Electrode for coagulation and resection

Details Electrode for coagulation and resection Electrode for coagulation and resection

A - Human Necessities

61

B

A61B 18/14 (2006.01)

Patent

CA 2263604

This invention is a surgical instrument electrode (24) having a tissue cutting edge (76) disposed along a front portion, a gap (51) having a depth extending along an axis passing through the front portion, and a rear portion wherein the depth terminates in a region between the front portion and the rear portion. With such an arrangement, relatively deep gaps (51) may be formed in the electrode (24) without requiring a corresponding increase in the bluntness of the tissue cutting edge (76). In addition, the electrode (24) has a cross- sectional shaped substantially continuously changing along a portion of the electrode (24) from a substantially circular cross section at a distal end to a substantially rectangular cross section along the tissue cutting edge (76). Due to the continuous nature of the change, undesirable electrical arcing due to the shape change is substantially reduced.

L'invention se rapporte à une électrode (24) pour instrument chirurgical, qui offre un bord (76) tranchant pour couper des tissus disposé le long d'une partie avant, un espace (51), dont la profondeur s'étend le long d'un axe passant à travers la partie avant, et une partie arrière où la profondeur termine dans une zone située entre la partie avant et la partie arrière. Dans cet ensemble, des espaces (51) relativement profonds peuvent être formés dans l'électrode (24) sans qu'il y ait besoin d'émousser davantage le bord (76) tranchant. En outre, l'électrode (24) a une forme à section transversale qui change sensiblement en permanence tout au long d'une partie de l'électrode (24), d'une section transversale sensiblement circulaire à une extrémité distale jusqu'à une section transversale sensiblement rectangulaire le long du bord (76) tranchant. Etant donné que ce changement est continu, la formation non souhaitée d'un arc électrique due au changement de la forme est sensiblement réduit.

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