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?
- A)Posterior tibial artery
- B)Fibular artery
- C)Femoral artery
- D)Anterior tibial artery
- E)Popliteal arteryGABARITO
Explicação
The popliteal artery is fixed proximally and distally within the popliteal fossa, making it highly vulnerable to traction and intimal injury during knee dislocations. Delayed ischemia after this mechanism should raise immediate concern for popliteal artery dam... Ver explicação completa e trilha adaptativa →