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Question about flow limitations
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09-11-2021, 12:26 PM
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.
09-11-2021, 02:26 PM
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
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