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Effects of finger posture on carpal tunnel pressure during wrist motion.

Authors
Keir-PJ; Bach-JM; Rempel-DM
Source
J Hand Surg 1998 Nov; 23(6):1004-1009
NIOSHTIC No.
20030561
Abstract
Persistent elevations in carpal tunnel pressure may aggravate carpal tunnel syndrome. This study examined the effects of finger posture on carpal tunnel pressure during wrist motion. Carpal tunnel hydrostatic pressure was measured using a saline-filled catheter inserted into the nondominant wrists of 14 healthy individuals. Range of motion tasks of wrist flexion-extension and radioulnar deviation were repeated with metacarpophalangeal (MCP) joint angles of 0 degrees, 45 degrees, and 90 degrees flexion. Pressures were significantly greater with the fingers straight (MCP = 0 degrees) than when the MCP joints were flexed to 45 degrees for all radioulnar deviation angles and from 10 degrees of wrist flexion to all angles of wrist extension tested. Pressures were also significantly higher with MCP joints at 0 degrees than at 90 degrees for wrist extension angles from 10 degrees to 40 degrees. Pressures increased to over 30 mm Hg (4.0 kPa) in some wrist extension and ulnar and radially deviated postures. Finger and wrist postures should be considered when designing splints or evaluating tasks for patients with carpal tunnel syndrome.
Keywords
Hand-injuries; Posture; Carpal-tunnel-syndrome; Motion-studies; Biomechanics; Physiology; Motion-perception
CODEN
JHSUDV
Publication Date
19981101
Document Type
Journal Article
Funding Amount
162000
Funding Type
Grant
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-000121
Issue of Publication
6
ISSN
0363-5023
Source Name
Journal of Hand Surgery
State
CA
Performing Organization
Division of Environmental and Occupational Medicine, University of California at San Francisco, Richmond, California
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