Selectively locking device

• US 20040102789A1
• Filed: 11/22/2002
• Published: 05/27/2004
• Est. Priority Date: 11/22/2002
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Baughman, Tyler
• Application Number:
  US10/302,410
• Publication Number:
  US 20040102789A1
• Time in Patent Office: Days
• US Class Current: 606/99
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/015 Stop means therefor
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: Y10T 70/50 Special application

Abstract

A locking element comprising a frame defining a central lumen through which a portion of the elongate member fits; one or more levers extending in the second direction from the frame able to be moved between a locking position and a releasing position; and one or more tabs extending in the first direction from the frame able to be moved by the one or more levers between a locked position and a released position; wherein when the locking element is disposed on an enabling elongate member in a second direction from a second cross section, the one or more tabs prevent the locking element from moving in a first direction beyond a first cross section when disposed in the locked position and do not prevent the locking element from moving in the first direction when disposed in the released position.

Claims

1. A locking element for locking a medical device to an elongate member having a central longitudinal axis and a first cross section having a first perimeter and a second cross section having a second perimeter where a portion of the second perimeter is closer to the central longitudinal axis than a portion of the first perimeter, the locking element comprising:

a frame defining a central lumen through which a portion of the elongate member fits;

one or more levers extending in the second direction from the frame able to be moved between a locking position and a releasing position; and

one or more tabs extending in the first direction from the frame able to be moved by the one or more levers between a locked position and a released position;

wherein when the locking element is disposed on the elongate member in the second direction from the second cross section, the one or more tabs prevent the locking element from moving in the first direction beyond the first cross section when disposed in the locked position and do not prevent the locking element from moving in the first direction when disposed in the released position.

2. The element of claim 1, wherein the locking element is monolithic.

3. The element of claim 2, wherein when the one or more levers is in the second direction from the second cross section, there is a gap between the one or more levers and a portion of the elongate member in a second direction from the second cross section.

4. The element of claim 3, wherein the gap between the one or more levers and the elongate member increases in the second direction when the one or more levers are in the locked position.

5. The element of claim 1, wherein when the tabs are in the locked position, a portion of the one or more tabs cannot fit outside the first perimeter.

6. The element of claim 1, wherein when the locking element is disposed on the elongate member in the second direction from the second cross section, the levers are closer to the elongate member in the releasing position than in the locking position and the tabs are closer to the elongate member in the locked position than in the released position.

7. The element of claim 6, wherein moving the levers from the locking position to the releasing position causes the tabs to be moved from the locked position to the released position.

8. The element of claim 1, wherein the one or more levers and the one or more tabs are equal in number.

9. The element of claim 8, wherein each of the one or more tabs extend from the frame at a position opposite one of the tabs.

10. The element of claim 1, wherein the locking element further comprises struts to connect the locking element to a medical device.

11. The element of claim 10, wherein the struts are attached to the central element.

12. The element of claim 10, wherein struts extend in a second direction from the locking element.

13. The element of claim 12, wherein the struts are attached to the levers.

14. The element of claim 1, wherein the locking element comprises a flexible material.

15. The element of claim 14, wherein the locking element comprises a super-elastic material.

16. The element of claim 15, wherein the locking element comprises a nickel-titanium alloy.

17. The element of claim 1, wherein the one or more levers and the one or more tabs are uniformly distributed around the frame.

18. The element of claim 1, wherein the one or more tabs comprise two opposing tabs and the one or more levers comprise two opposing levers.

19. The element of claim 1, wherein the one or more tabs comprise three equally spaced tabs and the one or more levers comprise three equally spaced levers.

20. The element of claim 1, wherein the one or more levers can be actuated by an object moving in the second direction.

21. The element of claim 1, wherein the one or more tabs are biased to the locked position.

22. The element of claim 1, wherein the one or more levers are biased to the locking position.

23. The element of claim 1, wherein the medical device is a filter.

24. The element of claim 1, wherein the element further comprises one or more radiopaque bands.

25. The element of claim 1, wherein the element further comprises one or more radiopaque longitudinal stripes.

26. The element of claim 1, wherein the one or more levers comprise two or more levers, further comprising

two or more centering arms attached to the two or more levers such that when the levers are moved to the releasing position, the two or more centering arms position the elongate member centrally with respect to the element.

