Advertisement

Effect of Ice Slurry on Suppression and Cooling of Body Temperature in Firefighters

  • Jongjin Jeong
  • Tetsuhito Akieda
  • Masayuki Mizuno
  • Shinya Yanagita
  • Shiro Ichimura
  • Takahiko Yamamoto
  • Yoshifumi OhmiyaEmail author
  • Tsuguo Genkai
  • Haruto Mochida
  • Shun Suzuki
  • Toshiyuki Kugai
Conference paper

Abstract

Firefighters often work in harsh high-temperature and high-humidity environments such as scene of fires. Additionally, the heat and perspiration generated by the human bodies further increase the temperature and humidity inside the fire-protective clothing. The aim of this research is to scientifically evaluate the body load based on vital data from firefighters according to the activities and environment of each firefighter and to further investigate the effect of cooling the human body by fluid intake with the aim of lowering the risk of heatstroke. In a series of experiments, six firefighters took exercise in an environment of 25 and 40 °C as a normal-temperature and a high-temperature condition, respectively. And they took in water or ice slurry before and after exercise. As the experimental result, in case of exercise in the high-temperature environment, intake of ice slurry caused rectal temperature to decrease rapidly compared with intake of water. But in the normal temperature, the cooling effect of rectal temperature by intake of ice slurry showed little difference from ingestion of water. The ear temperature did not show the difference by intake of water and ice slurry both; in addition, after the exercise 1, during rest time with intake of water, the ear temperature decreased to initial temperature at the normal-temperature and high-temperature environment. The trends of cardiac rate looked almost identical between intake of water and ice slurry in each environment for exercise, but after only the exercise 1, intake of ice slurry could decrease cardiac rate to initial condition earlier than intake of water. As a result of this research, ingestion of ice slurry was shown to be effective at reducing the rectal and body surface temperatures during rest after exercise in the high-temperature environment and slowing the heart rate during rest after exercise in both the normal- and the high-temperature environments.

Keywords

Firefighter Vital data Fluid intake Temperature increase suppression and decrease effects 

Nomenclature

Tsurface

Body surface temperature [°C]

Tarm

Body surface temperature of upper arm [°C]

Tchest

Body surface temperature of breast [°C]

Tthigh

Body surface temperature of the femoral region [°C]

Notes

Acknowledgements

We would like to show our greatest appreciation to the six experimental subjects who belong to Tokyo Fire Department. And, we would also like to express our gratitude to Tokyo Fire Department for use of the constant-temperature and constant-humidity room to conduct the experiments.

Reference

  1. 1.
    Roberts, M. F., et al. (1977). Skin blood flow and sweating changes following exercise training and heat acclimation, Frontiers in Physiology. Journal of Applied Physiology, 43(1).CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Jongjin Jeong
    • 1
  • Tetsuhito Akieda
    • 1
  • Masayuki Mizuno
    • 1
  • Shinya Yanagita
    • 1
  • Shiro Ichimura
    • 1
  • Takahiko Yamamoto
    • 1
  • Yoshifumi Ohmiya
    • 1
    Email author
  • Tsuguo Genkai
    • 2
  • Haruto Mochida
    • 2
  • Shun Suzuki
    • 2
  • Toshiyuki Kugai
    • 2
  1. 1.Tokyo University of ScienceChibaJapan
  2. 2.Operational Safety Section, Fire Technology and Safety LaboratoryTokyo Fire DepartmentTokyoJapan

Personalised recommendations