Electronic sphygmomanometers are gradually entering thousands of households, and sometimes the results measured by electronic sphygmomanometers and mercury column sphygmomanometers will have certain differences, so many people think that electronic sphygmomanometers are not as accurate as mercury sphygmomanometers, which is not the case.
The electronic sphygmomanometer has a high sensitivity, so if the measurement method or posture is incorrect, the cuff slides up and down and rubs against the cuff, the interval between the first and second measurements is too short, and the cuff is not deflated thoroughly, the measurement results may be affected to a certain extent. Therefore, you should follow the instructions in the manual. During measurement, do not talk, do not move your arm or body, and keep the measurement site at the same level as the heart. When continuous measurement is required, the cuff should be loosened and the arm rested for at least 5 minutes before measurement.
In addition, the blood pressure of the human body is constantly changing, and varies with emotional changes as well as after exercise, alcohol, and bathing. Before the measurement, the patient should prepare in advance, keep quiet for 10-20 minutes, relax the body, do not eat, smoke, exercise and eliminate other factors that have an impact on blood pressure half an hour before the measurement. It is recommended to take two measurements and take the average value as the blood pressure value. If there is any abnormality, please go to the hospital in time.