With the development of modern technology, cuff sphygmomanometers are as accurate as mercury sphygmomanometers. Electronic sphygmomanometers are subject to more disturbing factors, and the error in measuring blood pressure is larger than that of mercury sphygmomanometers. However, if you use the correct measurement method, regular instrumentation, and regular calibration, there will not be much difference between the results of the measurement and those of the mercury sphygmomanometers, so you can use them without any worry. Daily monitoring of blood pressure for hypertensive patients is particularly important, generally speaking, mercury sphygmomanometer is more accurate, the value is also more accurate, but the mercury sphygmomanometer operation is more troublesome, especially for the elderly, therefore, most people will choose electronic or more convenient operation of the electronic sphygmomanometer. Patients with high blood pressure should be treated correctly under the guidance of a doctor and monitor their blood pressure on a daily basis to avoid the adverse consequences of abnormal blood pressure.