Multiple antenna ablation apparatus and method with cooling element
First Claim
1. An ablation apparatus, comprising:
- a multiple antenna device configured to be coupled to an energy source, the multiple antenna device including a primary antenna with a lumen and a longitudinal axis and a distal end sufficiently sharp to pierce tissue, and a secondary antenna at least partially positioned in the secondary antenna including a distal portion configured to be deployed from the lumen in a lateral direction relative to the longitudinal axis, wherein at least a part of a deployed secondary antenna distal portion has at least one radius of curvature;
at least one cable configured to be coupled to the multiple antenna device; and
a cooling element coupled to the primary antenna.
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Abstract
An ablation apparatus includes a multiple antenna device coupled to an electromagnetic energy source that produces an electromagnetic energy ablation output. The multiple antenna device includes a primary antenna with a lumen and a longitudinal axis, and a secondary antenna deployable from the lumen in a lateral direction relative to the longitudinal axis. At least a distal end of each secondary antenna is structurally less rigid than the primary antenna, and the primary antenna is sufficiently rigid to be introduced through tissue. At least one cable coupling the multiple antenna device to the energy source. A cooling element is coupled to the primary antenna. A variety of energy sources can be used including RF, microwave and laser.
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Citations
51 Claims
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1. An ablation apparatus, comprising:
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a multiple antenna device configured to be coupled to an energy source, the multiple antenna device including a primary antenna with a lumen and a longitudinal axis and a distal end sufficiently sharp to pierce tissue, and a secondary antenna at least partially positioned in the secondary antenna including a distal portion configured to be deployed from the lumen in a lateral direction relative to the longitudinal axis, wherein at least a part of a deployed secondary antenna distal portion has at least one radius of curvature; at least one cable configured to be coupled to the multiple antenna device; and a cooling element coupled to the primary antenna. - 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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21. A method for creating an ablation volume in a selected tissue mass, comprising:
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providing an ablation device with a primary antenna, one or more deployable secondary antennas at least partially housed in a primary antenna lumen formed in the primary antenna, a cooling element coupled to the primary antenna and an energy source coupled to the antennas to deliver electromagnetic energy, the primary antenna including a distal end sufficiently sharp to pierce tissue and at least a portion of a deployed distal portion of the secondary antennas is configured to have at least one radius of curvature; inserting the primary antenna into the selected tissue mass; advancing at least one secondary antenna into the selected tissue mass from the primary antenna lumen in a lateral direction relative to a longitudinal axis of the primary antenna; cooling an energy delivery service of the primary antenna; delivering electromagnetic energy from one of the primary antenna energy delivery surface, a secondary antenna energy delivery surface or both to the selected tissue mass; and creating an ablation volume in the selected tissue mass. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. An ablation apparatus, comprising:
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an introducer including a lumen, a distal portion and a distal end sufficiently sharp to penetrate tissue, the introducer having a distal portion and an energy delivery device coupled to an energy source; a temperature monitoring device at least partially positioned in the introducer as the introducer is advanced through the tissue, the temperature monitoring device including the distal portion at least partially deployable from the introducer at a selected tissue site, wherein at least part of the temperature monitoring device distal portion has at least one radius of curvature when deployed from the introducer; a cooling element coupled to the introducer; and a cable coupling the energy source to the energy delivery device. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification