[Pressure] BiPAP Titration Help - I:E Ratio becomes 1:5

[havishem]

Hello,

I was diagnosed with moderate OSA. I couldn't exhale much under CPAP, so I switched to using a Resmed BiPAP to treat it.

I tried VAuto (PS=4, pressure was about 8-9/4-5) yesterday night for about 3 hours and was getting many OSCAR CA flags (and 1 H flag), and on average I had a strange waveform with spaced out breathing. I switched my mode to BiPAP-S and lowered PS to 2; and set pressure to 7.4/5.4. Over 4 hours of data only 1 CA event and 1 H event. However there is some strangeness, so some questions:


   
The spaced out breathing events. First one looks like a possible collapse but the rest I am not sure. Are they collapses (so need more EPAP?) Or just CO2 being ventilated out too quickly (so lower PS?). The expiration time med reads = 3.88- something to be alarmed by?

   
Significant fluctuation between 10:45 and 11:30, and 7:45 and 8:30 (look at tidal volume). Bed position change?


Weirdness around 10:59:10. I'm guessing these are false values. I ran into my attachment limit, I can post below hopefully


   
My sleep study for reference. I have an appointment set soon with my sleep doctor so we can go over my progress.

[Sleeprider]

It would be more helpful to post the Oscar chart of daily view showing the left sidebar and charts of events, flow, pressure, flow limitation and leaks. That would allow a better comparison of the split night at PS 4 and PS 2. The left sidebar gives us your machine ID, AHI, respiratory stats and settings. We can use settings on your device to reduce CA events by changing Trigger Sensitivity from medium to high. Your charts are mostly normal and free of flow limits, with some exceptions. I think it might work out to return to Vauto mode with EPAP min 5.0, Max IPAP 10.0 PS 3.0 Trigger high.