Balloon catheters with increased column strength

• US 20070005092A1
• Filed: 06/09/2005
• Published: 01/04/2007
• Est. Priority Date: 06/09/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Blix, John, Wise, Derek, Gunderson, Richard, Godin, Dominick
• Granted Patent: US 9,352,133 B2
• Time in Patent Office: Days
• US Class Current: 606/194
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• CPC Class Codes: A61M 2025/1079 having radio-opaque markers in the region of the balloon
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1006 Balloons formed between concentric tubes
• CPC Class Codes: A61M 25/10185 Valves
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

An intravascular balloon catheter that may include, for example, a first elongate member having a proximal end, an opening at the distal end and a lumen therebetween, a balloon defining a cavity, the balloon having a proximal waist sealingly attached to the first elongate member proximal the distal end, a distal waist, and a tubular portion therebetween, a second elongate member having a proximal end, a distal end and a lumen therebetween, the second elongate member disposed in the first elongate member and sealingly attached to the balloon distal waist, and a stopper attached to the second elongate member and disposed in the balloon cavity distal the distal end of the first elongate member, the stopper having an outer profile that prevents movement of the first elongate member thereover the first elongate member having an inner diameter at the distal end large enough to permit the passage of fluid therethrough over the second elongate member.

Claims

1. An intravascular balloon catheter, comprising:

a first elongate member having a proximal end, an opening at the distal end and a lumen therebetween;

a balloon defining a cavity, the balloon having a proximal waist sealingly attached to the first elongate member proximal the distal end, a distal waist, and a tubular portion therebetween;

a second elongate member having a proximal end, a distal end and a lumen therebetween, the second elongate member disposed in the first elongate member and sealingly attached to the balloon distal waist; and

a stopper attached to the second elongate member distal the distal end of the first elongate member, the stopper having an outer profile that prevents movement of the first elongate member thereover, the first elongate member having an inner diameter at the distal end large enough to permit the passage of fluid therethrough over the second elongate member.

2. The catheter of claim 1, further comprising one or more orifices in the first elongate member proximal the first elongate member distal end and distal the balloon proximal waist.

3. The catheter of claim 1, wherein the stopper comprises two or more lobes, the lobes defining gaps therebetween to allow fluid passage from the distal end of the first elongate member into the balloon cavity.

4. The catheter of claim 1, wherein the stopper is a basket attached to the second elongate member and flaring proximally to define a cavity sized to receive the distal end of the first elongate member.

5. The catheter of claim 4, wherein the basket is movable between a first lower profile configuration and a second configuration where the basket flares proximally to define the cavity, and wherein the basket is biased to be in the second configuration.

6. The catheter of claim 2, wherein the stopper is a cap attached to the second elongate member and flaring proximally to define a cavity sized to receive the distal end of the first elongate member.

7. The catheter of claim 6, wherein the stopper comprises one or more orifices in a side wall thereof.

8. The catheter of claim 1, wherein the stopper is fixed to the first elongate member and has a proximal face sized to abut a distal face of the first elongate member and prevent distal passage of the first elongate member thereover.

9. The catheter of claim 8, further comprising one or more orifices in the first elongate member distal the proximal waist and proximal the distal end thereof.

10. The catheter of claim 1, wherein the second elongate member has a first outer diameter and a second larger outer diameter distal the first outer diameter, the second outer diameter proximal end disposed in the balloon cavity and sized to prevent passage of the first elongate member thereover.

11. The catheter of claim 10, wherein the second elongate member comprises a taper between the first outer diameter and the second outer diameter.

12. The catheter of claim 10, wherein the second elongate member comprises a step-wise transition between the first outer diameter and the second outer diameter.

13. The catheter of claim 1, wherein the proximal waist extends distally of the distal end of the first elongate member and wherein the stopper is fixed to the second elongate member and sized to abut a distal face of the first elongate member.

14. The catheter of claim 13, wherein the stopper comprises a wall having one or more or openings positioned to allow the passage of fluid therethrough.

