ELECTROSURGICAL ELECTRODE

摘要

An electrode for vaporising tissue comprises a head (26) supported by at least one externally insulated electrically conducting stem (27). The head (26) is typically a button electrode and is provided with a conductive portion (41) in which the surface of the button electrode is electrically conductive, and an insulated portion (37) in which the surface of the button electrode is non-conductive. The head is typically mounted on the stem (27) such that it is capable of rotating about the stem such that it can change its rotational orientation depending on the direction of movement of the electrode. Typically, the head (26) is asymmetrical such that it has a greater width in one direction as compared with another direction, such as having an oval cross-section. The head (26) is rotatable about the stem (27) such that, whichever the direction of movement of the electrode, the electrode orients itself such that it presents the greater width parallel to the direction of movement of the electrode.

主权项

1. An electrode for vaporising tissue comprising an elongate conductive lead, the lead defining an axis having a proximal direction and a distal direction, a stem depending from the lead at an angle to the axis, and a head supported by the stem, the head being in the form of a button and being provided with a conductive portion in which the surface of the button electrode is electrically conductive, and an insulated portion in which the surface of the button electrode is non-conductive, the electrode being such that when it is moved in the distal direction in contact with tissue the insulated portion is wholly proximal of the conductive portion.