laceration protection selvey oe committee march 2014 … protection.pdfkevlar® aramid fiber, 5x...
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Laceration Prevention
March 11, 2014
Robert SelveySafety & Health Services Division
Personal Protective Equipment SME
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Hazards that create lacerations
Tools with sharp surfaces Knives Razor blade tools (paint scrappers, box
cutter, Extacto®) Saws
Surfaces with sharp edges & burrs Sheet metal with sharp, serrated edges Metal tubing burrs Glass edges and shards Thin surfaces- metal, paper, plastic
Protection by: Removal or covering sharp edges & Gloves (PPE)
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Metal burr A raised edge or small pieces of material remaining on a work piece. Created after machining operations, such as grinding, drilling,
milling, engraving or turning. It is removed by de-burring- Manual; Electrochemical; Thermal
energy; & Cryogenic
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Punctures
Some likely sources to be considered in the surveillance:
Cut end of wire
Broken Glass/ Plastic
Barb Wire
Metal tubes, wire, pipes
Puncture PPE is different from Laceration PPE.
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Protectsharp pointsSome likely controls to be considered in the surveillance: Barriers Covers
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Traditional Cutting Tools What they have in common:
BLADE IS EXPOSED even when it is not in contact with the cutting material
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Somewhat safer Cutting Tools
What they have in common:
Tool has a trigger. The blade is exposed only when the trigger is engaged. But you must take pressure off the trigger for the blade to retract.
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Better tools that Lower Risk Safety features are automatic:
Blade self-retractsBlade is shielded when not cutting
As blade come further out based on friction with material being cut, Clutch on blade disengages. If friction is lost, blade snaps back in.
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Safety Level Chart for TOOLS
5 levels of safety in tools
Level 5
Hazardous during:• Picking Up• Use• Storage
Level 4
• Safe during pickup• Hazardous during use• Safe storage
Level 3• Safe during picking up • Lower Hazard during use• Safe during storage
Level 2
No Hazard duringpicking up, use, or storage
Level 5
Manually Retractable & Fixed Blade KnifesNo Safety Features
Level 4
Spring Loaded Retractable Blade Knifes
Some Safety provided
Level 3
Smart KnifesAuto Retractable Blade Safety cannot be over-ridden under normal use
Level 2
Concealed Blade Safety Cutters Unexposed blade, can not be overridden under normal use
Level 1
Bladeless Safety Cutters No metal blades, can not be overridden under normal use
Safest Least Safe
Level 1
No metal blades
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Recommended Safety Cutters
Several alternative style cutting devices were evaluated in 2012, including:
Level 3: Self Retracting blade Martego 122001 Megasafe 116006
Level 2: Concealed blade Combi 109137
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Cut Resistant gloves Meet ASTM standards Best gloves are made of man-made
fibers Kevlar, Spectra, Dyneema; Steel
Gloves that are subject to cut risk (do not meet Cut Resistant criteria)
Cotton; Leather, Nylon
Cut Protective Gloves
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Cut Resistant GlovesUsed for sheet metal handling and glass handling.
Kevlar® aramid fiber, 5x stronger than steel by weight. Flame, cut, and heat-resistance.
Spectra® polyethylene fiber that offers high cut-resistance, even when wet. Its 10X stronger than steel by weight.
Dyneema® polyethylene fiber up to 15x stronger than quality steel by weight and up to 40% stronger than aramid fibers.
Metal Mesh interlocked stainless steel mesh offers superior cut and puncture protection due to its strength. Poor comfort and fit. Conducts cold and heat.
Manufacturers use ASTM F-1790 for measuring cut protection Scale 0 – 6: Level 0 (least protective) to Level 6 (most protective).
3 - 4
3 – 4
3 – 4
6
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Cloth gloves Cotton or nylon
woven fiber Dipped fabric
• Low cost, •Moderately durable, •Good for gripping if coated, •Poor to Fair laceration resistance•Poor for abrasion resistance•Very poor puncture resistanceScale: 0 - 1
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Leather Gloves
Deerskin Pig skin Goat skin Horse hide Cow hide
•Cost more than cotton, •Fair for gripping, • Low laceration resistanceScale 0 - 1•Very durable from abrasion,•High puncture resistant (best)
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Cut Resistance
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ConclusionsEliminate injuries from lacerations by:
Removing Sharp Surfaces (deburring and covering) Using Safer Tools that reduce the exposure to sharp blades Wearing PPE that is cut resistant
SURVEILLANCEEvaluate situations to determine hazards & corrective measures