PROBLEM TO BE SOLVED: To provide a blood pressure measurement apparatus which can prevent the lowering of blood pressure measurement accuracy due to minute variations of the blood pressure without increasing the accuracy of cuff internal pressure measurement.SOLUTION: A blood pressure measurement apparatus detects a pulse wave from a cuff pressure signal detected while a pressing pressure applied by the cuff to a blood pressure measuring region is decreased, and acquires a blood flow sound signal corresponding to a blood flow sound that occurs during the decreasing period of the pressing pressure. Then the blood pressure measurement apparatus generates pulse wave envelope data in which the amplitude value of the detected pulse wave and the pressing pressure at the occurrence of the pulse wave are associated, and blood flow sound envelope data in which the amplitude value of the blood flow sound signal and the pressing pressure at the occurrence of the blood flow sound signal are associated. The blood pressure measurement apparatus then determines whether or not a periodic variation of the blood pressure is present during the decreasing of the pressing pressure, on the basis of the pulse wave envelope data and the blood flow sound envelope data.COPYRIGHT: (C)2014,JPO&INPIT【課題】カフ内圧の測定精度を高くすることなく、血圧の微小変動による血圧測定精度の低下を防ぐことが可能な血圧測定装置を提供する。【解決手段】CPUは、カフによる測定部位の減圧期間中に検出されるカフの圧力信号から脈波を検出し、減圧期間中に発生する血流音に応じた血流音信号を取得する。そして、検出した脈波の振幅値と当該脈波の発生時点での圧迫圧力とを対応付けた脈波包絡線のデータと、血流音信号の振幅値と当該血流音信号の発生時点での圧迫圧力とを対応付けた血流音包絡線のデータを生成し、脈波包絡線のデータと血流音包絡線のデータとを用いて、減圧期間中における血圧の周期的な変動の有無を判定する。【選択図】図17
