Polymeric stent patterns

• US 7,291,166 B2
• Filed: 05/18/2005
• Issued: 11/06/2007
• Est. Priority Date: 05/18/2005
• Status: Expired due to Fees

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Cheng, E. Tina, Chang, Rosabel
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US11/132,758
• Publication Number:
  US 20060265048A1
• Time in Patent Office: 902 Days
• Field of Search: 623 111- 122
• US Class Current: 623/1.15
• 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

Patterns for polymeric radially expandable implantable medical devices such as stents for implantation into a bodily lumen are disclosed. Some patterns comprise radially expandable cylindrical rings that are longitudinally aligned, each ring comprising diamond-shaped elements, each formed by four linear bar arms. The patterns con also comprise a cross-like element comprising four linear bar arms interconnected within the diamond-shaped elements, and at least one link between adjacent rings. In other patterns, the rings comprise peaks and valleys formed by linear bar arms. wherein pairs of rings are configured such that the peaks of one pair are connected to the valleys of the other pair at apices of the peaks and valleys to form diamond shaped regions. In yet other patterns, there are two v-shaped elements formed by two short bar arms within the diamond-shaped elements, and a connecting bar arm connecting the two v-shaped elements.

Claims

1. A radially expandable intravascular stent for implanting in a bodily lumen, comprising:

a plurality of radially expandable cylindrical rings that are longitudinally aligned, each ring comprising;

a first delivery diameter and a second implanted diameter; and

a plurality of diamond-shaped elements formed by four linear bar arms, wherein adjacent elements on the ring are connected at apices of the adjacent elements,

a cross-like element comprising four linear bar arms interconnected within at least one diamond-shaped element, wherein one end of each bar arm of the cross-like element is connected to one of the bar arms of the at least one diamond-shaped element between two adjacent apices of the at least one diamond-shaped element; and

at least one link between adjacent rings, wherein the at least one link connects longitudinal apices of adjacent diamond-shaped elements of adjacent rings.

2. The stent of claim 1, wherein the stent comprises a biostable polymer and/or a bioabsorbable polymer.

3. The stent of claim 1, wherein the at least one link between adjacent rings comprise a connection at the longitudinal apices of the adjacent diamond-shaped elements.

4. The stent of claim 1, wherein the at least one link between adjacent rings comprise a linear bar arm.

5. The stent of claim 1, wherein at least one of the bar arms of a cross-like element is configured to plastically deform along a longitudinal axis of the bar arm when the stent expands.

6. The stent of claim 1, wherein at least one of the bar arms of the diamond-shaped element is longer than the bar arms of the cross-like element.

7. The stent of claim 1, wherein a width of at least one of the bar arms of the diamond-shaped element is larger than the bar arms of the cross-like element.

8. The stent of claim 1, wherein at least one of the bar arms of the cross-like element comprise a different polymeric material than the bar arms of the diamond-shaped element.

9. The stent of claim 1, wherein at least one of the bar arms of the cross-like element comprise a higher modulus material than the bar arms of the diamond-shaped regions.

10. The stent of claim 1, wherein at least one of the bar arms of the cross-like element comprise a lower modulus material than the bar arms of the diamond-shaped elements.

11. A radially expandable intravascular stent for implanting in a bodily lumen, comprising:

a plurality of pairs of radially expandable undulating cylindrical rings that are longitudinally aligned comprising peaks and valleys formed by linear bar arms, wherein the pairs of rings are configured such that the peaks of one pair are connected to the valleys of the other pair at apices of the peaks and valleys to form a plurality of diamond shaped regions;

at least one link between adjacent rings, wherein the at least one link connects a peak on one ring to an adjacent valley on an adjacent ring; and

a cross-like element comprising four linear bar arms interconnected within at least one diamond-shaped element, wherein one end of each bar arm of the cross-like element is connected to one of the linear bar arms of the rings between a peak and a valley of the ring and another end of each bar arm interconnected to ends of the bar arms of the cross-like element.

