STENT PATTERN FOR POLYMERIC STENTS

• US 20110224778A1
• Filed: 05/20/2011
• Published: 09/15/2011
• Est. Priority Date: 05/30/2006
• Status: Abandoned Application

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Kleine, Klaus, Gale, David C., Huang, Bin, Limon, Timothy A., Abbate, Anthony J.
• Application Number:
  US13/112,960
• Publication Number:
  US 20110224778A1
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• 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 2002/821 Ostial stents
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• 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
• CPC Class Codes: B23K 26/384 of specially shaped holes
• CPC Class Codes: B23K 26/402 involving non-metallic material, e.g. isolators
• CPC Class Codes: B29C 2793/0009 Cutting out
• CPC Class Codes: B29C 48/0022 combined with cutting
• CPC Class Codes: B29C 48/022 characterised by the choice of material
• CPC Class Codes: B29C 48/09 Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• CPC Class Codes: B29C 55/00 Shaping by stretching, e.g. drawing through a die; Apparatus therefor B29C61/08 takes precedence
• CPC Class Codes: B29C 55/24 radial
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 66/534 Joining single elements to open ends of tubular or hollow articles or to the ends of bars
• CPC Class Codes: B29C 71/0063 for changing crystallisation
• CPC Class Codes: B29K 2995/0039 Amorphous
• CPC Class Codes: B29K 2995/006 : Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
• CPC Class Codes: B29L 2031/7534 : Cardiovascular protheses
• CPC Class Codes: Y10T 29/49874 : Prestressing rod, filament or strand
• CPC Class Codes: Y10T 29/49908 : Joining by deforming
• CPC Class Codes: Y10T 29/49913 : by constricting outer annulus
• CPC Class Codes: Y10T 29/49925 : Inward deformation of aperture or hollow body wall
• CPC Class Codes: Y10T 29/49927 : Hollow body is axially joined cup or tube
• CPC Class Codes: Y10T 29/49995 : Shaping one-piece blank by removing material

Abstract

A stent having a stent pattern including a plurality of cylindrical rings, each ring including a plurality of diamond-shaped cells having four curved elements defining apices of the diamond-shaped cells is disclosed herein.

Claims

1. A stent having a stent pattern comprising:

a plurality of cylindrical rings,

each ring including a plurality of diamond-shaped cells having four curved elements defining apices of the diamond-shaped cells,

wherein a first and a second bar arm forming a longitudinally aligned curved element of the four curved elements and a third and a fourth bar arm forming an opposing longitudinally aligned curved element of the four curved elements,

wherein the first and the third bar arm form a circumferentially aligned curved element of the four curved elements and the second and the fourth bar arms form an opposing circumferentially aligned curved element of the four curved elements; and

a plurality of linear bar arms parallel with a longitudinal axis of the stent connecting adjacent rings,

wherein at least one linear bar arm connects an intersection of two circumferentially adjacent diamond-shaped cells with an intersection of two circumferentially adjacent diamond-shaped cells on an adjacent ring.

2. The stent of claim 1, wherein a radius of curvature of the opposing longitudinally aligned curved elements is between 0.004 in and 0.006 in.

3. The stent of claim 1, wherein curved elements between circumferentially adjacent cells have a radius of curvature of between 0.0025 in and 0.004 in.

4. The stent of claim 1, wherein curved elements between linear bar arms and adjacent bar arms of the diamond-shaped cells have a radius of curvature of between 0.004 in and 0.006 in.

5. The stent of claim 1, wherein every other intersection is connected with a linear bar arm of the at least one linear bar arms.

6. The stent of claim 1, wherein the stent pattern has six diamond-shaped cells around its circumference.

7. The stent of claim 1, wherein a ratio of an outer circumference of the stent to the number of diamond-shaped cells around a circumference of the stent is 0.044 in/cell.

8. The stent of claim 1, wherein the stent is allowed to be crimped or expanded through flexing of bending elements.

9. The stent of claim 8, wherein the bending elements comprise the longitudinally aligned curved elements of the diamond-shaped cells between the first and second bar arms and the third and fourth bar arms.

10. The stent of claim 8, wherein the bending elements comprise curved elements between the first and second bar arms of cylindrically adjacent diamond-shaped cells.

11. The stent of claim 8, wherein the bending elements comprise curved elements between bar arms of the diamond-shaped cells and the linking bar arms.