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A comment on Apple Watch Likely to Gain BP, Blood Glucose, and Blood Alcohol Monitoring. Parent comment

Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by _Microft on Monday May 03, 2021 @06:02PM (#27031360)
Blood oxygen levels are also measured optically already. If you can find an optical property of blood (that depends on a particular substance) which can be measured through the skin (infrared light can penetrate skin and flesh to some degree), you can build a sensor for it.
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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by Pokepokalypse on Monday May 03, 2021 @07:12PM (#27032097)
Sure but oxygenation is strongly correlated with hemoglobin color, so it's very easy.

Blood pressure, on the other hand, is very difficult to measure, and it fluctuates wildly based on a wide variety of confounding factors. It would be amazing if they figured out a way to get this information optically.

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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by ilaksh on Monday May 03, 2021 @06:05PM (#27031401)
Infrared. Got it. Thanks.
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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by Someone on Monday May 03, 2021 @06:35PM (#27031745)
Could be something else. The wikipedia page on this technology (https://en.wikipedia.org/wiki/Noninvasive_glucose_monitor) mentions “bioimpedance spectroscopy, microwave/RF sensing, fluorescence technology, mid-infrared spectroscopy, near infrared spectroscopy, optical coherence tomography, optical polarimetry, raman spectroscopy, reverse iontophoresis, and ultrasound technolog“

That page also claims there isn’t any clinically or commercially viable product yet. That seems out of date to me, given that https://www.labiotech.eu/best-biotech/needle-free-glucose-mo... mentions 8 devices you can buy now.

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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by FireBeyond on Monday May 03, 2021 @06:49PM (#27031901)
> That page also claims there isn’t any clinically or commercially viable product yet. That seems out of date to me, given that https://www.labiotech.eu/best-biotech/needle-free-glucose-mo... mentions 8 devices you can buy now.

"needle free" !- "non-invasive".

Several of those devices are implanted subdermally.

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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by kergonath on Monday May 03, 2021 @06:52PM (#27031935)
> raman spectroscopy

And now I can’t stop thinking about wearing a Raman spectrometer on my wrist :)

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Re:Apple Watch Likely to Gain BP, Blood Glucose, and Blood A... by _Microft on Monday May 03, 2021 @06:09PM (#27031452)
It is called near-infrared spectroscopy ("NIRS") and you can read more about it here:

https://en.wikipedia.org/wiki/Near-infrared_spectroscopy

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