| 摘要 |
<p>A surgical instrument which has a frame, an elongated shaft, an end effector with first and second jaws for clamping tissue, a post cooperatively engaged with the proximal end of the second jaw received in a slot on the sidewall of a channel included as part of the first jaw, a pusher member affixed to the proximal end of the second jaw, and an actuator to effect movement of the pusher member from a forward position to a rearward position, is disclosed. When the pusher member moves rearwardly, the post rides in the slot in the sidewall and the second jaw moves from a closed position where it is adjacent the first jaw for clamping tissue to an open position for placing tissue between the jaws. The combination of cooperating elements of the instrument provides a convenient and simple mechanism for clamping or grasping tissue between the jaws. This mechanism decreases the force necessary to clamp the tissue and utilizes more of the effective length of the second jaw. These benefits in turn make it easier for the user of the instrument to clamp tissue and reduces the tendency of the second jaw to flex or twist during clamping, therefore providing the user with even greater control over the surgical procedure. Overall, the clamping or grasping mechanism incorporated into the surgical instrument provides an attractive alternative to the conventional prior art mechanisms for accomplishing these functions. <IMAGE></p> |
