Electrosurgical instrument employing multiple positive temperature coefficient electrodes
    10.
    发明授权
    Electrosurgical instrument employing multiple positive temperature coefficient electrodes 有权
    电手术仪器采用多个正温度系数电极

    公开(公告)号:US08926607B2

    公开(公告)日:2015-01-06

    申请号:US12797288

    申请日:2010-06-09

    IPC分类号: A61B18/18 A61B18/14 A61B18/00

    摘要: An electrosurgical surgical instrument can comprise a handle and an end effector, wherein the end effector can comprise first and second jaws which can be opened and closed in order to capture tissue therebetween. In various embodiments, the first and second jaws can comprise one or more electrodes configured to apply a voltage across the tissue, wherein one or both of the first and second jaws can include a plurality of electrodes each comprised of a positive temperature coefficient material having a different switching temperature. The electrical resistances of the electrodes can increase significantly once the temperature of the electrodes exceed their switching temperatures and, owing to the increased electrical resistance, the flow of current through the electrodes can be reduced and/or prevented. In various circumstances, the different switching temperatures of the electrodes can allow some of the electrodes to switch off before the other electrodes.

    摘要翻译: 电外科手术器械可以包括手柄和末端执行器,其中末端执行器可以包括可以打开和关闭的第一和第二钳口,以便在其间捕获组织。 在各种实施例中,第一和第二钳口可以包括被配置为在组织上施加电压的一个或多个电极,其中第一和第二钳口中的一个或两个可以包括多个电极,每个电极由正温度系数材料组成, 不同的开关温度。 一旦电极的温度超过其开关温度,电极的电阻可以显着增加,并且由于增加的电阻,可以减少和/或阻止通过电极的电流。 在各种情况下,电极的不同开关温度可允许一些电极在其它电极之前断开。