Catheter with skived tubular member

• US 9,687,634 B2
• Filed: 08/16/2013
• Issued: 06/27/2017
• Est. Priority Date: 02/20/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Grovender, Adam D., Knowles, Thomas, McGowan, Roger W., Rundquist, Charles, Xu, Chuanjing, Rowe, Todd, Gundale, Benjamin P.
• Primary Examiner(s): Bosques, Edelmira
• Application Number:
  US13/969,194
• Publication Number:
  US 20130331782A1
• Time in Patent Office: 1,411 Days
• Field of Search: 604523-525, 60410304, 604 9601
• CPC Class Codes: A61L 29/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/0015 Making lateral openings in a catheter tube, e.g. holes, slits, ports, piercings of guidewire ports; Methods for processing the holes, e.g. smoothing the edges
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• 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
• CPC Class Codes: A61M 25/1036 Making parts for balloon catheter systems, e.g. shafts or distal ends A61M25/1029 takes precedence
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

An elongate shaft of a medical catheter including a thermoset polymeric tubular member including a skived distal portion. The skived distal portion includes a distally extending trough having a convex surface and a concave surface. A thermoplastic tubular sleeve may be positioned over at least a portion of the skived distal portion of the thermoset polymeric tubular member. In some instances, the thermoplastic tubular sleeve includes a crescent-shaped tubular portion defining a crescent-shaped lumen. The trough of the skived distal portion may extend through the crescent-shaped lumen. The thermoplastic tubular sleeve is thermally bonded to the inner and outer tubular members of a distal section of the elongate shaft at a guidewire port joint.

Claims

1. A medical catheter comprising:

a hub assembly; and

an elongate shaft extending distally from the hub assembly, the elongate shaft including a proximal section, a midshaft section, and a distal section extending along a longitudinal axis of the shaft;

the midshaft section including a cylindrical tubular member having a lumen and including a skived distal portion having a compound cut surface including a first planar cut surface portion through a wall of the cylindrical tubular member and a second planar cut surface portion through the wall of the cylindrical tubular member, wherein the first planar cut surface portion is non-parallel to the second planar cut surface portion and exposes the lumen of the cylindrical tubular member, wherein the first planar cut surface extends along a plane that transects the cylindrical tubular member at an acute angle to the longitudinal axis, wherein the second planar cut surface portion extends substantially parallel to the longitudinal axis and extends to a distal end of the midshaft section;

the distal section including an outer tubular member and an inner tubular member disposed within the outer tubular member; and

wherein the skived distal portion of the tubular member overlaps a proximal portion of the outer tubular member of the distal section.

2. The medical catheter of claim 1, wherein the skived distal portion of the tubular member at the second planar cut surface leaves substantially half of the tubular member intact.

3. The medical catheter of claim 1, wherein a proximal end of the outer tubular member is bonded to a proximal end of the inner tubular member at a distal joint.

4. The medical catheter of claim 1, further comprising a guidewire port opening into a lumen of the inner tubular member at the distal joint.

5. The medical catheter of claim 4, wherein at least a portion of the skived distal portion extends distal of the distal joint.

6. The medical catheter of claim 5, wherein the at least a portion of the skived distal portion is positioned between an outer surface of the inner tubular member and an inner surface of the outer tubular member.

7. The medical catheter of claim 5, further comprising a core wire positioned in an inflation lumen defined between an outer surface of the inner tubular member and an inner surface of the outer tubular member.

8. The medical catheter of claim 7, wherein the core wire has a proximal end located proximal of the skived distal portion and a distal end located distal of the skived distal portion.

9. The medical catheter of claim 1, wherein the midshaft section includes a thermoplastic tubular sleeve surrounding at least a portion of the tubular member of the midshaft section.

10. The medical catheter of claim 9, wherein the thermoplastic tubular sleeve is bonded to at least one of the inner tubular member and the outer tubular member of the distal section.

11. The medical catheter of claim 9, wherein the thermoplastic tubular sleeve is bonded to both the inner tubular member and the outer tubular member of the distal section at a distal joint.

12. A medical catheter comprising:

a hub assembly; and

an elongate shaft extending distally from the hub assembly, the elongate shaft including a proximal section, a midshaft section, and a distal section extending along a longitudinal axis of the shaft;

the midshaft section including a cylindrical tubular member having a lumen and including a skived distal portion having a compound cut surface including a first planar cut surface portion through a wall of the cylindrical tubular member and a second planar cut surface portion through the wall of the cylindrical tubular member, wherein the first planar cut surface portion is parallel to a longitudinal axis of the tubular member and non-parallel to the second planar cut surface portion, wherein the skived distal portion has half or less than half the circumference of the tubular member removed at the second planar cut surface such that a cross section taken perpendicular to the longitudinal axis is substantially a half circle, wherein the second planar cut surface exposes the lumen of the cylindrical tubular member and extends along a plane that transects the cylindrical tubular member at an acute angle to the longitudinal axis;

the distal section including an outer tubular member and an inner tubular member disposed within the outer tubular member; and

wherein the skived distal portion of the tubular member overlaps a proximal portion of the outer tubular member of the distal section.

13. The medical catheter of claim 12, wherein a proximal end of the outer tubular member is bonded to a proximal end of the inner tubular member at a distal joint.

14. The medical catheter of claim 12, further comprising a guidewire port opening into a lumen of the inner tubular member at the distal joint.

15. The medical catheter of claim 14, wherein at least a portion of the skived distal portion extends distal of the distal joint.

16. The medical catheter of claim 15, wherein the at least a portion of the skived distal portion is positioned between an outer surface of the inner tubular member and an inner surface of the outer tubular member.

17. The medical catheter of claim 15, further comprising a core wire positioned in an inflation lumen defined between an outer surface of the inner tubular member and an inner surface of the outer tubular member.

18. The medical catheter of claim 17, wherein the core wire has a proximal end located proximal of the skived distal portion and a distal end located distal of the skived distal portion.

19. The medical catheter of claim 12, wherein the midshaft section includes a thermoplastic tubular sleeve surrounding at least a portion of the tubular member of the midshaft section.

20. The medical catheter of claim 19, wherein the thermoplastic tubular sleeve is bonded to at least one of the inner tubular member and the outer tubular member of the distal section.