Nowadays, life is getting faster and faster, and many people have entered a clear sub-health state. "High pressure" has now become a familiar adjective. Have you valued your blood pressure ? According to the 2021 WHO survey: In the past 30 years, the number of adults with hypertension aged 30-79 has increased from 650 million to 1.28 billion. Nearly half of them do not know that they suffer from hypertension, and their blood pressure health should be worthy of attention. Now that health monitoring has gradually become popular, many people wonder, can smart watch measure blood pressure? What is the monitoring principle? Let’s take a look together below.
Conventional blood pressure measurement method
Currently there are two blood pressure measurement methods on the market:
1. Direct measurement method: sends the long catheter with anticoagulant to percutaneously puncture the catheter to the aorta. The catheter is connected to the pressure sensor to directly display blood pressure, which is an invasive method. It only applies to certain special circumstances, otherwise you have to open a hole every time you test your blood pressure. Well, that's too expensive.
2. Non-invasive measurement method: When measuring blood pressure in , tie an airbag to the upper artery of our arm. When the blood pressure measurement begins, the airbags will gradually inflate until our arteries are flattened, and our blood is in a largely non-flowing state. We use inflating and deflation to test our arterial blood flow and capture our vasoconstrictive blood pressure at one time. Most of the methods are used on the market.
Principle of blood pressure measurement of smart watches
Blood pressure monitoring is one of the directions of future development of smart watches. The application of sensing and algorithm technology has enabled many non-invasive monitoring such as heart rate , blood oxygen , etc. to be realized, and blood pressure monitoring is also gradually developing in this context.
The current bracelet blood pressure measurement is basically done using the PPG sensor or a more advanced bracelet/watch using the PPG+ECG form, and the evaluation blood pressure value is obtained with algorithm technology. Using PPG photovoltaic pulse wave schema, the LED light of the watch is emitted to the skin (generally red light/ infrared light is used to measure blood oxygen, and green light is used to measure heart rate). The similarities and differences reflected by blood, muscles, and bones are reflected, and the light reflected through the skin tissue is accepted by the photosensitive sensor and converted into an electrical signal and then replaced with the blood pressure value through algorithms. It is simply understood that: light-electrical-algorithm-digital signal . Advanced watches combine ECG electrocardiogram monitoring to estimate blood pressure, which will be more accurate than a single PPG.
blood pressure meter monitoring method
Currently, blood pressure instruments use the principle of oscillometry: pressurize the cuff to block the blood flow of the brachial artery, and then slowly decompress the arterial efferential sound and small pressure pulses, which is the same as the cuff pressurization method mentioned above. This method is usually used on specialized blood pressure monitors. Most of the intelligent monitoring of
is based on sensors, optical principles and algorithm technology, and the blood pressure monitoring function of smart watches is the same. Most of this kind of monitoring gives the wearer a reference value, as a way to assist health management, rather than a professional medical diagnosis. Any monitoring device in can only be used as reference data. If there is any abnormality, you must consult a doctor! Do not treat yourself.
Of course, do you think the blood pressure monitoring of smart watches is meaningful? Yes, although it cannot be 100% accurate, it can monitor the user's blood pressure value around the clock, and then form evaluation reports and suggestions, and achieve a certain degree of prevention and adjustment. This is of great significance to the health management of normal people. After all, as mentioned at the beginning, most of the people do not know that they have blood pressure problems. It is also worth noting that when choosing a smart watch for health monitoring, you must choose a brand with technology and strength, such as Huawei , Jiaming, Huami and veepoo smart watches are all good choices.
One point technology, hard work, health wear is developing rapidly now. I believe that in the near future, the blood pressure monitoring function of smart watches will be more accurate and the health monitoring technology will be more powerful.
