Apple Watch SpO2 during sleep.

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
Janknitz
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Re: Apple Watch SpO2 during sleep.

Post by Janknitz » Mon Jul 18, 2022 11:41 am

ChicagoGranny wrote:
Sat Jul 16, 2022 7:48 am
Janknitz wrote:
Fri Jul 15, 2022 7:08 pm
Last night, my watch only made 11 measurements.
That's a lot! Most nights my AW only measures it about 4 -6 times.
My measurement count varies a lot. Last night it was 4 measurements. I wonder if the variation has something to do with how restful sleep is?
I don't know how it determines when to measure. I wind down in the evening by watching a video or reading (on my phone which I get is poor sleep hygiene). The sleep app marks me as asleep then because I'm not moving much. I don't tend to move much in my sleep, just change from one side to another once or twice and I wake up to full consciousness do that. It would seem if you are restless it would "think" you are awake, and not take measurements.
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Skyking
Posts: 23
Joined: Fri Sep 09, 2022 4:19 pm

Re: Apple Watch SpO2 during sleep.

Post by Skyking » Sun Sep 25, 2022 6:55 pm

Architect wrote:
Sun May 29, 2022 3:12 pm
ChicagoGranny wrote:
Wed May 25, 2022 6:57 am
Janknitz wrote:
Tue May 24, 2022 8:15 pm
(but it has validated the atrial fibrillation detection via the heart rate monitor)
I like the watch, but Apple irritates me in the way they promote this. They mislead by claiming Apple watch will warn of AFIB. The only time the watch does an ECG is when the wearer stops, sits quietly, presses the crown for an ECG, and quietly holds a finger on the crown for 30 seconds. Intermittent fibrillations are common. There is a good chance that most of them happen when the user is not taking an ECG. Of course, the problem of intermittent fibrillation is also present with ECGs in a doctor's office.
Apple watch saved my brothers life, I don't remember all the technicalities he shared, he felt fine but his resting heart rate was 120, abnormal sinus rhytem. He's very stubborn, believed watch was malfunctioning, cause he felt fine. Family finally convinced him to visit ER, he finally went late that evening, diagnosed AFib.

My Fitbit charge 5 rarely detects sp02, so I purchased a finger oximeter, which works 50%
+1

Woke up with an afib warning but felt fine. I take heart meds to keep my rate in high 40’s-50’s so it wasn’t terribly high but still. Cardiologist said yep…afib and started blood thinners. A few days later no more afib warnings so I did an ECG. No afib. Called the doc and said cancel the cardioverseion. He said no…come in. No afib. Perfect? No…but I get a new one watch every other year and yes…I trust it.

Janknitz
Posts: 8410
Joined: Sat Mar 20, 2010 1:05 pm
Location: Northern California

Re: Apple Watch SpO2 during sleep.

Post by Janknitz » Tue Sep 27, 2022 8:07 pm

Woke up with an afib warning but felt fine. I take heart meds to keep my rate in high 40’s-50’s so it wasn’t terribly high but still. Cardiologist said yep…afib and started blood thinners. A few days later no more afib warnings so I did an ECG. No afib. Called the doc and said cancel the cardioverseion. He said no…come in. No afib. Perfect? No…but I get a new one watch every other year and yes…I trust it.
I would absolutely trust it for A-fib, blood oxygen not so much though. They are NOT the same. And apple doesn't make accuracy claims on the blood oxygen readings.
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dataq1
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Location: Northeast Ohio

Re: Apple Watch SpO2 during sleep.

Post by dataq1 » Wed Sep 28, 2022 3:28 pm

Janknitz wrote:
Wed May 25, 2022 12:23 pm
Firstly, thanks for the tip on the EMO80 recording oximeter! Got it yesterday (still 39$ ) and it seems to work well. Tried it last night and was very happy with the reporting capability.

Comment on detection of A-FIB.... Wife uses a Fitbit (Versa2) that displays her pulse rate and the iPhone app then displays her pulse rate in 5 minute chunks. What we observed was that if her pulse rate (5 minute averages) on the app was swinging wildly from a normal 50 bpm to 100+ bpm, that seemed to be consistant with her feeling (sometimes vague) that she was having an A-FIB episode. Subsequently she wore a (medical grade and prescribed) Holter monitor for two weeks.

Lo and behold, during that two week period the one 5 hour episode of Holter-determined AFIB exactly matched the Fitbit recorded (and self-interpreted AFIB) episode both in onset and duration.

Her cardio electro guy now asks that she monitor her afib episodes on a month to month basis using her Fitbit.
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Janknitz
Posts: 8410
Joined: Sat Mar 20, 2010 1:05 pm
Location: Northern California

Re: Apple Watch SpO2 during sleep.

Post by Janknitz » Tue Oct 11, 2022 12:36 pm

I have sort of a corollary to this saga. I just spent a week in Albuquerque visiting my daughter. When we went about 1 1/2 years ago, I had some shortness of breath due to altitude but I felt fine, this time I was very short of breath and did not feel well at all. Even worse when we spent the day in Santa Fe which is 2200 feet higher in elevation. My daughter (who is a medical resident) was trying to decide if I needed to go to the ER that day, but just going back "down" to Albuquerque helped some.

Stupidly I did not take my pulse oximeter, but I had my Apple Watch, which I still think is somewhat unreliable in measuring blood oxygen. I have seen readings in the 80's before when I felt perfectly OK, but this time I had readings down to 86% during the day, while awake and did NOT feel fine. I was short of breath and just felt terrible, exacerbated by the fact that my daughter's apartment is two stories and every time I had to go upstairs I felt like I was climbing Mount Everest. So I'm more inclined to believe those. My asthma was bothering me too, and generally I have ZERO issues with asthma and don't take any medications any more (except that I do have a rescue inhaler in case).

During the night on CPAP, my blood oxygen levels were good, up to 100! So that was positive, and I was tempted to use the CPAP just for some relief when we got back from Santa Fe, although after getting back to AlbQ and using my inhaler I felt better so I never did (not sure it would have done anything anyway, since the issue wasn't obstruction). I did seem to acclimate a little so by the end of our visit I was feeling about 75% better. At home I feel just fine.

Last year in AlbQ my oxygen levels were really good, despite some shortness of breath on exertion.

I'm checking my O2 sats with my pulse oximeter intermittently during the day and I think I need to get an appointment with a pulmonologist because my sats aren't great during the day with this more reliable measure--92 -94 more often than not. When I had pneumonia my PCP was freaked out that I was walking around with 92%. I don't have any respiratory symptoms now that we are home, but this is making me wonder if something is going on.
What you need to know before you meet your DME http://tinyurl.com/2arffqx
Taming the Mirage Quattro http://tinyurl.com/2ft3lh8
Swift FX Fitting Guide http://tinyurl.com/22ur9ts
Don't Pay that Upcharge! http://tinyurl.com/2ck48rm