The significance of oxygen saturation is to indicate the concentration of oxygen in the blood, which is an important physiological parameter of the respiratory cycle, a monitoring indicator of whether the body is hypoxic or not, and of great clinical significance for the oxygenation capacity of the lungs as well as the assessment of the ability of hemoglobin to carry oxygen. Oxygen saturation refers to the percentage of hemoglobin capacity in the blood that has been combined with oxygen over the total hemoglobin capacity, which is simply the blood oxygen content in the blood, and it is a monitoring indicator of whether the body is hypoxic or not, and the normal value is about 98% for the arterial blood and 75% for the venous blood; if the value is less than the normal value, it means that there is a hypoxia in the body, and timely treatment is needed. Real-time monitoring of arterial oxygen saturation can tell the body’s oxygen supply, the function of the lungs and hemoglobin function assessment, if there is a lung disease will lead to oxygenation capacity damage leading to hypoxemia, hemoglobin dysfunction and other saturation will also appear to fall. The monitoring of oxygen saturation is of great clinical significance, and can play a certain role in indicating the progress of the disease and the state of the patient. The patient needs to actively cooperate with the doctor to improve the relevant examinations, and contact the doctor in time to deal with the obvious decrease in oxygen saturation.