A 24-year-old man is brought to the emergency department after a severe hyperextension injury to his right knee sustained during a rugby match. He is in severe pain. Physical examination reveals gross deformity of the right knee with a prominent medial femoral condyle. The right foot is slightly cool, and the right dorsalis pedis and posterior tibial pulses are palpable but noticeably weaker than those on the left. Capillary refill is 3 seconds in the right toes. Motor and sensory functions in the right foot are intact. Arrange the following steps in the most appropriate chronological sequence for evaluating and managing this patient's limb.
- 1Closed reduction of the right knee joint
- 2Measurement of the ankle-brachial index (ABI)
- 3Computed tomography (CT) angiography of the right lower extremity
- 4Operative vascular repair
Cevap
The correct sequence is: Closed reduction of the right knee joint, followed by Measurement of the ankle-brachial index (ABI), then Computed tomography (CT) angiography of the right lower extremity, and finally Operative vascular repair.
The proper sequence for managing a patient with a knee dislocation and soft signs of vascular injury (such as diminished, asymmetric pulses) begins with immediate closed reduction to relieve pressure on the popliteal artery. Following reduction, the vascular status must be objectively quantified using the ankle-brachial index (ABI). An ABI less than 0.9 indicates impaired perfusion and warrants advanced imaging with CT angiography to localize the injury. Finally, if CT angiography confirms an arterial injury, operative vascular repair is required.
Adım Adım Çözüm
Anahtar Kavram
Algorithm for evaluating and managing knee dislocation with suspected popliteal artery injury (soft signs of vascular compromise).