Help titrating BIPAP for sensitive sleeper

Miss Emerita wrote: ↑

Wed Dec 17, 2025 12:39 pm

...the bumps or lumps in the inhalation trace.

That's actually part of the expiratory limb, so IMO probably cardioballistic artifact.

semblables wrote: ↑

Wed Dec 17, 2025 4:19 pm

... the data...

When I switched from CPAP to BIPAP I felt 10x better and had deeper more restful sleep.

Well, looking at "the data":
there does appear to be a very slight decrease in the presence of naps, so I'd say maybe 0.3x better.

However, what jumps out is the amount of "sleep" (and IDK if xPAP time equates to actual "sleep" time) is a LOT (starting to move into pathological range); the need (or at least presence) of naps despite an abundance of sleep; and a sleep period that some people might consider to be "socially unacceptable" (lunchtime and you're still in the rack?)(but an xPAP clock is not necessarily a "real" clock).

Respiratory events essentially -0- for the period regardless of mode.

Anyway, that's MO of "the data".

Nocibur wrote: ↑

Thu Dec 18, 2025 4:04 am

there does appear to be a very slight decrease in the presence of naps

And even that doesn't look like it's going to be sustained.

semblables wrote: ↑

Sun Dec 07, 2025 4:32 pm

On CPAP in an in-lab sleep test I was having 11-12 non-movement arousals per sleep cycle, so apparently that's enough for my sleep quality to tank.

Arousals/sleep cycle is not what you'd call a "traditional parameter", but if a sleep cycle is ~90 minutes, then the arousal index would be ~8.0.

Would that cause sleep quality to "tank"?

Sincerely doubt it, but if that were the case, IIWY I'd be looking for the cause of AI 8.0.

Nocibur wrote: ↑

Thu Dec 18, 2025 3:45 am

Miss Emerita wrote: ↑

Wed Dec 17, 2025 12:39 pm

...the bumps or lumps in the inhalation trace.

That's actually part of the expiratory limb, so IMO probably cardioballistic artifact.

I'd love to learn why the "bump" in the first part of inhalation is part of the "expiratory limb." Probably I don't know what "limb" means here. I googled the term but didn't find anything I actually understood. Sigh. Hoping you can help!

Miss Emerita wrote: ↑

Thu Dec 18, 2025 12:39 pm

I'd love to learn why the "bump" in the first part of inhalation is part of the "expiratory limb."

It's not the first part of inhalation-- it's the last part of exhalation.

Inspiratory phase is only when there is actual inspiration. Expiratory phase is everything else.

OK, good; that's what I thought. But when the OP starts inhalation, there isn't smooth acceleration at the outset; instead there's a pointy bump or lump. Maybe it doesn't have any significance, but I thought it was a bit unusual. I've pasted in the screenshot again so you can take a look.

Miss Emerita wrote: ↑

Thu Dec 18, 2025 4:57 pm

...when the OP starts inhalation, there isn't smooth acceleration at the outset; instead there's a pointy bump or lump.

Oh right! I should have paid attention to your original point:

One is that many of your inhalation curves have a more pointed shape than we usually see.

Anyway that's probably BiPAP Engineering. Would need the Oscar file uploaded to a third party server to show why that is (the one advantage Oscar has over SleepHQ).

Hi! I've got a bit more data for the higher EPAP of 7.6:

https://sleephq.com/public/08276559-6b5 ... da8ae5864e

Any interpretation / settings recommendations would be welcome!

One is that many of your inhalation curves have a more pointed shape than we usually see.

Nocibur Wrote:
Anyway that's probably BiPAP Engineering. Would need the Oscar file uploaded to a third party server to show why that is (the one advantage Oscar has over SleepHQ).

semb2.jpg
[/quote]

The pointed wave shape in question is what most of mine look like with APAP therapy. Does anyone know why some have such a breath wave shape?

ejbpesca wrote: ↑

Mon Dec 22, 2025 3:36 pm

Does anyone know why some have such a breath wave shape?

Yes.

Nocibur wrote: ↑

Sun Dec 28, 2025 7:27 am

ejbpesca wrote: ↑

Mon Dec 22, 2025 3:36 pm

Does anyone know why some have such a breath wave shape?

Yes.

Using APAP not BiLevel so what do you think causes the steep to a point waves?

ejbpesca wrote: ↑

Sun Dec 28, 2025 3:59 pm

Nocibur wrote: ↑

Sun Dec 28, 2025 7:27 am

ejbpesca wrote: ↑

Mon Dec 22, 2025 3:36 pm

Does anyone know why some have such a breath wave shape?

Yes.

Using APAP not BiLevel so what do you think causes the steep to a point waves?

I too would love to hear Nocibur's explanation of that.

ejbpesca wrote: ↑

Sun Dec 28, 2025 3:59 pm

Nocibur wrote: ↑

Sun Dec 28, 2025 7:27 am

ejbpesca wrote: ↑

Mon Dec 22, 2025 3:36 pm

Does anyone know why some have such a breath wave shape?

Yes.

Using APAP not BiLevel so what do you think causes the steep to a point waves?

Did you do that favor about Albercook that I asked you to do for me?

Nocibur wrote: ↑

Mon Dec 29, 2025 3:37 am

ejbpesca wrote: ↑

Sun Dec 28, 2025 3:59 pm

Nocibur wrote: ↑

Sun Dec 28, 2025 7:27 am

ejbpesca wrote: ↑

Mon Dec 22, 2025 3:36 pm

Does anyone know why some have such a breath wave shape?

Yes.

Using APAP not BiLevel so what do you think causes the steep to a point waves?

Did you do that favor about Albercook that I asked you to do for me?

I do not have an Albercook favor asked of me. I am curious as to why breath waves show as a steep rise to a sharp peak as opposed to a rounded shape.