Assessment of hip and knee joint activity using an angular displacement activity monitor

F. A. Witzmann, D. B. Kettelkamp, J. P. Ryan

Research output: Contribution to journalArticle


After performing total knee or hip arthroplasty, an orthopedic surgeon would be significantly aided in monitoring oth a patient's daily limb activity could be quantitatively assessed. A device used in such assessment should not only provide accurate measurements of the afflicted joint's aggregate angular motion, but should also have a practical design that permits the patient to wear it for long periods in settings associated with daily living. Additionally, for the sake of practicality in long-term use, a device that is small, self-contained, and easily attached and detached at or near the joint would be desired. The IUPUI Activity Monitor was develobed to 1) provide accurate quantification of limb activity during long-term use, 2) adhere to the necessary criteria mentioned above, and 3) overcome deficiencies of previously developed monitors.

Original languageEnglish (US)
Pages (from-to)113-115
Number of pages3
JournalMedical Instrumentation
Issue number2
StatePublished - Mar 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)

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