Patent ID: 6994824

Claim:
An artificial cardiopulmonary circuit system comprising a hollow fiber membrane oxygenator comprising: a plurality of porous hollow fiber membrane for gas exchange having a blood contact part that contacts blood on one side thereof and a gas contact part that contacts a gas on the other side thereof; and a housing that contains the hollow fiber membranes therein, wherein at least a portion of the blood contact part of the hollow fiber membrane oxygenator is coated with a polymer comprising a repeating unit represented by the following general formula (1) as a main structural component and having a viscosity at 65° C. of 5,000 poise (500 Pa·s). [Chemical Formula 3] (Wherein R 1 is hydrogen or a methyl group, R 2 is an alkylene group having 1 to 4 carbon atoms, and R 3 is an alkyl group having 1 to 4 carbon atoms).