|
Pulse pressure is the difference between the systolic and diastolic pressure readings. It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts. If resting blood pressure is (systolic/diastolic) 120/80 millimeters of mercury (mmHg), pulse pressure is 40.〔A review of educational strategies to improve nurses' roles in recognizing and responding to deteriorating patients. Liaw SY, Scherpbier A, Klainin-Yobas P, Rethans JJ.〕 ==Calculation== Formally it is the systolic pressure minus the diastolic pressure.〔http://highbloodpressure.about.com/od/highbloodpressure101/p/pulse_pressure.htm〕 Theoretically, the systemic pulse pressure can be conceptualized as being proportional to stroke volume, or the amount of blood ejected from the left ventricle during systole and inversely proportional to the compliance of the aorta.〔(Arterial pulse pressure )〕 The aorta has the highest compliance in the arterial system due in part to a relatively greater proportion of elastin fibers versus smooth muscle and collagen. This serves the important function of damping the pulsatile output of the left ventricle, thereby reducing the pulse pressure. If the aorta becomes rigid in conditions such as arteriosclerosis or atherosclerosis, the pulse pressure would be very high. * Systemic pulse pressure = Psystolic - Pdiastolic = 120mmHg - 80mmHg = 40mmHg * Pulmonary pulse pressure = Psystolic - Pdiastolic = 25mmHg - 10mmHg = 15mmHg 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「pulse pressure」の詳細全文を読む スポンサード リンク
|