ATRIAL ANNULUS ABLATION DEVICE

摘要

A medical balloon catheter assembly includes a balloon having a permeable region and a non-permeable region. The balloon is constructed at least in part from a fluid permeable tube such that the permeable region is formed from a porous material which allows a volume of pressurized fluid to pass from within a chamber formed by the balloon and into the permeable region sufficiently such that the fluid may be ablatively coupled to tissue engaged by the permeable region. The non-permeable region is adapted to substantially block the pressurized fluid from passing from within the chamber and outwardly from the balloon. Such voids may be created by expanding the fluoropolymer. The porous material extends along both the permeable and non-permeable regions. In one mode of this construction, the material is porous along the permeable region and non-porous along the non-permeable region, such as by expanding only the permeable region. The pores may also be provided along both permeable and non-permeable sections but are blocked with a dip coated, deposited, or extruded insulator material along the non-permeable section in order to prevent fluid from passing therethrough. The insulator material may in one mode be provided in many shapes on the surface of the balloon.