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(medicine) A self-administered procedure comprising an attempted exhalation against a closed airway, usually performed by closing one's mouth and pinching one's nose shut while attempting, with moderate force, to expel air.
We observed forearm vasodilatation following the Valsalva manoeuvre in 11 out of 19 normal subjects; the remainder showed a persistent forearm vasoconstriction (Bennett et al. 1979b).
When that time comes, a person may perform the Valsalva manoeuvre, increasing the pressure inside the abdomen by exhaling against a closed airway as if popping one’s ears on a flight.
2019, David Chambers, Christopher Huang, Gareth Matthews, Basic Physiology for Anaesthetists, 2nd edition, Cambridge University Press, page 175:
The Valsalva manoeuvre is performed by forced expiration against a closed glottis. It is attributed to Antonio Valsalva (1666–1723), who described it as a test of Eustachian tube patency and as a method of expelling pus from the middle ear.
Translations
self-administered medical procedure of attempting to blow against a closed airway
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