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Flexible stent

  • US 9,592,137 B2
  • Filed: 06/13/2014
  • Issued: 03/14/2017
  • Est. Priority Date: 04/04/2005
  • Status: Active Grant
First Claim
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1. A flexible stent comprising:

  • a helical portion comprising a plurality of side-by-side, individual helical elements helically wound about an axis of said stent, said helical portion being expandable radially upon deployment and compressible, expandable and bendable in a deployed state; and

    a strut portion on either side of said helical portion, each of said strut portions comprising axially aligned strut elements having a first end connected to said helical elements of said helical portion, said strut portions being radially expandable upon deployment, further comprising one or more additional said helical portions and one or more additional said strut portions wherein one of said one or more additional said helical portions is connected to a second end of one of said strut portions, said one or more additional said helical portions being connected respectively to said one or more additional said strut portions such that each of said helical portions is interposed between a pair of said strut portions,wherein said strut portions and/or said helical portions can have a varied axial length over a length of said stent;

    wherein said strut elements of said strut portion have a wave pattern of individual wave portions, each individual wave portion having a peak and each of said helical elements is connected to a respective one of said peaks on one side of said side strut elements and some of said helical elements are connected to some of said peaks on the other side of said side strut elements, and every other one of said peaks of said strut elements are connected by a respective one of said helical elements;

    wherein one of said helical portions has a higher ratio of a sum of gap lengths to a length of the helical portion than a second one of said helical portions; and

    wherein one of said strut portions has less strut elements than a second of said strut portions, said one of said strut portions has half as many strut elements as the second of said strut portions.

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