Catheter with expandable scoring members

A catheter for treatment of a vessel lesion, the catheter comprising:

• a catheter shaft;
• and
• a sheathed scoring element coupled to the catheter shaft, the sheathed scoring element including:
• shape memory elements formed of a shape memory material that is configured to move between a constrained condition and a radially self-expanded condition;
• scoring members located on a portion of the shape memory elements;
• and
• a deployment sheath that is configured to move relative to the scoring members and the shape memory elements between:
• a delivery condition where the scoring members and at least a portion of the shape memory elements are located inside of the deployment sheath;
• and
• a scoring condition where:
• at least the portion of the shape memory elements is located distal to a distal end of the deployment sheath and the shape memory elements are configured in the radially self-expanded condition;
• and
• the scoring members are located distal to a distal end of the deployment sheath and are configured to contact a target site;
• and
• an expansion member configured to impart a radial force on the portion of the shape memory elements when the deployment sheath is in the scoring condition and the shape memory elements are in the radially self-expanded condition.

A catheter for treatment of a vessel lesion, the catheter comprising:

• a catheter shaft;
• and
• a sheathed scoring element coupled to the catheter shaft, the sheathed scoring element including:
• shape memory elements that are formed of a shape memory material and are configured to move between a constrained condition and a radially self-expanded condition, wherein the shape memory elements have a substantially planar outer surface;
• scoring blades located on a portion of the shape memory elements, wherein the scoring blades are offset at least proximally from distal tips of the shape memory elements and wherein the scoring blades protrude a distance from substantially planar outer surface of the shape memory elements;
• and
• a deployment sheath that is axially movable relative to the scoring blades and the shape memory elements between:
• a delivery condition where the scoring blades and at least a portion of the shape memory elements are located inside of the deployment sheath;
• and
• a scoring condition where:
• at least the portion of the shape memory elements is located distal to a distal end of the deployment sheath and the shape memory elements are configured in the radially self-expanded condition;
• and
• the scoring blades are located distal to a distal end of the deployment sheath and are configured to contact a target site;
• and
• an expansion member configured to impart a radial force on the portion of the shape memory elements when the deployment sheath is in the scoring condition and the shape memory elements are in the radially self-expanded condition.