Volume 1, Number 1 (Journal of Occupational Hygiene Engineering, Spring 2014)                   johe 2014, 1(1): 8-15 | Back to browse issues page


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Negahban S A R, Aliabadi M, Babayi Mesdaraghi Y, Farhadian M, Jalali M, Kalantari B et al . Investigating the Association between Heat Stress and its Psychological Response to Determine the Optimal Index of Heat Strain. johe. 2014; 1 (1) :8-15
URL: http://johe.umsha.ac.ir/article-1-22-en.html

Msc Student of Occupational Health, Student Research Committee, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran. , m.jalali@umsha.ac.ir
Abstract:   (4023 Views)

  Background & Objectives : Exposure to high temperatures is common among workers in warm environments leading to some undesirable effects . The aim of this study was to examine physiological responses to heat stress to determine the optimal index for direct measurement of physiological strain in workers of hot environments .

  Methods: In this study, 40 workers of melting and casting process were evaluated . Thermal stress was evaluated based on the WBGT index and physiological strain by measuring oral and tympanic temperature , urine temperature , heart rate, and recovery heart rate. Data was analyzed using SPSS v.16 software .

  Results : Heat stress exceeded the national and international recommended limits based on the WBGT index in 80% of cases of workstations . The correlations between heat strains including tympanic temperature, oral temperature, urine temperature, heart rate and heart rate recovery to heat stress index were significant, while tympanic temperature had a stronger association according to simple linear regression (P<0.01, R2=0.78) .

  Conclusion: Tympanic temperature had a stronger correlation with the WBGT index among the investigated indices . Accordingly , tympanic temperature could be a useful indicator compared to other parameters for measuring physiological strain in warm workplaces due to the ease of measurement, noninvasive nature , acceptance by workers , and fast and non- interference in the measurement process .

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Type of Study: Research Article | Subject: Special

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