Systems and methods systems related to electrosurgical wands with screen electrodes

摘要

An electrosurgical wand for treating tissue at a target site within or on a patient's body is described, having an elongate shaft with a handle and a distal end portion. The distal end portion has an active electrode, an insulative spacer body and a return electrode; the active electrode supported by the insulative spacer body and spaced away from the return electrode. The active electrode has both lateral and medial edge surfaces. The insulative spacer body has an aspiration cavity fluidly connected with an aspiration lumen, and at least one tapered aperture extending beyond at least one of the electrode medial edge surfaces and directed to the aspiration cavity.

主权项

1. An electrosurgical wand for treating tissue at a target site within or on a patient's body comprising:
an elongate shaft having a handle end and a distal end portion, the distal end portion comprising an active electrode, an insulative spacer body and a return electrode, wherein the active electrode is supported on the insulative spacer body and is spaced away from the return electrode; wherein the active electrode defines a peripheral edge surface; wherein the insulative spacer body defines an aspiration cavity fluidly connected with an aspiration lumen and terminating with a cavity aperture having a perimeter, wherein the active electrode partially cover the cavity aperture so as to define at least one aspiration aperture having an aspiration aperture perimeter that is defined by the cavity aperture perimeter and the active electrode peripheral edge surface.