PMID: 8945667Dec 1, 1996Paper

In-situ calibration of the implantable force transducer

Journal of Biomechanics
W HerzogT R Leonard

Abstract

Recently, an implantable force transducer (IFT) has been introduced [Xu et al. (1992, J. Biomech. Engng 114, 170-177)] which can be used in tight spaces where force recordings with established transducers, such as the buckle-type transducers, are not possible because of impingement artifacts. The IFT is easily implanted in chronic animal preparations; however, calibration of the IFT in terminal experiments has produced unreliable results. The problems of IFT calibration are that minute movements of the transducer within the tendon, slight misalignments of the tendon, or slight errors in the line of pull cause dramatic changes in the IFT voltage output for a given applied calibration load. Here, we propose a method that eliminates the above calibration problems primarily because the target tendon is left in situ, the calibration loads are applied by the muscles which insert into the target tendon, and the transducer is implanted into the target tendon about two weeks prior to calibration. The theoretical and experimental approaches are demonstrated for the cat patellar tendon, but in principle can be performed with any tendon. The results are repeatable, lie within expected values, and reproduce some of the basic properties whic...Continue Reading

References

May 1, 1992·Journal of Biomechanical Engineering·W S XuD L Glos
Feb 1, 1992·Journal of Biomechanics·C W Spoor, J L van Leeuwen
Nov 1, 1993·Journal of Biomechanical Engineering·D L GlosM S Levy
Jan 1, 1996·Journal of Biomechanics·W HerzogH K Nguyen

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Citations

Sep 30, 2008·Archives of Orthopaedic and Trauma Surgery·Nuria BonsfillsEnrique Gomez-Barrena
Aug 23, 2008·European Journal of Applied Physiology·N BonsfillsA Núñez
Jun 1, 2000·Journal of Biomechanics·B C FlemingB D Beynnon
May 22, 2002·Journal of Biomechanics·Ahmet ErdemirNeil A Sharkey
Dec 16, 2003·Journal of Biomechanics·D C MeyerC Gerber
May 22, 1998·Journal of Biomechanics·E M Hasler, W Herzog
Jun 9, 2004·Clinical Biomechanics·Bérangère RavaryNathalie Crevier-Denoix
Jul 21, 1999·Journal of Biomechanical Engineering·M RupertM Levy
Dec 5, 2019·The Journal of Experimental Biology·Heiliane de Brito FontanaWalter Herzog

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