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Proceedings Paper

Design of an arthroscopic instrument for dynamic testing of articular cartilage properties
Author(s): Kevin J. Zanca; Timothy G. Morgan; Michael C. Murphy
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Paper Abstract

An instrument to estimate the dynamic properties of articular cartilage in vivo is proposed. Through the use of a mechanical indenter adapted from in vitro testing methods and an ultrasound data acquisition system, a time constant for articular cartilage can be obtained. Dynamic lumped parameter models of articular cartilage and the instrument were developed using bond graph techniques for evaluating the feasibility of microfabricating the tool. Simulation results showed that a characteristic time constant for cartilage reswelling could be measured using the probe. Measurement protocols were designed to isolate fluid resistance and cartilage stiffness. Scaling the size of the instrument down lowered the amplitude of the forces required to indent the cartilage and reduced the length of the time the surgeon would need to hold the instrument in a single position in order to perform a test.

Paper Details

Date Published: 9 July 1999
PDF: 12 pages
Proc. SPIE 3595, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems, (9 July 1999); doi: 10.1117/12.351538
Show Author Affiliations
Kevin J. Zanca, Louisiana State Univ. (United States)
Timothy G. Morgan, Louisiana State Univ. (United States)
Michael C. Murphy, Louisiana State Univ. (United States)


Published in SPIE Proceedings Vol. 3595:
Biomedical Diagnostic, Guidance, and Surgical-Assist Systems
Tuan Vo-Dinh; Warren S. Grundfest; David A. Benaron; Steven T. Charles; Richard D. Bucholz; Michael W. Vannier, Editor(s)

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