The influence of occupational heat exposure on cognitive performance and blood level of stress hormones: a field study report

Mazlomi, Adel; Golbabaei, Farideh; Dehghan, Somayeh Farhang; Abbasinia, Marzieh; Khani, Somayeh Mahmoud; Ansari, Mohammad; Hosseini, Mostafa

doi:10.1080/10803548.2016.1251137

Cited by 56 publications

(55 citation statements)

References 33 publications

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“…It is estimated that approximately 5–10 million workers in the USA may be exposed to unsafe heat stress conditions (Arbury et al , ; Asghari et al , 2017). Heat stress can also adversely affect the physical and mental performance of workers in such a way as to the increase the rate of occupational accidents (Hajizadeh et al , ; Mazlomi et al , ).…”

Section: Introductionmentioning

confidence: 99%

Thermal comfort and heat stress indices for outdoor occupations over 15 years: a case study from Iran

Ghalhari

Dehghan

Shakeri

et al. 2019

Weather

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The present study aims to assess seasonal trends in thermal comfort and heat stress indices for outdoor occupations over a 15‐year period using the Iranian Meteorological Organization's database for Sari, Iran. Hourly and daily meteorological data including temperature, wind speed, cloudiness, relative humidity and vapor pressure measurements for Sari city from 2000 to 2014 are used. The wet‐bulb globe temperature (WBGT) and universal thermal climate index (UTCI) are calculated, along with thermal comfort indices including physiological equivalent temperature (PET), standard effective temperature (SET) and predicted mean vote (PMV). The highest and lowest mean monthly air temperature values for the 15‐year period were recorded for August (27.55 ± 0.57°C) and January (7.9 ± 0.68°C), respectively. The highest and lowest mean monthly relative humidity values were observed for December (81.2 ± 2.6%) and August (73.7 ± 1.94%), respectively. The strongest correlations were found between all of the thermal comfort and heat stress indices under study and air temperature (r = 0.97–0.99; P < 0.001), as well as all indices and mean radiant temperature (r = 0.96–0.98; P < 0.001). Strong significant correlations were observed between all heat stress and thermal comfort indices (r > 0.93; P < 0.001). The use of meteorological data can enable the prediction of physiologically stressful conditions via knowledge of the strong positive correlation between heat stress and certain physiological indices, as highlighted in this study.

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Section: Introductionmentioning

confidence: 99%

Thermal comfort and heat stress indices for outdoor occupations over 15 years: a case study from Iran

Ghalhari

Dehghan

Shakeri

et al. 2019

Weather

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“…Of these injuries, the most common precipitating event was falls (48%), whereas in the full dataset, falls accounted for 34% of injuries. Research investigating potential mechanisms of the relationship between heat and traumatic injuries has focused on decrements in balance [related to extreme muscle fatigue (58) and exercise in hot conditions (32)] and cognitive performance (28,29), including vigilance, and conditions characterized by heat stress. These changes could plausibly increase the risk of falls, for example from heights.…”

Section: Discussionmentioning

confidence: 99%

“…The mechanisms through which heat may contribute to the risk of a traumatic injury are still under investigation. Research in exercise, human physiology, and occupational settings report heat-related changes in cognitive performance (27,28) and psychomotor vigilance (29) -critical functions that, when impaired, have been documented to compromise balance, mental status, and response time after exercise or in conditions of hyperthermia (29)(30)(31)(32). These factors have in turn been linked to injury risk in occupational settings (6,27,33).…”

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confidence: 99%

A case-crossover study of heat exposure and injury risk among outdoor construction workers in Washington State

Calkins

Bonauto²,

Hajat³

et al. 2019

Scand J Work Environ Health

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We report methods for using high resolution meteorological data to assess the risk of adverse occupational heat health outcomes and provide insight into construction industry-specific occupational and individual risk factors for heat-related traumatic injuries. The results of this study suggest the need for heat-related injury prevention interventions and awareness at lower heat exposures than have previously been recommended.

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“…Many investigations have examined the effects of freezing and thawing on samples [16, 17]. The effects of temperature on human hormones have also been investigated in vitro [18, 19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Centrifuge Temperature on Routine Coagulation Tests

2018

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Background: This study investigated the effects of cooled and standard centrifuges on the results of coagulation tests to examine the effects of centrifugation temperature. Methods: Equal-volume blood samples from each patient were collected at the same time intervals and subjected to standard (25°C) and cooled centrifugation (2–4°C). Subsequently, the prothrombin time (PT), international normalized ratio (INR), activated partial thromboplastin time (aPTT), fibrinogen, and D-dimer values were determined in runs with the same lot numbers in the same coagulation device using the Dia-PT R (PT and INR), Dia-PTT-liquid (aPTT), Dia-FIB (fibrinogen), and Dia-D-dimer kits, respectively. Results: The study enrolled 771 participants. The PT was significantly (p < 0.018) higher in participants on anticoagulant therapy. The respective median values of the test parameters determined using the standard and cooled centrifuges were as follows: PT 10.30 versus 10.50 s; PT (INR) 1.04 versus 1.09 s; APTT 28.90 versus 29.40 s; fibrinogen 321.5 versus 322.1 mg/dL; and D-dimer 179.5 versus 168.7 µg FEU/mL. There were significant differences (p < 0.001) in the parameters between the values obtained with the standard and cooled centrifuges. Conclusions: Centrifuge temperature can have a significant effect on the results of coagulation tests. However, broad and specific disease-based studies are needed.

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The influence of occupational heat exposure on cognitive performance and blood level of stress hormones: a field study report

Abstract: Heat stress can lead to an increase in the blood level of stress hormones, resulting in cognitive performance impairment.

Cited by 56 publications

References 33 publications

Thermal comfort and heat stress indices for outdoor occupations over 15 years: a case study from Iran

Thermal comfort and heat stress indices for outdoor occupations over 15 years: a case study from Iran

A case-crossover study of heat exposure and injury risk among outdoor construction workers in Washington State

Effect of Centrifuge Temperature on Routine Coagulation Tests

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