Ablation device with ionically conductive balloon
First Claim
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1. An ablation device for treating body tissue, comprising:
- an elongate shaft having a proximal section, a distal section, and at least one fluid lumen configured to receive an electrically conductive fluid;
an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with the at least one fluid lumen for actuating the balloon between a collapsed state and an expanded state, wherein the balloon comprises a composite structure having a proximal balloon section including a first polymeric material and a distal balloon section including a second polymeric material different from the first material, and the first polymeric material is a hydrophobic polymer and the second polymeric material is a hydrophilic polymer; and
at least one electrode located within the interior space of the balloon.
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Abstract
Devices, systems, and methods for performing ablation therapy on body tissue are disclosed. An example ablation device for treating body tissue includes an ionically conductive balloon and a radio-frequency electrode that delivers RF energy into a distal section of the balloon. The balloon can have a composite structure with a non-conductive section and a conductive section. A method for fabricating a semi-permeable ablation balloon using ionizing radiation and an etching process is also disclosed.
423 Citations
14 Claims
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1. An ablation device for treating body tissue, comprising:
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an elongate shaft having a proximal section, a distal section, and at least one fluid lumen configured to receive an electrically conductive fluid; an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with the at least one fluid lumen for actuating the balloon between a collapsed state and an expanded state, wherein the balloon comprises a composite structure having a proximal balloon section including a first polymeric material and a distal balloon section including a second polymeric material different from the first material, and the first polymeric material is a hydrophobic polymer and the second polymeric material is a hydrophilic polymer; and at least one electrode located within the interior space of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An ablation device for treating body tissue, comprising:
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an elongate shaft having a proximal section, a distal section, and at least one fluid lumen configured to receive an electrically conductive fluid; an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with the at least one fluid lumen for actuating the balloon between a collapsed state and an expanded state; at least one electrode located within the interior space of the balloon; and a spring-actuated plunger assembly configured to bias the balloon in the collapsed state, the plunger assembly including a plunger mechanism and a spring configured to bias the plunger mechanism against the balloon, the plunger mechanism including a plunger shaft and an atraumatic tip, wherein the atraumatic tip is configured to disengage from the balloon in the expanded state.
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Specification