Evaluation of design alternatives for sewing scissors with respect to hand performance, discomfort and usability.

Evaluation of design alternatives for sewing scissors with respect to hand performance, discomfort and usability. Int J Occup Saf Ergon. 2017 Sep 04;:1-29 Authors: Dianat I, Asadollahi S, Nedaei M Abstract The effects of three re-designed models of sewing scissors on hand performance measures, discomfort and usability were investigated, and the results were compared with that of conventional scissors. The adjustments were made to the scissors handle with emphasis on more neutral wrist postures (bent handle - model A), correction of the thumb's position and movements (model B) and reducing hand/finger discomfort (model C) while working with the tool. The results showed some improvements in hand performance, muscular effort, usability and discomfort with scissors model B than with the conventional model. Better hand performance and usability and also lower discomfort were recorded with scissors model C compared to the conventional model. There was no significant difference between the scissors models B and C in terms of the study variables. The results suggest that the correction of the thumb's position and movement (model B) or even reduced hand/finger discomfort (model C) are perhaps more important considerations in scissors design than improved wrist posture (model A) for improving users' performance and usability of the tool. PMID: 28868986 [PubMed - as supplied by publisher]
Source: International Journal of Occupational Safety and Ergonomics - Category: Occupational Health Tags: Int J Occup Saf Ergon Source Type: research