Multiple antenna ablation apparatus and method
DCFirst Claim
1. An ablation treatment apparatus, comprising:
- a trocar including a distal end sharp enough to pierce tissue, and a hollow lumen extending along a longitudinal axis of the trocar;
a multiple antenna ablation device including three or more antennas, each antenna including a distal portion and each antenna being at least partially positioned in the trocar lumen as the trocar is introduced through tissue, at least a part of each distal portion of a deployed antenna being configured to be deployable from the trocar lumen at a selected tissue site with at least one radius of curvature and having a deployed antenna electromagnetic energy delivery surface, wherein a collective size of the deployed antennas'"'"' electromagnetic energy delivery surfaces is sufficient to create a volumetric ablation between the deployed antennas without impeding out a deployed antenna when 10 to 50 watts of electromagnetic energy is delivered from an electromagnetic energy source to the multiple antenna ablation device; and
at least one cable coupling the multiple antenna ablation device to the electromagnetic energy source.
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Abstract
A multiple antenna ablation apparatus includes an electromagnetic energy source, a trocar including a distal end, and a hollow lumen extending along a longitudinal axis of the trocar, and a multiple antenna ablation device with three or more antennas. The antennas are initially positioned in the trocar lumen as the trocar is introduced through tissue. At a selected tissue site the antennas are deployable from the trocar lumen in a lateral direction relative to the longitudinal axis. Each of the deployed antennas has an electromagnetic energy delivery surface of sufficient size to, (i) create a volumetric ablation between the deployed antennas, and (ii) the volumetric ablation is achieved without impeding out any of the deployed antennas when 10 to 50 watts of electromagnetic energy is delivered from the electromagnetic energy source to the multiple antenna ablation device. At least one cable couples the multiple antenna ablation device to the electromagnetic energy source.
404 Citations
38 Claims
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1. An ablation treatment apparatus, comprising:
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a trocar including a distal end sharp enough to pierce tissue, and a hollow lumen extending along a longitudinal axis of the trocar; a multiple antenna ablation device including three or more antennas, each antenna including a distal portion and each antenna being at least partially positioned in the trocar lumen as the trocar is introduced through tissue, at least a part of each distal portion of a deployed antenna being configured to be deployable from the trocar lumen at a selected tissue site with at least one radius of curvature and having a deployed antenna electromagnetic energy delivery surface, wherein a collective size of the deployed antennas'"'"' electromagnetic energy delivery surfaces is sufficient to create a volumetric ablation between the deployed antennas without impeding out a deployed antenna when 10 to 50 watts of electromagnetic energy is delivered from an electromagnetic energy source to the multiple antenna ablation device; and at least one cable coupling the multiple antenna ablation device to the electromagnetic energy source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An ablation treatment apparatus, comprising:
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a trocar including a distal end sharp enough to pierce tissue, and a hollow lumen extending along a longitudinal axis of the trocar; a multiple antenna ablation device including a plurality of antennas, each antenna including a distal portion and each antenna being at least partially positioned in the trocar lumen as the trocar is introduced through tissue, at least a part of each distal portion of a deployed antenna being configured to be deployable from the trocar lumen at a selected tissue site with at least one radius of curvature, wherein the plurality of antennas includes a sufficient number of antennas to create an ablation volume between the antennas in the selected tissue site without impeding out the plurality of antennas when 10 to 50 watts of electromagnetic energy is delivered from the electromagnetic energy source to the plurality of antennas; and at least one cable coupling the multiple antenna ablation device to the electromagnetic energy source. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A method for creating a volumetric ablation in a selected tissue mass, comprising:
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providing a multiple antenna ablation apparatus including a trocar with a trocar lumen, a plurality of antennas deployable from the lumen, and an electromagnetic energy source coupled to the plurality of antennas; inserting the trocar into the selected tissue mass with the plurality of antennas positioned in the trocar lumen; advancing the plurality of antennas from the trocar lumen in a lateral direction relative to a longitudinal axis of the trocar into the selected tissue mass; delivering 10 to 50 watts of electromagnetic energy from the electromagnetic energy source to the plurality of antennas without impeding out an antenna of the plurality of antennas; and creating the volumetric ablation in the selected tissue mass. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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Specification