Microwave apparatus for controlled tissue ablation
First Claim
1. Apparatus for tissue ablation, said apparatus comprisingan elongated catheter terminated by a relatively flat antenna having opposite faces and includinga first, linear, conductor having opposite faces and proximal and distal ends,an electrically insulating spacer covering one face of the first conductor, anda second, serpentine, conductor composed of a series of similar segments positioned flush against said spacer and being coextensive lengthwise with the first conductor, said second conductor having a distal end connected to the distal end of the first conductor and a proximal end, andan electrically insulating enclosure surrounding the conductors, said enclosure including a body of low dielectric material adjacent the first conductor at one face of said antenna so that the antenna has a characteristic radiation pattern that is directed preferentially away from the other face of the antenna.
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Accused Products
Abstract
Apparatus for controlled tissue ablation includes an elongated relatively flexible antenna with a first, strip-like, conductor having opposite faces and proximal and distal ends, a dielectric spacer covering one face of the first conductor, and a second, serpentine, conductor composed of a series of similar segments positioned flush against the spacer and being coextensive lengthwise with the first conductor. The second conductor has a distal end connected to the distal end of the first conductor and a proximal end. An electrically insulating enclosure surrounds the conductors. The proximal ends of the first and second conductors may be connected via a coaxial cable to a remote microwave transmitter/receiver unit.
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Citations
21 Claims
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1. Apparatus for tissue ablation, said apparatus comprising
an elongated catheter terminated by a relatively flat antenna having opposite faces and including a first, linear, conductor having opposite faces and proximal and distal ends, an electrically insulating spacer covering one face of the first conductor, and a second, serpentine, conductor composed of a series of similar segments positioned flush against said spacer and being coextensive lengthwise with the first conductor, said second conductor having a distal end connected to the distal end of the first conductor and a proximal end, and an electrically insulating enclosure surrounding the conductors, said enclosure including a body of low dielectric material adjacent the first conductor at one face of said antenna so that the antenna has a characteristic radiation pattern that is directed preferentially away from the other face of the antenna.
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16. Apparatus for tissue ablation, said apparatus comprising
an elongated catheter terminated by a relatively flat antenna, said antenna having opposite faces and including a serpentine conductor composed of a series of substantially similar sinuous segments and having proximal and distal ends and a longitudinal axis extending between said ends; -
a substantially straight conductor having proximal and distal ends and a longitudinal axis extending therebetween, said conductors being spaced opposite one another with their axes in parallelism so as to provide an insulating gap between said conductors; a electrical connection between the distal ends of the conductors, and a body of low dielectric material adjacent the straight conductor at one face of the antenna whereby the antenna has a characteristic antenna pattern which is directed preferentially away from the other face of the antenna. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification