Provided herein in some embodiments is a catheter including an elongate body with a polymeric portion and a metallic portion； a balloon over at least some of the polymeric portion； a coupler formed over or between the polymeric and metallic portions； and one or more scoring wires. The metallic portion can include a spiral-cut portion configured to prevent elongation and kinking of the elongate body. The one or more scoring wires can be fixed to and extend from a tip at a distal end of the elongate body, over the balloon, through the polymeric portion of the elongate body, through the coupler, and to the metallic portion of the elongate body. The one or more scoring wires can be fixed to an internal surface of the spiral-cut portion or formed from the spiral-cut portion.
