System for heating solid tissues and use of same

Details System for heating solid tissues and use of same System for heating solid tissues and use of same

A - Human Necessities

61

B

A61B 18/14 (2006.01) G06F 19/00 (2006.01)

Patent

CA 2303187

Methods for heating tissue by delivering radio frequency energy through tissue electrodes (104) comprise controlling energy delivery so that an abrupt increase in impedance between the electrodes (104), and the tissue (T) is observed typically in the form of an abrupt decrease in power delivered to the electrodes (104). The power at which the impedance increases and/or the time required to induce such an increase in impedance are relied on to determine acceptable ranges to achieve a maximum sustainable delivery of radio frequency energy to the tissue (T) consistent with complete, rapid, and uniform heating of the tissue (T).

Cette invention se rapporte à des procédés servant à chauffer des tissus en leur appliquant une énergie haute fréquence par l'intermédiaire d'électrodes (104) placées sur ces tissus. Ces procédés consistent à réguler l'application d'énergie, pour qu'une augmentation abrupte d'impédance entre les électrodes (104) et les tissus (T) soit observée, cette augmentation se manifestant généralement sous la forme d'une baisse abrupte de la puissance appliquée aux électrodes (104). On se fonde sur la puissance à laquelle l'impédance augmente et/ou sur la période requise pour induire une telle augmentation d'impédance afin de déterminer les limites acceptables entre lesquelles peut être obtenue une application maximum supportable d'énergie haute fréquence aux tissus (T) en cohérence avec un chauffage complet, rapide et uniforme des tissus (T).

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