40 second OA reported in OSCAR - can that be right?

[shenstone]

So I have a suspected UARS diagnosis and I am being treated on a AirCurve 10 VAuto. When I checked my OSCAR graph this morning I noticed that I had 2x 40 second obstructive apneas last night. I know the definition of an OA is normally 10+ seconds where you stop breathing but surely 40+ seconds is in a category all of its own?

Taking a look at the past couple of weeks of history I can't seem to find any similar OAs that last quite this long so I'm hoping this is just a one off. I'm also a little concerned about how long the machine took to respond to increase the pressure to compensate.

I'm hoping this is some kind of reporting error from the machine/OSCAR but if its not I'd really appreciate some suggestions as to how I can prevent these from happening again.

I've attached the two concerning OAs and a full night shown in OSCAR.

Thank you!

[newuser1002]

Feel free to take a look at my thread, seems somewhat similar to yours

[Sleeprider]

We have two events here that are preceeded by different respiratory patterns. Neither one shows flow limitation or obstruction. In the obstructive event at 00"34:40, there is somewhat irregular respiration with what appears to be swallows or pauses in the expiratory cycle and pressure is at the minimum EPAP of 7.0. The conclusion of the event shows minor recovery breathing and relatively fast recovery to normal respiration with no indication of flow limit or airway obstruction and pressure rises to about 8.5. The second event starts with pressure at about 8.0 and there appears to be an obstructed inspiration just before the blue shading appears. There is an arousal and again a brief recovery breathing which leads into what appears to be a sleep-pattern of breathing, possibly REM with pressure over 9-cm.

There is nothing here to suggest a positional cause for the obstruction, and the events, while moderately long, did not cause significant distress. My best guess is you were experiencing a transition to a different level of sleep in both cases, as indicated by the changes in respiratory pattern. It's possible movement was involved. It's understandable that a 40 second breathing cessation may be alarming, but it's impact on your breathing demand and sleep state looks minimal. Based on the fact these seem to be infrequent and unrelated to PAP pressure, I have nothing to suggest as a cause or changes to your therapy to prevent this. Your therapy looks otherwise excellent. I hope you sleep well tonight and don't see a frequent recurrence of these longer OA events.