Human experiments of metabolism, blood alkalization and oxygen effect on control and regulation of breathing I: room air exercise test

doi:10.12047/j.cjap.0116.2015.011

Abstract

Abstract: Objective: Under the guidance of the holistic integrative physiology medicine, we reanalyzed the data during symptom-limited maximum cardiopulmonary exercise testing (CPET) in order to investigate control and regulatory mechanism of breathing. Methods: This study investigated 5 normal volunteers who accepted artery catheter, performed CPET room air. Continuous measured pulmonary ventilation parameters and per minute arterial blood gas (ABG) analysis sample parameters during exercise. All CPET and ABGdata changes were standard analyzed and calculated. Results: With gradually increasing power, minute oxygen uptake(every breath oxygen uptake × respiratory rate = O₂paulse × heart rate) and minute ventilation (tidal volume × respiratory rate) showed nearly linear progressive increase during the CPET(compared with the rest stage, P<0.05 ~ 0.001); Minute ventilation increased even more significant after the anaerobic threshold (AT) and respiratory compensation point. PaO₂ was increased at recovery 2 minutes (P<0.05); PaCO₂ was decreased after anaerobic threshold 2 minutes (P<0.05); [H⁺]a was increased from AT (P<0.05), and rapidly raised at last 2 minutes, remained high at recovery. Lactate was increased rapidly from AT (compared with resting,P<0.05);bicarbonate decreased rapidly from AT ( compared with resting,P<0.05) and it's changed direction was contrary to lactic acid. Conclusion: In order to overcome the resistance of the power during exercise, metabolic rate othe body increased, respiratory change depend upon the change metabolism, and the accumulation of acidic products exacerbated respiratory reactions at high intensity exercise.

Key words: cardiopulmonary exercise testing, respiratory response pattern, room air, respiratory rate, tidal volume, minute ventilation

CLC Number:

R332.3

YIN Xi, SUN Xing-guo, STRINGER WW, WANG Gui-zhi, LV Jing, GE Wan-gang, LIU Fang, CI Zheng, WASSERMAN K. Human experiments of metabolism, blood alkalization and oxygen effect on control and regulation of breathing I: room air exercise test[J]. CJAP, 2015, 31(4): 341-347.

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