Methods and devices for maintaining patency of surgically created channels in a body organ

• US 20050043751A1
• Filed: 07/19/2004
• Published: 02/24/2005
• Est. Priority Date: 09/04/2001
• Status: Active Grant

• Current Assignee: Broncus Medical Incorporated
• Original Assignee: Broncus Technologies, Inc
• Inventors: Roschak, Ed, Phan, Loc
• Granted Patent: US 7,708,712 B2
• Time in Patent Office: Days
• US Class Current: 606/155
• CPC Class Codes: A61B 17/00491 Surgical glue applicators surgical adhesives A61L24/00; two-component delivery syringes A61M5/19
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/083 Clips, e.g. resilient
• CPC Class Codes: A61B 17/10 for applying or removing wound clamps, e.g. containing only one clamp or staple A61B17/076 takes precedence; containing multiple wound clamps A61B17/068; Wound clamp magazines containers, packaging elements or packages specially adapted for particular articles or with special means for dispensing contents B65D83/00, B65D85/00
• CPC Class Codes: A61B 17/12104 in an air passage
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2017/00809 Lung operations
• CPC Class Codes: A61B 2018/00541 Lung or bronchi
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector

Abstract

This is directed to methods and devices suited for maintaining an opening in a wall of a body organ for an extended period. More particularly devices and methods are directed maintaining patency of channels that alter gaseous flow within a lung to improve the expiration cycle of, for instance, an individual having chronic obstructive pulmonary disease.

Claims

1. An implant for maintaining an opening in a wall of a body organ, the implant having a delivery state and an expanded state, the implant comprising:

a support member where at least a first portion of the support member comprises a plurality of control segments folded in a curvilinear shape, upon assuming the expanded state the control segments unfold and are located circumferentially about the support member to limit expansion of the first portion of the support member, where the support member has at least a second portion unconstrained to expand beyond the first portion such that upon expansion the support member is non-cylindrical; and

a composition located on the support member and comprising an antiproliferative agent.

2. The implant of claim 1, where the support member further comprises a third portion on an end of the support member opposite to that of the second portion, the third portion is unconstrained to expand beyond the first portion, such that upon expansion the support member forms a grommet shape.

3. The implant of claim 1, where the curvilinear shape is selected from a group consisting of an s-shape, a v-shape, a u-shape, and a sinusoidal shape.

4. The implant of claim 1, where the composition comprises an amount of antiproliferative agent that does not exhibit substantial cytotoxicity but controls the healing response by suppressing hyperplasia of lung tissue, to maintain patency of an artificial opening located in the airway which allows for maintaining air passage between the opening and parenchyma for a sufficient time until the healing response of the lung tissue subsides such that the opening essentially becomes a natural airway passage.

5. The implant of claim 1, where the composition further comprises a polymer.

6. The implant of claim 5, where the composition comprises both a release rate and an amount of antiproliferative substance sufficient to modify a healing response of lung tissue resulting from creation of the opening.

7. The implant of claim 5, where the polymer is selected from a group consisting of thermoplastic polymers, thermoset polymers, acrylate polymers, a blend of acrylate-methacrylate polymers, silicone elastomers, urethane elastomers, ethylene vinyl acetate polymers, polyethylene, polypropylene, PLA-PGA, PLA, PGA, polyortho-ester, polycapralactone, polyester, hydrogels, polystyrene, co-polymers of styrene-isobutylene-styrene, and combinations or blends thereof.

8. The conduit of claim 5, further comprising a dye located in the polymer to aid in identification of the implant during placement.

9. The implant of claim 5, where the composition fully covers an outer surface of the support member.

10. The implant of claim 9, where the polymer fully encapsulates an interior surface of the support member.

11. The implant of claim 5, where the support member comprises a second polymeric material.

12. The implant of claim 11, where the polymer and second polymeric material are bioabsorbable.

13. The implant of claim 1, where the support member has at least one pocket where the antiproliferative substance is located in the pocket, and further comprising a polymer at least covering the pocket to act as a barrier to release.

14. The implant of claim 1, where the support member comprises a metallic material.

15. The implant of claim 1, where the support member comprises a plurality of members forming a mesh having a plurality of interstices.

16. The implant of claim 15, where the composition further includes a polymer and the composition covers the members but not the interstices.

17. The implant of claim 1, where the antiproliferative substance comprises a microtubule stabilizing agent.

18. The implant of claim 17, where the microtubule stabilizing agent is paclitaxel.

19. The implant of claim 1, where the antiproliferative substance comprises a microtubule destabilizing agent.

20. The implant of claim 19, where the microtubule destabilizing agent is selected from the group comprising vincristine, vinblastine, podophylotoxin, estramustine, noscapine, griseofulvine, dicoumarol, a vinca alkaloid, and a combination thereof.

21. The implant of claim 1, where the antiproliferative substance comprises a substance selected from the group consisting of steroids, non-steroidal anti-inflammatories, and d-actinomycin, and a combination thereof.

22. The implant of claim 1, where the antiproliferative substance comprises a cytostatic agent.

23. The implant of claim 22, where the cytostatic agent is selected from the group consisting of:

sirolimus, everolimus, ABT-578, biolimus, tacrolimus, and a combination thereof.

24. The implant of claim 1, further comprising a mucus affecting substance.

25. The implant of claim 24, where the mucus affecting substance is selected from a group consisting of mucolytics, pulmozyme, and a combination thereof.

26. The implant of claim 1, further comprising at least one visualization mark disposed on a portion of the support member.

27. The implant of claim 26, where the visualization mark comprises a stripe circumferentially disposed about at least a portion the support member.

28. The implant of claim 1, further comprising a one-way valve in fluid communication with the interior passage.

29. The implant of claim 1, further comprising an antibiotic substance carried on or within the support member.

30. The implant of claim 1, further comprising a barrier located within the support member.

31. The implant of claim 1, further comprising a fibrin reducing substance.

32. The implant of claim 31, where the fibrin reducing substance is selected from a group consisting of streptokinase, urokinase, and tissue plasminogen activator.