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figure this one out

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Dude +0 points · 3 months ago Original Poster
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Sierra +0 points · 3 months ago Sleep Patron

What I normally do when I see this is to drill down to look at each of the CA events to try and figure out what may be initiating them. I like to display Minute Ventilation along with the Flow Rate graph to see if the breathing depth is cycling. I find in some case I have a disturbance of some kind, like a obstructive event or partial one that starts the cycle, and then at the minimum of the cycle I get a CA event, which then may repeat.

Unless this is a regular occurrence I would not worry much about it. If it is happening all the time then the first thing I would try is to reduce the pressure until I start to see some OA events. In general I try to use the lowest pressure possible without causing many OA events.

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Dude +0 points · 3 months ago Original Poster

My pressures have been adjusted way back when I got the machine, but it didn't get rid of Hypopneas, a high trigger did. Good up until this point. This is the second night without Obstructives and Hypopneas with clusters of centrals. Different if the centrals were under 10 seconds.... The breathing cycle, minute ventilation, shows I stopped breathing but as you said a disturbance just before the central, I see, and the minimum of the cycle meaning? Long exhale/pause in inhale? I only see one or two that don't follow a disturbance, I remember now. Needed a refresher... THANKS !

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Sierra +0 points · 3 months ago Sleep Patron

Here is an example of a OA event in the middle of quite nice smooth sleep at 6:39. It starts a cycle and 5 minutes later at 6:44 there is a CA event. They are not unrelated. The OA caused the CA. But the fact that that the OA caused the cycle is an underlying issue. My O2/CO2 regulation is not that stable.

You may, or may not have similar issues. But that is the level of detail that you need to look at to figure out what is going on. In the short clip you posted I did not see that issue, but you have to look at each one to see what is going on.

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Dude +0 points · 3 months ago Original Poster

I think I know what the issue is....

I got a new machine due to whining noise and the RT at the DME told me it was probably a bad turbine and I believe it wasn't delivering the amount of air as per the flow rate shows more L/minute during the breath oscillations. I also noticed that a high trigger was a bit much and was wondering if that caused the Centrals? I lowered the IPAP 1 cmh20 and raised the trigger back to high. If the HA still show up I'll raise the IPAP where it was and leave the trigger at high but use the ramp setting to fall asleep before the normal pressures come in.

Here's last nights screenshot...

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Dude +0 points · 3 months ago Original Poster

just thought of something... no OA's just centrals alone night before last. I noticed leaks that I never had before... cinched up my mask and it felt better where I had the settings before.

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