Slide-and-lock stent

• US 20070032854A1
• Filed: 06/20/2006
• Published: 02/08/2007
• Est. Priority Date: 12/17/2004
• Status: Active Grant

• Current Assignee: REVA Medical Inc.
• Original Assignee: REVA Medical Inc.
• Inventors: Nguyen, John, Morris, Andrew, Schmid, Eric
• Granted Patent: US 8,277,500 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2/93 circumferentially expandable by using ratcheting locks
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing

Abstract

The invention relates to an expandable stent comprising circumferentially adjacent modules. The modules comprise longitudinally adjacent slide-and-lock radial elements which permit one-way sliding of the radial elements from a collapsed diameter to an expanded/deployed diameter, but inhibit radial recoil from the expanded diameter.

Claims

1. A slide-and-lock stent, comprising a tubular member having longitudinal and circumferential axes, said tubular member comprising:

a first radial element comprising an elongate rail comprising a deflectable tooth; and

a second radial element, circumferentially adjacent to the first radial element, and comprising an engagement means configured to slidably engage said elongate rail of the first radial element and deflect said deflectable tooth as the tooth contacts said engagement means, said engagement means being sized and configured with said elongate rail being passable therethrough, such that said tubular member achieves expansion in the circumferential axis with reduced recoil.

2. The slide-and-lock stent of claim 1 wherein said engagement means comprises a closed loop which defines a slot.

3. The slide-and-lock stent of claim 1, wherein said elongate rail defines upper and lower portions and a first thickness, said upper portion tapering from said first thickness to a second thickness along said circumferential axis approaching a distal edge of said upper portion, said second thickness being approximately one-half of said first thickness.

4. The slide-and-lock stent of claim 2, wherein said lower portion tapers from said first thickness to a second thickness along said circumferential axis approaching a distal edge of said lower portion, said second thickness being approximately one-half of said first thickness.

5. The slide-and-lock stent of claim 1, wherein said engagement means tapers along said circumferential axis to a second thickness approaching a distal edge of said engagement means, said second thickness being approximately one-half of said first thickness.

6. The slide-and-lock stent of claim 5, wherein said engagement means tapers from a combined thickness of approximately 1½

of a first thickness.

7. The slide-and-lock stent of claim 2, wherein said closed loop tapers along said circumferential axis to a second thickness approaching a distal edge of said engagement means, said second thickness being approximately one-half of said first thickness.

8. The slide-and-lock stent of claim 7, wherein said closed loop tapers from a combined thickness of approximately 1½

of a first thickness.

9. A slide-and-lock stent, comprising a tubular member having longitudinal and circumferential axes, said tubular member comprising:

a first radial element comprising an elongate rail comprising a plurality of deflectable teeth, said elongate rail further comprising two rail members with a gap being disposed therebetween; and

a second radial element, circumferentially adjacent to the first radial element, and comprising an engagement means configured to slidably engage said elongate rail of the first radial element and deflect said deflectable tooth as the tooth contacts said engagement means, said engagement means comprising a closed loop which defines a slot, said slot being sized and configured with said elongate rail being passable therethrough with said rail members said elongate rail deflecting toward one another into the gap when engaged by said slot, such that said tubular member achieves expansion in the circumferential axis with reduced recoil;

wherein said elongate rail defines upper and lower portions and a first thickness, said upper portion tapering from said first thickness to a second thickness along said circumferential axis approaching a distal edge of said upper portion, said lower portion tapers from said first thickness to said second thickness along said circumferential axis approaching a distal edge of said lower portion; and

wherein said closed loop tapers along said circumferential axis to said second thickness approaching a distal edge of said engagement means, said second thickness being approximately one-half of said first thickness.