Surgical instrument

The invention discloses a surgical instrument, particularly a surgical forceps including an end effector assembly having first and second jaw members configured to grasp tissue therebetween and conduct energy through tissue grasped therebetween to treat tissue. An insulative tubular member is movable relative to the end effector assembly between a retracted position, wherein the insulative tubular member is positioned proximally of the end effector assembly, and an extended position the insulative tubular member is disposed about the end effector assembly. A monopolar member is selectively deployable relative to the end effector assembly from a first position to a second position, wherein, in the second position, a portion of the monopolar member extends distally from the end effector assembly and the insulative tubular member for applying energy to tissue to treat tissue. 本发明公开种手术器械，特别是钳子，其包括端部执行器组件，所述端部执行器组件具有第和第二钳口构件，所述钳口构件构造成将组织抓持在其间并且传导能量通过抓持在其间的组织，以治疗组织。绝缘管状构件能够相对于端部执行器组件在缩回位置和延伸位置之间运动，在所述缩回位置中，绝缘管状构件定位