[Samsung Galaxy Watch 4] Kruelll:
Hi All! Especially @Dante63 who it seems may be able to actually find a working solution for Watch4. I just wanted to come back to the topic of automatic/regular/continuous blood pressure measurements, given how hugely important this topic is. There are hundreds of millions of people worldwide with elevated/high blood pressure and I’m sure thousands of Watch4 owners who would be happy to pay maybe 20 bucks, maybe more (I would pay more) for a working solution/app for automatic BP measurement on Watch4. You see, manual BP measurement on a watch doesn’t cut it: 1) people with elevated BP already have a traditional cuff at home and the problem is they hardly ever measure their BP because they simply forget – and having a watch that can measure it in a manual process that takes a similar amount of time does not make any change here (and no one is using it on the go), and 2) BP tends to fluctuate throughout the day, so even if they do measure it at least once per day, it does not truly reflect their actual BP levels. That’s why automatic/regular/continuous BP measurement is the holy grail here – not only because, well, it’s automatic but also because it can average out the readings over time. Currently, there is only one CE-certified PPG-based continuous BP tracker, the Swiss wristband called Aktiia. This is the device we should mimic here. They just raised 17 mln USD because of their “unique” approach, just look them up. The thing is, Watch4 has better-quality sensors than Aktiia and similar BP algorithms, the only difference is that Aktiia uses the built-in accelerometer to assess whether the wearer is moving (no measurements taken) or still, either sitting or lying. Yes, lying/sleeping, which – contrary to the comment above – is actually the best time to take measurements using such a PPG-based method (see the latest research on Aktiia in Nature https://www.nature.com/articles/s41598-021-99294-w ) By the way, HRV is best measured (most telling) in deep sleep and it is probably the case also for BP.

It is not about taking 100s of BP measurements per day – according to this review (https://gadgetsandwearables.com/2021/04/10/aktiia-bracelet-review/), “on average the bracelet would take 9-10 measurements per day” but that’s already a game changer vs manual measurements. Of course, “readings can be viewed and charted on a daily, weekly and monthly basis” – that would be great to have as well.

All in all: Aktiia is charging GBP 199 per annum and you can put them out of business by simply enabling automatic readings on Watch4 whenever the person wearing it is idle for a few minutes, based on the built-in accelerometer. That person does not need to be sitting in the exact same position like in a traditional cuff-based measurement – lying/sleeping works great, too, for example. Yes, it could attempt to take the reading dozens/hundreds of times per day, that’s OK, key is to take a few automatic readings per day. Yes, body_sensors permission would be needed, or simply filtering out BP readings of zero or super low.

Could it be done perhaps with AutoWear/Tasker?

https://www.reddit.com/r/tasker/comments/pwgc3d

Amazfit management knows that their PumpBeats is not good enough if it’s just for manual BP measurement, they already announced they will need to introduce continuous monitoring https://www.myhealthyapple.com/amaz...ssure-measurement-along-with-a-new-processor/ Huawei may also introduce it in their Watch D. But Watch4 is likely the better device for the task.

Let me know your thoughts.

Cheers

Kruel