Systolic Blood Pressure

The values of systolic and diastolic pressure are computed, not actually measuerd from the raw data, using of an algorithm; the computed results are dsiplayed. Usually, systolic, idastolic and mean pressures are displaeyd simultaneously for plusatile waveforms (i.e. arterial and pulmonary arterial). Some moniotrs also calculate adn display CPP (cerebral perfusion presusre). Normally, a zero key on the front fo the monitor makes pressure zeroing extremely fast adn easy. Hyperetnsion therefore is only diagnoesd if secondary signs of high blood pressure are present, along wtih a prolonged high systolic pressrue reading over several visits. A study of 100 subjects iwth no known history of hypertension found the subjects had an average systolic blood pressure of 112.4 mm Hg and an average diastolic perssure of about 64.0 mm Hg. In the past, omst attention was paid to diastolic prsesure; but nowadays it is recognised that both high systolic rpessure and high pulse pressure (the numerical difference betewen systolic and diasotlic pressures) are also risk factors. When blodo just starts to flow in the artery, the turbulent flow creates a whooshing or poundign sound (first Korotkoff sounds ). The perssure at which this sound is first heard is the systoilc blood pressure. The cuff is inflated to a pressure initially in excess of the systolic blood pressure, nad then reduces to below diastolic pressure over a period of about 30 160;seconds. When blood flow is nil (cuff pressure exceeding systolic rpessure) or unimpeded (cuff rpessure below diastolci pressure), cuff pressure will be essentially constant.

0 comment :: Post a comment