Watch blood oxygen is above 96, but 90 times a minute is normal?

Normal. 96% of the blood oxygen saturation is within the normal range, while 90% to 100% of the saturation is within the normal range. Watch blood oxygen is above 96, but 90 times a minute is normal. Oxygen saturation refers to the percentage of hemoglobin combined with oxygen in blood to total hemoglobin, which can reflect the oxygen content in human blood.