Valsalva maneuverVal·salva maneuver
any forced expiratory effort against a closed or blocked air passage, as blowing hard with nose and mouth closed during an ascent or descent in an aircraft to equalize pressure in the ears
Origin of Valsalva maneuverafter Antonio Valsalva (1666-1723), Italian anatomist
- Expiratory effort when the mouth is closed and the nostrils are pinched shut, which forces air into the eustachian tubes and increases pressure on the inside of the eardrum.
- Expiratory effort against a closed glottis, which increases pressure within the thoracic cavity, causing decreased venous return of blood to the heart and a transient drop in blood pressure.
Origin of Valsalva maneuverAfter Antonio Maria Valsalva, (1666–1723), Italian anatomist.