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Experimental observation of influence of inhalating different concentrations of co_(2) on ventilatory function of the lungs

Chen Zhicun, Zhang Listun, Zhou Dianmin, Zhang Hengtai

Institute of Space Medico-Engineering

Abstract

Experiments were carried out on 10 healthy young subjects for observation of influence of inhalating 0.5-7% CO_(2) on the ventilatory function of the lungs. Respiratory rate, tidal volume, minute volume, alveolar Pco_(2) and the ventilatory sensitivity to CO_(2) were correlated with the concentration of CO_(2) in the inspired air. After CO_(2) inhalation, the output of CO_(2) expired decreased. It returned to the control level within 3-5 min, provided the concentration of CO_(2) in the inspired air was not more than 5%. According to the characteristics and patterns of human response to CO_(2) innaiauon, a suggestion of tnree compensatory areas was maae.

Key words: Carbon dioxide;Pulmonary ventilation;Alveolar P_(CO_(2));CO_(2) output;Compensatory area

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Citing This Article：

Chen Zhicun, Zhang Listun, Zhou Dianmin, Zhang Hengtai. Experimental observation of influence of inhalating different concentrations of co_(2) on ventilatory function of the lungs. Acta Physiol Sin 1985; 37 (1): (in Chinese with English abstract).