(03-31-2014, 02:22 PM)zonk Wrote: From my limited experience, AHI is always lower on AutoSet mode and more significantly no central apnea, while higher AHI and few centrals apnea on CPAP mode.Like so many things in PAP therapy, there's a big variation from user to user. I based my original comments on what I've seen in both this and other forums in both my data and others.
For me: Fixed pressure will give me excellent AHI results---if the pressure is set high enough. For my BiPAP, that means running with a fixed IPAP = 8 and a fixed EPAP = 6. And my stomach is deeply uncomfortable at those pressures. So in my case, I sleep better and feel better with a tight Auto BiPAP range, even though the AHI numbers are not as good. (There is a point of diminishing returns when it comes to AHI numbers---many of us feel equally good with a long term AHI in the 1.5-2.5 range as we do with a long term AHI in the 0.0-1.0 range.)