SINUS AND NASAL STENT

• US 20180235752A1
• Filed: 08/26/2016
• Published: 08/23/2018
• Est. Priority Date: 08/26/2015
• Status: Active Grant

• Current Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Inventors: Wen, Jie, Oliver, Dana A.
• Granted Patent: US 11,759,314 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/24 for use in the oral cavity, larynx, bronchial passages or nose for medical inspection of cavities or tubes in the body A61B1/00; Tongue scrapers
• 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 2/186 Nose parts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent (100) that is sleeved and radially expandable, and which in an expanded state provides a breathable, generally tubular structure sized and shaped for residence in a sinus or nasal cavity or passage, and in an unexpanded state has a cross-sectional diameter suitable for insertion into such cavity or passage. The sleeve limits expansion and outward pressure exerted by the stent and thereby can prevent or reduce the incidence of headache in patients, and can provide increased surface area for improved elution of drugs to nearby mucosal tissue.

Claims

1. A stent that is sleeved and radially expandable, and which in an expanded state provides a breathable, generally tubular structure sized and shaped for residence in a sinus or nasal cavity or passage, and in an unexpanded state has a cross-sectional diameter suitable for insertion into such cavity or passage.

5. A stent according to claim 1 wherein the stent comprises a radially expandable inner base stent and an outer sleeve surrounding and constraining at least a portion of the base stent.

22. A stent according to claim 5 wherein the sleeve has a smooth surface.

23. A stent according to claim 5 wherein the sleeve has a non-porous surface.

24. A stent according to claim 5 wherein the sleeve is elastic.

25. A stent according to claim 5 wherein the sleeve is nonwoven.

26. A stent according to claim 5 wherein the sleeve comprises a continuous film.

27. A stent according to claim 1 wherein the stent is radially compressible and radially resilient.

28. A stent according to claim 27 wherein the stent has a lower diameter and greater axial length when radially compressed than when the stent is expanded and unconstrained.

36. A stent according to claim 5 wherein the stent reduces the incidence of headaches in patients compared to a stent that does not include a sleeve.

42. A stent according to claim 1 wherein the stent comprises a drug loaded, radially expandable, biodegradable polymeric base stent surrounded and constrained by a cylindrical, biodegradable polymeric sleeve.

44. A stent according to claim 1 wherein the stent comprises a drug loaded, radially expandable, biodegradable polymeric spider-style base stent having a central hub and a plurality of legs, the legs being at least partially surrounded and constrained by a cylindrical, biodegradable polymeric sleeve.

2-4. -4. (canceled)

6-7. -7. (canceled)

8. A stent according to claim 0 wherein the base stent or sleeve comprise wire.

9. A stent according to claim 0 wherein the base stent comprises a wire hoop bent into a zig-zag configuration.

10. A stent according to claim 0 wherein the sleeve is fastened to the base stent.

11. A stent according to claim 0 wherein the sleeve is held in tension by the base stent after installation in a sinus or nasal cavity or passage.

12. A stent according to claim 0 wherein the sleeve is held in tension by the base stent both before and after installation in a sinus or nasal cavity or passage.

13-17. -17. (canceled)

18. A stent according to claim 0 wherein the base stent is drug-eluting.

19. A stent according to claim 0 wherein the sleeve is drug-eluting.

20. A stent according to claim 0 wherein the stent has a nonuniform cross-sectional diameter.

21. (canceled)

29-35. -35. (canceled)

37-41. -41. (canceled)

43. (canceled)