Paediatric anaesthesia: penile block: practice question

A Anaesthesia 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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Anaesthesia · Paediatric anaesthesia: penile block

Sample item

A dorsal penile nerve block is used for circumcision in a child. Where is the local anaesthetic deposited?

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

The answer and the reasoning

C. In the subpubic space below the symphysis pubis

The dorsal nerves of the penis, branches of the pudendal nerve, pass through the subpubic space beneath Scarpa's fascia. Local anaesthetic injected here, or as a ring block at the base, gives analgesia for circumcision. Adrenaline is avoided because the penis has end-arterial blood supply.

Option by option

  • A. Into the corpus cavernosum

    Intracavernosal injection is dangerous and not used for analgesia.

  • B. Directly into the glans

    Injecting at the glans risks vascular injury and is not the standard approach.

  • C. In the subpubic space below the symphysis pubis (correct)

    Correct. The subpubic space contains the dorsal penile nerves.

  • D. Into the scrotal sac

    The scrotum is supplied by different nerves.

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 Anaesthesia question

What is the answer to this Anaesthesia question?

The best answer is C, In the subpubic space below the symphysis pubis. The dorsal nerves of the penis, branches of the pudendal nerve, pass through the subpubic space beneath Scarpa's fascia.

Why is "Into the corpus cavernosum" not the answer?

Intracavernosal injection is dangerous and not used for analgesia.

Why is "Directly into the glans" not the answer?

Injecting at the glans risks vascular injury and is not the standard approach.

Why is "Into the scrotal sac" not the answer?

The scrotum is supplied by different nerves.

What concept does this question test?

It tests Paediatric anaesthesia: penile block in Anaesthesia. Local anaesthetic injected here, or as a ring block at the base, gives analgesia for circumcision. Adrenaline is avoided because the penis has end-arterial blood supply.

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 Paediatric anaesthesia: penile block?

Make a table of each agent, its key advantage and its main side effect. Then use the flashcards and the other Anaesthesia 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.