PMID: 11318758Apr 25, 2001Paper

Laser Doppler velocimetry and flow visualization studies in the regurgitant leakage flow region of three mechanical mitral valves

Artificial Organs
R S MeyerJ M Tarbell

Abstract

Streak line flow visualization and laser Doppler velocimetry (LDV) were conducted in the regurgitant leakage flow region of 3 mechanical heart valve types: CarboMedics, Medtronic Hall, and St. Jude Medical. Streak line flow visualization identified regions of high regurgitant flow, and LDV measurements were focused on those locations. Maximum regurgitant flow velocities after valve closure ranged from 0.7 to 2.6 m/s, and maximum Reynolds shear stress after valve closure ranged from 450 to 3,600 dyne/cm2. These data indicate that leakage flows can generate turbulent jets with elevated Reynolds stresses even in bileaflet valves.

References

May 1, 1991·Experimental Physiology·J C HodgsonA C Field
Jan 1, 1984·Journal of Biomechanics·W TillmannJ van Gilse
May 1, 1994·Journal of Biomechanical Engineering·J T BaldwinJ M Tarbell
Jul 1, 1993·ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs·T C LamsonJ M Tarbell

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Citations

Jul 8, 2008·Journal of Biomechanical Engineering·Keefe B ManningSteven Deutsch
Jul 8, 2008·Journal of Biomechanical Engineering·Benjamin T CooperKeefe B Manning
Mar 18, 2008·Ultrasound in Medicine & Biology·Meghan L ThorneDavid W Holdsworth
Jun 3, 2004·Journal of Biomechanical Engineering·Brandon R TravisHans Nygaard

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