laboratory ergonomics - national university of singapore
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Laboratory Ergonomics
Agenda for Today• Ergonomic Risk Recognition• Laboratory Ergonomics• Workshop Ergonomics• Office Ergonomics• Manual Materials Handling• Assignment
What is Ergonomics?Ergonomics: ‘nomoi,’ natural laws; ‘ergon,’ work.
: science of fitting workplace conditions andjob demands to capabilities of the working population
Musculoskeletal disorders: illnesses and injuries thataffect one or more parts of the musculoskeletal system
Musculoskeletal Disorder Symptoms (MSDs)
• Discomfort • Pain • Muscle fatigue • Swelling • Inflammation • Stiffness • Numbness • Tingling • Burning sensations • Heaviness • Weakness or clumsiness in the hands (dropping
things)
Ergonomic Risk Recognition
Name of Department Location of Lab
Name of Laboratory Name of PI
Name of Researcher/LO Name of Activity/Experiment
No Description/Details of Steps in Activity
Hazards Possible Accident / Ill Health & Persons-at-Risk
Existing Risk Control (Mitigation) Severity Likelihood (Probability)
Risk Level Additional Risk Control Person Responsible By (Date)
1
2 03 04 05 06 07 08 09 0
10 0
Conducted By Approved ByName
Signature
Approval date Next Revision date(Maximum 3 years)
1. Hazard Identification 3. Risk Control
Activity-Based Risk Assessment Form
Rating Severity Severity meaning Examples
1 Low No injury, injury or ill‐health requiring first aid treatment only
Minor cuts & bruises, irritation, ill health with temporary discomfort
2 Medium Injury requiringmedical treatment or ill health leading to disability
Lacerations, burns, sprains, minor fractures, dermatitis, deafness, work‐related musculoskeletal disorders
3 High Fatal, serious injury, or life‐threatening occupational disease
Amputations, major fractures, multiple injuries, occupational cancer, acute poisoning and fatal diseases
Laboratory Ergonomics
Topics• Pipetting• Pipetting safety (UCLA video)• Microscopy• Biosafety Cabinets and Laboratory Hoods• Microtomes• Cryostats• Flow cytometers• Glove boxes, anaerobic chambers• Micromanipulation, fine motor skills• Musculoskeletal Exercises for Laboratory Personnel• Group exercises• Summary Video (Safety Care)
Common MSDs among laboratory personnelDisorder Description Laboratory TasksDe Quervain’stenosynovitis
Tendon sheath swelling, occurs in abductor and extensor tendons of thumb
Forceful grasping or turning of hard objects (e.g., vials)
Rotator cuff tendonitis Inflammation of supraspinatus muscle to upper arm bone
Repetitive tasks where elbows are above mid-torso height
Trigger finger Tendon surface becomes irritated and rough, sheath inflamed and undergoing progressive constriction
Repetitive work opening vials, closing vials, pipetting and cover slip applications
Low back injuries Back muscles, ligaments injured from repetitivepulling, straining
Awkward lifting of centrifuge rotors
NIEHS, 2003
Pipetting ErgonomicsRisk Factors
• Repetitive motion of the hands, forearm, thumb or fingers
• Pinch grip when handling pipette tips
• Bending and twisting of wrist
• Working with ‘winged’ elbows (i.e., elbow held at an elevated position away from the body)
Control Measures
• Use of electronic, or lightweight pipette
• Alternate right and left hand to pipette
• Multifinger controls• Use pipette that requires
little force. Use minimal pressure
• Limit periods of continuous pipetting to ≤ 20 min
• Work with arms close to body
Pipetting Ergonomics
Courtesy of University of Guelph
Pipetting Ergonomics
Courtesy of University of British Columbia
Pipetting Safety Videohttp://www.youtube.com/watch?v=bqAsXMSs27s
Microscopy Ergonomics
Risk Factors• Awkward & static posture of
the lower back, neck, head• Lack of adequate leg &
knee clearance • Working with elbows winged• Pinch grip when adjusting
binocular eyepiece• Wrist & palm contact
pressure • Eye strain & fatigue
Control Measures• Keep elbows close to sides• Wrists in neutral (straight)
position• Avoid forearm & wrist contact
pressure• Feet flat on floor and
supported by footrest• Avoid raising shoulders and
