Artificial trachea

• US 6,547,825 B1
• Filed: 04/03/2002
• Issued: 04/15/2003
• Est. Priority Date: 10/04/1999
• Status: Expired due to Fees

• Current Assignee: Tapic International Company Limited, Yasuhiko Shimizu
• Original Assignee: Tapic International Company Limited, Yasuhiko Shimizu
• Inventors: Shimizu, Yasuhiko, Nakamura, Tatsuo
• Primary Examiner(s): Isabella, David J.
• Application Number:
  US10/089,931
• Time in Patent Office: 377 Days
• Field of Search: 623/23.64, 623/23.65, 623/23.69, 623/23.7, 623/23.75, 623/23.72, 623/1.13, 623/1.122, 623/1.35, 623/1.44, 623/1.46, 623/1.45, 623/1.47, 623/1.49, 623/1.5, 623/1.51
• US Class Current: 623/23.64
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2002/046 Tracheae
• CPC Class Codes: A61L 2430/22 for reconstruction of hollow organs, e.g. bladder, esophagus, urether, uterus
• CPC Class Codes: A61L 27/16 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/24 Collagen
• CPC Class Codes: A61L 27/40 Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 89/06 derived from leather or skin , e.g. gelatin

Abstract

The present invention has an object to provide an artificial trachea that is able to be used safely in the clinical application, and especially an artificial trachea for the intrathoracic trachea, and the artificial trachea comprises a polypropylene mesh tube for the base material, around the outer periphery of which a polypropylene filamentous stent is wound in a spiral shape, an amorphous collagen thin layer formed on the surface of the base material, and a fine fibrous collagen layer (20) formed on the inner and outer surface of the amorphous collagen thin layer, to which thermal dehydration crosslinking is performed.

Claims

1. An implantable artificial trachea comprising a polypropylene mesh tube having inner and outer surfaces, said tube having a polypropylene filamentous stent spirally wound on said outer surface, a thin layer of amorphous collagen formed on the mesh tube and stent, and a fine fibrous collagen layer formed on the inner and outer surfaces of said thin layer of amorphous collagen, wherein the collagen is subjected to thermal dehydration crosslinking.

2. The artificial trachea according to claim 1, wherein the artificial trachea is used as a substitute for an intrathoracic trachea.

3. The artificial trachea according to claim 1, wherein the artificial trachea is used as a substitute for a trachea bifurcation.