Insert for a conduit

• US 7,331,989 B2
• Filed: 11/21/2002
• Issued: 02/19/2008
• Est. Priority Date: 11/21/2001
• Status: Expired due to Term

• Current Assignee: Tayside Flow Technologies, Ltd.
• Original Assignee: Tayside Flow Technologies, Ltd.
• Inventors: Hood, Robert Gordon, Sarran, Christophe Emmanuel, Stonebridge, Peter Arno, Johnstone, Allana, Duff, Craig McLeod, Houston, John Graeme, Dick, John Bruce Cameron
• Primary Examiner(s): Nguyen; Anhtuan T.
• Assistant Examiner(s): Houston; Elizabeth
• Application Number:
  US10/301,257
• Publication Number:
  US 20030139807A1
• Time in Patent Office: 1,916 Days
• Field of Search: 623/1.22, 623/1.32, 623/1.33, 623/1.1, 623/1.15, 623/23.7, 623/900, 138/39, 138/129, 138/112, 138/172, 606/108, 604/8
• US Class Current: 623/1.22
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• 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 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2250/0013 for adjusting fluid pressure
• CPC Class Codes: F15D 1/04 Arrangements of guide vanes in pipe elbows or duct bends; Construction of pipe conduit elements for elbows with respect to flow, e.g. for reducing losses of flow

Abstract

There is disclosed an insert (2) for a conduit (4) adapted to effect helical flow in the conduit (4) comprising a longitudinally extending member having a helical formation.

Claims

1. A stent comprising a tubular body section defining an inside surface of the stent and an insert mounted on the inside surface, the insert comprising a longitudinally extending member defining a partial helix that extends the entire longitudinal length of the longitudinally extending member, the partial helix consisting of at least 50% of one revolution but less than one revolution and wherein the longitudinally extending member comprises at least two connected inwardly extending portions along its length.

2. A stent according to claim 1, wherein the inwardly extending portion extends inwardly away from the internal side-walls of the tubular body section.

3. A stent according to claim 2, wherein the inwardly extending portion portions are movable between the extended position and a collapsed position.

4. A stent according to claim 3, wherein the longitudinally extending member comprises an elastically compressible material.

5. A stent according to claim 1, wherein the portion of the helix is at least 70% of one revolution.

6. A stent according to claim 1, wherein the insert is mounted within a flexible tubular material and the flexible tubular material is mounted on the body section.

7. A stent comprising a tubular body section defining an inside surface of the stent and an insert mounted on the inside surface, the insert comprising a longitudinally extending member forming a partial helix, the partial helix extending the entire longitudinal length of the longitudinally extending member and being at least 50% of one revolution and less than one revolution and wherein the longitudinally extending member comprises, in cross-section, at least two fins extending inwardly from a base portion.