Safety and Health at Work

Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency (산업안전보건연구원)
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Comparison of the Impact of an Optimized Ice Cooling Vest and a Paraffin Cooling Vest on Physiological and Perceptual Strain

  • zare, Mansoor (Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences) ;
  • dehghan, Habibollah (Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences) ;
  • yazdanirad, Saeid (School of Health, Shahrekord University of Medical Sciences) ;
  • khoshakhlagh, Amir hossein (Department of Occupational Health Engineering, School of Health, Tehran University of Medical Sciences)
  • Received : 2018.09.10
  • Accepted : 2019.01.14
  • Published : 2019.06.30
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Abstract

Background: Ice cooling vests can cause tissue damage and have no flexibility. Therefore, these two undesirable properties of ice cooling vest were optimized, and the present study was aimed to compare the impact of the optimized ice cooling vest and a commercial paraffin cooling vest on physiological and perceptual strain under controlled conditions. Methods: For optimizing, hydrogel was used to increase the flexibility and a layer of the ethylene vinyl acetate foam was placed into the inside layer of packs to prevent tissue damage. Then, 15 men with an optimized ice cooling vest, with a commercial paraffin cooling vest, and without a cooling vest performed tests including exercise on a treadmill (speed of 2.8 km/hr and slope of %0) under hot ($40^{\circ}C$) and dry (40 %) condition for 60 min. The physiological strain index and skin temperature were measured every 5 and 15 minutes, respectively. The heat strain score index and perceptual strain index were also assessed every 15 minutes. Results: The mean values of the physiological and perceptual indices differed significantly between exercise with and without cooling vests (P < 0.05). However, the difference of the mean values of the indices except the value of the skin temperature during the exercises with the commercial paraffin cooling vest and the optimized ice cooling vest was not significant (P > 0.05). Conclusions: The optimized ice cooling vest was as effective as the commercial paraffin cooling vest to control the thermal strain. However, ice has a greater latent heat and less production cost.

