Extremities Limited Scope Practice Exam

What is the leg position after a posterior hip dislocation?

Flexion, adduction, internal rotation Flexion, abduction, external rotation Extension, adduction, internal rotation Extension, abduction, external rotation

Correct Answer:

Flexion, adduction, internal rotation

Explanation:

Posterior hip dislocations cause the leg to be flexed at the hip, adducted toward the midline, and internally rotated. This happens because the femoral head is displaced backward out of the acetabulum, often after a force to the knee or dashboard-type injury, pulling the leg into that flexed, cross-legged position. The limb is usually shortened as well, reflecting the displacement of the hip joint. This pattern differs from anterior dislocations, where the leg tends to be extended (or flexed), abducted, and externally rotated. So the description of flexion, adduction, and internal rotation best matches the post-dislocation position.

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