Electrode needle with radiofrequency active filament
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United States of America Patent
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Nov 25, 2003
Grant Date -
May 16, 2002
app pub date -
Nov 8, 2001
filing date -
Nov 10, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
Electrode needle for the treatment of parenchymatous tumours through radiofrequency-induced interstitial hyperthermy, comprising a hollow guide needle (11) and a radiofrequnecy active filament (12) threaded into the needle, connectable to a radiofrequency generator and capable of axial movements between an inactive position retracted into the needle and an active position of protrusion of a terminal segment of the filament from the distal end of the needle, characterised in that said terminal segment (13) of the filament is shaped to pass from a rectilinear shape when the filament is in retracted into the needle, to a spiral shape when the filament is in the active forward position.
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