Multiple antenna ablation apparatus and method
DCFirst Claim
1. An ablation treatment apparatus, comprising:
- a multiple antenna device including a primary antenna with a lumen, a longitudinal axis, a distal end sufficiently sharp to pierce tissue and an energy delivery surface with a length L1, and a secondary antenna at least partially positioned in the primary antenna as the primary antenna is introduced through tissue and a secondary antenna distal portion deployable at a selected tissue site with an energy delivery surface of length L2 that is at least equal to 1/3 L1, wherein at least a portion of the secondary antenna has at least one radius of curvature when introduced from the primary antenna; and
a cable coupled to the multiple antenna device.
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Abstract
An ablation treatment apparatus has a multiple antenna device. The multiple antenna device includes a primary antenna with a lumen, a longitudinal axis and an ablative surface area of length L1. The multiple antenna device also includes a secondary antenna that is positioned in the primary antenna as the primary antenna is introduced through tissue. A secondary antenna distal end is deployed at a selected tissue site from the primary antenna lumen in a lateral direction relative to the longitudinal axis. A sensor is at least partially positioned at an exterior of the secondary antenna distal end at a distance L2 from the primary antenna along the secondary antenna distal end. L2 is at least equal to 1/3 L1. An energy source is coupled to the primary antenna.
849 Citations
43 Claims
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1. An ablation treatment apparatus, comprising:
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a multiple antenna device including a primary antenna with a lumen, a longitudinal axis, a distal end sufficiently sharp to pierce tissue and an energy delivery surface with a length L1, and a secondary antenna at least partially positioned in the primary antenna as the primary antenna is introduced through tissue and a secondary antenna distal portion deployable at a selected tissue site with an energy delivery surface of length L2 that is at least equal to 1/3 L1, wherein at least a portion of the secondary antenna has at least one radius of curvature when introduced from the primary antenna; and a cable coupled to the multiple antenna device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An ablation treatment apparatus, comprising:
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a multiple antenna device including a primary antenna with a lumen, a longitudinal axis, a distal end sufficiently Sharp to pierce tissue and an energy delivery surface with a length L1, and a secondary antenna at least partially positioned in the primary antenna as the primary antenna is introduced through tissue and a secondary antenna distal portion deployable at a selected tissue site from the primary antenna lumen in a lateral direction relative to the longitudinal axis, the secondary antenna including an energy delivery surface of length L2, wherein at least a portion of the energy delivery surface of length L2 has at least one radius of curvature when introduced from the primary antenna and L2 is at least equal to 1/3 L1 ; and a sensor positioned at the secondary antenna distal portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. 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 and an energy delivery surface and a primary distal end sufficiently sharp to pierce tissue, and a secondary antenna with a distal portion configured to be deployed from the primary antenna, wherein the distal portion at least partially includes one radius of curvature; inserting the primary antenna into the selected tissue mass with at least a portion of the secondary antenna distal portion positioned in the primary antenna lumen; advancing the secondary antenna distal portion out of the primary antenna lumen and into the selected tissue mass in a lateral direction relative to a longitudinal axis of the primary antenna; delivering electromagnetic energy from the primary antenna energy delivery. surface to the selected tissue mass; and creating an ablation volume in the selected tissue mass. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
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Specification