How to choose an electronic sphygmomanometer? There are three ways: look at the brand. Choose a good brand of electronic sphygmomanometer, and the product manual should have the measurement license mark and product production license number issued by the drug supervision and administration department, as well as detailed instructions on the correct use of the product. If you don't know the correct use of the product, it will also affect the correctness of the measurement results. Second, look at the repeatability of the measurement results. According to the correct use method in the product manual, repeat the measurement on normal blood pressure several times to see the average value of the results and the error value of each measurement. If the error is too large, it means that the repeatability of the product is not good. Third, look at the correctness of the measurement results. Compare the results measured by the same person with normal blood pressure with those measured by the hospital to see the error value of the results. If the error is not too big, it can be used as a reference for future measurement.
2. How to use and choose a sphygmomanometer?
With the popularization of medical knowledge, sphygmomanometer is no longer a special instrument in hospitals, and many families begin to buy and use sphygmomanometer. There are three commonly used sphygmomanometers: mercury sphygmomanometer, electronic sphygmomanometer and barometer sphygmomanometer.
Generally speaking, mercury sphygmomanometer has high accuracy and stability. However, due to the need to cooperate with stethoscope for sound monitoring and blood pressure measurement, the technical requirements for users are high. If the technology is not in place and the operation is improper, it is easy to make errors in the measured blood pressure. At present, hospitals mainly use mercury sphygmomanometer.
Electronic sphygmomanometer Electronic sphygmomanometer is light in appearance, easy to carry, easy to operate and clear in display, and can measure heart rate and blood pressure at one time. Generally, it doesn't need much maintenance, just be careful not to break it and get wet, which is more suitable for ordinary families. At present, the electronic sphygmomanometer on the market can be divided into wrist type and arm type according to the measuring position; According to the measurement method, it can be divided into two types: full-automatic and semi-automatic.
3. Can the old sphygmomanometer with stethoscope measure blood pressure by itself?
Measuring blood pressure requires stethoscope and sphygmomanometer. At present, there are three kinds of sphygmomanometers in use: mercury sphygmomanometer, pneumatic sphygmomanometer and electronic sphygmomanometer, among which mercury sphygmomanometer is the most commonly used. During the measurement, the subjects should rest quietly for 5 minutes to eliminate the influence of tension and fatigue on blood pressure. The subject can sit or lie on his back, and his arm should be at the same level as the right atrium (the arm should be at the same level as the fourth costal cartilage when sitting, and the arm should be at the same level as the axillary midline when lying), and the abduction should be 45 degrees. Roll the sleeve under your arm, or take off a sleeve for easy measurement. Before measuring blood pressure, the gas in the cuff of the sphygmomanometer should be released first, and then the cuff should be tied to the upper arm smoothly, neither too loose nor too tight, so as not to affect the accuracy of measurement. The middle part of the balloon faces the brachial artery of the cubital fossa, and the lower edge of the cuff is 2 ~ 3 cm away from the cubital fossa. Turn on the mercury tank switch. Find the pulse of brachial artery with index finger and middle finger. Place the chest radiograph of the stethoscope (i.e. the round head of the stethoscope) on the part where the brachial artery pulsates the strongest, close to the skin, and gently press it with the left hand to fix it. Hold the balloon of the sphygmomanometer in your right hand, close the air valve on the balloon, and inflate the cuff repeatedly until the brachial artery pulsation disappears, then let the mercury column rise by 20 ~ 30mm, and then unscrew the air valve slightly to release the gas in the cuff, so that the mercury column slowly drops at a constant speed. Pay attention to the change of sound and the scale on the mercury column. When you hear the first sound, the milligram indicated by the mercury column is the systolic blood pressure; When the sound suddenly becomes weak, the millimeter indicated by mercury column is diastolic pressure. If you can't hear clearly, let the gas in the cuff drop to zero first, pause for a moment, then repeat the measurement and remember the measured value accurately. After the measurement, the gas in the cuff should be drained, the nut of the air valve should be tightened, the cuff should be untied, the cuff and the balloon should be folded neatly and placed flat in the box, and the mercury tank switch should be turned off to prevent mercury from flowing back. Finally, close the lid of the sphygmomanometer. If you need to observe the changes of blood pressure every day, you should use the same sphygmomanometer to measure the blood pressure of the same arm at the same time and at the same position, so the measured results are more reliable. Patients with better economic conditions can buy the electronic sphygmomanometer currently on the market, which is very convenient to use.