According to reports, thousands of patients die each year because of undetected hypoxemia. In recent years, with the advent of pulse oximeters, blood oxygen saturation has been incorporated into the fifth life feature by the medical community, and many chronic diseases are life-threatening. Patients can use a pulse oximeter to monitor their own oxygen content at home, and grasp the body’s oxygen supply.
By monitoring the blood oxygen saturation, the body’s oxygen supply can be indirectly determined. Blood oxygen saturation (SpO2) is one of the most important data in clinical medicine. Under normal circumstances, the blood oxygen saturation of normal human arterial blood is not less than 98%, and less than 90% is considered to be insufficient oxygen supply, which requires certain attention. There may be hypoxia and tissue hypoxia caused by bronchopneumonia, emphysema, and blood circulation diseases.