Stage shifts????

Limestone · Post by **Limestone** » Thu Feb 22, 2007 2:08 pm

I am going over my PSG's and have a few questions about Stage shifts.The PSG's are almost 10 yrs apart,the first inicating 74 stage changes and the most recent shows 79.Both results both show a total of zero stage 3 and 4.
What is a common(healthy )number of stage shifts?And how do you manage/improve this?

Sleepy-eyes · Post by **Sleepy-eyes** » Thu Feb 22, 2007 9:53 pm

Okay, Limestone, I'll bite! What is a PSG, and what is a stage shift. I've never heard either term.

blarg · Post by **blarg** » Thu Feb 22, 2007 10:08 pm

Sleepy-eyes wrote:Okay, Limestone, I'll bite! What is a PSG, and what is a stage shift. I've never heard either term.

PSG = PolySomnoGraph (or Polysomnogram depending on who you ask). It's a sleep study.
Stage shift = A change in sleep stages. There are 5 stages of sleep: 1 through 4 and REM.

A normal night should look like this:

Many people have trouble getting down to stage 3 and 4, especially in a sleep lab setting where you're in a strange place with wires all over the place and most likely an uncomfortable bed.

Sleepy-eyes · Post by **Sleepy-eyes** » Fri Feb 23, 2007 7:33 am

Who says ya can't teach an old bird new tricks? Thanks. Just never heard those terms before.

Limestone · Post by **Limestone** » Fri Feb 23, 2007 7:07 pm

Chris,

Sorry for the confusion,I was just copying what was on the report.Most of this stuff is as clear as mud for me and it was not intended to shock and amaze.

I am finding that this is a tough question and am hoping the answer lies with the experiences of our fellow hose heads and may offer me some improvement in my results.

Bill

StillAnotherGuest · Post by **StillAnotherGuest** » Sat Feb 24, 2007 6:01 am

Stage changes normally occur at a rate of about 7 per hour of sleep. Abnormal stage changes can be addressed by identifying and correcting the arousal or awakening that caused them.
SAG

rested gal · Post by **rested gal** » Sat Feb 24, 2007 9:50 am

SAG ("StillAnotherGuest" on this board, aka "sleepydave" on that other board) said same thing plus a little more about "arousals" over there:

http://www.apneasupport.org/viewtopic.php?p=27820

"Stage changes occur normally (not caused by arousal) about 7 times per hour, 40-50 times per night in a "normal" night's sleep, perhaps a few more in the first 90 minute sleep cycle, let's say 11 and maybe a few more after that due to "lab effect". I've seen the number 70-75 stage changes as "normal" during a first-night sleep study.

An arousal will often cause a stage change, but that's not a requirement, and there's plenty of cases where that won't happen, so you can have a bunch of arousals not reflected in the stage changes."

sleepydave = StillAnotherGuest (SAG) = Muffy = NotMuffy
for new readers who are trying to keep up with him!

Stage shifts????

Stage shifts????

Generally, About...