A 59-year-old female asked:
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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?

3 doctor answers
Dr. Rada Ivanov
30 years experience Pulmonary Critical Care
Upper 90-ties: Levels in the 80-es are not ok, we prescribe supplemental oxygen usually for levels below 86-88%. Bear in mind that levels at rest are higher and they will drop with exertion and/or sleep. Also if you retain carbon dioxide (copd, sleep apnea), you should not get too much oxygen. Bottom line, see a doctor!
Answered on Jul 26, 2020
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3 thanks
Dr. Wojciech Skrzypiec
35 years experience Pulmonary Critical Care
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.
Answered on Aug 2, 2018
4
4 thanks
Dr. Sue Ferranti
28 years experience Internal Medicine
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.
Answered on Jul 3, 2017
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3 thanks

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A 43-year-old member asked:
Dr. Heidi Fowler
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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.
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A 37-year-old member asked:
Dr. Mazen Kherallah
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Hypoxemia: Oxygen level in the blood should be >90 mmhg, it gets slightly lower with advancing age, any level lower than expected should be investigated.
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Dr. Sanjay Agarwal
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Sats <90%: Oximeter showing <90% or more appropriately pao2 <58 is considered hypoxia and need for o2 supplemental oxygen will be needed.
A 39-year-old member asked:
Dr. Mazen Kherallah
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Low Oxygen: Yes, the red blood cells and hemoglobin increase.
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