Tissue ablation device assembly and method for electrically isolating a pulmonary vein ostium from an atrial wall
First Claim
1. A tissue ablation system for treating atrial arrhythmia by ablating a circumferential region of tissue at a location where a pulmonary vein extends from an atrium, comprising:
- a delivery member with a proximal end portion and a distal end portion having a longitudinal axis and a radial axis; and
a circumferential ablation member coupled to the distal end portion and having a plurality of splines, each with a proximal end portion and a distal end portion, and also having one or more ablation elements each supported along a support region of one of the splines, wherein the plurality of splines are circumferentially spaced around the longitudinal axis, each of the splines being adjustable between a first condition and a second condition wherein the respectively supported ablation element is adjustable between a first radial position and a second radial position, wherein each spline in the first condition is substantially radially collapsed and extends substantially along the longitudinal axis such that the circumferential ablation member is adapted to be delivered through a delivery sheath into the atrium, and in the second condition the support region of each spline extends at least in part radially away from the longitudinal axis such that each of the individual ablation elements is held by the supporting spline in the second radial position with the one or more ablation elements being spaced along a circumferential pattern that surrounds the longitudinal axis, said circumferential pattern being configured such that the one or more ablation elements is adapted to engage and ablate the circumferential region of tissue when the splines are adjusted to the second condition at the location.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention is related to a tissue ablation system and method that treats atrial arrhythmia by ablating a circumferential region of tissue at a location where a pulmonary vein extends from an atrium. The system includes a circumferential ablation member with an ablation element and also includes a delivery assembly for delivering the ablation member to the location. The circumferential ablation member is generally adjustable between different configurations to allow both the delivery through a delivery sheath into the atrium and the ablative coupling between the ablation element and the circumferential region of tissue.
-
Citations
18 Claims
-
1. A tissue ablation system for treating atrial arrhythmia by ablating a circumferential region of tissue at a location where a pulmonary vein extends from an atrium, comprising:
-
a delivery member with a proximal end portion and a distal end portion having a longitudinal axis and a radial axis; and
a circumferential ablation member coupled to the distal end portion and having a plurality of splines, each with a proximal end portion and a distal end portion, and also having one or more ablation elements each supported along a support region of one of the splines, wherein the plurality of splines are circumferentially spaced around the longitudinal axis, each of the splines being adjustable between a first condition and a second condition wherein the respectively supported ablation element is adjustable between a first radial position and a second radial position, wherein each spline in the first condition is substantially radially collapsed and extends substantially along the longitudinal axis such that the circumferential ablation member is adapted to be delivered through a delivery sheath into the atrium, and in the second condition the support region of each spline extends at least in part radially away from the longitudinal axis such that each of the individual ablation elements is held by the supporting spline in the second radial position with the one or more ablation elements being spaced along a circumferential pattern that surrounds the longitudinal axis, said circumferential pattern being configured such that the one or more ablation elements is adapted to engage and ablate the circumferential region of tissue when the splines are adjusted to the second condition at the location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A tissue ablation system for ablating a circumferential region of tissue comprising:
-
a delivery member with a proximal end portion and a distal end portion having a longitudinal axis and a radial axis; and
a circumferential ablation member coupled to the distal end portion and having a plurality of splines, each with a proximal end portion and a distal end portion, and also having one or more ablation elements each supported along a support region of one of the splines, wherein the plurality of splines are circumferentially spaced around the longitudinal axis, each of the splines being adjustable between a first condition and a second condition wherein the respectively supported ablation element is adjustable between a first radial position and a second radial position.
-
-
18. A circumferential ablation member comprising:
-
A plurality of splines circumferentially spaced around a longitudinal axis, each of the splines being adjustable between a first condition and a second condition;
and one or more ablation elements each supported along a support region of one of the splines, wherein the respectively supported ablation element is adjustable between a first radial position and a second radial position when the supporting spline is adjusted between the first condition and the second condition.
-
Specification