Stents with radiopaque markers

• US 9,532,888 B2
• Filed: 12/31/2014
• Issued: 01/03/2017
• Est. Priority Date: 01/04/2006
• Status: Active Grant

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated), Advanced Cardiovascular Systems Incorporated
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Dugan, Stephen R., Abbate, Anthony J.
• Primary Examiner(s): STEWART, JASON-DENNIS NEILKEN
• Application Number:
  US14/588,286
• Publication Number:
  US 20150148891A1
• Time in Patent Office: 734 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• 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 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91566 connected trough to trough
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2250/0029 differing in bending or flexure capacity
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: A61L 31/18 Materials at least partially X-ray or laser opaque

Abstract

Various embodiments of stents with radiopaque markers disposed within depots in the stent, are described herein.

Claims

1. A bioabsorbable stent comprising:

an undeformed cylindrical radiopaque marker disposed in a cylindrical depot in a portion of the stent, wherein the marker comprises a sufficient radiopacity to be imaged by an imaging technique, wherein

the cylindrical radiopaque marker remains undeformed after being coupled to the stent,

at least some gaps between the undeformed cylindrical radiopaque marker and an internal surface of the cylindrical depot include a polymeric material,

the depot extends partially through the portion of the stent such that only one of a luminal side and an abluminal side of the depot is open, and

the bioabsorbable stent is fabricated from a polymer including poly(L-lactide-co-caprolactone) and the marker is a mixture or alloy of at least two types of metals for allowing the marker to be imaged by the imaging technique.