whats is the spo2 value means health

1, Oxygen saturation is generally more than 95% of normal people.Normal SpO2 values vary between 95 and 100%.

2. General oxygen saturation of less than 90% are more dangerous situation.

3. However, some elderly people, especially in patients with lung disease, sleep apnea syndrome and other diseases, there may be a phenomenon of low oxygen saturation, is due to long-term hypoxia caused by tolerance.