The tubular braid is anchored by axial shortening of the mesh and remains in place to permit {TAIL ~ subsequent exchange} of {HEAD ~ dilation members} to provide for different diameter access lumens 
The tubular braid is anchored by axial shortening of the mesh and remains in place to permit { TAIL ~ subsequent exchange } of { HEAD ~ dilation members } to provide for different diameter access lumens
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH