Intravascular flow modifier and reinforcement device

• US 6,165,194 A
• Filed: 07/24/1998
• Issued: 12/26/2000
• Est. Priority Date: 07/24/1998
• Status: Expired due to Term

• Current Assignee: Micrus Corporation (Johnson & Johnson)
• Original Assignee: Micrus Corporation (Johnson & Johnson)
• Inventors: Denardo, Andrew J.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Bui, Vy Q.
• Application Number:
  US09/122,243
• Time in Patent Office: 886 Days
• Field of Search: 606/191, 606/192, 606/194, 606/195, 606/198, 623/1, 623/11, 623/12
• US Class Current: 606/191
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/885 comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61
• CPC Class Codes: Y10S 623/901 Method of manufacturing prosthetic device

Abstract

An intravascular flow modifier and vascular reinforcement for treatment of aneurysms is formed of a single loop of wire formed into a series of transverse loops and longitudinal connecting sections to configure an essentially cylindrical reinforcement device that still allows, if desired, access to the neck of an aneurysm for insertion of embolic coils and the like.

Claims

1. An intravascular flow modifier and vascular reinforcement device to be used in the intravascular treatment of blood vessels, comprising:

an elongate section of resilient material having a pre-deployed essentially flat configuration and a deployed configuration of a generally cylindrical device in which the two free ends are attached to deployment means at the distal end of a pusher for deploying said device in the vasculature of a patient, are parallel to one another and extend distally from a proximal end of the device, thereafter transitioning at a first predetermined point to a first essentially circumferential loop for a distance less than half of the circumference of the device, thereafter transitioning to a longitudinal section for a predetermined length to a second predetermined point, thereafter transitioning to a second essentially circumferential loop and proceeding similarly to the distal end of the device.

2. The device of claim 1 wherein said elongate section of resilient material is made of a superelastic material.

3. The device of claim 1 wherein said device is made of a shape memory material.

4. The device of claim 2, wherein the superelastic material is a nickel-titanium alloy.

5. The device of claim 3, wherein said shape memory material is a nickel titanium alloy.

6. The device of claim 3, wherein said shape memory material is a shape memory polymer.

7. The device of claim 1 wherein the longitudinal sections of the elongate section of resilient material from which the device is formed are parallel to one another and to a longitudinal axis of the device and are spaced apart by a predetermined distance.

8. The device of claim 1, wherein said first and second essentially circumferential loops are spaced apart distally along the device by a predetermined distance sufficient to allow passage of an embolic coil between said first and second essentially circumferential loops.

9. The device of claim 1, wherein said longitudinal sections are angled to one another to thereby provide an essentially trapezoidal opening in said device.

10. The device of claim 1 wherein the lengths of said longitudinal sections are varied to vary the number of loops contained within a given length of the device.

11. The device of claim 1 wherein the diameter of said loops is varied to allow said device to modify the blood flow characteristics in the vessel in which the device is placed.

12. The device of claim 1, wherein said loops are of different radii from one another.

13. The device of claim 1, wherein said device is formed of a length of material having a non-circular cross section.

14. The device of claim 1, wherein said circumferential loops are formed into an arcuate curve, the radius of said curve varying over the length of the loop.

15. The device of claim 1, wherein the transitions of the circumferential loops to the longitudinal sections have a predetermined radius.

16. The device of claim 1, wherein the distal end of the device is a loop comprising a continuous loop extending from the most distal longitudinal sections.

17. The device of claim 2, wherein said elongate section of resilient material is a stranded cable.

19. The device of claim 17 wherein said long slender piece of resilient material is made of a superelastic material.

20. The device of claim 17 wherein said device is made of a shape memory material.

21. The device of claim 19, wherein the superelastic material is a nickel-titanium alloy.

22. The device of claim 20, wherein said shape memory material is a nickel titanium alloy.

23. The device of claim 20, wherein said shape memory material is a shape memory polymer.

18. An intravascular flow modifier and vascular reinforcement device to be used in the treatment of vascular malformations, comprising;

a plurality of semi-circular loops formed from a long slender piece of resilient material, said resilient material having an essentially flat pre-deployed configuration having two free ends attached to deployment means at the distal end of a pusher for deploying said device in the vasculature of a patient and a deployed substantially cylindrical configuration of a series of essentially longitudinal sections between said loops, said longitudinal sections connecting said semi-circular loops, said longitudinal sections including radii at the transitions between said longitudinal sections and said semi-circular loops, said longitudinal sections and said semi-circular loops proceeding distally from a proximal point to the distal end of said device, whereby said semi-circular loops and said longitudinal elements combine in said deployed configuration to form an essentially cylindrical reinforcement for use in a damaged portion of the vasculature.

