Method for administering thermotherapy to prevent the growth...

A - Human Necessities – 61 – B

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A61B 18/00 (2006.01) A61B 18/04 (2006.01) A61F 2/00 (2006.01) A61M 31/00 (2006.01) A61N 5/00 (2006.01) A61N 7/02 (2006.01)

Patent

CA 2498166

In order to reduce blood flow thereby accumulating additional equivalent thermal dose following the step of heating an organ or appendage by irradiating microwaves at the organ or appendage, the step of compressing the organ or aplpendage following the heating step is added to thertherapy treatment. In a preferred embodiment, the organ is the prostate and periodic prostate compression is employed to reduce the prostate blood flow thereby allowing chemotherapy, thermosensitive liposome-encapsulated chemotherapy, or gene therapy to accumulate in the prostate region during thermotherapy. Doppler ultrasound imaging may be used to measure tumor blood flow rate and then serve as real-time feedback to assist in adjusting the amount of balloon catheter inflation and to assess damage to the tumor vasculature during the treatment.

Pour réduire l'afflux de sang venant ajouter une dose thermique équivalente après chauffage d'un organe ou d'un appendice par irradiation aux de micro-ondes, on ajoute à la thermothérapie une opération de compression de l'organe ou de l'appendice en question après l'opération de chauffage. Dans un mode de réalisation préféré, l'organe est la prostate que l'on soumet à une compression périodique afin de réduire le flux de sang vers cette organe et rendre possible l'accumulation des effets d'une chimiothérapie, d'une chimiothérapie encapsulée dans des liposomes thermosensibles ou d'une thérapie génique dans la région de la prostate pendant la thermothérapie. On peut utiliser une imagerie ultrasonographique Doppler pour mesurer le flux sanguin dans la tumeur, puis en exploiter les résultats sous forme de rétroaction en temps réel pour mieux régler le gonflage du cathéter à ballonnet et évaluer les dégâts infligés au système vasculaire de la tumeur pendant le traitement.

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