How long a person can live with an oxygen saturation level below 90% depends on a number of factors, including the patient’s physical condition and whether the treatment is timely and effective.
Normal oxygen saturation should be more than 94%. When the blood oxygen is lower than 90%, it means that the patient has a lack of oxygen. This is usually caused by severe respiratory diseases such as pneumonia, chronic obstructive pulmonary disease, heart disease such as heart failure, and many other diseases.
If the patient’s basic condition is good and mild, and the patient’s hypoxia is timely taken nasal cannula oxygen, mask high-flow oxygen inhalation and other supportive measures, and at the same time for the primary disease to take rapid and effective therapeutic measures, proper nursing care, etc., the hypoxia can be relieved more quickly, and generally does not pose a threat to life.
If the patient’s condition is extremely serious and combined with more basic diseases, poor physical condition, and the effect of treatment is not good, hypoxia persists, then there is a greater threat to the patient’s life, the patient may successively develop respiratory and circulatory failure and even life-threatening after a few days.
Therefore, it is recommended that if the oxygen saturation level is lower than 90%, the patient should consult a doctor in time to standardize the diagnosis and treatment.