Method and apparatus for performing cardiac ablations

A - Human Necessities – 61 – B

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

Patent

CA 2374302

A device, and method for performing cardiac ablations includes a therapeutic instrument, for example, an ablation catheter (10), to which is mounted a flexible, and braided electrode (14). The electrode configuration is selected so that it has a desired surface area for proper heat convection properties. RF energy (26) is delivered to the electrode to heat, thereby ablate local heart tissue, with the electrode having good convection abilities to protect against coagulation, embolisms, and other undesirable effects of ablation procedures.

L'invention concerne un nouveau dispositif et une nouvelle méthode pour effectuer des ablations sur le coeur; le dispositif comprend, par exemple, un instrument thérapeutique tel qu'un cathéter d'ablation sur lequel est montée une électrode souple tressée. La forme de l'électrode est choisie de manière à ce que celle-ci possède une surface désirée assurant des propriétés voulues de convection de chaleur. On applique à l'électrode une énergie HF pour chauffer et, partant, pour enlever par ablation un tissu cardiaque local, l'électrode possédant de bonnes propriétés de convection qui protègent contre la coagulation, les embolies et les autres effets indésirables des opérations d'ablation.

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