Patent ID: 9144459
Filing Date: 2015-09-29
Classification: A61B,A61N

Abstract:
1. A radiofrequency tissue ablation device comprising: an elongate outer cannula including a cannula proximal end, a cannula distal end, and a cannula intermediate length between the proximal end and distal end, where a longitudinal region of the intermediate length near the distal end is configured as an ablation electrode and including a cannula lumen extending longitudinally through the length of the cannula; and an elongate stylet extending slidably through the cannula lumen and secured to the cannula between the ablation electrode and the cannula distal end; where the ablation electrode includes a plurality of substantially parallel helical apertures disposed around a circumference of the outer cannula, the apertures extending through the cannula; where the ablation electrode is circumferentially expandable such that