| 摘要 |
PROBLEM TO BE SOLVED: To improve blood pressure measurement accuracy by performing the suppression of the occurrence of noise, the reduction of the influence of pulsation, and high-accuracy pressurization control when performing the pressurization control by use of a piezoelectric pump in a pressurization process for blood pressure measurement.SOLUTION: In this blood pressure measurement device, the control amplitude and the control frequency of a voltage applied to the piezoelectric pump are determined (steps S111-S114). Control is performed such that the voltage having the determined control amplitude and control frequency is applied to the piezoelectric pump (steps S121, S122), and a blood pressure value is calculated based on a cuff pressure detected by a pressure detection part in the pressurization process of pressurizing the cuff pressure by the piezoelectric pump (step S123). The amplitude of the voltage can be controlled in a prescribed stage, the voltages having the amplitude of a value in at least one stage above the control amplitude and the amplitude of a value in at least one stage below it are applied in prescribed order such that the piezoelectric pump becomes nearly equivalent to when the voltage having the determined control amplitude is applied (steps S111, S112, S121, S122). |
