ozij wrote: ↑Wed May 31, 2023 8:54 pm
The sudden increase in pressure is not surprising
from the machine's point of view
Look at 23:48 :
There's some heavy erratic breathing just before that.
Then - according to the machine - a
long period of non-breathing, identified as an obstructive apnea when it ended.
After that supposedly obstructive apnea, the pressure shoots up, and then the leak is huge.
Now, I don't think that "breathing stop" was an apnea - if you click on the "events" tab, you'll see when this supposed apnea started and how long it was really was. On the chart it looks like it was almost 2 minutes!
I think what happened is the following:
23:46 - you may have changed position, a leak started. The leak bothered you, you fiddled with the mask.
While you were fiddling with the mask, you may have pulled it away from your face. During that period, the machine didn't recognize you were breathing - so once it saw you breathing again, it shot the pressure up.
Automatic machines don't try to "plow through" obstructive apneas, they will only raise the pressure after they recognize a resumption of breathing.
For the sake of troubleshooting, I'd put the machine on CPAP - to keep it from responding to misinterpreted breathing events.
And if it were me, I'd put the pressure at 7.2, not more for the first night of troubleshooting.
Putting the machine on CPAP will also help you learn to distinguish between a leak and a rise in pressure.
You can always switch the machine over the APAP if that turns out to be necessary.