Abstract
Five oxygenators (A: Travenol LPM 50, B: Shiley M-2000, C: Bentley BOS CM 40, D: Bentley BOS 105, E: Williairi Harvey H-1700) were evaluated in 54 patients. Continuous blood oxygen saturation (by Bentley Oxysat), PaCO2, and gas to Lloodflow ratio (V/Q) were compared in each group after the temporary low flow state. Subnormal blood gas data was obtained in each group as follows; A: 70%, B: 60%, C: 44%, D: 33%, E: 30%. V/Q in C was significantly low but Sv02 below 70% was never recorded. BOS CM 40 seemed to be the choice for our current cardiopulmonary bypass. Oxysat was found to be a useful and reliable device to maintain safe conduct of cardiopulmonary bypass.
