A novel method for measuring medial compartment pressures within the knee joint in-vivo

A novel method for the measurement of knee joint forces in-vivo is described. A thin (0.2 mm) flexible electronic pressure sensor was inserted through a narrow arthroscopic portal into the osteoarthritic medial compartment of the knee joint. The sensor partially covered the load bearing area. The su...

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Bibliographic Details
Published in:Journal of biomechanics 2003-09, Vol.36 (9), p.1391-1395
Main Authors: Anderson, Iain A., MacDiarmid, Andrew A., Harris, M. Lance, Gillies, R. Mark, Phelps, Rhona, Walsh, W.R.
Format: Article
Language:English
Subjects:
Analysis of Variance
Arthroscopy
Biomechanical Phenomena
Braces
Electronics, Medical
Feasibility Studies
Humans
In-vivo measurement
Influence
Knee
Knee brace
Knee joint
Knee Joint - physiopathology
Knee Joint - surgery
Orthopedics - methods
Osteoarthritis
Osteoarthritis - physiopathology
Osteoarthritis - surgery
Osteoarthritis - therapy
Pilot Projects
Pressure
Pressure distribution
Pressure sensing
Prostheses and Implants
Sports medicine
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Summary:A novel method for the measurement of knee joint forces in-vivo is described. A thin (0.2 mm) flexible electronic pressure sensor was inserted through a narrow arthroscopic portal into the osteoarthritic medial compartment of the knee joint. The sensor partially covered the load bearing area. The surgery was performed under local anaesthetic during normal arthroscopic examination following patient consent. Results are presented for 11 patients. The method was used in a pilot study to assess the effects of four valgus knee braces on medial compartment forces. An analysis of variance could not detect un-loading by any brace although there were large variations in force output. These variations may be attributable to shifts in the sensor position. In-vivo measurement of joint force is technically feasible.
ISSN:0021-9290
1873-2380
DOI:10.1016/S0021-9290(03)00158-1