Spring-closing endoscopic clip where the spring action can also reverse the clip prior anytime before full ejection
View Patent ↗Endoscopic surgery clips are dispensed out of an endoscopic catheter that has restriction provisions that cooperate with spring-biased jaw-clenching provision(s) that are provided to the clips. The cooperation between the restrictions of the catheter and spring-biased jaw-clenching provisions of the clips cooperate to facilitate reversal of the lead clip to-be-ejected, prior anytime before full ejection past the dispensing end of the endoscopic catheter, and at least partially reversed back into the lumen therefor in the endoscopic catheter.
1. Endoscopic surgery clip-dispensing apparatus, comprising:
an elongated dispensing sleeve extending rearwardly from a dispensing end, the sleeve defining:
an elongated lumen;
a left L-shaped opening on a left side of the sleeve having: a left enlarged closed end, a left open slot and a left opening into the left open slot from the left enlarged closed end; the left open slot extending from the left opening to a left front opening on the dispensing end of the sleeve;
a right L-shaped opening on a right side of the sleeve, the right side of the sleeve being diametrically opposed to the left side of the sleeve, the right L-shaped opening having: a right enlarged closed end, a right open slot and a right opening into the right open slot from the right enlarged closed end; the right open slot extending from the right opening to a right front opening on the dispensing end of the sleeve;
a left ramp constriction disposed in the lumen on the left side of the sleeve rearward of the left L-shaped opening and a right ramp constriction disposed in the lumen on the right side of the sleeve rearward of the right L-shaped opening;
wherein the left and right enlarged closed ends are characterized by a major width and the left and right open slots are characterized by a minor width;
an elongated clip having:
a tail end;
a left arm extending from the tail end having: a left rear half loop portion, a left crossover portion, and a first forward portion; wherein the left crossover portion is between the left rear half loop portion and the first forward portion; wherein the first forward portion comprises a first enlarged tab formation and a first jaw terminating in a first tip end;
a right arm extending from the tail end having: a right rear half loop portion, a right crossover portion, and a second forward portion; wherein the right crossover portion is between the right rear half loop portion and the second forward portion; wherein the second forward portion comprises a second enlarged tab formation and a second jaw terminating in a second tip end;
wherein the clip is configured to be loaded into the lumen such that the tail end is rearward of the left and right ramp constrictions;
wherein the left and right rear half loop portions have a first width and the left and right crossover portions have a second width, the first second widths being less than the minor width; the first and second enlarged tab formations have a third width that is greater than the minor width and less than the major width;
the tail end and the left and right ramp constrictions being configured such that the tail end can pass by the left and right ramp constrictions during use of the apparatus.
2. The endoscopic surgery clip-dispensing apparatus of claim 1 , further comprising:
a plurality of the clips loaded in the lumen in a series.
3. The endoscopic surgery clip-dispensing apparatus of claim 2 , wherein:
the plurality of clips includes a trailing most clip, and
the apparatus further comprising a plunger for applying a forward pressure on the trailing most clip of the plurality of clips.
4. The endoscopic surgery clip-dispensing apparatus of claim 1 , wherein:
the left and right crossover portions overlap and are positioned in spaced parallel planes;
the left and right crossover portions each have an outer surface that serves as a compressive cam surface when pushed past the left and right ramp constrictions respectively.
5. The endoscopic surgery clip-dispensing apparatus of claim 1 , wherein:
the apparatus is configured such that the second and first enlarged tab formations egress out of the lumen though the left and right enlarged closed ends respectively as a portion portion of each of the second and first jaws egress out of the lumen through the left and right open slots respectively.
6. The endoscopic surgery clip-dispensing apparatus of claim 1 , wherein:
the tail end is produced of a resilient material and serves as a spring-biased fulcrum providing jaw-clenching pressure to the clip.
7. The endoscopic surgery clip-dispensing apparatus of claim 1 , wherein:
the left enlarged closed end is defined in part by a left rear edge extending between and intersecting a pair of left side edges and a solid left shoulder extending from one of the pair of left side edges, the left shoulder being spaced from the left rear edge;
the right enlarged closed end is defined in part by a right rear edge extending between and intersecting a pair of right side edges and a right shoulder extending from one of the pair of right side edges, the right shoulder being spaced apart from the right rear edge; and
the first and second enlarged tab formations are wedge-shaped, the first enlarged tab formation including a first spreading cam surface, the second enlarged tab formation including a second spreading cam surface; the first and second spreading cam surfaces configured for engaging the right and left shoulders respectively to thereby open the first and second tip ends outside of the dispensing end of the sleeve.
8. The endoscopic surgery clip-dispensing apparatus of claim 7 , wherein:
the tail end is formed of a resilient material and serves as a spring-biased fulcrum providing jaw-clenching pressure to the clip;
the sleeve further comprises a left pair of spreading bearing surfaces along a side of the left open slot and a right pair of spreading bearing surfaces along a side of the right open slot,
the first enlarged tab formation comprises a first rear end and the second enlarged tab formation comprises a second rear end;
the second and first enlarged tab formations are configured such that when pushed past the left and right shoulders respectively, the second enlarged tab formation rides on the left pair of spreading bearing surfaces and the first enlarged tab formation rides on the right pair of spreading bearing surfaces until the second and first rear ends clear the dispensing end to allow the second and first jaws to swing shut due to the spring-biased fulcrum of the tail end.