Got to try three masks at 4 cm. I recognized the Swift FX nasal pillow and tried it first. The jets up the nostrils didn't bother me… in fact, I sorta liked the feeling. On inhale, I felt like I'd discovered breathing for the first time! No feeling of suffocation because I normally don't breath that easily or deeply. But I could've used more. I was a bit surprised by the resistance on exhale, even at 4 cm. Next was the Wisk nasal mask. I found it very comfortable and it sealed pretty well, despite my huge mustache. It did leak occasionally at the mustache, and I think it would be one of those I'd have to keep reseating all night. Finally, the full-face, which I think was a Quattro Air. It didn't have a chance against my full, heavy beard, even when tightened down hard. Leaked almost non-stop between where the mustache crossed under the seal and under the lower lip. So we picked the Swift FX as primary with Wisk as backup.
I planned on having a successful night. I'd followed all the rules and quit drinking coffee about 10AM. I took 6 mg of melatonin a half hour before sleep. I wasn't apprehensive or excited. I was very relaxed and didn't toss and turn. But I would get to the point of sleep with a dream just starting and then pop out of it--and I did that for hours… maybe 3 to 4. I was constantly aware of my surroundings in the totally dark room. I stayed relaxed and didn't let that get me upset, and eventually, I did get to sleep in the last half of the night. Never had to get up to go to the restroom.
At wake up, I found out, yes, I definitely have sleep apnea. My wife's observation that I snore like an orchestra and stop breathing frequently, even on my side, was confirmed. My oxygen level got down in the low 80s at the start of the night and I hit a low of 73 in the last half. But she said I always bounced back into the 90s. There was no time left to do the titration.
The insurance approved two visits, so even though my doctor said he could titrate me on an auto, I'll choose to go back to the center for titration. It was a fun and interesting experience (except for the gunk in my hair).