Carpal Tunnel Syndrome and Cubital Tunnel Syndrome: Work-Related Musculoskeletal Disorders in Four Symptomatic Radiologists
Lynne Ruess1,2,
Stephen C. O'Connor1,
Kenneth H. Cho1,
Faheem H. Hussain1,
William J. Howard, III3,4,
Ryan C. Slaughter1,5 and
Alan Hedge6
1 Department of Radiology, Tripler Army Medical Center, 1 Jarrett White Rd.,
Honolulu, HI 96859-5000.
2 Departments of Radiology and Radiological Sciences and Pediatrics, Uniformed
Services University, F. Edward Hébert School of Medicine, Bethesda, MD
20814-4799.
3 Department of Occupational Therapy, Tripler Army Medical Center, Honolulu, HI
96859-5000.
4 Present address: Occupational Therapy Clinic, MCHJ-PMO, Madigan Army Medical
Center, Tacoma, WA 98431-5000.
5 Present address: Department of Radiology, Madigan Army Medical Center, Tacoma,
WA 98431-5000.
6 Department of Design and Environmental Analysis, Human Factors and Ergonomics
Laboratory, Cornell University, MVR Hall, Forest Home Dr., Ithaca, NY
14853-4401.

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Fig. 1. Drawing shows improper keyboard angulation. Note positive
tilt of keyboard resulting in wrist dorsiflexion. Such angulation often occurs
with improper tilting of adjustable tray table or by using keyboard legs found
under most keyboards.
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Fig. 2. Drawing shows improper keyboard position. High position of
keyboard at desktop level requires elbow flexion, which results in compression
of ulnar nerve in cubital tunnel.
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Fig. 3 Drawing shows ideal keyboard position. Note that elbows are
extended greater than 90° and wrists are in neutral position with keyboard
tilted downward (negative tilt). Mouse or trackball should be placed on same
tilted surface as keyboard.
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Copyright © 2003 by the American Roentgen Ray Society.