Jms Co., Ltd.

Yutaka Katsuno

Masayoshi Omori

Minoru Tanaka

Shigeki Kawarabata

Shota Nakao

A conduit tube () that communicates with an intracardiac blood inflow port () and a liquid medicine injection port () and allows blood from the intracardiac blood inflow port and a liquid medicine from the liquid medicine injection port to flow into a cardiotomy section () is inserted from above downward in the cardiotomy section. A blood flow channel () for the flow of blood and a liquid medicine flow channel () for the flow of a liquid medicine are formed independently of each other in the conduit tube. With respect to the vertical direction, the lower end of a blood conduit tube portion () that forms the blood flow channel is located at a lower position than the lower end of a liquid medicine conduit tube portion () that forms the liquid medicine flow channel. This prevents the generation of negative pressure in the liquid medicine flow channel due to the flow of blood. It also reduces the resistance to the inflow of a liquid medicine into the cardiotomy section.

Blood reservoir

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

Yutaka Katsuno