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Cuffless device delivers clinically accurate blood pressure measurements

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Re: Cuffless device delivers clinically accurate blood pressure measurements

#21

Post by blhack »

DoofusOfDeath wrote: post #10
blhack wrote: post #8

There is a conference in Germany every year called medica. If you are interested in medical devices, I highly recommend going there and checking it out. It's an absolutely MASSIVE grounds with THOUSANDS of vendors showing everything from MRI machines to boroscopes, ambulance equipment...anything related to the medical field. Something which absolutely surprised me when I was there a few years ago was the amount of Io…

> and TONS of platforms wanted to warehouse this data. My coworker and I were there looking for exactly those sorts of things, and it was great to see so much. As I read your comment, I had a growing expectation that you were about to express horror at the mass gathering and warehousing of individuals' health data. I was very surprised when you expressed such excitement at the prospect.

Your doctor already captures this data.

Re: Cuffless device delivers clinically accurate blood pressure measurements

#23

Post by Ice_cream_suit »

This device monitors pressure needed to cause transient digital arteriolar occlusion using MEMs sensors. It then uses an algorithm that uses this data along with pulse oximetry data to estimate the brachial arterial blood pressure.

In situations where it actually matters ( patients with abnormally low or high BP, patients with low peripheral perfusion, patients with peripheral vasoconstriction, critically ill patients ) this will be measuring something with little or no correlation with the brachial BP.

Theranos made similar promises...

Re: Cuffless device delivers clinically accurate blood pressure measurements

#24

Post by sm4rk0 »

blhack wrote: post #21
DoofusOfDeath wrote: post #10

Earlier quoted context omitted.

> and TONS of platforms wanted to warehouse this data. My coworker and I were there looking for exactly those sorts of things, and it was great to see so much. As I read your comment, I had a growing expectation that you were about to express horror at the mass gathering and warehousing of individuals' health data. I was very surprised when you expressed such excitement at the prospect.

Your doctor already captures this data.

In real time and willing and able to sell it to whomever bids more?

Re: Cuffless device delivers clinically accurate blood pressure measurements

#25

Post by thaeli »

tinco wrote: post #4

This sounds like it might be more accurate than the devices the doctors use now. When my blood pressure is measured it drops so fast the standard device starts beeping and fails to get a fix. Last few times the doctor had to use the hand pump to get a good measurement. It's probably not super common and obviously psychosomatic, I doubt my blood pressure would drop if I were unconscious, but I imagine if I can make my…

The algorithm for regular NIBP cuffs is interesting. It's actually measuring MAP - mean arterial pressure - and doing a calculation based on that and heart rate to approximate actual systolic and diastolic numbers. This is usually as or more accurate than a manual cuff where those pressures are directly detected (because there is no human error in hearing exactly when blood is flowing again in your artery) but fails badly for the small number of people who fall outside the characteristics of the groups that were used to develop the algorithm that converts MAP and heart rate into systolic/diastolic pressures.

(The gold standard, which all other methods are compared to, is a direct measurement taken by sticking a needle in your artery and putting a pressure gauge on it. For obvious reasons this is avoided as much as possible.)

Re: Cuffless device delivers clinically accurate blood pressure measurements

#26

Post by thaeli »

Ice_cream_suit wrote: post #23

This device monitors pressure needed to cause transient digital arteriolar occlusion using MEMs sensors. It then uses an algorithm that uses this data along with pulse oximetry data to estimate the brachial arterial blood pressure. In situations where it actually matters ( patients with abnormally low or high BP, patients with low peripheral perfusion, patients with peripheral vasoconstriction, critically ill patient…

I can't tell for sure from this article, but is this still doing an oscillatory method measurement of MAP?

Re: Cuffless device delivers clinically accurate blood pressure measurements

#27

Post by blhack »

sm4rk0 wrote: post #24
blhack wrote: post #21

Earlier quoted context omitted.

Your doctor already captures this data.

In real time and willing and able to sell it to whomever bids more?

Well yes in some cases it is in "real time", but do you know of doctors offices caught selling health data? That seems wildly unethical, and also very illegal. I'd imagine anybody caught doing that would be in jail.

Re: Cuffless device delivers clinically accurate blood pressure measurements

#28

Post by SulfurHexaFluri »

Ice_cream_suit wrote: post #22

IOT medical device security is an increasingly worrying issue, particularly with many platforms wanting to warehouse the data generated.

The accuracy is also often questionable. I have tested cheap smart watches that have heart rate info about as accurate as rolling a dice.

Re: Cuffless device delivers clinically accurate blood pressure measurements

#29

Post by irjustin »

I have High Blood Pressure. 140/100 when non-medicated during the office day. 110/85-90, medicated and relaxed. Having this since 25 (37 now), my genetics sadly puts a cap on my life expectancy (all other vitals normal, HBP runs in family).

All this to say, I hate measuring my BP and follow this space closely. It's a chore that takes minimum 10 minutes twice a day and I have to largely stop what I'm doing.

I would give so much to a device that could measure my BP as easily as O2, but this device is not it. That picture does not inspire confidence.

All the current "continuous" measurement devices are bulky and inaccurate compared to their larger non-"continuous" counterparts. One day I hope the apple watch can do it, but given the physics of BP doesn't seem realistic.

Re: Cuffless device delivers clinically accurate blood pressure measurements

#30

Post by sm4rk0 »

blhack wrote: post #27
sm4rk0 wrote: post #24

Earlier quoted context omitted.

In real time and willing and able to sell it to whomever bids more?

Well yes in some cases it is in "real time", but do you know of doctors offices caught selling health data? That seems wildly unethical, and also very illegal. I'd imagine anybody caught doing that would be in jail.

My point was that your data is safer with a doctor's office then with a "platform":

> And while you might assume that this information is legally protected the same way your hospital and medical records are, that’s not necessarily the case.

https://www.consumerreports.org/health-privacy/are-health-ap...

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