xplanation:
A: SpO2 is the percentage of oxygenated hemoglobin (HbO2) volume in blood in total hemoglobin (Hb), which is an important physiological parameter of human respiratory circulation.
The reference value of blood oxygen saturation is as follows. The lower the value, the higher the risk is:
Daily activities: generally ≥ 95%
Nighttime sleep: generally ≥ 90%
Need to concern: Less than 90%
Note: The measuring range of the equipment is: 80%-100%