Patent ID: 9211156
Filing Date: 2015-12-15
Classification: A61B

Abstract:
1. A system for performing mapping and ablation functions, the system comprising: a catheter sized and shaped for vascular access and including an elongate body extending between a proximal end and a distal end and having at least one inner fluid lumen; a tip section positioned proximate to the distal end of the body, the tip section comprising an ablation electrode including a proximal portion and a distal portion, the distal portion having a distal end that is substantially planar, wherein the ablation electrode comprises an exterior wall that defines an open interior region within the ablation electrode; one or more mapping electrode structures exposed at the tip section, the one or more mapping electrodes structures disposed proximate the substantially planar distal end of the ablation electrode; a thermal mass disposed within the open interior region, the thermal mass comprising a proximal portion and a distal portion, wherein the distal portion is proximal to the substantially planar distal end of the ablation electrode; a fluid passageway defined through the thermal mass to enable cooling fluid to pass from the proximal portion of the thermal mass to the distal portion of the thermal mass, wherein a proximal end of the fluid passageway is open and a distal end of the fluid passageway is closed by the substantially planar distal end of the ablation electrode; and a cooling chamber in fluid communication with the at least one inner fluid lumen and the fluid passageway, and positioned proximally to the thermal mass.