PROBLEM TO BE SOLVED: To provide a blood processing filter and blood processing circuit capable of recovering a blood in pores of a filter medium of the blood processing filter and producing no blood loss in the blood processing.SOLUTION: A blood processing filter 55 comprises: a housing 58 including an inflow port 82, an outflow port 84, an inflow-side liquid chamber 86 communicating with the inflow port 82, and an outflow-side liquid chamber 88 for communicating with the outflow port 84 a filtering medium 56 stored in the housing 58 so as to separate the inflow-side liquid chamber 86 from the outflow-side liquid chamber 88, and removing prescribed liquid components from the blood a gas container 50 in which gas is preliminarily enclosed a closing member 52 one end of which is communicated with the inflow-side liquid chamber 86, the other end of which is connected to the gas container 50, and that allows communication between the gas container 50 and a space of the inflow-side liquid chamber 86 a check valve 106 provided between the inflow-side liquid chamber 86 and the gas container 50 and a clamp 110 for selectively closing a passage in an upstream side of the inflow port 82.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】血液処理フィルターの濾過材の細孔内の血液が回収でき、血液処理時に血液損失を生じることのない血液処理フィルターおよび血液処理回路を提供する。【解決手段】血液処理フィルター55は、流入口82、流出口84、流入口82と連通する流入側液室86および流出口84と連通する流出側液室88とを有するハウジング58と、流入側液室86と流出側液室88とを隔てるようにハウジング58に収容され、血液から所定の血液成分を除去する濾過材56と、予め気体が封入された気体容器50と、一端が流入側液室86と連通し、他端が気体容器50に接続され、気体容器50と流入側液室86の空間とを連通可能とする封止部材52と、流入側液室86と、気体容器50との間に設けられた逆止弁106と、流入口82よりも上流側の流路を選択的に閉塞するクレンメ110と、を有する。【選択図】図2
