Means for Controlled Sealing of Endovascular Devices

• US 20130197622A1
• Filed: 05/21/2012
• Published: 08/01/2013
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: Endoluminal Sciences Pty Ltd
• Original Assignee: Endoluminal Sciences Pty Ltd
• Inventors: Mitra, Ashish Sudhir, Bobillier, Ben Colin, Ng, Martin Kean Chong, Wong, Pak Man Victor
• Granted Patent: US 9,216,076 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/077 having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve
• CPC Class Codes: A61F 2210/0061 swellable
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2250/0069 Sealing means
• CPC Class Codes: A61L 31/048 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/145 Hydrogels or hydrocolloids
• CPC Class Codes: A61L 31/16 Biologically active materials, e.g. therapeutic substances A61L31/047 takes precedence
• CPC Class Codes: C08L 33/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: C08L 71/02 Polyalkylene oxides

Abstract

Expandable sealing means for endoluminal devices have been developed for controlled activation. The devices have the benefits of a low profile mechanism (for both self-expanding and balloon-expanding prostheses), contained, not open, release of the material, active conformation to the “leak sites” such that leakage areas are filled without disrupting the physical and functional integrity of the prosthesis, and on-demand, controlled activation, that may not be pressure activated.

Claims

1. An endoluminal seal for sealing an endoluminal implant or prosthesis to a wall of a lumen of a subject, the endoluminal seal comprising:

An expandable material selected from the group consisting of hydrogels and foams,

A first membrane adjacent to and containing the expandable material;

Wherein the expandable material is activated by exposure to a fluid or a foaming agent.

2. The endoluminal seal of claim 1 further comprising a second impermeable membrane, metal foil or laminate preventing fluid or foaming agent from penetrating the semi-permeable membrane to contact the expandable material prior to activation.

3. The endoluminal seal of claim 2 wherein the second impermeable membrane comprises a rupture site and activation means for rupturing the impermeable membrane to allow fluid or foaming agent to penetrate the semi-permeable membrane and contact the expandable material to expand the seal.

4. The endoluminal seal of claim 1 that is positioned within or is close abutment to the exterior of the implant or prosthesis, not changing the profile from that of the implant or prosthesis during implantation.

5. The endoluminal seal of claim 1 that expands under sufficient low pressure so that it seals the space between the implant or prosthesis and luminal wall, but does not push the implant or prosthesis away from the lumen wall.

6. The endoluminal seal of claim 1 wherein the seal actively conforms to a leak site between the lumen wall and the implant or prosthesis, without altering the rest of the device configuration.

7. The endoluminal seal of claim 1 wherein the first membrane has a pore size in the range of 50-70 microns.

8. The endoluminal seal of claim 1 wherein the expandable material is a hydrogel and the first membrane is permeable to fluid.

9. The endoluminal seal of claim 8 comprising a material selected from the group consisting of polyacrylic acids and polyalkylene oxides.

10. The endoluminal seal of claim 1 comprising a support member which interfaces between the seal and the endoluminal implant or prosthesis and can go from an unexpanded or crimped state to an expanded state.

11. The endoluminal seal of claim 10 wherein the support member is an expandable mesh or struts, optionally including means for securing the implant or prosthesis at the site of implantation.

12. The endoluminal seal of claim 10 wherein the seal is crimped distal or proximal to the prosthesis, and aligned with the prosthesis prior to or at the time of placement.

13. The endoluminal seal of claim 3 wherein the activation means is a wire connected to the rupture site that can be attached to the implant or prosthesis or aligned with a catheter element for placement of the implant or prosthetic.

14. The endoluminal seal of claim 2 wherein the activation means is an expansion means that increases pressure within the seal to rupture the impermeable membrane.

15. The endoluminal seal of claim 1 further comprising a pharmaceutical, therapeutic or diagnostic agent to be released.

16. The endoluminal seal of claim 1 further comprising an adhesive which is released when the rupture site is ruptured.

17. The endoluminal seal of claim 1 having a circumference complementary to a portion of the endoluminal implant or prosthesis, wherein the seal is in abutment to and substantially the same or less than the diameter of the endoluminal implant or prosthesis, prior to expansion of the seal

23. A method of sealing a lumen comprising implanting an endoluminal implant or prosthetic comprising one or more of the endoluminal seal of claim 1 affixed thereto into a wall of a lumen of a subject.

24. The method of claim 23 comprising activating the rupture site of the endoluminal seal.

25. The method of claim 23 wherein the rupture site is activated by withdrawal of a wire attached thereto.

26. The method of claim 23 comprising attaching the endoluminal seal to a stent or valve prosthesis to form a sealable endoluminal device and inserting the endoluminal device into an insertional catheter with a guidewire.

27. The method of claim 23 further comprising releasing a therapeutic, prophylactic or diagnostic agent or adhesive at the site of sealing.

28. The method for implanting an endoluminal seal for sealing an endoluminal implant or prosthesis to a wall of a lumen of a subject of claim 23, the endoluminal seal comprising:

An expandable material,

A first semi-permeable membrane adjacent to and containing the expandable material;

A removable impermeable membrane preventing fluid from reaching the impermeable membrane when the seal is stored in an aqueous environment,

wherein the second impermeable membrane is removable by peeling, cracking, melting, or vaporization.

29. The seal of claim 28 wherein the second impermeable membrane is applied with plasma vapour deposition, vacuum deposition, co-extrusion, or press lamination.

18. An endoluminal seal for sealing of an endoluminal implant or prosthesis delivered in an introducer catheter or sheath, comprising an endoluminal implant or prosthesis and seal, wherein the seal is aligned with the endoluminal implant or prosthesis by expansion of the seal or the endoluminal implant or prosthesis.

19. An endoluminal seal for sealing of an endoluminal implant or prosthesis delivered in an introducer catheter or sheath, comprising an endoluminal implant or prosthesis and seal, wherein the seal is aligned with the region of the endoluminal implant or prosthesis to be sealed prior to expansion of the endoluminal implant or prosthesis by use of an activation member.

20. An endoluminal seal for sealing of an endoluminal implant or prosthesis delivered in an introducer catheter, comprising an endoluminal implant or prosthesis and seal, wherein the seal is crimped distal or proximal to the endoluminal implant or prosthesis, and aligns with a portion of the endoluminal implant or prosthesis when it is removed from the introducer catheter or sheath.

21. An endoluminal seal for sealing of endoluminal implant or prosthesis, comprising fixation members attaching the seal to a distal or proximal portion of the endoluminal implant or prosthesis, for delivery in an introducer catheter or sheath, wherein the fixation members pull the seal into abutment with a portion of the endoluminal implant or prosthesis when it is removed from the introducer catheter or sheath.

22. An endoluminal seal for sealing of endoluminal implant or prosthesis, comprising release members attaching the seal to a distal or proximal portion of the endoluminal implant or prosthesis, for recapture of the implant or prosthesis in an introducer catheter or sheath after complete or partial expansion, wherein the release members engage or disengage to enable the seal to be pulled into an introducer catheter or sheath.