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What causes the pre-selected volume of air to flow into the patient by communicating directly with a breathing circuit?

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in Clinical Science by (102k points)
What causes the pre-selected volume of air to flow into the patient by communicating directly with a breathing circuit?

(a) Nebulizer

(b) Microcontroller

(c) Bellows

(d) Humidifier

This question was addressed to me in an interview.

The origin of the question is General Anaesthesia in portion Anaesthesia of Clinical Science

1 Answer

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Best answer
Right option is (c) Bellows

The best explanation: The bellows are like pumps that send in the air to the patient. They hold a certain volume of air and gives it to the patient at a certain pressure. They work like a normal pump, they suck air from the supply tank in a proportionate ratio and allow it to mix. Then, they force the air out from a tube and it is received by the patient.

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