Abstract: A surgical cannula includes a sheath having proximal and distal ends, a member disposed within the sheath and movable longitudinally therein, the movable member having proximal and distal ends, and a surgical instrument operable by movement of the distal end of the movable member with respect to the distal end of the sheath. The cannula further includes an operating assembly comprising a body or handle which slidably receives a slide for movement longitudinally of the body. The body defines a generally cylindrical interior and the slide includes a pair of longitudinally spaced-apart walls having the same general shape as the cross section of the cylinder. The walls are provided with aligned apertures which rotatably receive a stem. The stem includes proximal and distal ends, and the proximal end of the movable member is fixedly attached to the distal end of the stem. The proximal end of the sheath is fixedly attached to the body portion of the handle.

Abstract: A surgical cannula includes a sheath having proximal and distal ends, a member disposed within the sheath and movable longitudinally therein, the movable member having proximal and distal ends, and a surgical instrument operable by movement of the distal end of the movable member with respect to the distal end of the sheath. The cannula further includes an operating assembly comprising a body or handle which slidably receives a slide for movement longitudinally of the body. The body defines a generally cylindrical interior and the slide includes a pair of longitudinally spaced apart walls having the same general shape as the cross section of the cylinder. The walls are provided with aligned apertures which rotatably receive a stem. The stem includes proximal and distal ends, and the proximal end of the movable member is fixedly attached to the distal end of the stem. The proximal end of the sheath is fixedly attached to the body portion of the handle.

Abstract: A rotatable endoscopic surgical snare having an operating loop which is rotatable about the longitudinal axis of a torque transmitting center member connecting the operating loop to an electrical power supply. The operating loop is retractable and protractable into and from a protective flexible sheath. The operating loop is formed of a resilient spiral sleeve through which a core member extends.