Takeda Chemical Industries, Inc.

Junichi Azuma

Yasuhiro Tsujimoto

Masatake Hori

Yoshihiko Matsumura

Katsumi Noda

Koichi Watanabe

An apparatus for blood treatment has a housing having a blood inlet for introducing the blood to be treated and a blood outlet for exhausting the treated blood, at least one blood channel within the housing and extending from the inlet to the outlet and being constituted by a plasma-separating membrane capable of allowing the plasma component of blood to permeate therethrough while preventing the blood cells from penetrating therethrough. A blood treating material is packed in the space within the housing around the blood channel. A pump is connected to the inlet for pumping blood into the inlet. A pressure varying mechanism operatively associated with the housing imposes from outside the housing on the space within the housing pressure changes for alternately changing the direction of the pressure difference between the inside of the blood channel and the blood treating material-containing space, so that the plasma component of the blood flow in the blood channel is caused to permeate through the plasma-separating membrane toward the blood treating material to bring the plasma into contact with the blood treating material, and the plasma is thereafter caused to be returned to the blood channel through the plasma-separating membrane.

Apparatus for blood treatment by pressing blood into treating material

A hemodialysis system for use with any type of dialyzer, such as coil-type, Kiil-type and capillary-type or hollow fiber-type dialyzers, which has a fluid circulation circuit and a bypass circuit short-circuiting the fluid circulation circuit. At one junction between the fluid circulation circuit and the bypass circuit, an ejector is employed. The ejector has a nozzle, a diffuser axially aligned with the nozzle and defining an orifice and a suction chamber communicated with the orifice. During circulation of the dialysate in the circulation circuit and from the nozzle onto the diffuser of the ejector, a negative gauge pressure is developed in the suction chamber so that the dialysate can be drawn through the bypass circuit. The circulation circuit and the bypass circuit have respective coupling assemblies for removable connection with the coil-type dialyzer and with the Kiil-type or capillary-type, or hollow fiber-type, dialyzer.

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Hirakata, Japan

Junichi Azuma