Triple balloon catheter
First Claim
1. A cryogenic device for treating a pulmonary vein ostium, the cryogenic device defining a longitudinal axis and comprising:
- a first substantially non-compliant balloon defining an anterior face and a posterior face, the anterior face lying in a plane that is at least substantially orthogonal to the longitudinal axis of the cryogenic device;
a second substantially compliant balloon positioned distal to the first balloon, the second balloon defining an anterior face and a posterior face; and
a third substantially compliant balloon surrounding the first and second balloons,at least a portion of the anterior face of the first balloon being in contact with at least a portion of the posterior face of the second balloon when the first and second balloons are in an inflated state, the third balloon being sufficiently compliant to conform to at least a portion of the anterior face of the first balloon to enhance thermal transfer from the anterior face of the first balloon to the third balloon.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention advantageously provides a method and system for cryogenically ablating large areas of tissue within the left atrium. In an exemplary embodiment a cryotherapy device includes a catheter body, a proximal end and a distal end; a first lumen; a second lumen; and an ablation element expandable from a first diameter to a second diameter, the ablation element having a surface portion that conforms to the uneven surface topography of the cardiac tissue. The ablation element can include one or more deformable balloon and/or flexible elements. The surface of the balloon can further be shaped by regulation of pressure within the one or more balloons. In an exemplary method, a tissue ablation device is provided and tissue in the left atrium is ablated with the device, whereby the ablation is created by freezing tissue.
-
Citations
15 Claims
-
1. A cryogenic device for treating a pulmonary vein ostium, the cryogenic device defining a longitudinal axis and comprising:
-
a first substantially non-compliant balloon defining an anterior face and a posterior face, the anterior face lying in a plane that is at least substantially orthogonal to the longitudinal axis of the cryogenic device; a second substantially compliant balloon positioned distal to the first balloon, the second balloon defining an anterior face and a posterior face; and a third substantially compliant balloon surrounding the first and second balloons, at least a portion of the anterior face of the first balloon being in contact with at least a portion of the posterior face of the second balloon when the first and second balloons are in an inflated state, the third balloon being sufficiently compliant to conform to at least a portion of the anterior face of the first balloon to enhance thermal transfer from the anterior face of the first balloon to the third balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A medical system, comprising:
-
a flexible catheter body defining a longitudinal axis; a first balloon disposed on the catheter body, the first balloon defining an anterior face and a posterior face, the anterior face lying in a plane that is at least substantially orthogonal to the longitudinal axis of the flexible catheter body; a second balloon disposed distally of the first balloon, wherein the second balloon is more readily deformable than the first balloon and defines an anterior face and a posterior face; and a third balloon substantially enclosing the first and second balloons to define an interstitial region therebetween, at least a portion of the anterior face of the first balloon being in contact with at least a portion of the posterior face of the second balloon when the first and second balloons are in an inflated state, the third balloon being sufficiently compliant to conform to the anterior face of the first balloon to enhance thermal transfer from the anterior face of the first balloon to the third balloon. - View Dependent Claims (11, 12, 13, 14, 15)
-
Specification