Is it 100% pure oxygen or what percentage of oxygen is given to the patient? Why do I need a small paper of several hundred words? Dear brothers and sisters.

Because 100% pure oxygen can poison people!

As early as the middle of19th century, British scientist Paul Burt first discovered that if animals breathe pure oxygen, it will cause poisoning, and so will humans. If people are exposed to pure oxygen with a concentration exceeding 0.05MPa (half atmospheric pressure), it is toxic to all cells. If the inhalation time is too long, "oxygen poisoning" may occur. The capillary barrier of the lung is destroyed, which leads to pulmonary edema, pulmonary congestion and bleeding, which seriously affects the respiratory function and further makes the inflator lack oxygen. In the pure oxygen environment of 0. 1 MPa( 1 atmospheric pressure), people can only survive for 24 hours, and pneumonia will occur, which will eventually lead to respiratory failure and suffocation. People who stay in the high-pressure pure oxygen environment of 0.2 MPa(2 atmospheres) for at most 1.5 hours -2 hours will cause brain poisoning, disordered life rhythm, mental disorder and memory loss. If 0.3 MPa(3 atmospheres) or even higher oxygen is added, people will experience brain cell degeneration and necrosis, convulsion and coma within a few minutes, leading to death.

In addition, excessive oxygen inhalation will also promote life aging. Oxygen entering the human body reacts with oxidase in cells to generate hydrogen peroxide, which in turn becomes lipofuscin. This lipofuscin is a harmful substance that accelerates cell aging, accumulates in myocardium, ages myocardial cells and reduces heart function. Accumulation on the wall of blood vessels leads to aging and hardening of blood vessels; Accumulate in the liver and weaken liver function; Accumulate in the brain, causing mental decline and memory decline, and people become dementia; Accumulate on the skin and form senile plaques.