valsalva manoeuvre


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valsalva manoeuvre

The effort to breathe out forcibly while the mouth and nose are firmly closed or the vocal cords pressed together. The valsalva manoeuvre is employed while straining at stool and in other circumstances. It causes a rise in blood pressure followed by a sharp drop and then a second sharp rise in blood pressure. This may be dangerous in people with heart disease and should be avoided. (Antonio Maria Valsalva, 1666–1723, Italian anatomist).
References in periodicals archive ?
After attempting further Valsalva manoeuvres and drinking iced water, I decided it was time to seek help.
Mass may enlarge with Valsalva manoeuvre and on erect position.
2] The injection of 1 mL of air followed by 3 mL of 3% ethoxysclerol (air-block technique) during the Valsalva manoeuvre caused an increase in intravascular pressure due to the presence of air and to the Valsalva manoeuvre.
The participants were then asked to perform the Valsalva manoeuvre by exhaling forcefully into a mercury manometer and maintaining the pressure at 40 mm Hg and the Valsalva Ratio was calculated by dividing the longest R-R interval after the manoeuvre by the shortest R-R interval during the manoeuvre.
Non-obstetric SPM is a benign entity that should be diagnosed when the history suggests a prolonged Valsalva manoeuvre, with cervical or thoracic subcutaneous emphysema.
When you're on land, just a yawn can do the trick, but when you're underwater and with a breathing device in your mouth, the Valsalva manoeuvre is your only defence against an exploding blood vessel and much worse.
Verghese et al (4) investigated effects of Trendelenburg position, Valsalva manoeuvre and liver compression on RIJV CSA in infants and children.
This is called the Valsalva manoeuvre and it works because air at cabin pressure is forced into the middle ear and sinuses.
Pulse volume, blood pressure and Valsalva manoeuvre may be useful but are not definitive.
Also there was no secretion from the growth, no transillumination, no expansion of growth with crying, valsalva manoeuvre or no compression of ipsilateral jugular vein.