Improving effect of plateau oxygen-enriched building environment on oxygen state of short-term Tibet sojourners

The perennial low-pressure and hypoxia in the Qinghai-Tibet Plateau poses a serious threat to the physical health and comfort level of sojourners who build and assist Tibet. In this paper, the quantitative influence of the indoor oxygen environment on human oxygen state in plateau buildings is studied by combining subjective investigation and objective physiological parameter testing. The results show that when the human body is in a hypoxia state, the ambient oxygen concentration is negatively correlated with average arterial pressure and heart rate, and positively correlated with blood oxygen saturation. Increasing ambient oxygen concentration can weaken individual differences in blood oxygen saturation. The four types of symptoms of human brain state, head sensation, autonomic nerve function state and sensory state can be used as effective evaluation indicators to reflect the human oxygen state. The comfort needs of symptoms for oxygen environment are not synchronized. When the ambient oxygen volume fraction is 24.97%, the oxygen sensation improvement rate is 56.04% to 84.13%.