Atherectomy system adapted to enable retrograde ablation

An atherectomy system adapted to enable bidirectional ablation, the atherectomy system comprising:

• a proximal handle including an actuation member adapted to be movable in a first direction in order to implement anterograde ablation and to be movable in a second direction in order to implement retrograde ablation;
• an atherectomy tool including a distal region adapted for anterograde ablation and a proximal region adapted for retrograde ablation;
• and
• a drive coil extending between the proximal handle and the atherectomy tool, the drive coil adapted to provide consistent feedback via the actuation member regardless of whether the atherectomy tool is implementing retrograde ablation or anterograde ablation;
• wherein the drive coil has a tensile stiffness within a range of 0.5 to 2 N/mm (gage length of 100 mm).

An atherectomy system adapted to enable bidirectional ablation, the atherectomy system comprising:

• a proximal handle including an actuation member adapted to be movable in a first direction to cause an atherectomy burr to move in an anterograde ablation direction and to be movable in a second direction to cause the atherectomy burr to move in a retrograde ablation direction;
• the atherectomy burr including a distal region adapted for anterograde ablation and a proximal region adapted for retrograde ablation;
• and
• a drive coil extending between the proximal handle and the atherectomy burr, the drive coil adapted to provide:
• a force-torque ratio within a range of −10 gf/mNm to 10 gf/mNm;
• a tensile stiffness within a range of 0.5 to 2 N/mm (gage length of 100 mm);
• and
• a compressive stiffness within a range of 3.5 to 5 N/mm (gage length of 10 mm).