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Valsalva experience

Valsalva experience (And. M. Valsalva, the Italian anatomist and the surgeon, 1666-1723) – a way of studying of passability of acoustical pipes by creation in upper respiratory tracts of supertension of air for what investigated it is required, having closed a mouth and a nose, to make a strong exhalation; Valsalva experience proceeds with increase in intrathoracic pressure that leads to reduction of inflow of blood to heart and an urezheniye of pulse.

 
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Stomatologists appeared relatively recently. In the 19th century to pull out painful teeth belonged to duties of the ordinary hairdresser.