Citation

Tu Z, Geng S, Li Y. China Saf. Sci. J. 2020; 30(12): 173-179.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.12.024

PMID

unavailable

Abstract

In order to prevent physiological damage caused by high CO2 level and ensure security of occupants in underground space, their physiological responses to CO2 level were analyzed based on human isolation experiment. A natural isolation experiment was performed with 170 subjects for 12 h in an underground civil air defense project in Suzhou. Changes of their heart rate, blood pressure, blood oxygen saturation, electroencephalogram, electrodermal activity, and electroencephalography were measured at different CO2 levels (0. 1%-1%), and HRV and electrodermal response were analyzed. The results show that there are no significant physiological responses when CO2 concentration is no higher than 0. 7%. When it rises to 0. 85%, subjects' heart rate and HRV decrease obviously while low frequency (LF), high frequency (HF) and rapidly changing components of HRV and diastolic blood pressure all increase significantly. And as it grows to 1%, remarkable skin conductance and skin conductance level are recorded. Furthermore, suppressed alpha wave, increased beta wave and KC(Kolmgorov Complexity) complexity are also observed along with increase of CO2level. © 2020 China Safety Science Journal. All rights reserved.

Language: zh