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Perfusion, Vol. 13, No. 1, 53-57 (1998)
DOI: 10.1177/026765919801300107

Air trapping ability of the Spiral GoldTM membrane oxygenator: an ex vivo study

Xavier M Mueller

Department of Cardiovascular Surgery, CHUV, Lausanne

Hendrick T Tevaearai

Department of Cardiovascular Surgery, CHUV, Lausanne

Karen van Ness

Department of Cardiovascular Surgery, CHUV, Lausanne

Judith Horisberger

Department of Cardiovascular Surgery, CHUV, Lausanne

Monique Augstburger

Department of Cardiovascular Surgery, CHUV, Lausanne

Marco Burki

Department of Cardiovascular Surgery, CHUV, Lausanne

Ludwig K von Segesser

Department of Cardiovascular Surgery, CHUV, Lausanne

Despite an overall improvement in cardiopulmonary bypass (CPB) technology and materials, air emboli still occur. The latest generation membrane oxygenator from Bentley Laboratories, the SpiralGoldTM, was tested ex vivo for its air handling ability. The study was conducted on four calves. Bolus amounts of air of 10, 15 and 20 cm3 were each injected three times, upstream of the oxygenator and a bubble detector located directly downstream. The amount of bubbles was measured semiquantitatively on a 10 unit scale (U = one semiquantitative unit). The animals were killed 10 days after the CPB.

When 10 cm3 of air was injected, no bubbles were detected. With 15 and 20 cm3, respectively, 1 ± 1.5 and 5 ± 3.3 U of bubbles were detected. Despite a total of 135 cm3 of air injected as large bolus amounts, all the animals survived without any obvious neurological deficit secondary to air bubble manipulation. In conclusion, the Spiral GoldTM oxygenator per se can reliably trap an air bolus of up to 10 cm3. This feature should be taken into account when choosing an oxygenator, as it offers an additional barrier to air bubbles in the CPB circuit.


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X. M Mueller, H. T Tevaearai, D. Jegger, M. Augstburger, M. Burki, and L. K von Segesser
Ex vivo testing of the Quart(R) arterial line filter
Perfusion, December 1, 1999; 14(6): 481 - 487.
[Abstract] [PDF]