Renal nerve modulation medical devices

A renal nerve modulation device, comprising:

• an elongate shaft having a distal region and an inner surface;
• an ablation member coupled to the distal region;
• wherein the inner surface is stepped radially outward so that the distal region has a larger inner diameter than portions of the shaft proximal of the distal region;
• a ribbon disposed within the distal region of the shaft, the ribbon having a proximal end and a distal end;
• and
• an ablation member lead coupled to the ablation member and extending proximally along the inner surface of the shaft to a proximal end of the shaft.

A method for renal nerve modulation, the method comprising:

• providing a renal nerve modulation device, the renal nerve modulation device comprising:
• an elongate shaft having a distal region and an inner surface,
• an ablation member coupled to the distal region,
• wherein the inner surface is stepped radially outward so that the distal region has a larger inner diameter than portions of the shaft proximal of the distal region,
• a ribbon disposed within the distal region of the shaft, the ribbon having a proximal end and a distal end, and
• an ablation member lead coupled to the ablation member and extending proximally along the inner surface of the shaft to a proximal end of the shaft;
• advancing the renal nerve modulation device through a blood vessel to a position adjacent to a renal nerve;
• and
• actuating the ablation member to ablate the renal nerve.