Circumferential ablation device assembly with dual expandable members
First Claim
1. An ablation device assembly for ablating a circumferential region of tissue at a location within a body space where a pulmonary vein extends from an atrium, comprising:
- an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis;
a first expansion element located along the distal end portion, the first expansion element being fluidly coupled to a first source of inflation fluid, and expandable from a radially collapsed condition to a radially expanded condition;
a second expansion element located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to a second source of inflation fluid, and having a circumferential wall and being expandable from a radially collapsed condition to a radially expanded condition; and
an ablation element having an ablative energy source that is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the circumferential wall.
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Accused Products
Abstract
The present invention involves a surgical device and method of use, particularly an assembly and method incorporating dual expandable members along the distal region of an ablation device to facilitate ablation of a circumferential region of tissue engaged by the expandable member. The ablation device assembly includes an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis. A first expansion element is located along the distal end portion of the elongate body, and is fluidly coupled to a first source of inflation fluid. A second expansion element having a circumferential wall is located along the distal end portion proximal the first expansion element, and is fluidly coupled to a second source of inflation fluid. An ablation element having an ablative energy source is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the circumferential wall.
186 Citations
23 Claims
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1. An ablation device assembly for ablating a circumferential region of tissue at a location within a body space where a pulmonary vein extends from an atrium, comprising:
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an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis;
a first expansion element located along the distal end portion, the first expansion element being fluidly coupled to a first source of inflation fluid, and expandable from a radially collapsed condition to a radially expanded condition;
a second expansion element located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to a second source of inflation fluid, and having a circumferential wall and being expandable from a radially collapsed condition to a radially expanded condition; and
an ablation element having an ablative energy source that is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the circumferential wall. - 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. An ablation device assembly for ablating a circumferential region of tissue at a location within a body space where a pulmonary vein extends from an atrium, comprising:
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an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis;
a first expansion element having a first wall thickness, located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid, and expandable from a radially collapsed condition to a radially expanded condition;
a second expansion element having a second wall thickness located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid, and being expandable from a radially collapsed condition to a radially expanded condition, wherein the first wall thickness of the first expansion element is smaller than the second wall thickness of the second expansion element; and
an ablation element having an ablative energy source that is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the second expansion element.
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22. An ablation device assembly for ablating a circumferential region of tissue at a location within a body space where a pulmonary vein extends from an atrium, comprising:
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an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis;
a first expansion element located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid, and expandable from a radially collapsed condition to a radially expanded condition;
a second expansion element located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid, and being expandable from a radially collapsed condition to a radially expanded condition, wherein first expansion element is more compliant that the second expansion element; and
an ablation element having an ablative energy source that is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the second expansion element.
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23. A tissue ablation device assembly for ablating a circumferential region of tissue at a location where a pulmonary vein extends from an atrium, comprising:
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a circumferential ablation member with an ablation element which is adapted to ablatively couple to the circumferential region of tissue, the circumferential ablation member being adjustable from a first condition to a second condition, and including first and second expansion elements, wherein the first expansion element is fluidly coupled to a first source of inflation fluid and the second expansion element is fluidly coupled to a second source of inflation fluid; and
a steerable delivery member with a proximal end portion and a distal end portion that is deflectable and steerable by rotating the proximal end portion such that the distal end portion may be positioned along the location, wherein the circumferential ablation member is adapted to couple to the distal end portion of the steerable delivery member and to be delivered to the location by the steerable delivery member when the circumferential ablation member is in the first condition.
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Specification