Articulating surgical instrument
A surgical instrument for use with a robotic manipulator includes an end effector assembly having one or two end effector members, each having a distal treatment end, a proximal end, and a tendon pass-through. Tendons that provide both mechanical actuation and electrical conduction to the end effector members are positioned in the pass-throughs.
1. A method of assembling an electrosurgical instrument, comprising:
providing a cable formed of a conductive inner portion coated with a dielectric polymer;
providing a jaw having a cable pass-through, the jaw formed of a conductive material, the cable pass-through having an edge;
extending the cable through the pass-through, and crimping the cable using compression, wherein during compression of the cable the edge of the pass-through geometry pierces the dielectric polymer coating, creating electrical contact between the conductive inner portion and the jaw while simultaneously creating a mechanical connection between the conductive inner portion of the cable and the jaw.
2. The method of claim 1 , wherein the pass-through includes an opening and wherein the edge includes an element extending into the opening, and wherein during compression of the cable the element pierces the dielectric polymer coating.
3. The method of claim 2 , wherein the element is a sharp element.
4. The method of claim 2 , wherein the element is shaped to be sufficiently sharp to pierce the dielectric polymer coating during crimping.
5. The method of claim 2 , wherein the element extends radially into the opening.
6. The method of claim 1 , wherein the jaw has a pivot axis, and wherein creating the mechanical connection includes positioning the mechanical connection such that application of tension to the cable causes the jaw to pivot relative to the pivot axis.