Systems and methods for catheter feedback and control for AV fistula creation

A method of operating a catheter assembly including a first tissue contact surface, a second tissue contact surface, a heating element coupled to the first tissue contact surface, and a gap feedback sensor configured to produce a gap feedback signal associated with a distance between the first tissue contact surface and the second tissue contact surface, the method comprising:

• monitoring the gap feedback signal indicative of the distance between the first tissue contact surface and the second tissue contact surface;
• producing via a user interface of the catheter assembly, a graphical depiction of the first tissue contact surface by the distance;
• and
• producing, via the user interface of the catheter assembly, a gap distance warning when the gap feedback signal indicates that the distance is outside of a target gap range.