Document Detail


Design considerations for the omniscience pivoting disc cardiac valve prosthesis.
MedLine Citation:
PMID:  6874126     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Parametric studies are conducted in an effort to determine the optimum curvature and eccentricity for concave-convex pivoting disc prosthetic heart valves. Steady-state pressure measurements with prototype valves and laser-Doppler anemometer measurements of the velocity field with a two-dimensional model are presented. These results suggest that an optimum curvature exists and that the minimum eccentricity that promotes full opening should be used. Estimates of the shear stress distribution in the wake of the valve are computed. The maximum shear stress for both the major and minor outflow areas appear to be: 1) fairly evenly distributed, 2) well below the level for damage to the formed elements of blood as they pass through the valve, and 3) above the level required for the formation of a stable thrombus.
Authors:
T H Reif; M C Huffstutler
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The International journal of artificial organs     Volume:  6     ISSN:  0391-3988     ISO Abbreviation:  Int J Artif Organs     Publication Date:  1983 May 
Date Detail:
Created Date:  1983-09-23     Completed Date:  1983-09-23     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7802649     Medline TA:  Int J Artif Organs     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  131-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Biomechanics
Heart Valve Prosthesis*
Humans
Models, Biological
Pressure
Prosthesis Design

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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