New to AutoPAP, been on CPAP for over a decade, though.
My understanding: Give it a minimum and maximum range. Machine will adjust pressure within that range to maintain the "sweet spot".
How does the algorithm seem to work? When does it decide it's found the best setting? Does it adjust upward until it stops sensing improvements over a certain period of time and stop? Or does it adjust until it reaches some AHI target value and then stop? Or is there another way?
10-10-2016, 10:53 AM
(This post was last modified: 10-10-2016, 10:53 AM by bernerbits.)
For me it seems to try and analyze my flow rate to predict events, and try different techniques to stop them. Sometimes it will sit at the lowest pressure and periodically spike the pressure before returning to minimum. Other times it will actually raise the pressure a bit and stay there for a while.
I am not a PR expert by any means since I have only used Resmed. Generally the autos increase pressure when they encounter apneas, flow restrictions, or snores. They will increase pressure until they no longer sense any of the foregoing. If no more reason they wil reduce the pressure until they detect one of the aforementioned apnea events or precursors. For the Respironics machines-if the machine has found a happy place pressurewise for a while it will temporarily increase the pressure to see if it makes any improvement and then drop back if it does not. If it is at a high pressure, it will the same thing in reverse. That is, it will drop the pressure slightly to see if things get worse. If they do, it will raise the pressure back up.
That is a crappy, oversimplified explanation of generally how autos work.