Dynamic heating mehtod and radio frequency thermal treatment

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/12 (2006.01) A61B 18/14 (2006.01) A61N 1/40 (2006.01)

Patent

CA 2232651

A method and system for the delivery of radiofrequency energy to the tissue, particularly, the prostate, to alleviate the symptoms of BPH is disclosed. The system incorporates a bipolar or multipolar electrode array to create an electric field where the heat created is confined solely to a specific volume of the prostate gland and therefore the heated tissue is defined only by the electrode geometry. The bipolar electrode array provides a variety of three dimensional, symmetric heating patterns within the prostatic tissue depending on the relative electrode lengths and angular separation. The system provides precision tissue temperature and impedance measurements thereby enabling the surgeon to accurately predict heating pattern performance and tissue response to RF heating.

Cette invention concerne une méthode et un système d'application d'énergie radioélectrique à un tissu du corps humain, en particulier à la prostate, pour atténuer l'hypertrophie bénigne. Le système comprend un réseau d'électrodes bi ou multipolaires servant à produire un champ électrique générant de la chaleur dans un volume précis de la prostate de sorte que le tissu chauffé est délimité exclusivement par la distribution géométrique des électrodes. Le réseau d'électrodes bipolaires offre la possibilité de plusieurs configurations tridimensionnelles symétriques de chauffe à l'intérieur du tissu glandulaire selon la longueur relative des électrodes et leur séparation angulaire. Le système assure une mesure précise de l'élévation de la température du tissu et de son impédance, ce qui permet au chirurgien de prévoir avec précision la configuration de chauffe ainsi que la réaction du tissu à la radiothérapie.

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