| 摘要 |
<p>An electrosurgical instrument for the removal of tissue polyps and the like is disclosed. It features a pair of conductive electrodes (22,32) for bipolar cutting of tissue of with at least one electrode moveable in relation to the other. These electrodes are mounted about an insulating plug (54), which is secured at the distal end of a tubular member (12). Pressure exerted by the thumb on one movable (58) of three holding loops (36,38,58) shifts the position of one electrode relative to the other. Upon application of RF voltage, the distance at which the electrodes are placed controls the amount of arcing which will occur between electrodes, when placed within a proper range. The electrodes are supplied with power from a standard RF energy source, controlled from a foot or hand switch. The insulating plug may further include metal traces (82,84) disposed on the peripheral surface. When energized, these traces function as a bipolar pair of electrodes for effecting electrocoagulation of tissue and blood. <IMAGE></p> |
