Stent grip and system for use therewith
First Claim
Patent Images
1. A stent delivery system comprising:
- a catheter, the catheter having an inner shaft and a retractable sheath, the inner shaft having at least one grip member engaged to a portion of the inner shaft nearer a distal end of the inner shaft than a proximal end of the inner shaft, the at least one grip member comprising a body region and a hub region, the body region being tapered from a first end to a second end, the hub region being adjacent to the first end of the body region, an outer diameter of the hub region being greater than an outer diameter of the first end of the body region; and
a stent, the stent being expandable from an unexpanded state to an expanded state, in the unexpanded state, at least a portion of the stent being disposed about a portion of the inner shaft and engaged to at least a portion of the body region of the at least one grip and the hub region of the at least one grip member being positioned between the stent and the proximal end of the inner shaft, in the unexpanded state, the retractable sheath overlying the stent, wherein the stent expands to the expanded state when the retractable sheath is retracted off of the stent,wherein the grip member is configured so that the stent directly contacts the hub region when the sheath is retracted.
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Abstract
A method and apparatus for reducing the longitudinal aspect of the catheter to stent force having at least one grip member for use with a stent delivery system. The grip engages a stent in the unexpanded state prior to delivery of the stent by retracting a stent retaining sheath. The grip has a body region having an outer diameter, a first end and a second end. The outer diameter of the first end is greater than the outer diameter of the second end. The grip is at least partially constructed from a polymeric material.
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Citations
16 Claims
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1. A stent delivery system comprising:
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a catheter, the catheter having an inner shaft and a retractable sheath, the inner shaft having at least one grip member engaged to a portion of the inner shaft nearer a distal end of the inner shaft than a proximal end of the inner shaft, the at least one grip member comprising a body region and a hub region, the body region being tapered from a first end to a second end, the hub region being adjacent to the first end of the body region, an outer diameter of the hub region being greater than an outer diameter of the first end of the body region; and a stent, the stent being expandable from an unexpanded state to an expanded state, in the unexpanded state, at least a portion of the stent being disposed about a portion of the inner shaft and engaged to at least a portion of the body region of the at least one grip and the hub region of the at least one grip member being positioned between the stent and the proximal end of the inner shaft, in the unexpanded state, the retractable sheath overlying the stent, wherein the stent expands to the expanded state when the retractable sheath is retracted off of the stent, wherein the grip member is configured so that the stent directly contacts the hub region when the sheath is retracted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 15)
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11. A method, comprising:
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providing a grip between a catheter shaft and an outer sheath, the grip being nearer a distal end of the catheter shaft than a proximal end of the catheter shaft, the grip comprising a body region and a hub region, the body region being tapered from a first end to a second end, the hub region being adjacent to the first end of the body region, an outer diameter of the hub region being greater than an outer diameter of the first end of the body region; providing a stent between the body region of the grip and the outer sheath, the hub region of the grip being positioned between the stent and the proximal end of the catheter shaft; and retracting the outer sheath relative to the catheter shaft, wherein the stent directly contacts the hub region when the outer sheath is retracted. - View Dependent Claims (12, 14, 16)
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Specification