From Big Medical Encyclopedia

VALSALVA EXPERIENCE ( A. M. Valsalva , 1666 — 1723, the ital. anatomist and the surgeon) — a method of a research of passability of acoustical (eustachian) pipes. At V.'s carrying out of the lake investigated suggest to close densely nostrils (fingers of hands) and companies, ask to make quickly strong exhalation. As a result of it air pressure sharply increases in upper respiratory tracts; air on an acoustical pipe at its passability gets into a drum cavity. The build-up of pressure caused thus in a drum cavity sticks out a tympanic membrane towards acoustical pass. Noise of the air passing through an acoustical pipe during V. the lake can be heard, having connected acoustical pass of the researcher investigated with an ear a control drainage rubber tube to olives (such tube was called an otoscope earlier). At strong forcing of air and existence of perforation of a tympanic membrane of the person, surrounding the patient, even without tube hear as if whistle.

B. the island was applied sometimes and with the medical purpose as one of methods of blowing off of ears. As the lake can lead V. to unpleasant complications, it is applied seldom. Sharp increase in air pressure in upper respiratory tracts, especially at cardiovascular insufficiency, can cause a deep syncope. Increase in the vnutritimpanalny pressure which is not controlled at this experience can lead in rare instances to a rupture of a tympanic membrane, especially if on it there are thin hems. Valsalva's experience is applied also at a manometriya on Voyacheka (see. Manometriya ear ).

See also Acoustical pipe .

Ya. A. Shvartsberg.