Manual Dexterity Evaluation of Gloves Used in Handling Hazardous Materials

Abstract
The problems associated with hazardous materials control are numerous and complex. One of these problems involves selecting hand protection which will resist permeation for the duration of the exposure while maintaining sufficient levels of dexterity and tactility so that the worker can safely and efficiently perform the required task. This study investigated the effect of nine glove combinations on manual dexterity. These included three single glove and six double glove combinations plus the bare hand condition. The subjects performed a nut-bolt-washer assembly-dissassembly task using the Bennett Hand Tool Dexterity Test apparatus. The task required the use of a screw driver, two sizes of open-end wrenches, and an adjustable wrench, along with handling the bolt, nut, and washer while performing the assembly-disassembly task for three different bolt, nut, and washer sizes (1/2″, 5/16″, 1/4″). The response variables measured in the experiment were the time to complete each task and number of errors committed during each task. An error was defined as a drop of any of the items handled. The data was analyzed using a fixed effects randomized ANOVA model and the Duncan's Multiple Range Test. An alpha level of 5 per cent was used in the analysis. The results of the analyses showed that gloves increased the average completion time by 15 to 37%. Several double gloving combinations had significantly longer task completion times compared to single gloves.

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