Patent ID: 8926602
Filing Date: 2015-01-06
Classification: A61B

Abstract:
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.