PROBLEM TO BE SOLVED: To maintain an optimum control target value for increased blood pressure measurement accuracy in an extended continuous blood pressure measurement using a volume compensation method.SOLUTION: An electronic sphygmomanometer 1 comprises a first arterial volume detection part 24 that detects the volume of an artery in a blood pressure measuring region of a subject with the blood pressure measuring region pressed by a cuff 2, determines to be a control target value the first arterial volume detected when the blood pressure measuring region is pressed by a pressing pressure which gives a maximum amplitude of the change in the first arterial volume detected in the blood pressure measuring region, then adjusts the pressing pressure of the cuff 2 so that the first arterial volume is fixed at the control target value, and measures the blood pressure of the subject from the adjusted pressing pressure on the blood pressure measuring region. Then the electronic sphygmomanometer 1 comprises a second arterial volume detection part 25 that detects the volume of the artery in a region on the central side of the blood measuring region, along the blood flow in the artery for which the first arterial volume is detected, and redetermines the control target value on the basis of the second arterial volume detected in the region on the central side.COPYRIGHT: (C)2014,JPO&INPIT【課題】容積補償法を用いた長時間にわたる連続血圧測定において、最適な制御目標値を維持し、血圧測定精度を高める。【解決手段】電子血圧計1は、被測定者の血圧測定部位をカフ2により圧迫した状態で、血圧測定部位における動脈の容積を第1動脈容積検出部24によって検出し、血圧測定部位において検出される第1動脈容積の変化の最大振幅を与える圧迫圧力で血圧測定部位を圧迫したときの第1動脈容積を制御目標値に決定し、第1動脈容積を該制御目標値に一定化させるようにカフ2の圧迫圧力を調節して、その際の前記血圧測定部位の圧迫圧力から被測定者の血圧を測定する。そして、電子血圧計1は、第1動脈容積を検出する動脈の血流に沿って血圧測定部位よりも中枢側の部位における動脈の容積を第2動脈容積検出部25によって検出し、この中枢側の部位において検出される第2動脈容積に基づいて、制御目標値を再決定する。【選択図】図3
