The measurement method is to select automatic pressurization or semi-automatic pressurization. Before buying a blood pressure monitor, consider whether you can master the semi-automatic pressurization method. ① automatic machine press a button can be automatically pressurized. Fully automatic is the automatic control into the air. ② Semi-automatic is manual pressurization (squeezing the rubber ball with your hand to pressurize). Manual is more troublesome, mainly because the air intake is not well controlled, and the pulse rate of the test is inaccurate when the air is less.

Electronic sphygmomanometer choose arm or wrist type. When purchasing a sphygmomanometer, consider the situation of the user. ① For the general population, arm type or wrist type can be used, and wrist type is convenient for measurement. ②Most middle-aged and elderly people (patients with diabetes, hyperlipidemia, hypertension, etc.) use the arm type. For those patients with high blood viscosity and poor microcirculation, compared with the results measured by the mercury column sphygmomanometer, The error of blood pressure measurement of the wrist and fingers will be very large. National hypertension guidelines unanimously recommend an upper arm electronic sphygmomanometer certified by international standards.

1, because of the relationship between blood flow, usually left hand and right hand measured by the blood pressure will be some differences; usually the left hand blood pressure value will be slightly higher than the right hand, but the difference in 10~20mmHg are normal, however, should be recorded with high measurement data. If the difference between the two hands is more than 40~50mmHg, it may be a vascular obstruction problem, it is best to consult a doctor to find out the cause.

2. It is not advisable to measure blood pressure only once. You should measure blood pressure several times a day and record it in order to understand the changes of your blood pressure within a day.

3, commercially available sphygmomanometers are mostly electronic, and their measurement results are usually slightly higher than traditional mercury sphygmomanometers. The electronic sphygmomanometer is divided into wrist type and arm type. Although the wrist type is more convenient to use, the farther away from the heart, the greater the difference in measurement results. It is suggested that the test can be carried out on site when purchasing. If there is little difference between the results measured by arm type and wrist type, both can be used. If the difference is large, it is better to choose the arm type.

4. It is best to measure blood pressure when you are relaxed in your own home. When some people measure blood pressure in a medical institution, they will be nervous in the face of medical staff wearing white clothes, which will cause blood pressure to rise. The medicine is called "white clothes". "Hypertension", measuring blood pressure at home can overcome this situation.

5. The traditional mercury sphygmomanometer will be affected by thermal expansion and contraction, and should be corrected to zero once every six months on average.