Medical dilator, and systems, methods, and kits for medical dilation

A medical dilation system, comprising:

• a medical dilator comprising an elongate member having a proximal end portion, an opposed distal end portion, and a lumen extending through the elongate member from the proximal end portion to the distal end portion;
• a dilating tip at the distal end portion, the dilating tip having a first end of enlarged cross-sectional area and tapering going in the distal direction to a second end of reduced cross-sectional area, the dilating tip comprising a proximal piece having a distal-facing shoulder surface and a neck extending distally from the shoulder surface;
• at least a first electrode associated with the dilating tip;
• and an electrical conductor electrically connected to the first electrode and extending proximally from the first electrode to the proximal end portion;
• and
• an electroanatomical mapping system electrically connectable to the electrical conductor and configured to receive an electroanatomical mapping signal from the electrode and determine a location of the dilating tip based on the electroanatomical mapping signal;
• wherein the first electrode is annular and is received on the neck and abuts the shoulder surface;
• and
• wherein the dilating tip further comprises a distal piece received on the neck distally of and abutting the first electrode.