Labour: pudendal nerve block: practice question

A OBG 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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OBG · Labour: pudendal nerve block

Sample item

The pudendal nerve is blocked at which landmark?

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

The answer and the reasoning

A. Near the ischial spine (Alcock's canal)

The pudendal nerve (S2-S4) is infiltrated transvaginally as it passes behind the sacrospinous ligament near the ischial spine. It provides perineal anaesthesia for episiotomy and instrumental delivery. Complications include haematoma and intravascular injection.

Option by option

  • A. Near the ischial spine (Alcock's canal) (correct)

    Correct. The ischial spine is the landmark.

  • B. Sacral promontory

    The sacral promontory is a pelvimetry landmark.

  • C. Iliac crest

    The iliac crest is not a landmark for this block.

  • D. Pubic symphysis

    The symphysis is not related.

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.

More OBG questions

Questions about this OBG question

What is the answer to this OBG question?

The best answer is A, Near the ischial spine (Alcock's canal). The pudendal nerve (S2-S4) is infiltrated transvaginally as it passes behind the sacrospinous ligament near the ischial spine.

Why is "Sacral promontory" not the answer?

The sacral promontory is a pelvimetry landmark.

Why is "Iliac crest" not the answer?

The iliac crest is not a landmark for this block.

Why is "Pubic symphysis" not the answer?

The symphysis is not related.

What concept does this question test?

It tests Labour: pudendal nerve block in OBG. It provides perineal anaesthesia for episiotomy and instrumental delivery. Complications include haematoma and intravascular injection.

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 Labour: pudendal nerve block?

Learn management algorithms as steps: PPH, eclampsia, ectopic pregnancy. Then use the flashcards and the other OBG 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.