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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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