Validation of a dynamic joint contracture measuring device in a live rabbit model of arthrofibrosis

Autor: Charlotte E. Berry, Mark E. Morrey, Christopher G. Salib, Nicolas Reina, Daniel J. Berry, Matthew P. Abdel, Andre J. van Wijnen, Lawrence J. Berglund, Loribeth Q. Evertz, Timothy E. Hewett, William H. Trousdale, Joaquin Sanchez-Sotelo
Rok vydání: 2018
Předmět:
Zdroj: Journal of Orthopaedic Research®. 36:2186-2192
ISSN: 0736-0266
DOI: 10.1002/jor.23884
Popis: The current method of measuring arthrofibrosis in live rabbits is critically limited. Specifically, this method involves radioactive fluoroscopy, error-prone goniometric measurements, and static joint angle outcomes that fail to approximate the compliance of tissues surrounding the joint. This study aims to validate a novel method of capturing the compliance of contracted tissues surrounding the joint without the use of fluoroscopy or animal sacrifice. Surgically induced contractures of one-hundred and eight rabbits were measured using the current standard of contracture measurement (a pulley system) as well as a newly designed dynamic load cell (DLC) device. The DLC device was highly reliable when compared to the pulley system (r = 0.907, p < 0.001). Finally, the DLC device produced joint stiffness hysteresis curves capable of approximating the compliance of stiff joint tissues, ultimately calculating a mean joint stiffness of 1.57 ± 1.31 N · m · rad-1 (range, 0.33-6.37 N · m · rad-1 ). In conclusion, the DLC device represents a valid method for measuring joint contractures. Further, the DLC device notably improves current techniques by introducing the capacity to approximate the compliance of contracted tissues in living rabbits. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.
Databáze: OpenAIRE
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