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Difficulty: Very hardSurgical and Procedural Interventions

Emergency medical services bring a 71-year-old man to the resuscitation bay after he experienced agonizing, sudden-onset pain in his lower back and abdomen while doing yard work. His past medical history includes hypertension, hyperlipidemia, and a 40-pack-year smoking history. On arrival, he appears ashen and diaphoretic, and he is lethargic but arousable to painful stimuli.

Vital SignValue
Temperature36.4∘C36.4^\circ\text{C} (97.5∘F97.5^\circ\text{F})
Blood pressure74/42 mm Hg74/42\text{ mm Hg}
Pulse128/min128/\text{min}
Respirations22/min22/\text{min}

Physical examination reveals a prominent, expansile, pulsatile mass in the periumbilical region. The bilateral femoral pulses are weak and thready. Two large-bore peripheral intravenous catheters are rapidly secured.

Which of the following interventions are indicated in the immediate management of this patient? (Select all that apply)

  1. Immediate transfer to the operating room for surgical explorationAnswer
  2. Activation of the massive transfusion protocol for balanced blood product administrationAnswer
  3. Targeted resuscitation to maintain permissive hypotension (systolic blood pressure 8080 to 90 mm Hg90\text{ mm Hg})Answer
  4. D
    Computed tomography angiography of the abdomen to delineate aneurysm anatomy
  5. E
    Intravenous administration of a short-acting beta-blocker to reduce aortic shear stress
  6. F
    Transthoracic echocardiography to definitively assess left ventricular function prior to operative transfer

Answer

The correct interventions are immediate transfer to the operating room for surgical exploration, activation of the massive transfusion protocol, and targeted resuscitation to maintain permissive hypotension.
The correct interventions directly address the immediate life-threats of a ruptured abdominal aortic aneurysm. Immediate transfer to the operating room ensures rapid source control, which is the only definitive treatment. Activating the massive transfusion protocol provides necessary oxygen-carrying capacity and clotting factors. Maintaining permissive hypotension (8080 to 90 mm Hg90\text{ mm Hg}) provides enough perfusion for vital organs while minimizing the risk of 'popping the clot' and worsening the retroperitoneal hemorrhage before the aorta is clamped.

Step-by-Step Solution

1
Identify the primary diagnosis based on the clinical triad.
The combination of sudden-onset back/abdominal pain, profound hypotension, and a pulsatile abdominal mass strongly indicates a ruptured abdominal aortic aneurysm (rAAA).
Recognizing this life-threatening emergency is the prerequisite for initiating appropriate trauma and vascular resuscitation pathways.
2
Determine the optimal disposition for an unstable patient requiring source control.
The patient must be transferred immediately to the operating room.
Definitive surgical exploration and repair is the only intervention that can achieve hemorrhage control; all imaging and non-essential testing must be bypassed to prevent death.
3
Establish the correct resuscitation strategy for hemorrhagic shock with a contained retroperitoneal bleed.
Activate the massive transfusion protocol and target permissive hypotension (8080 to 90 mm Hg90\text{ mm Hg} systolic).
Massive transfusion addresses coagulopathy and oxygen-carrying capacity, while permissive hypotension prevents the disruption of the fragile retroperitoneal clot before proximal aortic control is achieved.

Key Concept

The acute management of a ruptured abdominal aortic aneurysm in a hemodynamically unstable patient requires immediate surgical source control, massive transfusion, and permissive hypotension, while strictly avoiding imaging delays and contraindicated medications like beta-blockers.
Estimated Time:1m 30s
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Topics

Surgical and Procedural Interventions

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