The quality of a sphygmomanometer's metrological performance directly affects the accuracy of measurements and is closely related to people's health and safety. Every user hopes to have an accurate and error-free sphygmomanometer to serve them. Only by conducting periodic metrological verification on the sphygmomanometer in use can its accuracy and reliability be ensured. Below, we will explain a few points that should be noted during the use of sphygmomanometers.