| 摘要 |
An apparatus for application of surgical clips includes: a body and a handle. The body supports a clip carrying channel having a distal window. A jaw assembly including first and second portions movable between spaced-apart and approximated positions. A feed bar having a distal window advances a clip to the jaw assembly while the jaw portions are in the spaced apart position. A rack having ratchet teeth is connected to an actuator. A pawl engages the ratchet teeth, the pawl being biased in the handle wherein as the actuator is moved longitudinally, the ratchet teeth are passed over the pawl. The pawl prevents return of the actuator before full advancement of the actuator. A lock out bar is connected to the clip pusher. The clip pusher moves distally each time a clip is released from the apparatus, and moves the lock out bar distally. When the lock out bar is in alignment with the distal window of the feed bar, the lock out bar is urged to a second position through the distal window by a spring to extend across the feed bar. The lock out bar in the second position prevents the actuator from moving proximally, thereby maintaining the pawl in engagement with the teeth of the rack, the pawl and rack preventing the actuator from moving longitudinally. |
