Systems and methods for improving image-guided tissue ablation

A - Human Necessities – 61 – K

Patent

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A61K 9/50 (2006.01) A61B 18/02 (2006.01) A61F 7/00 (2006.01) A61K 49/22 (2006.01)

Patent

CA 2562699

The cryosurgical kit and method of use relates to the combined use of biodegradable, imageable, drug(s) carriers, vectors or microcapsules deposited into a target tissue region inside a body and the controlled cooling of the target tissue region. A minimally invasive method of treatment that applies a cooling device to a selected tissue region, uses a vibrating resonant frequency delivery device to inject drug(s) carriers (microcapsules) containing therapeutic and contrast agents into tissue region(s) submitted to cooling temperatures, successive real-time imaging of the microcapsule deposition and later detection of the progressive degradation of microcapsules with ultrasound imaging which provides estimation of sustained release rates and for planning re-dosing regimens. The thermosensitive microcapsules preferably contain ethiodol, a contrast agent for Ultrasound and/or X-Ray imaging, and cytotoxic drug (s).

Trousse cryochirurgicale et procédé d'utilisation associé à l'utilisation combinée de supports, vecteurs ou microcapsules biodégradables, photosensibles, médicamenteux déposés dans une zone tissulaire ciblée à l'intérieur du corps et au refroidissement contrôlé de cette zone tissulaire ciblée. Procédé de traitement minimalement invasif consistant à appliquer un dispositif de refroidissement à une zone tissulaire sélectionnée, à utiliser un dispositif d'application d'une fréquence résonante vibratoire afin d'injecter ces supports médicamenteux (microcapsules) contenant des agents de contraste et des agents thérapeutiques dans la ou les zones tissulaires soumises à des températures de refroidissement, à prendre des images successives en temps réel de la microcapsule déposée et à détecter ultérieurement la dégradation progressive de ces microcapsules au moyen d'une prise d'image ultrasonore permettant d'obtenir une évaluation des taux de libération prolongée et de planifier la modification de dosages. Ces microcapsules thermosensibles contiennent, de préférence, éthiodol, un agent de contraste d'imagerie ultrasons et/ou aux rayons X et un ou plusieurs médicaments cytotoxiques.

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