Breathing pure oxygen is toxic and it will kill you if you do it for more than just a few shallow breaths.
I see college basketball teams using pure oxygen during games while the players are resting in the bench. They’re still alive with no adverse effects. Knowing this, I think it’s OK to inhale pure oxygen given that your body has a high demand for it and you don’t do it over prolonged periods.
How do you know its 100% pure? Like I said, short periods, like a couple breaths are okay, but anything longer can damage the lungs and cause brain bleeds also. There’s a reason that high alt pilots, divers and high altitude sky divers use a gas mix.
Divers only use a gas mix past a certain depth and they mix oxygen with helium. Otherwise they use pure oxygen. In hospitals, pure oxygen is used often for patients who are having trouble breathing. Your statements are false.[/quote]
This is very untrue. The average diver uses regular compressed air with the same percentage of oxygen and nitrogen as the air we breathe every day. Nitrox does have more oxygen and can allow longer bottom time with less risk of decompression sickness. 36% nitrox is the highest commercially available mix for even the most advanced divers. This means that it is 36% oxygen. Air has 20%. Even technical divers do not use pure oxygen. Nor can our bodies handle it.