According to the latest statistics of the "China Cardiovascular Health and Disease Report 2019", the number of hypertension patients in China has reached 245 million, and the number of hypertensive patients under the age of 35 has also exceeded 70 million, coupled with stroke, coronary heart disease, kidney disease and other serious complications including high disability and mortality rates, hypertension, as an inconspicuous chronic disease, is becoming an invisible killer of Chinese health, bringing a heavy burden to families and society.

For the increasingly large number of hypertensive people, electronic sphygmomanometer has become a must-have medical product into tens of millions of families by virtue of its product advantages such as accurate measurement, light appearance, easy operation, and clear display, helping hypertensive patients manage blood pressure more timely and effectively. At present, electronic sphygmomanometers are gradually replacing traditional mercury sphygmomanometers to become the first choice in the market, and in the process of updating and iterating electronic sphygmomanometers, there is one component that has always been retained, which is the pressure sensor.

During an electronic sphygmomanometer measurement, the inflatable cuff is first inflated to allow it to have enough pressure to block the flow of blood through the local aorta. As the pressure is gradually released, the pressure value is measured as the systolic blood pressure of the heart as the blood begins to flow through the arteries, and the rate at which the pulse beats can also be monitored. Continue to deflate slowly so that the pressure inside the cuff gradually decreases, and when the cuff pressure is reduced to equal to or slightly below diastolic blood pressure, blood flow returns to unobstructed flow, at which point the measured value is equivalent to the diastolic blood pressure of the heart. In this way, a complete measurement cycle is completed, in which the pressure sensor plays an important role in numerical perception, and the signal generated by the pressure sensor is conditioned by an operational amplifier or instrumentation amplifier, and then sent to the ADC (analog-to-digital converter), and then the measurement results are displayed on the LCD screen by cooperating with different types of sensors and monitors, using appropriate algorithms.

How electronic blood pressure monitor products work

For the pressure monitoring in the electronic sphygmomanometer, at present, the separated pressure bridge sensor is mostly used to convert the pressure signal into a resistance voltage signal, and it is also necessary to add a complex signal conditioning circuit to amplify it and then carry out analog-to-digital conversion, so there are strict requirements for the accuracy, power consumption, data output, etc. of the pressure sensor, and at the same time, because the electronic sphygmomanometer is a portable instrument at home, the volume and weight of the built-in pressure sensor have also become important parameters of the pressure sensor.

Because when using an electronic sphygmomanometer to measure blood pressure, there is no need for external human intervention, but through the internal technology of the electronic sphygmomanometer, the blood pressure value can be analyzed independently. However, after some users have used it for a period of time, they find that there is a certain error between the electronic sphygmomanometer and the mercury sphygmomanometer, and the measurement results of the electronic sphygmomanometer will be slightly higher than the measurement results of the mercury sphygmomanometer. In fact, after practice, it is found that the measurement error is not a problem with the electronic sphygmomanometer itself, but some wrong operations in the process of use.

The mistakes of using an electronic blood pressure monitor include: 1. The measurement time is different. If you want to measure blood pressure more accurately, you can choose to measure blood pressure between 6 a.m. and 8 a.m. and 4 p.m. to 6 p.m., because according to scientific studies, blood pressure levels are higher at this time. If the blood pressure value at this time does not reach the range of hypertension, then in general it can be concluded that the patient does not have high blood pressure. Of course, if you want to measure your blood pressure every day to observe blood pressure changes, you can actually judge your blood pressure changes by measuring at the same time every day; 2, The measurement method is not accurate. First of all, before the measurement must ensure that the whole body is in a relatively relaxed state, it is best to sit for 10 minutes before the measurement, so that the mood is calm down, and then to measure blood pressure. Secondly, in the process of measuring blood pressure, be sure to pay attention to making the cuff height of the electronic blood pressure monitor flush with your heart, but the bottom of the cuff should be 1 to 2 centimeters higher than the elbow, and pay attention to the tightness of the cuff curl needs to be reserved about a finger width.

With the development of medical science and electronic technology, the future of patient electronic medical record management through electronic sphygmomanometer will become a development trend, by hypertensive patients with electronic sphygmomanometer self-measurement of blood pressure, directly connected to the computer, transmitted through the Internet, doctors obtain relevant medical information after timely guidance of patients for treatment, so this also puts forward higher requirements for the core component of electronic sphygmomanometer pressure sensor. Due to the high reliability, high sensitivity and high precision of the MEMS pressure sensor, it can ensure the accuracy of the data output by the electronic sphygmomanometer, and the power consumption is less, which can prolong the life of the electronic sphygmomanometer.