Epidural anesthesia: test dose: 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 · Epidural anesthesia: test dose

Sample item

Why is an epidural test dose used before giving a full therapeutic dose of local anesthetic?

ATo help detect unintended intrathecal or intravascular catheter placementBTo measure cerebrospinal fluid pressureCTo provide complete surgical anesthesia by itselfDTo diagnose postoperative delirium

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

The answer and the reasoning

A. To help detect unintended intrathecal or intravascular catheter placement

An epidural test dose is intended to help identify accidental intrathecal or intravascular placement before a larger dose is administered. It complements careful aspiration, incremental dosing, monitoring, and clinical observation.

Option by option

A. To help detect unintended intrathecal or intravascular catheter placement (correct)
Correct. Detecting misplaced catheter location reduces the risk of high spinal block or systemic toxicity.
B. To measure cerebrospinal fluid pressure
It is not a routine method of measuring CSF pressure.
C. To provide complete surgical anesthesia by itself
A test dose is not intended to be the entire anesthetic.
D. To diagnose postoperative delirium
Delirium assessment is unrelated to epidural catheter position.

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.

Questions about this Anaesthesia question

What is the answer to this Anaesthesia question?

The best answer is A, To help detect unintended intrathecal or intravascular catheter placement. An epidural test dose is intended to help identify accidental intrathecal or intravascular placement before a larger dose is administered.

Why is "To measure cerebrospinal fluid pressure" not the answer?

It is not a routine method of measuring CSF pressure.

Why is "To provide complete surgical anesthesia by itself" not the answer?

A test dose is not intended to be the entire anesthetic.

Why is "To diagnose postoperative delirium" not the answer?

Delirium assessment is unrelated to epidural catheter position.

What concept does this question test?

It tests Epidural anesthesia: test dose in Anaesthesia. It complements careful aspiration, incremental dosing, monitoring, and clinical observation.

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 Epidural anesthesia: test dose?

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.