15. The catheter of claim 1, further comprising a radiopaque marker having a profile, the radiopaque marker being fixed to the second elongate member and disposed in the balloon cavity, wherein the stopper is slidable on the second elongate member and is disposed between a distal face of the first elongate member and the radiopaque marker, the stopper having a proximal face sized to abut the distal face of the first elongate member and prevent distal passage of the first elongate member thereover and a distal face sized to abut the radiopaque marker and sized to prevent distal passage of the stopper over the radiopaque marker.

22. The catheter of claim 1, wherein the stopper is attached to the first elongate member and the second elongate member, the stopper permitting a first relative position between the first and second elongate members where the stopper has a first length and second relative position between the first and second elongate members where the stopper has a second length shorter than the first length, the stopper permitting fluid flow therethrough.

23. The catheter of claim 22, wherein the stopper comprises a plurality of telescoping wire rings.

24. The catheter of claim 22, wherein the stopper comprises a plurality of sliding segments connected to each other seriatim.

47. The catheter of claim 1, wherein the first elongate member extends distally of the proximal waist and wherein the stopper is fixed to the second elongate member and sized to abut a distal face of the first elongate member.

16. An intravascular balloon catheter, comprising:

a first elongate member having a proximal end, an opening at the distal end and a lumen therebetween;

a balloon defining a cavity, the balloon having a proximal waist sealingly attached to the first elongate member proximal the distal end, a distal waist, and a tubular portion therebetween;

a second elongate member having a proximal end, a distal end and a lumen therebetween, the second elongate member disposed in the first elongate member and sealingly attached to the balloon distal waist;

the first elongate member having an inner diameter at the distal end large enough to permit the passage of fluid therethrough over the second elongate member; and

a wire attached to the first elongate member proximate the proximal end thereof and attached to the second elongate member proximate the proximal waist of the balloon at a distal attachment point of the wire.

17. The catheter of claim 16, wherein the wire comprises a coil disposed around the second elongate member proximal the distal attachment point.

18. The catheter of claim 17, further comprising one or more attachment points between the wire and the second elongate member proximal the distal attachment point.

19. The catheter of claim 16, further comprising a radiopaque marker attached to the second elongate member and disposed in the balloon cavity, wherein the wire is attached to the second elongate member at the radiopaque marker.

20. An intravascular balloon catheter, comprising:

a first elongate member having a proximal end, an opening at the distal end and a lumen therebetween;

a balloon defining a cavity, the balloon having a proximal waist sealingly attached to the first elongate member proximal the distal end, a distal waist, and a tubular portion therebetween;

a second elongate member having a proximal end, a distal end and a lumen therebetween, the second elongate member disposed in the first elongate member and sealingly attached to the balloon distal waist;

the first elongate member having an inner diameter at the distal end large enough to permit the passage of fluid therethrough over the second elongate member; and

a third elongate member attached proximally to the proximal balloon waist or the distal end of the first elongate member and attached distally to the distal balloon waist.

21. The catheter of claim 20, wherein the third elongate member is attached distally to the second elongate member proximate the distal balloon waist.

48. The catheter of claim 20, wherein the third elongate member is a coil slidably disposed about the second elongate member in the balloon cavity.

25. A balloon catheter, comprising a first elongate member having a first end, a second end and a lumen therebetween;

a second elongate member having a first end, a second end, a lumen therebetween and an outer surface, the second elongate member being disposed in the lumen of the first elongate member;

a balloon having a proximal waist sealingly attached to the first elongate member, a distal waist sealingly attached to the second elongate member, an inflation cavity therebetween, and an inner surface;

wherein the balloon has a deflated condition where at least a portion of the balloon inner surface is in contact with at least a portion of the second elongate member outer surface,

the balloon inner surface having a first texture thereon, the second elongate member outer surface having a second texture thereon, the first and second textures interacting in the deflated condition to prevent relative movement of the balloon and the second elongate member.

