Is 2 hours of sleep a requirment to wear the PAP in a study?

[Madalot]

technically be lightly asleep but awake at the same time.

you can't. but you you can be awake, then asleep, then awake, then asleep, and only REMEMBER the awake part.

I'll vouch for this. I have had times where I KNEW, without any doubt whatsoever, with every fiber of my being, that I was AWAKE, but my husband said "No, honey, you were sleeping. You were SNORING up a storm! I just woke you up!!!!"

And because *I* can't argue with logic and reason, I accepted that I *thought* I was awake, but had dozed off and didn't remember being asleep.

[palerider]

technically be lightly asleep but awake at the same time.

you can't. but you you can be awake, then asleep, then awake, then asleep, and only REMEMBER the awake part.

I'll vouch for this. I have had times where I KNEW, without any doubt whatsoever, with every fiber of my being, that I was AWAKE, but my husband said "No, honey, you were sleeping. You were SNORING up a storm! I just woke you up!!!!"

And because *I* can't argue with logic and reason, I accepted that I *thought* I was awake, but had dozed off and didn't remember being asleep.

same thing has happened to me, before cpap, watching tv with friends, who'd then ras me about being 'bobble headed' and snoring, and I'd swear up and down that I was awake the whole time... though sometimes I'd close my eyes, and my brain would stitch together the bits of the show I was getting and I'd think I saw the whole thing.

only, going back and rewatching the episode, there were parts I didn't remember, because, no matter how much I thought I was awake...

I WASN'T.

[zoocrewphoto]

And because *I* can't argue with logic and reason, I accepted that I *thought* I was awake, but had dozed off and didn't remember being asleep.

I sleep with the tv on. The past few nights, I have been tossing and turning, awake a lot, due to a horrible cough and sore throat. I felt like I was awake for two nights, but I know I missed huge gaps in tv programs, some completely. So, there is proof that I slept, even if it wasn't well.

I have also woken myself up with snoring on many occasions when I was sitting in a recliner watching tv. I felt like I was awake, but I know I don't snore when I am awake, and I heard the snoring (that's what woke me), so again, proof that I did fall asleep.

I also had one bad scare when driving. It was a really long day, and a 3 hour drive home in the dark. I was about half an hour from home, and I was tired. I took an exit, and I was looking for a parking lot to pull into. I rubbed a tire on the curb, startling myself. I had not realized I was drifting into the curb. I found a parking lot, took a nap, and finished the drive more awake. But it scared me. I knew I was tired and needed a nap (was looking for a safe place to park), but even then, I didn't realize just how tired I was.

I have a friend who totalled her vehicle about 10 years ago by falling asleep while driving. She woke up a ditch. She told me me later that she didn't even feel tired. Our perceptions are not completely accurate. Sometimes we have to go by the evidence, not our perception. For example, she didn't feel tired, but she woke up in a ditch. Clearly, she fell asleep.

[Jeff241]

Is there a rule in every split study that the patient must be asleep for 2 hours total before he gets to wear the CPAP mask?

Nope I had 84 minutes for the full night and was put on CPAP in the middle of the night.
I was surprised I even slept, it felt like I was awake the full time. The worst night of sleep I've ever had.
But I saw my report, yep I was asleep and I had OSA.

[zoocrewphoto]

I was told in advance of my sleep study that it would probably be a split night study. If I met the criteria before a certain time, they would split the study. I was also told that I was not to ask the tech questions about results as they would not be allowed to answer them.

That night, the sleep tech fitted for me for a mask, and had me use for about 10 minutes before going to bed. That way, it would not be a shock in the middle of the night. I had one bathroom trip during the diagnosis phase. After about 2 1/2 hours, the tech gently woke me and said she had enough data. She sent me to the bathroom, then put the mask on me. In the morning, I did ask one question. Did the pressure change during the study? Yes. Cool. I didn't notice a thing

I knew going in that I had sleep apnea. Considering that she woke me and put me on a machine, I knew I had met the criteria for sleep apnea early in the night. It wasn't until the followup with the doctor that I learned how severe it is. 79 events per hour! And in all likelihood, it would have been higher had it gone all night. Why? More time for more back sleeping. And I never made REM sleep. Most people are worse in REM sleep, and I do reach REM sleep, just not that early in the night without cpap. But, when you are that severe, does it really matter to know just how much more severe you are?

I really appreciated having the split night study. I was able to get it all done in one night. The titration was spot on, and I got a great machine and therapy as a result.