Patent ID: 7993333

Claim:
A device comprising: an elongate catheter body comprising a proximal end and a distal end; and an umbrella tip body mounted at the distal end of the elongate catheter body, the umbrella tip body being movable between an expanded configuration and a contracted configuration, the umbrella tip body comprising: a central post extending from the distal end of the elongate catheter body and comprising a top portion; and a plurality of outer arms connected to the top portion of the central post, each of the plurality of outer arms comprising a first portion connected to a second portion at a hinge, the first portion comprising at least two sets of at least two conductive elements, wherein the at least two sets are separated by a first gap distance and the at least two conductive elements are separated by a second gap distance smaller than the first gap distance, the at least two sets being substantially coplanar in the expanded configuration; and wherein the umbrella tip body is configured to contact a tissue region and produce a shaped ablation lesion within the tissue region.