Medical devices formed from polymer filaments

Patent metadata

Field	Value
Publication number	US-12150874-B2
Application number	US-202117175965-A
Country	US
Kind code	B2
Filing date	Feb 15, 2021
Priority date	Dec 29, 2016
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

Medical devices and method for manufacturing medical devices are discloses. An example medical device may include a medical device body formed from one or more multi-melting point polymeric filaments. Each of the filaments may include a polymeric blend comprising a first block polymer and a second polymer. The polymeric blend may have a first melting point and a second melting point less than the first melting point. The medical device body may be heat set at a temperature within 10° C. of the second melting point.

First claim

What is claimed is:

1. A medical device, comprising:
a medical device body formed from one or more multi-melting point polymeric filaments;
wherein each of the filaments is formed of a polymeric blend of a first block polymer that is a block polymer of poly-L-lactic acid and polycaprolactone and a second polymer is polycaprolactone;
wherein the polymeric blend has a first melting point and a second melting point less than the first melting point; and
wherein the medical device body is configured to be heat set to hold a shape at a temperature within 10° C. of the second melting point.

2. The medical device of claim 1 , wherein the first block polymer includes about 60% or more of poly-L-lactic acid.

3. The medical device of claim 1 , wherein the first block polymer includes about 70% or more of poly-L-lactic acid.

4. The medical device of claim 1 , wherein the first block polymer is biodegradable.

5. The medical device of claim 1 , wherein the one or more multi-melting point polymeric filaments are woven, knit, braided, or combinations thereof.

6. The medical device of claim 1 , wherein the medical device body includes a plurality of multi-melting point polymeric filaments.

7. The medical device of claim 1 , wherein the second melting point is in the range of about 50° C. to about 75° C.

8. A medical device, comprising:
a medical device body formed from one or more multi-melting point polymeric filaments;
wherein each of the filaments is formed of a polymeric blend of a biodegradable first block polymer that is a block polymer of poly-L-lactic acid and polycaprolactone and a second polymer is polycaprolactone;
wherein the polymeric blend has a first melting point and a second melting point less than the first melting point and greater than 37° C.; and
wherein the medical device body is configured to be heat set to hold a shape at a temperature within 10° C. of the second melting point.

9. The medical device of claim 8 , wherein the second polymer is biodegradable.

10. The medical device of claim 8 , wherein the first block polymer includes about 60% or more of poly-L-lactic acid.

11. The medical device of claim 8 , wherein the second polymer comprises about 5% or more of the polymeric blend.

12. The medical device of claim 8 , wherein the one or more multi-melting point polymeric filaments are woven, knit, braided, or combinations thereof.

13. The medical device of claim 8 , wherein the medical device body comprises a stent.

14. A stent, comprising:
a cylindrical body formed from a plurality of woven polymeric filaments;
wherein each of the plurality of woven polymeric filaments is formed of a polymeric blend of a first block polymer that is a block polymer of poly-L-lactic acid and polycaprolactone and a second polymer is polycaprolactone;
wherein the polymeric blend has a first melting point and a second melting point lower than the first melting point;
wherein the first block polymer comprises poly-L-lactic acid and polycaprolactone;
wherein the second polymer comprises polycaprolactone; and
wherein the cylindrical body is configured to be heat set into a radially expanded configuration at a temperature within 10° C. of the second melting point.

15. The stent of claim 14 , wherein the first block polymer includes about 60% or more of poly-L-lactic acid.

16. The stent of claim 14 , wherein the second polymer comprises about 5% or more of the polymeric blend.

17. The medical device of claim 1 , wherein the first block polymer comprises 70% to 95% of a total weight of the polymeric blend, and wherein the second polymer comprises about 5% to about 30% of a total weight of the polymeric blend.

18. The medical device of claim 8 , wherein the first block polymer comprises 70% to 95% of a total weight of the polymeric blend, and wherein the second polymer comprises about 5% to about 30% of a total weight of the polymeric blend.

19. The stent of claim 14 , wherein the first block polymer comprises 70% to 95% of a total weight of the polymeric blend, and wherein the second polymer comprises about 5% to about 30% of a total weight of the polymeric blend.

Assignees

• Boston Scient Scimed Inc

Inventors

• Fredrickson Gerald
• Boden Mark W
• Boutcher Emma

Classifications

• A61F2/82

  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) · CPC title

• A61L31/041 Primary

  Mixtures of macromolecular compounds · CPC title

• A61L27/14

  Macromolecular materials · CPC title

• A61F2250/0031

  made from both resorbable and non-resorbable prosthetic parts, e.g. adjacent parts · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title