Larynx and airway: speaking valve and cuff: 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 · Larynx and airway: speaking valve and cuff

Sample item

A one-way speaking valve is placed on the tracheostomy tube of a ventilator-weaned patient. Which condition must be met before it is used?

AThe cuff must be fully deflatedBThe cuff must be fully inflatedCThe tube must be fenestrated and cuffed with inflationDThe inner tube must be removed and capped

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

The answer and the reasoning

A. The cuff must be fully deflated

A speaking valve lets air in through the tube but not out, so exhaled air has to pass around the tube and through the larynx. If the cuff is inflated the patient cannot exhale and can suffocate. Cuff deflation is therefore essential.

Option by option

A. The cuff must be fully deflated (correct)
Correct. Exhalation must pass around the tube, which requires a deflated cuff.
B. The cuff must be fully inflated
An inflated cuff blocks the airway and, with a valve in place, prevents any exhalation.
C. The tube must be fenestrated and cuffed with inflation
Inflating a cuff on a fenestrated tube with a valve would block exhalation.
D. The inner tube must be removed and capped
Capping the tube without a valve is a separate test and does not meet this condition.

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 ENT question

What is the answer to this ENT question?

The best answer is A, The cuff must be fully deflated. A speaking valve lets air in through the tube but not out, so exhaled air has to pass around the tube and through the larynx.

Why is "The cuff must be fully inflated" not the answer?

An inflated cuff blocks the airway and, with a valve in place, prevents any exhalation.

Why is "The tube must be fenestrated and cuffed with inflation" not the answer?

Inflating a cuff on a fenestrated tube with a valve would block exhalation.

Why is "The inner tube must be removed and capped" not the answer?

Capping the tube without a valve is a separate test and does not meet this condition.

What concept does this question test?

It tests Larynx and airway: speaking valve and cuff in ENT. If the cuff is inflated the patient cannot exhale and can suffocate. Cuff deflation is therefore essential.

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 Larynx and airway: speaking valve and cuff?

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.