| 摘要 |
A bipolar electrosurgical instrument comprising at least three elelectrodes (12, 20, 24) having distal ends that are disposed at successive, axially spaced regions in a distal region of the instrument so that bipolar energizing potential (received by proximal ends of the electrodes) causes energizing current (70) to flow axially between the electrodes in the distal region. The instrument can be curved, (16) or not. In another aspect the instrument comprises at least two electrodes (72, 74) having distal ends disposed at an oblique angle with respect to the longitudinal axis of the instrument. Either instrument is useful in eye surgery to form a drainage path through the sclera to relieve symptoms of glaucoma. During the surgical procedure, the distal tip of the instrument (18) is inserted into the eye through an incision made remotely to a puncture site (50) where the drainage path (52) will be formed and is directed to the puncture site. |
