Patent ID: 7819868
Filing Date: 2010-10-26
Classification: A61B

Abstract:
1. A catheter with a distal ablation electrode section, the catheter comprising: a proximal section; an ablation section at a distal end of the catheter; a catheter wall defining at least one fluid lumen extending from the proximal section to the ablation section; an electrode lead positioned within the at least one fluid lumen extending within the ablation section; at least one dispersion opening within the catheter wall in the ablation section oriented longitudinally along a length of the ablation section, wherein the at least one dispersion opening is in fluid communication with the at least one fluid lumen; a porous layer covering the at least one dispersion opening; and a length of mesh material generally coextensive with and positioned adjacent to the at least one dispersion opening on the opposing side of the at least one dispersion opening from the at least one fluid lumen, the mesh material also configured as an electrode, and the mesh material covering the porous layer and configured to allow fluid under pressure to flow through the at least one dispersion opening; wherein the porous layer is interposed both between the mesh material and the at least one dispersion opening and between the mesh material and the outer surface of the catheter adjacent the at least one dispersion opening.