Tech Friday: A new feature update for my Fitbit Versa

Posted By on September 18, 2020

FitbitSpO2200916_mAfter a recent update from Fitbit, my Versa watch is now tracking my SpO2 level when I sleep. Unsure what to make of it, I asked my doctor-daughter Katelyn what it means: “looks good, no sleep apnea.” (Fitbit devices measure this while sleeping, since they are usually the lowest)

After a little reading on SpO2 levels, it is not exactly what I was thinking. SpO2 is also known as oxygen saturation. It is a measure of the amount of oxygen-carrying hemoglobin in the blood relative to the amount of hemoglobin not carrying oxygen. If it  low, the blood will not function as efficiently which is know as “Hypoxemia.”

Hypoxemia is determined by measuring the oxygen level in a blood sample taken from an artery (arterial blood gas). It can also be estimated by measuring the oxygen saturation of your blood using a pulse oximeter — a small device that clips to your finger.

Normal arterial oxygen is approximately 75 to 100 millimeters of mercury (mm Hg). Values under 60 mm Hg usually indicate the need for supplemental oxygen. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low.

MayoClinic

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