Flow dynamics of the St Jude Medical Symmetry aortic connector vein graft anastomosis do not contribute to the risk of acute thrombosis

The Journal of Thoracic and Cardiovascular Surgery
A RedaelliO Alfieri

Abstract

The efficacy of the St Jude Medical Symmetry aortic connector (St Jude Medical, Inc, St Paul, Minn) for coronary artery bypass is currently debated. Potential drawbacks are the biocompatibility of the endoluminal device, the need for graft manipulation during the procedure, and the 90 degrees offset of the vein graft from the ascending aorta, which may induce graft kinking and abnormal fluid dynamics. In this article, a computational approach was designed to investigate the fluid dynamics pattern at the proximal graft. Four models of hand-sewn anastomoses and two models of automated anastomoses were constructed; a finite volume technique was used to simulate realistic graft fluid dynamics, including aortic compliance and proper aortic and graft flow rates. The anastomosis geometry performance was analyzed by calculating time-averaged wall shear stress and the oscillating shear index at the toe and heel regions of the proximal graft. Time-averaged wall shear stress was significantly lower in the hand-sewn anastomosis models than in the two models that simulated the use of the aortic connector (0.38 +/- 0.07 Pa vs 1.32 +/- 0.4 Pa). Higher oscillating shear index values were calculated in the hand-sewn anastomosis models (0.15 +/-...Continue Reading

References

May 1, 1985·Arteriosclerosis : an Official Journal of the American Heart Association, Inc·D N KuS Glagov
Jun 15, 1984·The American Journal of Cardiology·M G BourassaJ Lesperance
Sep 1, 1995·Journal of the American College of Cardiology·G R DussaillantM B Leon
Nov 1, 1993·Journal of Biomechanical Engineering·D P GiddensS Glagov
Feb 1, 1996·Journal of Biomechanical Engineering·X He, D N Ku
Jul 8, 1999·Cardiovascular Surgery : Official Journal of the International Society for Cardiovascular Surgery·K S RammosS G Tsangaris
Oct 17, 2001·Journal of Biomechanical Engineering·R S KeyntonS E Rittgers
Jun 25, 2002·The Annals of Thoracic Surgery·Lars WiklundEva Berglin
Feb 13, 2003·The Journal of Thoracic and Cardiovascular Surgery·L HornikR Koerfer
May 9, 2003·The Annals of Thoracic Surgery·Thierry P CarrelBernhard Meier
May 29, 2003·The Journal of Thoracic and Cardiovascular Surgery·R L Quigley
Jun 26, 2003·The Annals of Thoracic Surgery·Michael J MackThomas S Flavin

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Citations

Aug 12, 2005·Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs·Masashi ToyamaYuichi Ueda
Mar 18, 2005·Biomechanics and Modeling in Mechanobiology·Francesco Migliavacca, Gabriele Dubini
Feb 15, 2011·Computer Methods and Programs in Biomedicine·Nenad FilipovicHendrik von Tengg-Kobligk
Jun 30, 2007·The Journal of Thoracic and Cardiovascular Surgery·Peter BergmannBruno Rigler
Apr 22, 2006·Journal of Biomechanics·Umberto MorbiducciAlberto Redaelli
Apr 30, 2008·The Annals of Thoracic Surgery·Willem J L Suyker, Cornelius Borst
Jul 29, 2006·The International Journal of Artificial Organs·C Del GaudioM Grigioni

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