For the medical term hypertension, many people have cognitive misunderstandings, thinking that it will occur more in the middle-aged and elderly population, far away from young people. This is not the case, and data show that the number of people with hypertension aged 30-79 years has increased from 650 million to 1.28 billion in the past 30 years. Worse, nearly half of them don't realize they're one of them.
This is precisely where high blood pressure is most harmful. Unlike colds, hypertension onset is relatively slow, there is no obvious change in early physical characteristics, even if symptoms such as dizziness and palpitations appear, it is difficult to think of high blood pressure. But in fact, many seemingly independent diseases are complications of hypertension, and if left unchecked for a long time, many organs such as the heart and kidneys will have problems.
Theoretically, if you want to detect abnormalities in time, you can only check 24 hours a day. But life still has to go on, and you can't stay in the hospital every day. Giving smart wearable devices health monitoring capabilities is the best solution at present, does not require too much additional time and expenditure, and is convenient to use at ordinary times, and key physical indicators can be learned anytime and anywhere.
Previously, Huawei's smart wearable devices have been able to achieve continuous heart rate monitoring, ECG collection, blood oxygen measurement, sleep monitoring, body temperature detection, heart health research, stress testing and other functions. The new Huawei Watch D not only retains all of the above features, but also adds the ability to independently measure blood pressure, which is the most comprehensive health monitoring capability of all wearable devices.
How to build a "wrist" sphygmomanometer
As we all know, there are two kinds of sphygmomanometers commonly used in the family, one is a mercury sphygmomanometer, which needs to be combined with the stethoscope to assist subjective judgment, and there is a certain threshold for getting started; the other is a relatively simple operation of the arm electronic sphygmomanometer, but no matter which type of sphygmomanometer above, it is not convenient to carry around, and there is no way to provide measurement services at any time.
The advantage of Huawei Watch D is that its product form and conventional smart watches are not much different, the space and time requirements are very low, usually can be worn directly on the wrist, anytime and anywhere can measure blood pressure, it will not look strange.
In fact, there are some smart watches on the market that have announced support for blood pressure detection, but there is a fundamental difference between them and Huawei Watch D. Most of the smart watches with blood pressure detection functions before need to be used together with professional sphygmomanometers, which is equivalent to data acquisition or with the help of third-party devices, and Huawei Watch D is fully equipped with independent measurement capabilities.
In principle, Huawei Watch D is actually the same as many arm-type electronic sphygmomanometers, which is also an oscilloscope method, which needs to be used as a pressure transmission medium through the airbag, and the contact area between the airbag and the test site will directly affect the test accuracy, so the external airbags of conventional electronic sphygmomanometers are relatively large. However, the same way huawei watch D and watch wear, determines that its structural design will be very difficult.
On the one hand, we have to find a way to put the airbag on the watch in a way that does not affect the wearing comfort and aesthetics; on the other hand, we also need to consider how to plug a powerful air pump into the extremely limited internal space to drive the airbag to work normally. The clever point of Huawei Watch D is to place the airbag on the inside of the strap, which solves the problems we mentioned above.
Or for the sake of wearing comfort and aesthetic considerations, Huawei uses a special narrow airbag design on this product. It may not be possible to see directly with the naked eye, in fact, it is a double-layer airbag structure, and the fit between the airbag and the skin after bulging up and the compression that can be provided are good, which can improve the measurement accuracy to a certain extent.
Once the airbag is done, it's time for the air pump. Huawei Watch D has a built-in miniature air pump with an area the same size as a dime coin, although it is small, the quality is great. Officially, its pressurization range can reach 300mmHg, and the maximum high blood pressure supported by measurement has reached 230mmHg, which is consistent with the measurement range of traditional blood pressure monitors.
Since the air bag will give the strap an outward force during the pressurization process, if the conventional silicone strap is used, it is easy to have obvious deformation, reducing the measurement accuracy. Therefore, Huawei Watch D adopts a sandwich tensile strap with built-in polymer tensile material, as well as a special forged stainless steel butterfly stud buckle, which can avoid the impact of repeated adjustment of the length of the strap on the tightness.
In addition, huawei watch D uses a 0.01mmHg high resolution pressure sensor and low flow resistance path design. Officials said that the error of this pressure measurement system is controlled within ±3mmHg, which has reached the medical level. Based on the 128Hz real-time feedback pressure control, it can also adjust the inflation flow according to the feedback pressure in time to achieve low jitter linear boost, which is also helpful for improving measurement accuracy.
Of course, in the matter of improving the accuracy of measurements, a major advantage of smart devices is that they can reduce the impact of individual differences on blood pressure measurements through algorithmic optimization. However, because the human blood pressure situation is affected by many factors such as age and gender, it is certainly not enough to use only one set of algorithms, so Huawei has made multiple sets of algorithm models for this product.
During the measurement process, the system classifies the population according to the current pulse wave signal characteristics, and automatically matches the algorithm model that is most suitable for the current user to improve the accuracy of blood pressure measurement.
How about using it?
Above we roughly talked about huawei is now the sphygmomanometer "loaded" into the watch, the following specific to talk about, how to actually use. Just like many regular smartwatches, the Huawei Watch D's packaging list includes two sets of M and L straps/airbags of different sizes, except that it has an additional measuring ruler.
As we mentioned earlier, the accuracy of blood pressure measurement data and the fit between the airbag and the test site have a lot to do with each other, so before officially using the Huawei Watch D, we must first use the accompanying ruler to measure the wrist circumference, and then select the appropriate strap and airbag on this basis, and select the corresponding size setting in the device. Both the airbag and the strap support quick release, making it easier to operate.
