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

Question about flow limitations
#1
Question about flow limitations
I've read several descriptions of how flow limitations are treated with EPR/PS and am somewhat confused. Would a CPAP with a pressure of 14 treat flow limitations the same as a bipap with an exhale pressure of 7 and a PS of 7? Is it just the fact that you can get a higher inhale pressure without significant discomfort with pressure support why it says that it is used to treat flow limits, or is there another mechanism by which it treats flow limits? Thanks for any responses.
Post Reply Post Reply
#2
RE: Question about flow limitations
To answer your question, no. A CPAP at 14 is providing the same pressure of 14 cm in both EPAP and IPAP. EPR (Proprietary to Resmed) only allows a whole setting from 1 to 3 cm. Using an EPR of 3 on the pressure listed above, would only provide an IPAP of 14 and an EPAP of 11. The PS of an Bi-Level CPAP allows for a greater value (up to 8 cm, I believe) in increments of .2 cm. The Bi-Level CPAP thus allows for a greater PS value at a finer resolution. Again using the mentioned values, if you set your EPAP to 7 and had a PS of 7, then you would have an IPAP pressure of 14 cm. As you can see, the CPAP would only allow the EPAP pressure to be 11, whereas the Bi-Level would allow your EPAP to be 7 cm. Remember, an EPR value is subtracted from the IPAP or Pressure value in your menu setup. a PS value is added to your EPAP pressure setting.
Crimson Nape
Apnea Board Moderator
www.ApneaBoard.com
___________________________________
Useful Links -or- When All Else Fails:
The Guide to Understanding OSCAR
OSCAR Chart Organization
Attaching Images and Files on Apnea Board
Apnea Helpful Tips

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Flow rate kink at end of exhalation ahuman 7 91 7 hours ago
Last Post: Sleeprider
  Awoken by air flow? ReclaimingMySleep 8 263 10 hours ago
Last Post: ReclaimingMySleep
  [CPAP] Adjusting for flow limitations jane2911 10 311 03-25-2024, 01:24 PM
Last Post: jane2911
  [Equipment] HELP - BIPAP-ST Restricting Inhalation/Exhalation Air Flow / Tidal Volume PAPPER101 3 113 03-24-2024, 09:29 PM
Last Post: stevew168
  flow limitations acceptable levels yankees123 27 1,613 03-23-2024, 02:41 AM
Last Post: CPAPfriend
  OSCAR flow rate assessment -- mouth leaks, palatal prolapse? manders513 9 235 03-22-2024, 06:16 PM
Last Post: BigWing
  flow rate and leak rate question sleepingbetterinFl 0 90 03-21-2024, 11:28 AM
Last Post: sleepingbetterinFl


New Posts   Today's Posts


About Apnea Board

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