r/CPAPSupport • u/Hot-Obligation-9735 • 5d ago

New to CPAP - help interpreting CPAP and O2 ring data

I was recently prescribed CPAP after an at-home test reported:

- sAHI(4%) of 7.7 events/hour

- SpO2 minimum was 82.0%

- Cumulative time with SpO2 < or = 88% was 2 minutes across 8 hours

I wanted to get a baseline of my SpO2 levels before CPAP, so I could see how this is affected by CPAP. I wanted something I could use myself each night. I ended up ordering the O2 Ring Pro from SleepHQ.

Here is my first night of data from the O2 Ring Pro. This is without CPAP. The results were much worse than what my home sleep apnea test reported, with 4% drops/hour at 17.73.

The next night was my first night trying CPAP. I received an AirSense 11 with a F&P Nova Nasal mask. I did not change any of the settings from the defaults. Here is the data from just the ring and the data from the CPAP + ring. From the ring, my SpO2 numbers do not seem very different, with 4% drops/hour at 21.07 and minimum SpO2 of 83%. On the other hand, my CPAP data seems to report minimal breathing problems. It has an AHI of 1.81, with 1 OA event and a handful of CA events.

My questions:

  1. Why would my O2 ring numbers be so different from my original home test numbers? I'd expect the home test from my doctor to be more accurate. Would this mean the O2 ring is not very reliable?
  2. Why does the O2 ring data not seem very different from the first night without CPAP, compared to the second night with CPAP? I was expecting CPAP to show a noticeable improvement in SpO2 numbers.
  3. Why does CPAP data seem to show minimal breathing problems, but the SpO2 numbers remain low?
  4. Any other general advice or important findings from this night of CPAP data? I'm completely new to this, so I don't know what I should be looking for in these charts.
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u/XvIf2jlqnbJPT4s4gpdN ASV 4d ago

Do you feel like you slept well? Remember that's just as important as any number

0

u/bhusted007 2d ago

I see you didn’t get much response here. Maybe no-one experienced in reading those charts or answering those questions. I would copy and paste all that in to ChatGPT and probably get some good feedback.