Carpal Tunnel Syndrome - Prevention
Good Office Furniture. Poorly designed office furniture is a major contributor to bad posture. Chairs should be adjustable for height, with a supportive backrest. Employers should be advised that the higher cost of a custom designed chair for a worker whose body does not fit a standard chair is still far less than the medical or absentee costs of an injured employee. Voice Recognition Software. For CTS patients who must use a computer frequently, a variety of voice recognition software packages (ViaVoice, VoiceXpress, Dragon NaturallySpeaking, IListen) are now available, enabling virtually hands-free computer use. Keyboard and Mouse Tips. Anyone using a keyboard and mouse has some options that may help protect the hands. - The tension of the keys should be adjusted so they can be depressed without excessive force.
- The hands and wrists should remain in a relaxed position to avoid excessive force on the keyboard.
- A 2003 study suggested that mouse-use poses a higher risk than keyboard use. Replacing the mouse with a trackball device and the standard keyboard with a jointed-type keyboard are helpful substitutions.
- Wrist rests, which fit under most keyboards, can help keep the wrists and fingers in a comfortable position.
- Some people recommend keeping the computer mouse as close to the keyboard and the computer user's body as possible to reduce shoulder muscle movement.
- The mouse should be held lightly with the wrist and forearm relaxed. New mouse supports (ErgoCat) are also available that relieve stress on the hand and support the wrist.
- Some people cut their mouse pads in half to reduce movement.
Innovative keyboard designs may improve hand stress: - Alternative geometry keyboards (Microsoft Natural Keyboard, Apple Adjustable Keyboard) allow the user to adjust and modify hand positions as well as adjust key tension. Most have a split or "slanted" keyboard that places the wrists at an angle. Studies suggest they are useful in promoting a neutral position for the wrist.
- The continuous passive motion (CPM) keyboard lifts and declines gently and automatically every three minutes to break tension on the hands and wrist. A report of a clerical worker with CTS who used this device found an overall improvement of 10 words per minute in the typing tests, a decrease in disability score and symptom severity, and an improvement in function.
- A keyless keyboard (OrbiTouch) is an innovative device that uses two domes. The typist covers the domes with his or her hands and slides them into different positions that represent letters.
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