Document Detail


The relationship of the angle of immobilisation of the knee to the force applied to the extensor mechanism when partially weight-bearing. A gait-analysis study in normal volunteers.
MedLine Citation:
PMID:  17673584     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We describe the influence of the angle of immobilisation during partial weight-bearing on the forces across the extensor mechanism of the knee. Gait analysis was performed on eight healthy male subjects with the right knee in an orthotic brace locked at 0 degree, 10 degrees, 20 degrees and 30 degrees, with the brace unlocked and also without a brace. The ground reaction force, the angle of the knee and the net external flexion movement about the knee were measured and the extensor mechanism force was calculated. The results showed a direct non-linear relationship between the angle of knee flexion and the extensor mechanism force. When a brace was applied, the lowest forces occurred when the brace was locked at 0 degree. At 30 degrees the forces approached the failure strength of some fixation devices. We recommend that for potentially unstable injuries of the extensor mechanism, when mobilising with partial weight-bearing, the knee should be flexed at no more than 10 degrees.
Authors:
W S Khan; R K Jones; L Nokes; D S Johnson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of bone and joint surgery. British volume     Volume:  89     ISSN:  0301-620X     ISO Abbreviation:  J Bone Joint Surg Br     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-08-03     Completed Date:  2007-11-02     Revised Date:  2010-11-10    
Medline Journal Info:
Nlm Unique ID:  0375355     Medline TA:  J Bone Joint Surg Br     Country:  England    
Other Details:
Languages:  eng     Pagination:  911-4     Citation Subset:  AIM; IM    
Affiliation:
Department of Trauma and Orthopaedics, Stockport NHS Foundation Trust, Stockport SK2 7JE, UK. wasimkhan@doctors.org.uk
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Gait / physiology*
Humans
Immobilization / physiology*
Knee Joint / physiology*
Male
Musculoskeletal System / injuries*
Weight-Bearing
Comments/Corrections
Erratum In:
J Bone Joint Surg Br. 2007 Oct;89(10):1408

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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