Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads

Sara Matteoli; Jens E. Wilhjelm; Antonio Virga; Andrea Corvi; Søren T. Torp-Perdersen

doi:10.1007/978-3-642-21683-1_38

Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads

Sara Matteoli, Jens E. Wilhjelm, Antonio Virga, Andrea Corvi, Søren T. Torp-Perdersen

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Abstract

The aim of this study was to quantify on the measurement variation of in vivo load-displacement curves by using a group of human healthy heel pads. The recordings were done with a compression device measuring force and displacement. Twenty three heel pads, one from each of 23 subjects aged 20-35 years, were tested. The load-displacement curves showed the hysteresis, typical for a visco-elastic tissue. Seven load-displacement curves were measured for each subject. Each hysteresis was approximated by a 3rd degree polynomial, which in turn was described by two parameters: the slope and the average curvature. No statistically significant tendency (increasing or decreasing) were found for the seven polynomials (chi² test, P-values of 0.81 and 0.17 for the two parameters, respectively). The study revealed no systematic error in the recorded load-displacement curves. The mean slope and the average curvature for the 23 subjects were found to be 6.02±1.54 N/mm and 0.02±0.01, respectively. The new apparatus shows its reliability for further clinical investigations.

Original language	English
Title of host publication	IFMBE Proceedings
Editors	K Dremstrup, S Rees, M. Ø. Jensen
Volume	34
Publisher	Springer
Publication date	2011
Pages	152-155
ISBN (Print)	9783642216824
DOIs	https://doi.org/10.1007/978-3-642-21683-1_38
Publication status	Published - 2011
Event	15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics - Aalborg, Denmark Duration: 14 Jun 2011 → 17 Jun 2011 Conference number: 15 http://www.dmts.dk/nbc15/

Conference

Conference	15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics
Number	15
Country/Territory	Denmark
City	Aalborg
Period	14/06/2011 → 17/06/2011
Internet address	http://www.dmts.dk/nbc15/

Keywords

Compressibility
Reproducibility
Hysteresis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/978-3-642-21683-1_38

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title = "Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads",

abstract = "The aim of this study was to quantify on the measurement variation of in vivo load-displacement curves by using a group of human healthy heel pads. The recordings were done with a compression device measuring force and displacement. Twenty three heel pads, one from each of 23 subjects aged 20-35 years, were tested. The load-displacement curves showed the hysteresis, typical for a visco-elastic tissue. Seven load-displacement curves were measured for each subject. Each hysteresis was approximated by a 3rd degree polynomial, which in turn was described by two parameters: the slope and the average curvature. No statistically significant tendency (increasing or decreasing) were found for the seven polynomials (chi2 test, P-values of 0.81 and 0.17 for the two parameters, respectively). The study revealed no systematic error in the recorded load-displacement curves. The mean slope and the average curvature for the 23 subjects were found to be 6.02±1.54 N/mm and 0.02±0.01, respectively. The new apparatus shows its reliability for further clinical investigations.",

keywords = "Compressibility, Reproducibility, Hysteresis",

author = "Sara Matteoli and Wilhjelm, {Jens E.} and Antonio Virga and Andrea Corvi and Torp-Perdersen, {S{\o}ren T.}",

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Matteoli, S, Wilhjelm, JE, Virga, A, Corvi, A & Torp-Perdersen, ST 2011, Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads. in K Dremstrup, S Rees & MØ Jensen (eds), IFMBE Proceedings. vol. 34, Springer, pp. 152-155, 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, Aalborg, Denmark, 14/06/2011. https://doi.org/10.1007/978-3-642-21683-1_38

Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads. / Matteoli, Sara; Wilhjelm, Jens E.; Virga, Antonio et al.
IFMBE Proceedings. ed. / K Dremstrup; S Rees; M. Ø. Jensen. Vol. 34 Springer, 2011. p. 152-155.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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AU - Torp-Perdersen, Søren T.

N1 - Conference code: 15

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N2 - The aim of this study was to quantify on the measurement variation of in vivo load-displacement curves by using a group of human healthy heel pads. The recordings were done with a compression device measuring force and displacement. Twenty three heel pads, one from each of 23 subjects aged 20-35 years, were tested. The load-displacement curves showed the hysteresis, typical for a visco-elastic tissue. Seven load-displacement curves were measured for each subject. Each hysteresis was approximated by a 3rd degree polynomial, which in turn was described by two parameters: the slope and the average curvature. No statistically significant tendency (increasing or decreasing) were found for the seven polynomials (chi2 test, P-values of 0.81 and 0.17 for the two parameters, respectively). The study revealed no systematic error in the recorded load-displacement curves. The mean slope and the average curvature for the 23 subjects were found to be 6.02±1.54 N/mm and 0.02±0.01, respectively. The new apparatus shows its reliability for further clinical investigations.

AB - The aim of this study was to quantify on the measurement variation of in vivo load-displacement curves by using a group of human healthy heel pads. The recordings were done with a compression device measuring force and displacement. Twenty three heel pads, one from each of 23 subjects aged 20-35 years, were tested. The load-displacement curves showed the hysteresis, typical for a visco-elastic tissue. Seven load-displacement curves were measured for each subject. Each hysteresis was approximated by a 3rd degree polynomial, which in turn was described by two parameters: the slope and the average curvature. No statistically significant tendency (increasing or decreasing) were found for the seven polynomials (chi2 test, P-values of 0.81 and 0.17 for the two parameters, respectively). The study revealed no systematic error in the recorded load-displacement curves. The mean slope and the average curvature for the 23 subjects were found to be 6.02±1.54 N/mm and 0.02±0.01, respectively. The new apparatus shows its reliability for further clinical investigations.

KW - Compressibility

KW - Reproducibility

KW - Hysteresis

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DO - 10.1007/978-3-642-21683-1_38

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EP - 155

BT - IFMBE Proceedings

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Y2 - 14 June 2011 through 17 June 2011

ER -

Initial studies on the variations of load-displacement curves of in vivo human healthy heel pads

Abstract

Conference

Keywords

UN SDGs

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