It should be noted that {HEAD ~ the outer diameter} of the dilator at its constant diameter portion is close to {TAIL ~ the outer diameter} of the flexible tubing 35 so that tubing 35 is guided through the wall of the vessel by the dilator 
is close to
It should be noted that { HEAD ~ the outer diameter } of the dilator at its constant diameter portion is close to { TAIL ~ the outer diameter } of the flexible tubing 35 so that tubing 35 is guided through the wall of the vessel by the dilator
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH