Surgical clip and clip manipulation device therefor
Some embodiments relate to a clip comprising: a base portion; first and second opposed arms coupled to the base portion; and first and second opposed jaws coupled to the respective first and second arms, the first and second opposed jaws each having an inwardly extending portion that extends towards the base portion; wherein at least the base portion is formed of a shape memory alloy tending to force the first and second arms toward each other when a temperature of the base portion meets or exceeds a transformation temperature of the base portion.
1. A clip comprising:
a base portion;
first and second opposed arms coupled to the base portion; and
first and second opposed jaws coupled to the first and second arms, respectively, the first and second opposed jaws each having an inwardly extending portion that has a free end that extends towards the base portion when the jaws are in an open position;
wherein each jaw comprises an inner tissue engaging surface, and the engaging surfaces of the jaws are generally parallel and opposed to one another when the jaws are in a closed position;
wherein at least the base portion is formed of a shape memory alloy tending to force the first and second arms toward each other and toward the closed position when a temperature of the base portion meets or exceeds a transformation temperature of the base portion;
wherein the first and second jaws each have free end portions extending away from the base portion, the free end portions being distal of the inwardly extending portions;
wherein the free end of each inwardly extending portion curves toward the respective first and second arms in a proximal direction; and
wherein the first and second jaws are separable to adopt the open position in which the jaws are acutely angled relative to each other.
2. The clip of claim 1 , wherein an outer surface of the clip along the base portion and the first and second opposed arms is generally smooth.
3. The clip of claim 1 , wherein the clip is formed of biologically inert materials.
4. The clip of claim 1 , wherein the end portions extending away from the base portion have rounded tips.
5. The clip of claim 1 , wherein in the open position, the jaws do not contact each other.
6. The clip of claim 1 , wherein when a shape memory of the base portion is activated by heating the base portion, the base portion tends to force the first and second jaws toward the closed position.
7. The clip of claim 6 , wherein, in the closed position, the inwardly extending portions do not contact each other.
8. The clip of claim 1 , wherein at least the base portion is formed of nitinol.
9. The clip of claim 1 , wherein the base portion, the arms and the jaws comprise the same material.
10. The clip of claim 1 , wherein the base portion, the arms and the jaws are integrally formed.
11. The clip of claim 1 , wherein the first and second jaws have perturbations formed along at least part of the inner engaging surfaces.
12. The clip of claim 1 , wherein the base portion defines at least one land for contact with a temperature modification element.
13. The clip of claim 12 , wherein the at least one land comprises opposed lands and the clip can be held for surgical application by gripping the opposed lands.
14. A cartridge comprising a plurality of the clips of claim 1 .
15. The cartridge of claim 14 , wherein the plurality of clips are held in the cartridge in an open position.
16. A kit comprising at least one clip, wherein the at least one clip comprises the clip of claim 1 , the kit further comprising a clip manipulator, the clip manipulator comprising:
at least one arm to hold one of the at least one clip, and
at least one thermoelectric transducer to impart a temperature change to the base portion of the at least one clip sufficient to cause the temperature of the base portion to meet or exceed the transformation temperature.
17. The kit of claim 16 , wherein the at least one arm comprises two arms.
18. The kit of claim 16 , wherein the at least one thermoelectric transducer is coupled to a distal end of the at least one arm or each of the at least one arm.
19. The kit of claim 16 , wherein the at least one thermoelectric transducer is operable to cool or heat the base portion.
20. The kit of claim 16 , wherein the at least one thermoelectric transducer comprises at least one Peltier element.
21. The kit of claim 16 , wherein the at least one arm of the clip manipulator comprises a distal pair of opposed jaws arranged with one thermoelectric transducer on each jaw, wherein the opposed jaws of the clip manipulator are useable to simultaneously grip the base portion of the clip and impart the temperature change thereto.