Design of an arthroscopic instrument for dynamic testing of articular cartilage properties

Kevin J. Zanca; Timothy G. Morgan; Michael C. Murphy

doi:10.1117/12.351538

9 July 1999 Design of an arthroscopic instrument for dynamic testing of articular cartilage properties

Kevin J. Zanca, Timothy G. Morgan, Michael C. Murphy

Proceedings Volume 3595, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems; (1999) https://doi.org/10.1117/12.351538
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

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.

Citation Download Citation

Kevin J. Zanca, Timothy G. Morgan, and Michael C. Murphy "Design of an arthroscopic instrument for dynamic testing of articular cartilage properties", Proc. SPIE 3595, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems, (9 July 1999); https://doi.org/10.1117/12.351538

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