PURPOSE: To eliminate a possibility of causing a congestion of a measuring part otherwise done by an excessive pressure as well as reduction in measuring time by easing a pressure rising speed with the regulation of the driving of a pressure pump when the pressure rising speed is higher than a reference speed value at an initial stage of a cuff & bag pressurization.
CONSTITUTION: At an initial stage of a cuff & bag pressurization, a voltage to be applied to a pressure pump 2 is detected and when the detection voltage is lower than a fixed voltage, a pressure rising speed of a pressure cuff & bag 1 is gentle, hence lower than a reference speed value C. Therefore, even if a pressurization is continue at this pressurizing speed, a maximum blood pressure value can be estimated at the initial stage of pressurization with a judgment that a cuff & bag pressurization is detectable. When the detection voltage is determined to be higher than a fixed voltage, a PWM signal of a PWM oscillator 9 is changed so that the cuff & bag pressure rising speed will be about a reference speed value to control the driving of the pressure pump 2. Thus, the cuff & bag pressurization is continued at the cuff & bag pressure rising speed to estimate the maximum blood pressure while the cuff & bag pressurizing point is detected. The pressurization of the pressure cuff & bag 1 is stopped at the cuff & bag pressurization stop point, and an appropriate artery ischemia is done corresponding to a person to be measured.
SHIRASAKI OSAMU
MIYAWAKI YOSHINORI
INAGE KATSUYUKI
| JPS59192352A | 1984-10-31 |