12. The stent of claim 11, wherein the stent comprises a biostable polymer and/or a bioabsorbable polymer.

13. The stent of claim 11, wherein the at least one link between adjacent rings comprise a connection of the peak on one ring to the adjacent valley at the apices of the peak and the adjacent valley.

14. The stent of claim 11, wherein the at least one link between adjacent rings comprise a linear bar arm.

15. The stent of claim 11, wherein at least one of the bar arms of a cross-like element are configured to plastically deform along a longitudinal axis of the bar arm when the stent expands.

16. The stent of claim 11, wherein at least one of the bar arms of the pairs of cylindrical rings are longer than the bar arms of the cross-like element.

17. The stent of claim 11, wherein a width of each of at least one of the bar arms of the pairs of cylindrical rings is larger than the bar arms of the cross-like element.

18. A radially expandable intravascular stent for implanting in a bodiy lumen, comprising:

a plurality of radially expandable cylindrical rings that are longitudinally aligned, each ring comprising;

a first delivery diameter and a second implanted diameter; and

a plurality of diamond-shaped elements formed by four linear bar arms, wherein adjacent elements on the ring are connected at apices of the adjacent elements;

at least one link between adjacent rings, wherein the at least one link connects longitudinal apices of adjacent diamond-shaped elements of adjacent rings;

two v-shaped elements formed by two short bar arms within at least one diamond-shaped element, ends of the short bar arms of one v-shaped element are connected to bar arms of the diamond-shaped element on either side of one longitudinal apex of the diamond-shaped element, and ends the short bar arms of a second v-shaped element are connected to bar arms of the diamond-shaped element on either side of a second longitudinal apex of the diamond-shaped element; and

a connecting bar arm within at least one diamond-shaped element connecting the apices of the two v-shaped elements.

19. A radially expandable intravascular stent for implanting in a bodily lumen, comprising:

a plurality of pairs of radially expandable undulating cylindrical rings that are longitudinally aligned comprising peaks and valleys formed by linear bar arms, wherein the pairs of rings are configured such that the peaks of one pair are connected to the valleys of the other pair at apices of the peaks and valleys to form a plurality of diamond shaped regions;

at least one link between adjacent rings, wherein the at least one link connects a peak on one ring to an adjacent valley on an adjacent ring;

two v-shaped elements formed by two short bar arms within at least one diamond-shaped element, ends of the short bar arms of one v-shaped element are connected to bar arms of the diamond-shaped element on either side of one longitudinal apex of the diamond-shaped element, and ends the short bar arms of a second v-shaped element are connected to bar arms of the diamond-shaped element on either side of a second longitudinal apex of the diamond-shaped element; and

a connecting bar arm within at least one diamond-shaped element connecting the apices of the two v-shaped elements.

20. A radially expandable intravascular stent for implanting in a bodily lumen, comprising:

a plurality of radially expandable cylindrical rings that are longitudinally aligned, each ring comprising;

a first delivery diameter and a second implanted diameter; and

a plurality of diamond-shaped elements formed by four linear bar arms, wherein adjacent elements on the ring are connected at apices of the adjacent elements;

two connecting elements within at least one diamond-shaped element with each element having two ends, the ends of one connecting element are connected to bar arms of the diamond-shaped element on either side of one longitudinal apex of the diamond-shaped element, and the ends of a second connecting element are connected to bar arms of the diamond-shaped element on either side of a second longitudinal apex of the diamond-shaped element;

a connecting bar arm within at least one diamond-shaped element connecting the two connecting elements; and

at least one link between adjacent rings, wherein the at least one link connects longitudinal apices of adjacent diamond-shaped elements of adjacent rings.

21. The stent of claim 20, wherein the first connecting element comprises a first v-shaped bar arm, the ends of the first v-shaped bar arm are connected to bar arms of the diamond-shaped element on either side of one longitudinal apex of the diamond-shaped element, and wherein the second connecting element comprises a second v-shaped bar arm, the ends of the second v-shaped bar arm are connected to bar arms of the diamond-shaped element on either side of a second longitudinal apex of the diamond-shaped element.