Although high concentration of oxygen can save lives, oxygen poisoning will occur if high concentration of oxygen is inhaled for a long time. Usually, when oxygen therapy is carried out at home, low flow and high concentration methods are mainly used for oxygen therapy, and the oxygen absorption time will not be too long.
With 40% and 60% as the boundary, the oxygen concentration is divided into three grades: low, medium and high. When fio2
Extended data
Under normal circumstances, healthy people are generally not deprived of oxygen, and the oxygen delivered to human tissues always exceeds the oxygen consumption of tissues.
The atmosphere contains about 20% oxygen, which is relatively stable. Air pollution only increases some impurity particles and will not affect the oxygen concentration in the air. Even in densely populated areas, it is enough to meet people's needs.
In addition, for the human body, oxygen can't be stored, and the oxygen carrying capacity of human hemoglobin is limited, so oxygen inhalation can't increase arterial blood oxygen and improve the oxygen output of the brain, and oxygen can only play the role of a placebo. There is no reliable argument to prove that oxygen inhalation has a very obvious health care effect.
It should be emphasized that oxygen inhalation can not improve intelligence, but it is only a "combustion improver" for nourishing sugar in oxidative metabolism. The brain is the organ with the highest oxygen consumption in the body. When doing high-intensity mental work, brain oxygen will increase, but it is very limited. It can be satisfied by self-regulation and increasing blood.
Baidu encyclopedia-oxygen inhalation