Bifurcated endovascular stent and methods for forming and placing
First Claim
1. A method for forming a bifurcated stent for placement in a body lumen having a common portion and two branches communicating with the common portion comprising:
- providing a first tube-defining member open at each end and having a transverse opening formed between its ends, the tube-defining member being expandable radially from a low profile to an expanded configuration;
providing a second tube-defining member having openings at least at its ends, the second tube-defining member being expandable from a low profile configuration to an expanded configuration;
advancing the second tube into the first tube and through the transverse opening thereby to define a bifurcated configuration; and
expanding the second tube from its low profile to an expanded configuration.
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Accused Products
Abstract
A bifurcated endovascular stent is formed by a pair of tube-defining members, one of which is open at its ends and has a lateral opening between its ends. The other tubular structure is adapted to be advanced into one end of the first tube and exit through the lateral opening. The tube-defining members are formed in modular construction, each including an elongate spine and a plurality of generally tube defining modules attached to the spine in a longitudinally sequenced array. The modular construction enables a wide range of variations in the characteristics of the stent, including longitudinal flexibility, radial expansion among others.
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Citations
39 Claims
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1. A method for forming a bifurcated stent for placement in a body lumen having a common portion and two branches communicating with the common portion comprising:
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providing a first tube-defining member open at each end and having a transverse opening formed between its ends, the tube-defining member being expandable radially from a low profile to an expanded configuration; providing a second tube-defining member having openings at least at its ends, the second tube-defining member being expandable from a low profile configuration to an expanded configuration; advancing the second tube into the first tube and through the transverse opening thereby to define a bifurcated configuration; and expanding the second tube from its low profile to an expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for placing a bifurcated stent in a body lumen having a common portion and two branches communicating with the common portion comprising:
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providing a first tube-defining member open at each end and having a transverse opening formed between its ends, the tube-defining member being expandable radially from a low profile to an expanded configuration; advancing the first member through the body lumen to the branched region with the transverse opening at and exposed to the juncture of the branches of the body lumen; expanding the first tube-defining member into firm engagement with the inner surface of the common portion and one branch of the body lumen; providing a second tube-defining member having openings at least at its ends, the second tube-defining member being expandable from a low profile configuration to an expanded configuration; expanding the first member from its low profile diameter sufficiently to enable it to receive the second member while the second member is in its low profile configuration; advancing the second member into the first member and through the lateral opening with a portion of the second member extending into the other branch and a portion disposed within the common portion of the body lumen and the first tube-defining member; and expanding the second tube defining member from its low profile to an expanded configuration and into engagement with the lumen of the common portion and the other branch. - View Dependent Claims (12, 13, 14)
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15. A bifurcated stent comprising:
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a first stent comprising an elongate spine having proximal and distal ends and a plurality of tube-defining modules connected in longitudinal sequence to and along the spine, the modules being arranged to define a proximal group and a distal group, the modules in the proximal group being spaced longitudinally along the spine; the proximal and distal groups of the tube defining modules on the first stent being spaced from each other to define a lateral opening along the defined tube; and a second stent having proximal and distal ends, the proximal end having a plurality of spaced modules interfitted with the spaced modules in the first group of the first stent, the distal end of the second stent protruding laterally through the opening. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A bifurcated stent comprising:
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a first elongate support wire; a second support wire connected at one end to the first support wire at a junction between the ends of the first support wire, thereby defining a proximal portion on one side of the juncture and a pair of branched portions on the other side of the juncture; a plurality of tube-defining modules connected to the support wire proximally of the juncture and to each of the branch portions of the support wires; the tube-defining modules on the branch portions of the support wire being disposed at spaced intervals along the branch portions of the support wires to enable the modules on the branch wires to be interfitted and to lie along a substantially common axis with the axis defined by the modules on the proximal portion of the first support wire whereby the bifurcated stent may be compacted into a substantially single tubular configuration insertable into a delivery sheath.
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36. A bifurcated stent as defined in 35 further comprising:
the portion of the second support wire that extends between the juncture and the modules on the second support wire being formed to enable relative longitudinal movement between the modules on the second support wire and the juncture. - View Dependent Claims (37, 38, 39)
Specification