Self-expanding stent with enhanced delivery precision and stent delivery system
First Claim
1. A delivery system comprising:
- a delivery catheter including an inner tubular member having a region for mounting a stent thereon and an outer tubular member having a restraining sheath overlying said inner tubular member and adapted for axial movement with respect to said inner tubular member, the inner tubular member having an opening and a guide wire lumen extending therethrough;
wherein an annular space is formed between the outer tubular member and the inner tubular member, the opening in the inner tubular member being in fluid communication with the annular space and the guide wire lumen to allow fluid to be introduced into the guide wire lumen through the opening in the inner tubular member and into the annular space which eventually flows through the distal end of the outer tubular member; and
a housing assembly having a pull-back handle slidably mounted on a base, said inner tubular member having a proximal end attached to said base and said outer tubular member having a proximal end attached to said pull-back handle to allow movement of said pull-back handle proximally to retract said restraining sheath proximally from the mounted stent while the inner tubular member remains stationary.
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Accused Products
Abstract
The invention is directed to a self-expanding stent for implantation into a body lumen, such as an artery. The stent consists of a plurality of radially expandable cylindrical elements generally aligned on a common longitudinal stent axis and interconnected by a plurality of interconnecting members placed on the stent in a collinear arrangement such as to create at least one continuous spine which extends along the length of the stent. The invention is also directed to a stent delivery system for implantation of a stent in a vessel which includes an outer tubular member having a restraining sheath and an inner tubular member having a distal end which has a compressed stent mounted thereto. The proximal end of the inner tubular member is connected to a housing assembly which prevents the inner tubular member from moving when the outer tubular member is retracted to deploy the stent. The proximal end of the outer tubular member is attached to a pull-back handle which is slidably mounted on the base of the housing assembly. When the pull-back handle is retracted, the restraining sheath is retracted to deploy the sheath, while the inner tubular member remains stationary.
330 Citations
13 Claims
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1. A delivery system comprising:
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a delivery catheter including an inner tubular member having a region for mounting a stent thereon and an outer tubular member having a restraining sheath overlying said inner tubular member and adapted for axial movement with respect to said inner tubular member, the inner tubular member having an opening and a guide wire lumen extending therethrough;
wherein an annular space is formed between the outer tubular member and the inner tubular member, the opening in the inner tubular member being in fluid communication with the annular space and the guide wire lumen to allow fluid to be introduced into the guide wire lumen through the opening in the inner tubular member and into the annular space which eventually flows through the distal end of the outer tubular member; and
a housing assembly having a pull-back handle slidably mounted on a base, said inner tubular member having a proximal end attached to said base and said outer tubular member having a proximal end attached to said pull-back handle to allow movement of said pull-back handle proximally to retract said restraining sheath proximally from the mounted stent while the inner tubular member remains stationary. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification