Clear airway index

I checked the sleepyhead software today since it has been 2 days I got AHI=0. Just wondering if that is true or not. My AHI usually with average of 0.65 for the last 4 months. But I found out I have a lot of AHI only due to the "Clear Airway Index". I read a post from here says it's the same as central apnea" in the Resmed machine. My doctor mentioned it may caused by the machine itself before. I have problem to stay in sleep whole night long. I wake up after 2, or 3 hours a few times at night. 4 hours will be my best time. Is that could be caused by the "clear airway" problem? But even the night without the clear airway index, I still can't stay in sleep. Is something I need to worry about this?

If your AHI averages .65...you do not have a problem with CAs. CA's can occure when you stop breathing for 10+ seconds and there is no blockage. They are common when you are restless before falling asleep and before getting up.

If you have a few CAs when going to sleep or just before waking, those are nothing to worry about. If you have a lot and all night long, then that may be too many, but without seeing some Sleepyhead graphs it's hard to say... can you post something?

Random centrals aren't a problem and if your AHI is less than 1 then you aren't having more than a random here or there.
It's normal to have an occasion "real" central....like a sleep onset or sleep stage transition.
So when you wake in the night the central you see flagged could maybe be a sleep onset central when you go back to sleep.
Or maybe it isn't eave a "real" central and instead is just a reflection of awake/semi awake breathing irregularities getting flagged by mistake.
Or maybe it's just a case of you turning over in bed and holding your breath for a few seconds.

Could random lone central be the cause of your wake ups? More likely the wake up is the cause of the central. Especially since you say that you have the wake ups even when no centrals are flagged.

Trouble staying asleep where we wake more often than we want and maybe have trouble going back to sleep is called sleep maintenance insomnia and you might google it and read up on it.

It's normal for us to wake after a REM stage..most of the time we don't remember it and we just roll over and go back to sleep until the next REM ends.
You might also google sleep stage hypnograms and look at the hypnograms to see how the sleep stages progress during the night. See if the time frame seems to correlate to a REM stage.

https://sleep.tnet.com/reference/tips/imgur

How to post images using imgur.

xxyzx wrote:

mibbim wrote:I checked the sleepyhead software today since it has been 2 days I got AHI=0. Just wondering if that is true or not. My AHI usually with average of 0.65 for the last 4 months. But I found out I have a lot of AHI only due to the "Clear Airway Index". I read a post from here says it's the same as central apnea" in the Resmed machine. My doctor mentioned it may caused by the machine itself before. I have problem to stay in sleep whole night long. I wake up after 2, or 3 hours a few times at night. 4 hours will be my best time. Is that could be caused by the "clear airway" problem? But even the night without the clear airway index, I still can't stay in sleep. Is something I need to worry about this?

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only if you dont feel good are tired and have headaches

the machine can cause centrals
the only need to worry is when the O2 goes too low for too long

not being able to sleep has many causes
there may be other reasons you cant sleep for a long time

The machine reports centrals. In some cases too high a pressure setting can cause centrals.