robysue wrote:Wulfman... wrote:
Is 6 cm. your "prescribed" pressure? Why is it so low? Do you have a copy of your sleep study?
It's been my understanding that (depending on the person) 6 cm. of pressure is probably not sufficient to expel the CO2........which sounds like what's happening to you.......you're re-breathing too much carbon dioxide and getting bad side effects. All things being equal (like your overall health condition), something in the neighborhood of 10 cm. would likely be more therapeutic.
Please cite a source for your claim that 6cm is not enough pressure "to expel the CO2". And please remember that many of us simply cannot tolerate pressures of 10cm without severe discomfort. If the OP's titrated pressure is at or close to 6cm there is no good reason to assume that bumping the pressure all the way up to 10cm will make things any better.
You also don't want to be behind the wheel of a vehicle if you're very tired.......that's not good for the health of others.
This is as true for folks who do NOT have OSA as it is for those of us with OSA. You don't have to have untreated OSA to fall asleep at the wheel.
And for a small subset of us, starting or being on xPAP
increases our daytime sleepiness significantly. I suspect the OP belongs to this group of "outliers", as do I: In the last 9 months, I have found that I've gone from having NO problems with daytime sleepiness pre-xPAP to serious, significant EDS problems with xPAP. And as a consequence? I find myself literally terrified that I will fall asleep while driving now---to the point of needing my husband to drive me to and from work about half the time now. Which is an improvement over the dark days of last fall when I became completely dependent on my hubby to drive me around because of the intense, daily, and constant EDS that developed during my first 10 days on CPAP.
WTF!?!? Please re-read my post. It's not a friggin' "CLAIM"! I didn't say it was an absolute FACT! There are "qualifiers" in what I wrote and the way I wrote it.
But, my "source" has been the posts by "Snoredog" (and others).
The subject of re-breathing or adequately expelling enough CO2 has been discussed frequently on the forum over the years.
Here.......read (some of) them for yourself. If that isn't enough, do a forum search on something like "rebreathing CO2" and see how many pages of links you'll get.
viewtopic.php?f=1&t=48664&p=444444&hili ... O2#p444444
Personally, I've never tried any pressure lower than 10 cm., so I have no personal experience with it, but I do have a Quattro mask that I've questioned as to whether it expels enough CO2 at ANY pressure I've used it with.
Den
(5) REMstar Autos w/C-Flex & (6) REMstar Pro 2 CPAPs w/C-Flex - Pressure Setting = 14 cm.
"Passover" Humidification - ResMed Ultra Mirage FF - Encore Pro w/Card Reader & MyEncore software - Chiroflow pillow
User since 05/14/05