DEVICES AND METHODS FOR RADIOFREQUENCY ABLATION

摘要

Various embodiments are described herein for an extendable electrode configured to receive and conduct radiofrequency discharges for heating a target tissue site, a device for deploying the extendable electrode, and an apparatus for deploying the extendable electrode. Methods for use of the device and apparatus in radiofrequency ablation are described. In various embodiments, the extendable electrode is a coil electrode. Embodiments are described wherein the electrode, device, apparatus, and methods provide radiofrequency ablation treatment of intervertebral discs.

主权项

1. A device for providing radiofrequency current to a target tissue site, the device comprising:
a cannula having a proximal end and a distal end and a longitudinal axis therebetween, the distal end comprising a tip; a first electrode configured to conduct and discharge radiofrequency current for heating the target tissue site, the first electrode disposed within the cannula and having a retracted position within the longitudinal axis of the cannula and a deployed position outside the tip of the cannula; an adjustment member disposed at or near the proximal end of the cannula, the adjustment member configured to engage the first electrode in the retracted position or the deployed position; a second electrode disposed within the cannula and configured to conduct radiofrequency from the target tissue site; and an insulation material disposed about the first electrode and configured to reduce or prevent conduction of radiofrequency current in the cannula.