MULTI-LAYER STENT ASSEMBLY
A stent assembly includes a first stent having a first plurality of struts defining a first cellular pattern and a second stent having a second plurality of struts defining a second cellular pattern. The first and second cellular patterns may be different. In one example, the first plurality of struts may be disposed within one or more first range of angles and the second plurality of struts may be disposed within one or more second range of angles, where the one or more first range of angles and the one or more second range of angles may be mutually exclusive ranges. In other examples, the first and second cellular patterns may be mirrored or have a different periodicity.
1 . A method for stenting a target site of a vessel, the method comprising:
delivering a first stent in a radially contracted configuration to the target site of the vessel, the first stent including a first plurality of interconnected struts defining a first cellular pattern over at least a portion of the first stent;
deploying the first stent at the target site of the vessel, wherein deploying causes the first stent to expand to a radially expanded configuration;
delivering a second stent in a radially contracted configuration to the target site of the vessel, the second stent including a second plurality of interconnected struts defining a second cellular pattern over at least a portion of the second stent, wherein the second cellular pattern is different than the first cellular pattern; and
deploying the second stent at the target site of the vessel in an overlapping arrangement with the first stent, wherein deploying causes the second stent to expand to a radially expanded configuration.
2 . The method of claim 1 , wherein the first plurality of interconnected struts defining the first cellular pattern are disposed within a first range of angles from a longitudinal axis of the first stent and the second stent, and wherein the second plurality of interconnected struts defining the second cellular pattern are disposed within a second range of angles from the longitudinal axis of the first stent and the second stent, wherein first range of angles and the second range of angles are mutually exclusive ranges.
3 . The method of claim 1 , wherein the first plurality of interconnected struts defining the first cellular pattern are disposed within a first range of angles and a third range of angles from a longitudinal axis of the first stent and the second stent, and wherein the second plurality of interconnected struts defining the second cellular pattern are disposed within a second range of angles and fourth range of angles from the longitudinal axis of the first stent and the second stent, wherein first range of angles, second range of angles, third range of angles, and fourth range of angles are mutually exclusive ranges.
4 . The method of claim 1 , wherein the first plurality of interconnected struts defining the first cellular pattern are disposed within a first range of angles, a third range of angles, and a fifth range of angles from a longitudinal axis of the first stent and the second stent, and wherein the second plurality of interconnected struts defining the second cellular pattern are disposed within a second range of angles, a fourth range of angles, and a sixth range of angles from the longitudinal axis of the first stent and the second stent, wherein first range of angles, second range of angles, third range of angles, fourth range of angles, fifth range of angles, and sixth range of angles are mutually exclusive ranges.
5 . The method of claim 1 , wherein the second cellular pattern has a mirrored cellular configuration of the first cellular pattern.
6 . The method of claim 1 , wherein the second cellular pattern has a different periodicity than the first cellular pattern.
7 . The method of claim 1 , wherein the first cellular pattern is a right-handed helical pattern and the second cellular pattern is a left-handed helical pattern.
8 . A stent assembly, comprising:
a first stent including a first plurality of interconnected struts defining a first cellular pattern, wherein the first plurality of interconnected struts are disposed within one or more first discrete range of angles from a longitudinal axis of the first stent; and
a second stent including a second plurality of interconnected struts defining a second cellular pattern, wherein the second plurality of interconnected struts are disposed within one or more second discrete range of angles from the longitudinal axis of the first stent, wherein the one or more first discrete range of angles are non-overlapping with the one or more second discrete range of angles,
wherein the first stent and the second stent are configured to be deployed in an overlapping arrangement.
9 . The stent assembly of claim 8 , wherein the first stent is connected to the second stent.
10 . The stent assembly of claim 8 , wherein the first stent and the second stent are arranged in the overlapping arrangement on a delivery device.
11 . The stent assembly of claim 8 , wherein the one or more first discrete range of angles includes two or more discrete ranges of angles and wherein the one or more second discrete range of angles includes two or more discrete ranges of angles.
12 . The stent assembly of claim 8 , wherein the one or more first discrete range of angles includes three or more discrete ranges of angles and wherein the one or more second discrete range of angles includes three or more discrete ranges of angles.
14 . The stent assembly of claim 8 , wherein the first cellular pattern is a right-handed helical pattern and the second cellular pattern is a left-handed helical pattern.
15 . A stent assembly, comprising:
a stent layer including a first plurality of interconnected struts defining a first cellular pattern, wherein a first portion of the stent layer is inverted into a second portion of the stent layer.
16 . The stent assembly of claim 15 , wherein the first stent layer include a third portion having some of the interconnected struts removed.
17 . A stent delivery system, comprising:
a delivery wire having a proximal region and a distal region; a first stent including a first plurality of struts defining a first cellular pattern, the first stent disposed around a portion of the distal region of the delivery wire;
a second stent including a second plurality of struts defining a second cellular pattern, the second stent disposed around a portion of the distal region of the delivery wire, wherein the first cellular pattern and the second cellular pattern are different; and
a retractable sheath slidably disposed about the delivery wire, first stent, and second stent.
18 . The stent delivery system of claim 17 , wherein the first plurality of interconnected struts defining the first cellular pattern are disposed within one or more first discrete range of angles from a longitudinal axis of the first stent and the second stent, and wherein the second plurality of interconnected struts defining the second cellular pattern are disposed within one or more second discrete range of angles from the longitudinal axis of the first stent and the second stent, wherein the one or more first discrete ranges of angles and the one or more second discrete range of angles are mutually exclusive.
19 . The stent delivery system of claim 17 , wherein the second cellular pattern has a mirrored cellular configuration of the first cellular pattern.
20 . The stent delivery system of claim 17 , wherein the second cellular pattern has a different periodicity than the first cellular pattern.