what is spo2

Oxygen saturation (SpO2) is the percentage of oxygen-bound oxygenated hemoglobin (HbO2) in the blood that accounts for the total volume of hemoglobin (Hb, hemoglobin), that is, the concentration of blood oxygen in the blood, which is the respiratory cycle Important physiological parameters. While the functional oxygen saturation is the ratio of HbO2 concentration to HbO2 + Hb concentration, which is different from the percentage of oxygenated hemoglobin. Thus, monitoring arterial oxygen saturation (SaO2) can estimate lung oxygenation and hemoglobin oxygen carrying capacity. Normal human arterial blood oxygen saturation of 98%, 75% of venous blood.

The metabolic process of the human body is the process of biooxidation, and the oxygen required in the metabolic process is through the respiratory system into the human blood, with blood red blood cells in the hemoglobin (Hb), combined with oxygenated hemoglobin (HbO2), and then transported to the human body Part of the tissue cells to go. The ability of blood to carry oxygen is measured by oxygen saturation.