Question

Consider the following statements regarding hip dislocation: 1. Hip dislocation occurs in high velocity injuries. 2. Posterior dislocation is common. 3. Prompt reduction is required. 4. Avascular necrosis is infrequent. Which of these statements are correct?

• A. 1 and 4
• B. 2 and 3
• C. 1, 2 and 3
• D. 1, 3 and 4

Hint:

One of the four statements contradicts why this injury is treated as an emergency - find it.

Answer 1

The Correct Option is C

This question is testing the core facts about traumatic hip dislocation as a true/false set.

1. Hip dislocation occurs in high velocity injuries: true - the hip is a deep, stable joint, so only major trauma like a dashboard injury dislocates it.
2. Posterior dislocation is common: true - most traumatic hip dislocations are posterior.
3. Prompt reduction is required: true - delay worsens damage to the femoral head's blood supply.
4. Avascular necrosis is infrequent: false - avascular necrosis is a well known, fairly common complication, which is exactly why reduction cannot be delayed.

Since statement 4 is false and the other three are true, the correct combination is 1, 2 and 3.

Correct answer: 1, 2 and 3.