Expandable stent and delivery system
First Claim
Patent Images
1. An expandable stent and delivery system comprising:
- an elongated core member having proximal and distal sections;
a proximal cylindrical member disposed about the distal section of said core member;
an intermediate cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said proximal cylindrical member and spaced apart from said proximal cylindrical member to form a first gap having a longitudinal length;
a distal cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said intermediate cylindrical member and spaced apart from said intermediate cylindrical member to form a second gap having a longitudinal length;
an expandable stent having proximal and distal ends and a longitudinal axis, said stent including at least one proximal leg taking the form of an elongated projection and extending proximally from the proximal end of said stent, said stent also including at least one distal leg taking the form of an elongated projection extending distally from the distal end of said stent, said stent further including at least one anchor member attached to said proximal leg and taking the form of an extension having a longitudinal length less than the longitudinal length of said first gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent also including at least one anchor member attached to said distal leg and taking the form of an extension having a longitudinal length less than the longitudinal length of said second gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent mounted on said intermediate cylindrical member and positioned such that said anchor members interlock within said gaps; and
, a deployment catheter having a lumen extending therethrough and disposed about said core member such that said deployment catheter constrains said expandable stent about said intermediate cylindrical member causing said anchor members to be maintained in said gaps and thereby causing said stent to be interlocked onto said core member.
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Abstract
An expandable stent and delivery system is provided for enhancing luminal dilation of a blood vessel. The delivery system includes proximal, intermediate and distal cylindrical members disposed on and spaced apart along an elongated core member such that first and second gaps are formed. The expandable stent includes proximal and distal anchor members which align with the gaps. The expandable stent is mounted on the intermediate cylindrical member, and the anchor members are disposed within the gaps thereby locking the stent onto the core member.
55 Citations
19 Claims
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1. An expandable stent and delivery system comprising:
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an elongated core member having proximal and distal sections;
a proximal cylindrical member disposed about the distal section of said core member;
an intermediate cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said proximal cylindrical member and spaced apart from said proximal cylindrical member to form a first gap having a longitudinal length;
a distal cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said intermediate cylindrical member and spaced apart from said intermediate cylindrical member to form a second gap having a longitudinal length;
an expandable stent having proximal and distal ends and a longitudinal axis, said stent including at least one proximal leg taking the form of an elongated projection and extending proximally from the proximal end of said stent, said stent also including at least one distal leg taking the form of an elongated projection extending distally from the distal end of said stent, said stent further including at least one anchor member attached to said proximal leg and taking the form of an extension having a longitudinal length less than the longitudinal length of said first gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent also including at least one anchor member attached to said distal leg and taking the form of an extension having a longitudinal length less than the longitudinal length of said second gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent mounted on said intermediate cylindrical member and positioned such that said anchor members interlock within said gaps; and
,a deployment catheter having a lumen extending therethrough and disposed about said core member such that said deployment catheter constrains said expandable stent about said intermediate cylindrical member causing said anchor members to be maintained in said gaps and thereby causing said stent to be interlocked onto said core member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An expandable stent and delivery system comprising:
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an elongated core member having proximal and distal sections;
a proximal cylindrical member disposed about the distal section of said core member;
a distal cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said proximal cylindrical member and spaced apart from said proximal cylindrical member to form a gap having a longitudinal length;
an expandable stent having a longitudinal axis, said stent including an anchor member attached to said stent and taking the form of an extension having a longitudinal length less than the longitudinal length of said gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent mounted on at least one cylindrical member and positioned such that said anchor member interlocks within said gap; and
,a deployment catheter having a lumen extending therethrough and disposed about said core member such that said deployment catheter constrains said expandable stent about at least one cylindrical member causing said anchor member to be maintained in said gap and thereby causing said stent to be interlocked onto said core member. - View Dependent Claims (11, 12)
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13. An expandable stent and delivery system comprising:
