Thermal surgical tool
First Claim
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1. A thermal surgical tool, comprising:
- a first arm having a first proximal end, a first distal end, a first side and a second side, the first distal end spaced from the first proximal end along a length of the first arm, the first side and the second side spaced laterally apart from one another along a width of the first arm over at least a portion of the length of the first arm, each of the first and the second sides extending between the first proximal end and the first distal end, wherein the width is perpendicular to the length;
a second arm having a second proximal end and a second distal end, the second distal end spaced from the second proximal end along a length of the second arm, the second distal end movable selectively toward and away from the first distal end; and
a ferromagnetic heater on the first arm, the ferromagnetic heater including an electrical conductor and a ferromagnetic coating covering a portion of the electrical conductor, the ferromagnetic coating having a first edge and a second edge spaced laterally apart from one another along the width of the first arm, the first edge positioned adjacent to the first side of the first arm, the second edge positioned adjacent to the second side of the first arm, and the first edge positioned relative to the second edge such that as the ferromagnetic coating extends toward the first distal end a distance measured from the first edge toward the second edge along the width of the first arm decreases.
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Abstract
An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.
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Citations
20 Claims
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1. A thermal surgical tool, comprising:
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a first arm having a first proximal end, a first distal end, a first side and a second side, the first distal end spaced from the first proximal end along a length of the first arm, the first side and the second side spaced laterally apart from one another along a width of the first arm over at least a portion of the length of the first arm, each of the first and the second sides extending between the first proximal end and the first distal end, wherein the width is perpendicular to the length; a second arm having a second proximal end and a second distal end, the second distal end spaced from the second proximal end along a length of the second arm, the second distal end movable selectively toward and away from the first distal end; and a ferromagnetic heater on the first arm, the ferromagnetic heater including an electrical conductor and a ferromagnetic coating covering a portion of the electrical conductor, the ferromagnetic coating having a first edge and a second edge spaced laterally apart from one another along the width of the first arm, the first edge positioned adjacent to the first side of the first arm, the second edge positioned adjacent to the second side of the first arm, and the first edge positioned relative to the second edge such that as the ferromagnetic coating extends toward the first distal end a distance measured from the first edge toward the second edge along the width of the first arm decreases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification