sp02 monitoring

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
1speechpick
Posts: 126
Joined: Wed Jun 09, 2021 12:16 pm

sp02 monitoring

Post by 1speechpick » Sat Jul 03, 2021 3:46 pm

Are fitness watches considered a fairly reliable device to monitor night time sp02? Last night on my Garmin, I noticed the first half of the night things were fine, but for about an hour (in the last half of the night) the sp02 readings were in the mid to low 80s. I wasn't sure how concerned I should be given it is a fitness watch. Any thoughts or insight? It's the vivosmart 4 Garmin.
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gadgetmaniah
Posts: 129
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Location: Pakistan

Re: sp02 monitoring

Post by gadgetmaniah » Sun Jul 04, 2021 6:32 am

Not a fitness watch, but have you heard of the Wellue O2 ring? It uses medical grade oxygen tracking and has good reviews. https://getwellue.com/pages/o2ring-oxygen-monitor

I was looking to get a fitness watch for tracking oxygen levels but I read that their oxygen tracking can be inaccurate. If you read the reviews for the Vivosmart 4, some people have compared its oxygen tracking with that of a real oximeter and have observed a lot of discrepancy. See here for example https://forums.garmin.com/sports-fitnes ... rippleware
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1speechpick
Posts: 126
Joined: Wed Jun 09, 2021 12:16 pm

Re: sp02 monitoring

Post by 1speechpick » Sun Jul 04, 2021 9:20 am

gadgetmaniah wrote:
Sun Jul 04, 2021 6:32 am
Not a fitness watch, but have you heard of the Wellue O2 ring? It uses medical grade oxygen tracking and has good reviews. https://getwellue.com/pages/o2ring-oxygen-monitor

I was looking to get a fitness watch for tracking oxygen levels but I read that their oxygen tracking can be inaccurate. If you read the reviews for the Vivosmart 4, some people have compared its oxygen tracking with that of a real oximeter and have observed a lot of discrepancy. See here for example https://forums.garmin.com/sports-fitnes ... rippleware
Thanks for the links! I actually just ordered the Wellvue ring (non-bluetooth version). I'm excited to get it. I think it will give me the data I am looking for.
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gadgetmaniah
Posts: 129
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Location: Pakistan

Re: sp02 monitoring

Post by gadgetmaniah » Sun Jul 04, 2021 10:17 am

You're welcome. Yes, hopefully it will!
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Jlfinkels
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Re: sp02 monitoring

Post by Jlfinkels » Sun Jul 04, 2021 10:51 am

Get a PhD’s view on fitness trackers and smartwatch’s accuracy.

https://youtube.com/c/TheQuantifiedScientist
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Thumper1947
Posts: 93
Joined: Sun Feb 16, 2020 11:30 am

Re: sp02 monitoring

Post by Thumper1947 » Tue Jul 13, 2021 2:56 pm

1spee,
The wellue ring is great. Very easy to see when you are in REM sleep. Integrates well with Oscar, but a little confusing. Try this link if you need help importing into Oscar. If you still have a problem, post in on here and I think I could help you out. The link may be all you need.

https://www.apneaboard.com/wiki/index.p ... ile_Import
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GrumpyHere
Posts: 289
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Re: sp02 monitoring

Post by GrumpyHere » Tue Jul 13, 2021 9:03 pm

Thumper1947 wrote:
Tue Jul 13, 2021 2:56 pm
wellue ring is great. Very easy to see when you are in REM sleep.
Thumper1947 wrote:
Wed May 12, 2021 11:12 am
for me and this one use of tracking REM sleep, it's easier to see the stable SPO2, steady heartrate, and especially no motion. Here's a screenshot of REM sleep and towards the right of the screen you can see the motion start and HR increase as I came out of REM sleep.
Thumper,

What you believe to be REM is more likely to be Deep Sleep.
During REM sleep, your brain becomes highly active and your heartrate more variable as you dream.
https://www.health.harvard.edu/blog/how ... 1012921846

“Your heart rate can vary quite a bit during REM sleep because it reflects the activity level occurring in your dream. If your dream is scary or involves activity such as running, then your heart rate rises as if you were awake,” says Dr. Epstein.
Your choice of "no motion" as a parameter is correct because during REM one normally experience sleep paralysis.

Instead use "no motion" and heartrate variability as rude markers for REM.

There is research on just using heartrate variability to determine sleep staging.
But at the current state of of art, you really need EEG.
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Thumper1947
Posts: 93
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Re: sp02 monitoring

Post by Thumper1947 » Fri Jul 16, 2021 2:53 pm

Grumpy,
Thanks, I just saw your post. That was interesting, and sounds like your knowledge of this exceeds mine. I was also using the typical times periods when you enter REM sleep, about 90 minutes after entering sleep and about each 90 minutes thereafter. I follow this pattern very closely practically every night. I can see what you said about heartrate fluctuating while dreaming, that makes sense. I don't really know, but of dreams that I remember, they almost always happen near the end of the night. Kind of a murky area for me. Again, thanks for the info. Learn something new every day.
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