An implantable system for the in vivo measurement of Hip and Knee migration and micromotion

Author

Hao, Shiying ; Taylor, John ; Miles, Anthony W. ; Bowen, Chris R.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Bath, Bath

fYear

2008

fDate

14-17 Sept. 2008

Firstpage

445

Lastpage

448

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 linear variable differential transformer (LVDT) whose null-point is set automatically by 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).

Keywords

biomedical measurement; calibration; differential transformers; motion measurement; prosthetics; hip-knee migration; implantable system; linear variable differential transformer; self-calibration algorithm; total hip arthroplasty; total knee arthroplasty; Bones; Bridges; Electric variables measurement; Hip; Implants; In vivo; Knee; Mechanical variables measurement; Position measurement; Surgery; implantable; micromotion; migration; self-calibration; sensor;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals and Electronic Systems, 2008. ICSES '08. International Conference on

Conference_Location

Krakow

Print_ISBN

978-83-88309-47-2

Electronic_ISBN

978-83-88309-52-6

Type

conf

DOI

10.1109/ICSES.2008.4673462

Filename

4673462