Device and method for multi-phase radio-frequency ablation

Details Device and method for multi-phase radio-frequency ablation Device and method for multi-phase radio-frequency ablation

A - Human Necessities

61

N

A61N 1/06 (2006.01) A61B 18/12 (2006.01) A61B 18/14 (2006.01) A61N 1/40 (2006.01) A61B 18/00 (2006.01)

Patent

CA 2112821

Multi-phase RF ablation employing a two-dimensional or three-dimensional electrode array (501) products a multitude of currents paths on the surface of the ablation zone. This results in a uniform lesion with a size defined by the span of the electrode array. An orthogonal electrode catheter array suitable for cardiac ablation is used in conjunction with a two-phase RF power source to produce uniform square-shaped lesions of size 1,2 cm2. Lesions of larger size are created by successive adjacent placement of the square-shaped lesions. A temperature sensor (531) at the electrode tip allows monitoring of ablation tem- perature and regulation thereof to minimize the electrode tips from being fouled by coagulum.

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