A handheld computer as part of a portable in vivo knee joint load-monitoring system

John Szivek, V. S. Nandakumar, C. P. Geffre, C. P. Townsend

Research output: Contribution to journalArticle

Abstract

In vivo measurement of loads and pressures acting on articular cartilage in the knee joint during various activities and rehabilitative therapies following focal defect repair will provide a means of designing activities that encourage faster and more complete healing offocal defects. It was the goal of this study to develop a totally portable monitoring system that could be used during various activities and allow continuous monitoring offorces acting on the knee. In order to make the monitoring system portable, a handheld computer with custom software, a USB powered miniature wireless receiver, and a battery-powered coil were developed to replace a currently used computer, ac powered benchtop receiver and power supply. A Dell handheld running Windows Mobile operating system programed using LABVIEW was used to collect strain measurements. Measurements collected by the handheld-based system connected to the miniature wireless receiver were compared with the measurements collected by a hardwired system and a computer based system during benchtop testing and in vivo testing. The newly developed handheld-based system had a maximum accuracy of 99% when compared to the computer based system.

Original languageEnglish (US)
Article number035001
JournalJournal of Medical Devices, Transactions of the ASME
Volume2
Issue number3
DOIs
Publication statusPublished - Sep 2008

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ASJC Scopus subject areas

  • Biomedical Engineering
  • Medicine (miscellaneous)

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