Measurement of blood oxygen saturation lying down and standing can be, generally take a comfortable position, the commonly used clinical methods to measure blood oxygen saturation are blood collection and blood oxygen saturation meter. 1. Blood collection: Generally take a sitting or lying position, collect arterial blood, measure the blood oxygen concentration and partial pressure of oxygen in the arterial blood, so as to calculate the blood oxygen saturation. 2. Oxygen saturation meter: generally take a sitting position, keep calm breathing, and try not to have pressure on the clamped part of the hand, in order to prevent affecting the blood circulation, resulting in inaccurate oxygen saturation measurement value. Due to the simple operation of the oximetry meter, it is now more commonly used in clinical practice. If the blood oxygen saturation is abnormal, timely measures should be taken to treat it. If you feel unwell, it is recommended to go to the hospital for treatment.