If a patient's foot is rotated internally and shortened, what type of hip dislocation does this indicate?

• A. Anterior
• B. Posterior
• C. Central
• D. Subcapital

Answer: (B)

When a patient's foot is rotated internally and shortened, it is indicative of a posterior hip dislocation. In this type of dislocation, the hip joint has been displaced posteriorly, which often results in characteristic deformities. The internall rotation is a typical sign because the muscles that stabilize the hip, particularly the gluteal muscles, are unable to hold the femur in its correct position when dislocated, leading to the femoral head being positioned more internally.

Additionally, the shortening of the limb occurs as the dislocated femoral head is no longer aligned in the acetabulum correctly, causing a change in the overall alignment of the leg. These clinical signs are crucial for medical professionals to recognize quickly, as posterior hip dislocations can be associated with significant complications, including nerve injury and blood supply to the femoral head.

In contrast, anterior dislocations would typically present with external rotation, and central or subcapital dislocations are less commonly used terms in the context of dislocations related to the hip joint specifically and can refer to different mechanisms and presentations.