Ear and audiology: glycerol test in Meniere disease: practice question

A ENT 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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ENT · Ear and audiology: glycerol test in Meniere disease

Sample item

In suspected early Meniere disease, which finding after oral glycerol dehydration supports hydrops?

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

The answer and the reasoning

B. Improvement of the pure tone threshold by at least 10 dB in the affected ear

The glycerol test (Klockhoff) dehydrates the endolymph through osmotic action. In hydrops a temporary improvement in the threshold, typically 10 dB or more, or in speech discrimination, is considered positive. The test is not used much now because of side effects and low sensitivity.

Option by option

  • A. No change in thresholds and speech discrimination

    No change is a negative result.

  • B. Improvement of the pure tone threshold by at least 10 dB in the affected ear (correct)

    Correct. Temporary threshold improvement follows reduction of endolymphatic pressure.

  • C. Appearance of nystagmus towards the normal ear

    Nystagmus is not a response measured in this test.

  • D. A 20 dB fall in hearing

    A fall in hearing is not the response to dehydration.

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 ENT question

What is the answer to this ENT question?

The best answer is B, Improvement of the pure tone threshold by at least 10 dB in the affected ear. The glycerol test (Klockhoff) dehydrates the endolymph through osmotic action.

Why is "No change in thresholds and speech discrimination" not the answer?

No change is a negative result.

Why is "Appearance of nystagmus towards the normal ear" not the answer?

Nystagmus is not a response measured in this test.

Why is "A 20 dB fall in hearing" not the answer?

A fall in hearing is not the response to dehydration.

What concept does this question test?

It tests Ear and audiology: glycerol test in Meniere disease in ENT. In hydrops a temporary improvement in the threshold, typically 10 dB or more, or in speech discrimination, is considered positive. The test is not used much now because of side effects and low sensitivity.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. 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 Ear and audiology: glycerol test in Meniere disease?

Learn tuning fork results and audiogram patterns by sketching them. Then use the flashcards and the other ENT 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.