What does blood oxygen saturation mean?

Under normal circumstances, blood oxygen saturation refers to the proportion of oxygenated hemoglobin in the total hemoglobin within the blood. A detailed analysis is as follows:

Blood oxygen saturation is an important physiological parameter that reflects the percentage of oxygenated hemoglobin in the total hemoglobin in the blood, indicating the concentration of oxygen in the blood. Blood oxygen saturation can be categorized into arterial oxygen saturation, venous oxygen saturation, and transcutaneous oxygen saturation measured by non-invasive devices. The normal range for arterial oxygen saturation is typically 95%-100%, whereas the normal range for venous oxygen saturation is relatively lower, at 65%-88%.

Measurement of blood oxygen saturation is usually performed using non-invasive devices such as pulse oximeters. These devices utilize finger clip-type optical sensors that measure the absorption of specific wavelengths of light by hemoglobin in the finger, calculating the proportion of oxygenated hemoglobin in the blood. When blood oxygen saturation falls below the normal range, it may indicate hypoxia in the body, which could be caused by factors such as lung or heart diseases.

In daily life, consuming foods rich in iron and vitamin C, such as lean meats, eggs, and fresh fruits and vegetables, may help enhance the oxygen-carrying capacity of blood, thus contributing to maintaining normal blood oxygen saturation levels.