Electrode needle with radiofrequency active filament

A - Human Necessities – 61 – N

Patent

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Details

A61N 1/04 (2006.01) A61B 18/14 (2006.01) A61B 18/18 (2006.01) A61N 1/06 (2006.01)

Patent

CA 2361777

Electrode needle for the treatment of parenchymatous tumours through radiofrequency-induced interstitial hyperthermy, comprising a hollow guide needle (11) and a radiofrequency 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 position into the needle, to a spiral shape when the filament is in the active forward position.

Aiguille-électrode pour le traitement de tumeurs parenchymateuses par hyperthermie interstitielle induite par radiofréquences. L'aiguille-électrode comporte une aiguille guide creuse (11) et un filament actif à radiofréquences (12) fileté dans l'aiguille, qui peut être raccordé à un générateur de radiofréquences et qui peut être déplacé de façon axiale entre une position inactive, où le filament est rétracté dans l'aiguille, et une position active, où un segment terminal du filament sort de l'extrémité distale de l'aiguille. Le segment terminal (13) du filament est formé de façon à pouvoir passer d'une forme rectiligne lorsque le filament est dans la position rétractée dans l'aiguille à une forme spiralée lorsque le filament est en position active (sorti de l'aiguille).

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