26. The catheter of claim 25 wherein the first texture comprises a plurality of bumps.

27. The catheter of claim 25 wherein the second texture comprises a plurality of transverse ribs.

28. The catheter of claim 25 wherein the second texture comprises a plurality of zigzag ribs.

29. A balloon catheter, comprising

a first elongate member having a first end, a second end and a lumen therebetween;

a second elongate member having a first end, a second end, a lumen therebetween and an outer surface, the second elongate member being disposed in the lumen of the first elongate member;

a balloon having a proximal waist sealingly attached to the first elongate member, a distal waist sealingly attached to the second elongate member, an inflation cavity therebetween, and an inner surface;

wherein the balloon has a deflated condition where at least a portion of the balloon inner surface is in contact with at least a portion of the second elongate member outer surface,

the balloon inner surface and the second elongate member outer surface having a tacky adhesive thereon that prevents relative movement of the balloon and the second elongate member in the deflated condition

30. A balloon catheter, comprising

a first elongate member having a first end, a second end and a lumen therebetween;

a second elongate member having a first end, a second end, a lumen therebetween and an outer surface, the second elongate member being disposed in the lumen of the first elongate member; and

a balloon having a proximal waist sealingly attached to the first elongate member, a distal waist sealingly attached to the second elongate member, an inflation cavity therebetween, and an inner surface,

wherein an interference fit proximate the distal waist of the balloon prevents relative movement between the first and second elongate members.

31. The catheter of claim 30, wherein the outer surface of the second elongate member has an irregular profile that provides an inteference fit with the inner surface of the first elongate member, the first elongate member outer surface and the second elongate member inner surface defining one or more fluid passageways that fluidly connect the balloon cavity to the proximal end of the catheter.

32. The catheter of claim 31, wherein the second elongate member has a polygonal profile.

33. The catheter of claim 31, wherein the first elongate member has a reduced inner diameter proximate the balloon proximal waist.

34. The catheter of claim 30, further comprising an insert between the first and second elongate members proximate the balloon proximal waist, the insert providing the interference fit and providing fluid passage lumens to fluidly connect the balloon cavity and the catheter proximal end.

35. The catheter of claim 34, wherein the insert has a circular inner profile and a non-circular outer profile.

36. The catheter of claim 35, wherein the insert has a polygonal outer profile.

37. The catheter of claim 35, wherein the insert has an elliptical outer profile.

38. The catheter of claim 34, wherein the insert has a circular outer profile, a proximal face, a distal face and one or more lumens therebetween.

39. A balloon catheter, comprising:

a first elongate member having a first end, a second end, a lumen therebetween defined by a wall, and an inner surface;

a second elongate member having a first end, a second end, a lumen therebetween and an outer surface, the second elongate member being disposed in the lumen of the first elongate member;

a balloon having a proximal waist sealingly attached to the first elongate member, a distal waist sealingly attached to the second elongate member, an inflation cavity therebetween, and an inner surface;

at least one protrusion extending inward from the inner surface of the first elongate member and at least one protrusion separate from the protrusion from the first elongate member extending outward from the outer surface of the second elongate member, the protrusions cooperatively engaged to prevent relative axial movement between the first and second elongate members.

40. The catheter of claim 39 wherein the protrusion from the first elongate member defines a ring-shaped groove and wherein the at least one protrusion from the second elongate member comprises one or more tabs which fit in the groove, the protrusions providing one or more gaps therebetween for fluid flow.

41. The catheter of claim 40, wherein the protrusion from the first elongate member tapers proximally and distally.

42. The catheter of claim 39, wherein the protrusion from the second elongate member is a ring and wherein the at least one protrusions from the first elongate member comprise tabs between which the ring is confined.

43. The catheter of claim 42, wherein each pair of tabs is axially aligned.

44. The catheter of claim 39, wherein the at least one protrusion in the first elongate member is formed by indenting the wall thereof.

45. The catheter of claim 39, wherein the at least one protrusion in the second elongate member is a proximal ring and a distal ring.

46. The catheter of claim 45, wherein the proximal ring tapers proximally and the distal ring tapers distally.