PROBLEM TO BE SOLVED: To provide a mixed injection member which prevents inconveniences such as formation of a blood clot inside and gives no damage to hemocyte ingredients of the blood.SOLUTION: The mixed injection member 15 includes an inflow passage 17 communicating with the upstream part of a blood circuit to take in the blood, an outflow passage 18 communicating with the downstream part of the blood circuit to flow out the blood, and a communicating chamber 21 communicating with the inflow passage 17 and the outflow passage 18. A piercing/drawing section 23 is arranged at a part of the inner wall 20 of the communicating chamber 21 for piercing and drawing out a piercing tube, and the communicating chamber 21 and the piercing tube communicate with each other via the piercing/drawing section 23. A central axis L1 of the inflow passage 17 is dislocated from an extension line of the central axis L2 of the outflow passage 18.COPYRIGHT: (C)2009,JPO&INPIT【課題】内部に血栓が形成される不都合を抑えることができ、しかも血液の血球成分を損傷させる虞がない混注部材を提供する。【解決手段】血液回路の上流部に連通して血液を流入可能な流入通路17と、血液回路の下流部に連通して血液を流出可能な流出通路18と、流入通路17と流出通路18とを連通する連通室21とを備え、該連通室21の内壁20の一部に穿刺管が穿脱可能な穿脱部23を設け、該穿脱部23を介して連通室21と穿刺管とを連通可能な混注部材15であって、流入通路17の中心軸L1を流出通路18の中心軸L2の延長線上から外れた位置に設定した。【選択図】図2
