The respiratory conduit includes {HEAD ~ at least two volumes}, positioned between the patient interface device and {TAIL ~ the pressurized air generating device} 
positioned between
The respiratory conduit includes { HEAD ~ at least two volumes } , positioned between the patient interface device and { TAIL ~ the pressurized air generating device }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL