Monitoring: 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 · Monitoring

Sample item

What does pulse oximetry estimate?

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

The answer and the reasoning

C. Arterial oxygen saturation

Pulse oximetry estimates arterial oxygen saturation using light absorption, but it can lag behind ventilation problems and is affected by poor perfusion or dyshemoglobins.

Option by option

  • A. Cardiac output exactly

    It cannot give exact cardiac output.

  • B. Blood glucose

    Glucose requires a blood or sensor measurement.

  • C. Arterial oxygen saturation (correct)

    Correct: oximetry estimates oxygen saturation.

  • D. End-tidal anesthetic concentration

    End-tidal agent concentration requires an anesthetic gas monitor.

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.

More Anaesthesia questions

Questions about this Anaesthesia question

What is the answer to this Anaesthesia question?

The best answer is C, Arterial oxygen saturation. Pulse oximetry estimates arterial oxygen saturation using light absorption, but it can lag behind ventilation problems and is affected by poor perfusion or dyshemoglobins.

Why is "Cardiac output exactly" not the answer?

It cannot give exact cardiac output.

Why is "Blood glucose" not the answer?

Glucose requires a blood or sensor measurement.

Why is "End-tidal anesthetic concentration" not the answer?

End-tidal agent concentration requires an anesthetic gas monitor.

What concept does this question test?

It tests Monitoring in Anaesthesia. The correct option holds because: Correct: oximetry estimates oxygen saturation.

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 Monitoring?

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.