A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 18/18 (2006.01)
Patent
CA 2611952
An array of ring electrodes (38) or a wire electrode is mounted about the outside surface of the distal end (12) of the ablation catheter (22). Substantially all of the outer surface of each ring (38) or wire electrode is covered by an electrically insulating coating (44). The insulating surface coating (44) on each ring (38) defines a contoured opening (40) in the insulating surface coating (44) that exposes the conductive band or wire beneath. An array of contoured openings (40) are formed along a wire electrode. The insulating coating (44) mitigates potential edge effects that create hot spots and can result in unwanted tissue damage during an ablation procedure.
Dans la présente invention, un réseau d'électrodes circulaires (38) ou un fil-électrode est installé au niveau de la surface externe de l'extrémité distale (12) du cathéter d'ablation (22). Sensiblement toute la surface externe de chaque électrode circulaire (38) ou du fil-électrode est recouverte d'un revêtement isolant électrique (44). Le revêtement (44) de surface isolant présent sur chaque électrode circulaire (38) définit une ouverture profilée (40) dans le revêtement (44) de surface isolant qui laisse à nu la bande conductrice ou le fil sous-jacent. Un réseau d'ouvertures profilées (40) limite les effets de bord potentiels qui créent des taches de chaleur et peuvent provoquer des dommages tissulaires indésirables pendant une procédure d'ablation.
Dando Jeremy D.
Blake Cassels & Graydon Llp
Inc. St. Jude Medical Atrial Fibrillation Division
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