STENT FOR MAINTAINING PATENCY OF A BODY REGION

• US 20080065209A1
• Filed: 12/30/2003
• Published: 03/13/2008
• Est. Priority Date: 12/30/2002
• Status: Active Grant

• Current Assignee: Queiscence Medical, Inc.
• Original Assignee: Queiscence Medical, Inc.
• Inventors: Pflueger, D. Russell
• Granted Patent: US 7,381,222 B2
• Time in Patent Office: Days
• US Class Current: 623/9
• CPC Class Codes: A61F 2/20 Epiglottis; Larynxes; Tracheae combined with larynxes or for use therewith tracheae, bronchi per se A61F2/04 ; tracheostomy tubes A61M16/0465
• CPC Class Codes: A61F 2/203 comprising an air passage from trachea to oesophagus or to pharynx; Artificial epiglottis
• CPC Class Codes: A61F 2/82 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; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 5/566 Intra-oral devices

Abstract

An apparatus and method for maintaining patency of a vessel or other body region is provided. The apparatus includes an appliance having a non-circumferential form and being effective in maintaining patency or openness, or causing to become patent or open, a body region in which the appliance is located. The appliance may be formed of a flexible metallic struts structured to be submucossally implanted into a wall of the vessel or other body region.

Claims

1. An apparatus for maintaining patency of a pharyngeal region of a human or animal body, the apparatus comprising:

an appliance comprising a body portion and end portions spaced apart by the body portion, the body portion and the end portions together define an interior open space,

the appliance being structured and sized to take on a deployed configuration when located within the pharyngeal region, such that (a) the interior space remains open, (b) the end portions are spaced apart from each other by other than the body portion, the end portions overlap each other, or the end portions directly contact each other, and (c) the appliance exerts a force on the pharyngeal region to maintain the region substantially open or unobstructed, or to cause the region to be maintained substantially open or unobstructed.

2. The apparatus of claim 1 wherein the appliance is structured to form a relatively flat configuration.

3. The apparatus of claim 1 wherein the appliance is configured and structured to be submucosally implanted into the pharyngeal region and defines a substantially flat configuration when in other than the deployed configuration.

4. The apparatus of claim 1 wherein the appliance comprises a super-elastic material.

5. The apparatus of claim 1 wherein the appliance comprises Nitinol.

6. The apparatus of claim 1 wherein the end portions are radiused.

7. The apparatus of claim 1 wherein the appliance has a length defined between the end portions, and the appliance comprises a plurality of struts extending along a substantial portion of the length.

8. The apparatus of claim 7 wherein said plurality of struts comprise a super-elastic material.

9. The apparatus of claim 7 wherein said plurality of struts comprise Nitinol.

10. The apparatus of claim 1 wherein the appliance comprises at least about 2 struts structured to be spaced apart from one another when implanted in the pharyngeal region.

11. The apparatus of claim 10 wherein the struts are sized and structured to be submucosally implanted in a vessel.

12. The apparatus of claim 11 wherein struts are sized and structured to be implanted in the vessel such that the struts are aligned along a longitudinal axis defined by the vessel.

18. The apparatus of claim 1 wherein the body portion and end portions are made of mesh construction.

21. The apparatus of claim 1, further comprising a needle for pulling the appliance into the mucosal layer of the vessel or other body region.

13. (canceled)

14. A method for maintaining patency of or for causing to become patent, open or unobstructed, a pharyngeal region of a human or an animal, the method comprising the steps of:

providing a flat or pre-curved member having a body portion and end portions spaced apart by the body portion, the body portion and the end portions together defining an interior open space;

pulling end portions of the flat or pre-curved member together to form a folded configuration;

holding or temporarily securing the end portions together;

placing the member, in the folded configuration, into a pharyngeal region to be treated; and

releasing the end portions from being held or secured together, thereby allowing the member to expand within the pharyngeal region so that the interior open space remains open.

15. The method of claim 14 wherein the expanded member within the pharyngeal region is effective to provide a substantially constant radial force against the walls or tissues of the pharyngeal region.

19. The method of claim 14 wherein the body portion and end portions are made of mesh construction.

16. A method for maintaining patency of or for causing to become patent, open or unobstructed, a pharyngeal region of a human or animal, the method comprising the steps of:

providing an elongated member having a desired stiffness and resiliency, the elongated member comprising a body portion and end portions spaced apart from the body portion, the body portion and the end portions together defining an interior open space; and

implanting the elongated member submucosally into walls of the pharyngeal region in alignment with a longitudinal axis so that the interior open space remains open.

17. The method of claim 16 further comprising the step of providing another said elongated member;

implanting the another said elongated member submucosally into the pharyngeal region in alignment with and spaced apart from the elongated member to provide support to the pharyngeal region.

20. The method of claim 16 wherein the body portion and end portions are made of mesh construction.

22. The apparatus of claim 16, wherein implanting the elongated member comprises pulling the elongate member into the mucosal layer with a needle.

23. A method for maintaining patency of or for causing to become patent, open or unobstructed, a pharyngeal region of a human or animal, the method comprising the steps of:

providing an elongated member having a desired stiffness and resiliency, the elongated member comprising a body portion and end portions spaced apart from the body portion, the body portion and the end portions together defining an interior open space;

introducing the elongated member into the pharyngeal region; and

pulling the elongated member into the mucosal layer with a needle to at least partially implant the elongated member submucosally into walls of the pharyngeal region.

24. The method of claim 23, wherein the elongated member is implanted substantially entirely submucosally into the walls of the pharyngeal region.

25. The method of claim 23, wherein introducing the elongated member comprises:

pulling end portions of the elongated member together to form a folded configuration;

placing the elongated member into the vessel in the folded configuration; and

releasing the elongated member within the vessel.