BiFlex or Not?

[holden4th]

Now that I'm back from my UK trip I'm going to purchase a back up machine. As I'm interested to see if BiPAP can resolve my RERA issues and also help my breathing patterns my next machine will be a Respironics. The machine I'm looking at is the DS760. I notice this has something called BiFlex which I'm assuming is similar to the AFlex on my current machine. As I will be setting an EPAP level on a BiPAP machine, I'm not sure how lowering the exhalation pressure even further using BiFlex is useful.

[Sleeprider]

BiFlex does not change the pressure support, it changes the rise time and reduction curve from a square wave to a rounded wave. Sorry for the translation issue here but BiFlex looks like the figure below.

[dcg494]

BiFlex does not change the pressure support, it changes the rise time and reduction curve from a square wave to a rounded wave.   Sorry for the translation issue here but BiFlex looks like the figure below.  

Hope it's ok to dig up an old post rather than start a new one. I have the same question as the poster about bi-flex. I'm wondering if the bi-flex adds additional PS to the PS = IPAP-EPAP.

The graph seems to indicate that.

The blue line, the box form pressure wave is the normal bi-level without bi-flex. The purple line is with bi-flex and the low-point of the EPAP goes below the box, i.e. seems to add a bit of extra PS ? 

Would be helpful to find an answer to this, as I'm moving from CPAP to BPAP and trying to figure out exactly what EPAP I require. 

PS: Sleepyhead seems to confirm what you're saying Sleeprider, that bi-flex doesn't reduce EPAP by more than the set PS, but I doubt SH's accuracy. SH doesn't seem to pick up on the bi-flex setting as it did w the CPAP (i.e. there's no indication whether bi-flex was on and at what level).

[silentsnore]

Actually, if I understand it correctly, on the exhale side it reduces a pressure a bit initially...