Doctor insights on:
Blood Oxygen Level Chart
If you live at sea level, and the pulse oximetry machine if functioning normally, your arterial oxygen saturation should be higher than 93%.
If you live at high altitude, the partial pressure of oxygen in the air is lower and, depending on how high you are, an oxygen saturation level of 93% may be normal. ...Read more
Not really: If it is a nonsmoker, then no, should be 95%+ as "normal." lower can indicate lung infection or function abnormality. Smokers or persons with lung diseases often have lower saturations like this. If no explanation, should see dr for exam and probably chest xray ; breathing treatment (s). ...Read more
Depends: On your age and condition. It is usually reported by%. For example a little baby you would want to be high, close to 100% and if sick not lower than 92% when ill and hospitalized. A normal person walking around is usually 96- 100%. If a person has a chronic lung condition lower percentages of oxygen are acceptable, down to about 88%. ...Read more
Ambient air is about: 21% o2, and healthy lungs produce a po2 of 80-100%. Babies in nicu's treated with 100% due to respiratory immaturity could get pulmonarty and retro lentar fibrosis. One does not do well with higher levels of o2. Like goldylocks, not too little, not too much: just right. ...Read more
It seems whenever I exercise, the blood oxygen level drops. Will it get better if I exercise regularly?
What is normal levels of oxygen in the blood? What is considered low and what is considered dangerous? Is levels in the 80s ok?
It is low: If you are asking about oxygen saturation the level should be above 90%. Normally it it is 97 - 99%. If the levels are in the low 80s - the person should be on oxygen. The oxygen saturation is obtained via external device placed on the finger or earlobe. If you obtain arterial blood and measure oxygen level - po2 the level in 80 is ok. ...Read more
96% or higher: Normal is 96% or above on room air ...Read more
Oxygen in blood: The oxygen in your blood is linked to the concentration of red cells in your blood. If you are anemic, that is what is going to limit your oxygenation, not how much you exercise. Being healthier may improve your anemia. If you exercise more, you may signal your body to tell your bone marrow to make more blood. ...Read more
Low blood oxygen levels, at what number would be low enough to cause a person to fall to the floor and have a blackout?
Depends: Its the rate of fall that's more important than the actual number. When the partial pressure of oxygen falls below 55 or 88% hemoglobin saturation the delivery of oxygen to our organs begins to decrease. If your organs, like the heart, is already damaged this drop can be very dangerous. If the organs are healthy they can tolerate this drop in oxygen levels for several minutes, sometimes even longe. ...Read more
When does low blood oxygen levels result in a coma? (I know it is under 74 because I was still sort of awake then although I suspect not much under.)
Well this varies:
This varies a bit from person to person, so there is not really a number. It sounds like you are talking about the pulse oximetry reading, right? This is not used to generate concern about a coma. The pulse ox reading varies and is somewhat inaccurate.
For most people, having insufficient oxygen for over 5 minutes results in brain damage, which may cause a coma. ...Read more
Lung disease: Is the commonest reason for a low level of oxygen in the blood. It can also happen in heart disease if the heart is failing and fluid builds up in otherwise-healthy lungs, or if there is a hole in the heart, causing blood to bypass the right heart circulation into the lungs and skip picking up oxygen there. These are examples of some common causes. Smoking, high altitude=examples of lung reasons. ...Read more