(06-20-2013, 06:40 AM)markrb Wrote: I am really worried about having a panic attack and being able to breathe out easily when awake is extremely important to me.
(06-20-2013, 05:13 PM)zonk Wrote: EPR drop pressure as you exhale, some find breathing out at lower pressure more comfortable
Pressure drop determined by what setting chosen from 3 setting levels
Setting 1 ... drop pressure by 1 cm
Setting 2 ... drop pressure by 2 cm
Setting 3 ... drop pressure by 3 cm
EPR does not drop pressure below 4 regardless of the setting
Hi markrb, welcome to the forum!
Many people find the easiest machines to breath out against are the bi-level machines which can lower the pressure as much as 10 (cmH2O) whenever you are exhaling. As Zonk mentioned, ResMed EPR (and Philips Respironics C-flex and A-flex) can only be adjusted to relieve the pressure as much as 3. Often, people prefer a difference between their inhale pressure versus their exhale pressure of 4 or 5 or more, which would require a bi-level machine.
So a bi-level Auto machine may be perfect, but they are more expensive and I think insurance will usually not cover bi-level machines unless you have first tried to use a non-bilevel CPAP or APAP and were not able to be "compliant" (not able to get used to it), and/or you have a fairly high pressure prescription, like 15 (cmH2O) or higher.
Both ResMed and Philips Respironics make great bi-level auto-titrating machines (ResMed VPAP Auto or Philips Respironics BiPAP Auto with Bi-flex).
Below the bi-level class of machines are the APAP machines like the ResMed AutoSet or Philips Respironics System One Auto), but ResMed EPR is more comfortable than Philips Respironics A-flex (used with APAP machines) or Philips Respironics C-flex (used with CPAP machines).
Unlike bi-level machines and unlike ResMed EPR, Philips Respironics A-flex and C-flex both return to high pressure WELL BEFORE you finish exhaling. Philips Respironics bilevel machines using Bi-flex, however, are different and (like ResMed machines) let you finish exhaling completely before raising the pressure again.
Some have reported that they found a ResMed machine too noisy and switched to a Philips Respironics machine which was much quieter. From reading different posts, I have received the impression that about half the new ResMed S9 series units are always very quiet, and the other half are very quiet at some pressures but have a slight wheeze or whistle at other pressures.