Physiological responses to different CO2 levels in poor ventilation room

Ya Chen Chen, Tzu Chien Hsiao*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

According to ventilation of acceptable indoor air quality (IAQ), the air carbon dioxide concentration (CCO2) and air temperature (Ta) increase with human in poor ventilation. The main source of CO2 pollution indoor is human respiration. This study simulates a poor ventilation condition and 10 volunteers participate with non-mask method to study the physiological responses in three CCO2 levels. Facial temperature (Tf), saturation of percentage oxygen (SpO2), and electrocardiography (HR) were spontaneously acquired while subjects were inside an airtight room. Analytical results indicate SpO2 decreased as CCO2 increased. Those results further demonstrate a positive correlation between CCO2/HR and CCO2/Tf, implying that the central-chemoreflex can stimulate the respiratory system since SpO2 variance and increased HR can promote pulmonary gas exchange. Notably, temperature difference in Tf and Ta increased under low CCO2 and then reversed and stabilized inference the antagonistic pattern accelerated rapidly initially and decelerated finally stabilized. These findings also imply that the internal body responded to changes in the external environment rapidly, attempted to homeostasis, and reached equilibrium slowly. Variations of CCO2 and Ta can be modeled by equations. Results of this study prove that IAQ affects physiological responses in the symbiotic relationship between the human body and surrounding environment.

Original languageEnglish
Title of host publication6th European Conference of the International Federation for Medical and Biological Engineering - MBEC 2014
EditorsIgor Lackovic, Darko Vasic
PublisherSpringer Verlag
Pages423-426
Number of pages4
ISBN (Electronic)9783319111278
DOIs
StatePublished - 1 Jan 2015
Event6th European Conference of the International Federation for Medical and Biological Engineering, MBEC 2014 - Dubrovnik, Croatia
Duration: 7 Sep 201411 Sep 2014

Publication series

NameIFMBE Proceedings
Volume45
ISSN (Print)1680-0737
ISSN (Electronic)1433-9277

Conference

Conference6th European Conference of the International Federation for Medical and Biological Engineering, MBEC 2014
CountryCroatia
CityDubrovnik
Period7/09/1411/09/14

Keywords

  • Carbon dioxide concentration
  • Electrocardiography
  • Facial temperature
  • Indoor air quality
  • Poor ventilation room

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