Stent having radiopaque markers and method of fabricating the same

• US 7,291,167 B2
• Filed: 12/17/2002
• Issued: 11/06/2007
• Est. Priority Date: 10/26/2000
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: DiCaprio, Fernando
• Primary Examiner(s): Matthews; William H.
• Application Number:
  US10/321,989
• Publication Number:
  US 20030121148A1
• Time in Patent Office: 1,785 Days
• Field of Search: 623/1.34, 623/1.44, 623/1.45, 623/1.46, 623/900, 427/2.24, 427/2.25, 427/2.3, 428/374
• US Class Current: 623/1.34
• 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 2/91 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 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• 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 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0032 differing in radiographic density
• CPC Class Codes: Y10S 623/90 Stent for heart valve
• CPC Class Codes: Y10T 29/494 Fluidic or fluid actuated device making

Abstract

The present invention relates to an intraluminal medical device formed of a first base material and having a second material inlaid in the base material wherein at least one of said first material and said second material is more radiopaque than the other. The second material may be inlaid in the first either by swaging, rolling, or by coextruding the two materials. The second radiopaque material forms a substantially smooth surface with the first base material.

Claims

1. A method of forming an intraluminal medical device having radiopacity comprising the steps of:

a) coextruding a stent preform said preform being comprised of a first metallic base material and a second metallic material wherein one of said first material and said second material is more radiopaque than the other, said second material being located at specified periodic intervals in said base material and said second material forming a substantially smooth surface with said first base material in said stent preform;

b) forming a strut pattern in said stent preform.

2. The method of claim 1 wherein said second material is more radiopaque than said first material.

3. The method of claim 1 wherein said stent preform is coextruded in the form of a sheet or a tube.