Post on 05-Jun-2018
AIHce – June 2-7, 2007 – Philadelphia, PA
Chantal Gauvin, Chantal Tellier, Renaud Daigle, Thierry Petitjean-Roget
Defining a Dexterity Test Battery for the Evaluation of Protective Gloves
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IRSST in brief …
IRSST carries out and finances scientific activities in seven research fields
Accidents Chemical substances and biological agents Musculoskeletal disorders Noise and vibration Protective equipment Safety of industrial tools, machines and processes Occupational rehabilitation
Established in Montreal, Quebec, Canada since 1980
130 employees
www.irsst.qc.ca
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Introduction – Occupational Safety Issues
Gloves protect hands from various hazards.
Workers often prefer not to wear gloves which impair their manual dexterity.
Dexterity in top 3 criteria for glove selection
Classification of glove dexterity would allow users to select gloves meeting their specific needs.
www.ansellpro.com/hyflex/foam.asp www.reddenmarine.comwww.bettymills.com/store/images/product/GBSM0201.JPG
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Introduction – Motivation for this Project
Different dexterity tests used for protective gloves
Difficult to compare between studies
2 dexterity standards: ASTM F2010EN 420
Need for a standardized test batteryHow many dexterity tests ?Which dexterity tests ?
www.westonsinternet.co.uk
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Objectives
To evaluate dexterity tests in their ability to discriminate dexterity with different glove models
To propose a combination of tests as a standardized test battery for discriminating a large range of glove models
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Methodology – 12 Dexterity Tests
Crawford –Pins&Collars
Crawford -Screws
EN 420
ASTM F2010
Grooved Pegboard
Purdue – Pins Dominant Hand
Purdue – Pins Non-Dominant Hand
Purdue –Assembly
Minnesota –Two Hand Turning&Placing
Minnesota –Turning
O’Connor Finger
O’Connor Tweezer
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Methodology – 9 Glove Models
A1 A2 A3 B5 B6 C7 C8 C9
Gloves A (Fine)
Gloves B (Medium)
Gloves C (Gross)
B4
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Methodology – Experimental Procedure
Purdue-Pins Dominant HandPurdue-Pins Non-Dom. HandPurdue-AssemblyO’Connor TweezerCrawford-Pins&CollarsCrawford-ScrewsGrooved PegboardEN420Minnesota-2-Hand Turn&PlacMinnesota-TurningO’Connor FingerASTM F2010
30 subjects30 subjects 12 dexterity tests12 dexterity tests 3 trials3 trials
mean
15
15
trial 1
trial 2
trial 33 glove models
B
bare hand
4 conditions4 conditions
A
C
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Methodology – Results Analysis
For each dexterity test : For each dexterity test : ANOVA (9 gloves, 2 genders) ANOVA (9 gloves, 2 genders) ( = 0.05)TukeyTukey--Kramer multiple comparison testKramer multiple comparison testSensitivity : ability of tests to discriminate glove modelsSensitivity : ability of tests to discriminate glove models
Global sensitivityGlobal sensitivity :
= 24/36 = 67%
Specific sensitivitySpecific sensitivity :
Example: Crawford – Screws Dexterity Test
67% 67% 0%
56% 67%
100%
Fine
C9C8C7B6B5B4A3A2A1
C9C8C7B6B5B4A3A2A1GrossMediumFine
Fine
Med
ium
Gro
ss
Medium Gross
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Results – Global Sensitivity
None of dexterity tests could discriminate all glove models
Tests de dextérité Sensibilitéglobale
O'Connor Finger 67%
Crawford-Screws 67%
Purdue-Pins Non-Dom. Hand 67%
Purdue-Pins Dominant Hand 64%
ASTM F2010 64%
Minnesota-2Hand Turn&Plac 58%
Purdue-Assembly 58%
Grooved Pegboard 58%
Minnesota-Turning 56%
Crawford-Pins&Collars 25%
O'Connor Tweezer 17%
EN 420 (plus petite tige) 3%
Global sensitivity
Dexterity tests
(smallest pin)
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Results – Specific Sensitivity
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Crawford-Screws
O'ConnorFinger
GroovedPegboard
Purdue-PinsDominant
Purdue-PinsNon-Dom.
Purdue-Assembly
ASTM F2010 Minn-2HandTurn&Plac
Minn-Turning
Tests de dextérité
Sens
ibili
té s
peci
fique
Crawford-Screws
O'ConnorFinger
GroovedPegboard
Purdue-Pins
Dominant
Purdue-Pins Non-
Dom.
Purdue-Assembly
ASTMF2010
Minn-2Hand
Turn&Plac
Minn-Turning
Dexterity tests
Spec
ific
sens
itivi
ty
FineFine-MediumMediumMedium-GrossGross
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2 tests : 83% (9 min)
Sensitivity (Duration time/glove)
3 tests : 86% (10.5 min)
4 tests : 92% (18 min)
Methodology – Combinations of Dexterity Tests
+ +
(Durée/gant)
+
6 min
7.5 min
1.5 min
1.5 min
1.9 min
2.9 min
3 min
4.3 min
3.1 min
Tests de dextérité Sensibilitéglobale
O'Connor Finger 67%
Crawford-Screws 67%
Purdue-Pins Non-Dom. Hand 67%
Purdue-Pins Dominant Hand 64%
ASTM F2010 64%
Minnesota-2Hand Turn&Plac 58%
Purdue-Assembly 58%
Grooved Pegboard 58%
Minnesota-Turning 56%
Dexterity tests Global sensitivity
Duration time/glove (based on 3 trials/test/glove)
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55%
60%
65%
70%
75%
80%
85%
90%
95%
0 2 4 6 8 10 12 14 16 18 20 22Total Time Duration [min]
Glo
bal S
ensi
tivity
Single testSet of 2 testsSet of 3 testsSet of 4 tests
< 15 min
> 80%
Results – Optimal Combinations
Optimal combinations proposed:
ASTM F2010
Proposed to ASTM - F23 committee :ASTM F2010 + O’Connor Finger
(based on 3 trials/test/glove)
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89%
86%
86%
83%
83%
81%
81%
Global Sensitivity
Minn-Turning
14.9xxxx7
10.9xxx6
10.4xxx5
9.5xxx4
8.9xx3
8.0xx2
7.4xxx1
Time (min)Minn-
2Hand Turn&Plac
ASTM F2010
PurdueAssembly
PurduePins Non-
Dom.
PurduePins
DominantGroovedPegboard
O’ConnorFinger
Crawford-Screws
Results – Test Batteries Proposed
Grosser dexterity tests Finer dexterity tests
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Conclusion
Global sensitivity : 9 best tests/12 between 56% à 67%
Specific sensitivity :Some tests discriminate more easily the fine or the gross dexterity gloves
Combination of complementary dexterity tests allows to increase the global sensitivity
Recommendation to ASTM F23 committee : ASTM F2010 + O’Connor Finger 81%, 8 min
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Research in Protective Equipment
Protective gloves and clothingMechanical hazards: cut and needle puncture resistance Chemical hazards protectionSuppleness and friction of glove material Dexterity and tactile sensitivity of glovePreparation of a Glove Selection GuideEtc.
Respiratory protection
Fall protection
Shoring