Volume 89, Issue 8 , Pages 1528-1534, August 2008
Accuracy of Partial Weight Bearing After Autologous Chondrocyte Implantation
Abstract
Ebert JR, Ackland TR, Lloyd DG, Wood DJ. Accuracy of partial weight bearing after autologous chondrocyte implantation.
Objective
To determine whether patients can accurately replicate and retain weight-bearing restrictions in both stationary (static) and dynamic conditions after autologous chondrocyte implantation (ACI).
Design
Case series.
Setting
Rehabilitation clinic.
Participants
A consecutive sample of patients (N=48) who had undergone ACI to a medial or lateral femoral condylar defect in the knee.
Interventions
Patients were trained to partially weight bear using bathroom scales and forearm crutches prior to assessment.
Main Outcome Measures
A force platform was used to measure peak vertical ground reaction forces in patients during static and dynamic conditions immediately after weight-bearing instruction and training, and again during gait 7 days after training.
Results
Immediately after instruction and weight-bearing practice on a set of scales, patients exerted a mean of 15.8% body weight more than expected during walking for 20% weight-bearing trials, 8.3% more for the 40% trials, 11.9% more for the 60% trials, and 1.2% less for the prescribed 80% trials. Accuracy of weight-bearing replication improved across all weight-bearing levels when assessed 7 days later, when patients exerted a mean of 6.6% body weight more than expected during walking for 20% weight-bearing trials (9.2% body weight improvement), 4.2% more for the 40% trials (4.1% body weight improvement), 9.9% more for the 60% trials (2% body weight improvement), and 0.2% more for the 60% trials (1% body weight improvement).
Conclusions
Patients were unable to follow weight-bearing restrictions after instruction and practice on a set of scales, and patients were unable to replicate weight-bearing levels in both static and dynamic conditions.
Key Words: Rehabilitation, Weight-bearing
List of Abbreviations: ACI, autologous chondrocyte implantation, BW, body weight, PWB, partial weight bearing
Supported by the Hollywood Private Hospital Research Foundation (grant nos. RF16, RF31), the National Health and Medical Research Council (grant no. ID254622), University of Western Australia (2007 Whitfeld Fellowship).No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.
PII: S0003-9993(08)00349-3
doi:10.1016/j.apmr.2008.02.019
© 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation. Published by Elsevier Inc. All rights reserved.
Volume 89, Issue 8 , Pages 1528-1534, August 2008
