Surgical devices and methods for tissue cutting and sealing

    公开(公告)号:US10010366B2

    公开(公告)日:2018-07-03

    申请号:US14573074

    申请日:2014-12-17

    摘要: Surgical devices and methods are described herein that provide energy density control during tissue sealing. In general, these devices include a handle portion, an elongate shaft, and an end effector having a first jaw having a first tissue engaging surface and a second jaw having a second tissue engaging surface. The first tissue engaging surface can include an energy delivering electrode having a selected pattern of varying conductivity which may include a discrete region or a continuous pattern. The energy delivering electrode may be formed from a polymer substrate that includes a metal. The metal may be mixed into the substrate using an ion beam process. The amount of ions in the ion beam, the energy of the ion beam, or both may be varied to create the selected pattern of varying conductivity.

    Electrosurgical instrument and system

    公开(公告)号:US10004554B2

    公开(公告)日:2018-06-26

    申请号:US14281087

    申请日:2014-05-19

    发明人: David Morris

    摘要: An electrosurgical instrument includes an instrument shaft, a suction tube extending along the shaft, and a tissue treatment electrode at the distal end of the shaft. The tissue treatment electrode includes at least a first part and a second part, the first and second parts each having an outer section including mating surfaces adapted to form a close-fitting barrier when the first and second parts are mated one with another, such as to inhibit the passage of gas across the barrier. At least one of the parts also includes an inner section with a longitudinal recess so as to form a suction lumen when the first and second parts are mated one with another. The suction lumen is in fluid communication with the suction tube, the tissue treatment electrode also including one or more apertures in communication with the suction lumen.