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2. Oxygen saturation (medicine) - Wikipedia

   en.wikipedia.org/wiki/Oxygen_saturation_(medicine)

   Normal arterial blood oxygen saturation levels in humans are 96–100 percent. [1] If the level is below 90 percent, it is considered low and called hypoxemia . [ 2 ] Arterial blood oxygen levels below 80 percent may compromise organ function, such as the brain and heart, and should be promptly addressed.

3. Hypopnea - Wikipedia

   en.wikipedia.org/wiki/Hypopnea

   Hypopnea during sleep is classed as a sleep disorder. With moderate to severe hypopnea, sleep is disturbed such that patients may get a full night's sleep but still not feel rested. The disruption in breathing causes a drop in blood oxygen level, which may in turn disrupt the stages of sleep.

4. Hypoxemia - Wikipedia

   en.wikipedia.org/wiki/Hypoxemia

   While there is general agreement that an arterial blood gas measurement which shows that the partial pressure of oxygen is lower than normal constitutes hypoxemia, [5] [6] [7] there is less agreement concerning whether the oxygen content of blood is relevant in determining hypoxemia.

5. Normal Pulse Oximetry Ranges and How to Take a Reading - AOL

   www.aol.com/lifestyle/normal-pulse-oximetry...

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6. What Is a Normal Oxygen Level and How Can I Check Mine? - AOL

   www.aol.com/normal-oxygen-level-check-mine...

   To date, Dr. Uppal says he’s overseen the treatment of more than 300 Covid-19 patients, all with varying levels of blood oxygen. What is a good oxygen level? “Normal people who have working ...

7. Apnea–hypopnea index - Wikipedia

   en.wikipedia.org/wiki/Apnea–hypopnea_index

   Combining AHI and oxygen desaturation gives an overall sleep apnea severity score that evaluates both the number of sleep breathing disruptions and the degree of oxygen desaturation (low oxygen level in the blood) during said disruptions. The AHI is calculated by dividing the number of apnea events by the number of hours of sleep.