Put simply, SpO2 is a measure of blood oxygen saturation. The more oxygen you have in your blood, the higher your SpO2 levels are going to be. Seeing as our bodies need oxygen to survive, we can ...

SpO2 readings were, on average, 0.6-1.5 percentage points higher for patients with darker than lighter skin tone. At both SpO2 thresholds assessed, false negative rates (low oxygen missed by the pulse ...

Following the March 2026 update for Google Pixel Watch devices, a number of users are reporting that their SpO2 (blood oxygen) and skin temperature readings have vanished from the Fitbit app. The ...