Just got my sleep study results.  THanks to this board, I was able to understand what most of the numbers mean.  Some background:  I have moderate OSA; RDI=34 (pre-CPAP titration study); sleep efficiency of 56% (pre-CPAP titration study); O2 sats range from 96% (awake) to 92%, lowest was 89%; 66 arousals per hour of sleep.  

I'm still a little confused with my sleep architecture.  Prior to initiating CPAP, my rem latency was:
% Stage 1: 48.8
% Stage 2: 29.5
% Stage 3: 21.7
% Stage 4: 0
% Rem: 0

So it looks like I never got into stage 4.  Aren't some people with even more severe OSA able to get some REM?  

The following numbers are stats from the entire night (including the baseline period above and the CPAP trial):

% Stage 1: 35.6
% Stage 2: 32.4
% Stage 3: 9.5
% Stage 4: 0
% Rem: 22.3

So once the CPAP was initiated, I got into rem.  How did I skip stage 4?  What are the implications of all of these numbers?  I'd appreciate any help you could give me!

Is it possible that they've combined Stages 3 and 4?


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Sher

Normal sleep percentages are, give or take:

Stage 1: 5%
Stage 2: 55%
Stage3/4: 20% (yeah, we ususally combine those 2 types)
REM: 20%

Stage 1 is only a transition state, really has no quality sleep value.  A lot of it means poor quality sleep.
When you add bad sleep, it impinges on the good.
Severe SA can keep bumping you out of REM.  There are a bunch of other reasons why you could have skipped REM, including medication effect, e.g.
These are not normal architectures, but may (should) normalize with time.
sleepydave

More information is needed to simply state anything here.  First what is your age?.  In patients with normal sleep architecture the amount of stages 3 and 4 sleep we have decreases as we age.  A 60 year old may not have 20% combo of stages 3 and 4. It may be around 10-15%.  Also if you had no REM pre CPAP therapy then CPAP was added.  You now are getting the chance to recoup alot of REM this is REM rebound effect. Your perecentages of sleep stages will be off due to the large amount of REM.  The hope is that over the first couple months of CPAP use Your stages will move back towards normal with ample REM adm slow wave sleep.(stages 3 adn 4)  I hope this helped

Thanks for the help.  Just to answer your questions, I'm not on any medication and I'm 29.  I'm finally seeing my sleep specialist tonight and hopefully starting cpap soon.  Again, thanks so much for your time.