The use of an implantable force transducer to measure patellar tendon forces in goats

D L Korvick; J F Cummings; E S Grood; J P Holden; S M Feder; D L Butler

doi:10.1016/0021-9290(95)00036-4

The use of an implantable force transducer to measure patellar tendon forces in goats

J Biomech. 1996 Apr;29(4):557-61. doi: 10.1016/0021-9290(95)00036-4.

Authors

D L Korvick¹, J F Cummings, E S Grood, J P Holden, S M Feder, D L Butler

Affiliation

¹ Noyes-Giannestras Biomechanics Laboratories, Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, OH 45221, USA.

PMID: 8964786
DOI: 10.1016/0021-9290(95)00036-4

Abstract

Patellar tendon (PT) force was measured during activity with an implantable force transducer (IFT) in adult goats. PT force, vertical ground reaction force (VGRF) and the animal's speed were recorded for standing, walking and trotting. Following data collection, animals were euthanized and the IFT calibrated in vitro. Standing PT force averaged 207 N. Maximum PT force was approximately 800 N for walking and 1000 N for trotting and occurred at mid-stance. PT force dropped from 200 N at toe-off to 0 N by mid-swing. For each activity, the PT force increased with increases in VGRF. Maximum in vivo PT stress occurred during trotting and measured 29 MPa. This study demonstrates the IFT's usefulness in measuring tendon force directly.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

MeSH terms

Animals
Biomechanical Phenomena
Gait
Goats
Patella*
Prostheses and Implants*
Tendons / physiology*
Transducers, Pressure*

Grants and funding

AR38719/AR/NIAMS NIH HHS/United States