Stent crimper apparatus with radiation shied

• US 6,309,383 B1
• Filed: 01/20/2000
• Issued: 10/30/2001
• Est. Priority Date: 01/20/2000
• Status: Expired due to Fees

• Current Assignee: Isostent, Inc. (Cardinal Health, Inc.)
• Original Assignee: Isostent, Inc. (Cardinal Health, Inc.)
• Inventors: Chang, Robert T., Turnlund, Todd H., Campbell, Thomas H.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): Ram, Jocelyn D
• Application Number:
  US09/488,187
• Time in Patent Office: 649 Days
• Field of Search: 606/108, 606/198, 606/1
• US Class Current: 606/1
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2210/0095 radioactive
• CPC Class Codes: B25B 27/146 Clip clamping hand tools
• CPC Class Codes: B25B 7/00 Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools implements for fastening, connecting, or tensioning wire or strip B25B25/00; adapted for other fitting or separating purposes B25B27/00; for marking animals A01K11/00; dentists' forceps A61C3/00; bending wire eyes B21F1/06; hand-held metal-shearing or metal-cutting devices B23D29/00; hand cutting tools B26B; for punching or perforating B26F1/36; devices for securing ends of binding material in bundling machines B65B13/24; specially designed for watch-making or comparable work G04D1/00

Abstract

A stent crimping apparatus for crimping a deformable radioactive stent onto a deployment device which includes a first jaw member defining a shielded first compression surface, and an opposed, second jaw member defining a shielded second compression surface oriented opposite the first compression surface. The first and second compression surfaces are adapted to collectively form an elongated guide bore formed for axial receipt of the deformable stent and the deployment device therein. To protect against exposure to the radioactive stent, a shield assembly is provided defining an opening into a bore therein which is formed and dimensioned for longitudinal receipt of the deformable stent in an uncrimped condition. A shield assembly defines an opening into the bore, and cooperates with the first and second jaw members to substantially prevent radioactive particles emitted by the radioactive stent from passing out of the crimping apparatus. An operating mechanism is operatively coupled to the first and second jaw members for selective movement between a loading condition and a crimping condition. In the loading condition, the uncrimped stent and the deployment device may be inserted through the opening and into the bore. In the crimping condition, the deformable stent is radially compressed onto the deployment device between the first and second compression surfaces.

Claims

1. A shielded stent crimping apparatus for crimping a deformable radioactive stent onto a deployment device comprising:

a first jaw member defining a shielded first compression surface;

an opposed, second jaw member defining a shielded second compression surface oriented opposite said first compression surface, said first and second compression surfaces being adapted to collectively form an elongated guide bore formed for axial receipt of said deformable stent and the deployment device therein;

a shield assembly defining an opening into said bore, and cooperating with the first and second jaw members to substantially prevent radioactive particles emitted by the radioactive stent from passing out of said crimping apparatus; and

an operating mechanism operatively coupled to said first and second jaw members for selective movement between a loading condition, enabling insertion of the deformable stent and the deployment device through said opening and into said bore, and a crimping condition, radially compressing said deformable stent onto the deployment device between the first and second compression surfaces.

2. The stent crimping apparatus according to claim 1 wherein,

said operating mechanism includes a pair of handle members movably coupled to one another for selective operation of said first and second jaw members between the loading condition and the crimping condition.

3. The stent crimping apparatus according to claim 2 wherein,

each said handle member includes a proximal portion formed for gripping thereof, and a distal portion coupled to a respective jaw member.

4. The stent crimping apparatus according to claim 3, wherein

at least one of said distal portions of said handle members are mounted to a coupling member for pivotal movement between the loading condition and the crimping condition.

5. The stent crimping apparatus according to claim 4, wherein

each of said distal portions of the first and second jaw members are pivotally mounted to the coupling member for independent pivotal movement thereof between the loading condition and the crimping condition.

6. The stent crimping apparatus according to claim 5, further including:

an alignment device cooperating with the handle members to align the first and second compression surfaces during pivotal movement of the first and second jaw members from the loading condition to the crimping condition.

7. The stent crimping apparatus according to claim 6, wherein

said handle members are pivotally mounted to said coupling member on a distal side of said first and second compression surfaces, and said alignment device cooperatively aligns said handle members on a proximal side of said first and second compression surfaces.

8. The stent crimping apparatus according to claim 4 wherein,

each said first and said second compression surface defines an elongated compression groove which cooperate to form the guide bore, and enable aligned compression of the deformable stent onto the deployment device when moved to the crimping condition.

9. The stent crimping apparatus according to claim 8 wherein,

each said compression groove is semi-cylindrical.

