Prosthesis for bodily canal

• US 5,514,178 A
• Filed: 05/27/1994
• Issued: 05/07/1996
• Est. Priority Date: 06/24/1993
• Status: Expired due to Term

• Current Assignee: Coloplast A/S
• Original Assignee: Synthelabo (Paris Cedex, FR) (Sanofi )
• Inventors: Torchio, Gerard
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): FOSSUM, LAURA J
• Application Number:
  US08/250,577
• Time in Patent Office: 711 Days
• Field of Search: 623/1, 623/11, 623/12, 606/153, 606/191, 606/198, 600/30, 600/37, 604/8
• US Class Current: 623/23.69
• 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 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2002/30199 Three-dimensional shapes
• CPC Class Codes: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2230/0063 Three-dimensional shapes
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

A prothesis intended to be introduced into a bodily canal which includes a flexible tube for preserving the normal passage cross section of the bodily canal and a holding device for immobilizing the flexible tube in position in the canal. The holding device is a tubular structure and is radially deformable so that it can pass from a first state in which its cross section is at most equal to that of the bodily canal into which it is to be introduced to a second state in which its cross section is such that the holding device bears on the wall of an orifice of the bodily canal emerging in a natural cavity. The holding device is linked at a distance to the flexible tube.

Claims

1. A prosthesis intended to be introduced into a bodily canal having a passage cross section, said prosthesis comprising:

a flexible tube intended to preserve said passage cross section of the bodily canal,

a holding device intended to immobilize said tube in position in said canal,

said holding device being connected to one end of said tube by linkage means, while being arranged at a distance from said end,

said holding device being radially deformable and being able to pass from a first cross section which is at most equal to said passage cross section, to a second cross section which is such that said holding device bears on a wall of an orifice of the bodily canal emerging in a natural cavity, and

said holding device being a tubular helical spring made of turns at least substantially contiguous, said tubular helical spring having a length of several millimeters, said helical spring having a cross section of oblong shape, a short dimension of the oblong cross section of the said tubular helical spring being at most equal to said passage cross section, and a long dimension of the oblong cross section of said tubular helical spring being greater than the said passage cross section.

2. The prosthesis as claimed in claim 1, wherein the oblong cross section of said spring is constant over its entire length.

3. The prosthesis as claimed in claim 1, wherein the long dimension of the oblong spring increases progressively from an end closest to the flexible tube to an end farthest from the flexible tube.

4. The prosthesis as claimed in claim 1, wherein said spring is made from metal wire of medical quality.