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![Page 1: © BLR ® —Business & Legal Resources Massachusetts Manufacturing Self-Insurance Group, Inc. S afety A wareness F or E veryone from Cove Risk Services Ergonomics.](https://reader035.fdocuments.in/reader035/viewer/2022070403/56649f305503460f94c4a5bf/html5/thumbnails/1.jpg)
© BLR®—Business & Legal Resources
Massachusetts Manufacturing Self-Insurance Group, Inc.
Safety Awareness For Everyone from Cove Risk Services
Ergonomics
Industrial
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© BLR®—Business & Legal Resources
Session Objectives
You will be able to:‒ Understand the principles of ergonomics‒ Recognize the risk factors, signs, and symptoms of
musculoskeletal disorders (MSDs)‒ Understand our program for identifying, reporting,
and controlling MSDs‒ Know how to protect yourself from MSD injuries
and reduce your risk
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What Is Ergonomics?
– Modify jobs to fit capabilities of people
– Reduce MSDs• Repetitive reaching,
forceful exertions, bending and lifting, or working with vibrating equipment
– Engineering controls– Safe work practices– PPE
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Musculoskeletal Disorder (MSD) Injuries
– 1.8 million MSD injuries each year
– 600,000 MSD injuries require time away from work
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© BLR®—Business & Legal Resources
Regulation Of Ergonomics
– General Duty Clause
– Applies to unregulated hazards• Failure to keep a hazard-free workplace• Hazard recognized by employer or employer’s
industry• Hazard could cause death or serious harm• Method exists to correct the hazard
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© BLR®—Business & Legal Resources
MSD-Type Injuries
Repetitive Motion
63%
Repetitive Placing, Grasping, or
Moving Objects
20%
Repetitive Use of Tools 8%
Typing or Key Entry
9%
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Characteristics of MSDs
– Occur from a single event or many small injuries– Take weeks, months, or years to develop– Produce no symptoms in early stages, but show
symptoms after injury has occurred– Contributing causes may occur at home and at work– Same MSD may differ in severity from person to
person doing a similar task
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© BLR®—Business & Legal Resources
General Signs of MSDs
– Less strength for gripping
– Less range of motion
– Loss of muscle function
– Inability to do everyday tasks
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MSD Symptoms
– Back and neckshooting pain, stiffness
– Shoulderspain, stiffness, loss of mobility
– Arms and legsshooting pains, numbness
– Elbow and knee joints pain, swelling, stiffness, soreness
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MSD Symptoms (cont.)
– Hands and wrists swelling, numbness, loss of strength
– Fingersjerking movements, or loss of strength, mobility, and feeling
– Thumbspain at the base
– Feet and toesnumbness, tingling, stiffness, burning sensation
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Outward Signs of MSDs
– Swelling or inflammation of joints
– Vigorously shaking hands
– Massaging hands, wrists, or arms
– Cradling arms
– Limping
– Stiff back
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© BLR®—Business & Legal Resources
Common MSDs
‒ Carpal tunnel syndrome
‒ Low back pain
‒ Eye strain
‒ Tendinitis
‒ Trigger finger
Image Credit: Cal OSH & NIOSH
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© BLR®—Business & Legal Resources
Common MSDs (cont.)
– De Quervain’s diseaseforceful grip
– Carpet layer’s kneecontact trauma
– Rotator cuff tendinitis repetitive motion
– Herniated disk bending and twisting
– Hand-arm vibration syndrome
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Act on the Signs of MSD
Act immediately:• Report the problem
• Seek medical attention
• Early treatment and intervention can prevent permanent injury
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What Do You Think?
1. What do you think is causing this employee’s pain?
2. How can this be improved?
Employee experiences severe back pain often.
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What Is Causing the Pain?
Possibilities:• Repetitive lifting
of heavy objects
• Twisting while lifting
• Poor lifting techniques
• Lifting above shoulders
• Single lifting injury
• Poor conditioning
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© BLR®—Business & Legal Resources
What Can Be Done?
– Use lifting aids
– Don’t twist
– Lift using your legs, not your back
– Use a stool or stepladder
– Don’t overdo it
– Keep your back in shape
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Which of these are MSD symptoms?
Check Your Knowledge
Loss of muscle function
Racing heart
Pain
Numbness
Tingling
Dizziness
Excessive cough
Stiffness
Swelling of joints
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MSDs—Any Questions?
Do you understand what MSDs are and the signs and symptoms of MSDs?
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© BLR®—Business & Legal Resources
Risk Factors That Lead to MSDs
– Repetitive motions
– Forceful exertions
– Awkward postures
– Contact stress (pressure points)
– Vibrations
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© BLR®—Business & Legal Resources
Risk Factor—Repetitive Motion
– Stress on muscles and tendons– Contributing factors
• Duration and speed of repetitious movement
• Number of muscles involved• Required force
– Raising and lowering the arm over and over again
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© BLR®—Business & Legal Resources
Forceful Exertions
– Inflammation of tendons, nerves, joints
– Contributing factors• Type of grip• Weight of object• Body posture• Type and duration of the task
Image Credit: OSHAImage Credit: OSHA
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© BLR®—Business & Legal Resources
Awkward Postures
– Stress on muscles and tendons– Contributing factors
• Reaching overhead• Force the body must maintain
to hold the position• Holding fixed positions
(static loading)
– Lifting while twisting, reaching, or turning
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Contact Stress
– Pressing against or grabbing a hard object puts pressure on nerves, tendons, and blood vessels
– Contributing factors• Repetition• Duration of contact• Grip strength required
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Vibration
– Affects tendons, muscles, joints, nerves
– Contributing factors• Prolonged grip• Restricts blood supply
to hands and fingers• Tools without vibration
dampening device• Poor power tool
maintenance
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MSDs Related To Risk Factors
• De Quervain’s disease
• Trigger finger
• Rotator cuff syndrome
• Thoracic outlet syndrome
• Hand-arm vibration syndrome
Repetition
Posture
Forceful Grip
Contact Stress
Prolonged Vibration
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Can You Identify The Risk Factors?
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Can You Identify The Risk Factors? (cont.)
– Repetitive motion– Lifting or reaching
• awkward position• excessive weight• arms raised
MSDs– Torn tendon– Tendinitis– Back pain
Risk Factors
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MSD Risk Factors—Any Questions?
– Do you understand MSD risk factors and hazards?
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Ergonomics Management
– Job assessment– MSD reporting and response system– Designated coordinator– Training– Encourage employee participation and
reporting of MSDs
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Identifying and Controlling MSD Hazards
– Determine whether MSD hazards exist and degree of risk
– Devise a control strategy with your input
– Implement control measures– Training
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Control Methods
– Install engineering controls including workstation layout and proper tools
– Institute work practice controls including neutral postures for performing tasks
– Administrative controls including rescheduling to reduce frequency or duration of exposure to MSDs
– Personal protective equipment (PPE) to provide a protective barrier between worker and MSD
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How to Protect Yourself
– Change positions often; take stretch breaks
– Maintain neutral posture whenever possible
– Eliminate or reduce MSD risk factors
– Use material-handling aids– Report MSD symptoms
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MSD Prevention and Control —Any Questions?
– Do you think you understand what you need to know about the methods to manage, prevent, and control MSDs?
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– Recognize MSD signs and symptoms
– Understand MSD hazards
– Take steps to control MSD hazards
– Participate in the Ergonomics Program
Key Points to Remember!
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Massachusetts Manufacturing Self-Insurance Group, Inc.
Safety Awareness For Everyone from Cove Risk Services