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