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A clinical evaluation of the performance characteristics of one membrane and five bubble oxygenators: gas transfer and gaseous microemboli production

Derek T Pearson

Regional Cardiothoracic Centre and Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne

Michael P Holden

Regional Cardiothoracic Centre and Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne

Stefan J Poslad

Regional Cardiothoracic Centre and Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne

Alan Murray

Regional Cardiothoracic Centre and Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne

Philip S Waterhouse

Regional Cardiothoracic Centre and Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne

The gas transfer characteristics and gaseous microemboli (GME) production of five different bubble oxygenators (Polystan Venotherm, Harvey H-1700, Bentley BIO-10, Gambro 10 and Shiley S-100A HED) and one membrane oxygenator (Cobe CML) have been assessed during standardized clinical perfusion for open-heart surgery in 60 adult patients. The perfusionist attempted to maintain physiological levels of PaCO 2 (5 ± 1 kPa) and PaO2 (12 ± 2 kPa). Only 3% of blood gas values were within the normal range in the Bentley BIO-10 group compared with 17% for the Gambro 10, 20% for the Shiley S-100A HED, 31% for the Polystan Venotherm, 33% for the Cobe CML and 36% for the Harvey H-1700. The number of GME detected in the arterial line was significantly lower in the Cobe CML membrane oxygenator when compared with any of the five different bubble oxygenators (p < 0·001). The Polystan Venotherm released significantly less GME (p < 0·02) than the other oxygenators and the Shiley S-100A HED released significantly more GME (p < 0·02) than the other oxygenators except the Gambro 10. Low gas-blood flow ratios were not necessarily associated with low GME levels and inadequate oxygenation. This study provides meaningful data on which to base the choice of oxygenator, for clinical perfusions.

Perfusion, Vol. 1, No. 1, 15-27 (1986)
DOI: 10.1177/026765918600100103
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D. Pearson
Bleeding following open-heart surgery
Perfusion, January 1, 1990; 5(1_suppl): 53 - 56.
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