Multilayer type membrane oxygenator has been investigated in our clinic for past ten years. Recently we completed the new type of membrane oxygenator, Nagoya University 2nd type membrane oxygenator. In this report efficiency of its gas exchange is presented. Microporous polypropylene membrane; 2500, 2402, 2502 and microporous Teflon membrane were used as gas exchange membrane.
Oxygen transfer of this membrane oxygenator was 22.0ml/min/M2 at blood flow rate 1000ml/min and O2 flow rate 2l/min. It was 26.7ml/min/M2 at blood flow rate 1000ml/min and O2 flow rate 4l/min. No difference was noted between each membrane used. This result is not satisfactory, but it will be improved by adequate selection of gas exchange membrane.
