An implantable electronic system for in-vivo stability evaluation of prosthesis in Total Hip and Knee Arthroplasty

Shiying Hao, John Taylor, Anthony Miles, Christopher Bowen

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Citations (Scopus)

Abstract

This paper describes an implantable system for the in vivo measurement of both micromotion and migration in applications such as Total Hip Arthroplasty (THA) and Total Knee Arthroplasty (TKA). The system is based on a modified form of linear variable differential transformer (LVDT) whose null-point is set automatically by means of a self-calibration algorithm. The self-calibration process not only allows the measuring bridge to work at maximum accuracy (i.e. for micromotion measurements) but also automatically records gross changes in position (migration). Simulations and preliminary measurements show that the calibration algorithm works correctly in spite of component tolerances and initial set up errors and that the device can measure micromotion with an amplitude as low as 1 μm with a gross displacement (migration) in the range 0∼±4 mm.
Original languageEnglish
Title of host publicationI2MTC: 2009 IEEE Instrumentation & Measurement Technology Conference
Place of PublicationNew York
PublisherIEEE
Pages171-176
Number of pages6
ISBN (Print)9781424433520
DOIs
Publication statusPublished - May 2009
Event2009 IEEE Intrumentation and Measurement Technology Conference (I2MTC 2009) - Singapore
Duration: 5 May 20097 May 2009

Publication series

NameIEEE Instrumentation and Measurement Technology Conference
PublisherIEEE

Conference

Conference2009 IEEE Intrumentation and Measurement Technology Conference (I2MTC 2009)
CitySingapore
Period5/05/097/05/09

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