Jms Co., Ltd.

Tomokazu Niitsuma

Minoru Tanaka

Shigeki Kawarabata

Shota Nakao

Hideki Izumida

Takashi Matsushita

Shinichi Yoshida

A medical heat exchanger includes a thin tube bundlein which a plurality of heat transfer thin tubesfor letting heat medium liquid flow therethrough are arranged and stacked, seal memberstosealing the thin tube bundle while allowing both ends of the heat transfer thin tubes to be exposed and forming a blood channelwhich allows blood to flow therethrough so that the blood comes into contact with each outer surface of the heat transfer thin tubes; a housingcontaining the seal members and the thin tube bundle and provided with an inlet portand an outlet portof the blood positioned respectively at both ends of the blood channel; and a pair of heat transfer thin tube headersforming flow chambersthat respectively surround both ends of the thin tube bundle and having an inlet portand an outlet portof the heat medium liquid. The thin tube bundle is divided into a plurality of thin tube bundle unitsto, and the heat transfer thin tube headers are configured so that the heat medium liquid passes through the plurality of the thin tube bundle units successively. Heat exchange efficiency is enhanced while the flow speed of the heat medium liquid flowing through the heat transfer thin tubes is increased to suppress the increase in volume of the blood channel.

Medical heat exchanger, manufacturing method thereof and artificial lung device

A heat exchange moduleis formed by stacking pipe groups obtained by fixing a plurality of pipeswith use of pipe array holding membersto. Flow path forming membersare arranged on pipe groups in the uppermost and lowermost layers, and wallsandare provided so as to protrude from the outer-side pipe array holding members and the inner-side pipe array holding members. Flow path membersare provided between the wallsandadjacent to each other so as to allow through holesandto communicate with each other. The heat exchange moduleis housed in the housing, and while rotating the housing, a resin materialis filled into a space enclosed by the two inner-side pipe array holding members of each pipe group in the housing, interstices around the pipes present between an openingof the housing and the outer-side pipe array holding members, and interstices around the pipes present between an openingof the housing and the outer-side pipe array holding members.

Heat exchanger, method for manufacturing the heat exchanger, and method for manufacturing heart-lung machine

Method for manufacturing a heat exchanger

A hollow fiber bundle that is formed by arranging a plurality of porous hollow fiber membranesin one direction; a heat exchange pipe bundle that is formed by arranging and laminating a plurality of heat exchange pipesin one direction crossing the hollow fiber membranes and is apposed with the hollow fiber bundle; and a potting materialthat is filled in a region including both end parts of the hollow fiber membranes and the heat exchange pipes and forms a blood channel extending across the hollow fiber membranes and the heat exchange pipes are provided. The housing includes: blood portsthat face both ends of the blood channel; gas headersthat form gas portsfacing both ends of the hollow fiber bundle; and heat exchange headersthat form heat exchange liquid portsfacing both ends of the heat exchange pipe bundle. The blood flows through the blood channel and an oxygen-containing gas flows through a bore of the hollow fiber membrane so as to perform the gas exchange, and the heat exchange liquid flows through a bore of the heat exchange pipe so as to perform the heat exchange. A hollow fiber membrane-type artificial lung, in which the heat exchange part is apposed with the gas exchange part without unnecessarily increasing a priming volume, can be structured.

Hollow fiber membrane-type artificial lung

A heat exchanger includes a plurality of tubesthrough an inner cavity of which a heat-transfer medium liquid flows, a sealing memberthat seals the plurality of tubeswhile exposing both ends thereof, with a blood channel passing outside each of the tubesbeing formed in a central portion in the axial direction of the tubes, and a housingthat accommodates the tubessealed with the sealing member. The heat exchanger further includes a hollow fiber membranethat is formed of a plurality of hydrophobic and gas permeable hollow fibersand that is disposed on at least one of an entrance side and an exit side of the blood channel in the housingso that a liquid flowing through the blood channel passes through the hollow fiber membrane. The housingincludes openingsfor exposing open ends of each of the hollow fibersforming the hollow fiber membraneto the outside, and gaps between an inner side of the openings and the hollow fibersare sealed. Air can be removed while suppressing a reduction in the heat exchange efficiency.

Heat exchanger for medical use and artificial heart-lung machine

In a heat exchanger including a plurality of tubesthrough which a first fluid passes, a housingin which the tubesare installed, and sealing members for sealing a second fluid that flows over surfaces of the tubes, the housingincludes an inletfor introducing the second fluid therein and a first outletand second outletsfor discharging the second fluid, and the sealing members include a first sealing memberpositioned on one of end sides of the tubes, a second sealing memberpositioned on the other end side of the tubes, and a third sealing memberpositioned between the first and second sealing membersand. The third sealing memberis provided so that a gapis provided between the first sealing memberand the third sealing memberwhile another gapis provided between the second sealing memberand the third sealing member, and that a flow path for the second fluid is formed therein. The second outletsare provided so as to be connected to the gaps

Growing community of inventors

Hiroshima, Japan

Tomokazu Niitsuma