Electrosurgical system with uniformly enhanced electric field and minimal collateral damage
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United States of America Patent
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Apr 15, 2008
Grant Date -
Nov 25, 2004
app pub date -
Feb 13, 2004
filing date -
Feb 14, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is directed towards an electrosurgical cutting system. The system comprises an electrically conductive blade, having first and second blade surfaces. First and second insulators are affixed to the first and second blade surfaces, respectively. A blade edge, a region between the first and second blade surfaces, has an edge radius of curvature, which preferably is small. A source of pulsed electrical energy coupled to the electrically conductive blade provides a substantially uniform and highly enhanced electric field along a cutting portion of the blade edge.The system can also be comprised of a wire electrode. Despite the fact that its field is strongly enhanced around the apex, a uniform vapor cavity is formed and then ionized using an appropriately designed burst of pulses, preferably of alternating polarity.
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