Very High CA Events in Oscar

[dupre299]

Here is sleep study - I have some more docs like the script I believe too

[dupre299]

I have read some of your posts SarcasticDave and the one thing I am curious about is on my story my CAs gradually started from January 2023 to February 2023. All of January 2023. - every single day - was fine. In February about 70% of days were fine. Now in November December about 5%-10% of days are fine.

Your situation I think was slightly different from what I read, i.e. you always have had CAs off and on depending on the day.

Does that change how my situation might be viewed - i.e. is it my equipment?

[SarcasticDave94]

I think the answer is, it might. If I'm interpreting the report correctly, pAHIc at 5 would be Central based events. If true, you had some Central Apnea.

Again if I'm accurate, pAHI should indicate Obstructive Apnea at 55.

So there were CA on your test, but small event count versus Obstructive. Normally, ASV is for those with 50% or greater CA within overall events.

I'll wait for others to comment too, you may want to request a titration involving both BPAP and ASV.

After 11 or so months, I'm pretty sure these current CA will not be treatment emergent. Idiopathic CA possibly, meaning unknown medical reason.

If you're events are remotely like mine, CPAP is likely better than BPAP without backup rate.

[Gideon]

Assuming the above zooms are typical.
That does not look like central apnea, not obstructive either. Without a doubt clear airway events, I'll trust the FOT on that.

Your sleep study showed clusters of obstructive events, typically indicating a positional apnea.

The fact that, without looking at the daily numbers, you say the central events are the same tends to support that they are not central. If they were I'd expect to see some increase in centrals with taking EPR to 3, full time.

So any weight changes, pillow changes, or bedding changes?

I'm going to ask you to try a soft cervical collar on a hunch, that you are in fact, tucking your chin and this is how it manifests. The sleep study somewhat supports this.

[Dormeo]

Your sleep-study report should include information about central apnea and hypopnea events. If you can dig it out and scan it, could you post it here? Also, could you let us know what medications or drugs you are using, whether prescription or non-prescription? At what altitude do you live? And do you have any pulmonary (lung) problems?

[paulag1955]

How do you differentiate between central and clear airway events?

[Sleeprider]

Paulag, a central event will normally arise from gradually diminishing breathing volume to a CA event and gradually resume, while an obstructive event typically shows flow limitation and recovery breathing. In this case, the flow chart shows no change in respiratory volume, but the FOT indicates a clear airway event. To my eye, I suspect a periodic leg movement or other cause for the very steady pace of apnea events, but it just doesn't look like central and the sleep study did not identify CA as an issue. There are better tests than WatchPAT but these events do not appear obstructive or even positional because of their very short duration and regular occurrence. At the moment, I'm just an observer in this thread.

[Gideon]

Sleeprider, it is comforting to know that you also are having issues reading this.

[paulag1955]

Thank you for that. I'm still unclear, though, on whether or not central and clear airway events are the same thing.

[Crimson Nape]

Technically, they are different. To actually differentiate between them requires an EEG. For our purpose, they both produce the same result. . . not breathing.

- Red