2. Trauma MCQs

A 45-year-old sustains a displaced subcapital femoral neck fracture. The primary blood supply to the adult femoral head is disrupted. Which vessel is the predominant contributor to this supply?

A patient develops avascular necrosis of the proximal pole of the scaphoid following a nonunion. The predominant blood supply to the scaphoid enters at which anatomical location?

During a syndesmotic fixation for an ankle fracture, the surgeon visualizes the anterior inferior tibiofibular ligament (AITFL). At its distal insertion on the fibula, what specific tubercle does the AITFL attach to?

During open reduction and internal fixation of a medial malleolus fracture, a retractor is placed posterior to the medial malleolus. Which of the following structures is most anterior in the retro-malleolar groove and at highest risk of injury?

During a posteromedial surgical approach to the tibial plateau for internal fixation of a shear fracture, the surgeon dissects between the medial head of the gastrocnemius and the popliteus. Which major neurovascular structures are immediately at risk in this deep interval?

A patient suffers a severe compartment syndrome of the anterior leg. Following fasciotomy, the patient has an irreversible loss of function of the deep peroneal nerve. Which of the following sensory deficits will definitively be present?

Following a displaced femoral neck fracture in an adult, the femoral head is at high risk for osteonecrosis. The most significant contributor to the vascular supply of the adult femoral head is the:

An intracapsular femoral neck fracture frequently compromises the blood supply to the femoral head. Which artery provides the primary blood supply to the mature adult femoral head?

The anterior bundle of the ulnar collateral ligament (UCL) of the elbow is the primary restraint to valgus stress. Where is its primary anatomical insertion on the ulna?

Avascular necrosis of the proximal pole of the scaphoid is a known complication following a waist fracture. This occurs because the primary arterial supply to the scaphoid enters at which location?

A patient undergoes a two-incision fasciotomy for a tibial shaft fracture complicated by compartment syndrome. Which muscle group must be carefully identified and released to ensure adequate decompression of the deep posterior compartment?

During a medial approach to the distal tibia for minimally invasive plating of a pilon fracture, the surgeon must protect the saphenous nerve. Which vascular structure closely travels with the saphenous nerve in this region?

A 45-year-old sustains a displaced femoral neck fracture. Which of the following vessels provides the primary blood supply to the adult femoral head and is at greatest risk of disruption in this injury?

During open reduction internal fixation of a medial malleolus fracture, the surgeon explores the structures posterior to the medial malleolus. Moving from anterior to posterior, which structure lies immediately posterior to the flexor digitorum longus (FDL) tendon?

A patient with an unstable pelvic ring fracture requires percutaneous iliosacral screw fixation at the S1 level. If the screw trajectory is placed too far anteriorly and inferiorly to the sacral ala, which nerve root is at highest risk of iatrogenic injury?

A runner requires a lateral compartment fasciotomy for chronic exertional compartment syndrome. The surgeon must protect the superficial peroneal nerve. At what anatomical location does this nerve typically pierce the deep fascia to become subcutaneous?

A 26-year-old female presents with acute knee pain after a twisting injury while skiing. Plain radiographs demonstrate a small avulsion fracture from the lateral tibial plateau just distal to the articular surface. This radiographic finding is virtually pathognomonic for a concurrent tear of which of the following structures?

An AP radiograph of a 30-year-old skier's knee following an acute pivoting injury demonstrates a small elliptical avulsion fracture of the lateral tibial plateau, just distal to the joint line. This radiographic finding is most highly associated with an injury to which of the following structures?

A patient presents with a knee injury sustained from a blow to the anterolateral aspect of the flexed knee. Clinical examination reveals anteromedial rotatory instability (AMRI), characterized by valgus laxity and anterior subluxation of the medial tibial plateau. Which primary structure of the posteromedial corner is injured?

A 30-year-old male is brought to the trauma bay after a high-speed motorcycle collision. Examination of his right lower extremity reveals a grossly unstable knee with positive anterior, posterior, and valgus stress testing. The foot is warm, and dorsalis pedis pulses are palpable. The Ankle-Brachial Index (ABI) is measured at 0.8. What is the most appropriate next step in management?