Neuromodulation catheters having jacketed neuromodulation elements and related devices, systems, and methods

A catheter comprising:

• an elongate shaft defining a longitudinal axis and comprising:
• a proximal segment comprising a proximal hypotube comprising a distal skive;
• and
• an intermediate segment attached to a distal portion of the proximal segment such that the distal skive extends longitudinally into a proximal portion of the intermediate segment;
• and
• a neuromodulation element connected to a distal portion of the intermediate segment,
• wherein the intermediate segment comprises:
• an inner polymer layer;
• a metal braid;
• and
• at least one outer polymer layer, the metal braid being positioned between the inner polymer layer and the at least one outer polymer layer.

A catheter comprising:

• an elongate shaft defining a longitudinal axis and comprising:
• a proximal segment comprising a proximal hypotube comprising a distal skive;
• and
• an intermediate segment attached to a distal portion of the proximal segment such that the distal skive extends longitudinally into a proximal portion of the intermediate segment;
• and
• a neuromodulation element connected to a distal portion of the intermediate segment,
• wherein the proximal segment further comprises an outer jacket.

A catheter comprising:

• an elongate shaft defining a longitudinal axis and comprising:
• a proximal segment comprising a proximal hypotube comprising a distal skive;
• and
• an intermediate segment attached to a distal portion of the proximal segment such that the distal skive extends longitudinally into a proximal portion of the intermediate segment;
• and
• a neuromodulation element connected to a distal portion of the intermediate segment,
• wherein the neuromodulation element is movable from a low-profile delivery state to a radially expanded deployed state, the neuromodulation element including:
• an outer perimeter;
• a distal segment configured to have a first shape when the neuromodulation element is in the low-profile delivery state and a second shape when the neuromodulation element is in the radially expanded deployed state, the second shape being more helical than the first shape;
• a jacket disposed around at least a portion of an outer surface of the distal segment;
• and
• a plurality of electrodes, each electrode of the plurality of electrodes being seated around the jacket.