicates ongoing arterial or severe venous bleeding that requires direct procedural control, rather than observation or unindicated laparotomy.
5
Identify absolute contraindications based on the physical examination.
The presence of blood at the urethral meatus contraindicates blind Foley catheter placement.
Inserting a catheter could exacerbate a traumatic urethral injury; a retrograde urethrogram is required once the patient is hemodynamically stable.

Key Concept

The acute management of hemodynamically unstable pelvic fractures prioritizes mechanical stabilization (pelvic binder) followed by direct procedural hemostasis (angioembolization or preperitoneal packing) if shock persists, while avoiding interventions that delay resuscitation (CT scan) or disrupt retroperitoneal tamponade (exploratory laparotomy).
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Topics

Surgical and Procedural Interventions

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