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    • 10. 发明申请
    • Electrosurgical instrument
    • 电外科器械
    • US20030144652A1
    • 2003-07-31
    • US10291286
    • 2002-11-09
    • James A. BakerCsaba TruckaiJohn H. Shadduck
    • A61B018/04
    • A61B18/082A61B17/32A61B18/08A61B18/1442A61B2018/00404A61B2018/00601A61B2018/00619A61B2018/087A61B2018/1455A61B2218/002
    • A working end of a surgical instrument that carries first and second jaws for delivering energy to tissue. In a preferred embodiment, at least one jaw of the working end defines a tissue-engagement plane that contacts the targeted tissue. The cross-section of the engagement plane reveals that it defines (i) a first surface conductive portion or a variably resistive matrix of a temperature-sensitive resistive material or a pressure-sensitive resistive material, and (ii) a second surface portion coupled to a fixed resistive material that coupled in series or parallel to a voltage source together with the first portion. In use, the engagement plane will apply active Rf energy to ohmically heat the captured tissue until the point in time that a controller senses an electrical parameter of the tissue such as impedance. Thereafter, the controller switches energy delivery to the second surface portion that is resistively heated to thereby apply energy to tissue by conductive heat transfer.
    • 手术器械的工作端,其携带用于将能量递送至组织的第一和第二钳口。 在优选实施例中,工作端的至少一个钳口限定了接触目标组织的组织接合平面。 接合平面的横截面显示其限定(i)温度敏感电阻材料或压敏电阻材料的第一表面导电部分或可变电阻矩阵,以及(ii)第二表面部分 与第一部分一起串联或并联耦合到电压源的固定电阻材料。 在使用中,接合平面将施加活性Rf能量以欧姆加热所捕获的组织,直到控制器感测组织的电参数(例如阻抗)的时间点为止。 此后,控制器将能量输送切换到被电阻加热的第二表面部分,从而通过导热传递将能量施加到组织。