Evaluation of local muscular load among seamstress of car seat cover sewing industry Part 2: The use of the time frame and measurement of the number of movements to evaluation of local muscular load

Česká verzia

Authors: R. Ulbrichtová ¹; J. Buchancová ^1,2; M. Hrušková ²; M. Marušiaková ³; T. Záborský ³; V. Jakušová ¹; H. Hudečková ¹
Authors place of work: Ústav verejného zdravotníctva JLF UK Martin, Univerzita Komenského Bratislava, vedúca prof. MUDr. Henrieta Hudečková, PhD., MPH ¹; ŽILPO, s. r. o., Žilina vedúci MUDr. Štefan Zelník, PhD. ²; Regionálny úrad verejného zdravotníctva, Martin vedúca úradu MUDr. Mgr. Tatiana Červeňová, MPH, MHA ³
Published in the journal: Pracov. Lék., 71, 2019, No. 1-2, s. 5-12.
Category: Original Papers

Summary

Introduction: Work associated with excessive physical load performed for a long time and unilaterally can be the health risk associated with damage of upper extremities structures. As a result of the occupational diseases due to the repetitive strain injury, many employees are laid off from the working process every year. Applying to other workplaces/professions as a result of occupational diseases is often a problem. The choice of works is significantly limited with regard to health state and qualifications of employees.

Material and method: Two seamstresses were randomly selected from ensemble of 62 seamstresses for analysis of working exposure. The analysis was performed in car seat cover sewing industry in 2 types of models (Toyota Avensis, Renault Clio). From the time frames and performed analyses of working activities are presented the results of the number of movements performed by the left and right upper extremities in individual working activities. The numbers of movements were calculated by Kinovea, and analyzed in the program Microsoft Excel and EpiInfo. The results were compared with the limits set by legislation.

Results: When analyzing the number of movements and their comparison with the recommended limits, the numbers highly exceeded the allowable limits per minute and for working shift. The employees of the company performed approximately 53.000 movements of small muscules of hand and forearm. The all full-scale limits were exceeded in 20% and 30% Fmax values. The excessive, long-term, unilateral character criteria among seamstress were clearly fulfilled. The left hand was apparently more loaded (especially in the complicated operations) in performing relatively larger spectrum and the range of movements compared with the right hand.

Conclusion: Based of our results the authors objectified a significant exposure to the risk factor of physical load of upper extremities among seamstress of car seat cover sewing industry, which may cause occupational diseases due to the repetitive strain injury of upper extremities. From this reason the criterion for the replacement from the 2nd to the 3rd classification of work within the meaning of Decree of the Ministry of Health of the Slovak Republic no. 542/2007 Coll. in the given profession in the category of physical load, is adequate.

Keywords:

automotive industry – Kinovea – classification of work – risky work – repetitive strain injury of upper extremities – carpal tunnel syndrome

Zdroje

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