Tubular large bore transseptal crossing sheath

A transseptal crossing catheter system, the system comprising:

• an electrically enabled introducer sheath comprising:
• an elongate, flexible tubular body comprising an electrically conductive sidewall defining a central lumen, the electrically conductive sidewall comprising:
• a proximal end, and
• a distal end comprising an annular surface disposed on a distal-most face of the elongate, flexible tubular body, the annular surface being integral with the proximal end of the electrically conductive sidewall and being electrically conductive;
• at least four distal extensions disposed on the distal end, wherein the at least four distal extensions are configured to enhance delivered radiofrequency energy density to organic tissue, and wherein each of the at least four distal extensions comprise a leading charge transfer surface forming a scalloped surface;
• a wire being movable relative to the elongate, flexible tubular body to extend at least partially through the electrically enabled introducer sheath and to extend distally through and beyond the annular surface of the elongate, flexible tubular body;
• a first tubular insulation layer surrounding the electrically conductive sidewall and leaving the annular conductive surface exposed at the distal end;
• a second insulation layer disposed on an outer surface of the wire, wherein the second insulation layer is separate from the first tubular insulation layer, and wherein the second insulation layer is in between the wire and the electrically conductive sidewall;
• and
• a proximal hub on the elongate, flexible tubular body comprising:
• at least one access port in communication with the proximal end and the central lumen, and
• a connector in electrical communication with the electrically conductive sidewall.