Electronic sphygmomanometer measurement failure may be a sphygmomanometer problem, or human factors or disease factors, both of which may lead to blood pressure measurement failure. 1. Problems with electronic sphygmomanometers: Insufficient power in the sphygmomanometer or malfunctioning of the sphygmomanometer body can lead to failure of blood pressure measurement. 2. Human factors: The cuff may be tied too loosely or too tightly so that the blood pressure measurement fails, the tightness of the cuff should be such that it can be inserted into two fingers. The cuff may be tied so loosely or so tightly that the brachial artery cannot be detected, resulting in a failure of the blood pressure measurement. The cuff should be tied around the upper arm with the lower edge of the cuff 2 to 3 centimeters from the elbow. 3. Disease factors: some cardiac arrhythmias such as atrial fibrillation, because the pulse is irregular, may also lead to failure of blood pressure measurement, this time to use the mercury column sphygmomanometer manual measurement, measurement of the deflation should be slow, can be measured several times. Electronic sphygmomanometer measurement failure is recommended to rule out the electronic sphygmomanometer itself has no fault, and then check the human factor, if necessary, to the hospital by the doctor to give the blood pressure measurement and other checks to rule out disease factors. If there is any discomfort, you should consult a doctor in time.