bending neck• Use fully-adjustable ergo chair• Use microscope arm supports• Ensure sufficient knee & leg
space• Take microbreaks (20-180 sec
at 10-15 min intervals)
Recommended Controls based on Duration• 1 - 2 hours a day
- Adequate clearance between thigh and desk with leg free from obstruction
• 2 – 6 hours a day- Microscope tilted slightly forward; use of extended
eyepieces, eye level adjustments- Use armrests, padded edges
• More than 6 hours a day- Adjustable microscope eyepieces- Video monitor/TV screen for examination of repetitive
specimens- Easily adjustable work surface
Courtesy of NIEHS
Recommended Eyetubes
Courtesy of University of Guelph
Adjustable Microscope Tools
Courtesy of University of Guelph
Microscope Arm Rests
Courtesy of University of Guelph
Courtesy of Lawrence Livermore National Laboratory
Biological Safety Cabinet/Fume Hoods: Risk Factors• Repetitive motions of hands, wrist, forearms (e.g., pipetting)
• Constrained knee and leg space
• Contact pressure on forearms, wrists, knees, legs
• Constrained body position
• Working with elbows winged
• Overreaching
• Forward, hunched posture
Courtesy of Yale University
BSC /Fume Hood Ergonomic Controls• Fully adjustable ergonomic chair, foam padding• Position materials as close as possible to the user to
avoid overreaching• Avoid prolonged contact pressure• Keep view window of BSC clean, line of sight
unobstructed• Use of anti-fatigue mat• Use proper sitting posture & positioning• Take frequent mini-breaks to stretch muscles and relieve
forearm & wrist pressure
Biological Safety Cabinet: Ergonomic Controls
Courtesy of University of Guelph
Fume Hoods: Ergonomic Controls
Courtesy of Lawrence Livermore National Laboratory
Courtesy of University of British Columbia
Microtome/Cryostat ErgonomicsRisk Factors• Repetitive tasks (e.g.,
replacement of specimens)
• Forceful exertion on microtome wheel
Risk Controls• Retrofit with adapter to allow pistol grip
with handwheel• Reduce force when operating
handwheel• Utilize front pedal type instead of hand-
operated wheel• Apply padding to work surface• Rotate tasks, take frequent short
breaks• Use a fully adjustable ergo chair• Place microtome on appropriate work
height• Adequate clearance for legs, thighs
Cryostat Ergonomics
Courtesy of University of Michigan
Cryostat Ergonomics
Courtesy of University of Guelph
Flow Cytometer ErgonomicsRisk Factors• Frequent lateral bending• Neck and back flexion• Extended arm reaching• Awkward sitting position
Risk Controls• Place a block between flow
cytometer and workbench• Use of hydraulic adjustable
table• Fully adjustable ergo chair
with footrest• Screen display at eye level
Flow Cytometer Ergonomics
Courtesy of Harvard University
Glove Chamber Ergonomics
Risk Factors• Extended static loading
on shoulders• Frequent side reaching• Thick gloves
overcompensate on grip strength
Risk Controls• Move materials to main
chamber at one time• Use highly absorbent
hand powder for glove comfort
• Provide anti-fatigue mats• Take short breaks to
perform stretching exercises
Glove Chamber Ergonomics
Courtesy of University of Guelph
Micromanipulation ErgonomicsRisk Factors• Repetitive use of
extensor, flexor muscles of fingers, wrist
• Removing caps, lids from vials
• Use of forceps• Reaching into bins• Awkward postures
Risk Controls• Use plastic vials with fewer
threads• Use small pieces of foam where
fingers and forceps articulate• Practice using forceps between
first and second digits of hand• Tilt storage bins toward worker• Take short breaks• Do hand, wrist, forearm exercises
Pinch Grips
Courtesy of Lawrence Livermore National Laboratory
Micromanipulation Ergonomics
Courtesy of University of Guelph
Micromanipulation Ergonomics
Courtesy of Lawrence Livermore National Laboratory
Moving Centrifuge Rotors• Use a team approach for
lifting heavy centrifuge rotors
• When moving rotors from one area to another, use a cart or trolley
• Use lighter-weight rotors• For very heavy rotors,
implement a pulley system which would attach to the ceiling directly to the centrifuge Courtesy of Yale University
Musculoskeletal Exercises for Laboratory Personnel
Shoulder Rolls
• Relax and hang armsat sides.