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an elongated core member having proximal and distal sections;
a proximal cylindrical member disposed about the distal section of said core member;
a distal cylindrical member disposed about the distal section of said core member and generally positioned on said core member distally from said proximal cylindrical member and spaced apart from said proximal cylindrical member to form a gap having a longitudinal length;
an expandable stent having a longitudinal axis, said stent including an anchor member attached to said stent and taking the form of an extension having a longitudinal length approximately equal to the longitudinal length of said gap and inwardly projected in a direction toward the longitudinal axis of said stent, said stent mounted on at least one cylindrical member and positioned such that said anchor member interlocks within said gap; and
,a deployment catheter having a lumen extending therethrough and disposed about said core member such that said deployment catheter constrains said expandable stent about at least one cylindrical member causing said anchor member to be maintained in said gap and thereby causing said stent to be interlocked onto said core member. - View Dependent Claims (14, 15)
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16. An expandable stent and delivery system comprising:
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an elongated core member having proximal and distal sections;
a plurality of cylindrical members disposed about the distal section of said core member and spaced apart to form a plurality of gaps each having a longitudinal length;
an expandable stent having a longitudinal axis, said stent including a plurality of anchor members attached to said stent and taking the form of extensions having a longitudinal length less than the longitudinal length of said gaps and inwardly projected in a direction toward the longitudinal axis of said stent, said stent mounted on at least one cylindrical member and positioned such that said anchor members interlock within said gaps; and
,a deployment catheter having a lumen extending therethrough and disposed about said core member such that said deployment catheter constrains said expandable stent about at least one cylindrical member causing said anchor members to be maintained in said gaps and thereby causing said stent to be interlocked onto said core member.
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17. A method for deploying an expandable stent within a blood vessel to enhance luminal dilation of the blood vessel, the method comprising the steps of:
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providing an expandable stent and delivery system, said expandable stent mounted on at least one cylindrical member along a core member of said delivery system, said stent having at least one anchor member interlocked within at least one gap along said core member, said gap formed by spaces between a plurality of cylindrical members disposed on said core member, said delivery system including a deployment catheter disposed about said stent maintaining said stent in a constrained configuration;
inserting said expandable stent and delivery system into a blood vessel;
positioning said expandable stent adjacent to a blockage area within said vessel;
moving said deployment catheter proximally allowing said stent to begin expanding within said vessel;
further moving said deployment catheter proximally allowing said stent to fully deploy causing said vessel to increase luminal dilation; and
,removing said delivery system from said blood vessel.
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18. A method for deploying an expandable stent within a blood vessel to treat an aneurysm, the method comprising the steps of:
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providing an expandable stent and delivery system, said expandable stent mounted on at least one cylindrical member along a core member of said delivery system, said stent having at least one anchor member interlocked within at least one gap along said core member, said gap formed by spaces between a plurality of cylindrical members disposed on said core member, said delivery system including a deployment catheter disposed about said stent maintaining said stent in a constrained configuration;
inserting said expandable stent and delivery system into a blood vessel;
positioning said expandable stent adjacent to an aneurysm;
moving said deployment catheter proximally allowing said stent to begin expanding within said vessel;
further moving said deployment catheter proximally allowing said stent to fully deploy causing said aneurysm to be covered by said stent; and
,removing said delivery system from said blood vessel.
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19. A method for resheathing an expandable stent within a blood vessel, said method comprising the steps of:
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providing an expandable stent and delivery system, said expandable stent mounted on at least one cylindrical member along a core member of said delivery system, said stent having at least one anchor member interlocked within at least one gap along said core member, said gap formed by spaces between a plurality of cylindrical members disposed on said core member, said delivery system including a deployment catheter disposed about said stent maintaining said stent in a constrained configuration;
inserting said expandable stent and delivery system into a blood vessel;
positioning said expandable stent adjacent to a blockage area within said vessel;
moving said deployment catheter proximally allowing said stent to begin expanding within said vessel;
moving said deployment catheter distally forcing said stent back onto said cylindrical member of said delivery system; and
,relocating said expandable stent and delivery system.
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Specification