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