Pulse oximetry: 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 · Pulse oximetry

Sample item

Pulse oximetry estimates what?

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

The answer and the reasoning

A. Oxygen saturation

This item reviews Pulse oximetry; Oxygen saturation is the best answer because it directly fits the psychiatric or anesthetic pattern described.

Option by option

  • A. Oxygen saturation (correct)

    Correct. Oxygen saturation matches the defining feature.

  • B. PaCO2

    PaCO2 does not fit the stated presentation.

  • C. Cardiac output

    Cardiac output is unsupported by the key finding.

  • D. Hemoglobin level

    Hemoglobin level is plausible but is not the best answer.

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 A, Oxygen saturation. This item reviews Pulse oximetry; Oxygen saturation is the best answer because it directly fits the psychiatric or anesthetic pattern described.

Why is "PaCO2" not the answer?

PaCO2 does not fit the stated presentation.

Why is "Cardiac output" not the answer?

Cardiac output is unsupported by the key finding.

Why is "Hemoglobin level" not the answer?

Hemoglobin level is plausible but is not the best answer.

What concept does this question test?

It tests Pulse oximetry in Anaesthesia. The correct option holds because: Correct. Oxygen saturation matches the defining feature.

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 Pulse oximetry?

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.