2. Trauma MCQs

What is the primary clinical advantage of utilizing a "Lengthening Over a Nail" (LON) technique compared to classic Ilizarov external fixation alone for femoral lengthening?

When performing a high tibial osteotomy (HTO) for a varus knee with isolated medial compartment osteoarthritis, what is the generally accepted target point for the mechanical axis on the tibial plateau to ensure appropriate off-loading?

During preoperative planning for a distal femoral osteotomy in a patient with genu valgum, the mechanical lateral distal femoral angle (mLDFA) is measured. What is the normal value for this angle?

When correcting a valgus deformity of the distal femur using a closing wedge osteotomy, where should the hinge (axis of correction) be optimally placed to adhere to Osteotomy Rule 1?

On a full-length standing AP radiograph of the lower extremities, the mechanical axis deviation (MAD) is measured. How is the mechanical axis of the lower extremity defined?

Following a metaphyseal corticotomy for limb lengthening, a latency period is required before initiating distraction. What is the primary purpose of this latency period?

A 45-year-old male presents with genu valgum. Standing radiographs show a mechanical lateral distal femoral angle (mLDFA) of 81 degrees (normal 85-90) and a medial proximal tibial angle (MPTA) of 87 degrees (normal 85-90). The joint line convergence angle is 1 degree. Where is the primary source of the deformity?

During preoperative planning for a medial opening-wedge high tibial osteotomy (HTO) to treat medial compartment osteoarthritis, the surgeon targets the Fujisawa point. Where is this point anatomically located?

A 32-year-old construction worker presents to the emergency department approximately 45 minutes after sustaining a high-energy crush injury to his right hand. Clinical examination reveals significant swelling, ecchymosis, and deformity, particularly over the dorsum. Two small, punctate lacerations, each less than 1 cm, are noted over the dorsum of the hand, one proximal to the 4th metacarpal head and another over the mid-shaft of the 5th metacarpal. X-rays confirm multiple displaced metacarpal fractures. Based on the initial presentation, what is the most appropriate immediate management step for the open injury component?

During the initial clinical examination of the patient's right hand, it was noted that the 5th digit appeared to be scissoring over the 4th digit in gentle flexion. This specific finding is of critical importance in the management of metacarpal fractures because:

The surgical intervention involved open reduction and internal fixation of the 2nd, 4th, and 5th metacarpal fractures using 1.5 mm low-profile locking plates. The 4th metacarpal fracture was described as a short oblique, comminuted shaft fracture. Which of the following statements accurately describes the fixation strategy employed for this specific fracture pattern?

Despite successful surgical intervention and stable fixation, a critical pitfall in the management of multiple metacarpal fractures, particularly those involving the 5th metacarpal, is inadequate correction of rotational deformity. If this complication were to occur and go uncorrected, what would be the MOST likely functional consequence for the patient?

Which of the following internal fixation constructs provides the greatest biomechanical rigidity and highest load to failure for a transverse midshaft fracture of the third metacarpal?

A 35-year-old industrial painter accidentally injects his non-dominant index finger with a high-pressure paint gun. He presents to the ED 2 hours later with a small puncture wound and moderate digit swelling but minimal pain. What is the most appropriate management, and what is the primary determinant of the amputation risk?

A patient undergoes open reduction and internal fixation of multiple transverse metacarpal shaft fractures using low-profile dorsal plates. Which of the following is the most common complication associated with this specific fixation construct?

A 40-year-old diabetic patient presents with acute, rapidly progressive, severe pain and swelling of the hand and forearm following a minor scratch. The overlying skin shows bullae and ecchymosis. During emergent surgical exploration, you note 'dishwater' purulence, lack of bleeding from the fascia, and easily separable tissue planes. What is the most important component of definitive management for this condition?

A 6-year-old child presents with a lateral condyle fracture. Radiographs confirm a fracture with 3 mm of displacement and an intact articular hinge. According to the Jakob classification, this fracture would be categorized as Stage 2. Based on the case information, what is the most appropriate initial management strategy?

A 10-year-old patient presents with a lateral condyle fracture that was initially missed and now presents 6 months later with an established nonunion and progressive cubitus valgus deformity. The patient is experiencing symptoms of tardy ulnar nerve palsy. Based on the case information, what is the most appropriate management strategy?

A 7-year-old male presents with a lateral condyle fracture. The initial AP and lateral radiographs are ambiguous regarding the degree of displacement. An internal oblique view is obtained, which shows a fracture gap of 2.5 mm at the posterior aspect of the lateral metaphysis. Based on the current literature and guidelines, what is the most appropriate next step in management?

A 35-year-old man presents with a pathologic fracture of the proximal phalanx of the middle finger after minimal trauma. Radiographs show a well-circumscribed, central lytic lesion with stippled calcifications. The fracture is allowed to heal non-operatively over 6 weeks. What is the definitive management of the underlying lesion?