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My new CMS50F oximeter
It has arrived from China. Very fast delivery, much faster than I expected.

Of course, like with every new toy, I had to try it out immediately. So, I took a 2-hour nap with no CPAP machine attached. I just wanted to see what my SpO2 numbers would look like without therapy.

After struggling a bit, figuring out how to import into SleepyHead, I got my report:

SpO2 Min - 86
SpO2 Med - 92
SpO2 95% - 94
SpO2 Desaturation - 7.85%
SpO2 Baseline Used - 93%

I guess this is not too bad, even though I had a few dips below 90%, but they did not last for very long. It will be interesting to see if these numbers will be improved with my CPAP machine on.

Now I just need a few electrodes, and it'll be like in a sleep clinic. Too-funny
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ppca, wondering how your results turned out using your new toy while on CPAP. Mine showed a marked improvement when I first checked.
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I was a bit surprised to see that there was no significant improvement. At least, I don't see it in these numbers.

Since SleepyHead merged results from my afternoon nap and the overnight sleep, here are some numbers taken from SpO2 Review software:

Basal SpO2: 91.8% (no CPAP) - 92.4% (CPAP)
Avg. low SpO2: 89.5% (no CPAP) - 90% (CPAP)
SpO2 below 95%: 97.1% (no CPAP) - 94.4% (CPAP)
SpO2 below 90%: 2.2% (no CPAP) - 1% (CPAP)

I may be comparing apples and oranges here (a short afternoon nap versus an overnight sleep), but these numbers are not that much different. However, even those numbers from the no-CPAP study looked pretty decent to me, so I don't see too much room for improvement.

One thing is very interesting though. My SpO2 below 90% shows 2.2% (no CPAP) and 1% (CPAP), while my overnight sleep study, as I mentioned in another thread, reported 96.7% below 90%. Something just doesn't sound right here.
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Your oxygen saturation is clearly GOOD when you are up and about. Typically takes about 2 hours before it starts dipping because unlike a nap, there is no recovery period where you get up. That's why many of us DO feel better after a nap before we get a cpap. I believe if you took a 3-4 hour nap, you would see a marked difference.
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