defining a dexterity test battery for the evaluation of ... · defining a dexterity test battery...

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

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Questions …

defining a dexterity test battery for the evaluation of ... · defining a dexterity test battery...

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