Full Content is available to subscribers

Subscribe/Learn More  >

Magnetic Vascular Positioner for Automatic Coronary Artery Bypass Grafting Does Not Significantly Increase the Risk of Failure Related to Local Fluid Dynamics: A Numeric Study

[+] Author Affiliations
Umberto Morbiducci

Politecnica di Ancona, Ancona, Italy

Raffaele Ponzini

Politecnico di Milano, Milano, ItalyCILEA, Consorzio Interuniversitario per l’Elaborazione e l’Automazione, Milano, Italy

Matteo Nobili, Alberto Redaelli

Politecnico di Milano, Milano, Italy

Paper No. SBC2007-176350, pp. 721-722; 2 pages
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME


Anastomotic devices have been recently introduced in cardiac surgery, in order to make the anastomosis procedure more quick, automatic and efficient. The Ventrica magnetic vascular positioner (MVP) constitutes an attractive anastomotic option that significantly shortens the ischemic time when creating the coronary anastomosis on the beating heart [1]. However, the implantation of the MVP connector modifies the graft configuration, consistently affecting the hemodynamics usually found in the traditional anastomosis. As local fluid dynamics could play a significant role on the onset of vessels’ wall pathologies, in this study a computational approach was designed to investigate the flow patterns in presence of the MVP. To do this, a model of standard hand-sewn anastomosis and a model of automated anastomosis were constructed, and CFD was used to simulate realistic graft hemodynamics. Synthetic analytical methods were calculated and compared for the quantitative assessment of the role played by the fluid dynamics in the activation of mechanotransduction pathways at the vessel wall, i.e., time-averaged wall shear stress (TAWSS), oscillating shear index (OSI) [2], and the very recent helical flow index HFI [3, 4]. This allowed to evaluate if the use of the MVP design increases the risks of failure related to the local bypass fluid dynamics.

Copyright © 2007 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In