Samsung says it has discovered An application for blood pressure monitoring for a smartwatch. The solution will be delivered starting with the Galaxy Watch Active2, a Tizen watch that was launched last year. According to Samsung, the app was “released by the South Korean Ministry of Food and Drug Safety (MFDS) as software as a medical device (SaMD), making it a government-approved, over-the-counter, and cuff-free blood pressure monitor.”
The only sensors on the back of a Galaxy Watch Active2 are a photoplethysmography heart rate sensor (PPG) and an electrode for electrocardiograms. However, the company says this is enough to get a blood pressure assessment. The trick is that you first need to calibrate the sensors with a real blood pressure cuff. During the setup process, wear the watch while measuring a blood pressure value with a cuff. Then enter the cuff value in the Samsung software. From there, the software is said to be able to carry out further measurements only with the watch hardware.
Conventional automated blood pressure cuffs are inflated to restrict blood flow in your arm. When the cuff releases the pressure, the arterial pulsations are measured with a pressure sensor. Already there is a smart watch with an inflatable band that is basically a tiny blood pressure cuff – the Omron HeartGuide– But Samsung’s watch doesn’t work that way. Instead, the company says, “The device measures blood pressure through pulse wave analysis that is tracked with the heart rate monitor sensors. The program then analyzes the relationship between the calibration value and the change in blood pressure to determine blood pressure.” It is a PPG controlled blood pressure measurement.
There is actually a whole Natural items on the topic of blood pressure measurement with a PPG sensor. The important thing is that a PPG sensor measures blood volume and not blood pressure. However, the correlation between the two means that after calibration with a real blood pressure measurement to a certain volume, you can measure the volume change and derive a blood pressure reading from it. The disadvantage of this technology is that Samsung has to recalibrate the watch “at least every four weeks” with an additional cuff display for an accurate reading. The company also recommends holding the watch firmly on your wrist and not speaking or moving while reading.
It sounds like the test case for it took place in 2018 when Samsung and UFCS launched the “My BP lab“Research project. The project used the Galaxy S9 PPG sensor to measure blood pressure using the same cuff calibration schedule as today’s announcement of the smartwatch. World settings.”
This feature requires the “Samsung Health Monitor App”, which Samsung said will be available in the third quarter of this year.