公开(公告)号：US07211084B2

公开(公告)日：2007-05-01

申请号：US11210671

申请日：2005-08-25

申请人： Colin Charles Owen Goble ,  Kester J. Batchelor ,  Mark G. Marshall

发明人： Colin Charles Owen Goble ,  Kester J. Batchelor ,  Mark G. Marshall

IPC分类号： A61B18/14

CPC分类号： A61B18/14 ,  A61B18/1402 ,  A61B2018/00005 ,  A61B2018/00023 ,  A61B2018/126 ,  A61B2018/1412

摘要： An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes (2 and 3) are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least 50° C. is established between the first and second electrodes (2 and 3), such that the second electrode is maintained below a temperature of 70° C. This is achieved either by thermally insulating the second electrode from the first electrode, and/or by transferring heat away from the second electrode, e.g. by conduction, forced cooling, or by means of a heat pipe (27).

摘要翻译： 电外科切割刀片（1）包括第一电极（2），第二电极（3）和分离第一和第二电极的电绝缘体（4）。 第一和第二电极具有不同的特性（横截面积，热导率等），使得第一电极（2）被鼓励成为有源电极，并且第二电极（3）被鼓励成为返回电极。 第一和第二电极之间的间隔（0.25mm和3.0mm）和提供给电极（2和3）的峰值电压都被选择为使得电弧不直接发生在电极之间，而是在第一电极和 组织在目标部位。 该布置使得在使用中，在第一和第二电极（2和3）之间建立至少50℃的热差，使得第二电极保持在70℃以下的温度。这是 通过将第二电极与第一电极热绝缘，和/或通过将热量从第二电极传递，例如， 通过传导，强制冷却，或通过热管（27）。