adjective General Slang

NPO

EN-PEE-OH · adjective · informal

Nothing by mouth; no food or drink allowed.

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Definitions

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An order that the patient must not eat or drink anything, commonly used before surgery or anesthesia to reduce the risk of aspiration.

“Keep him NPO after midnight; he's going to the OR in the morning.”
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NPO In A Sentence

Keep him NPO after midnight; he's going to the OR in the morning.

Origin & Usage

Abbreviation of Latin 'nil per os' meaning 'nothing through the mouth.'

Variants nil per osn.p.o.

People Also Ask

What does NPO mean?

It means nothing by mouth: the patient is not allowed to eat or drink anything, often ordered before surgery or a procedure.

Why are patients kept NPO?

An empty stomach lowers the risk of aspirating food or fluid into the lungs during anesthesia or sedation.

What does NPO stand for?

It comes from the Latin 'nil per os,' meaning nothing through the mouth.

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