Electrosurgical probe for tumor treatment by radiofrequency
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United States of America Patent
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Sep 23, 2003
Grant Date -
N/A
app pub date -
Jan 18, 2002
filing date -
Jul 21, 1999
priority date (Note) -
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Abstract
An electrosurgical probe including a metal cannula, partially provided with an electroinsulating coating, and filiform electrodes housed in the cannula in a stretched position. The filiform electrodes are provided with an elastic memory of an arched shape and as a result, come out from the cannula to occupy a limited, nearly spherical volume. The electrodes are fixed to the distal end of a control rod slidably arranged inside the cannula so that the electrodes in a stretched position are arranged side by side parallel with the control rod. The cannula includes a series of holes each positioned immediately under the free ends of the filiform electrodes and having a sufficient diameter for the passage of a respective one of the electrodes. The electrodes are removed from the cannula by pulling the control rod and retracted into the cannula by pushing the control rod.
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