Computer Workstation Safety Overvie · Musculoskeletal Overuse Injuries (RSIs, MSDs) e.g. carpal...
Transcript of Computer Workstation Safety Overvie · Musculoskeletal Overuse Injuries (RSIs, MSDs) e.g. carpal...
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Computer Workstation Safety
Overview
Mike Papakyriakou
Occupational Health & Safety (OHS)
yorku.ca/ergo
Phone: 416-736-5491 E-mail: [email protected]
Revised Sep 05, 2013
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Musculoskeletal Overuse Injuries (RSIs,
MSDs) e.g. carpal tunnel syndrome
6 weeks post surgery
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Musculoskeletal Overuse Injuries (RSIs, MSDs)
Image source: www.spokanerisk.org/Safety.htm
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Prevention is best treatment
Learn symptoms
Take corrective action early
Discomfort Pain Disability
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Symptoms
Some or all of the following:
• Tingling
• Numbness
• Weakness or clumsiness in hands; dropping things
• Pain
• Stiffness
• Burning sensation
• Heaviness
• Swelling
• Redness
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Sample Agenda for Staff Meeting
• What are MSDs
• Checklist Reference Material
• Work Organization (1st few slides)
• Chair Adjustments
• Keyboard Adjustments
• Process for getting more help
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Injury Prevention: Vary Activities
• we’re not designed for this
Image source: weblog.infoworld.com/openresource/archives/2007/06/
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Varying activities: switch tasks
Intermittent standing/walking tasks are best
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Switching tasks/activities at
home
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Alternate activities that are
NOT recommended
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How to vary activities #2
same task, different
muscles
–e-mail or phone/visit
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same task, different muscles
mouse or keyboard
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same task, different muscles (con’d)
switch hands
–mouse
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Switch hands
Briefcase
Purse
Backpack
etc
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Can you turn sitting tasks into
standing/walking tasks?
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How to vary activities #3
Image source: www.shelterpub.com/_fitness/_desk_stretches/stretches_graphic.html
Stretch
(think
opposite)
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“I don’t have time to rest (switch
tasks, stretch, etc)!” T
issu
e act
ivit
y l
evel
Time
Alternate activity (Recovery periods)
Activity Activity Activity Activity
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Tis
sue
act
ivit
y l
evel
Time
Alternate activity (Recovery periods)
10
minutes
60
minutes
10
seconds 5
minutes
How often? How long?
Short activities = short recovery times
Long activities = much longer recovery times
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Don’t wait for discomfort
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Injury Prevention: Physical Fitness
• Diet
• Rest
• Exercise
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Injury Prevention:
Workstation/Body Mechanics
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Mouse position
Demo: hand far vs close Image source: www.hp.com/ergo
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Hand posture/worksurface height
Demo-wiggle fingers
Image source: www.hp.com/ergo
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Set seat height 1st:
Keyboard/mouse not at the right height and your
heels are on the floor?
keyboard/mouse
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Lower keyboard
keyboard
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What if you can’t lower keyboard (i.e not
adjustable)?
keyboard
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Raise chair
keyboard
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…and get a footrest
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Desk/Chair adjustments
If unsure, check
instructions or ask…
–Co-worker
–Supervisor
–HSO
–OHS
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Chair/desk not the right height
& not adjustable?
Touch typists Not touch typists
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Document position
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Holding telephone handset
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Monitor position
Image source: www.hp.com/ergo
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Monitor Height
35
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Monitor Height (too high)
36
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Notebooks, Netbooks, Cellphones, etc
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Image source: http://geektyrant.com/news/2010/7/12/paramount-pictures-to-
develop-hunchback-of-notre-dame-action.html
Prolonged postures may become your
“normal” postures
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Prevention is the best treatment!
Physical fitness
Vary activities
Proper workstation setup
Proper body mechanics
Learn software shortcuts
Early intervention
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Implementing Changes
• Plan carefully, changes may create new problems
• Step by step (don't change everything at once)
• Be patient, any change may feel uncomfortable
initially
?
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Computer Workstation Overview A printable version of this slide is online.
Body parts & what makes them happy
Workstation Tips
Eyes: Looking at objects far away. Blinking.
Tilt screen for easiest reading. Test screen closer or farther away. Use bigger fonts.
Neck: Looking straight ahead, not up or down or twisted.
Top of screen below eye level, directly in front of you. Paper documents close to screen and upright. Use your hand to hold the phone not your head and shoulder. Learn to touch type.
Shoulder, elbow, wrist, fingers: Upper arms vertical. Elbows close to side. Forearms parallel to ground or sloping slightly down. Wrists straight. Fingers curled.
Set keyboard platform height & angle to match forearm angle and allow hands to float. Mouse on same level and close to keyboard (ideally on the left). Armrests supportive yet allow elbows to swing freely.
Low back: Natural curve Set seat height so knees are at hip level or slightly lower, feet flat on the floor or footrest. Seat/backrest angle so torso/upper leg angle is 90-115 degrees. Backrest height provides support for curve
Whole body: Movement Don’t sit too long. Stretch. Be active.
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Musculoskeletal Injury Prevention
Classes
1) Computer Workstation Safety
2) Back Safety Supplement
Prerequisite:
Computer Workstation Safety
Offered monthly
Check website/contact me for upcoming dates
Image source: usachppm.apgea.army.mil/ergopgm
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Back Safety Supplement – reducing back injury
risk at home, work and play
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Questions?
• yorku.ca/ergo
• Presentation slides (Site index)
• Computer Workstation Safety Overview
• More online information
• Independent Learning Module/Quiz