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Effect of wrist posture on carpal tunnel pressure while typing.

Authors
Rempel-DM; Keir-PJ; Bach-JM
Source
J Orthop Res 2008 Sep; 26(9):1269-1273
NIOSHTIC No.
20034310
Abstract
Long weekly hours of keyboard use may lead to or aggravate carpal tunnel syndrome. The effects of typing on fluid pressure in the carpal tunnel, a possible mediator of carpal tunnel syndrome, are unknown. Twenty healthy subjects participated in a laboratory study to investigate the effects of typing at different wrist postures on carpal tunnel pressure of the right hand. Changes in wrist flexion/extension angle (p = 0.01) and radial/ulnar deviation angle (p = 0.03) independently altered carpal tunnel pressure; wrist deviations in extension or radial deviation were associated with an increase in pressure. The activity of typing independently elevated carpal tunnel pressure (p = 0.001) relative to the static hand held in the same posture. This information can guide the design and use of keyboards and workstations in order to minimize carpal tunnel pressure while typing. The findings may also be useful to clinicians and ergonomists in the management of patients with carpal tunnel syndrome who use a keyboard.
Keywords
Ergonomics; Musculoskeletal-system-disorders; Repetitive-work; Cumulative-trauma; Cumulative-trauma-disorders; Muscles; Biomechanics; Carpal-tunnel-syndrome; Statistical-analysis; Computer-equipment; Office-equipment
Contact
David Rempel, Ergonomics Program, Division of Occupational and Environmental Medicine, University of California, San Francisco, 1301 South 46th Street, Building 163, Richmond, CA 94804
CODEN
JOREDR
Publication Date
20080901
Document Type
Journal Article
Email Address
david.rempel@ucsf.edu
Funding Amount
162000
Funding Type
Grant
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-00121
Issue of Publication
9
ISSN
0736-0266
Priority Area
Musculoskeletal-system-disorders
Source Name
Journal of Orthopaedic Research
State
CA
Performing Organization
University of California San Francisco, San Francisco, California
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