| 摘要 |
An electrosurgical wand comprising an elongate housing that defines a handle end and a distal end 108, a tubing member coupled to the elongate housing. A spacer 200 of non-conductive material disposed on the distal end 108. A conductive electrode 202 disposed on the spacer, the conductive electrode defines an outer perimeter. A first aperture 208 e.g. aspirator aperture, defined at least in part by the spacer, the first aperture fluidly coupled to the tubing member, wherein the first aperture defines a distal cross-sectional area 302, and wherein the first aperture defines a proximal cross-sectional area 304, the proximal cross-sectional area 304 closer along a flow path to the handle end than the distal cross-sectional area 302, and the distal cross sectional area 302 smaller than the proximal cross-sectional area 304.Tissue only needs to be broken into pieces just small enough to pass through the constriction of the distal section 302 of aperture 208. The aperture 208 opens or widens behind the distal section 302, and thus if tissue can fit through the distal section 302, the tissue is likely to transverse the entire aspiration path without clogging. |