• Roll shoulders upand backwards 3-5times.
• Repeat in theopposite direction.
Courtesy of UCLA
Body Reach And Rotation
• Stand as tall aspossible and reacharms up as high aspossible.
• Rotate to the left,then to the right.
• Rotate slowly,repeating 3-5 times.
Courtesy of UCLA
Backwards Bend
• Stand with hands on hips or in lower back curve.
• Bend back, moving shoulders and head backwards.
• Return to upright position.
• Hold 5 seconds. Relax and repeat 2-3 times.
Courtesy of UCLA
Overhead Stretch
• Interlace yourfingers above yourhead.
• Turn your palmsupward as you pushyour arms back andup.
• Hold for 20 seconds,then relax andrepeat.
Courtesy of UCLA
Reaching Stretch
• Interlace your fingersout in front of you atshoulder height.
• Turn your palmsoutward as youreach forward.
• Hold for 20 seconds,then relax andrepeat.
Courtesy of UCLA
Triceps Stretch• With arms overhead,
hold the elbow ofone arm with thehand of the otherarm.
• Gently pull the elbowbehind your head,creating a stretch.Move slowly.
• Hold for 15 seconds• Repeat with other
armCourtesy of UCLA
Shoulder Stretch
• Gently pull your elbow across your chest toward your opposite shoulder.
• Hold stretch for 10 seconds.
• Relax and repeat with other arm.
Courtesy of UCLA
Chest And Back Stretch
• Clasp your handsbehind your back.
• Slowly turn yourelbows inward andstraighten arms.
• Lift your arms upbehind you until youfeel a stretch.
• Hold for 5 -15seconds.
Courtesy of UCLA
Chair Rotation Stretch• Sit in chair. Wrap feet
around chair legs tostabilize your body.
• Reach across body andgrab the back of thechair
• Pull gently to increasethe stretch in the middleof your back.
• Hold 20 seconds. Repeatreaching to oppositeside.
Courtesy of UCLA
Forearm Stretch - Extensors• Hold arm out straight at
waist level with your palmdown towards the floor.
• With fingers of the otherhand, gently press downagainst knuckles until youfeel a stretch in the top partof your forearm.
• Keep shoulders relaxed.• Hold for 5 to 15 seconds.
Courtesy of UCLA
Forearm Stretch - Flexors• Hold arm out straight at
waist level.• Turn your palm up towards
the ceiling and point your fingers down towards the floor.
• With fingers of the other hand, gently press down against your palm and fingers until you feel a stretch in the top of your forearm.
• Keep shoulders relaxed. • Hold for 5 to 15 seconds.
Courtesy of UCLA
Class Activity
Courtesy of University of Guelph
Courtesy of Dr. Tessy Joseph
Courtesy of University of British Columbia
Laboratory Ergonomics Videohttps://ivle.nus.edu.sg/bank/media/viewmedia.aspx?Ch
annelID=707aadea-2726-4d53-8854-4f325c2ca818&MediaItemID=fcdc4e17-6ae1-4e2a-83f0-0579c90ff0fb&Player=WMP&Referrer=EC&eu=oshbaa
Ergonomics in Workshops
Common Activities in NUS Workshops• Drilling• Grinding (bench-mounted, horizontal surface,
pedestal)• Welding (Arc and Gas)• Silver Soldering• Cutting (carbide• Sawing (band saw, circular saw)• Milling• Turning• Pressing (power hydraulic press)• Clamping
Risk Factors & ControlsRisk Factors• Awkward posture (e.g.,
bending, stooping, reaching)
Risk Controls• Adopt steady posture
Risk Factors and Controls Risk Factors• Pinch grip
Risk Controls• Power grip
Courtesy of NIOSH
Risk Factors and ControlsRisk Factors• Use of a tool handle
when hand force is applied horizontally
Risk Controls• Use a tool with bent
handles when force is applied horizontally
Courtesy of NIOSH
Risk Factors and Controls
Risk Factors• Use of tool with bent
handle when hand force is applied vertically
Controls• Use of tool with straight
handle when hand force is applied vertically
Courtesy of NIOSH
Risk Factors and ControlsRisk Factors• Use of tool whose handle
is too short
Risk Controls• Use a tool with handle
length longer than widestpart of your hand (4 to 6inches)
Courtesy of NIOSH
Risk Factors and Controls Risk Factors• Repeated pressure on
finger (e.g., using trigger on power tool)
Risk Controls• Use of battery or
pneumatic-powered tool
Courtesy of NIOSH
Risk Factors and Controls
Risk Factors• Forceful twisting motions
(e.g., tightening a standard lock nut)
Risk Controls• Pick a tool that will keep
wrist and elbow straight• Use of quick-threading
lock nut
Courtesy of NIOSH
Gutmann, 2005
Improving Hand Tool Use
Gutmann, 2005
Risk Factors and ControlsRisk Factors • Tools having finger
grooves
Risk Controls• Use tools with soft grip
and spring-loaded handle, tools with offset handles
Courtesy of NIOSH
Risk Factors and ControlsRisk Factors• Operating vibrating tools
(e.g., needle guns,chipping hammers, rotaryhammer drills)
Risk Controls• Use reduced vibration
power tools• Anti-vibration gloves
Courtesy of NIOSH
Risk Factors and Controls
Risk Factors• Repeated/continuous
contact with non-rounded desk edges, unpadded narrow tool handles)
Risk Controls• Install round or pad
edges of guards, worktables
Courtesy of NIOSH
Risk Factors and Controls
Risk Factors• Wrist deviations
Risk Controls• Use a turntable to hold
the work
Courtesy of NIOSH
Office Ergonomics
Topics• Recognition (checklist)• Chair• Desks• Monitor• Laptops• Keyboard• Computer mouse• Other office accessories• Arranging your office• Office Ergonomics Video (UCLA)• Group exercises
Common MSDs among office workers
Disorder Description Office TasksCarpal tunnel syndrome Compression of median
nerve of wristTyping, keying
Cubital tunnel syndrome Compression of ulnar nerve below elbow notch
Resting forearm near elbow on hard surface
Neck tension syndrome Irritation of trapeziusmuscle of neck
Typing, keying
Shoulder tendinitis Shoulder disorder of rotator cuff
Packing, storing,reaching, lifting
Thoracic outlet syndrome
Compression of nervesand blood vessels of clavicle
Typing, keying, stacking, material handling, carrying heavy loads with extended arms
Anna (ed.), 2011
Proper Working Posture at the Computer• Feet supported on the floor, or with a footrest• Thighs supported by chair seat with no pressure caused
by front edge of the seat under the thighs• Upper body upright with lower back firmly supported by
the backrest• Shoulders in relaxed position, not hunched• Elbows and upper arms close to the body• Forearms parallel to the ground, wrists in a neutral
position (straight) when utilizing keyboard & mouse• Neck remains in neutral position (i.e., not looking
upwards or downwards) when viewing the monitor
An “Ergonomic” Chair• 5 caster swivel base• Armrests• Height adjustable seat pan• Tilt adjustable back rest• Seat pan wide and deep enough to fit user comfortably,
adjustable in angle• Padding for low back area that is curved to fit the shape
of the back• Height adjustable back rest• Backrest wide enough to fit the back comfortably
Desk Arrangement
• Items on desk should be arranged based on their weight, frequency of use• Frequently used items should be located close to the user at a minimal
reach distance.
SS514, 2005
The Monitor: Good Practices• Screen located approximately an arm’s length away from the
user
• Screen is located directly in front of the user, and can be raised if required
• Top of screen is approximately at eye level. Centre of screen is at shoulder height.
• Glare and reflection on screen are eliminated.
• 20 meters away for 20 seconds every 20 minutes to rest the eyes
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Laptop Computers
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Laptop Computers: Good Practices• Get a large screen• Place the screen at eye level• Don’t slouch• Use a separate keyboard (for extended periods)• Use a separate mouse• Recline slightly• Knees should be at about the level of your hips• Make your chair work for you• Take a break• Travel light
Computer Keyboard: Good Practices• Put keyboard slightly below elbow level and close to
body. • Keyboard should be angled in a way that wrist
remains straight
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Computer Mouse: Good Practices• Place mouse on mouse mat
• Ensure wrists in neutral position
• Mouse pad should be placed as close as possible to thekeyboard
• Keyboard and mouse should be positioned at the samelevel
SS 514, 2005
Office Ergonomic Accessories: Document Holder• Useful for assisting the neck to remain in neutral position• Should be the same distance from the eyes as the
monitor and at the same height as the monitor
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Office Ergonomic Accessories: Footrest• Recommended when keyboard users are unable to
firmly position their feet on the ground
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Office Ergonomic Accessories: Wrist Rest• Reduce contact pressure on wrists from sharp
workstation edges• Heel of hand should only be resting on wrist pad
when taking a break• Be high enough to keep wrist in straight, neutral
position• Be made of moderately firm and comfortable material
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Office Ergonomic Accessories: Headset• Important for ensuring neck remains in neutral
position when phone is used for frequent/extendedperiods of time
• Prevents unnecessary muscle activity of arms andshoulders
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Stretches for Wrists and Arms
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Stretches for the Neck
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Upper Body Stretches
Courtesy of Occupational Health Clinic for Ontario Workers Inc.
Arranging your Office• Files and books that are used most often should be kept
within reach.• Frequently used files are in the middle drawer or closest
to elbow level• Locking system for filing cabinets so that no more than
one drawer can be opened at once• File and desk drawers should be kept closed when not
in use to avoid trips, bumps and scrapes• Heavy books should be placed on the middle shelf or
around elbow level
Office Ergonomics Videohttp://www.youtube.com/watch?v=IAMKVJnHNsA
Exercise
Exercise
Manual Materials Handling
Topics• Definitions• Body physics: core muscles, biomechanics• Risk Factors• Risk Controls• Proper Lifting Techniques: Safe Lifting in Laboratory• Case Studies: group exercises
Risky MovesCertain actions are more likely to cause backinjuries than others. Anytime you find yourselfdoing one of these things, you should think:DANGER!My back is at risk!
Heavy lifting...especially repetitivelifting over a long period of time
Twisting at the waist while lifting orholding a heavy load.
Reaching and lifting...over your head oracross a table.
More Risky Moves
Lifting or carrying objects with awkward or odd shapes
Working in awkward, uncomfortablepositions...gardening, kneeling, tasks that require you to bend over for long periods of time...
Also, sitting or standing for too longwithout shifting.
Core Strength Muscles
Courtesy of Pilates Workers of New York Inc.
103
Biomechanics of the BackStanding up Straight
23 kg
5 cm
force on spine
4.5 kg
45 kg
25 cm
Adding up load:Load in hands 4.5 kg.Torso weight 45.0 kg.Muscle force 23.0 kg.Total load 72.5 kg.
