2. Trauma MCQs

A 35-year-old sustains a displaced femoral neck fracture. Which of the following arteries provides the majority of the blood supply to the weight-bearing dome of the femoral head?

A patient develops acute compartment syndrome in the anterior compartment of the leg following a high-energy tibial shaft fracture. Which of the following sensory deficits would most likely be observed if the nerve traversing this compartment becomes ischemic?

A 24-year-old man falls on an outstretched hand and sustains a displaced fracture through the proximal pole of the scaphoid. What anatomical feature of the scaphoid's blood supply predisposes this specific fracture pattern to nonunion and osteonecrosis?

A 30-year-old male sustains a closed midshaft humerus fracture. Examination reveals an inability to extend the wrist and fingers, with decreased sensation over the dorsal web space. The injured nerve penetrates which structure as it transitions from the posterior to the anterior compartment of the arm?

A patient undergoes fasciotomies for compartment syndrome of the foot following a crush injury. The surgeon plans to release the compartment that contains the quadratus plantae muscle. Which compartment is this?

A 24-year-old man develops compartment syndrome of the forearm following a crush injury. The surgeon plans a volar release. Which of the following muscles is included in the mobile wad of Henry?

A 65-year-old woman sustains a displaced femoral neck fracture. Which of the following arteries provides the predominant blood supply to the weight-bearing dome of the femoral head in an adult?

A patient sustains a midshaft humerus fracture and presents with a wrist drop. The radial nerve is at highest risk where it pierces the lateral intermuscular septum. At what approximate distance proximal to the lateral epicondyle does the radial nerve pierce the septum?

A 32-year-old man develops acute compartment syndrome of the leg following a high-energy tibial shaft fracture. A dual-incision, four-compartment fasciotomy is performed. During release of the deep posterior compartment, which specific muscle is most frequently missed and inadequately decompressed?

During a posterolateral approach to the tibial plateau, the common peroneal nerve must be carefully identified and protected. As it wraps around the fibular neck, it passes between the two heads of which muscle?

A 55-year-old man presents with an unstable proximal humerus fracture. During the deltopectoral approach, the cephalic vein is identified. The cephalic vein lies in the deltopectoral groove between the deltoid and pectoralis major. To which structure should the vein be retracted to minimize the risk of tearing its primary tributary branches?

A patient with an impending pathologic fracture of the distal femur undergoes prophylactic fixation. The femoral artery becomes the popliteal artery as it passes through the adductor hiatus. The adductor hiatus is formed by the tendinous insertions of which muscle?

Fasciotomy of the leg is planned for a patient with compartment syndrome. When releasing the lateral compartment, which nerve is most at risk of injury as it exits the deep fascia to become subcutaneous in the distal third of the leg?

In a displaced femoral neck fracture, the main blood supply to the adult femoral head is disrupted. This critical vascular supply predominantly arises from which of the following?

A surgeon performing an extensile lateral approach to the calcaneus for a highly comminuted intra-articular fracture must be cautious to avoid devascularizing the lateral skin flap. The primary blood supply to this surgical flap is derived from which of the following arteries?

A 45-year-old male requires a subtrochanteric fracture fixation using a cephalomedullary nail. During the lateral approach for distal locking screw placement, a branch of the profunda femoris artery is at risk. The first perforating artery typically pierces which of the following structures?

A patient with a displaced proximal pole scaphoid fracture is counseled regarding the high risk of nonunion and avascular necrosis. This risk is primarily due to the retrograde blood supply of the scaphoid. The major vascular contribution enters the scaphoid at which specific location?

A patient develops acute compartment syndrome of the leg after a high-energy tibia fracture. A four-compartment fasciotomy is planned. Which of the following muscles is located within the deep posterior compartment of the lower leg?

A 35-year-old sustains an Essex-Lopresti injury, characterized by a radial head fracture, distal radioulnar joint dislocation, and rupture of the interosseous membrane (IOM). In the anatomical position, what is the correct orientation of the fibers of the central band of the forearm IOM?

A 65-year-old female sustains a displaced femoral neck fracture. Which artery provides the predominant blood supply to the adult femoral head, placing it at high risk of avascular necrosis in this fracture pattern?