Need help with ordering a machine

I have enabled mask fit on my 550. When I hit the ramp button, the machine blows at full APAP pressure a couple of breaths then lowers the pressure until it hits bottom and goes streight into therapy mode. This is a feature I like a lot and use often.

The machine will only stay at the max pressure for a very short while, but I have found a little trick, if I hold my breath, that time is extended long enough to be useful

Burkebang wrote:I have enabled mask fit on my 550. When I hit the ramp button, the machine blows at full APAP pressure a couple of breaths then lowers the pressure until it hits bottom and goes streight into therapy mode. This is a feature I like a lot and use often.

The machine will only stay at the max pressure for a very short while, but I have found a little trick, if I hold my breath, that time is extended long enough to be useful

Hrmmm, Interesting. Thanks for that!

Correcting previous misinformation:

For the S9 AutoSet, mask fit delivers the 95% pressure from the previous night or 10 cmH2O, whichever is greater, if the machine is in APAP mode.

For manual CPAP mode, AutoSet and Elite, mask fit delivers your set pressure or 10 cmH2O, whichever is greater.

No Mask Fit check for S9 Escape or Escape Auto.

For PRS1 Auto, it delivers "a test pressure." I don't know what the pressure is.

PRS1 mask check is only available in Auto mode. Since the user has to manually select ramp each time he starts the CPAP, there's not much reason to do a separate mask fit check in manual CPAP mode.