Stent

• US 10,117,760 B2
• Filed: 06/03/2016
• Issued: 11/06/2018
• Est. Priority Date: 04/02/2009
• Status: Active Grant

• Current Assignee: Q3 Medical Devices Limited (Boill Holding Group Co., Ltd.)
• Original Assignee: Q3 Medical Devices Limited (Boill Holding Group Co., Ltd.)
• Inventors: Mangiardi, Eric K.
• Primary Examiner(s): Schillinger, Ann
• Application Number:
  US15/173,312
• Publication Number:
  US 20160310299A1
• Time in Patent Office: 886 Days
• CPC Class Codes: A61B 17/7233 with special means of locking the nail to the bone
• CPC Class Codes: A61B 17/7258 with laterally expanding parts, e.g. for gripping the bone
• CPC Class Codes: A61B 17/7266 with fingers moving radially outwardly
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61B 17/7291 for small bones, e.g. in the foot, ankle, hand or wrist
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2002/041 Bile ducts
• CPC Class Codes: A61F 2002/048 Ureters
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/30289 helically-coiled
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0061 swellable
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body

Abstract

A stent is disclosed that has an elongated body having a proximal end, a distal end, at least one open spiral channel formed on the exterior surface of the body to provide fluid communication between the proximal end and the distal end. The stent also has a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire. A method for using the stent and a kit containing the stent are also disclosed.

Claims

1. A stent comprising:

an elongated body having a proximal end, a distal end, at least one open spiral channel formed on the exterior surface of said body to provide fluid communication between said proximal end and said distal end, and

a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire, wherein the central lumen has a circular, oval or elliptical cross-section and is not in fluid communication with the open spiral channel.

2. The stent of claim 1, wherein the body is composed of a bioabsorbable polymer.

3. The stent of claim 1, wherein said at least one open spiral channel has a rotation rate of between about 1.5 and 2.5 twists per inch.

4. The stent of claim 1, wherein said at least one open spiral channel has a rotation rate of at least about 2 twists per inch.

5. The stent of claim 1, comprising two open spiral channels formed on the exterior surface of said body.

6. The stent of claim 5, wherein said channels are on opposite sides on the exterior surface of said body.

7. The stent of claim 1, wherein said body further comprises an anti-migration device.

8. The stent of claim 1, wherein said body further comprises a biological agent.

9. The stent of claim 8, wherein said biological agent is selected from the group consisting of chemotherapeutic agents, antimicrobial agents and gene transfer agents.

10. The stent of claim 1, wherein said stent has a pre-implantation diameter (D_pre) and is in situ expandable upon absorption of a body fluid to a post-implantation diameter (D_post), wherein D_post is greater than D_pre.

11. The stent of claim 1, further comprising a radio-opaque substance.

12. The stent of claim 1, wherein the open spiral channels are formed integrally on the exterior surface of the elongated body, and

wherein the central lumen has a circular cross-section.

13. A stent comprising:

an elongated body composed of a bioabsorbable polymer and having a proximal end, a distal end, at least one open spiral channel formed on the exterior surface of said body to provide fluid communication between said proximal end and said distal end, wherein said at least one open spiral channel has a rotation rate of at least 1 twist per inch, and

a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire, wherein the central lumen has a circular, oval or elliptical cross-section and is not in fluid communication with the open spiral channel.

14. The stent of claim 13, wherein said bioabsorbable polymer comprises PEG and p-dioxanone.

15. The stent of claim 13, wherein said bioabsorbable polymer comprises PPDO.

16. The stent of claim 13, wherein said bioabsorbable polymer comprises PLA, trimethylene carbonate and caprolactone.

17. The stent of claim 13, wherein said at least one open spiral channel has a rotation rate of at least about 2 twists per inch.

18. The stent of claim 13, comprising two open spiral channels formed on the exterior surface of said body.

19. The stent of claim 18, wherein said channels are on opposite sides on the exterior surface of said body.

20. A stent comprising:

an elongated body having a proximal end, a distal end, at least one open spiral channel formed on the exterior surface of said body to provide fluid communication between said proximal end and said distal end, wherein said at least one open spiral channel has a rotation rate of between about 1.5 and 3.5 twists per inch, and

a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire, wherein the central lumen has a circular, oval or elliptical cross-section and is not in fluid communication with the open spiral channel.

21. The stent of claim 20, comprising two open spiral channels formed on the exterior surface of said body.

22. The stent of claim 21, wherein said channels are on opposite sides on the exterior surface of said body.

23. A stent comprising:

an elongated body composed of a bioabsorbable polymer and having a proximal end, a distal end, a pair of open spiral channels formed on the exterior surface of said body to provide fluid communication between said proximal end and said distal end, wherein said spiral channels have a rotation rate of at least about 1 twist per inch, and

a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire, wherein the central lumen has a circular, oval or elliptical cross-section and is not in fluid communication with the open spiral channels.

24. The stent of claim 23, wherein said channels are on opposite sides on the exterior surface of said body.