Using computational fluid dynamics to evaluate a novel venous cannula (Smart canula) for use in cardiopulmonary bypass operating procedures

Perfusion
David JeggerLudwig K von Segesser

Abstract

Peripheral access cardiopulmonary bypass (CPB) is initiated with percutaneous cannulae (CTRL) and venous drainage is often impeded due to smaller vessel and cannula size. A new cannula (Smartcanula, SC) was developed which can change shape in situ and, therefore, may improve venous drainage. Its performance was evaluated using a 2-D computational fluid dynamics (CFD) model. The Navier-Stokes equations could be simplified due to the fact that we use a steady state and a 2-dimensional system while the equation of continuity (p constant) was also simplified. We compared the results of the SC to the CTRL using CFDRC (Version 6.6, CFDRC research corporation, Huntsville, USA) at two preloads (300 and 700 Pa). The SC's mass flow rate outperformed the CTRL by 12.1% and 12.2% at a pressures of 300 and 700 Pa, respectively. At 700 Pa, a pressure gradient of 50% was measured for the CTRL and 11% for the SC. The mean velocity at the 700 Pa for the CTRL was 1.0 m.s(-1) at exit while the SC showed an exit velocity of 1.3 m.s(-1). Shear rates inside the cannulae were similar between the two cannulae. In conclusion, the prototype shows greater mass flow rates compared to the classic cannula; thus, it is more efficient. This is also advocated b...Continue Reading

References

Feb 1, 1992·The Annals of Thoracic Surgery·R E DeliusR H Bartlett
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Nov 11, 1999·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·D JeggerL K von Segesser
Mar 23, 2002·The International Journal of Artificial Organs·D JeggerL K von Segesser
Apr 23, 2003·Perfusion·David JeggerLudwig K von Segesser
Aug 23, 2005·The Heart Surgery Forum·Ludwig K von SegesserJudith Horisberger

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Citations

Apr 20, 2010·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Katharine H FraserZhongjun J Wu
Jun 21, 2011·Ultrasound in Medicine & Biology·Cara A C Leckey, Mark K Hinders
Aug 26, 2016·Innovations : Technology and Techniques in Cardiothoracic and Vascular Surgery·Ludwig Karl von SegesserFrancesco Maisano
Jun 10, 2011·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·Carmine De BartoloJoseph Zwischenberger

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