27. An apparatus for selectively locking a medical device, comprising

an elongate member having a central longitudinal axis and a first cross section having a first perimeter and a second cross section having a second perimeter where a portion of the second perimeter is closer to the central longitudinal axis than a portion of the first perimeter and having one or more surfaces in the second direction from the first cross section adapted for receiving one or more tabs;

and

a locking element having a frame defining a central lumen through which a portion of the elongate member fits, one or more levers extending in the second direction from the frame able to be moved between a locking position and a releasing position, and one or more tabs extending in the first direction from the frame able to be moved by the one or more levers between a locked position and a released position;

wherein a portion of the elongate member in the second direction from the first cross section is adapted for receiving one or more of the tabs and when the locking element is disposed on the elongate member in the second direction from the second cross section, the one or more tabs prevent the locking element from moving in the first direction beyond the first cross section and prevent the locking device from rotating about the elongate member when disposed in the locked position and do not prevent the locking element from moving in the first direction when disposed in the released position.

28. The apparatus of 27, wherein the elongate member further comprises one or more longitudinal radiopaque stripes.

29. The apparatus of 27, wherein the one or more surfaces are flat.

30. The apparatus of 27, wherein the one or more surfaces have a central portion and one or more longitudinal ridges adjacent thereto.

31. The apparatus of 30, wherein each central region of the one or more surfaces have two longitudinal ridges adjacent thereto.

32. The apparatus of 27, wherein the one or more surfaces conform to the tabs.

33. The apparatus of 27, wherein the one or more surfaces have a central region and one or more longitudinal grooves adjacent thereto.

34. The apparatus of 27, wherein each central region of the one or more surfaces have two longitudinal grooves adjacent thereto.

35. The apparatus of 27, wherein the elongate member has a stop near the end in the second direction.

36. A process for releasably locking a medical device on an elongate member, comprising:

providing an elongate member having a central longitudinal axis and a first cross section having a first perimeter and a second cross section having a second perimeter where a portion of the second perimeter is closer to the central longitudinal axis than a portion of the first perimeter;

providing a locking element having a frame defining a lumen through which a portion of the elongate member may fit, one or more levers extending from the frame in the second direction able to be actuated between a locking position and a releasing position, and one or more tabs extending in the first direction from the frame able to be actuated by the one or more levers between a locked position and a released position; and

advancing the locking element on the first end of the elongate member in the second direction beyond the first cross section.

37. The process of claim 36, wherein when the locking element is advanced beyond the first cross section, the one or more tabs move to the locked position.

38. The process of claim 36, further comprising the steps of:

actuating the levels to the releasing position; and

advancing the locking element in the first direction past the first cross section.

39. The process of claim 36, wherein the step of providing an elongate member further includes providing one or more surfaces on the elongate member in the second direction from the first cross section adapted to receive one or more tabs and wherein the step of advancing the locking element further includes the step of rotating the locking element so that one of the tabs aligns with one of the surfaces such that when the tabs are in the locked position, the locking device is prevented from rotating with respect to the elongate member.

40. The process of claim 39, wherein the step of providing one or more surfaces further includes the step of providing one or more flat surfaces.

41. The process of claim 39, wherein the step of providing one or more surfaces further includes the step of providing one or more surfaces having a center portion and one or more longitudinal ridges adjacent the center portion.

42. The process of claim 41, wherein the step of providing one or more surfaces further includes the step of providing center surfaces which are flat.

43. The process of claim 41, wherein the step of providing one or more surfaces further includes the step of providing center surfaces which conform to the tabs.

44. The process of claim 41, wherein the step of providing one or more surfaces further includes the step of providing two adjacent longitudinal ridges.