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Orthopaedics · Pelvis: vertical shear injury
Sample itemA construction worker falls from a scaffold and lands on his right leg. The right leg appears shortened and the pelvic radiograph shows upward displacement of the right hemipelvis with sacroiliac disruption. Which Young-Burgess pattern is this?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Vertical shear
Vertical shear injuries result from axial loading, such as a fall onto an extended leg, and displace the hemipelvis proximally. All ligaments of the ring on that side are torn or the sacrum is fractured. The injury is completely unstable and needs surgical fixation.
Option by option
A. Anteroposterior compression I
APC I is a minor symphyseal widening with intact posterior ligaments.
B. Isolated pubic ramus fracture
An isolated ramus fracture would not cause upward displacement of the hemipelvis.
C. Lateral compression I
Lateral compression I is a stable impaction injury and does not cause vertical displacement.
D. Vertical shear (correct)
Correct. Vertical displacement of the hemipelvis after a fall onto the leg is vertical shear.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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