Patent ID: 8147753

Claim:
A heat exchanger for medical use comprising: a plurality of tubes through an inner cavity of which a heat-transfer medium liquid flows; a sealing member that seals the plurality of tubes while exposing both ends thereof, with a blood channel passing outside each of the tubes being formed in a central portion in an axial direction of the tubes; and a housing that accommodates the tubes sealed with the sealing member, wherein the heat exchanger further comprises a hollow fiber membrane that is formed of a plurality of hydrophobic and gas permeable hollow fibers and that is disposed on at least one of an entrance side and an exit side of the blood channel in the housing so that a liquid flowing through the blood channel passes through the hollow fiber membrane; and the housing comprises openings for exposing open ends of each of the hollow fibers forming the hollow fiber membrane to an area outside the housing, and gaps between an inner side of the openings and the hollow fibers are sealed.