The effect of pathologic venous valve on neighboring valves: fluid–structure interactions modeling

Elina Soifer, Dar Weiss, Gil Marom, Shmuel Einav

Research output: Contribution to journalArticlepeer-review

Abstract

Understanding the hemodynamics surrounding the venous valve environment is of a great importance for prosthetic valves design. The present study aims to evaluate the effect of leaflets’ stiffening process on the venous valve hemodynamics, valve’s failure on the next proximal valve hemodynamics and valve’s failure in a secondary daughter vein on the healthy valve hemodynamics in the main vein when both of these valves are distal to a venous junction. Fully coupled, two-way fluid–structure interaction computational models were developed and employed. The sinus pocket region experiences the lowest fluid shear stress, and the base region of the sinus side of the leaflet experiences the highest tissue stress. The leaflets’ stiffening increases the tissue stress the valve is experiencing in a very low fluid shear region. A similar effect occurs with the proximal healthy valve as a consequence of the distal valve’s failure and with the mother vein valve as a consequence of daughter vein valve’s failure. Understanding the described mechanisms may be helpful for elucidating the venous valve stiffness–function relationship in nature, the reasons for a retrograde development of reflux and the relationship between venous valves located near venous junctions, and for designing better prosthetic valves and for improving their positioning.

Original languageEnglish
Pages (from-to)991-999
Number of pages9
JournalMedical and Biological Engineering and Computing
Volume55
Issue number6
DOIs
StatePublished - 1 Jun 2017

Keywords

  • Computational model
  • Fluid–structure interaction
  • Hemodynamics
  • Pathological valve
  • Venous valve

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