Actively Controllable Stent, Stent Graft, Heart Valve and Method of Controlling Same

• US 20130166017A1
• Filed: 02/20/2013
• Published: 06/27/2013
• Est. Priority Date: 07/31/2007
• Status: Active Grant

• Current Assignee: Edwards Lifesciences CardiAQ LLC (Edwards Lifesciences Corporation)
• Original Assignee: Syntheon Cardiology, LLC
• Inventors: Cartledge, Richard, Smith, Kevin W., Bales, Thomas O. Jr., Deville, Derek Dee, Kline, Korey, Mendez, Max Pierre, Palmer, Matthew A., Kirk, Michael Walter, Rivera, Carlos, McBrayer, Sean, Petersen, Eric
• Granted Patent: US 9,814,611 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/243 Deployment by mechanical expansion
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• 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 2/93 circumferentially expandable by using ratcheting locks
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0007 for adjusting length
• CPC Class Codes: A61F 2250/001 for adjusting a diameter
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0039 : differing in diameter
• CPC Class Codes: A61F 2250/006 : modular
• CPC Class Codes: A61F 2250/0065 : telescopic

Abstract

Sealable and repositionable implant devices are provided to increase the ability of endovascular grafts and valves to be precisely deployed or re-deployed, with better in situ accommodation to the local anatomy of the targeted recipient anatomic site, and with the ability for post-deployment adjustment to accommodate anatomic changes that might compromise the efficacy of the implant. A surgical implant includes a self-expanding stent of a shape-memory material set to a given shape. The stent has a wall with a portion having a first thickness and a second portion having a thickness greater than the first. The second portion defines a key-hole shaped longitudinal drive orifice. The implant includes a selectively adjustable assembly having adjustable elements and being operable to force a configuration change in at least a portion of the self-expanding stent. The adjustable elements have a part rotatably disposed within the longitudinal drive orifice.

Claims

1. A surgical implant, comprising:

a self-expanding stent of a shape-memory material set to a given shape, the self-expanding stent having a wall with at least one first portion having a first wall thickness and at least one second portion having a second wall thickness greater than the first wall thickness, the at least one second portion defining a key-hole shaped longitudinal drive orifice; and

a selectively adjustable assembly at the self-expanding stent, having adjustable elements, and being operable to force a configuration change in at least a portion of the self-expanding stent, the adjustable elements having a part rotatably disposed within the longitudinal drive orifice.

2. The surgical implant according to claim 1, wherein the key-hole shaped longitudinal drive orifice has an opening facing radially outwards.

3. The surgical implant according to claim 1, wherein the key-hole shaped longitudinal drive orifice has an opening facing radially inwards.

4. The surgical implant according to claim 1, wherein the wall is shaped substantially as a hollow cylinder.

5. The surgical implant according to claim 4, wherein the wall has alternating first and second portions, the first portions having a first radial wall thickness and the second portions having a second radial wall thickness greater than the first radial wall thickness.

6. The surgical implant according to claim 4, wherein the alternating first and second portions run the longitudinal extent of the stent.

7. The surgical implant according to claim 1, wherein the key-hole shaped longitudinal drive orifice is wire-EDM machined.

8. The surgical implant according to claim 1, wherein the stent has an exterior smooth circumferential surface.

9. The surgical implant according to claim 8, wherein the exterior smooth circumferential surface is created by extruding the stent.

10. The surgical implant according to claim 1, wherein the adjustable elements include a drive screw rotatably disposed in the longitudinal drive orifice.

11. A surgical implant, comprising:

a self-expanding stent of a shape-memory material set to a given shape, the self-expanding stent having a wall with a wall thickness defining a key-hole shaped longitudinal drive orifice; and

a selectively adjustable assembly at the self-expanding stent, having adjustable elements, and being operable to force a configuration change in at least a portion of the self-expanding stent, the adjustable elements having a part rotatably disposed within the longitudinal drive orifice.

12. A surgical implant, comprising:

a tubular stent of a shape-memory material, the stent having a wall defining an inner surface and an outer surface, one of the inner and outer surfaces having at least one radial projection extending therefrom.

13. The surgical implant according to claim 12, wherein:

the outer surface is an outer substantially circular circumferential surface; and

the inner surface has a non-circular circumference in a radial direction of the stent to create at least one locally thicker inwardly projecting section.

14. The surgical implant according to claim 12, wherein:

the inner surface is an inner substantially circular circumferential surface; and

the outer surface has a non-circular circumference in a radial direction of the stent to create at least one locally thicker outwardly projecting section.