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The accuracy of electronic sphygmomanometer really puzzles many people. Although there are many popular articles on the Internet discussing this issue, including many doctors, many people still have questions. Still considering which sphygmomanometer to choose.
Electronic sphygmomanometer is the general trend. Is electronic sphygmomanometer accurate in the end?
Although the world is recommending electronic sphygmomanometer, people are still thinking:How accurate is the electronic sphygmomanometer? In principle, the electronic sphygmomanometer is accurate in measuring blood pressure. But the reality is that many people use electronic sphygmomanometer to measure blood pressure is not accurate. Why?
1、 Equipment not qualified
The quality level of electronic sphygmomanometer is uneven, so it is recommended to use electronic sphygmomanometer certified by international standards. Authoritative international organization standards include the European Hypertension Society（ESH）American Medical Device Promotion Enterprise Association（AAMI）And the British Hypertension Association（BHS）As long as we analyze one of the important standards for certification, we can purchase with confidence.
It should be noted that certification is only applicable to a specific product of the enterprise, not the entire brand. Therefore, everyone is buying an electronic sphygmomanometer, and what needs to be confirmed is the certification results of specific products.How to query the certification of electronic sphygmomanometer? If it's online shopping, the simplest way is to ask customer service or visit online stores/Official website product introduction; If you go to a physical store, you can directly ask the salesperson or read the product manual. In addition, you can also call the manufacturer's phone number for consultation.
2、 Unsuitable type
There are several types of electronic sphygmomanometer, mainly finger type, wrist type and upper arm type. The electronic finger sphygmomanometer has the lowest accuracy and is not recommended to purchase. The electronic wrist sphygmomanometer is relatively accurate and suitable for young people and healthy people. The electronic upper arm sphygmomanometer has the highest accuracy and is the first choice for patients with peripheral circulation diseases such as diabetes, hyperlipidemia and atherosclerosis. In general, it is recommended to purchase the upper arm electronic sphygmomanometer directly.
3、 Long term uncalibration
Electronic sphygmomanometer and mercury sphygmomanometer should be calibrated regularly, and the calibration cycle is generally half a year. The core component of electronic sphygmomanometer is the pressure sensor, whose performance has the characteristics of drift with time. If not verified for a long time, it may indicate inaccuracy and pose significant risks, requiring regular testing.
4、 Improper operation
If the issues with these devices are ruled out, inaccurate blood pressure values are likely related to actual improper operation. Once a customer bought an electronic sphygmomanometer in the store. When he went home to measure and control his blood pressure, he found that there was a big difference between the measured value and that of the hospital, and asked for a refund. It turned out that his measurement method was incorrect, and the cuff was too tightly tied, causing the patient's blood pressure to be low. The correct use of upper arm electronic sphygmomanometer is as follows:
oneRelax your body and wear cuffs. Do not engage in drastic changes in exercise before measurement, and do not drink coffee, tea, cola, alcohol or other beverages for a long time, or consume stimulating foods such as chili peppers and onions; Choose a quiet place and tie the cuff to the upper side of the patient's elbow joint1-2At the centimeter point, it is advisable to insert the cuff tightly enough to fit one of the fingers. If it is too loose, it may affect the occurrence of high blood pressure values, while if it is too tight, it may lead to low blood pressure control values.
two。 Press the start button to automatically measure. When measuring, you can choose to sit or lie down, with the palm facing upwards, so that the palms, elbows, and chest are on the same horizontal line;Maintain complete silence, relax the body, breathe evenly, do not speak, and do not move the body randomly.
three。 Read the value and record the value. At the end of the measurement, the measured values are displayed on the LCD screen, recorded, and compared with previous measurements. Some electronic sphygmomanometer can store a variety of readings to facilitate blood pressure monitoring.
In a word, the accuracy of qualified electronic sphygmomanometer is very high, but we must master the correct measurement and research methods to avoid errors.