Enable Blood Oxygen Estimation on Charge 3?

[gtipley]

I purchased a new Charge 3 and received it yesterday after hearing that Fitbit has activated a new feature that enables it to estimate blood oxygen levels during sleep. I made the switch from another Fitbit watch that I'd been wearing for a couple of weeks. How do I enable Sp02/blood oxygen monitoring/estimation on Charge 3?

[NICGuy59]

On a thread about sync issues, it was mentioned that changing the display face could affect the EOV graph. The poster said to 'Clear User Data'.  So, both my Better Half and I had changed the display on our Charge 3s.  We cleared the user data on both devices (after sync'ing to preserve data on the account), and this morning we both had graphs.

[nets79]

interesting! I did change my clock face previous to losing oxygen sensor. Thanks!


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[Ohbytheway]

Hello,  I have Sleep Apnea and wish to monitor my O2 saturation PERCENTAGES.  These devices (Versa 2 in my case ) only give you variations either hight or Low , not percentages. The problem is that you cant  even figure it relatively ,because there is no way to even know where the 100% is on the O2 graph.  These aren’t medical devices and are not “pulse oximeters” apparently , and you can’t find out anything from technical support or even “high level technical support. They don’t know the device well at all or won’t give the information. Signing up for  Premium DOES NOT give it either. I was told it does , but when I signed up found it to be more false information. If anyone has information about deciphering the  O2 saturation graph for actual percentages, rather than just variations, please advise me. I’m getting no where. Thanks   

[Willy_boy]

If you exactly want to know the oxygen level in your blood you have to use another device. One that clamps aroubd your fingrr and sends infrared right through your finger. Then you can get the exact percentage at that moment. Cost starts at about 2p tk 30 bucks. If you want to log continous  it in an app , you pay some more. The fitbit cannot measure exact oxygen level as far as U can read in their specs. It only meadures variations for what its worth. But if you see a lot of  large spike there, chances are that your oxygen dropped at those moments. If you really want to know the exact percentages then, I guess you could use a clamp device that logs the data. But that is only my 2 cent contribution to this interesting matter.

[Ohbytheway]

Thanks. Yes I figured that. I’m in search of a true pulse oximeter which can track over eight hours. I have found them at drug stores but they only do momentary readings.

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[Crompton]

Hi,
Once you have the proper O2 sensor, you could correlate its readings with the Fitbit’s readings.
You’ll get a good idea of the Fitbit measurement process.
Jim

Sent from my Sinclair ZX81

[Ohbytheway]

Yes you are right . So what I need to know At a minimum on the fitbit o2 graph, is exactly where the 100% saturation line is- then I could figure the relative reading. Is it in the center of the two high/ low lines ( averaging the line of readings you see If you make The middle of your plotted reading the 100% line)?
Also using the standard instant reading pulse o2 finger system without overnight tracing, makes it impossible to determine that, because the Fitbit only charts at night as you sleep. Eg can’t Even plot a few readings for a relative comparison., then apply it to the Fitbit o2 chart

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[Willy_boy]

So I found one oxygen level metering device, up to 72 hours continous at 

http://www.turnermedical.com/ChoiceMMed_MD300W314_Wrist_Pulse_Oximeter_p/choicemmed_md300w314.htm

It is not for free but looks like doing the trick.

And the same measurement one night in a hospital is more expensive.

The cheapet method would be using the $ 30,- fingetclamp and the neasuring just before you go to sleep. When I look at the fitbit sleeping graph of mine I can see that I fall asleep immediatly mostly right in the deepsleep.  So that would be a good start to take the last O2 measurement as the starting average. But nothing scientific in this theory of mine of course. But real medics also are not so sure, as they say: the last docter is always right  (specialy if it is the pathalog anatomist 🤣)

But ad far as what the reference level would be in th fitbit O2 graph, I do not think that 100% can be in the middle, cause 100% would mean the maximum amount of oxygen your blood can hold. If youre normal average would be 80%   then  you can go max  20% up or 80% down (in the case you stop breathing). In that case the variation is at its top. As I interprete the meaning of the graph. But only fitbit specialist can explain if this is correct..

[nets79]

My oxygen sensor reappeared after 1 month off. alls good.


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[Cnjsmom]

I had it until some time last week. Not happy. 

[charandy123]

What I REALLY want to know is how helpful is this blood oxygen reading
anyway? I already know that I didn't sleep enough hours. So far, that's
the only feedback that is important. I want to know if it detects sleep
apnea. If it does, then it is helpful. If it doesn't, then what
difference does it make?

[Ohbytheway]

Hello, I’m on the same page but the problem is the fit bit does not give you the percentages of your o2 saturation. It’s supposed to remain at 96-100%. The low high range with many variations , especially if you are getting yellow peaks probably means you have apnea. You need an actual pulse oximeter which records overnight for exact readings. TheY do make such a device . It’s a wrist watch with a finger monitor connected to the monitor. But take it from someone whom now has had documented sleep apnea for 30 years, you need to do a sleep lab test to determine this, at a sleep
Lab overnight.
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[amathew89]

it is not working for me for few days now. I am not that impressed with fitbit anymore 😕 

[Awsmday]

My blood oxygen level has not been working for the last few days as well. I wonder what is going on? 

[Deanna29]

I've been reading up on Garmin... Excellent reviews .. Just a bit pricey.

[JEAE]

After I downloaded the app on to my smart phone (rather than laptop) I got the oxygen variation graph for two days and then it disappeared.  Does anyone know of an email address for support at Fitbit?

[NICGuy59]

Silly, but did you change the clock face?  You may need to reset the watch to reactivate the EOV graph.  I had to do this, on the advice of another user, and I got the graph back.

See my post above on: 06-28-2020 07:57