Jms Co., Ltd.

Shota Nakao

Masayoshi Omori

Shigeki Kawarabata

Yutaka Katsuno

Tomokazu Niitsuma

Hideki Izumida

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 blood filter device includes: a housing that includes a domeprovided with a blood inlet, a filter retaining portionthat is positioned below the dome, and a bottom portionprovided with a blood outlet; and a filterthat is mounted in a cavity of the filter retaining portion and partitions a cavity of the housing into a dome side and a bottom portion side. A sheet-like filter memberof the filter forms a plurality of pleats, and ridgelines of the respective pleats traverse the filter retaining portion in parallel respectively. The blood filter device further includes an annular holderintervening between the filter retaining portion and the filter, a annular rib substratethat is disposed facing the ridgelines of the pleats in an outer peripheral region of the filter and has a plurality of ribs inserted respectively between the ridgelines of the plurality of pleats; and a bonding resinthat is charged into outer peripheral portions of the filter including the annular holder and the annular rib substrate, and bonds the outer peripheral portion of the filter to the filter retaining portion. Gaps are ensured between the plurality of pleats of the filter, and thus air bubbles can be removed easily.

Blood filter device and method of manufacturing the same

A blood filter device has a housing that includes: a head portion () provided with a blood inlet () and forming an upper structure of the housing, a filtration portion () positioned below the head portion and forming a middle structure of the housing, and a bottom portion () disposed below the filtration portion and provided with a blood outlet (); and a filter () mounted in a cavity of the filtration portion and partitioning a cavity of the housing into a head portion side and a bottom portion side. The filter is formed of a filter sheet folded to have a plurality of pleats, and disposed so that ridgelines of the plurality of pleats traverse respectively the cavity of the filtration portion in parallel. The bottom portion has a conical portion () on the inner bottom face protruding downward to form a conical face. Due to the conical portion of the bottom portion, resistance against blood passing through the housing interior is reduced, and the pressure loss can be suppressed satisfactorily while maintaining sufficient filtration performance of the filter in a small device.

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Hiroshima, Japan

Shota Nakao