Electrosurgical apparatus and methods for laparoscopy
First Claim
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1. An electrosurgical apparatus for treating tissue at a target site, comprising:
- a shaft having a shaft distal end and a shaft proximal end;
an electrically insulating electrode support disposed at the shaft distal end;
a plurality of active electrodes arranged substantially parallel to each other on the electrode support, wherein the shaft comprises an inner shaft and an outer sheath, wherein a proximal portion of the inner shaft lies within the outer sheath, and a distal portion of the inner shaft extends distally from the outer sheath; and
wherein the distal portion of the inner shaft is exposed and comprises a return electrode spaced proximal from the plurality of active electrodes.
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Abstract
Electrosurgical methods and apparatus for treating tissue at a target site of a patient. An electrosurgical instrument includes a shaft, having a shaft distal end and a shaft proximal end, and an electrode assembly disposed at the shaft distal end. The electrode assembly includes at least one active electrode disposed on an electrode support. The instrument is adapted for coupling to a high frequency power supply or electrosurgical generator. Each active electrode is adapted for removing tissue from a target site and/or for localized coagulation of the target tissue. In one embodiment, the instrument is adapted for laparoscopic procedures.
385 Citations
23 Claims
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1. An electrosurgical apparatus for treating tissue at a target site, comprising:
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a shaft having a shaft distal end and a shaft proximal end; an electrically insulating electrode support disposed at the shaft distal end; a plurality of active electrodes arranged substantially parallel to each other on the electrode support, wherein the shaft comprises an inner shaft and an outer sheath, wherein a proximal portion of the inner shaft lies within the outer sheath, and a distal portion of the inner shaft extends distally from the outer sheath; and wherein the distal portion of the inner shaft is exposed and comprises a return electrode spaced proximal from the plurality of active electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An electrosurgical instrument, comprising:
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a shaft having a shaft distal end, the shaft distal end having a plurality of longitudinal, external grooves; an electrode assembly disposed at the shaft distal end; and an electrically insulating sheath external to the shaft distal end, the sheath and the plurality of grooves jointly defining a corresponding plurality of fluid delivery channels external to the shaft distal end, each of the plurality of fluid delivery channels adapted as a fluid conduit. - View Dependent Claims (20, 21, 22, 23)
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Specification