Temporary absorbable venous occlusive stent and superficial vein treatment method

• US 20050107867A1
• Filed: 01/10/2004
• Published: 05/19/2005
• Est. Priority Date: 11/17/2003
• Status: Abandoned Application

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Taheri, Syde A.
• Application Number:
  US10/754,919
• Publication Number:
  US 20050107867A1
• Time in Patent Office: Days
• US Class Current: 623/1.380
• CPC Class Codes: A61B 17/0467 Instruments for cutting sutures surgical cutting instruments A61B17/32
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/1204 temporary occlusion
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2090/3954 magnetic, e.g. NMR or MRI
• CPC Class Codes: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence

Abstract

A temporary absorbable venous occlusive stent for use in a varicose vein treatment method includes a stent body, a bio-absorbable material associated with the body, and a closure for blocking blood flow past the stent when implanted in a vein. The stent produces localized blood clotting, fibrosis and vein collapse as it is absorbed. A permanent blockage is produced that prevents the undesirable back flow of blood from above the blockage site, thereby reducing distension of a varicose vein below the blockage site.

Claims

1. A temporary absorbable venous occlusive stent, comprising:

a stent body;

a bio-absorbable material associated with said body; and

closure means for blocking blood flow past said stent when implanted in a vein.

2. A stent in accordance with claim 1 wherein said stent body is generally tubular.

3. A stent in accordance with claim 1 wherein said stent body is generally cylindrical.

4. A stent in accordance with claim 1 wherein said bio-absorbable material is provided by a material used to form said stent body.

5. A stent in accordance with claim 1 wherein said bio-absorbable material comprises polylactic acid.

6. A stent in accordance with claim 1 wherein said closure means comprises a drawstring closure system at one end of said stent body.

7. A stent in accordance with claim 1 wherein said closure means comprises a drawstring closure system having a pair of drawstring ends.

8. A stent in accordance with claim 1 wherein said closure means comprises a closed end wall associated with said body.

9. A stent in accordance with claim 1 wherein said closure means comprises a closed end wall mounted on said body.

10. A stent in accordance with claim 1 wherein said closure means is provided by said stent body having a generally solid interior portion.

11. A method for treating a varicose vein, comprising:

introducing a temporary absorbable venous occlusive stent to an implantation site proximate to or above a varicose vein to be treated, said stent comprising;

a stent body;

a bio-absorbable material associated with said body; and

closure means for blocking blood flow past said stent when implanted in a vein;

deploying said stent against a vein wall at said implantation site so as to block blood flow past said stent; and

allowing said stent to form a blockage at said implantation site as said stent is absorbed.

12. A method in accordance with claim 11 wherein said stent is introduced via a deep venous system approach.

13. A method in accordance with claim 11 wherein said stent is introduced via cephalic vein approach.

14. A method in accordance with claim 11 wherein said stent is introduced via a superficial venous system approach.

15. A method in accordance with claim 11 wherein said stent is introduced via a sheath introducer.

16. A method in accordance with claim 11 wherein said stent is introduced via a sheath introducer and a guide wire.

17. A method in accordance with claim 11 wherein said stent is introduced by way of magnetic guidance.

18. A method in accordance with claim 11 wherein said stent is deployed using a balloon catheter.

19. A method in accordance with claim 11 wherein said stent is deployed using a balloon catheter and manipulation of said closure means.

20. A temporary absorbable venous occlusive stent, comprising:

a stent body comprising a bio-absorbable material; and

a closure configuration associated with said stent body for blocking blood flow past said stent when implanted in a vein.