Implant retention, detachment, and delivery system
First Claim
Patent Images
1. A delivery system for an implant, comprising:
- an elongated pusher having a distal pusher end and a proximal pusher end;
a retention structure having a proximal structure end fixed to said pusher near said distal pusher end, and a distal structural end being located distally away from said distal pusher end;
said retention structure having a radially compressed configuration and a radially expanded configuration;
a plurality of engagement elements fixed on said retention structure and protruding radially inwards of said retention structure; and
,an implant located near said distal pusher end and in contact with said retention structure;
wherein said distal structural end of said retention structure is positioned over a proximal end of said implant so as to leave a distal end of said implant uncovered by said retention structure; and
,wherein said retention structure engages said implant in said radially compressed configuration and releases said implant in said radially expanded configuration.
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Abstract
A medical implant delivery system is described. The system can be used to deliver a variety of implants including stents and/or stent grafts. The delivery system retains the implant during delivery and detaches the implant at a target location.
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Citations
20 Claims
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1. A delivery system for an implant, comprising:
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an elongated pusher having a distal pusher end and a proximal pusher end; a retention structure having a proximal structure end fixed to said pusher near said distal pusher end, and a distal structural end being located distally away from said distal pusher end;
said retention structure having a radially compressed configuration and a radially expanded configuration;a plurality of engagement elements fixed on said retention structure and protruding radially inwards of said retention structure; and
,an implant located near said distal pusher end and in contact with said retention structure; wherein said distal structural end of said retention structure is positioned over a proximal end of said implant so as to leave a distal end of said implant uncovered by said retention structure; and
,wherein said retention structure engages said implant in said radially compressed configuration and releases said implant in said radially expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A delivery system for an implant, comprising:
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a catheter having a passage therethrough between a distal catheter end and a proximal catheter end; an elongated pusher having a distal pusher end and a proximal pusher end;
said elongated pusher being disposed in said passage of said catheter so as to move longitudinally relative to said catheter;a retention structure having a proximal structure end fixed to said pusher near said distal pusher end, and a distal structural end being located distally away from said distal pusher end;
said retention structure having a radially compressed configuration and a radially expanded configuration;
said retention structure including a plurality of engagement structures connected to and protruding from said retention structure;and, an implant located near said distal pusher end and in contact with said retention structure; wherein said distal structural end of said retention structure is positioned over a proximal end of said implant while leaving a distal end of said implant exposed by said retention structure; and
,wherein said retention structure engages said implant in said radially compressed configuration within said passage of said catheter and releases said implant in said radially expanded configuration when advanced distally outside of said distal catheter end. - View Dependent Claims (9, 10, 11, 12)
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13. A vessel prosthesis delivery device comprising:
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an elongated pusher having a distal pusher end and a proximal pusher end; a retention structure connected to the pusher, the retention structure comprising a mesh of braided wires; the retention structure having a proximal end fixed to the pusher near the distal pusher end, and a distal end of the retention structure being free from direct connection to the pusher so as to allow radial expansion of the distal end of the retention structure and being at least partially located distally of the distal end of the pusher, the retention structure having a radially compressed configuration and a radially expanded configuration; and
,engagement elements protruding radially inward of the retention structure and sized to fit corresponding gaps in a prosthesis. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification