PROBLEM TO BE SOLVED: To appropriately control a pressure of a cuff fitted to a part to be measured in non-invasive measurement of a blood pressure per heartbeat according to a volume compensation method.SOLUTION: An electronic sphygmomanometer comprises a pressure adjustment part that has a plurality of pumps and is for adjusting a cuff pressure. An arterial volume detection part is provided to detect an arterial volume in a part to be measured and output it as an arterial volume signal. The cuff pressure is varied by operating the pressure adjustment part in a first capacity with the use of first-numbered pumps so that a direct current component of the arterial volume signal obtained at the maximum amplitude of a varied component of the arterial volume signal using a pulse wave is determined as a control target value for the arterial volume (S4). Then, a feedback control is made to control the cuff pressure by the pressure adjustment part so that the arterial volume signal matches the control target value (S8 to S11). In the cuff pressure control stage, the pressure adjustment part is operated in a second capacity that is higher than the first capacity by using second-numbered pumps in excess of the first-numbered pumps (S5 to S6).COPYRIGHT: (C)2014,JPO&INPIT【課題】容積補償法により非観血的に1心拍ごとの血圧測定を行う場合に、被測定部位に装着されるカフの圧力を適切に制御すること。【解決手段】 複数台のポンプを有し、カフ圧を調節するための圧力調節部を備える。被測定部位の動脈の容積を検出して動脈容積信号として出力する動脈容積検出部を備える。第1の台数のポンプを用いて第1の能力で圧力調節部を動作させることによりカフ圧を変化させて、動脈容積信号の脈波による変化成分の振幅が最大になった時点の動脈容積信号の直流成分を、動脈容積についての制御目標値として決定する(S4)。その後、フィードバック制御を行って、動脈容積信号が制御目標値と一致するように、圧力調節部によってカフ圧を制御する(S8~S11)。このカフ圧を制御する段階で、第1の台数よりも多い第2の台数のポンプを用いて第1の能力よりも高い第2の能力で圧力調節部を動作させる(S5~S6)。【選択図】図2
