BALLOON CATHETER WITH NON-DEPLOYABLE STENT

• US 20110125247A1
• Filed: 02/07/2011
• Published: 05/26/2011
• Est. Priority Date: 11/09/2001
• Status: Active Grant

• Current Assignee: Spectranetics LLC (Koninklijke Philips N.V.)
• Original Assignee: Angioscore Incorporated (Koninklijke Philips N.V.)
• Inventors: Farnan, Robert C., Ram, Anand, Hoyns, Dirk Voland
• Granted Patent: US 10,086,178 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• 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 or non-slip
• 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 method for performing angioplasty in a blood vessel, said method comprising:

introducing a balloon catheter into a blood vessel, said catheter having a shaft and an inflatable balloon;

inflating the balloon to radially expand a non-deployable stent, wherein a central portion of the stent shortens in length as the stent is radially expanded, wherein the non-deployable stent includes (1) ends which are attached to the shaft of the balloon catheter and (2) a region which expands longitudinally to compensate for foreshortening of the length which results from radial expansion; and

deflating the balloon to allow the non-deployable stent to collapse over the balloon as it deflates.

2. A method as in claim 1, wherein the non-deployable stent comprises two ends attached to the shaft of the balloon catheter, one end being attached on each side of the balloon.

3. A method as in claim 2, wherein said region that expands includes at least one extension section between the end and the central section.

4. A method as in claim 3, wherein said region that expands includes a second extension section between the other end and the central section.

5. A method as in claim 2, wherein the non-deployable stent includes one or more elongation links along a length of the central section.

6. A method as in claim 1, wherein the central section of the non-deployable stent comprises a plurality of serpentine rings.

7. An angioplasty catheter comprising:

a catheter shaft having a distal end and proximal end;

an inflatable balloon disposed near the distal end of the catheter shaft;

a non-deployable stent disposed over the inflatable balloon, said stent including a central section which radially expands and axially foreshortens when the balloon is inflated, an end, and an extension section between the end and the central section;

wherein the end of the stent is attached to the shaft on at least one side of the balloon and wherein the extension section of the stent longitudinally expands to accommodate axial shortening of the central section of the stent upon radial expansion of the stent resulting from balloon expansion.

8. An angioplasty catheter as in claim 7, wherein the stent includes a second end which is sandwiched between a sleeve and the catheter shaft on another side of the balloon.

9. An angioplasty catheter as in claim 8, the stent further comprises a second extension section between the second end and the central section of the stent.

10. An angioplasty catheter as in claim 9, wherein the central section comprises a plurality of axially joined serpentine rings.

11. An angioplasty catheter as in claim 8, further comprising at least one elongation link between adjacent serpentine rings in the central section of the stent.

12. An angioplasty catheter as in claim 11, including a plurality of elongation links between adjacent serpentine rings in the central section of the stent.