Patent ID: 8728073
Filing Date: 2014-05-20
Classification: A61B

Abstract:
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; an elastic contact member located along the distal end portion, the contact member having a circumferential wall and being expandable from a radially collapsed condition to a radially expanded condition, the contact member including a single chamber having a single bulbous section, the single bulbous section having a proximal region, a distal region and an intermediate region there between, a portion of the intermediate region having a thickened section along the circumferential wall, the thickened section configured to constrain a portion of the circumferential wall and prevent the single bulbous section from uniformly expanding and forming a spherical or conical shape when in the radially expanded condition; and an ablation element having an ablative energy source that is located along the distal end portion, wherein the ablation element cooperates with the contact member such that the ablative energy source emits a substantially circumferential pattern of energy through the circumferential wall.