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    • 2. 发明授权
    • Electrosurgical instrument reducing current densities at an insulator conductor junction
    • 电外科仪器降低绝缘体导体结处的电流密度
    • US08267935B2
    • 2012-09-18
    • US11732556
    • 2007-04-04
    • Gary M. CoutureRobert M. SharpCraig Weinberg
    • Gary M. CoutureRobert M. SharpCraig Weinberg
    • A61B18/14
    • A61B18/1442A61B2017/0088A61B2017/2945A61B2018/00083A61B2018/00107A61B2018/1432
    • An electrosurgical instrument having opposing end effectors and a handle for effecting movement of the end effectors relative to one another, includes a pair of electrodes each including an electrically conductive surface (e.g., which can be dimensioned for sealing, clamping and/or cutting), an insulating substrate having a first edge, and an insulating layer positioned in a channel formed by the electrically conductive surface within the first edge between the conductive surface and the first edge of the insulating substrate. The insulating layer has a portion proximal to the electrically conductive surface and a portion distal from the electrically conductive surface and a gradient such that the proximal portion has a lower dielectric strength than the distal portion. A coating on one of the pair of electrodes may be disposed in at least partial non-vertical registration with a coating on the opposing one of the pair of electrodes.
    • 具有相对的末端执行器和用于实现端部执行器相对于彼此的移动的手术的电外科器械包括一对电极,每对电极包括导电表面(例如,其尺寸可用于密封,夹紧和/或切割) 具有第一边缘的绝缘基板和位于导电表面与绝缘基板的第一边缘之间的第一边缘内的由导电表面形成的通道中的绝缘层。 绝缘层具有靠近导电表面的部分和远离导电表面的部分,并且梯度使得近端部分具有比远端部分更低的介电强度。 一对电极中的一个上的涂层可以布置成与该对电极中相对的一个电极上的涂层至少部分非垂直配准。