Lifting Guide:Goal ≤ 347 kilograms
Balancing of forces:(5 cm.) x (n kg.) = (25 cm.) x (4.5 kg.)
n = 23 kg.
104
Biomechanics of the BackStooping Forward
Adding up load:Load in hands 4.5 kgTorso weight 45.0 kgMuscle force 270 kgTotal load 319.5 kg
270 kg
5 cm
force on spine
25 cm
4.5 kg
45 kg
50 cm
Torso and arm weight
Resultant muscle force
Load in the hands
Lifting Guide:Goal ≤ 347 kilograms
Balancing of forces:(5 cm) x (n kg) = (50 cm) x (4.5 kg) + (25 cm) x (45 kg)
(5 cm) x (n kg) = 225 cm kg + 1,125 cm kgn = 270 kg
Primary Risk Factors Risk of low back pain injury when lifting/carrying objects depends on 5 main factors:
- Weight of object- Distance of object from body- Body position while carrying/lifting object- Frequency of lift- Twisting while carrying load
106
Biomechanics of the Shoulder
Preferred posture:Strongest and most stable
Raising the elbow to shoulder height or higher:• Significantly reduces shoulder strength • Increases the risk of injury
Arms close to the sides Arms extended away from the body
Gutmann, 2005
107
Risks of Pushing and Pulling
MSD injury risk:Upper and lower backHand, arm and shoulderLegs, ankles and feet
Other issues:Feet slipping
Gutmann, 2005
The Forces InvolvedAnytime you bend or lean over to pick something up withoutbending your knees, you put tremendous pressure on yourlower back.
If your waist is not centered, lifting a 4.5 kg object actually puts45 kg of pressure on your lower back.
Gutmann, 2005
The further you bend, and the more you extend your arms, the more significant
the risk of injury!
Gutmann, 2005
Contributing Factors to Handling/Lifting InjuriesPoor Physical Condition…
Stomach muscles provide a lot of the supportneeded by your back.Weak, flabby stomach muscles may preventthe back from getting the support it needs,especially when lifting or carrying heavyobjects.
Poor postureIt is best to try to maintain the back in its natural "S" shapedcurve. You want to avoid leaning forward (unsupported)when you sit, or hunching over while you're standing.
Contributing Factors to Handling/Lifting Injuries
Gutmann, 2005
Contributing Factors to Handling/Lifting Injuries
Extra weight…The more you weigh, the morestress it puts on your backevery time you bend over--on a10:1 ratio.
Risk Factors to Handling/Lifting Injuries
Stress…Tense muscles are more susceptible to strains and spasms.
Risk Factors to Handling/Lifting InjuriesOverdoing it…Don’t be afraid to say, “This is too heavy forme to lift alone. Will you help me?”
Gutmann, 2005
Preventing Lifting Injuries
Basic Guidelines• Plan the lift (3-2-1 LIFT!)• Object closed and centered to the body• Diagonal footing when lifting an object off
the floor• Use ‘core strength’ muscles: upper, middle
and lower abdominal muscles• Bend the knees, lift with the legs• Look ahead• Don’t do it alone
Preventing Lifting Injuries Avoid Lifting and Bending Whenever You Can!
Place objects up off the floor. Set object to carry downon a table or elevated surface instead of on the floor
Raise / lower shelves. The best zone for lifting is betweenyour shoulders and your waist. Put heavier objects onshelves at waist level, lighter objects on lower or highershelves.
