Oxygen levels between 70 and 80 can lead to death within a few hours if not treated in a timely manner, but recovery is possible if the patient is treated properly. Oxygen saturation is the percentage of oxygen-bound hemoglobin in the blood as a percentage of the total bound hemoglobin volume, and is an important physiological parameter of the respiratory cycle. In normal people, arterial oxygen saturation is 98%, which may fluctuate depending on the altitude of the place of residence, but should not be lower than 94%. When the oxygen saturation reaches 70%~80%, it is very critical, and the tissue cells are in a state of hypoxia, which cannot meet the needs of normal physiological functions of the human body, and there may be serious consequences such as cardiac arrest, death of brain cell damage and even death by anesthesia. If there is a lack of timely treatment, the patient can die within a day or even within a few hours. However, after active treatment, patients have the possibility of recovery. Hypoxia will have a great impact on the patient’s body, when the blood oxygen saturation reaches 70~80, you need to ask the doctor for rescue treatment as soon as possible to avoid deterioration of the condition and serious consequences.