University of Washington

Department of Rehabilitation Medicine

http://rehab.washington.edu/research/articles/showref.asp?id=4389


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Title:

Upper extremity joint stresses during walker assisted ambulation in post-surgical patients

Author(s):

McQuade KJ, Finley M, Oliveira AS

Year:

2011

Publication Info:

Brazilian Journal of Physical Therapy/Revista Brasileira de Fisioterapia, 15(4):332-337

Abstract:

A walker is a common device prescribed for ambulatory assistance for individuals with balance difficulties or to reduce lower extremity demands following injury or surgery. The long-term use of a walker imposes significant demands on the patient's upper extremities that may lead to increased risk for development of secondary conditions such as wrist, elbow or shoulder pain.
OBJECTIVE: To describe the joint kinematics, forces and moments of the wrist, elbow and shoulder in a sample of twenty patients that were using a walker as a result of total joint surgery of the hips and knees.
METHODS: Three-dimensional upper extremity kinematics were recorded using a motion capture system synchronized with forces and torques transmitted through a walker instrumented with force transducers in the handles.
RESULTS: Compressive forces were found to be nearly 20% of the body weight at each of the upper extremity joints, both surgical and non-surgical sides, being the greatest force at the wrist and decreasing proximally. Compression forces were greater in the non-surgical side limb at the wrist and at the elbow.
CONCLUSION: Our findings indicated that loads on upper extremity joints associated with the use of a walker for assisted ambulation are high and further studies are needed to address the cause-effect relationship between the actual joint loading and the development of secondary musculoskeletal upper extremity complaints in more frail patients.

Link to Article:

http://www.ncbi.nlm.nih.gov/pubmed/21975683


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