Keywords

References

  1. Mohammadyan M, Sepehr P. Design of cool spot and assessment of its effect on WBGT index among furnace workers' position in Shimi Madani industry in Hamadan. J Mazandaran Uni Med Sci 2010;20(76):2-7.
  2. Dehghan H, Mortazavi SB, Jafari MJ, Maracy MR. Combination of wet bulb globe temperature and heart rate in hot climatic conditions: the practical guidance for a better estimation of the heat strain. Int J Environ Health Eng 2012;1(1):18-26. https://doi.org/10.4103/2277-9183.96006
  3. Jalil M, Sani MA, Dor Z, Yahya MS, Mohideen Batcha MF, Hasnan K. Heat stress investigation on laundry workers. presented at: the International Conference on Ergonomics. Malaysia: Kuala Lumpur; 2007.
  4. Castleman BI, Ziem GE. American conference of governmental industrial hygienists: low threshold of credibility. Am J Ind Med 1994;26(1):133-43. https://doi.org/10.1002/ajim.4700260112
  5. Holmer I, Kuklane K, Gao C. Test of firefighter's turnout gear in hot and humid air exposure. Int J Occup Saf Ergon 2006;12(3):297-305. https://doi.org/10.1080/10803548.2006.11076689
  6. Moran DS, Epstein Y. Evaluation of the environmental stress index (ESI) for hot/dry and hot/wet climates. Indust Health 2006;44(3):399-403. https://doi.org/10.2486/indhealth.44.399
  7. Wan M. Occupational exposure to hot environments: Florida workers need help. Fla Public Health Rev 2004;1:53-5.
  8. Nishihara N, Tanabe S-i, Hayama H, Komatsu M. A cooling vest for working comfortably in a moderately hot environment. J Physiol Anthropol Appl Hum Sci 2002;21(1):75-82. https://doi.org/10.2114/jpa.21.75
  9. Jette F-X, Dionne J-P, Rose J, Makris A. Effect of thermal manikin surface temperature on the performance of personal cooling systems. Eur J Appl Physiol 2004;92(6):669-72. https://doi.org/10.1007/s00421-004-1112-7
  10. Bendkowska W, Klonowska M, Kopias K, Bogdan A. Thermal manikin evaluation of PCM cooling vests. Fibres Textiles East Eur 2010;78(1):70-4.
  11. Konz S. Personal cooling garments-a review. ASHRAE Trans 1984;90:499-517.
  12. Yazdanirad S, Dehghan H. Designing of the cooling vest from paraffin compounds and evaluation of its impact under laboratory hot conditions. Int J Prev Med 2016;7(1):47-54. https://doi.org/10.4103/2008-7802.177890
  13. Lu Z, Yao Q. Energy analysis of silicon solar cell modules based on an optical model for arbitrary layers. Sol Energy 2007;81(5):636-47. https://doi.org/10.1016/j.solener.2006.08.014
  14. Gardner JW, Kark JA, Karnei K, et al. Risk factors predicting exertional heat illness in male Marine Corps recruits. Med Sci Sports Exerc 1996;28(8):939-44. https://doi.org/10.1097/00005768-199608000-00001
  15. Bennett BL, Hagan RD, Huey K, Minson C, Cain D. Comparison of two cool vests on heat-strain reduction while wearing a firefighting ensemble. Eur J Appl Physiol Occup Physiol 1995;70(4):322-8. https://doi.org/10.1007/BF00865029
  16. Moran DS, Shitzer A, Pandolf KB. A physiological strain index to evaluate heat stress. Am J Physiol Regul Integr Comp Physiol 1998;275(1):129-34. https://doi.org/10.1152/ajpregu.1998.275.1.R129
  17. Moran D, Horowitz M, Meiri U, Laor A, Pandolf K. The physiological strain index applied to heat-stressed rats. J Appl Physiol 1999;86(3):895-901. https://doi.org/10.1152/jappl.1999.86.3.895
  18. Dehghan H, Mortzavi SB, Jafari MJ, Maracy MR. Development and validation of a questionnaire for preliminary assessment of heat stress at workplace. J Res Health Sci 2015;15(3):175-81.
  19. Dehghan H, Sartang AG. Validation of perceptual strain index to evaluate the thermal strain in experimental hot conditions. Int J Prev Med 2015;6:11-8. https://doi.org/10.4103/2008-7802.151817
  20. Jovanovic D, Karkalic R, Zeba S, Pavlovic M, Radakovic SS. Physiological tolerance to uncompensated heat stress in soldiers: effects of various types of body cooling systems. Vojnosanitetski Pregled 2014;71(3):259-64. https://doi.org/10.2298/VSP120731045J
  21. Mokhtari Yazdi M, Sheikhzadeh M. Personal cooling garments: a review. J Text Inst 2014;105(12):1231-50. https://doi.org/10.1080/00405000.2014.895088
  22. Griffin Jc, Jutzy Kr, Claude Jp, Knutti Jw. Central body temperature as a guide to optimal heart rate. Pacing Clin Electrophysiol 1983;6(2):498-501. https://doi.org/10.1111/j.1540-8159.1983.tb04398.x
  23. Jovanovic DB, Karkalic RM, Tomic LD, Velickovic ZS, Radakovic SS. Efficacy of a novel phase change material for microclimate body cooling. Therm Sci 2014;18(2):657-65. https://doi.org/10.2298/TSCI130216129J
  24. Barr D, Gregson W, Sutton L, Reilly T. A practical cooling strategy for reducing the physiological strain associated with firefighting activity in the heat. Ergon 2009;52(4):413-20. https://doi.org/10.1080/00140130802707675
  25. Mondal S. Phase change materials for smart textiles-An overview. Appl Therm Eng 2008;28(11-12):1536-50. https://doi.org/10.1016/j.applthermaleng.2007.08.009
  26. LuomalaMJ, Oksa J, Salmi JA, et al. Adding a cooling vest during cycling improves performance in warm and humid conditions. J Therm Biol 2012;37(1):47-55. https://doi.org/10.1016/j.jtherbio.2011.10.009
  27. Smolander J, Kuklane K, Gavhed D, Nilsson H, Holmer I. Effectiveness of a light-weight ice-vest for body cooling while wearing fire fighter's protective clothing in the heat. Int J Occup Saf Ergon 2004;10(2):111-7. https://doi.org/10.1080/10803548.2004.11076599

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