Blood oxygen measurement of Huawei watch for a while 100 for a while 90.

The blood oxygen measurement of Huawei watches is the normal fluctuation of 100 to 90. Huawei Watch is not a professional instrument for measuring oxygen saturation. It is normal that the fluctuation is larger than that of professional instruments, which plays a monitoring role and cannot replace professional medical diagnosis. The main measurement indexes of oximeter are pulse rate, oxygen saturation and perfusion index (PI). Oxygen saturation is one of the important basic data in clinical medicine. Blood oxygen saturation refers to the percentage of combined oxygen capacity in total blood volume to total combined oxygen capacity.