ABOS Part I Comprehensive Review - Batch 27

Question 1

A 32-year-old male sustains a high-energy motor vehicle collision resulting in a displaced anterior column acetabular fracture. During open reduction and internal fixation via the Smith-Petersen approach, the surgeon identifies the primary internervo

Accepted Answer

C. Sartorius (femoral nerve) and tensor fascia lata (superior gluteal nerve)

Question 2

A 58-year-old female undergoes a revision total hip arthroplasty via the Smith-Petersen approach for a loose acetabular component. Two weeks post-operatively, she complains of persistent numbness, burning, and dysesthesia over the anterolateral aspec

Accepted Answer

D. Lateral femoral cutaneous nerve; exits the pelvis typically inferior to the ASIS and courses inferomedially, often piercing or passing deep to the sartorius or TFL.

Question 3

During the deep dissection phase of a Smith-Petersen approach for an anterior column acetabular fracture, after detaching the direct and indirect heads of the rectus femoris and reflecting the muscle distally and laterally, the surgical team encounte

Accepted Answer

C. Ascending branch of the lateral circumflex femoral artery

Question 4

A 28-year-old male presents to the emergency department after a motorcycle accident. Radiographs and a CT scan reveal a displaced acetabular fracture with a fracture line extending from the iliac crest through the ASIS, anterior wall, and quadrilater

Accepted Answer

C. Anterior column fracture

Question 5

A 72-year-old patient with a history of severe peripheral vascular disease, uncontrolled diabetes (HbA1c 10.5%), and active cellulitis overlying the hip region presents with a displaced anterior column acetabular fracture. The orthopedic trauma surge

Accepted Answer

E. Active cellulitis in the surgical field

Question 6

A surgical resident is preparing a patient for a Smith-Petersen approach to address developmental dysplasia of the hip (DDH) requiring a pelvic osteotomy. The patient is positioned supine on a radiolucent operating table. To optimize exposure of the

Accepted Answer

B. To internally rotate the pelvis, bringing the ASIS and iliac crest more anteriorly.

Question 7

A 40-year-old male is undergoing a Smith-Petersen approach for open reduction and internal fixation of a complex anterior column acetabular fracture. During deep dissection, the surgeon requires extensive medial exposure to access the pubic ramus and

Accepted Answer

D. Femoral nerve and vessels

Question 8

A 65-year-old patient is undergoing a primary total hip arthroplasty via a modified Smith-Petersen (direct anterior) approach. During exposure of the hip capsule, the surgeon notes a strong, inverted Y-shaped ligament reinforcing the anterior aspect

Accepted Answer

D. Iliofemoral ligament (Ligament of Bigelow); prevents hyperextension.

Question 9

A 35-year-old male undergoes open reduction and internal fixation of a complex acetabular fracture via the Smith-Petersen approach. He has a history of ankylosing spondylitis and a previous episode of heterotopic ossification (HO) following a shoulde

Accepted Answer

C. A single dose of post-operative radiation therapy (PORT) within 72 hours of surgery.

Question 10

A 12-year-old patient is scheduled for a Salter osteotomy for developmental dysplasia of the hip (DDH) via the Smith-Petersen approach. During the deep muscular dissection, the surgeon needs to reflect the rectus femoris muscle to expose the anterior

Accepted Answer

B. Direct head from the anterior superior iliac spine (ASIS); Indirect head from the anterior inferior iliac spine (AIIS).

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Key Takeaway