Document Detail

Repeatability and contact stress gradient detection of sealed pressure-sensitive film when used in a physiological joint model.
MedLine Citation:
PMID:  19024154     Owner:  NLM     Status:  MEDLINE    
Sealed pressure-sensitive film is frequently used to record contact characteristics in physiological joints. However, the effect on the pressure-recording characteristics of sealing the film when used in these circumstances has never been studied. This study compares the coefficient of variation, the standardized coefficient of variation, the tangent and secant contact stress gradients, and the actual pressures between unsealed and sealed Fuji film, in a simplified physiological joint model with a full-thickness surface defect. Unsealed film and sealed film were loaded through a range of nominal loads and the resulting stains were analysed by use of custom-made macros for the ImageJ image-processing program. The coefficient of variation did not exceed 5.7 per cent (sealed film), and the standardized coefficient of variation did not exceed 1.8 per cent (unsealed and sealed film). Contact stress gradients did not differ significantly. The recorded pressure at the level of surface defects was always about 0.2 MPa higher in the case of sealed film, and therefore predictable. It is concluded that sealing the film will not change the pressure-recording characteristics.
G A Matricali; L Labey; W Bartels; G Dereymaeker; F P Luyten; J Vander Sloten
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine     Volume:  222     ISSN:  0954-4119     ISO Abbreviation:  Proc Inst Mech Eng H     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2008-12-30     Revised Date:  2009-06-08    
Medline Journal Info:
Nlm Unique ID:  8908934     Medline TA:  Proc Inst Mech Eng H     Country:  England    
Other Details:
Languages:  eng     Pagination:  1065-71     Citation Subset:  IM    
Division of Musculoskeletal Disorders, Katholieke Universiteit Leuven, Leuven, Belgium.
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MeSH Terms
Image Interpretation, Computer-Assisted / methods*
Joints / physiology*
Manometry / instrumentation*
Models, Biological*
Photography / instrumentation*,  methods
Reproducibility of Results
Sensitivity and Specificity
Stress, Mechanical
Surface Properties

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

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