Systems for tissue ablation and aspiration
First Claim
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1. An electrosurgical instrument for removing tissue from a target site within or on a patient'"'"'s body comprising:
- a shaft having proximal and distal end portion and a single active electrode on the distal end portion;
a return electrode on the shaft spaced from the active electrode;
a plurality of electrical connectors extending through the shaft and adapted for coupling the active electrode with a high frequency power supply;
ballwires coupled to the electrical connectors and the active electrode for securing the active electrode to the shaft; and
an aspiration lumen within the shaft having a distal opening coupled to the single active electrode to inhibit clogging of the lumen.
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Abstract
The present invention provides systems and methods for selectively applying electrical energy to a target location within or on a patient'"'"'s body. In particular, methods and apparatus are provided for resecting, cutting, partially ablating, aspirating or otherwise removing tissue from a target site, and ablating the tissue in situ. The methods and systems of the present invention are particularly useful for removing tissue within joints, e.g., synovial tissue, meniscus, articular cartilage and the like.
421 Citations
15 Claims
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1. An electrosurgical instrument for removing tissue from a target site within or on a patient'"'"'s body comprising:
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a shaft having proximal and distal end portion and a single active electrode on the distal end portion;
a return electrode on the shaft spaced from the active electrode;
a plurality of electrical connectors extending through the shaft and adapted for coupling the active electrode with a high frequency power supply;
ballwires coupled to the electrical connectors and the active electrode for securing the active electrode to the shaft; and
an aspiration lumen within the shaft having a distal opening coupled to the single active electrode to inhibit clogging of the lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrosurgical instrument for removing tissue from a target site within or on a patient'"'"'s body comprising:
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a shaft having proximal and distal end portion and an active electrode on the distal end portion;
a return electrode on the shaft spaced from the active electrode;
an electrical connector extending through the shaft and adapted for coupling the active electrode with a high frequency power supply;
a ballwire coupled to the electrical connector and the active electrode for securing the active electrode to the shaft; and
an aspiration lumen within the shaft having a distal opening coupled to the active electrode to inhibit clogging of the lumen. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification