RECONSTRAINABLE STENT DELIVERY SYSTEM
First Claim
1. A delivery system for a self-expanding stent, said system comprises:
- an inner member located coaxially with an outer member, said inner member and said outer member including a distal and proximal end;
a pusher positioned at a proximal end of said inner member and coupled to said inner member;
a slider located coaxially with said inner member and positioned within and contacting an inner diameter of said stent;
a housing assembled on the pusher; and
a spring element positioned within said housing,wherein before deployment of the stent, the stent is constrained within an inner diameter of said outer member,wherein after partial deployment of the stent, the stent can be reconstrained by the outer sheath and the housing moving in the proximal direction for compressing the spring element to maintain the inner member under tension, andwherein during deployment of the stent said slider can rotate about and move longitudinally along said inner member allowing said stent to move distally or rotate within said outer member as said outer member is retracted to deploy said stent.
1 Assignment
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Accused Products
Abstract
The reconstrainable stent delivery system of the present invention comprises a proximal end and distal end which include inner and outer members. A pusher is positioned at the proximal end of the inner member. A slider is located coaxially with the inner member and is positioned within the inner diameter of the stent. The slider can rotate about and move longitudinally along one of an inner shaft or tube, such as the guide wire tube, such that the proximal end of the stent can move distally as the stent deploys. A pusher can be used on the guide wire tube such that the guide wire tube, pusher, and stent move proximally relative to the outer sheath and re-constrain the stent in the outer sheath. Furthermore, the pusher and guide wire tube could move distally as the outer sheath retracts proximally for stent deployment to accommodate foreshortening.
17 Citations
32 Claims
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1. A delivery system for a self-expanding stent, said system comprises:
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an inner member located coaxially with an outer member, said inner member and said outer member including a distal and proximal end; a pusher positioned at a proximal end of said inner member and coupled to said inner member; a slider located coaxially with said inner member and positioned within and contacting an inner diameter of said stent; a housing assembled on the pusher; and a spring element positioned within said housing, wherein before deployment of the stent, the stent is constrained within an inner diameter of said outer member, wherein after partial deployment of the stent, the stent can be reconstrained by the outer sheath and the housing moving in the proximal direction for compressing the spring element to maintain the inner member under tension, and wherein during deployment of the stent said slider can rotate about and move longitudinally along said inner member allowing said stent to move distally or rotate within said outer member as said outer member is retracted to deploy said stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A delivery system for a self-expanding stent, said system comprises:
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an inner member located coaxially with a first outer member, said inner member and said first outer member including a distal and proximal end; a pusher positioned at a proximal end of said inner member and coupled to said inner member; a slider located coaxially with said inner member and positioned within and contacting an inner diameter of said stent; a housing assembled on the pusher; a second outer member outside and co-axial with the first outer member; wherein before deployment of the stent, the stent is constrained within an inner diameter of said outer member during deployment of the stent said slider can rotate about and move longitudinally along said inner member allowing said stent to move distally or rotate within said outer member as said outer member is retracted to deploy said stent and secondary outer member and housing move together or remain stationary together.
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27. A delivery system for a self-expanding stent, said system comprises:
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an inner member located coaxially with an outer member, said inner member and said outer member including a distal and proximal end; a pusher positioned at a proximal end of said inner member; a slider located coaxially with said inner member and positioned within and contacting an inner diameter of said stent; and said slider includes first interlocking members and said stent includes second interlocking members, said first interlocking members interlocking to said second interlocking members, wherein before deployment of the stent, the stent is constrained within an inner diameter of said outer member during deployment of the stent said slider can rotate about and move longitudinally along said inner member allowing said stent to move distally or rotate within said outer member as said outer member is retracted to deploy said stent and secondary outer member and housing move together or remain stationary together. - View Dependent Claims (28, 29, 30, 31)
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32. A delivery system for a self-expanding stent, said system comprises:
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an inner member located coaxially with an outer member, said inner member and said outer member including a distal and proximal end; a gripper positioned coaxial and outside said outer member, a pusher positioned at a proximal end of said inner member; and a slider located coaxially with said inner member and positioned within and contacting an inner diameter of said stent; wherein before deployment of the stent, the stent is constrained within an inner diameter of said outer member; wherein after partial deployment of said stent said stent can be reconstrained by holding the pusher stationary and gripping the gripper for moving the outer sheath in the distal direction; and wherein during deployment of the stent said slider can rotate about and move longitudinally along said inner member allowing said stent to move distally or rotate within said outer member as said outer member is retracted to deploy said stent.
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Specification