10. The stent crimping apparatus according to claim 9 wherein,

each said compression groove extends transversely across the handle members from one side to an opposite side thereof, and substantially parallel to a pivotal axis of said jaw members.

11. The stent crimping apparatus according to claim 3 wherein,

said operating mechanism further includes a biasing device adapted to bias the jaw members toward the loading condition.

12. The stent crimping apparatus according to claim 11 wherein,

said biasing device includes a compression spring cooperating with the handle members to urge the jaw members toward the loading condition.

13. The stent crimping apparatus according to claim 3, wherein

said shield assembly includes a first mating surface extending across said first jaw member adjacent to said bore, and an opposed second mating surface extending across said second jaw member adjacent to said bore and opposite said first mating surface, said first mating surface and said second mating surface cooperating in a manner substantially preventing the direct straight-line passage of radioisotopes emitted from the stent radially out of the bore of said shield assembly in the direction of said handle members when in the loading condition.

14. The stent crimping apparatus according to claim 13, wherein

said first mating surface defines a lip portion extending upwardly from said first compression surface, and said second mating surface defines a recess portion formed and dimensioned for receipt of said lip portion, in the crimping condition.

15. The stent crimping apparatus according to claim 14, wherein

each said first and said second compression surface defines an elongated compression groove which cooperate to form the guide bore, and enable aligned compression of the deformable stent onto the deployment device when moved to the crimping condition.

16. The stent crimping apparatus according to claim 14, wherein

said opposed mating surfaces are formed and dimensioned to cooperatively align the first and second compression surfaces during movement of the first and second jaw members from the loading condition to the crimping condition.

17. The stent crimping apparatus according to claim 1 wherein,

each said first and said second compression surface defines an elongated compression groove which cooperate to form the guide bore, and enable aligned compression of the deformable stent onto the deployment device when moved to the crimping condition.

18. The stent crimping apparatus according to claim 17 wherein,

each said compression groove is semi-cylindrical.

19. The stent crimping apparatus according to claim 1 wherein,

said shield assembly is integrally formed with said distal portions of said handle members so as to be sufficiently thick radially around said bore to substantially prevent penetration of radioactive particles out of the shield assembly which are emitted from the radioactive stent contained in the bore.

20. The stent crimping apparatus according to claim 1 wherein,

said shield assembly includes a proximal end cap portion positioned on one side of said first and second jaw members at proximal end of said bore, said proximal end cap portion defining said opening into said bore.

21. The stent crimping apparatus according to claim 20 wherein,

said proximal end cap portion is fixedly mounted to said first jaw member for fixed alignment of said opening with said first compression surface.

22. The stent crimping apparatus according to claim 21 wherein,

said second jaw member defines a proximal recess portion formed and dimensioned for sliding receipt of said proximal end cap portion therein during movement of said second jaw between said loading condition and said crimping condition.

23. The stent crimping apparatus according to claim 22 wherein,

said shield assembly further includes a distal end cap portion positioned on an opposite side of said first and second jaw members at distal end of said bore.

24. The stent crimping apparatus according to claim 23 wherein,

said distal end cap portion is fixedly mounted to said first jaw member, and

said second jaw member defines a distal recess portion formed and dimensioned for sliding receipt of said distal end cap portion therein during movement of said second jaw between said loading condition and said crimping condition.

25. The stent crimping apparatus according to claim 21 wherein,

said proximal end cap portion and a shoulder portion defining said proximal recess portion cooperatively contact in the crimping condition to limit the relative movement of said first jaw member and said second jaw member.

26. The stent crimping apparatus according to claim 20 further including:

a flexible crimp tube having a passage dimensioned for longitudinal receipt of the stent therein in the uncrimped condition, and an outer circumferential dimension formed for longitudinal sliding insertion through the shield assembly opening and into the bore thereof.

27. The stent crimping apparatus according to claim 26 wherein,

said crimp tube includes an end fitting configured to interference fit with the shield assembly opening.

28. The stent crimping apparatus according to claim 27 wherein,

the crimp tube passage is formed for sliding receipt of the deployment device through the end fitting and into the stent while in the uncrimped condition.

29. The stent crimping apparatus according to claim 1 further including:

a flexible crimp tube having a passage dimensioned for longitudinal receipt of the stent therein in the uncrimped condition, and an outer circumferential dimension formed for longitudinal sliding insertion through the shield assembly opening and into the bore thereof.

30. The stent crimping apparatus according to claim 29 wherein,

said crimp tube includes an end fitting configured to interference fit with the shield assembly opening.

31. The stent crimping apparatus according to claim 30 wherein,

the crimp tube passage is formed for sliding receipt of the deployment device through the end fitting and into the stent while in the uncrimped condition.