Surgical Anatomy & Approaches MCQs

Following a primary total hip arthroplasty via a direct anterior approach, the patient complains of numbness over the anterolateral aspect of the thigh. Motor function of the lower extremity is intact. Which nerve is most likely affected?

The direct anterior approach for total hip arthroplasty utilizes an internervous plane between which two muscles?

A patient undergoes a primary total hip arthroplasty via the direct anterior approach. Postoperatively, she reports numbness and dysesthesia over the anterolateral aspect of her thigh. Which nerve was most likely injured, and what is its anatomic course relative to the surgical interval?

During a direct anterior approach for THA, the surgeon develops the superficial internervous plane. Between which two muscles is this superficial dissection performed?

During a posterior approach to the hip, retractors are placed to expose the posterior column and acetabulum. The patient subsequently develops a dense foot drop postoperatively. Which portion of the affected nerve is most vulnerable to stretch injury in this location and why?

A direct anterior approach to the hip utilizes the internervous plane between the sartorius and the tensor fasciae latae (TFL). Proximal extension of this superficial dissection places which of the following nerves at greatest risk of injury?

During open reduction and internal fixation of a transverse posterior wall acetabular fracture utilizing the Kocher-Langenbeck approach, the knee is maintained in flexion and the hip in extension. This positioning is primarily utilized to protect which of the following structures?

A 72-year-old woman sustains a displaced 4-part proximal humerus fracture. Examination reveals loss of sensation over the lateral deltoid. Which nerve is most likely injured?

During an anterior intrapelvic (modified Stoppa) approach for an acetabular fracture, significant hemorrhage is encountered over the superior pubic ramus. Which of the following vascular structures is most likely injured?

A 21-year-old motorcyclist is thrown from his bike and presents with a massively swollen shoulder and a pulseless upper extremity. Radiographs show lateral displacement of the scapula and a widely displaced clavicle fracture. Which of the following is the most likely neurologic injury associated with this condition?

During the ilioinguinal approach for a transverse acetabular fracture, massive hemorrhage is encountered while dissecting near the superior pubic ramus. This bleeding is most likely due to injury of an anastomosis between which two vascular structures?

A 22-year-old male presents with a closed, distal-third humeral shaft fracture. He is neurologically intact on initial evaluation in the emergency department. Following closed reduction and placement of a coaptation splint, he exhibits a complete wrist drop and inability to extend his metacarpophalangeal joints. What is the most appropriate next step in management?

A 48-year-old male sustains a posterior hip dislocation in a motor vehicle collision. The dislocation is successfully reduced closed in the emergency department within 2 hours of the injury. What is the most significant long-term complication associated with this injury?

A 35-year-old male undergoes open reduction and internal fixation of a transverse posterior wall acetabular fracture via a Kocher-Langenbeck approach. Postoperatively, the patient demonstrates weak ankle dorsiflexion and eversion, but normal plantarflexion. Which nerve was most likely injured during the procedure?

A 40-year-old man presents to the emergency department with a posterior hip dislocation and an associated posterior wall acetabular fracture following a dashboard injury. Which nerve is most commonly injured in this specific clinical scenario?

A 35-year-old man sustains an acetabular fracture as seen in the representative imaging

. CT reveals a fracture involving the anterior column and posterior hemitransverse with the "gull sign" present on the anteroposterior view. Which surgical approach is most appropriate?

A 25-year-old male sustains a closed transverse midshaft humerus fracture. He is neurologically intact on initial presentation and placed in a coaptation splint. Two weeks later at follow-up, he exhibits a complete radial nerve palsy. What is the most appropriate management?

A 32-year-old woman is involved in a high-speed motor vehicle collision and suffers a posterior hip dislocation. Closed reduction in the emergency department is unsuccessful. A CT scan reveals an intra-articular osteochondral fragment physically blocking the reduction. Which surgical approach is most appropriate to extract the fragment and reduce the hip?

A 45-year-old manual laborer undergoes an open subpectoral biceps tenodesis. In the recovery room, the patient complains of numbness over the lateral aspect of his forearm and profound weakness in elbow flexion. Which of the following nerves was most likely injured during the procedure?

A 35-year-old man sustained a highly comminuted proximal humerus fracture and is scheduled for operative fixation. Postoperatively, he is noted to have a sensory deficit over the lateral aspect of his shoulder and weakness in external rotation.

Which space did the likely injured nerve pass through to innervate the affected muscle?