(06-17-2013, 11:39 PM)spdklls99 Wrote: I have a Bipap St I have been using for about 3 years now.
(13/17 with a rate of 12bpm)
(06-18-2013, 01:44 AM)spdklls99 Wrote: Basically I am confused with the options of the Auto sv...any advice on what i should start out with on the options below when my present bipap setting is epap 13..ipap 17?
max pressure ?
EPAP min ?
epap max ?
Ps min ?
ps max ?
Hi spdklls99, welcome to the forum!
I strongly recommend installing the latest version of SleepyHead and starting to become acquainted with the data reported by your BiPAP ST, and later with your data from the new DS950 of course. Otherwise you will be flying blind and mostly unable to see issues or optimize your treatment.
The hardest thing to control will be unintentional mask leak, because the machine will need to raise the inhale pressure as high as needed (probably somewhere in the range 20-25 cmH2O) to keep you well ventilated when Complex Sleep Apnea causes you to stop trying to breathe. The high inhale pressures (which are necessary for ASV operation) make leaks more troublesome.
What masks have you tried so far?
Suggested initial settings for the DS950:
Max Pressure: 25 (should be at least 10 higher than EPAP Max, so that the Pressure Support can go as high as at least 10 during central events, even when EPAP gets max'ed out)
EPAP Min: 10 (or perhaps as high as 13 like your BiPAP ST settings but I suggest 10 in order to lower the pressure and the machine will automatically adjust higher when needed)
EPAP Max: 15 (or perhaps as low as 13 like your BiPAP ST settings - will need to monitor data from the DS950 to see whether the EPAP is sometimes max'ing out or can be lowered)
PS Min: 4 like your BiPAP ST settings, or higher if more comfortable, or higher if data shows your Tidal Volume (volume of air breathed in or out during one breath) sometimes very slowly drifts very low without machine responding, leading to arousals. The PS is always the difference between inhale (IPAP) and exhale (EPAP). If you stop breathing the ASV machine will immediately increase PS to keep you well ventilated.
Pressure Support Max (PS Max): 15 (should be at very least 10).
Backup Rate: 12 Breaths Per Minute (or perhaps Auto, but I suggest 12 initially, as found during your BiPAP titration)