I recently saw my ENT (ear, nose & throat) doctor for a seasonal allergy problem. She recommended one of the 'over-the-counter' brand of antihistamine - not a decongestant, just the antihistamine. I've noticed since I've been using it that my AHI is lower now than it was. It is my understanding that it should be under 5. Mine are now anywhere between 0.5 and 2.8.
I've also noticed that under the AHI number which might be 0.8 that there is also a 'central' number which today was 0.2. My sleep doctor never explained what the central number meant and I am curious. Is it something I need to be concerned about?
I use the S9 Autoset with the AirFit P10 mask.
I assume you never had CAs until recently? How long ago did you start taking the Antihistamine? It could be that your body is getting so much oxygen compared to what it was that it just forgets to breathe sometimes. .2 is not really what I personally consider significant. "Central" is Central Apnea or CA. This is not an obstruction to being able to breathe just simply NOT breathing. Basically your brain "forgets" to send the signal to the rest of the body to take a breath. It can be serious if you have a bunch of them, but it sounds like you do not. It could be that these will disappear completely once your body gets used to the new drug. It might be wise to keep an eye on those and say something to your sleep doc if you start having a bunch of them though!
As always, YMMV! You do not have to agree or disagree, I am not a professional so my mental meanderings are simply recollections of things from my own life.
PRS1 - Auto - A-Flex x2 - 12.50 - 20 - Humid x2 - Swift FX
short answer: Central apneas are included in the AHI so as long as the AHI remains below 5, all is good.
Long answer: Central Apnea (CA) is where the airway is open but the brain, for various reasons, doesn't think you need to breathe. There's no snoring, no struggle, no nothing. Eventually, the brain gets better messages and you start to breathe again. Sometimes it is due to the blood chemistry being a little off or the brain thinking it is off. It sounds extremely frightening BUT as long as those numbers stay below 5, all is well.
I typically have central events each night, sometimes I have more of them than I do obstructive events. Their number stays low and my overall AHI rarely goes over 3.5 so I'm not concerned at all.
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Breathe deeply and count to zen.
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