Why breathing pure oxygen is harmful for humans?
Manoj It is also called oxygen toxicity syndrome which may occur as a diving disorder, when divers breathe any breathing gas at the high pressure of depth, as a potential complication of mechanical ventilation with pure oxygen, where it is called the respiratory lung syndrome. The problems caused by hyperventilating are due to decreased carbon dioxide within the blood. A perfect partial pressure is important for gas (carbon dioxide and oxygen) diffusion to occur.Venous blood (deoxygenated) coming to our lungs from all over the tissues of our body brings high level of CO2 and low level of O2. That is to say pCO2 is high and pO2 is low in the blood coming from tissue. According to Dalton’s Law each gas in a mixture of gases exerts its own pressure in proportion to its concentration in the mixture. If this imbalance occurs diffusion of gases won’t be possible.
