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C-Pap vs Bi-Pap
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vsheline Offline

Advisory Members

Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #21
RE: C-Pap vs Bi-Pap
(11-03-2013 10:09 PM)pdeli Wrote:  Someday this may all make sense, but for now I'm waiting for my PR Bi-Pap.
At the risk of starting off in yet another direction, I don't understand why the IPAP and the EPAP aren't always different and if so, why the Bi-Pap is not the standard? (Or was that issue already explained in terms that flew over my head?)

Fixed-pressure CPAP machines came first, meaning there was no pressure difference between inhale and exhale, except the exhale pressure tended to be at least slightly higher (which was opposite from what we wanted).

After a lot of R & D investment, bi-level CPAP machines were released which allowed IPAP to be higher than EPAP (a lot higher, like 8 or 10 or 15 cm H2O higher), but the bilevel machines were more expensive than the fixed-pressure machines. They still are more expensive, even though the hardware cost is (I think) not much different for a fixed-pressure model versus a bi-level model. The difference is mostly in the software, but the blower unit also needs to be more responsive and would be more expensive. IPAP = EPAP + Pressure Support. The PS boosts the IPAP pressure above EPAP.

Recently (within past 10 years or less) many Fixed-pressure PAP and auto-adjusting PAP machines now allow EPAP to be lowered a limited amount below IPAP, generally not more than 3 cm H2O max. This is called EPR or Flex or EZEX or whatever, although there can be differences between these, as was explained by RobySue. This is used by most patients. A minority find they do better when the pressure is the same (or nearly the same for EPAP and IPAP, so these turn down or turn off this feature. EPAP = IPAP - EPR. The EPR (or Flex or EZEX or whatever) drops the pressure EPAP below IPAP.

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 11-04-2013 02:44 AM by vsheline.)
11-04-2013 02:33 AM
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