CATHETER WITH GUIDEWIRE LUMEN WITH TUBULAR PORTION AND SLEEVE

• US 20080177227A1
• Filed: 01/08/2008
• Published: 07/24/2008
• Est. Priority Date: 01/22/2007
• Status: Active Grant

• Current Assignee: Taylor Medical, Inc. (McKesson Corp.)
• Original Assignee: Taylor Medical, Inc. (McKesson Corp.)
• Inventors: Wilkins, Douglas P.
• Granted Patent: US 8,012,123 B2
• Time in Patent Office: Days
• US Class Current: 604/103
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/1084 having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
• CPC Class Codes: A61M 2025/1093 having particular tip characteristics
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• 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 guidewire lumen for a catheter includes a tubular portion and a sleeve bonded over less than an entire length of the tubular portion. The tubular portion is formed of a first material and the sleeve is formed of a second material. The second material may bond better to certain materials than the first material.

Claims

1. A guidewire lumen for a catheter, comprising a tubular portion and a sleeve disposed over less than an entire length of the tubular portion, the tubular portion being formed of a first polymer and the sleeve being formed of a second polymer, the second polymer comprising one or more of a polyamide, a nylon, a polyether block amide, and polyurethane.

2. The guidewire lumen as set forth in claim 1, wherein the first polymer has lower friction passing over a guidewire than the second polymer.

3. The guidewire lumen as set forth in claim 1, wherein the tubular portion is extruded as a single layer tube.

4. The guidewire lumen as set forth in claim 1, wherein the first polymer is HDPE.

5. The guidewire lumen as set forth in claim 1, comprising a tip disposed at a distal end of the tubular portion, a distal end of the tip having a smaller diameter than a proximal end of the tip.

6. The guidewire lumen as set forth in claim 5, wherein the tip is formed of the first polymer.

7. The guidewire lumen as set forth in claim 6, wherein the tip is integral with the tubular portion.

8. The guidewire lumen as set forth in claim 5, wherein the sleeve extends over at least a portion of the tip.

9. The guidewire lumen as set forth in claim 1, comprising a metallic marker band disposed around a portion of the tubular portion, the sleeve being disposed over the marker band and extending from proximate a distal end of the tubular portion to a point proximal of and proximate the marker band.

10. The guidewire lumen as set forth in claim 1, comprising first and second metallic marker bands disposed around first and second portions, respectively, of the tubular portion, the first marker band being disposed closer to a distal end of the tubular portion than the second marker band, the sleeve being disposed over the first and second marker bands and extending from proximate a distal end of the tubular portion to a point proximal of and proximate the second marker band.

11. The guidewire lumen as set forth in claim 1, wherein the sleeve is disposed around at least a proximal end of the tubular portion.

12. The guidewire lumen as set forth in claim 11, wherein the sleeve disposed around the proximal end of the tubular portion is no more than 10 mm in length.

13. The guidewire lumen as set forth in claim 1, wherein the sleeve is disposed around at least a distal end of the tubular portion.

14. The guidewire lumen as set forth in claim 13, wherein the sleeve disposed around the distal end of the tubular portion is no more than 10 mm in length.

15. The guidewire lumen as set forth in claim 1, wherein the sleeve is disposed around at least a distal end and a proximal end of the tubular portion.

16. The guidewire lumen as set forth in claim 15, wherein no sleeve is provided around an intermediate portion of the tubular portion between the sleeve at the proximal end of the tubular portion and the sleeve at the distal end of the tubular portion.

17. The guidewire lumen as set forth in claim 16, wherein the sleeve disposed around the distal end and the sleeve disposed around the proximal end of the tubular portion are each no more than 10 mm in length.

18. The guidewire lumen as set forth in claim 1, wherein the second polymer is adapted to be bonded to a nylon balloon without adhesive.

19. A guidewire lumen for a catheter, comprising a tubular portion formed of a first material and a sleeve formed of a second material disposed around part of the tubular portion, and a metallic marker band disposed around a portion of the tubular portion, the sleeve being disposed over the marker band and extending from proximate a distal end of the tubular portion to a point proximal of and proximate the marker band.

20. The guidewire lumen for a catheter as set forth in claim 19, wherein a bond strength per unit area between the marker band and the sleeve is greater than a bond strength between the tubular portion and the sleeve.

21. The guidewire lumen for a catheter as set forth in claim 20, wherein a bond strength per unit area between the marker band and the tubular portion is greater than a bond strength between the tubular portion and the sleeve.

22. The guidewire lumen for a catheter as set forth in claim 19, wherein a bond strength per unit area between the marker band and the tubular portion is greater than a bond strength between the tubular portion and the sleeve.

23. The guidewire lumen for a catheter as set forth in claim 19, comprising a first and a second marker band, the first marker band being disposed closer to a distal end of the tubular portion than the second marker band.

24. The guidewire lumen for a catheter as set forth in claim 23, wherein the sleeve is disposed over the first marker band.

25. The guidewire lumen for a catheter as set forth in claim 24, wherein the sleeve is disposed over the second marker band.

26. The guidewire lumen for a catheter as set forth in claim 19, wherein the tubular portion has a smaller diameter proximate the marker band than at a point proximal of the marker band.

27. The guidewire lumen for a catheter as set forth in claim 19, wherein a diameter of the guidewire lumen is substantially uniform over an entire length of the sleeve.

28. A method of making a catheter, comprising:

providing a sleeve over less than an entire length of a tubular portion of a guidewire lumen, the tubular portion being formed of a first material and the sleeve being formed of a second material;

providing a marker band over the tubular portion and beneath the sleeve; and

bonding the sleeve to a catheter component.

29. The method as set forth in claim 28, wherein the catheter component comprises a balloon that is disposed around the sleeve.

30. The method as set forth in claim 29, wherein the catheter component comprises a catheter shaft that is disposed around the sleeve.

31. The method as set forth in claim 28, wherein the catheter component comprises a catheter shaft that is disposed around the sleeve.

32. The method as set forth in claim 31, wherein the guidewire lumen extends through an opening in a wall of the catheter shaft, the sleeve being bonded to the catheter shaft where the guidewire lumen extends through the opening in the wall of the catheter shaft.

33. The catheter as set forth in claim 32, wherein the balloon is bonded to the distal sleeve without adhesive.

34. The catheter as set forth in claim 32, wherein the catheter shaft is bonded to the proximal sleeve without adhesive.

35. The catheter as set forth in claim 32, wherein a bond strength per unit area between the marker band and the sleeve is greater than a bond strength between the tubular portion and the sleeve.

36. The catheter as set forth in claim 32, wherein a bond strength per unit area between the marker band and the tubular portion is greater than a bond strength between the tubular portion and the sleeve.

37. The catheter as set forth in claim 32, comprising a first and a second marker band, the first marker band being disposed closer to a distal end of the tubular portion than the second marker band.

38. The guidewire lumen for a catheter as set forth in claim 37, wherein the sleeve is disposed over the first marker band.

39. The guidewire lumen for a catheter as set forth in claim 38, wherein the sleeve is disposed over the second marker band.

40. The catheter as set forth in claim 32, wherein the guidewire lumen passes through an opening in a wall of the catheter shaft and the sleeve is bonded to the catheter shaft proximate the opening.

32-1. A catheter comprising:

a guidewire lumen comprising a tubular portion and proximal and distal sleeves disposed over less than an entire length of the tubular portion, the tubular portion being formed of a first material and the sleeves being formed of a second material, and a metallic marker band disposed between the distal sleeve and the tubular portion;

a balloon bonded to the distal sleeve; and

a catheter shaft bonded to the proximal sleeve.