I've been experimenting with BIPAP in an attempt to help with Aerophagia. I initially set the Resmed S10 Vauto to about the same settings as I was using on the DreamStation.
9.5 fixed Aflex 1
This provided an IPAP of 9.5 and a sort of EPAP of 8.0 for me with my breathing pattern.
on the Resmed I set:
IPAP 9.6
EPAP 8.0
Trigger: High
Cycle: Low
TiMax: 2.3
TiMin: .3
EasyBreath: On
These were after experimenting for comfort. There is nothing scientific about my choice.
Great results numbers wise with zero AHI where the DreamStation was consistently 1.75 no difference with Aerophagia and still flat inhale tops on the flow wave chart. Last night I started to bump things around and raise IPAP to 10.0 everything else the same. Good news no increase in Aerophagia and still low AHI of Around .7 A few CA but they were also just after a series of large breaths so may have been after a momentary awakening.
Strange news, in the attached screen shot which is zoomed in I have picked up a small bump right at the zero line at the end of exhalation. I think I can actually feel this when awake but not sure if it correlates. Additionally, with the DreamStation my I:E ratio was inverted (Longer Inhale than Exhale) but with the Resmed it is now correct but seems large. I have read some other threads on here, Thanks Sleepster Walla Walla OpalRose and all the others, talking about some people doing better with the Resmed algo Vs. the DreamStation Aflex and I might be one of those.
Before I make additional changes I wanted to get some feedback on the anomaly if it is one that I have circled in the attachment. Maybe some suggestions and the other settings as well. My plan is to start decreasing EPAP when stable on my current settings to reduce the Aerophagia.
Supplier #1 had an interesting article on using this technique recently to help with Aerophagia so I brought it up with my sleep doc. He's on board so I decided to give it a try. I have also felt that I've needed more IPAP but could never do this with the DreamStation.
Any thoughts would be greatly appreciated.
GuppyDRV