Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account

New Posts   Today's Posts

Lowering EPAP makes CA's skyrocket
Lowering EPAP makes CA's skyrocket
A few weeks ago, I lowered the EPAP settings and just noticed the results. Ugg, the CA events have rocketed up to an average/hour of about 10-12 events from 1-2 events previously.

It's currently: EPAP 7-8 / IPAP 11-12
Was previously: EPAP 9.5 / IPAP 11-12.5

I'm so curious as to why a drop in EPAP pressure would contribute so significantly to just the # of CA's (without much change in OA's, etc.).

(Sorry if this is such an obvious answer.)
Sleep Apnea has given me a terrible memory. Please forgive me if I've repeated myself.
Post Reply Post Reply

Donate to Apnea Board  
RE: Lowering EPAP makes CA's skyrocket
You have increased your pressure support (since IPAP is nearly same while EPAP is down). This sometimes lead to increased washout of CO2. This means your End Tidal CO2 goes down. This reduces your drive to breathe. This means you forget to breathe for a few extra seconds until that co2 bounces back to normal. That forgotten breath is recorded as an Clear Airway Apnea.

If reducing EPAP has not introduced any obstructive events then lowering it was a right decision. But you should keep pressure support constant to begin with. If your H events or RERA events increase, then increase PS but not otherwise. It may increase CAs like it did in your case.
PRS1 Auto & Dreamstation Auto w/ P10 and straight pressure of 7cm. 
Post Reply Post Reply

Possibly Related Threads...
Thread Author Replies Views Last Post
  School Me - EPR (EPAP) & Flow Limitations 70sSanO 20 669 01-26-2020, 05:48 PM
Last Post: sleepyp
  Scuba diving makes it easier to adapt to CPAP mask? hearsay73 16 779 01-21-2020, 11:34 AM
Last Post: farnsy
  EPAP (expel pressure) help! berkberk 15 526 01-18-2020, 11:28 PM
Last Post: Sleeprider
  [Pressure] Difference between EPAP set pressure and operational pressure brugerard 8 261 01-02-2020, 10:03 PM
Last Post: brugerard
  25sec CA makes SpO2 drop to 85% MyronH 0 131 12-21-2019, 12:39 PM
Last Post: MyronH
  Dreamstation Auto SV VS Resmed Aircurve 10 ASV auto EPAP RLSdss 3 234 12-20-2019, 09:54 AM
Last Post: SarcasticDave94
  Help with mask, Definition of EPAP/IPAP and Mask Pressure wesozzzz 1 187 11-15-2019, 07:57 PM
Last Post: Sleepster

New Posts   Today's Posts

About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.