Surgical ablation probe for forming a circumferential lesion

Details Surgical ablation probe for forming a circumferential lesion Surgical ablation probe for forming a circumferential lesion

A - Human Necessities

61

B

A61B 18/00 (2006.01) A61B 17/32 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2411938

This invention is a circumferential ablation device assembly which is adapted to form a circumferential conduction block in a pulmonary vein. The assembly generally comprises a handheld surgical ablation probe having a rigid shaft for insertion through a patient's chest and a circumferential ablation element mounted on the distal end portion of the shaft. The circumferential ablation element is adapted to ablate a circumferential region of tissue along a pulmonary vein wall which circumscribes the pulmonary vein lumen. The circumferential ablation element includes an expandable member for anchoring the distal end portion of the shaft in a body structure and an ultrasound transducer disposed within the expandable member for emitting ultrasonic energy to ablate the tissue in the pulmonary vein.

La présente invention concerne un ensemble à dispositif d'ablation circulaire qui est conçu pour réaliser un bloc de conduction circulaire dans une veine pulmonaire. L'ensemble comprend généralement une sonde d'ablation chirurgicale se tenant à la main et comportant une tige rigide s'insérant au travers de la cage thoracique du patient et un élément d'ablation circulaire monté sur l'extrémité distale de la tige. L'élément d'ablation circulaire est conçu pour faire l'ablation d'une région circulaire de tissu dans la longueur d'une paroi de veine pulmonaire circonscrivant la lumière de la veine pulmonaire. L'élément d'ablation circulaire inclut, d'une part un élément expansible servant à ancrer l'extrémité distale de la tige dans une structure anatomique, et d'autre part un transducteur à ultrasons disposé dans l'élément expansible de façon à émettre une énergie ultrasonique servant à l'ablation du tissu dans la veine pulmonaire.

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