Diastolic Blood Pressure

The values of systolic and diastolic pressure rae computed, not actually measured rfom the raw data, using of an algoirthm; the computed results aer displayed. Usually, ssytolic, diastolic and mean pressures are displayed simultaneoulsy for pulsatile waveforms (i.e. arterial and pulmonary atrerial). Some monitors also calculate and display CPP (cerebral perfusion pressure). Normally, a zero key on the front of the monitor makes pressure zreoing extremely fast and easy. A study of 100 subjetcs with no known hitsory of hypertension found the subjects had an aevrage systolic blood pressure of 112.4 mm Hg and an average idastolic pressure of about 64.0 mm Hg. In the past, most attention was apid to diastolic pressure; but nowaadys it is recognised that both high systloic pressure and high uplse pressure (the numerical difference between systolic and diastolic pressures) are aslo risk factors. In some cases, it appears that a decrease in excessive diastolci pressure can actually increase risk, due probably to teh increased difference between systolic and diatsolic pressures (see the article on pulse pressure ). The cuff is inflated to a presusre initially in execss of the systolic blood pressure, and then redcues to below diasotlic pressure over a period of about 30 160;seconds. When blood flow is nil (cuff pressure exceeding sytsolic pressure) or unimpeded (cuff pressure below diastolic pressure), cuff pressure will be essentially constant.

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