AHI registered when not asleep?

Hi folks,

'new to all this and had a quick question. Here's the situation; laying in bed at night with my machine on for an hour or so. Get up to go to the bathroom and hit stop. When I look at the sleep results screen, it says I've registered 15 AHI events in that time I was laying there awake! What is it picking up on? I've been awake so know I didn't stop breathing. Makes me question the accuracy of the machine.

Mask leak tests are good fwiw.

Machine doesn't know if you are awake or sleeping. It just tracks your breathing and air flow.. Evidently you have very irregular breathing while awake. It doesn't take much to stop breathing for 10 seconds. If you look at the data, the events reported during that period are probably Centrals or Clear Airway events. I'm sure the machine is fine.

What is reported could be either hypopneas or actual apneas as was suggested.
Breathing patterns while actually awake are very different than while sleeping and that is all the machine can measure.
The time during the transition between being awake and being asleep is a time when significant breathing instability can occur.
In a sleep study, this period is identified by the EEG recording and any AHI events are ignored. That is what you have here.

And you might well have drifted off a few times without realizing it - happens all the time and people swear they were awake, but...

Breathing while awake looks like crap.
But most of the alternatives are worse.
Just keep doing it until you fall asleep.
It evens out.

Julie wrote: ↑

Fri Feb 23, 2018 4:56 am

And you might well have drifted off a few times without realizing it - happens all the time and people swear they were awake, but...

That's what I think too! You really were asleep. Most people do not have episodes that look like obstructive events while awake.