SpO2 stands for Saturation of peripheral oxygen.
In more detail, SpO2 represents the percentage of oxygenated hemoglobin in your blood. Hemoglobin is the protein in red blood cells that carries oxygen. Therefore, SpO2 indicates how much oxygen your blood is carrying relative to its maximum capacity. It is a vital sign that healthcare professionals use to assess respiratory function. A pulse oximeter is typically used to non-invasively measure SpO2.
