ABOS Part I Comprehensive Review - Batch 16

Question 1

A 28-year-old male presents to the emergency department after a high-energy motor vehicle accident resulting in a knee dislocation. On initial assessment, the knee is grossly deformed. After successful closed reduction, palpable dorsalis pedis and po

Accepted Answer

Order an immediate CT angiogram (CTA) of the affected limb.

Question 2

A 35-year-old collegiate football player sustains a knee injury during a game, characterized by a direct blow to the proximal tibia with the knee flexed, resulting in a posterior knee dislocation (Schenck KD II). After successful reduction, the knee

Accepted Answer

Posterolateral corner (PLC)

Question 3

A 42-year-old obese male presents to the emergency department after a low-energy fall where his knee hyperextended. On examination, the tibia is visibly displaced anterior to the femur, and the knee is locked in extension. Distal pulses are present a

Accepted Answer

KD I (Anterior)

Question 4

A 22-year-old male presents to the emergency department with a knee dislocation after a motorcycle accident. Initial assessment reveals a grossly deformed knee, absent dorsalis pedis and posterior tibial pulses, and a cold, pale foot. After immediate

Accepted Answer

Persistent vascular compromise after reduction.

Question 5

A 30-year-old female sustains a knee dislocation during a skiing accident. She is brought to the emergency department where the knee is successfully reduced. Initial neurovascular assessment reveals palpable distal pulses and an ABI of 1.0. Neurologi

Accepted Answer

Magnetic Resonance Imaging (MRI) of the knee.

Question 6

During a multi-ligament knee reconstruction for a chronic posterior knee dislocation, the surgeon is performing a PCL reconstruction using an allograft. To ensure proper graft tensioning and prevent posterior sag, at what knee position and with what

Accepted Answer

90 degrees of flexion with an anterior drawer applied.

Question 7

A 25-year-old male undergoes multi-ligament knee reconstruction following a high-energy knee dislocation. Post-operatively, he develops a foot drop and numbness in the first web space of his foot. Clinical examination confirms a common peroneal nerve

Accepted Answer

Application of an ankle-foot orthosis (AFO) and observation.

Question 8

A 38-year-old recreational athlete is undergoing rehabilitation after a multi-ligament knee reconstruction, including a PCL reconstruction. During the initial maximum protection phase (weeks 0-6), which of the following exercises or activities should

Accepted Answer

Gentle hamstring sets with active knee flexion beyond 45 degrees.

Question 9

A 29-year-old male is undergoing arthroscopic-assisted ACL reconstruction following a knee dislocation. The surgeon is preparing to pass the graft through the femoral and tibial tunnels. The image below depicts a common technique for graft fixation d

Accepted Answer

To resist anterior translation of the tibia relative to the femur.

Question 10

A 33-year-old active duty military personnel sustains a multi-ligamentous knee injury (ACL, PCL, and MCL tears) during a training exercise. After successful reduction and confirmation of vascular integrity, the orthopedic surgeon discusses the timing

Accepted Answer

Acute reconstruction (within 1-3 weeks) after resolution of swelling and inflammation.

ABOS Part I Orthopaedic Deformity Correction, Limb Reconstruction & Gait Analysis Review | Part 21914

ABOS Part I Comprehensive Orthopaedic Review: Knee, Hip & Femur Trauma, Acetabular Reconstruction | Part 21543

Key Takeaway