Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure
Reexamination Certificate
2008-03-20
2011-11-08
Hughes, S. Thomas (Department: 3731)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Stent structure
Reexamination Certificate
active
08052738
ABSTRACT:
A stent made up of at least two connected bands, each band having a pattern of undulations formed from long, short and mid-sized segments connected together by turns. In particular, the pattern includes a repeating series having five segments: a long segment, a short segment, a mid-sized segment, a mid-sized segment, a short segment (LSMMS). When adjacent bands are connected together to form the stent body, the LSMMS segment configuration forms a series of consecutive tapered gaps between the consecutive unconnected close ended turns of adjacent bands which provide greater flexibility for the stent. The series of consecutive tapered gaps allow the stent to flex with little or no interference with adjacent bands when the stent is tracked around a small radius bend in a vessel. In addition, the length of the longest rigid element of the stent is decreased to further improve flexibility. A rigid element is formed by the lengths of the segments on both sides of a connection between adjacent bands. By decreasing the length of this rigid element, the length which must be tracked around the bends of a vessel is shortened and thus the stent is easier to advance.
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Hughes S. Thomas
Medtronic Vascular Inc.
Shi Katherine M
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