Basic functions of pulse oximeter

In addition to heart rate, blood pressure, respiratory rate and temperature, pulse oximetry (PO) is considered to be the fifth most critical health indicator. Hemoglobin (Hb) is an important part of blood cells. It is responsible for transporting oxygen from the lungs to other tissues in the body. The amount of oxygen contained in hemoglobin at any one time is called oxygen saturation. The oxygen saturation is expressed as a percentage, which is the ratio of the oxygen content of hemoglobin to the oxygen-carrying capacity of hemoglobin. Blood oxygen saturation is an important physiological parameter that reflects whether the human body's respiratory function and oxygen content is normal. It is an important physiological parameter that shows whether our human tissues are healthy. Severe hypoxia can directly lead to tragedies such as suffocation, shock, and death. In developed countries such as Europe and the United States, people attach great importance to the monitoring of blood oxygen, and the oximeter has a very high penetration rate.