24. The device of claim 18, wherein said long slender piece of resilient material is a stranded cable.

25. The device of claim 24, wherein said stranded cable comprises at least one strand of superelastic material.

26. The device of claim 18 wherein the longitudinal sections of the long slender piece of resilient material from which the device is formed are parallel to one another and to a longitudinal axis of the device and are spaced apart by a predetermined distance.

27. The device of claim 18, wherein said semi-circular loops are spaced apart distally along the device by a predetermined distance sufficient to allow passage of an embolic coil between said semi-circular loops.

28. The device of claim 18, wherein said longitudinal sections are angled to one another to thereby provide an essentially trapezoidal opening in said device.

29. The device of claim 18 wherein the lengths of said longitudinal sections are varied to vary the number of loops contained within a given length of the device.

30. The device of claim 18 wherein the diameter of said loops is varied to allow said device to modify the blood flow characteristics in the vessel in which the device is placed.

31. The device of claim 18, wherein said loops are of different radii from one another.

32. The device of claim 18, wherein said device is formed of a length of material having a non-circular cross section.

33. The device of claim 18, wherein said semi-circular loops are formed into an arcuate curve, the radius of said curve varying over the length of the loops.

34. The device of claim 18, wherein the transitions of the semi-circular loops to the longitudinal sections have a predetermined radius.

35. The device of claim 18, wherein the distal end of the device is a loop comprising a continuous loop extending from the most distal longitudinal sections.

36. An intravascular flow modifier and vascular reinforcement device to be used in the treatment of aneurysms, comprising:

a plurality of pairs of longitudinal elements connecting semi-circular loops, the loops and longitudinal sections being formed of a single wire, progressing from free ends of a pair of longitudinal elements at a proximal end of the device and extending distally to define an essentially cylindrical reinforcement;

said longitudinal elements spaced apart and said cylindrical elements spaced apart to provide openings through which a vasoocclusive device can be introduced from an area inside said device to an area outside said device and within an aneurysm to be treated, said device being capable of being formed into an essentially linear configuration for insertion into a guiding catheter, an essentially flat pre-deployed configuration, and a substantially cylindrical deployed configuration; and

a release means at the proximal end of said device attaching said device to a pusher within the catheter and which may be used to push the device out of the catheter when the catheter has reached a predetermined position within the vasculature, the two free ends being attached to said release means at the distal end of a pusher for deploying said device in the vasculature of a patient.

37. The device of claim 36 wherein said wire is made of a superelastic material.

38. The device of claim 36 wherein said device is made of a shape memory material.

39. The device of claim 37, wherein the superelastic material is a nickel-titanium alloy.

40. The device of claim 38, wherein said shape memory material is a nickel titanium alloy.

41. The device of claim 38, wherein said shape memory material is a shape memory polymer.

42. The device of claim 36 wherein the longitudinal sections of the wire from which the device is formed are parallel to one another and to a longitudinal axis of the device and are spaced apart by a predetermined distance.

43. The device of claim 36, wherein said semi-circular loops are spaced apart distally along the device by a predetermined distance sufficient to allow passage of an embolic coil between said loops.

44. The device of claim 36, wherein said longitudinal sections are angled to one another to thereby provide an essentially trapezoidal opening in said device.

45. The device of claim 36 wherein the lengths of said longitudinal sections are varied to vary the number of loops contained within a given length of the device.

46. The device of claim 36 wherein the diameter of said loops is varied to allow said device to modify the blood flow characteristics in the vessel in which the device is placed.

47. The device of claim 36, wherein said loops are of different radii from one another.

48. The device of claim 36, wherein said device is formed of a length of material having a non-circular cross section.

49. The device of claim 36, wherein said device is formed from a multistranded cable.

50. The device of claim 49, wherein said multistranded cable includes at least one strand made of a nickel-titanium alloy.

51. The device of claim 36, wherein said semi-circular loops are formed into an arcuate curve, the radius of said curve varying over the length of the loop.

52. The device of claim 36, wherein the transitions of the semi-circular loops to the longitudinal sections have a predetermined radius.

53. The device of claim 36, wherein the distal end of the device is a loop comprising a continuous loop extending from the most distal longitudinal sections.