Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Thermal applicators
Patent
1995-06-07
1997-04-15
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Thermal applicators
607102, 607148, 606 31, 606 42, A61N 500
Patent
active
056204817
ABSTRACT:
Multi-phase RF ablation employing a two-dimensional or three-dimensional electrode array produces 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 cm.sup.2. Lesions of larger size are created by successive adjacent placement of the square-shaped lesions. A temperature sensor at the electrode tip allows monitoring of ablation temperature and regulation of thereof to minimize the electrode tips from being fouled by coagulum. In another embodiment, an external auxiliary electrode is used in combination with the catheter electrodes. This also produces lesions of greater depth. In yet another embodiment, ablation is performed with a sequence of elementary electrode-electrical configurations.
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Desai Jawahar M.
Nyo Htay L.
Kamm William E.
Schaetzle Kennedy J.
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