Thermal resecting loop
First Claim
1. A thermal resecting instrument comprising:
- a thermal resecting element comprising;
a conductor loop defining a void for receiving tissue anda ferromagnetic layer coating and in electrically conductive communication with a surface of at least a portion of the conductor loop, the ferromagnetic layer forming a ferromagnetic region disposed along the conductor loop, the conductor loop extending from a position prior to the ferromagnetic layer, through the ferromagnetic region and to a position beyond the ferromagnetic layer;
wherein the thermal resecting element is configured to allow passage of electrical energy from a conductor loop location prior to the ferromagnetic region to a conductor loop location beyond the ferromagnetic region, to thereby cause the ferromagnetic layer to heat, andwherein the ferromagnetic layer has a thickness of between about 1 μ
m and about 50 μ
m.
2 Assignments
0 Petitions
Accused Products
Abstract
A thermal surgical instrument comprising a conductor having a ferromagnetic material in electrical communication with the conductor, such that passage of electrical energy through the conductor causes substantially uniform heating of the ferromagnetic material sufficient to produce a desired therapeutic tissue effect is provided. The conductor may be shaped to facilitate resection of tissue from a patient and include a support to provide increase rigidity to the loop so that the conductor better resists bending during use. The ferromagnetic material quickly heats and cools in response to a controllable power delivery source. The thermal surgical instrument can be used for substantially simultaneously resecting tissue with hemostasis.
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Citations
29 Claims
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1. A thermal resecting instrument comprising:
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a thermal resecting element comprising; a conductor loop defining a void for receiving tissue and a ferromagnetic layer coating and in electrically conductive communication with a surface of at least a portion of the conductor loop, the ferromagnetic layer forming a ferromagnetic region disposed along the conductor loop, the conductor loop extending from a position prior to the ferromagnetic layer, through the ferromagnetic region and to a position beyond the ferromagnetic layer; wherein the thermal resecting element is configured to allow passage of electrical energy from a conductor loop location prior to the ferromagnetic region to a conductor loop location beyond the ferromagnetic region, to thereby cause the ferromagnetic layer to heat, and wherein the ferromagnetic layer has a thickness of between about 1 μ
m and about 50 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A thermal resecting system comprising:
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a handpiece; a continuous conductor having a first end and a second end and defining a void through which tissue can pass; a ferromagnetic layer coating and in electrically conductive communication with a surface of at least a portion of the continuous conductor between the first end and the second end; and electrical leads attached to the first end and the second end of the continuous conductor for supplying electrical energy to the continuous conductor; and a power supply in communication with the electrical leads for providing the electrical energy to the continuous conductor; and wherein the ferromagnetic layer has a thickness of between about 1 μ
m and about 50 μ
m. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A surgical tip having a continuous conductor having a first end and a second end wherein the surgical tip comprises a cutting or ablating surface comprising a ferromagnetic material coating and in electrically conductive communication with a surface of an elongate section of the continuous conductor to form a ferromagnetic region between the first end and the second end;
- the first end or the second end of the continuous conductor having a conductivity and configured such that passage of electrical energy from a conductor location prior to the ferromagnetic region to a conductor location beyond the ferromagnetic region causes the ferromagnetic material to heat; and
wherein the ferromagnetic material has a thickness of between about 1 μ
m and about 50 μ
m. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
- the first end or the second end of the continuous conductor having a conductivity and configured such that passage of electrical energy from a conductor location prior to the ferromagnetic region to a conductor location beyond the ferromagnetic region causes the ferromagnetic material to heat; and
Specification