IP Library › Granted Patent US 11,376,142

Granted Patent B2

US 11,376,142 · App. 16/799,233 · Granted Jul 5, 2022

Hybrid stent

Inventors: Michael A. Longo (Glenmoore, PA); William James Harrison (Signal Mtn, TN)

Assignee: Vesper Medical, Inc.

A61F2/91 A61F2/07 A61F2/89 A61F2/915 A61F2002/823 A61F2002/91575 A61F2250/0018 A61F2250/0036

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Quick Facts

Patent No.: US 11,376,142
App. No.: 16/799,233
Granted: Jul 5, 2022
Kind: B2

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Abstract

A stent includes a high radial force segment and a highly flexible segment, where the diameters of the high radial force segment and the highly flexible segment are substantially the same. The stent may further be placed with an additional stent segment, where the additional stent segment has a radial force similar to the radial force of the highly flexible force segment.

Claims (99)

1. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF2;

wherein F1<F2; and

wherein the first radial force RF1 is radial resistive force (ROF) and the second radial force RF2 is radial resistive force (ROF).

2. The stent of claim 1 , wherein the high radial force segment comprises a plurality of contiguous interconnected struts and the highly flexible segment comprises a plurality of contiguous interconnected struts.

3. The stent of claim 2 , wherein the high radial force segment has a proximal end and a distal end and the highly flexible region has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the highly flexible segment.

4. The stent of claim 3 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

5. The stent of claim 3 , wherein the proximal segment of the high radial force segment has a flare shape.

6. The stent of claim 1 , wherein the high radial force segment and the highly flexible segment comprises a single unitary tube.

7. The stent of claim 1 , wherein the high radial force segment has a diameter D1 in an expanded state and the highly flexible segment has a diameter D2 in an expanded state, and D1=D2 in an expanded state.

8. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF2;

wherein F1<F2; and

wherein the first radial force RF1 is chronic outward force (COF) and the second radial force RF2 is chronic outward force (COF).

9. The stent of claim 8 , wherein the high radial force segment comprises a plurality of contiguous interconnected struts and the highly flexible segment comprises a plurality of contiguous interconnected struts.

10. The stent of claim 9 , wherein the high radial force segment has a proximal end and a distal end and the highly flexible region has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the highly flexible segment.

11. The stent of claim 10 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

12. The stent of claim 10 , wherein the proximal segment of the high radial force segment has a flare shape.

13. The stent of claim 8 , wherein the high radial force segment and the highly flexible segment comprises a single unitary tube.

14. The stent of claim 8 , wherein the high radial force segment has a diameter D1 in an expanded state and the highly flexible segment has a diameter D2 in an expanded state, and D1=D2 in an expanded state.

15. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2; and

an additional stent segment, unconnected to the stent tube, the additional stent segment having an end region configured to overlap a portion of the highly flexible segment in vivo;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF2; and

wherein F1<F2.

16. The stent of claim 15 , wherein the high radial force segment comprises a plurality of contiguous interconnected struts and the highly flexible segment comprises a plurality of contiguous interconnected struts.

17. The stent of claim 16 , wherein the high radial force segment has a proximal end and a distal end and the highly flexible region has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the highly flexible segment.

18. The stent of claim 17 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

19. The stent of claim 17 , wherein the proximal segment of the high radial force segment has a flare shape.

20. The stent of claim 15 , wherein the high radial force segment and the highly flexible segment comprises a single unitary tube.

21. The stent of claim 15 , wherein the high radial force segment has a diameter D1 in an expanded state and the highly flexible segment has a diameter D2 in an expanded state, and D1=D2 in an expanded state.

22. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2;

a transition segment between the high radial force segment and the highly flexible segment and having a third radial force RF3, a flexibility F3 and a length L3;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF3>RF2;

wherein F1<F3<F2; and

wherein the first radial force RF1 is radial resistive force (ROF), the second radial force RF2 is radial resistive force (ROF) and the third radial force R3 is radial resistive force (ROF).

23. The stent of claim 22 , wherein the third radial force RF3 varies along the length L3 of the transition segment.

24. The stent of claim 22 , wherein the third flexibility F3 varies along the length L3 of the transition segment.

25. The stent of claim 22 , wherein the third radial force RF3 is constant along the length L3 of the transition segment.

26. The stent of claim 22 , wherein the third flexibility F3 is constant along the length L3 of the transition segment.

27. The stent of claim 22 , wherein the high radial force segment comprises a first plurality of contiguous interconnected struts, the highly flexible segment comprises a second plurality of contiguous interconnected struts, and the transition segment comprises a third plurality of interconnected struts.

28. The stent of claim 27 , wherein the high radial force segment has a proximal end and a distal end, the highly flexible region has a proximal end and a distal end, and the transition segment has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the transition segment and the distal end of the transition segment is contiguous with the proximal end of the highly flexible segment.

29. The stent of claim 28 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

30. The stent of claim 28 , wherein the proximal segment of the high radial force segment has a flare shape.

31. The stent of claim 22 , wherein the high radial force segment, the transition segment and the highly flexible segment comprises a single unitary tube.

32. The stent of claim 22 , wherein the high radial force segment has a diameter D1 in an expanded state, the highly flexible segment has a diameter D2 in an expanded state, the transition segment has a diameter D3, and D1=D2=D3 in an expanded state.

33. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2;

a transition segment between the high radial force segment and the highly flexible segment and having a third radial force RF3, a flexibility F3 and a length L3;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF3>RF2;

wherein F1<F3<F2; and

wherein the first radial force RF1 is chronic outward force (COF), the second radial force RF2 is chronic outward force (COF), and the third radial force RF3 is chronic outward force (COF).

34. The stent of claim 33 , wherein the third radial force RF3 varies along the length L3 of the transition segment.

35. The stent of claim 33 , wherein the third flexibility F3 varies along the length L3 of the transition segment.

36. The stent of claim 33 , wherein the third radial force RF3 is constant along the length L3 of the transition segment.

37. The stent of claim 33 , wherein the third flexibility F3 is constant along the length L3 of the transition segment.

38. The stent of claim 33 , wherein the high radial force segment comprises a first plurality of contiguous interconnected struts, the highly flexible segment comprises a second plurality of contiguous interconnected struts, and the transition segment comprises a third plurality of interconnected struts.

39. The stent of claim 38 , wherein the high radial force segment has a proximal end and a distal end, the highly flexible region has a proximal end and a distal end, and the transition segment has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the transition segment and the distal end of the transition segment is contiguous with the proximal end of the highly flexible segment.

40. The stent of claim 39 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

41. The stent of claim 39 , wherein the proximal segment of the high radial force segment has a flare shape.

42. The stent of claim 33 , wherein the high radial force segment, the transition segment and the highly flexible segment comprises a single unitary tube.

43. The stent of claim 33 , wherein the high radial force segment has a diameter D1 in an expanded state, the highly flexible segment has a diameter D2 in an expanded state, the transition segment has a diameter D3, and D1=D2=D3 in an expanded state.

44. A stent, comprising:

a stent tube having stent tube length L0, the stent tube comprising:

a high radial force segment having a first radial force RF1, a flexibility F1 and a length L1; and

a highly flexible segment having a second radial force RF2, a flexibility F2 and a length L2;

a transition segment between the high radial force segment and the highly flexible segment and having a third radial force RF3, a flexibility F3 and a length L3; and

an additional stent segment, unconnected to the stent tube, the additional stent segment having an end region configured to overlap a portion of the highly flexible segment in vivo;

wherein the stent tube length includes length L1 and length L2, where L2>L1;

wherein RF1>RF3>RF2; and

wherein F1<F3<F2.

45. The stent of claim 44 , wherein the third radial force RF3 varies along the length L3 of the transition segment.

46. The stent of claim 44 , wherein the third flexibility F3 varies along the length L3 of the transition segment.

47. The stent of claim 44 , wherein the third radial force RF3 is constant along the length L3 of the transition segment.

48. The stent of claim 44 , wherein the third flexibility F3 is constant along the length L3 of the transition segment.

49. The stent of claim 44 , wherein the high radial force segment comprises a first plurality of contiguous interconnected struts, the highly flexible segment comprises a second plurality of contiguous interconnected struts, and the transition segment comprises a third plurality of interconnected struts.

50. The stent of claim 49 , wherein the high radial force segment has a proximal end and a distal end, the highly flexible region has a proximal end and a distal end, and the transition segment has a proximal end and a distal end, wherein the distal end of the high radial force segment is contiguous with the proximal end of the transition segment and the distal end of the transition segment is contiguous with the proximal end of the highly flexible segment.

51. The stent of claim 50 , further comprising a reinforcement ring at least one of the proximal end of the high radial force segment and the distal end of the highly flexible segment.

52. The stent of claim 50 wherein the proximal segment of the high radial force segment has a flare shape.

53. The stent of claim 44 , wherein the high radial force segment, the transition segment and the highly flexible segment comprises a single unitary tube.

54. The stent of claim 44 , wherein the high radial force segment has a diameter D1 in an expanded state, the highly flexible segment has a diameter D2 in an expanded state, the transition segment has a diameter D3, and D1=D2=D3 in an expanded state.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 25, 2020

From: LONGO, MICHAEL A.; HARRISON, WILLIAM JAMES

To: VESPER MEDICAL, INC.

Reel/Frame 051911/0850 →

Continuity (4)

Continuation 16397085 · Apr 29, 2019

Division 15712704 · Sep 22, 2017

Provisional Application 62555894 · Sep 8, 2017

Related Publication 20200188148A1 · Jun 18, 2020

Cited By (1)

US 12,239,554