Lecture 13 Workstation Design
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Transcript of Lecture 13 Workstation Design
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OFFICE AND WORKSTATION OFFICE AND WORKSTATION ERGONOMICSERGONOMICS
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ConsiderationsConsiderations
Computer Workstation Ergonomics Risk Factors
Common Injuries Workstation Design
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ERGONOMICS IS……ERGONOMICS IS……
The relationship of people to their tools, tasks, and environment
Tools are designed to fit the employee
What happens when things go wrong….
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COMMONLY USED TERMSCOMMONLY USED TERMS
Musculoskeletal Injuries (MSI) Overexertion Injuries (OE) Activity Related Soft Tissue Disorders
(ASTD) injuries or disorders of the muscles,
tendons,ligaments,joints,blood vessels, or related soft tissue including sprains and strains that may be caused or aggravated by work.
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Signs and Symptoms of Signs and Symptoms of MSIMSI
Signs redness swelling movement is difficult skin colour change
Symptoms pain joint stiffness tight muscles feeling “pins & needles” numbness
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IDENTIFIED POSITIONSIDENTIFIED POSITIONS
Neutral Posture (GOOD) Defined as the position our bodies take in
the absence of gravity (e.g., in space) Position in which repetitive stress injury is
least likely to occur
Static Positions (BAD) Muscles become fatigued when blood flow is
reduced
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OFFICE WORKSTATION OFFICE WORKSTATION RISK FACTORSRISK FACTORS
Awkward postures Forceful exertions Repetition Static loading Localized contact stress DISCUSSION OF EMG,
DEMONSTRATION
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IINJURIESIINJURIES
Tendonitis Bursitis Epicondylitis Eyestrain Headaches
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TENDONITISTENDONITIS Tendonitis or
tenosynovits is an
inflammation of the tendon or tendon sheath
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BURSITISBURSITIS Bursitis
bursa becomes inflamed due to excessive friction or rubbing. A bursa is a
sac like cavity filled with slippery fluid found between tendons and bony prominence-reduces friction
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Carpal TunnelCarpal TunnelCarpal Tunnel
Syndrome
When lining around tendons is inflamed, there is less space for the nerve and it becomes compressed.
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Workstation designWorkstation design Chair Monitor Keyboard Mouse Desk
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CHAIRCHAIR
Choose one with maximum adjustments and simple controls Height Seat depth Seat angle Lumbar support Arm rests Tilt
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NEUTRAL POSTURESNEUTRAL POSTURES
Sitting Head balanced naturally over shoulders (not protruding in front of body)
Shoulders relaxed, not hunched
Forearms and thighs parallel to the floor, at a 90 angle to upper arms and lower legs
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Monitor PositioningMonitor Positioning
Directly in front of body
About 18-30 inches away from body (arm’s length)
Top of monitor about eye level, or slightly below
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Key Board PositioningKey Board Positioning Keyboard tray with
adjustability (swivels left and right, tilts forward and back, allows for mouse, extends to different heights and positions)
Position so wrists are in neutral posture
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Neutral Postures IncludeNeutral Postures Include
Wrist postureWrists straight, not bent or twisted
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KeyboardsKeyboards
Several new styles of keyboards
Designed to promote neutral posture
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MouseMouse
Should be at the same level and distance as the keyboard
New mouse designs (e.g., trackball) require less index finger work
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Least flexible component
Obtain accessories to make due with existing furnishings
If able to purchase new, look for designs that will allow correct monitor, keyboard, and mouse positioning
DeskDesk
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““Real Life”Real Life”
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““Real Life”Real Life”
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““Real Life”Real Life”
““Real Life”Real Life”