Can a pressure increase cause hypopneas?

I did some research on this and it stated that increasing to too much pressure can cause centrals. I was wondering if it can cause hypopneas too. I increased my PSMin pressure and found that my AHI increased and I had alot more hypopneas than before. This is well about 1 week worth of data.

Edit: Does the hypopnea decrease after getting adjusted to the new pressure? Or would it be like a permanant increase?

No - couldn't increase anything unless other things changed. Have you been back sleeping (that often does it).

What are your pressures at?

I havent been sleeping on my back. Basically i have been doing the regular routine. Side sleeping and pillows stacked. I havent changed anything other than my pressure and it is around the same time that my hypopneas increased consistently. My ahi was raised by about 5 when before my ahi was lower.

Could it possibly be that I am inhaling too much oxygen and my body wants me to slow there therefore the hypopneas kick in?

My pressures are 7 min EPAP 3 PSMin. I forgot the maxes but I can get to them when I get back home from work. Basically I increased my EPAP by 1 and my PSMin by 2. I will even provide pictures once I get home

Hi Dave5059,

Hypopneas CAN be central, so yes increasing pressure can increase hypopneas if they are central in nature. But we're missing lots of infos here... What was your sleep study results, what is your machine, why did you increased your pressure, what was your AHI before the increase, how long have you been on xPAP?

I understand you're at work and I'll check at your answers and graph when you'll post them. Good Sleepyhead screenshots are always really appreciated and really helpfull. There's some thread that discuss what is the most helpfull Sleepyhead screenshot to post here and you should look into those before posting your screenshot. Sorry I don't have a "quick" link to give for that but it shouldn't be to hard to find.

OSAHell wrote:Hi Dave5059,

Hypopneas CAN be central, so yes increasing pressure can increase hypopneas if they are central in nature.

I did a bit of googling, and, while no means thorough, what I did see about central hypos indicated it was usually part of periodic breathing patterns, like CSR... for what that's worth.

Julie wrote:Your body would not reject oxygen... you're on a completely wrong road with assumptions and someone else who understands your machine should come by soon to help out.

I didn't assume anything. And your body does in a way reject oxygen by having a central event from too much pressure but I haven't been more detailed/informed in the above post.

sorry guys but im too tired now im gonna post tomorrow

Dave5059 wrote: And your body does in a way reject oxygen by having a central event from too much pressure but I haven't been more detailed/informed in the above post.

I believe it's not a rejection of oxygen, but more being greedy about co2, which is part of the cycle that causes respiration.

I deleted my post - shouldn't have made my own assumptions - sorry.

Hi Dave5059,

Don't worry, take your time to post your infos. Sorry if it's my post that caused you a "sudden wish" to go to sleep... It's wasn't my intention.

PS Palerider, your comment about central hypos and PB is also my undertanding but the important word is "usually". When hypos are in PB it's a lot easier to assume that they are central in nature but I think it's also possible to have central hypos without a classic PB but it would be a lot harder to assume those are central with just xPAP data.

Julie wrote:No - couldn't increase anything unless other things changed. Have you been back sleeping (that often does it).

What are your pressures at?

I disagree Julie. Every time I make a change, hypopneas and centrals increase for at least a day or two, then settle down. It's probably of the reasons, I believe, that some of the others with way more experience than I recommend small changes. And of course, like you suggest, changing to sleeping on your back changes this too.