APAP is shown to calibrate as well as a sleep study, and at least in my case, it was pretty straightforward to find the right pressure by feel.
Personally, I did steps 2-4 above, got an APAP prescription valid until the end of time, and bought a new machine online. (Maybe insurance would reimburse? I didn't even bother; time is money too.)
Personally, I did steps 2-4 above, got an APAP prescription valid until the end of time, and bought a new machine online. (Maybe insurance would reimburse? I didn't even bother; time is money too.)