Safe Lifting in Laboratories
Small light loads (one person lift)
Courtesy of: Imperial College, London
Moderately heavy loads (one person lift)
Courtesy of: Imperial College, London
Large Light Loads (One Person Lift)
Courtesy of: Imperial College, London
Moderately Heavy/Heavy Loads (2-person lift)
Courtesy of: Imperial College, London
Moving very large items
Courtesy of: Imperial College, London
Moving under bench cupboards
Courtesy of: Imperial College, London
Moving 5-leg chairs: one person lift
Courtesy of: Imperial College, London
Preparing Gas Cylinders for Transport• Steel toe capped shoes and industrial grade gloves
should be worn• Undo securing bars on trolley and place near/under
cylinder• Unhook chain from the rack and place palm of your hand
on top of cylinder neck• Tilt cylinder slightly forward so it rests on the rim of the
base. Use the other hand to rotate the cylinder from therack to the trolley
• Fasten securing bars on trolley• Place one foot on axle and tilt trolley back so it balances
comfortably on the wheels
Transporting Gas Cylinders• Cylinders must always be transported in a trolley• NEVER attempt to move a cylinder with a neck higher than
your shoulder• DO NOT lift by the protective cap/guard• Set trolley down in front of the wall rack or bench clamp in
the laboratory• When removing cylinder from trolley, rotate cylinder from
trolley to rack• Make sure cylinder is secured to bench clamp or wall rack• NEVER let a cylinder stand alone with its base unsupported• NEVER transport cylinders with pressure regulator and
hose attached
Transporting Gas Cylinders
Courtesy of: Imperial College, London
Exercise
Courtesy of Univ. of Guelph
Exercise
Courtesy of Univ. of Guelph
Other Lifting Tips • Reduce the amount of weight to be lifted as much as
possible.
• Keep a clear view ahead when carrying/moving a load.Never carry a load in front of your face.
• Use handles and lifting straps
• Push a dolly or cart in a linear motion. Never pull, asit forces you to twist at the waist!
• Get help if the shape is too awkward or the object istoo heavy for you to lift and move by yourself!
• Know your body's limitations. Be aware of yourbody position at all times
• Learn to recognize situations where your back ismost at risk: bending, lifting, reaching, twisting,etc.
• Take measures to avoid an injury by using thistraining whenever you handle or lift materials
Practice Body Management
Case Study Activity• A full 10 litre mobile phase container had to be
manually handled from a trolley onto the top of aHPLC machine. This was performed once a day.
• When full, the container weighed 14kg. The lift fromthe trolley to the HPLC was a short distance butrequired the lifter to handle the container with theirarms outstretched at or above shoulder height.
• The container was also difficult to handle as therewere no handles and it has a smooth glass surface.It could easily be dropped creating a safety hazard inaddition to the musculoskeletal risk.
Gutmann, 2005
The Solution• The nature of risk came mainly from a combination of the weight and position
of the load. Thus the short-term solutions focused on reducing the weight ofthe container and relocating it into a more convenient position. This wasachieved by introducing a 5 litre container and to cease using the 10 litrecontainer.
• This resulted in the weight being halved to 7kg per container. Female membersof staff now feel able to handle the containers much more comfortably.
• Relocation of the container was affected by re-organising the HPLC machinesto allow for adequate space on the worktop. This involved simply removing thetop two sections of the machine and placing them by the side, allowing thecontainer to then be placed on top of them. This resulted in the container beinghandled just above waist height whilst being able to keep the arms closer tothe body during handling. This approach has now been adopted generically forHPLC machines within the laboratories.
Gutmann, 2005
Class Activity
Courtesy of Dr. Tessy Joseph
Assignment• Download and print the Laboratory Ergonomics
Checklist found at the OSHE Staff Portal, under“Ergonomics” tab. Fill out the checklist manually.
• For any ‘No’ ticks, fill out the necessarychanges/modifications to be adopted. If thechange/modification is missing from the list, proposeyour own under the ‘Comments’ column
• Only fill out the appropriate tool/equipment you use inthe laboratory. For tools/equipment not used, leave thatsection blank
• Scan checklist and email to: [email protected] on orbefore April 25, 2012
• Only participants who completed the checklist will beawarded a Certificate of Completion
Office and Laboratory Ergonomics Manuals