Electrosurgery with infiltration anesthesia

A - Human Necessities – 61 – B

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A61B 18/18 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2483256

Method for carrying out the recovery of an intact volume of tissue wherein a delivery cannula tip (22) is positioned in confronting adjacency with the volume of tissue to be recovered. The electrosurgical generator employed to form an arc at a capture component extending from the tip is configured having resistance-power profile which permits recovery of the specimen without excessive thermal artifact while providing sufficient power to sustain a cutting arc. For the recovery procedure, a local anesthetic employing a diluent which exhibits a higher resistivity is utilized and the method for deploying the capture component (200) actuation interspersed with pauses of duration effective to evacuate any accumulation or pockets of local anesthetic solution encountered by the cutting electrodes.

Cette invention concerne une méthode de récupération d'un volume intact de tissu selon laquelle une pointe de canule (22) est disposée contre le volume de tissu à récupérer. Le générateur pour électro-chirurgie utilisé pour former un arc au niveau du composant de saisie partant de la pointe est conçu pour présenter un profil résistance-puissance qui permet de récupérer le spécimen sans artéfact thermique excessif tout en fournissant suffisamment d'énergie pour maintenir un arc de coupe. Pour cette méthode de récupération, on utilise un agent anesthésiant local avec diluant à résistivité plus élevée. La mise en oeuvre du composant de saisie (20) repose sur la formation intermittente d'un arc de coupe entrecoupée de pauses d'une durée suffisante pour évacuer toute accumulation ou poche de solution anesthésiante locale rencontrée par les électrodes de coupe.

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