The tubular section between the two expanded head may resiliently expand, and may also be balloon expanded or otherwise plastically deformed to enlarge {HEAD ~ the flow} through lumen of {TAIL ~ the tubular section} 
The tubular section between the two expanded head may resiliently expand , and may also be balloon expanded or otherwise plastically deformed to enlarge { HEAD ~ the flow } through lumen of { TAIL ~ the tubular section }
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 OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL