Catheter assembly

• US 8,808,234 B2
• Filed: 03/10/2011
• Issued: 08/19/2014
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Cleveland Clinic Foundation
• Original Assignee: Cleveland Clinic Foundation
• Inventors: Vogelbaum, Michael A., Chen, Ji-Feng, Gao, Shengqiang
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): CHANDER, DIVA KAKAR
• Application Number:
  US13/044,963
• Publication Number:
  US 20110224607A1
• Time in Patent Office: 1,258 Days
• Field of Search: 604/95.04, 604/96.01, 604/164.01
• US Class Current: 604/96.01
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 2025/004 characterized by lumina being arranged circumferentially
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0057 Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings
• CPC Class Codes: A61M 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2025/1081 having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• 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

Abstract

A catheter assembly comprises a first catheter including a wall with an inner surface at least partially defining a lumen. A second catheter is connected to the wall of the first catheter and is disposed outward of the inner surface of the wall. The second catheter is at least partially covered by a sheath portion of the first catheter.

Claims

1. A catheter assembly comprising:

a first catheter including a wall with an inner surface at least partially defining a lumen, at least a portion of the wall of the first catheter being made of a resilient material and being resiliently extensible; and

a second catheter connected to the wall of the first catheter and disposed outward of the inner surface of the wall, the second catheter being at least partially covered by a sheath portion of the first catheter, resilient extension of said at least a portion of the wall of the first catheter causing at least a portion of the second catheter to assume one of a position covered by the sheath portion of the first catheter and a position projecting out the sheath portion of the first catheter.

2. A catheter assembly according to claim 1 wherein the sheath portion of the first catheter includes the wall of the first catheter, the wall having an outer surface, the second catheter being at least partially disposed between the inner and outer surfaces of the wall.

3. A catheter assembly according to claim 2 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when disposed between the inner and outer surfaces of the wall of the first catheter.

4. A catheter assembly according to claim 3 wherein said at least a portion of the wall of the first catheter is a lengthwise portion of the wall of the first catheter, the lengthwise portion of the wall being longitudinally resiliently extensible, at least a portion of the second catheter being disposed between the inner and outer surfaces of the wall of the first catheter when the lengthwise portion of the wall is longitudinally extended, said at least a portion of the second catheter projecting out of the wall of the first catheter and assuming the predetermined shape when the lengthwise portion of the wall resiliently returns from a longitudinally extended condition.

5. A catheter assembly according to claim 4 wherein the lengthwise portion of the wall is a first lengthwise portion of the wall, the inner and outer surfaces of the wall of the first catheter being spaced apart (a) a first distance in the first lengthwise portion of the wall of the first catheter and (b) a second distance in a second lengthwise portion of the wall of the first catheter, the first distance being larger than the second distance.

6. A catheter assembly according to claim 1 wherein the wall of the first catheter has an outer surface, the sheath portion of the first catheter and at least a portion of the second catheter being disposed outward of the outer surface of the wall of the first catheter.

7. A catheter assembly according to claim 6 wherein the second catheter is at least partially fixed to the outer surface of the wall of the first catheter.

8. A catheter assembly according to claim 6 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when covered by the sheath portion of the first catheter.

9. A catheter assembly according to claim 8 wherein the second catheter projects out of the sheath portion of the first catheter when said at least a portion of the wall is extended.

10. A catheter assembly according to claim 6 wherein the sheath portion of the first catheter is at least partially fixed to the wall of the first catheter.

11. A catheter assembly according to claim 6 wherein the sheath portion of the first catheter is at least partially releasably attached to the wall of the first catheter.

12. A catheter assembly according to claim 11 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when covered by the sheath portion of the first catheter.

13. A catheter assembly according to claim 1 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when covered by the sheath portion of the first catheter.

14. A catheter assembly according to claim 1 wherein the second catheter projects out of the sheath portion of the first catheter when said at least a portion of the wall is extended.

15. A catheter assembly according to claim 1 wherein resilient extension of said at least a portion of the wall causes a portion of the second catheter to be pulled in a direction away from the sheath portion of the first catheter and thereby uncovered.

16. A catheter assembly comprising:

a first catheter including a wall with an inner surface at least partially defining a first lumen, at least a portion of the wall of the first catheter being made of a resilient material and being longitudinally resiliently extensible; and

a second catheter including a second lumen, the second catheter being disposed outward of the inner surface of the wall of the first catheter, the second catheter being at least partially fixed to the wall of the first catheter, the first catheter being disposed outside of the second lumen, resilient extension of said at least a portion of the wall of the first catheter causing relative movement between said at least a portion of the wall and an adjacent portion of the second catheter.

17. A catheter assembly according to claim 16 wherein the wall of the first catheter has an outer surface, the second catheter being at least partially disposed between the inner and outer surfaces of the wall.

18. A catheter assembly according to claim 17 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when disposed between the inner and outer surfaces of the wall of the first catheter.

19. A catheter assembly according to claim 18 wherein said at least a portion of the wall of the first catheter is a lengthwise portion of the wall of the first catheter, at least a portion of the second catheter being disposed between the inner and outer surfaces of the wall of the first catheter when the lengthwise portion of the wall is longitudinally extended, said at least a portion of the second catheter projecting out of the wall of the first catheter and assuming the predetermined shape when the lengthwise portion of the wall resiliently returns from a longitudinally extended condition.

20. A catheter assembly according to claim 19 wherein the lengthwise portion of the wall is a first lengthwise portion of the wall, the inner and outer surfaces of the wall of the first catheter being spaced apart (a) a first distance in the first lengthwise portion of the wall of the first catheter and (b) a second distance in a second lengthwise portion of the wall of the first catheter, the first distance being larger than the second distance.

21. A catheter assembly according to claim 16 wherein the wall of the first catheter has an outer surface, the second catheter being disposed outward of the outer surface of the wall of the first catheter, the second catheter being at least partially fixed to the outer surface of the first catheter.

22. A catheter assembly according to claim 21 wherein the second catheter is at least partially covered by a sheath portion of the first catheter.

23. A catheter assembly according to claim 22 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when covered by the sheath portion of the first catheter.

24. A catheter assembly according to claim 22 wherein the second catheter projects out of the sheath portion of the first catheter when said at least a portion of the wall is extended.

25. A catheter assembly according to claim 22 wherein resilient extension of said at least a portion of the wall causes a portion of the second catheter to be pulled in a direction away from the sheath portion of the first catheter and thereby uncovered.

26. A catheter assembly comprising:

a first catheter including a wall with an inner surface at least partially defining a lumen extending lengthwise of the first catheter, at least a portion of the wall of the first catheter being made of a resilient material and being resiliently extensible; and

a second catheter at least partially disposed in the wall of the first catheter outward of the inner surface of the wall and extending lengthwise of the first catheter, resilient extension of said at least a portion of the wall of the first catheter causing relative movement between said at least a portion of the wall and an adjacent portion of the second catheter.

27. A catheter assembly according to claim 26 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when disposed in the wall of the first catheter.

28. A catheter assembly according to claim 27 wherein at least a portion of the second catheter projects out of the wall of the first catheter and assumes the predetermined shape.

29. A catheter assembly according to claim 28 wherein said at least a portion of the second catheter is a distal portion of the second catheter and projects out of a distal portion of the wall of the first catheter.

30. A catheter assembly according to claim 29 wherein the second catheter also has an opposite proximal portion projecting out of a proximal portion of the wall of the first catheter, a fluid inlet port being in communication with the proximal portion of the second catheter.

31. A catheter assembly according to claim 29 wherein said at least a portion of the wall of the first catheter is a lengthwise portion of the wall of the first catheter, the distal portion of the second catheter being disposed between the inner and outer surfaces of the wall of the first catheter when the lengthwise portion of the wall is longitudinally resiliently extended, the distal portion of the second catheter projecting out of the wall of the first catheter and assuming the predetermined shape when the lengthwise portion of the wall resiliently returns from a longitudinally extended condition.

32. A catheter assembly according to claim 31 wherein the lengthwise portion of the wall is a first lengthwise portion of the wall, the inner and outer surfaces of the wall of the first catheter being spaced apart (a) a first distance in the first lengthwise portion of the wall of the first catheter and (b) a second distance in a second lengthwise portion of the wall of the first catheter, the first distance being larger than the second distance.

33. A catheter assembly according to claim 28 wherein said at least a portion of the second catheter is a distal portion of the second catheter and projects out of a distal portion of the wall of the first catheter, the second catheter also having an opposite end portion in fluid communication with the lumen of the first catheter.

