To say that the function that is most frequently requested to be done on the Apple Watch recently should be blood pressure measurement. Although the Samsung Galaxy Watch 4 has a blood pressure measurement function, the commercial version in Taiwan has not been updated and opened (there is a cracked installation on the Internet). Law).

Then at yesterday's winter press conference, Huawei also launched "Watch D", which can measure blood pressure and electrocardiogram, and advertised that it can screen for arteriosclerosis and the risk of irregular heart rate, and advertised that it has been clinically verified by many hospitals in mainland China.

Sphygmomanometer is a medical device. To apply for sales qualification, it is still unclear whether it will be introduced or not. Let's take it as it first. Let's see how others do it...

The Huawei Watch D looks a bit tough, with a 1.64-inch AMOLED screen with a long surface and an aluminum alloy case. It weighs 40.9g without the strap. The official specification states that the average battery life is seven days. The watch also supports IP68 dust and water resistance. Compatible with Hongmeng OS2, Android 6 and iOS12 or above.

In addition to assistant, general exercise, and health measurement, BP5068A24, Watch D focuses more on cardiovascular status monitoring, including blood pressure measurement, ECG acquisition, all-day blood oxygen detection, temperature, sleep, etc.

Watch D collects these data through a variety of sensors, including six-axis sensor, PPG optical heart rate sensor, temperature sensor, differential pressure shadow driver, ECG acquisition sensor...etc.

In terms of blood pressure, it is pressurized by a micro air pump on the watch. On the other hand, it is also inflated with a double-layered narrow air bag on the watch strap, so that the watch fits the arm to measure the pulse fluctuation change to measure the blood pressure value. It seems to be the oscillometric measurement used by general electronic sphygmomanometers.

The air pump can measure the highest blood pressure of 230mmHg, and the pressure range is 300mmHg. The watch has a pressure sensor, a pressure feedback control circuit, a low-flow air circuit, etc., to adjust the accuracy of the air pump pressurization. It is advertised that the error can be controlled within plus or minus 3mmHg.

The strap is also fixed with a butterfly buckle to make the pressurization process more stable. Because of these airbag designs, the watch is thicker and the strap is wide.

The watch will detect whether the measurement posture is correct to guide you. After collecting the data, it will be converted into diastolic blood pressure and systolic blood pressure data with the HUAWEI TruBP blood pressure measurement algorithm, which will be recorded as a trend for a long time. remind.

In addition to blood pressure, Watch D also supports ECG measurement, sleep breathing monitoring, etc., comprehensive cardiovascular monitoring data, the program will check whether the user is at risk of arteriosclerosis and irregular heart rate, and provide recommendations.

But the biggest question should be accuracy. Will it be a more professional test after this?

Although it is mentioned that there are many hospitals for clinical verification, each person's posture and environment are different when measuring, and some people's poor circulation will definitely affect the measurement accuracy, and Huawei also mentioned on the official website that it cannot be measured. As a result, self-diagnosis, that is, this is reference data, a reminder data, and in the end, it is still based on doctor's orders. (Personally, I think it is more accurate to go to a health check and follow up)