Patent ID: 8216226
Filing Date: 2012-07-10
Classification: A61B

Abstract:
1. A radiofrequency ablation device comprising: an elongate cannula having a lumen disposed interiorly of an external wall, the elongate cannula including a plurality of slots formed within the external wall and providing access to the lumen; and an electrode member slidably disposed within the elongate cannula, the electrode member including a plurality of tines configured for passage through the plurality of slots, wherein the plurality of slots are disposed in a staggered arrangement about the external wall of the cannula, wherein the plurality of tines and the plurality of slots are configured such that a seal is formed between an exterior surface of the tines and an interior surface of the slots, wherein the slots comprise flared passageways, wherein each of the passageways comprises a portion that is closest to the interior lumen of the cannula and a portion that is furthest from the interior lumen of the cannula, and wherein a diameter of the portion that is closest to the interior lumen is different from a diameter of the portion that is furthest from the interior lumen.