Sinus delivery of sustained release therapeutics

• US 7,951,131 B2
• Filed: 09/15/2010
• Issued: 05/31/2011
• Est. Priority Date: 03/14/2003
• Status: Active Grant

• Current Assignee: Intersect ENT, Inc. (Medtronic Plc)
• Original Assignee: Intersect ENT, Inc. (Medtronic Plc)
• Inventors: Brenneman, Rodney A., Eaton, Donald J., Moran, Mary L.
• Primary Examiner(s): Stigell; Theodore J
• Assistant Examiner(s): Witczak; Catherine N
• Application Number:
  US12/883,079
• Publication Number:
  US 20110004195A1
• Time in Patent Office: 258 Days
• Field of Search: 604/93.01, 604/891.1, 604/57, 604 59- 64, 604/510, 604/514, 604/506, 424/434, 606/196
• US Class Current: 604/506
• CPC Class Codes: A61K 31/43 Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems
• CPC Class Codes: A61K 31/573 substituted in position 21, e.g. cortisone, dexamethasone, prednisone or aldosterone
• CPC Class Codes: A61K 31/58 containing heterocyclic rings, e.g. danazol, stanozolol, pancuronium or digitogenin digitoxin A61K31/7048
• CPC Class Codes: A61K 47/34 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers A61K47/10 takes precedence
• CPC Class Codes: A61K 9/0024 Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue compositions for intravenous administration, normal injectable solutions or dispersions for, e.g. subcutaneous administration A61K9/0019; brain implants A61K9/0085; (coated) prostheses, catheters or stents A61L
• CPC Class Codes: A61K 9/0043 Nose
• CPC Class Codes: A61M 31/007 Injectors for solid bodies, e.g. suppositories
• CPC Class Codes: A61P 11/00 Drugs for disorders of the respiratory system
• CPC Class Codes: A61P 11/02 Nasal agents, e.g. decongestants

Abstract

The invention provides biodegradable implants for treating sinusitis. The biodegradable implants have a size, shape, density, viscosity, and/or mucoadhesiveness that prevents them from being substantially cleared by the mucociliary lining of the sinuses during the intended treatment period. The biodegradable implants include a sustained release therapeutic, e.g., an antibiotic, a steroidal anti-inflammatory agent, or both. The biodegradable implants may take various forms, such as rods, pellets, beads, strips, or microparticles, and may be delivered into a sinus in various pharmaceutically acceptable carriers.

Claims

1. A method for delivering a drug-releasing implant into a paranasal sinus cavity comprising:

a) loading a delivery device with one or more drug-releasing implants;

b) creating access to the paranasal sinus cavity with the loaded delivery device such that at least a portion of the delivery device is advanced into the paranasal sinus cavity; and

c) delivering the one or more drug-releasing implants from the delivery device-into the paranasal sinus cavity,

wherein the one or more drug-releasing implants comprise a therapeutic amount of an active agent for the treatment of sinusitis.

2. The method of claim 1 wherein the one or more drug-releasing implants is a solid implant having a first delivery form for facilitating delivery into the sinus cavity and a second form, different from the first form, the second form having a shape that substantially prevents clearance of the implant from the sinus cavity.

3. The method of claim 1 wherein the one or more drug-releasing implants has a diameter of about 5 millimeters while in the conduit.

4. The method of claim 1 wherein delivering the one or more drug-releasing implants comprises delivering the one or more drug-releasing implants with a pusher.

5. The method of claim 1 wherein delivering the one or more drug-releasing implants comprises delivering the one or more drug-releasing implants with a pressurized gas.

6. The method of claim 1 wherein the one or more drug-releasing implants is a biodegradable polymeric implant.

7. The method of claim 1 wherein the delivery device Comprises a conduit.

8. The method of claim 1 wherein a distal portion of the delivery device is angulated.

9. The method of claim 8 wherein the distal portion of the delivery device is angulated at an angle between about zero degrees to about 135 degrees.

10. The method of claim 7 wherein the conduit comprises a distal opening at a tip of the conduit.

11. The method of claim 7 wherein the conduit comprises a distal opening in a side wall of the conduit.

12. The method of claim 1 wherein the one or more drug-releasing implants comprises a series of predetermined fracture lines.

13. The method of claim 1 wherein the one or more drug-releasing implants comprises a therapeutic amount of an anti-inflammatory active agent.

14. The method of claim 13 wherein the anti-inflammatory active agent comprises mometasone furoate.

15. The method of claim 13 wherein the anti-inflammatory active agent comprises budesonide.

16. The method of claim 13 wherein the anti-inflammatory active agent comprises fluticasone propionate.

17. The method of claim 13 wherein the anti-inflammatory active agent comprises triamcinolone acetonide.

18. The method of claim 1 wherein the one or more drug-releasing implants comprises a biodegradable matrix.

19. The method of claim 18 wherein the biodegradable matrix comprises a biodegradable polymer matrix.

20. The method of claim 19 wherein the biodegradable polymer matrix comprises a mucoadhesive polymer.

21. The method of claim 19 wherein the biodegradable polymer matrix comprises a poly(lactic-co-glycolic)acid (PLGA) copolymer.

22. The method of claim 19 wherein the biodegradable polymer matrix comprises lactic acid.

23. The method of claim 19 wherein the biodegradable polymer matrix comprises glycolic acid.

24. The method of claim 1 wherein the active agent is released over a treatment period of about one week to about three months.

25. The method of claim 1 wherein the active agent is released over a treatment period of about two weeks to about four weeks.

26. The method of claim 1 wherein the active agent is released over a treatment period of at least about one week.

27. The method of claim 1 wherein the active agent is released over a treatment period of at least about two weeks.

28. The method of claim 1 wherein the one or more drug-releasing implants comprises an active agent in an amount between about 5% and about 90% by weight of the one or more drug-releasing implants.

29. The method of claim 1 wherein the one or more drug-releasing implants is a rod, pellet, bead, strip, or microparticle.

30. The method of claim 1 wherein creating access to the paranasal sinus cavity comprises puncturing a sinus wall of the paranasal sinus.

31. A method for delivering a drug-releasing implant into a paranasal sinus cavity comprising:

a) loading a delivery device with one or more drug-releasing implants;

b) creating access to the paranasal sinus cavity with the loaded delivery device such that at least a portion of the delivery device is advanced into the paranasal sinus cavity; and

c) delivering the one or more drug-releasing implants from the delivery device-into the paranasal sinus cavity,

wherein the one or more drug-releasing implants comprise a therapeutic amount of an active agent for the reduction of inflammation.

32. The method of claim 31 wherein creating access to the paranasal sinus cavity comprises puncturing a sinus wall of the paranasal sinus.