A problem with the machine or a very strange breathing pattern?

[dark]

In the last two weeks I've noticed two events that I can't explain. The first one was on 2020-01-07:
   
And the second one was on 2020-01-18:
   
Is there a problem with the machine or it's something else?

[Osiris357]

Welcome to the forum. I’ve never encountered your machine before but I don’t think you stopped breathing for that long and I’m not sure what some of those event mean. The experts in here may be able to help you. They should be around soon. It’s still 8 o’clock on the east coast of the states so it may take a little while till they come across your post. 

From what I see your machine may be at fault but that purely a guess. Hope you find the answer. Someone will be around shortly to help you.

[ApneaQuestions]

I've never seen one of these machines.
However, what exactly are you referring to?

There is something "too regular" with the leak waveforms in my mind. They repeat almost exactly.
Also the flow rates disappear then become large amplitude then disappear again.
Is that what you are talking about?

If that IS what you mean then (as a random guess) I'd wonder if the circuitry or a pressure sensor was failing.
That's total speculation.

[Gideon]

I can't say why the Flow Rate signal dropped out.  We have seen similar with a bad SD card in the past, not on your machine.

You have an excessive amount of flow limits in both of these charts.  
Can you increase the difference between the exhale and inhale pressures?

[Sleeprider]

I suspect a bad flow sensor. The tidal volume of nearly 40K is impossible, and it just looks like two different scales here. We don't have a lot of experience with Weinmann machines on OSCAR, and I would like to see the same chart on the SomnoSoft software to compare results. It's possible this is an artifact within OSCAR, so without seeing the manufacturer graphs or statistics to compare against, I'm reluctant to identify a cause.