Reducing stent, device with reducing stent and use of a reducing stent

• US 5,618,301 A
• Filed: 01/19/1996
• Issued: 04/08/1997
• Est. Priority Date: 10/07/1993
• Status: Expired due to Fees

• Current Assignee: Angiomed GmbH & Co. Medizintechnik KG
• Original Assignee: Angiomed AG (Becton, Dickinson & Co)
• Inventors: Hauenstein, Hans K., Lindenberg, Josef
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): MULCARE, NANCY C
• Application Number:
  US08/588,688
• Time in Patent Office: 445 Days
• Field of Search: 606/198, 606/196, 606/194, 604/96, 604/97, 604/104, 604/132, 604/891.1
• US Class Current: 623/1.12
• CPC Class Codes: A61B 17/12036 partial occlusion
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12177 comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/3011 Cross-sections or two-dimensional shapes
• CPC Class Codes: A61F 2002/30327 differing in diameter
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2210/0019 operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
• CPC Class Codes: A61F 2230/0002 Two-dimensional shapes, e.g. cross-sections
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 2210/1071 Liver; Hepar

Abstract

A stent for reducing a diameter of a duct in a body of a living creature. The stent includes a sleevelike part having walls provided with perforations, enlarged ends as well as an intermediate area reduced in diameter by a constriction. Thrombogenic threads are provided on an exterior of the sleevelike part between the enlarged ends.

Claims

1. A reducing stent for reducing a diameter of a transjugular intrahepatic portosystemic shunt, the reducing stent comprising a sleevelike part extending along a longitudinal axis of said reducing stent and having a wall provided with perforations, first and second free ends at opposite ends of the sleevelike part along said longitudinal axis, an intermediate portion connecting said first and second free ends, and thrombogenic threads extending substantially parallel to said longitudinal axis of the reducing stent on the exterior of the sleevelike part along said intermediate portion, wherein at body temperature, the operating position of said reducing stent said first and second free ends of said sleevelike part each have a larger diameter than all areas of said intermediate portion, whereby said intermediate portion forms a constriction in said sleevelike part between said first and second free ends.

2. A reducing stent according to claim 1, wherein the sleevelike part automatically expands to said operating position at increased temperature corresponding to body temperature.

3. A reducing stent according to claim 2, wherein the sleevelike part consists of a nickel-titanium alloy.

4. A reducing stent according to claim 1, wherein the perforations in said wall of the sleevelike part form a lattice configuration.