PROBLEM TO BE SOLVED: To provide a blood pressure measuring instrument capable of correctly measuring systolic blood pressure with an oscillometric system (a double cuff system), and to provide a blood pressure measuring method.SOLUTION: The blood pressure measuring instrument includes: a cuff body (1) having a cuff member (2), an ischemic air bag (8) for pressurizing a whole blood pressure measurement part, a sub-air bag (7) for pressurizing the heart side of the blood pressure measurement part, a pulse wave detection air bag (5) for pressurizing the blood vessel downstream side of the blood pressure measurement part and detecting a pulse wave at the downstream side a pressurizing/depressurizing means (23) connected via tubes (11, 12, 13) for pressurizing/depressurizing the cuff body, a damper device (18), and an opening/closing valve (16) cuff pressure detecting means (31, 32, 33) for obtaining a cuff pressure signal, based on the pressure change of the pulse wave detection air bag and a pulse wave detecting means (35) for obtaining a pulse wave signal by detecting the pulse wave to be superimposed on the cuff pressure signal.COPYRIGHT: (C)2009,JPO&INPIT【課題】 オシロメトリック方式(ダブルカフ方式)において収縮期血圧測定を正確に行える血圧測定装置及び血圧測定方法の提供。【解決手段】カフ部材(2)と、血圧測定部位全体を圧迫する阻血用空気袋(8)と、血圧測定部位の心臓側を圧迫するサブ空気袋(7)と、血圧測定部位の血管下流側を圧迫し、かつ下流側の脈波を検出する脈波検出用空気袋(5)とからなるカフ本体(1)と、前記カフ本体を加圧及び減圧するための配管(11、12、13)、ダンパー装置(18)及び開閉弁(16)を介して接続される加減圧手段(23)と、前記脈波検出用空気袋の圧力変化からカフ圧信号を得るカフ圧力検出手段(31、32、33)と、前記カフ圧信号に重畳する脈波を検出して脈波信号を得る脈波検出手段(35)とを備える。【選択図】図1
