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Difficulty: HardInitial Stabilization and Triage

A 28-year-old construction worker is transported to the trauma bay via helicopter after being crushed beneath a collapsed concrete retaining wall. On arrival, he is moaning and visibly pale but follows simple commands. His airway is patent, and breath sounds are equal bilaterally. Vital signs show a temperature of 36.2°C (97.2°F), blood pressure of 72/40 mmHg, pulse of 138/min, and respiratory rate of 26/min. Oxygen saturation is 95% on high-flow oxygen. Primary survey reveals massive ecchymoses over the lower abdomen, flanks, and perineum. On gentle palpation, the pubic symphysis feels widely diastatic. There is a small amount of blood visible at the urethral meatus. No obvious external hemorrhage is noted on the extremities or torso. Which of the following interventions should be ordered simultaneously as the initial management for this patient? (Select 2)

  1. Application of a pelvic circumferential compression deviceAnswer
  2. Transfusion of uncrossmatched type O blood productsAnswer
  3. C
    Transport to radiology for a contrast-enhanced CT scan of the abdomen and pelvis
  4. D
    Performance of a retrograde urethrogram
  5. E
    Transfer to the interventional radiology suite for pelvic vessel embolization

Answer

The most appropriate simultaneous initial steps are the application of a pelvic circumferential compression device and the transfusion of uncrossmatched type O blood products.
The correct sequence of events in a patient presenting with decompensated hemorrhagic shock due to an unstable pelvic fracture involves immediate, simultaneous mechanical and resuscitative stabilization. The application of a pelvic circumferential compression device (placed over the greater trochanters, not the iliac crests) reduces the internal volume of the true pelvis, promoting a tamponade effect against bleeding from the presacral venous plexus and exposed cancellous bone. Concurrently, the patient requires immediate restoration of intravascular volume using uncrossmatched group O blood products. Modern trauma protocols emphasize hemostatic resuscitation (blood products) over massive crystalloid infusion to prevent the trauma-induced coagulopathy that exacerbates ongoing hemorrhage.

Step-by-Step Solution

1
Identify the primary mechanism and cause of shock.
The patient has sustained blunt crush trauma resulting in an unstable pelvic fracture and class IV hemorrhagic shock (hypotension, marked tachycardia, pale skin).
Recognizing the triad of trauma, pelvic instability, and profound shock dictates the immediate resuscitation priorities.
2
Select interventions that immediately address the hemorrhagic source.
Apply a pelvic binder and initiate massive transfusion protocol with uncrossmatched blood.
In unstable pelvic fractures, bleeding is predominantly from the presacral venous plexus and fractured bone ends. A binder reduces the pelvic volume to create a tamponade effect, while blood products treat the hypovolemia without diluting clotting factors.
3
Defer secondary diagnostics and definitive treatments.
Postpone CT scans, urethral evaluations, and subspecialty transfers.
Hemodynamic stability must be achieved before moving the patient out of the trauma bay or focusing on localized injuries (like the urethra).

Key Concept

In hemodynamically unstable patients with suspected severe pelvic fractures, immediate management requires simultaneous mechanical volume reduction of the pelvis (using a binder over the greater trochanters) and hemostatic resuscitation with uncrossmatched blood products.
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Topics

Initial Stabilization and Triage

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