Document Detail


Short-term fatigue testing can predict medium-term pericardium behaviour.
MedLine Citation:
PMID:  22098891     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The medium-term fatigue behaviour of calf pericardium (similar to the one used to manufacture cardiac bioprostheses valve leaflets) has been studied. 96 samples were tested under fatigue subjecting them to biaxial stress at 1 Hz frequency for 5000 cycles, in 4 series of 24 samples, at several supra-physiological mean pressures and pressure amplitudes. Short-term damage parameters such as the accumulated energy consumption in 10 cycles (E(10)) and medium-term ones after 5000 cycles like total energy consumption (E(t)) and maximum displacement of the membrane (D(t)) have been evaluated. E(10) showed exponential growing tendency with pressure and linear tendency with pressure amplitude when only one parameter curve was plotted. Similar results were found when analysing E(t) and D(t). Linear correlation models were established between E(10) and E(t) and E(10) and D(t). Similar results were achieved in the four series, with excellent determination coefficients. The results confirm that the fatigue behaviour from the very first cycles of the test can predict the medium-term behaviour of the tissue by means of measurement of suitable damage markers. The tendencies observed between the parameters seem to show that the results could have been the same ones if the test had been performed at physiological pressures and amplitudes. This work opens the door to a non-destructive test of the tissue prior to employ it to manufacture valve leaflets.
Authors:
R Claramunt; J M García Páez; L Alvarez; J Spottorno; A Ros; M C Casado
Publication Detail:
Type:  Journal Article     Date:  2011-06-21
Journal Detail:
Title:  Journal of the mechanical behavior of biomedical materials     Volume:  4     ISSN:  1878-0180     ISO Abbreviation:  J Mech Behav Biomed Mater     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101322406     Medline TA:  J Mech Behav Biomed Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1929-35     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Affiliation:
Departamento de Mecánica Estructural y Construcciones Industriales, ETSI Industriales, Universidad Politécnica de Madrid, C/ José Gutiérrez Abascal, 2., 28006 Madrid, Spain.
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