Gross Anatomy USMLE Step 1 Practice Question
A 33-year-old man sustains a posterior knee dislocation during a motorcycle crash. On examination, his blood pressure is 128/82 mmHg, heart rate 102 bpm, and the affected leg shows faint distal pulses with cool skin temperature distally. Several hours later, ankle-brachial index is 0.6 on the injured side. Doppler ultrasound reveals diminished arterial flow. Sensation and motor function remain intact. Injury to which of the following structures is most likely responsible for the limb-threatening ischemia in this setting?
Answer choices
- APosterior tibial artery
- BFibular artery
- CFemoral artery
- DAnterior tibial artery
- EPopliteal arteryCorrect answer
- FDeep femoral (profunda femoris) artery
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