Hi verbatim. It looks like you're doing very well. It's normal to have a period in the night where your pressure requirements are lots higher. I'm not entirely sure why - I think it's because of the phase of sleep you're in or sometimes it can be your body position, or a combination of the two.
Most of us have more apneas if we're sleeping on our backs. So if you are lying on your back and also go into very deep sleep, that can cause your airway muscles to relax even more than other times of the night, and the pressure increases when you start having apnea events.
You've probably heard of the "attach a tennis ball to your back" method of keeping you from sleeping on your back. If you have more lots more apneas while sleeping on your back, figuring out a way not to sleep in that position would decrease your pressure needs.
I think that's probably really only necessary if you're having leaks and are trying to stop them without using a chin strap or full face mask.
Be sure to keep an eye on your leaks graph. I saw one float by somewhere when I was looking at your screenshots just now, and it looked very good. It's the lower trace on the graph that you want to worry about. The upper trace includes the vent from the front of your mask.
Regarding your tongue preventing leaks, keeping your mouth closed will do the job, too, when you're awake, but when the air is pressurized slightly, as with APAP, if you relax the tongue "block", air will usually start to leak from your lips if you relax them. Your lips will flutter like a fish breathing.
I used to scuba dive many years ago, and I agree that xPAP use is pretty mild compared to that. It's much quieter, and you don't have to put the mask in your mouth.
From looking at your graphs, I find it hard to imagine that you wouldn't end up with an APAP machine, since your pressure needs are so different at different parts of the night.
I'm not entirely sure why your pressure didn't increase even more than it did, since I can see flow limitations recorded. That's when a decrease in your breath is detected, but it doesn't progress far enough to become a hypopnea or apnea.
A flow limitation looks like a flatness or dip in a breath waveform. If the top of the breath waveform is squiggly, that indicates snoring on inhalation.
I would recommend keeping an eye on your graphs during your test period to be sure you're not having large leaks and to be sure that your pressure isn't needing to go higher than 20.
I think your minimum pressure looks good.
Oh, humidity. Most people who post on this board do use a humidifier. A few don't. If the air you're breathing at night doesn't feel too dry and if you're not waking up with dried-out nasal passages, then you're probably okay.
I'm guessing that when you get your own machine that it will have a heated humidifier that can be turned on or off.
Most people do use humidification at least during the winter. If you look up photos of the PR (Philips Respironics) machines, the ones with humidifier have a rectangular shape as opposed to a square shape.
It looks like things are going really well for you. It took me around three months to get to where you are.
(05-22-2016 01:50 PM)verbatim1 Wrote:
(05-22-2016 12:26 PM)green wings Wrote: When the sleep tech said that most people are nose breathers, maybe she meant that they primarily inhale through their nose. When you are wearing a mask that doesn't cover the mouth, you keep air from escaping from your mouth by blocking your airway with your tongue. When we get into really deep sleep, sometimes our muscles relax and this tongue "block" may let air escape.
That is very interesting!
I would have thought that we keep our mouth CLOSED which would prevent air from coming out. You're saying it's the tongue. Interesting. Thanks for that tidbit!
(05-22-2016 12:26 PM)green wings Wrote: That can vary from just a tiny bit escaping from time to time (which I believe will look like the "expiratory mouth breathing" graph) to letting so much air rush out of our mouth that it shows up as a large leak. You may want to do a search about what large leaks of air from your mouth do to the effectiveness of your therapy.
Looking for evidence of these "leaks", I see around midnight last night that everything went through the roof. Pressure. Leaks. etc.
Is this midnight graph below indicative of what you're talking about?
Here is a zoomed in graph of the same thing:
(05-22-2016 12:26 PM)green wings Wrote: If you wake up with a very dry mouth, that's a sign that you're probably doing quite a bit of mouth breathing.
Interesting. I don't recall my mouth being dry, but I will look for that.
There is no humidifier.
(05-22-2016 12:26 PM)green wings Wrote: I'm not clear about whether some people also inhale through their mouths all the time (unless there's lots of nasal congestion).
Unless I'm sick, generally my nose is not stuffy.
(05-22-2016 12:26 PM)green wings Wrote: A "full face" mask covers your mouth as well as your nose, so if you exhale through your mouth, the air doesn't leave the pressurized system of the xPAP machine, tubing, mask, and you. (Full face mask doesn't mean it covers your eyes.)
I gathered this but thanks for the clarification.
(05-22-2016 12:26 PM)green wings Wrote: Another interesting graph is the pressure graph. You can look at events and see how the machine's algorithm varies the pressure in response. (You'll want to look at the flow limitation graph in addition to the events graph if you're doing this.)
Thanks for that advice to look at the pressure and flow limitation graph.
There is a LOT of data in those graphs.
Here is the pressure & flow overnight last night:
And here it is zoomed in at midnight:
Both vary a tremendous amount it seems!