Surgical instrument for applying ligating clips
In a surgical instrument for applying C-shaped ligating clips having two juxtaposed legs which are joined to each other by a bridge portion and are each divided by a longitudinal slot into two juxtaposed portions joined to each other at the free end of the legs, the surgical instrument comprising two juxtaposed clamping jaws with guiding surfaces facing each other for the legs of a ligating clip that lie against the guiding surfaces when the ligating clip is inserted between the clamping jaws, in order to improve the positioning of the ligating clip between the clamping jaws, it is proposed that there be arranged on at least one of the guiding surfaces of the clamping jaws an inwardly protruding projection which, when the ligating clip is advanced along the guiding surfaces, elastically enters the longitudinal slot of the ligating clip.
1. Surgical instrument for applying C-shaped ligating clips in combination with C-shaped ligating clips, comprising:
a cartridge adapted to be inserted into said surgical instrument;
a plurality of C-shaped ligating clips arranged in the cartridge, each of the C-shaped ligating clips comprising two juxtaposed legs which are joined to each other by a bridge portion, the legs defining an open distal end opposite the bridge portion, each of the ligating clips being divided by a longitudinal slot into two juxtaposed portions joined to each other at distal free ends of the legs,
said surgical instrument comprising:
two juxtaposed clamping jaws with respective guiding surfaces facing each other for the legs of one of the ligating clips that lies against the guiding surfaces when the ligating clip is inserted between the clamping jaws, the two juxtaposed clamping jaws being adapted to close the open distal end of the ligating clip by advancing the distal free ends of the legs towards each other; and
an inwardly protruding projection arranged on at least one of the guiding surfaces of the clamping jaws which, when the ligating clip is advanced along the guiding surfaces, elastically enters the longitudinal slot of the ligating clip.
2. Surgical instrument in accordance with claim 1 , wherein the projection, upon entering the longitudinal slot, comes into abutment against the two juxtaposed portions of the leg.
3. Surgical instrument in accordance with claim 2 , wherein the projection, upon entering the longitudinal slot, comes into abutment, in a longitudinal direction of the longitudinal slot, with various points and/or over a continuous area with juxtaposed portions of the leg.
4. Surgical instrument in accordance with claim 2 , wherein the projection is of permanently projecting construction, and the legs of the ligating clip are adapted for pivotal movement elastically relative to each other.
5. Surgical instrument in accordance with claim 1 , wherein the projection is elastically displaceable against that clamping jaw on which it is mounted.
6. Surgical instrument in accordance with claim 5 , wherein the projection is constructed as a resilient tongue.
7. Surgical instrument in accordance with claim 1 , wherein the projection is of permanently projecting construction, and the legs of the ligating clip are adapted for pivotal movement elastically relative to each other.
8. Surgical instrument in accordance with claim 1 , wherein the projection is integrally formed on the clamping jaws.
9. Surgical instrument in accordance with claim 1 , wherein the projection is a separate component which is joined to the clamping jaw.
10. Surgical instrument in accordance with claim 9 , wherein the projection is a metallic strip extending along the longitudinal slot.
11. Surgical instrument in accordance with claim 1 , wherein the projection has at a distal end an end surface extending transversely to a direction of advance of the ligating clip.
12. Surgical instrument in accordance with claim 1 , wherein a depth of entry of the projection into the longitudinal slot of the ligating clip is maximally as large as a material thickness of the legs in an area of entry of the projection.
13. Surgical instrument in accordance with claim 1 , wherein the legs of the ligating clip diverge from the bridge portion to the free ends of the legs, so that the legs abut only at the free ends against the guiding surfaces of the clamping jaws.