Patent ID: 8951250
Filing Date: 2015-02-10
Classification: A61B

Abstract:
1. An ablation device comprising: a cannula having a distal tip and a lumen extending within the cannula and terminating in an opening at the distal tip; a second shaft having a distal tip and a lumen, the second shaft at least partially disposed within the cannula lumen and deployable from the distal tip opening, the second shaft slidable relative to the cannula; a first shaft having a distal tip, the first shaft at least partially disposed within the lumen of the second shaft, the first shaft slidable relative to the second shaft; a first array of electrodes secured to the distal tip of the fist shaft, the first array of electrodes having a first configuration when inside the lumen of the second shaft, and a second configuration when fully deployed outside the lumen of the second shaft, wherein the electrodes of the first array have a parabolic profile when in the second configuration; a second array of electrodes secured to the distal tip of the second shaft, the second array of electrodes having first configuration when inside the cannula lumen, and a second configuration when fully deployed outside the cannula lumen, wherein the electrodes of the second array have a flared curvilinear profile when in the second configuration; and wherein the first array of electrodes has a first radius of span when fully deployed in the second configuration and the second array of electrodes has a second radius of span when fully deployed in the second configuration, wherein the first radius of span is different from the second radius of span.