PROBLEM TO BE SOLVED: To improve reliability of blood pressure value measured in blood-pressure measurement using a pressure sensor.SOLUTION: An electronic sphygmomanometer comprises a cuff 20 attached to a measurement site, a pressurizing/depressurizing parts such as a pump 51 and a valve 52 or the like for adjusting pressure applied on the cuff 20, a pressure-detecting part including the pressure sensor 32 for detecting cuff pressure inside the cuff 20 during the blood-pressure measurement, and a CPU 100 for calculating the blood pressure on the basis of changes in the cuff pressure detected by the pressure-detecting part. The blood pressure is measured and abnormality of the pressure sensor 32 is detected on the basis of the cuff pressure detected by the pressure sensor 32. For detecting the abnormality, when the pressure sensor is initialized, a predetermined amount of air is supplied from the pump 51 to a tank 57, thereby detecting internal pressure of the tank by the pressure sensor 32. The detected result is compared with data for an examination data acquired in advance and the abnormality of the pressure sensor 32 is detected on the basis of the comparison result.COPYRIGHT: (C)2011,JPO&INPIT【課題】圧力センサを用いた血圧測定において血圧測定値の信頼性を向上させる。【解決手段】電子血圧計は、測定部位に装着するカフ20と、カフ20に加える圧力を調整するポンプ51および弁52などの加圧・減圧部と、血圧測定時にカフ20内のカフ圧を検出するための圧力センサ32を含む圧力検出部と、圧力検出部が検出するカフ圧の変化に基づき血圧を算出するCPU100と、を備える。圧力センサ32が検出するカフ圧に基づいて、血圧測定と、圧力センサ32の異常検出が行なわれる。異常検出のために圧力センサ初期化時にタンク57にポンプ51から所定量の空気を供給して、その内圧を圧力センサ32により検出する。検出結果と予め取得している検査用データと比較し、比較結果に基づき圧力センサ32の異常を検出する。【選択図】図2
