| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure blood pressures during times of rising and falling blood pressure.SOLUTION: When determining a target control value for times of falling blood pressure, the average value of an arterial volume signal of one pulse beat when at a maximum of the amplitude of an arterial volume change signal that is an alternating current component of an arterial volume signal detected by a volume detection unit while pressurizing cuff pressure by a pressurization/depressurization unit is determined (step ST4) as the target control value for times of falling blood pressure. When the blood pressure is falling, the cuff pressure is adjusted (step ST6) so that the volume represented by the arterial volume signal detected by the volume detection unit matches the determined target control value, and the cuff pressure when predetermined conditions are met for the purpose of judging that the volume when the blood pressure is falling matches the target control value is extracted (step ST7, step ST8) as the blood pressure when the blood pressure is falling. The blood pressure at times of rising blood pressure is extracted in a similar manner (step ST10-step ST12) using a target control value for times of rising blood pressure, or in a manner of correcting the extracted blood pressure using the target control value for times of falling blood pressure. |
