The following reasons lead to inaccurate measurement of oxygen saturation:
1. The watch is not properly worn, and the sensing area on the back of the device is not in contact with the skin of the wrist, so data cannot be obtained;
2. The sensing area on the back of the watch is dirty, or there is sweat between the wrist and the device, which will affect the measurement result;
3. In low-temperature environments, or when the skin temperature of the wrist is too low, it can lead to reduced blood flow, affecting measurement results;
4. Wearing a watch with the wrist under pressure can impact blood circulation, also resulting in inaccurate measurement results;
5. The presence of wrinkles or pigmentation on the wrist where the watch is worn can interfere with the penetration of sensor light, causing inaccurate measurement results;
6. For a single measurement, it is essential to keep the wrist still during the process, avoiding arm movement or engaging in conversations that lead to emotional excitement.