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 having a first uniform wall thickness (t), located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid by a first inflation lumen, and expandable from a radially collapsed condition to a radially expanded condition;
a second expansion element having a second uniform wall thickness (t′
) located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid by the first inflation lumen, and being expandable from a radially collapsed condition to a radially expanded condition, wherein the first wall thickness (t) of the first expansion element is smaller than the second wall thickness (t′
) 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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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.
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Citations
18 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 having a first uniform wall thickness (t), located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid by a first inflation lumen, and expandable from a radially collapsed condition to a radially expanded condition; a second expansion element having a second uniform wall thickness (t′
) located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid by the first inflation lumen, and being expandable from a radially collapsed condition to a radially expanded condition, wherein the first wall thickness (t) of the first expansion element is smaller than the second wall thickness (t′
) of the second expansion element; andan 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. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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2. 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 made from a first material and located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid by a first inflation lumen, and expandable from a radially collapsed condition to a radially expanded condition, the first material having a first radial resistance to expansion; a second expansion element made from a second material and located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid by the first inflation lumen, and being expandable from a radially collapsed condition to a radially expanded condition, the second material having a second radial resistance to expansion, wherein the first radial resistance to expansion is smaller than the second radial resistance to expansion; 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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Specification