If you are talking about the pulse oximetry level (device is usually clipped to a person's finger or ear lobe), 100% is as good as it gets! That is perfect.
Good
No, 20% oxygen is the normal atmospheric level.
When determining the blood oxygen level, doctors look for levels in the normal range. A normal arterial blood oxygen level is generally between 75 and 100 mmHg.
A blood level showing 63 percent oxygen is a very low reading. It indicates that the person has some type of breathing problem or interference with blood oxygenation.
yes
If you are speaking in terms of blood oxygen saturation, then no, life is not sustainable at this level. Normal adult blood oxygen saturation is 96%-100% The air around us contains 21% oxygen at sea level. So speaking in terms of 63% oxygen in the air then survival would not be a problem as this would be triple the amount you currently breathe.
What is the best oxygen sat level for fighting lung cancer?
A normal blood oxygen level should be 90 or above (90-99). Any level below 89 qualifies you for oxygen. 74 is low and it means your brain and body are not getting enough oxygen. You should be evaluated by a pulmonologist and you should be on oxygen.
90
Normal oxygen saturation levels vary slightly depending on age and activity. A blood oxygen level of less than 90 percent is considered abnormal. The organs in the body need a continuous supply of oxygen to function properly. If oxygen saturation levels in the body become too low, various problems can develop. When oxygen saturation is too low it is called Hypoxemia.
There is no "normal" oxygen level in COPD. Anything below 90% would be seen and COPD.
The normal partial pressure of oxygen in arterial blood is 75-100 millimeters of mercury. In comparison the partial pressure of oxygen at sea level is 750 millimeters of mercury.
It means 66% of the hemoglobin molecules are oxygenated. This is a very low reading for arterial blood -- not compatible with life (for a human) for more than a few minutes -- though it might be seen in venous blood. Normal arterial oxygen saturation percentage is in the 90s.