Dislocations: hip reduction timing: practice question

A Orthopaedics question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Orthopaedics · Dislocations: hip reduction timing

Sample item

How soon should a traumatic posterior dislocation of the hip be reduced to reduce the risk of avascular necrosis?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. Within 6 hours

The risk of avascular necrosis rises sharply when a dislocated hip is reduced more than 6 hours after injury because the retinacular vessels remain kinked. Closed reduction by the Allis method under anaesthesia is performed urgently, followed by CT for fragments.

Option by option

  • A. Reduction timing does not affect outcome

    Timing is strongly associated with outcome.

  • B. Within 6 hours (correct)

    Correct. Reduction within 6 hours lowers avascular necrosis.

  • C. Within 7 days

    Seven days is far too late.

  • D. After 2 weeks of traction

    Delayed traction increases the risk.

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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Questions about this Orthopaedics question

What is the answer to this Orthopaedics question?

The best answer is B, Within 6 hours. The risk of avascular necrosis rises sharply when a dislocated hip is reduced more than 6 hours after injury because the retinacular vessels remain kinked.

Why is "Reduction timing does not affect outcome" not the answer?

Timing is strongly associated with outcome.

Why is "Within 7 days" not the answer?

Seven days is far too late.

Why is "After 2 weeks of traction" not the answer?

Delayed traction increases the risk.

What concept does this question test?

It tests Dislocations: hip reduction timing in Orthopaedics. Closed reduction by the Allis method under anaesthesia is performed urgently, followed by CT for fragments.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Dislocations: hip reduction timing?

Pair each fracture with its classic complication and nerve injured. Then use the flashcards and the other Orthopaedics questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.