How to calibrate an electronic sphygmomanometer

Many people with high blood pressure have some questions about the accuracy of electronic sphygmomanometers, and are not quite sure if their measurements are accurate when measuring blood pressure. At this point, people can use blood pressure quasi quickly calibrate the accuracy of electronic sphygmomanometer, find their own measurement deviation, so as to measure the blood pressure. So, how to calibrate an electronic sphygmomanometer?

First of all, the electronic sphygmomanometer utilizes modern technology for blood pressure measurement of medical equipment, and most patients with high blood pressure have a spare at home. Electronic sphygmomanometer arm, wrist points; its technology has experienced the most primitive first generation, the second generation (semi-automatic sphygmomanometer), the third generation (smart sphygmomanometer) development. Electronic sphygmomanometer has become the main tool for family self-measurement of blood pressure. Electronic sphygmomanometers are also increasingly used in hospitals and other medical institutions.

Hospitals use sphygmomanometers every year in the Quality Supervision Bureau to carry out a test and calibration, home sphygmomanometers are recommended to use the upper arm type electronic sphygmomanometer, because the wrist type is at the end of the artery, farther away from the heart, the measurement of the accuracy is reduced, in addition, home sphygmomanometers are similarly recommended to carry out a calibration every year.

Medical mercury column sphygmomanometer used to determine whether the electronic sphygmomanometer is accurate, the procedure is as follows: first use the mercury column sphygmomanometer to measure blood pressure. After a 3-minute break, measure the blood pressure for the second time with the electronic sphygmomanometer. Then rest for another 3 minutes and measure for the 3rd time with the mercury column sphygmomanometer. The difference between the average of the first and third measurements, compared with the second measurement with the electronic sphygmomanometer, should generally be less than 5 mm Hg.

In addition, wrist-type electronic sphygmomanometers are not suitable for the elderly, because their blood pressure itself is already high, and blood viscosity is high, the results of such sphygmomanometers and the heart itself pumped blood pressure compared to the blood pressure has been reduced by a lot, and the results of this measurement has no reference value.

What kinds of sphygmomanometers are on the market?

1. Barometer (spring) type sphygmomanometers.

The use of pneumatic pump operation pressure measurement, small size, easy to carry, and no mercury leakage shortcomings, but with the increase in the number of applications, it will be due to changes in the spring properties and affect the accuracy of the results, so it needs to be regularly calibrated with the standard mercury column sphygmomanometer.

2, the traditional mercury column (mercury column) type sphygmomanometer.

There are two types of sphygmomanometers: desktop and vertical, and the vertical sphygmomanometer can be adjusted to any height. Because the results are reliable and most commonly used, but the volume is slightly large, inconvenient to carry, and carry the process is easy to make the mercury leakage and affect the accuracy, so each measurement must be checked before the scale tube mercury convex surface is exactly in the zero position of the scale, after the pressure measurement is completed the sphygmomanometer tilted to the right side of the 45-degree switch will be turned off, so as to avoid mercury leakage.

3, electronic sphygmomanometer.

Electronic sphygmomanometer is the use of electronic pressure, beat sensor (instead of stethoscope) to identify the pressure and beat signals, and expressed in digital form, the upper part of the screen for the systolic blood pressure, the lower part of the diastolic blood pressure and pulse rate. Its advantages are easy to operate, intuitive readings, just press a button will automatically carry out the measurement, suitable for home use. However, electronic sphygmomanometers also have the disadvantage of a high rate of error, and often need to be calibrated against a standard mercury column sphygmomanometer.

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