BIODEGRADABLE, BIOABSORBABLE STENT ANCHORS

• US 20120283811A1
• Filed: 04/25/2012
• Published: 11/08/2012
• Est. Priority Date: 05/02/2011
• Status: Abandoned Application

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Neilan, John
• Application Number:
  US13/455,401
• Publication Number:
  US 20120283811A1
• Time in Patent Office: Days
• US Class Current: 623/1.2
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• 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 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal

Abstract

Biodegradable/bioabsorbable stent anchors are provided to prevent stent migration and permit repositioning and/or removal of the stent after the anchors or portion thereof has sufficiently degraded or been absorbed.

Claims

1. A stent comprising:

a stent body comprising an elongated tubular body having a proximal portion, a distal portion, and a lumen extending throughout;

wherein the elongated tubular body comprises a substantially cylindrical configuration and is configured such that tissue in-growth is prevented; and

an anchor disposed about the elongated tubular body of the stent, wherein the anchor comprises a biodegradable or bioabsorbable material configured to degrade or absorb at about a known rate.

2. The stent of claim 1, wherein the anchor further comprises a plurality of anchors.

3. The stent of claim 1, wherein the anchor comprises an annular ring comprising a plurality of struts, wherein at least a portion of the struts each comprises an open cell disposed therethrough.

4. The stent of claim 1, wherein the anchor comprises a barb.

5. The stent of claim 1, wherein the elongated tubular body comprises a wire configured into a mesh structure.

6. The stent of claim 1, wherein the elongated tubular body comprises a coating disposed about an outer surface of the elongated tubular body.

7. The stent of claim 1, wherein the anchor is disposed at a proximal or distal end of the elongated tubular body.

8. The stent of claim 1, wherein the elongated tubular body is configured to self-expand.

9. The stent of claim 1, wherein the anchor is configured to degrade or absorb in about a three-month time period.

10. A stent comprising:

an elongated tubular body configured for maintaining open a bodily pathway;

wherein the elongated tubular body comprises a substantially cylindrical metal framework and a covering disposed on at least a portion of the substantially cylindrical metal framework;

a plurality of anchors connected to the elongated tubular body, wherein the plurality of anchors comprise a biodegradable or bioabsorbable material configured to degrade or absorb at about a known rate;

wherein the plurality of anchors further comprise;

a first set of anchors comprising a first annular ring and a first plurality of struts connected to the first annular ring, wherein the first annular ring is connected to a proximal end of the elongated tubular body; and

a second set of anchors comprising a second annular ring and a second plurality of struts connected to the second annular ring, wherein the second annular ring is connected to a distal end of the elongated tubular body, and

wherein at least a portion of the struts each comprises an open cell disposed therethrough.

11. The stent of claim 10, wherein the metal framework comprises a mesh structure.

12. The stent of claim 10, wherein the elongated tubular body is configured to self-expand.

13. The stent of claim 10, wherein the plurality of anchors are configured to degrade or absorb in about a three-month time period.