Document Detail


Hydrodynamic effects of the partial opening of a trileaflet valve.
MedLine Citation:
PMID:  17946989     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Manufacturing process of medical grade silicon rubber trileaflet valves for VADs could propitiate important leaflet thickness variations which could result in partial opening of the valve and affect its hydrodynamic performance. The leaflets of a total of 10 valves were measured to assess its thickness variability. Two experiments were performed to asses the impact of the leaflets thickness variation under hypothetical situations. The first experiment was divided into three hypothetical cases. In each case either none, one or two leaflets of different valves were mechanically blocked, resembling possible critical working circumstances. The second experiment was intended to know how the variation on the leaflets thickness affects the hydrodynamic performance of the valves. The results demonstrated a significant variation on the leaflets thickness was found. As for the first experiment, a small variation on the hydrodynamic performance was found above 4 L/min flow rates and a slightly higher energy loss was found in one of the cases. As for the second experiment, the results showed that the variation of the leaflet thickness does not affect the general hydrodynamic performance of the valves. No relationship between the thickness variability and the hydrostatic performance of the valves was found.
Authors:
C Escobedo; F Tovar; A Vilá; J García; B Suárez; F Corona; E Sacristán
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  1     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2006  
Date Detail:
Created Date:  2007-10-23     Completed Date:  2008-03-13     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2896-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Biocompatible Materials
Biomedical Engineering
Heart-Assist Devices* / statistics & numerical data
Humans
Hydrostatic Pressure
Materials Testing
Prosthesis Design
Silicone Elastomers
Chemical
Reg. No./Substance:
0/Biocompatible Materials; 0/Silicone Elastomers

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


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