Considering the accuracy of data measurement, the actual use of the process to pay a little attention to the wearing position, it is recommended to put the watch body in the middle of the back side of the wrist, the edge of the body below the root of the ulna stem process (the part where the wrist protrudes), can not press the root of the ulna phlasposa, but also should not be too far away, so that the center of the dial and the wrist and palm stripes to maintain two finger width.
The things we need to pay attention to when measuring blood pressure are also applicable when measuring with huawei Watch D. It is recommended to sit quietly for a period of time (more than 5 minutes) before the measurement, and to keep quiet during the measurement and avoid talking. In addition, because it is used differently from other sphygmomanometers, the measurement arm needs to maintain a stable posture, can not clench fists and compress the chest, so that the device and heart are as flat as possible.
In terms of health, Huawei's strength is not only good at helping users reduce the difficulty of obtaining physical data through hardware innovation, but also in the extension of data applications. Friends who know Huawei smart watches should know that Huawei has previously launched a heart health study with 301 Hospital to help users conduct heart health screening based on the heart rate monitoring capabilities of Huawei watches.
This time also brought the blood pressure health research, which was initiated by the China Medical Promotion Association, jointly participated by 301 Hospital, Guangdong Provincial People's Hospital, Wuhan Asian Heart Hospital, etc., based on the blood pressure measurement ability of Huawei Watch D, which can achieve sensorless blood pressure trend and ambulatory blood pressure monitoring.
The function of non-inductive blood pressure trend is actually the application of non-inductive blood pressure trend monitoring technology to continuously detect blood pressure. There are two benefits, one is that the device can screen out abnormal blood pressure rhythms according to the records, helping users identify the risk of cardiovascular disease; the other is that when the body is under high pressure during the day, the watch will prompt the user to actively measure blood pressure in time to improve blood pressure management awareness.
Ambulatory blood pressure monitoring is a micro-pump measurement technology, which measures blood pressure regularly to record changes in blood pressure levels throughout the day. When this feature is turned on, the watch reminds the user to measure blood pressure every 30 minutes when not sleeping, and automatically measures every 45 minutes when sleeping. This relatively accurate blood pressure measurement data is very helpful for screening for occult hypertension.
In addition to the above we mentioned, you can also develop a scientific blood pressure management plan in the Huawei sports health app; based on the daily blood pressure health management punch card, the device will generate a blood pressure management health weekly report; and when you have concerns about your health data, you can directly ask for help from the doctor through the app, this kind of convenience service similar to the integrated health platform, at this stage it is difficult for you to experience on other brands of devices.
More comprehensive health monitoring capabilities
The biggest highlight of huawei watch D is that it can measure blood pressure, but obviously, you can't directly call it a "sphygmomanometer". From the naming rules, it is easy to know that Huawei still classifies this product into the category of smart watches, but the positioning is different from the other series that exist, and it emphasizes more powerful and comprehensive health monitoring capabilities.
The best way to reflect this view is that it supports ECG collection. As we all know, in the past, if the smart watch supported the ECG function, the ECG suffix was directly added to the name, but Huawei Watch D did not do so. In a way, ECG has become the default function here, just like heart rate monitoring.
The functions and services that Huawei ECG watches have been able to achieve before can be provided by Huawei Watch D. It can collect ECG signals, and after the measurement is completed, you can choose to save the ECG report locally or send it to a doctor for interpretation, or you can get a detailed report through the paid ECG interpretation service provided by the National Telemedicine and Internet Medical Center.
The body temperature measurement function introduced on the Huawei Watch GT3 also appeared on the Huawei Watch D. It has a built-in high-precision temperature sensor, and health management based on body temperature, and a new "body temperature" card has been added to the sports health app for easy viewing.
In addition to the above, other Huawei smartwatch features such as blood oxygen measurement, heart rate monitoring, stress monitoring, sleep quality detection, sleep apnea risk screening, etc., you can experience on the Huawei Watch D. In addition to being good enough for health monitoring, the phone's motor features are just as great.
Huawei has stuffed a high-precision GNSS positioning chip into its fuselage, which includes running, cycling, jump rope, elliptical machine, rowing machine, etc., more than 70 sports modes, and common sports types are basically included. In addition, the phone also supports 6 daily movement intelligent recognition, enough to meet the normal use needs of most people.
In terms of intelligent experience, Huawei Watch D also supports the use of Alipay for mobile payment, bus/access control cards, remote control photography and other functions, but compared to other Huawei smart watches, its application store is not so rich, mainly some applications with high practicality. Of course, the watch market is as rich as ever, so don't worry about that.
In wearable devices, the epitome of health monitoring capabilities
In fact, a long time ago, Huawei has made it clear that it must take the path of sports health, no matter which product series, it has the ability to not lose the sports health of competitors at the same price. However, there is still a clear tendency between each product series, such as the digital series emphasizing a comprehensive intelligent experience, intelligence, health monitoring capabilities, and motor functions go hand in hand.
As represented by the GT3 released some time ago, the GT series tends to be athletic. In this way, it is equivalent to the direction of health without a more representative product line. The arrival of Huawei Watch D just fills this "gap". Later, when choosing a Huawei smart watch, it may make you less entangled, and you can enter the seat according to the point number you pay more attention to.
Huawei Watch D is very easy to summarize, after the introduction of blood pressure measurement function, it has a more comprehensive and powerful health monitoring capabilities than all other smart watches on the market. And because it retains some of the sporty functions and playability that we think smart watches should have, and has a 7-day long battery life, there is no problem in using it as a normal smart watch.
If you just want to get a smartwatch with relatively better health monitoring capabilities, Huawei Watch D is one of the best choices. But if you want to buy a smartwatch that can measure blood pressure independently, it is the only option on the market at present.
This article was originally published by Geek Park GeekPark, please add Geek Jun (ID: geekparker).