Electronic sphygmomanometer measurement is accurate, but it is recommended that patients should preferably choose brachial type electronic sphygmomanometer, wrist type sphygmomanometer, that is, electronic sphygmomanometer measuring radial artery, is relatively less accurate than the electronic sphygmomanometer measuring brachial artery. At present, electronic sphygmomanometers have been strongly promoted by the state, because the mercury sphygmomanometers commonly used in the past, there is pollution to the environment, and there is a certain amount of variability in the measurement of each person, and sometimes if the sphygmomanometer is not reasonably closed, it will lead to the outflow of mercury, which will affect the accuracy of the next measurement, electronic sphygmomanometers are more convenient to measure, the elderly are also easy to operate. So at present, no matter in the clinic, or the actual use of patients, electronic blood pressure monitor are strongly promoted, in fact, electronic blood pressure monitor is also very accurate.