PROBLEM TO BE SOLVED: To provide a blood circuit which does not inhibit blood flow.SOLUTION: The blood circuit comprises a pressure measurement portion 100 connected to a pressure measurement device. The pressure measurement portion 100 comprises a housing 110 and a flexible membrane disposed in the housing. Blood is flown in the housing 110 so as to be adjacent to the flexible membrane. The flexible membrane is displaced according to blood pressure to vary a gap between the flexible membrane and the housing 110, so that blood pressure can be measured. The blood circuit further comprises a bypass path 290 which is disposed being separate from the housing 110 and in parallel to the flexible membrane so that blood can flow when a channel in the housing 110 is blocked.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】血液の流れを阻害しない血液回路を提供することを目的とする。【解決手段】血液回路は、圧力測定装置と接続される圧力測定部100を有する。圧力測定部100はハウジング110と、ハウジング内に設けられた可撓性膜と、を備え、可撓性膜に隣接するようにハウジング110内に血液を流し、血液の圧力に応じて可撓性膜が変位してハウジング110との間の隙間を変化させることで血液の圧力を測定することができ、ハウジング110内の流路が閉塞したときに血液が流れるように可撓性膜と並列にハウジング110から離隔して設けられたバイパス路290をさらに備える。【選択図】図2
