First, what kind of sphygmomanometer is good?
Experts recommend using mercury sphygmomanometer. We usually say that the unit of blood pressure is millimeter mercury, so using mercury column is the most direct measurement method. His advantage is that he is accurate; The disadvantage is that it is inconvenient to carry, and it is difficult for patients to test with mercury by themselves, so they should be tested with the help of their families. Moreover, it is convenient to use and does not require professional training.
Electronic sphygmomanometer is produced by different manufacturers, and its function is to simulate mercury sphygmomanometer. Moreover, some manufacturers of electronic sphygmomanometers have passed the quality inspection of national standards, and some have not passed the quality inspection of national standards, or this batch is compared with mercury sphygmomanometers, and the other batch is not compared with mercury sphygmomanometers.
Therefore, the products on the market are uneven and difficult to compare. The difference between qualified electronic sphygmomanometer and mercury sphygmomanometer should not exceed 5 mm Hg.
During the live demonstration of blood pressure measurement on the road to health, the guests were measured with wrist electronic sphygmomanometer, arm electronic sphygmomanometer and mercury mercury sphygmomanometer respectively. The test results of wrist electronic sphygmomanometer are high pressure 97 and low pressure 58; The test results of arm electronic sphygmomanometer 2 showed that the blood pressure was 1 12, and the low pressure was 65; Mercury mercury column test results show that hypertension is 102 and hypotension is 68. Electronic sphygmomanometer is very different from mercury column. According to experts, 102/68 is the closest to the real blood pressure of the guests, while the low pressure of wrist electronic sphygmomanometer and the high pressure of arm electronic sphygmomanometer are different from the low pressure and high pressure of mercury by10mmhg respectively. If the electronic sphygmomanometer is judged to be unqualified at the same time.
Expert introduction: Mercury sphygmomanometer will be missed every day for various reasons. When mercury is insufficient, the measured blood pressure will be low, so take the sphygmomanometer to the hospital or special quality inspection department for adjustment every year, or buy it back and ask the seller what to do.
Second, what kind of sphygmomanometer is accurate
1. How accurate is the sphygmomanometer? Manual is more accurate than automatic, and cuffs are more accurate than wrists.
Common sphygmomanometers in the market are divided into mercury sphygmomanometers and electronic sphygmomanometers. Mercury sphygmomanometers are common in hospitals, and most sphygmomanometers at home are electronic. Although electronic sphygmomanometers have entered the homes of ordinary people, hospitals still use mercury sphygmomanometers. The reason is not that hospitals can't afford electronic sphygmomanometers, but that the measurement results of mercury sphygmomanometers are more accurate.
Mercury sphygmomanometer needs to be measured with a stethoscope, and others can judge the readings of systolic blood pressure and diastolic blood pressure, so many patients or their families feel that the process of measuring blood pressure with mercury sphygmomanometer is more complicated. In fact, the mercury sphygmomanometer looks very complicated, but it is actually very simple. If there are hypertensive patients at home who need to monitor their blood pressure for a long time, their families may wish to learn how to use mercury sphygmomanometer.
Compared with mercury sphygmomanometer, electronic sphygmomanometer is easy to operate, and can measure blood pressure by itself, without the help of others to tie the cuff, and read with a stethoscope. Therefore, electronic sphygmomanometer has become the main tool to monitor blood pressure at home. Electronic sphygmomanometer can be divided into arm and wrist. Generally speaking, the measurement results of arm type are more accurate and the error is smaller than that of wrist type.
2. Electronic sphygmomanometer: Test several times to reduce random error.
Measuring the quality of an electronic sphygmomanometer depends on whether there are random errors and systematic errors in the measurement results.
In a similar time, the blood pressure measured by the same instrument may be different, which is called random error. Random error is an important basis to reflect the quality of electronic sphygmomanometer. A good instrument can measure blood pressure several times in a row, and the difference will not be too big. If the results are very different, it means that the random error of the instrument is too big to buy. In order to reduce the random error, people can measure blood pressure several times at home, write down the values and take the average value, and the average value will be closer to the real blood pressure value.
Electronic sphygmomanometer may have systematic error besides random error. Systematic error means that the blood pressure measured by sphygmomanometer is higher or lower than the accurate value. For example, a person's actual blood pressure at a certain moment is 120/80mmHg, but the results of repeated measurements by the instrument are all 125/85mmHg, indicating that there is a systematic error of 5mmHg in this instrument. For systematic error, people can't see it when they buy it. They can take the sphygmomanometer to the hospital and compare it with the blood pressure measured by the hospital to see if there is systematic error.
The above is the kind of sphygmomanometer that Bian Xiao introduced to you, which is good and accurate. I hope I can help you. For more information about what kind of sphygmomanometer is good, please continue to pay attention to the decoration of Tuba Rabbit.
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