Solvating system and sealant for medical use in the middle or inner ear

• US 7,959,943 B2
• Filed: 04/24/2007
• Issued: 06/14/2011
• Est. Priority Date: 05/10/2006
• Status: Active Grant

• Current Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Inventors: Myntti, Matthew F., Lewis, Cecil O., Hissong, James Britton, Oliver, Dana A.
• Primary Examiner(s): Blanchard; David J
• Assistant Examiner(s): ZISKA, SUZANNE E
• Application Number:
  US11/739,528
• Publication Number:
  US 20070264310A1
• Time in Patent Office: 1,512 Days
• Field of Search: None
• US Class Current: 424/437
• CPC Class Codes: A61F 11/202 Surgical middle-ear ventilation or drainage, e.g. permanent; Implants therefor
• CPC Class Codes: A61K 9/0046 Ear

Abstract

Chronic Otitis Media with Effusion (COME), Recurrent Acute Otitis Media (RAOM), cholesteatoma, and other bacterial ear conditions may be treated by applying a solvating system containing greater than 0.2 wt. % surfactant to a bacterial biofilm in the middle or inner ear, disrupting the biofilm, and applying a protective layer of a polymeric film-forming medical sealant.

Claims

1. A method for treating chronic otitis media and other bacterial ear conditions, which method comprises:

a) applying an aqueous solvating system comprising a metal ion sequestering agent and greater than 0.2 wt. % surfactant to a treatment site comprising a bacterial biofilm comprising an extracellular polysaccharide matrix attached or adhered to at least a portion of the middle or inner ear,

b) detaching, removing or otherwise disrupting at least a part of the biofilm by solvating the extracellular polysaccharide matrix with the solvating system and then rinsing away the solvating system, and then

c) applying to the treatment site a protective layer of a polymeric film-forming sealant.

2. A method according to claim 1 wherein the treatment site is in the middle ear.

3. A method according to claim 1 wherein the treatment site is in the inner ear.

4. A method according to claim 1 comprising applying the solvating system by spraying, lavage, misting, mopping, wicking or dripping.

5. A method according to claim 1 comprising applying the sealant by spraying, lavage, misting, mopping, wicking or dripping.

6. A method according to claim 1 comprising applying the solvating system and sealant directly in the middle ear.

7. A method according to claim 6 comprising applying the sealant as a film or conformal coating.

8. A method according to claim 7 comprising applying the sealant without filling the middle or inner ear.

9. A method according to claim 1 wherein the surfactant comprises a cationic surfactant.

10. A method according to claim 1 wherein the surfactant comprises a zwitterionic surfactant.

11. A method according to claim 1 wherein the surfactant is about 0.3% to about 30% of the solvating system.

12. A method according to claim 1 wherein the surfactant is about 0.5% to about 25% of the solvating system.

13. A method according to claim 1 wherein the metal ion sequestering agent comprises a sequestering agent for sodium, calcium or iron.

14. A method according to claim 1 wherein the metal ion sequestering agent comprises citric acid.

15. A method according to claim 1 wherein the metal ion sequestering agent is present at a concentration of about 0.01 to about 0.5 M.

16. A method according to claim 1 wherein the solvating system has a pH of about 5 to about 8.5.

17. A method according to claim 16 wherein the solvating system further comprises a buffer.

18. A method according to claim 1 wherein the solvating system further comprises an antimicrobial agent.

19. A method according to claim 1 wherein the sealant is viscoelastic.

20. A method according to claim 1 wherein the sealant hardens after application.

21. A method according to claim 1 wherein the sealant comprises a polysaccharide.

22. A method according to claim 21 wherein the sealant comprises cellulose, chitin, chitosan, dextran, glycogen, glycosaminoglycan, gum, pectin, starch, or a derivative thereof.

23. A method according to claim 1 wherein the sealant comprises hyaluronan.

24. A method according to claim 1 wherein the sealant comprises carboxymethyl cellulose.

25. A method according to claim 1 wherein the sealant comprises a lipid or polypeptide.

26. A method according to claim 1 wherein the solvating system or sealant further comprises an antimicrobial agent.

27. A method according to claim 26 wherein the antimicrobial agent comprises gallium acetoacetonate, gallium bromide, gallium chloride, gallium fluoride, gallium iodide, gallium maltolate, gallium nitrate, gallium nitride, gallium percolate, gallium phosphite, gallium sulfate or mixture thereof.

28. A method according to claim 1 further comprising applying an antimicrobial agent after application of the solvating system and before application of the sealant.

29. A method according to claim 1 wherein the same steps performed in vitro will cause greater than a 1-log order reduction in a population of one or more of Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pneumonia, Haemophilus influenzae or Moraxella catarrhalis bacteria.

30. A method according to claim 1 wherein the same steps performed in vitro will cause greater than a 2-log order reduction in a population of one or more of Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pneumonia, Haemophilus influenzae or Moraxella catarrhalis bacteria.

31. A method according to claim 1 wherein the same steps performed in vitro will cause greater than a 3-log order reduction in a population of one or more of Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pneumonia, Haemophilus influenzae or Moraxella catarrhalis bacteria.

32. A method according to claim 1 wherein the sealant further comprises an anti-fungal agent, antihistamine, steroidal or non-steroidal anti-inflammatory agent, anti-parasitic agent, antiviral agent, chemotherapeutic/antineoplastic agent, decongestant or mucolytic.

33. A method according to claim 1 wherein the solvating system or sealant further comprises a steroid.