An apparatus and method for forming and enlarging percutaneous penetrations comprises an elongate dilation member which receives {HEAD ~ an elongate expansion member} in {TAIL ~ an axial lumen} thereof 
An apparatus and method for forming and enlarging percutaneous penetrations comprises an elongate dilation member which receives { HEAD ~ an elongate expansion member } in { TAIL ~ an axial lumen } thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH