The OrthoSensor VERASENSE knee system is a commercially available instrumented tibial insert that provides real-time intraoperative measurements of tibial contact force and contact location to guide surgeons toward improving outcomes in total knee arthroplasty (TKA). However, the device has been used contrary to the manufacturer's instructions in several studies and lacks published information on accuracy. Therefore, the primary objectives of this study were to evaluate the device's error in tibial contact force when used according to and contrary to the manufacturer's instructions, and also to evaluate the device's error in anterior-posterior (A-P) and medial-lateral (M-L) contact locations. The error in tibial contact force in one-compartment distributed loading was evaluated by applying known forces in ranges within and exceeding that instructed by the manufacturer, with rezeroing as instructed by the manufacturer, and without rezeroing. The error in tibial contact location in one-compartment concentrated loading was evaluated by applying known forces at known locations on the articular surface. Exceeding the maximum allowable load and not rezeroing did not adversely affect the bias (i.e., average error) (p > 0.05). The maximum absolute bias without rezeroing was 2.9 lbf. Rezeroing more than doubled the bias. The maximum root-mean-squared error in tibial contact location was 1.5 mm in the A-P direction. The device measures tibial contact force with comparable error well above the maximum allowable load and without rezeroing, contrary to the manufacturer's instructions.
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December 2018
Technical Briefs
Tibial Contact Force and Contact Location Errors of the VERASENSE
Stephanie J. Nicolet-Petersen,
Stephanie J. Nicolet-Petersen
Biomedical Engineering Graduate Group,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sjpetersen@ucdavis.edu
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sjpetersen@ucdavis.edu
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Stephen M. Howell,
Stephen M. Howell
Department of Biomedical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sebhowell@mac.com
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sebhowell@mac.com
Search for other works by this author on:
Maury L. Hull
Maury L. Hull
Department of Mechanical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
Department of Biomedical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
Department of Orthopaedic Surgery,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: mlhull@ucdavis.edu
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: mlhull@ucdavis.edu
Search for other works by this author on:
Stephanie J. Nicolet-Petersen
Biomedical Engineering Graduate Group,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sjpetersen@ucdavis.edu
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sjpetersen@ucdavis.edu
Stephen M. Howell
Department of Biomedical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sebhowell@mac.com
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: sebhowell@mac.com
Maury L. Hull
Department of Mechanical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
Department of Biomedical Engineering,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817;
Department of Orthopaedic Surgery,
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: mlhull@ucdavis.edu
University of California, Davis,
4635 2nd Avenue (Building 97),
Sacramento, CA 95817
e-mail: mlhull@ucdavis.edu
Manuscript received October 19, 2017; final manuscript received June 5, 2018; published online September 25, 2018. Assoc. Editor: Paul Rullkoetter.
J Biomech Eng. Dec 2018, 140(12): 124502 (6 pages)
Published Online: September 25, 2018
Article history
Received:
October 19, 2017
Revised:
June 5, 2018
Citation
Nicolet-Petersen, S. J., Howell, S. M., and Hull, M. L. (September 25, 2018). "Tibial Contact Force and Contact Location Errors of the VERASENSE." ASME. J Biomech Eng. December 2018; 140(12): 124502. https://doi.org/10.1115/1.4040601
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