Surgical Anatomy & Approaches MCQs

During a direct anterior approach for total hip arthroplasty, the superficial inter-nervous plane is developed between muscles innervated by which two nerves?

When performing a Kocher-Langenbeck approach for a posterior wall acetabular fracture, maintaining the hip in which position minimizes tension on the sciatic nerve?

Following a proximal humerus fracture, a patient demonstrates profound weakness in shoulder abduction and decreased sensation over the lateral deltoid. Through which anatomic space does the injured nerve typically exit the axilla?

During a modified Stoppa approach for anterior column acetabular fixation, the surgeon must identify the corona mortis. At what approximate distance from the pubic symphysis is this anastomosis typically located?

A 32-year-old male sustains an acetabular fracture demonstrating disruption of the ilioischial line and a large posterior wall fragment, with an intact iliopectineal line. Which surgical approach provides the most optimal access for reducing and fixing this specific fracture pattern?

During open reduction and internal fixation of an anterior column acetabular fracture via an ilioinguinal approach, massive hemorrhage is encountered while dissecting posterior to the superior pubic ramus. This bleeding is most likely originating from the corona mortis, an anastomosis between which two vascular structures?

A 30-year-old male sustains a posterior wall acetabular fracture with an associated posterior hip dislocation. On physical examination, he has a profound foot drop and inability to extend his toes. Which specific portion of the sciatic nerve is most commonly injured in this scenario, and what is its anatomic position within the greater sciatic notch?

A 62-year-old male is undergoing a total shoulder arthroplasty via the deltopectoral approach. During the initial dissection of the deltopectoral interval, the surgeon identifies the cephalic vein. Which of the following is the most appropriate management strategy for the cephalic vein, and why?

A 48-year-old competitive tennis player presents with recurrent anterior shoulder instability and significant anterior glenoid bone loss, confirmed by a pre-operative CT scan. The surgeon plans a Latarjet procedure via the deltopectoral approach. During the deep dissection, after retracting the conjoined tendon medially, which critical neurovascular structure is most vulnerable to injury if extreme or uncontrolled medial retraction is applied?

A 28-year-old male collegiate football player sustains a displaced surgical neck fracture of the humerus. Open reduction and internal fixation (ORIF) is planned via the deltopectoral approach. During the approach, the surgeon identifies the deltoid and pectoralis major muscles. What is the correct innervation for these two muscles, respectively, highlighting the internervous plane?

During a direct anterior approach for a total hip arthroplasty, the ascending branch of the lateral femoral circumflex artery is encountered. In which internervous plane does this surgical approach initially proceed?

During the inferior capsular release for a total shoulder arthroplasty, the axillary nerve is at greatest risk. What is its typical anatomic relationship to the inferior glenohumeral capsule?

The axillary nerve is a critical structure at risk during shoulder arthroplasty. During the inferior capsular release, what is the approximate average distance from the inferior margin of the glenoid rim to the axillary nerve?

A 70-year-old male undergoes a primary total hip arthroplasty via the direct anterior approach. Postoperatively, he has profound numbness over the anterolateral thigh but normal quadriceps strength. Which inter-nervous plane was utilized, and what nerve is likely affected?

When placing the glenosphere baseplate during a reverse total shoulder arthroplasty, peripheral locking screws are utilized for fixation. Aiming the anterior screw excessively far anteriorly risks injury to which neurovascular structure?

During a primary total hip arthroplasty utilizing the direct anterior approach, the surgeon develops the superficial internervous plane. To minimize the risk of denervation, the surgeon must remember that this interval is bordered by muscles supplied by which two nerves?

A 65-year-old female undergoes a complex primary total hip arthroplasty requiring 4 cm of leg lengthening. Postoperatively, she exhibits a foot drop and numbness in the first dorsal web space, but retains normal plantar flexion. Which nerve division is most likely injured, and what anatomic feature makes it particularly susceptible?

A 32-year-old male undergoes an ilioinguinal approach for a displaced anterior column acetabular fracture. Postoperatively, he complains of numbness and a burning sensation over the anterolateral aspect of his ipsilateral thigh. Which nerve was most likely injured or irritated during the procedure?

The image below depicts the lateral window of the ilioinguinal approach. Which of the following structures are typically detached from the ASIS and retracted laterally to develop this window?

During an ilioinguinal approach for a complex acetabular fracture, a surgeon encounters significant difficulty retracting the femoral neurovascular bundle in the middle window. Despite careful technique, the patient develops a new, profound ipsilateral lower extremity weakness and an absent femoral pulse post-operatively. Which of the following is the most appropriate immediate management step?