PROBLEM TO BE SOLVED: To provide a blood treatment device capable of sufficiently securing a blood flow path and shortening a filtration time even when a blood outflow chamber is in negative pressure in filtering blood.SOLUTION: A blood inflow port 7I is disposed on a base end side of first/second housings formed of flexible sheets, and a blood outflow port 7O is disposed on a terminal side of the first/second housings. A blood treatment member 5 formed by stacking a plurality of nonwoven fabrics with a predetermined thickness is disposed in the first/second housings. A blood inflow chamber 2IR is formed between the inner periphery of the first housing and an inside filtration part 5FI of the blood treatment member 5, and a blood outflow chamber 2OR is formed between the inner periphery of the second housing and an outside filtration part 5FO of the blood treatment member 5. Roughly tubular spacers T are disposed between the inner wall of the second housing in the blood outflow chamber 2OR and the outside filtration part 5FO. The base end part and the terminal part of the spacers T are fixed to the second housing, and the spacers T are disposed in one direction of the side part and in one direction of the other side part respectively so that they are substantially symmetrical with respect to a roughly center line CL.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】血液を濾過する際に血液流出室内が陰圧になっても血液流路を十分に確保することができ、濾過時間を短縮することができる血液処理器を提供すること。【解決手段】可撓性シートにより形成した第1/第2ハウジングの基端側に血液流入口7Iを配置し、第1/第2ハウジング末端側に血液流出口7Oを配置した。第1/第2ハウジング内に所定の厚みを有する不織布を複数枚重ねて形成した血液処理部材5を配置した。第1ハウジングの内周と血液処理部材5の内側濾過部5FIとの間に血液流入室2IRを形成し、第2ハウジングの内周と血液処理部材5の外側濾過部5FOとの間に血液流出室2ORを形成した。血液流出室2OR内の第2ハウジングの内壁と外側濾過部5FOとの間に略管状のスペーサTを配置した。スペーサTは、基端部と末端部を第2ハウジングに固定し、スペーサTは略中心線CLに対して実質的に対称となるように、側部の一方向と他の側部の一方向にそれぞれ配置した。【選択図】図2
