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