Multicut cardiac valve cutter
AssigneeBonaparte Medical, Inc.
InventorMichael B. McDonald
Life of this patent
Estimating the term…
Abstract
A cutting device is provided to cut stenosed aortic valve leaflets using a percutaneous approach. The device has a central catheter that moves over a guide wire to pass into a patient's aortic valve. Cutting wires are deployed from the catheter and have high speed rotating cutting surfaces that cut into the stenosed tissue. A plurality of guidewires outward from the cutting wires serve to center and position the cutter within the patient's aortic valve. In an alternative embodiment, a shield is deployed between the cutting wires and the patient's aortic valve to prevent the cutting wires from cutting into the aortic root or aortic sinus wall.
Claims11
A cutting device comprising:
- a central catheter adapted to receive a central guide wire, the central guide wire configured to pass the cutting device into a patient's heart;
- one or more high speed rotatable or reciprocating cutting wires disposed between the central catheter and a retractable outer sheath;
- a plurality of guidewires disposed between the central catheter and the retractable outer sheath, distal ends of each of the plurality of guidewires affixed to a distal tip of the cutting device, the plurality of guidewires configured to center the cutting device within the patient's aortic valve when the guidewires are deployed, each of the plurality of guidewires comprising a central protrusion, a distal protrusion, and a central valley between the central and distal protrusions when the guidewires are deployed
- a middle catheter affixed to a proximal end of each of the plurality of guidewires, such that advancing the middle catheter when the outer sheath is retracted deploys the plurality of guidewires;
- a shield deployable between the one or more cutting wires and an outer wall of the patient's aorta, the shield extending from a shield catheter, the shield catheter disposed between the middle catheter and the outer sheath, the shield catheter comprising a vertical slit near its distal end, distal edges of the vertical slit configured to deploy to form the shield when the sheath is retracted.
A cutting device comprising:
- a central catheter adapted to receive a central guide wire, the central guide wire configured to pass the cutting device into a patient's heart;
- one or more high speed rotatable or reciprocating cutting wires disposed between the central catheter and a retractable outer sheath;
- a plurality of guidewires configured to center the cutting device within the patient's aortic valve when the guidewires are deployed, each of the plurality of guidewires comprising a central protrusion, a distal protrusion, and a central valley between the central and distal protrusions when the guidewires are deployed
- a middle catheter affixed to a proximal end of each of the plurality of guidewires, such that advancing the middle catheter when the outer sheath is retracted deploys the plurality of guidewires;
- a shield deployable between the one or more cutting wires and an outer wall of the patient's aorta, the shield extending from a shield catheter, the shield catheter disposed between the middle catheter and the outer sheath, the shield catheter comprising a vertical slit near its distal end, distal edges of the vertical slit configured to deploy to form the shield when the sheath is retracted.
Dependencies are inferred from the claim text.