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Doctor insights on: Normal Blood Oxygen

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Are low blood oxygen levels normal?

Are low blood oxygen levels normal?

High is good.: Well you would anticipate 95 to 100% oxygen saturation for a young healthy adult. The lower the oxygen saturation the more concern. ...Read more

Dr. Scott Bolhack
3,072 doctors shared insights

Oxygen (Definition)

Oxygen is a gas that the cells in your body need to work properly. The air we breathe normally has 21% oxygen. A maximum of 100% oxygen can be given. Babies with heart or lung problems may need ...Read more


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What is normal levels of oxygen in the blood? What is considered low and what is considered dangerous? Is levels in the 80s ok?

What is normal levels of oxygen in the blood? What is considered low and what is considered dangerous? Is levels in the 80s ok?

Oxygen level....: The oxygen saturation, or pulse oximetry, should be in the 90's normally. Any value of less than 88% on room air qualifies a patient for supplemental oxygen therapy. So, an oxygen saturation in the 80s is not normal. Your doctor will need to find out why your oxygen level is low and provide treatment. ...Read more

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Can you please explain how and why with low iron sometimes not have a normal amount of oxygen in their blood?

Can you please explain how and why with low iron sometimes not have a normal amount of oxygen in their blood?

See explanation: Red blood cell have hemoglobin. Hemoglobin carries oxygen to the tissues. If your iron is low, you may be anemic. Therefore the number of red cells is decreased and not as much oxygen is transported to the tissues. ...Read more

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If you quit smoking how long does it take for the oxygen level in your blood to be normal?

Unknown: Improvement happens quickly (1 hour) but if smoking has damaged your lungs with emphysema or COPD you may never regain totally normal blood oxygen.This not to say i don't want you to quit-every cig you don't smoke helps you! ...Read more

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For blood oxygen saturation level - what is the fatal and normal range?

Oxygen sat curve: If you look at the p50 or oxygen saturation curve, anything above 90% is ok for the hemoglobin to unload as it gets into the tissues and supply them. As the curve goes down to 75% about pao2 of 45, this nears the saturation in the veins where unloading of oxygen to the tissues including heart muscles becomes difficult and there will be eventual death as it gets lower than that. ...Read more

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I'm hospitalized for kidney infection, and on oxygen as blood saturation is around 80, normally 97-99. Could my infection or complications cause this?

I'm hospitalized for kidney infection, and on oxygen as blood saturation is around 80, normally 97-99. Could my infection or complications cause this?

Additional Concern: Are you sure about the diagnosis of a kidney infection. Pulmonary renal syndromes; wegener's gn, goodpastures, cause pulmonary hemorrhage (bleeding) and present with lung disease and kidney failure. Also, 10-20 % of patients with kidney infections seed the blood stream with bacteria and you can develop infections outside of the kidney. Finally, ards, a lung disease can develop in very ill pts. ...Read more

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When I was diagnosed with sleep apnea, the doctor said my blood oxygen level was normal. Do I actually need a cpap?

When I was diagnosed with sleep apnea, the doctor said my blood oxygen level was normal. Do I actually need a cpap?

CPAP: Normal oxygen does not mean that your oxygen saturation did not drop. If you have symptoms of sleep apnea like daytime somnolence, problems concentrating or with memory or irritability or if you have high blood pressure, stroke/tia, coronary artery disease, atrial fibrillation, you have to be treated. Also moderate and severe osa have to be treated, even w/o anything of the above. ...Read more

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