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