Respiratory physiology and ventilation: curriculum recognition: 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 · Respiratory physiology and ventilation: curriculum recognition

Sample item

A spontaneously breathing intubated patient triggers every breath. The ventilator adds a fixed inspiratory boost and ends the breath when the flow falls to a fraction of its peak. Which mode is this?

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

The answer and the reasoning

D. Pressure support ventilation

Pressure support is patient-triggered and flow-cycled, so the patient controls the rate and the inspiratory time. It is widely used for weaning. The controlled modes cycle by time and deliver set breaths regardless of effort.

Option by option

  • A. Pressure-controlled ventilation

    Pressure-controlled breaths are time-cycled and do not depend on the patient's flow.

  • B. Volume-controlled ventilation

    Volume-controlled breaths deliver a fixed volume and are cycled by volume or time.

  • C. Synchronised intermittent mandatory ventilation

    Synchronised intermittent mandatory ventilation adds a set number of mandatory breaths.

  • D. Pressure support ventilation (correct)

    Correct. Patient-triggered, flow-cycled pressure assistance defines pressure support.

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 D, Pressure support ventilation. Pressure support is patient-triggered and flow-cycled, so the patient controls the rate and the inspiratory time.

Why is "Pressure-controlled ventilation" not the answer?

Pressure-controlled breaths are time-cycled and do not depend on the patient's flow.

Why is "Volume-controlled ventilation" not the answer?

Volume-controlled breaths deliver a fixed volume and are cycled by volume or time.

Why is "Synchronised intermittent mandatory ventilation" not the answer?

Synchronised intermittent mandatory ventilation adds a set number of mandatory breaths.

What concept does this question test?

It tests Respiratory physiology and ventilation: curriculum recognition in Anaesthesia. It is widely used for weaning. The controlled modes cycle by time and deliver set breaths regardless of effort.

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 Respiratory physiology and ventilation: curriculum recognition?

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.