PROBLEM TO BE SOLVED: To provide a sphygmomanometry apparatus for measuring blood pressure with a good S/N ratio of systolic blood pressure measurement while reducing phenomena that pulse waves on the upstream side of a cuff are detected by a pulse wave detection part via an ischemia air bag.SOLUTION: The sphygmomanometry apparatus is provided with: a first pipe connected between the ischemia air bag and a pressure elevating and reducing means via a first open/close valve 15-2 a second pipe connected between a sub-air bag and the pressure elevating and reducing means via a second open/close valve 15-1 and a third pipe connected between an air bag for detecting pulse waves and a cuff pressure detecting means via a third open/close valve. A bypass flow path comprising a first fluid body resistor 14 is provided between the first pipe connected to the ischemic air bag for and the third pipe connected to the air bag for pulse wave detection.COPYRIGHT: (C)2009,JPO&INPIT【課題】カフ上流側の脈波が阻血用空気袋を介して脈波検出部に検出される現象が軽減され、収縮期血圧測定のS/N比良く血圧測定を行える血圧測定装置の提供。【解決手段】阻血空気袋と加減圧手段の間で第1開閉バルブ15-2を介して接続される第1配管と、サブ空気袋と加減圧手段の間で第2開閉バルブ15-1を介して接続される第2配管と、脈波検出用空気袋とカフ圧カ検出手段とを第3開閉バルブ16を介して接続する第3配管を備え、阻血空気袋に接続される第1配管と脈波検出用空気袋に接続される前記第3配管との間は、第1流体抵抗14からなるバイバス流路を備える。【選択図】図1
