In preferred non exclusive forms, it relates to the selection of a variable maximum IPAP duration, a variable minimum IPAP duration and {HEAD ~ the automatic adjustment} of {TAIL ~ a variable IPAP duration}, or combinations of these 
In preferred non exclusive forms , it relates to the selection of a variable maximum IPAP duration , a variable minimum IPAP duration and { HEAD ~ the automatic adjustment } of { TAIL ~ a variable IPAP duration } , or combinations of these
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH