CPAPtalk.com

As you can see, I had a rather rough night. I lowered my PS to 3, but I moved it back up when I awoke. I'll give it a shot a 5 tonight, then move it down each night in increments of .2 The two gaps are when I got up and read as I couldn't fall back asleep.

apw5746, I can't give you settings help, but you are having a lot of centrals. My suggestion would be to left click on your flow line until you can see the wave and take a screen shot. Then post both this one and the new one together in a new post. There you might get more looking at the post who are bypassing one titled about posting a screen shot. Have you always had centrals? Or are these new or increasing? And do you wear a SaO2 monitor?

Yesterday you dropped your PSmin from 6.0 to 4.0 and had a pretty good sleep. Today you increased PSmin back to 5.0 and AHI was over 30. I don't follow your logic in making that change. It might be wise to stick with a good thing until you have a good reason to change it?

Sleeprider wrote:Yesterday you dropped your PSmin from 6.0 to 4.0 and had a pretty good sleep. Today you increased PSmin back to 5.0 and AHI was over 30. I don't follow your logic in making that change. It might be wise to stick with a good thing until you have a good reason to change it?

+1

PS was a 4, dropped to 3 the night of 19th and had over 30 AHI. Put it back to 4 the morning of 20 Jan. Going to see what 5 will show for AHI on night of 20th was what I meant to say. Sorry for any confusion. palerider and I had a discussion about lowering PS in a PM. That is going from 4 to 3. I tried it again last night to see if it reading were really true. Which they were. Tomorrow will show what's what, won't it?

5 didn't work. Back down to 4. See my sleep doc 9 Feb about centrals.

Sleeprider wrote:Yesterday you dropped your PSmin from 6.0 to 4.0 and had a pretty good sleep. Today you increased PSmin back to 5.0 and AHI was over 30. I don't follow your logic in making that change. It might be wise to stick with a good thing until you have a good reason to change it?

I tried to explain that MORE pressure support leads to blowing off MORE co2, and in some people this induces or exacerbates centrals.... I don't think I got through.

maybe you'd have better luck.

APW5746, you really should start your own thread about dealing with this CA and bilevel settings. I'd be interested in knowing how long the duration of these events are. Can you screenshot the events tab on daily, or just describe the CA and OA durations? It would be really good to get a closeup view of the wave form data in those CA clusters. In other words zoom in until you can clearly see the respiration wave pattern and marked events. The zoomed out view of the flow rate shows higher amplitude waves during the periods of CA than during periods of relatively low AHI, and I'm wondering if this is due to breathing pauses followed by large recovery breaths. The zoomed view might offer some insights.

Palerider is correct that a very low CO2 level from hyperventilation can reduce respiratory initiative. I don't think rebreathing CO2 is as important to maintaining that balance, as the overall respiration rate, after all, we don't rebreath much air as we go about our daily activity. Your respiratory rate is low-normal at a median of 14.8 (max 22) which should retain plenty of CO2. Hopefully the minimum rate of 2.0 is not something that happens often.

Wish I had some better suggestions. If you start your own thread we might get some broader participation from members with ideas or experience in dealing with this.