Locking stent

• US 5,868,781 A
• Filed: 10/22/1996
• Issued: 02/09/1999
• Est. Priority Date: 10/22/1996
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Killion, Douglas P.
• Primary Examiner(s): LEWIS, WILLIAM W
• Application Number:
  US08/735,160
• Time in Patent Office: 840 Days
• Field of Search: 606/1, 606/108, 606/191, 606/194, 606/198, 606/200, 604/96, 623/1, 623/12
• US Class Current: 623/1.15
• 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 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Abstract

A stent is provided which may be mechanically locked in an expanded diameter. The stent may have several locked diameters or may be locked at different diameters along the axial length of the stent.

Claims

1. A tubular prosthesis comprising:

a cylindrical body having a first diameter and a compressive strength; and

moveable arms integrally formed with the cylindrical body, wherein the moveable arms move from an unlocked position to a locked position when the cylindrical body is expanded from the first diameter to a second diameter, the locked position formed when the arms lockingly engage the body and thereby change the compressive strength of the cylindrical body.

2. The tubular prosthesis of claim 1 having at least two compressive strengths.

3. The tubular prosthesis of claim 1 having an axial length, wherein the moveable arms may be positioned such that the compressive strength varies along the axial length of the tubular prosthesis.