34. A catheter assembly according to claim 33 wherein said at least a portion of the wall of the first catheter is a lengthwise portion of the wall of the first catheter, the lengthwise portion of the wall being longitudinally resiliently extensible, the distal portion of the second catheter being disposed between the inner and outer surfaces of the wall of the first catheter when the lengthwise portion of the wall is longitudinally resiliently extended, the distal portion of the second catheter projecting out of the wall of the first catheter and assuming the predetermined shape when the lengthwise portion of the wall resiliently returns from a longitudinally extended condition.

35. A catheter assembly according to claim 26 wherein said at least a portion of the wall of the first catheter is a lengthwise portion of the wall of the first catheter, the lengthwise portion of the wall being longitudinally resiliently extensible, the lengthwise portion of the wall of the first catheter having a diameter that is reduced when the lengthwise portion of the wall is longitudinally resiliently extended, the diameter of the lengthwise portion of the wall increasing from a reduced condition when the lengthwise portion of the wall resiliently returns from a longitudinally extended condition.

36. A catheter assembly according to claim 26 wherein the second catheter is at least partially covered by a sheath portion of the first catheter, resilient extension of said at least a portion of the wall causing a portion of the second catheter to be pulled in a direction away from the sheath portion of the first catheter and thereby uncovered.

37. A catheter assembly comprising a catheter having a wall at least partially defining a lumen, the wall of the catheter having an inner surface and an outer surface, a first lengthwise portion of the wall being made of a resilient material and being longitudinally resiliently extensible, the first lengthwise portion of the wall having a diameter that is reduced when the first lengthwise portion of the wall is longitudinally resiliently extended, the diameter of the first lengthwise portion of the wall increasing from a reduced condition when the first lengthwise portion of the wall resiliently returns from a longitudinally extended condition, the inner and outer surfaces of the wall of the first catheter being spaced apart (a) a first distance along a length of the first lengthwise portion of the wall of the catheter and (b) a second distance along a length of a second lengthwise portion of the wall of the catheter, the first distance being larger than the second distance.

38. A catheter assembly comprising:

a first catheter including a wall with an inner surface at least partially defining a lumen; and

a second catheter disposed outward of the inner surface of the wall,

at least a portion of the wall of the first catheter being made of a resilient material and being resiliently extensible, the second catheter being connected to said at least a portion of the wall of the first catheter, resilient extension of said at least a portion of the wall causing a portion of the second catheter to be pulled from a first position to a second position.

39. A catheter assembly according to claim 38 further comprising a piece of material that is less extensible than said at least a portion of the wall of the first catheter, the piece of material being connected to the second catheter and to said at least a portion of the wall of the first catheter, resilient extension of said at least a portion of the wall causing the piece of material to pull the portion of the second catheter from the first position to the second position.

40. A catheter assembly according to claim 38 wherein said at least a portion of the wall of the first catheter constitutes a balloon portion of the first catheter.

41. A catheter assembly comprising:

a first catheter including a first lumen;

a second catheter; and

a piece of material connected to the first catheter,

movement of the second catheter causing the piece of material to move and pull at least a portion of the first catheter from a first position to a second position.

42. A catheter assembly according to claim 41 wherein the second catheter includes a wall with an inner surface at least partially defining a second lumen, at least a portion of the wall being made of a resilient material and being resiliently extensible, the piece of material being disposed outside of the first lumen and outward of the inner surface of the wall of the second catheter, the piece of material being elongated and connecting the first catheter to said at least a portion of the wall of the second catheter, resilient extension of said at least a portion of the wall causing the piece of material to move and pull the portion of the first catheter from the first position to the second position.

43. A catheter assembly comprising:

a first catheter including a wall with an inner surface at least partially defining a lumen, at least a portion of the wall of the first catheter being made of a resilient material and being extensible; and

a second catheter connected to the wall of the first catheter and disposed outward of the inner surface of the wall, the second catheter being at least partially covered by a sheath portion of the first catheter,

the wall of the first catheter having an outer surface, the sheath portion of the first catheter and at least a portion of the second catheter being disposed outward of the outer surface of the wall of the first catheter, the sheath portion of the first catheter is at least partially releasably attached to the wall of the first catheter.

44. A catheter assembly according to claim 43 wherein the second catheter has a predetermined shape, the second catheter being deflected from the predetermined shape when covered by the sheath portion of the first catheter.