| 主权项 |
1. An electrode in an electrosurgical probe, the electrode comprising
two arms defining a longitudinal direction, a loop extending laterally from the two arms and defining a cutting area within the loop, the loop including a lowest point which is furthest from the two arms, and an electrically conductive vaporisation member attached to one side of the loop and electrically connected thereto such that when the loop is supplied with RF energy the vaporisation member is also energised, the vaporisation member including an upper surface and a lower surface and first and second opposing edges, the vaporisation member terminating at the first edge thereof adjacent the loop and then extending upwardly and longitudinally away from the lowest point of the loop so as to terminate at the second edge thereof at a height between the arms and the lowest point of the loop and with the second edge extending from one side of the loop to the other via a point that is longitudinally displaced from the loop, whereby the vaporisation member is such that in use the upper surface thereof does not occlude the cutting area and the lower surface presents a tissue-contacting vaporisation surface when the electrode is moved axially in the longitudinal direction, the arrangement being such that when the electrode is energised and moved in a first longitudinal direction, the loop is capable of resecting a sample of tissue, the resected tissue passing through the cutting area and being guided upwardly by the upper surface of the vaporisation member away from the loop, and when the electrode is energised and moved in the opposite longitudinal direction, the vaporisation member is capable of vaporising tissue adjacent to the lower surface thereof to form a groove therein. |
