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Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

caltech.edu

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Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#51

Aktiia has a product on the market which supposedly already does this https://aktiia.com/uk/ . It is based on an optical method though.

A year or two ago, I interviewed a developer who worked for one of the companies trying to build these types of optical blood pressure sensors. I have high blood pressure so I was keen to learn more. The gist of his message was that even in excellent conditions, it was very inaccurate.

I wonder if things changed by now.

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#52
post #4

As a person who had a hypertensive crisis late last year, nothing boils my blood (yes, a pun, I am fine now) more than how people measure blood pressure incorrectly in doctors offices and even hospitals. There are many different things than can increase a BP measurement above the "baseline" including talking, moving around, not having rested but also just waking up, not being in a supported position, only a single va…

Yeah I was told I had high blood pressure, was about to be put on a bunch of medication and then I decided to get a second opinion. The hospital I went to gave me a 24 hour monitor and it came back I had perfectly fine blood pressure.

Turns was scared of doctors.

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#53
post #39

Earlier quoted context omitted.

I had it too. When I was under stress, sometimes I could hear my pulse in my ears like a whooshing sound. I stopped drinking and my BP is now completely normal, and RHR is low 40's. Sleep is much better too.

Are you serious? Your RHR is in the low 40s? Mine is typically 58-65 and I was told I have bradycardia!

Yes, and it was in the 50-60 range when I was drinking. My smartwatch use over a couple years has been informative.

It's a combination of genetics and athletics.

Edit: my smartwatch readings include sleep. Sitting upright at a table right now it's around 65

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#54
post #25

This believe this blood pressure watch has been approved in a few European countries. It requires you to calibrate against the normal approach every month. I think they are trying to get it approved in the US by next year. https://aktiia.com/

I wonder how do you calibrate it in practice.

They include a blood pressure cuff with the watch.

https://aktiia.com/uk/blood-pressure-monitor

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#55
I have reverse white coat hypertension: having a health professional care about me reduces my BP appreciably when they measure it. Placebos work very well on me, if delivered by an obvious competent authority like a nurse practitioner or GP.

I still take the hypertension meds: it's cheaper than paying somebody that highly trained to be nice to me.

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#56
post #4

As a person who had a hypertensive crisis late last year, nothing boils my blood (yes, a pun, I am fine now) more than how people measure blood pressure incorrectly in doctors offices and even hospitals. There are many different things than can increase a BP measurement above the "baseline" including talking, moving around, not having rested but also just waking up, not being in a supported position, only a single va…

I'm a resident physician and I deny having my BP taken in outpatient clinics. The techniques used are ridiculously inappropriate: "Ok, Mr. So-and-so, come with me." calls the nurse, as the pt who is irritated for having to wait 30 minutes quickly gets up to walk along unknown hallways, while rushing to finish a phone conversation, stressed and not knowing where to turn next..."Ok, now we're going to weigh you on this…

> That's why the most appropriate way nowadays is to measure it at home, and keep a BP log.

"Oh yea those machines are junk and totally wrong"

And/or "WHY DO YOU TAKE YOUR OWN BLOOD PRESSURE?!" followed by accusations of being a hypochondriac.

Also the log is junk because I don't know how to properly take the blood pressure. Unlike the assistant who is also doing it wrong.

lolololol

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#57
post #26

Earlier quoted context omitted.

It's frustrating. I usually bike to the doctor's office, and every time I warn them that they're going to get a systolic 10 higher than if they'll wait until the end of the appointment. They don't wait. The tech-taken entry gets put in the EMR. The doctor takes my BP again at the end, says "oh, great" and that reading gets ignored. :p As a sibling comment noted, I ended up deciding to just watch my BP at home every n…

However, as discovered during a family heart crisis, medical professionals will routinely ignore any kind of heart rate or blood pressure readings that you take at home. In my experience, it's not until they see the same measurement during the ($$$) ambulance ride that they take it seriously.

It really really depends on the office and their practices. I visited (and later brought my mom) to a cardiologist who is a terrible doctor, but his office does instruct you to log your blood pressure and then they review the logs. So at least they do that right.

What they do wrong: Queuing up 10 patients at a time, seeing like 60 a day, and then jumping from room to room like a kid with a bad case of ADHD. Dude told the assistant to give my mom 1 bp medicine, rushed out to another patient, and then rushed back 2 minutes later "no, give her this one instead!"

I can't trust that LOL. Our primary doctor got mad at me for taking my mom there and called the cardiologist a "f-ing a-hole" because he had a bad experience with his aunt going there LOL.

Honestly I ... I won't be going back, but I don't hate the dude. He's generally spot-on, even if he's rushed and his medicine advice is sketchy.

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#58
post #25

This believe this blood pressure watch has been approved in a few European countries. It requires you to calibrate against the normal approach every month. I think they are trying to get it approved in the US by next year. https://aktiia.com/

They’ve just received approval for a monitor that needs no calibration at all, although it’s not commercially available yet, and will probably take another half a decade to reach the US.

https://aktiia.com/uk/regulatory-approval-no-need-for-calibr...

Psst… the bracelet is available in the US if you use a UK freight forwarder, & download the app from the EU app store…

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#59
post #57

Earlier quoted context omitted.

However, as discovered during a family heart crisis, medical professionals will routinely ignore any kind of heart rate or blood pressure readings that you take at home. In my experience, it's not until they see the same measurement during the ($$$) ambulance ride that they take it seriously.

It really really depends on the office and their practices. I visited (and later brought my mom) to a cardiologist who is a terrible doctor, but his office does instruct you to log your blood pressure and then they review the logs. So at least they do that right. What they do wrong: Queuing up 10 patients at a time, seeing like 60 a day, and then jumping from room to room like a kid with a bad case of ADHD. Dude told…

My primary care recommended taking my BP at home periodically and even wanted to calibrate my home system against the office system. I do tend to test higher in the doctor's office but I still periodically take it at home.

Re: Caltech Develops First Noninvasive Method to Continually Measure Blood Pressure

#60

Aktiia has a product on the market which supposedly already does this https://aktiia.com/uk/ . It is based on an optical method though.

The Aktiia bracelet takes measurements automatically but not continuously. It produces about 1 measurement point every hour.
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