Implantable medical device with reduced migration capabilities

• US 10,524,939 B2
• Filed: 01/14/2016
• Issued: 01/07/2020
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Mort, Paul G., Mannion, Paul
• Primary Examiner(s): Baria, Dinah
• Application Number:
  US14/996,164
• Publication Number:
  US 20160206449A1
• Time in Patent Office: 1,454 Days
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/009 for hindering or preventing attachment of biological tissue
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2250/0059 temporary

Abstract

Medical devices and methods for making and using a medical device are disclosed. An example medical device may include an implantable medical device. The implantable medical device may include a stent having a covered portion and an uncovered portion. The covered portion may be releasably attached to the uncovered portion. A cover member may be disposed along the covered portion. The uncovered portion may include a release tab that is designed to release the uncovered portion from the covered portion. A removal member may be coupled to the covered portion for aiding in the removal of the covered portion from an implantation site.

Claims

1. An implantable medical device, comprising:

a stent having a covered portion and an uncovered portion;

wherein a proximal end of the covered portion is releasably attached to a distal end of the uncovered portion;

a cover member disposed along the covered portion;

wherein the uncovered portion includes a release tab that is designed to release the uncovered portion from the covered portion, wherein the release tab is disposed at a proximal end of the uncovered portion, wherein proximally pulling the release tab detaches the uncovered portion of the stent from the covered portion of the stent; and

a removal member coupled to the covered portion for aiding in the removal of the covered portion from an implantation site.

2. The implantable medical device of claim 1, wherein the covered portion of the stent includes a braid.

3. The implantable medical device of claim 1, wherein the uncovered portion of the stent includes a crocheted wire.

4. The implantable medical device of claim 1, wherein the uncovered portion of the stent is formed from a single wire.

5. The implantable medical device of claim 1, wherein the uncovered portion of the stent is designed to permit tissue ingrowth therein so as to reduce migration of the stent.

6. The implantable medical device of claim 1, wherein the covered portion, the uncovered portion, or both have a flared end region.

7. The implantable medical device of claim 1, wherein the cover member is designed to substantially reduce tissue ingrowth along the covered portion of the stent.

8. The implantable medical device of claim 1, wherein the uncovered portion of the stent includes a biodegradable material.

9. The implantable medical device of claim 1, wherein the removal member includes a suture disposed about the covered portion of the stent.

10. An implantable medical device, comprising:

a stent having a braided portion and a crocheted portion;

wherein the braided portion is releasably attached to a first end region of the crocheted portion; and

a cover member disposed along the braided portion;

wherein the cover member is designed to limit tissue ingrowth along the braided portion;

wherein the crocheted portion includes a release tab at a second end region of the crocheted portion opposite the first end region, and wherein pulling the release tab unravels the crocheted portion of the stent and detaches the crocheted portion of the stent from the braided portion of the stent; and

wherein the crocheted portion of the stent is designed to permit tissue ingrowth therein so as to reduce migration of the stent.

11. The implantable medical device of claim 10, wherein the crocheted portion of the stent is formed from a single wire.

12. The implantable medical device of claim 10, wherein the braided portion, the crocheted portion, or both have a flared end region.

13. The implantable medical device of claim 10, wherein a removal member is coupled to the braided portion for aiding in the removal of the braided portion from an implantation site.

14. The implantable medical device of claim 10, wherein the crocheted portion of the stent includes a biodegradable material.

15. An implantable medical device, comprising:

a stent having a covered portion extending to a first end of the stent, and an uncovered portion extending from the covered portion to a second end of the stent;

wherein the uncovered portion of the stent is formed from a single crocheted wire having a plurality of loops for allowing tissue ingrowth therein;

a cover member disposed along the covered portion to limit tissue ingrowth therein;

a release tab located at a terminal end of the single crocheted wire at the second end of the stent, wherein the single crocheted wire forming the uncovered portion is configured to be unraveled via proximally pulling the release tab to remove the stent from a body lumen;

wherein the covered portion comprises a plurality of braided wires forming a braded tubular member; and

wherein the covered portion is releasably attached to the uncovered portion.

16. The implantable medical device of claim 15, further comprising a removal member coupled to the covered portion for aiding in the removal of the covered portion from a body lumen.

17. The implantable medical device of claim 15, wherein the crocheted wire extends through loops of the braided tubular member.

18. The implantable medical device of claim 15, wherein the uncovered portion comprises a biodegradable material configured to bioabsorbed to release the uncovered portion from the covered portion.