Electrical ablation devices and methods
First Claim
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1. An ablation apparatus, comprising:
- a first electrode having a first diameter;
a plurality of second electrodes, each of the plurality of second electrodes having a second diameter, and wherein each of the plurality of second electrodes comprises;
a proximal end;
a distal end;
a first conductive portion intermediate the proximal end and the distal end;
a non-conductive portion intermediate the first conductive portion and the distal end; and
a second conductive portion at the distal end;
a grounding pad comprising a non-conductive outer region and a conductive inner region, wherein the grounding pad further defines a hole, and wherein the first electrode is positioned within the hole; and
an energy source coupled to the first electrode and the plurality of second electrodes, wherein the energy source is configured to deliver a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation; and
wherein the first diameter is greater than the second diameter.
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Abstract
An ablation device may generally comprise a first electrode, a plurality of second electrodes, and a grounding pad. Each of the plurality of second electrodes may comprise a first conductive section, a second conductive section, and a non-conductive section between the first conductive section and the second conductive section. The first electrode and each of the plurality of second electrodes may be coupled to an energy source delivering a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation.
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Citations
20 Claims
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1. An ablation apparatus, comprising:
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a first electrode having a first diameter; a plurality of second electrodes, each of the plurality of second electrodes having a second diameter, and wherein each of the plurality of second electrodes comprises; a proximal end; a distal end; a first conductive portion intermediate the proximal end and the distal end; a non-conductive portion intermediate the first conductive portion and the distal end; and a second conductive portion at the distal end; a grounding pad comprising a non-conductive outer region and a conductive inner region, wherein the grounding pad further defines a hole, and wherein the first electrode is positioned within the hole; and an energy source coupled to the first electrode and the plurality of second electrodes, wherein the energy source is configured to deliver a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation; and wherein the first diameter is greater than the second diameter.
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2. An ablation apparatus, comprising:
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a first electrode having a first diameter; a plurality of second electrodes, each of the plurality of second electrodes having a second diameter, and wherein each of the plurality of second electrodes comprises; a proximal end; a distal end; a first conductive portion intermediate the proximal end and the distal end; a non-conductive portion intermediate the first conductive portion and the distal end; and a second conductive portion at the distal end; a grounding pad comprising a non-conductive outer region and a conductive inner region, wherein the first electrode does not contact the conductive inner region of the grounding pad; and an energy source coupled to the first electrode and the plurality of second electrodes, wherein the energy source is configured to deliver a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation; and wherein the first diameter is greater than the second diameter. - View Dependent Claims (3, 4, 5, 6)
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7. An ablation apparatus, comprising:
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a first electrode; a plurality of second electrodes, wherein each second electrode comprises; a proximal end; a distal end; a first conductive portion intermediate the proximal end and the distal end; a non-conductive portion intermediate the first conductive portion and the distal end; and a second conductive portion at the distal end; a grounding pad, wherein the grounding pad defines a hole, and wherein the first electrode is configured for insertion through the hole; and an energy source electrically coupled to the first electrode and the plurality of second electrodes, wherein the energy source is configured to deliver a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation. - View Dependent Claims (8, 9, 10, 11)
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12. An ablation apparatus, comprising:
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a first electrode; a plurality of second electrodes, wherein each second electrode comprises; a proximal end; a distal end; a first conductive portion intermediate the proximal end and the distal end; a non-conductive portion intermediate the first conductive portion and the distal end; and a second conductive portion at the distal end; a grounding pad, wherein the grounding pad comprises a non-conductive outer region, a conductive inner region, and defines a hole; and an energy source electrically coupled to the first electrode and the plurality of second electrodes, wherein the energy source is configured to deliver a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation. - View Dependent Claims (13, 14, 15, 16)
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17. An ablation device for coupling to an energy source delivering a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation, wherein the ablation device comprises:
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a first electrode coupleable to the energy source; a plurality of second electrodes, wherein each second electrode is coupleable to the energy source, and wherein each second electrode comprises; a first conductive section; a second conductive section; and a non-conductive section between the first conductive section and the second conductive section; and a grounding pad, wherein the grounding pad defines a hole, and wherein the first electrode is insertable through the hole. - View Dependent Claims (18, 19)
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20. An ablation device for coupling to an energy source delivering a series of electrical pulses to tissue to induce cell necrosis by irreversible electroporation, wherein the ablation device comprises:
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a first electrode coupleable to the energy source; a plurality of second electrodes, wherein each second electrode is coupleable to the energy source, and wherein each second electrode comprises; a first conductive section; a second conductive section; and a non-conductive section between the first conductive section and the second conductive section; and a grounding pad, wherein the grounding pad defines a hole, and wherein the first electrode is configured for insertion through the hole and into tissue to a first distance, and wherein each second electrode is configured for insertion through the grounding pad and into the tissue to a second distance.
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Specification