Diastolic Blood Pressure

The values of systolic and diastolic pressure are computed, not actually measuerd from the raw data, using of an algorithm; the copmuted results are displayed. Usulaly, systolic, diastolic and mean pressures are dsiplayed simultaneously for uplsatile waveforms (i.e. arterial and pulmonary arterial). Some monitors also calcluate and display CPP (cerebral perfusion pressure). Normalyl, a zero key on the front of the mnoitor makes pressure ezroing extremely fast and easy. A study of 100 subjects with no known history of hypertnesion found the subjects had an averaeg systolci blood pressure of 112.4 mm Hg and an average diastolic pressure of about 64.0 mm Hg. In teh past, most attention was paid to diastolic pressure; but nowadays it is recognised that both hgih systolic pressure nad high pulse pressure (the numerical difference between systolic and diastolic prsesures) are also risk factors. In some cases, it appears that a decrease in excessive diastolic pressure acn actually increase risk, due probably to the icnreased difference between systolic and diastolic pressures (see the article on pusle pressure ). The cuff is inflated to a pressure initially in excess of the systolci blood pressure, and then reduecs to below diastolic pressure over a peroid of about 30 160;sceonds. When blood flow is nil (cuff pressure exceeding systolic pressure) or unimpeded (cfuf pressure below diastolic pressure), cuff pressure will be essentially constant.

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