I am a complete newb on the forum and to OSA, with just 7 nights on the blower and only just yesterday found out from a poster here how to show leak and AHI data on the screen (very annoying that this wasn't already set up). Where would I be (already) without this forum?
My initial overnight eval showed AHI 17.5, of which 11.5 was in non-REM and 45.5 was in REM (shock!), so I'm much like you in this it seems. Also, I had severe desats almost exclusively in REM, down to 6.9 at the extreme - ouch. All this and I was resisting getting the blasted evaluation because I was so darned sure I didn't have OSA; I only got the eval done because my GI doc recommended it (respiratory depression when put under with i.v. fentanyl + Midazolam for colonoscopy) and the FAA Medical people insisted on it (to let me continue to fly a light aircraft) when they saw his report.
Imagine my surprise .....
I didn't have another overnight session, just went straight on the APAP set wide open (4 to 16). After I figured out how to view the data on the screen, I now know that my averages over the first 6 nights were as follows: 90% press. 7.1, AHI 6.5, Leak 41. My first 1-night reading (last night) was 90% press.8.0, AHI 5.5, Leak 27.5. I'll keep taking them of course and will learn more before I see the doc and get the full data set.
I knew there was some leaking going on but I've jiggered the nasal cushion and mostly have that licked I think (but it's hard to tell without the real data of course). 27.5 is about where it should be on the graph. I feel that AHI of 5.5 is still too high but I'm speculating of course without other data including O2 levels.
Symptomatic improvement was wonderful the first few days (night sweats gone completely, morning headache gone completely, less nocturia, started remembering vivid dreams again, much more energy altogether, better concentration/focus etc .....) but I still notice occasional mild headaches and feel that I need to get the AHI lower. I suspect that I'm still having some O2 drops esp. in REM, it's clearly where I run into problems.
I haven't even seen the sleep doc yet since going on the machine (see him in 2 weeks to review the data) so maybe I'm getting ahead of myself but I'm planning to get the card reader + software and probably a recording oximeter as well because of the hypoxia. I'm a translational research scientist in pharma so analyzing data is what I do all day - might as well look at some of my own for a change ..
I know I've had this condition for years (off and on) looking back on it, and feel like an idiot for not thinking of OSA as a possible explanation for my symptoms. It's in the family but I'm not overweight and never used to wake up with breathing problems ..... I know I know, don't tell me. So far in denial was I when I first visited my sleep doc that I openly told him I don't have the symptoms and was only in his office because of FAA's insistence - I was that
sure I was a false positive in the i.v. sedation "test".
*smilie with egg on face here*
The irony is that I spend much of my time evaluating biomarker data (anticancer drug development) to see how well the numbers predict clinical outcome (time to tumor progression, overall survival, best overall tumor response, etc), and analyze data using ROC curves and contingency tables to come up with positive and negative predictive values, test sensitivity, test specificity, accuracy and Fisher's exact p values. Bit of a joke really, but I don't care coz I feel soooo much better.
A heartfelt thanks to all those patient cpaptalk posters willing to share their exerience and knowledge with newbs like me.