Balloon catheter with non-deployable stent

• US 20040111108A1
• Filed: 08/29/2003
• Published: 06/10/2004
• Est. Priority Date: 11/09/2001
• Status: Abandoned Application

• Current Assignee: Angioscore Incorporated (Koninklijke Philips N.V.)
• Original Assignee: Angioscore Incorporated (Koninklijke Philips N.V.)
• Inventors: Farnan, Robert C.
• Application Number:
  US10/651,557
• Publication Number:
  US 20040111108A1
• Time in Patent Office: Days
• US Class Current: 606/194
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/00858 high friction, non-slip on handles A61B2017/00429
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0058 X-shaped
• CPC Class Codes: A61F 2230/0067 conical
• 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 2025/1088 having special surface characteristics depending on material properties or added substances, e.g. for reducing friction
• CPC Class Codes: A61M 2025/109 having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
• 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 25/1027 Making of balloon catheters
• CPC Class Codes: A61M 25/104 : used for angioplasty

Abstract

An angioplasty balloon including a non-deployable stent to prevent or reduce the potential for slippage of the inflated balloon with respect to the vessel wall being treated. The balloon includes a non-deployable stent that is adapted to be secured to the balloon or angioplasty balloon catheter. The stent has a proximal end, a distal end, and at least one extension section, at least one set of serpentine rings and at least one set of elongation links that allow expansion of the strut to accommodate the inflation of the balloon. The stent is made of a material so that the stent collapses upon deflation of the balloon.

Claims

1. A non-deployable stent adapted to be secured to an angioplasty balloon catheter comprising:

a proximal end;

a distal end;

at least one extension section, at least one set of serpentine rings and at least one set of elongation links connecting the proximal end to the distal end, to allow expansion of the stent to accommodate the inflation of the balloon; and

the stent being made of a material having a memory so that the stent collapses upon deflation of the balloon.

2. The stent of claim 1 wherein the stent is made of an alloy of nickel and titanium.

3. The stent of claim 1 wherein one extension section is located on the proximal end of the stent and another extension section is located on the distal end of the stent.

4. The stent of claim 1 comprising at least three sets of serpentine rings.

5. The stent of claim 4 wherein a set of elongation links is located between said sets of serpentine rings.

6. The stent of claim 1 wherein said serpentine rings have a serpentine shape.

7. The stent of claim 1 wherein said elongation links have a Z shape.

8. The stent of claim 1 wherein said elongation links have a zig-zag shape.

9. The stent of claim 1 wherein the stent is made of a laser-cut hypotube.

10. The stent of claim 1 wherein at least one end of the stent is secured to the balloon using an anchoring means.

11. The stent of claim 1 wherein said anchoring means is an adhesive.

12. The stent of claim 11 wherein the adhesive is a UV adhesive.

13. The stent of claim 11 wherein said anchoring means is selected from the group consisting of RF heat welding, solvent bonding, crimping at least one ends of the stent, swaging at least one end of the stent, and using a small sleeve mounted over at least one end of the stent and heat welded together where the end of the stent is sandwiched between the catheter and the sleeve.

14. The stent of claim 1 further comprising cage mounted flanges at the proximal end and the distal end.

15. The stent of claim 1 comprising four sets of serpentine rings and three sets of elongation links, wherein each set of elongation links is located between said sets of serpentine rings.

16. The stent of claim 15 wherein said elongation links have a z shape.

17. The stent of claim 16 wherein said stent is made of an alloy of nickel and titanium.

18. An angioplasty balloon catheter comprising:

an inflatable/deflatable balloon having a proximal end and a distal end; and

a non-deployable stent adapted to be secured to the balloon comprising a proximal end;

a distal end;

an extension section on said proximal end and an extension section on said distal end;

at least two sets of serpentine rings, with a set of elongation links located between said sets of serpentine rings, between said expansion sets, said extension sections, said sets of serpentine rings and said set of elongation links allow expansion of the stent to accommodate the inflation of the balloon; and

the stent being made of a material having a memory so that the stent collapses upon deflation of the balloon.

19. The angioplasty balloon of claim 18 wherein the stent is made of an alloy of nickel and titanium.

20. The angioplasty balloon of claim 18 wherein the stent is made of a laser-cut hypotube.

21. The angioplasty balloon of claim 18 wherein at least one end of the stent is secured to the balloon using an anchoring means.

22. The stent of claim 21 wherein said anchoring means is an adhesive.

23. The stent of claim 22 wherein the adhesive is a UV adhesive.

24. The stent of claim 21 wherein said anchoring means is selected from the group consisting of RF heat welding, solvent bonding, crimping at least one ends of the stent, swaging at least one end of the stent, and using a small sleeve mounted over at least one end of the stent and heat welded together where the end of the stent is sandwiched between the catheter and the sleeve.

25. The stent of claim 18 further comprising cage mounted flanges at the proximal end and distal end.

26. The stent of claim 18 comprising four sets of serpentine rings and three sets of elongation links, wherein each set of elongation links is located between said sets of serpentine rings.

27. The stent of claim 26 wherein said elongation links have a z shape.

28. The stent of claim 27 wherein said stent is made of an alloy of nickel and titanium.