The oxygenator includes a housing having a blood inlet and a blood outlet, the blood inlet extending into the inner portion of the housing. The heat exchanger is located within the housing and is coupled to the heat exchange fluid inlet at the inlet end. The gas exchanger is also located within the housing and includes a bundle of gas exchange fibers coupled to the gas exchange fluid outlet at the gas outlet end. The oxygenator includes at least one insulator configured to thermally insulate at least the gas outlet end of the bundle of gas exchange fibers. [Selection diagram] Figure 2人工肺は、血液入口および血液出口を有するハウジングを含み、血液入口が、ハウジングの内側部分の中まで延在する。熱交換器は、ハウジング内に配置され、入口端部において熱交換流体入口に結合される。気体交換器もハウジング内に配置され、気体出口端部において気体交換流体出口に結合される一束の気体交換繊維を含む。人工肺は、一束の気体交換繊維の少なくとも気体出口端部を熱的に絶縁するように構成される少なくとも1つの絶縁体を含む。【選択図】図2