Stent delivery system with securement and deployment accuracy
First Claim
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1. A stent delivery system comprising:
- a catheter having an inner shaft, at least a portion of the inner shaft defining a stent mounting region;
a stent being defined by a stent wall having a proximal region with an opening and a distal region with an opening, the stent having an unexpanded state and an expanded state, in the unexpanded state, the stent being disposed about at least a portion of the stent mounting region;
a proximal band disposed about a proximal portion of the inner shaft, and a distal band disposed about a distal portion of the inner shaft, the proximal band and the distal band each comprising a body region having an outer surface and a protrusion extending radially outward from the other surface, when the stent is in the unexpanded state, the protrusion of the proximal band extends into the proximal opening of the stent and the protrusion of the distal band extends into the distal opening of the stent; and
a retractable sheath overlying the stent when the stent is in the unexpanded state.
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Abstract
A method and apparatus for reducing the longitudinal aspect of the catheter to stent force comprises 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 comprises 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.
273 Citations
16 Claims
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1. A stent delivery system comprising:
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a catheter having an inner shaft, at least a portion of the inner shaft defining a stent mounting region; a stent being defined by a stent wall having a proximal region with an opening and a distal region with an opening, the stent having an unexpanded state and an expanded state, in the unexpanded state, the stent being disposed about at least a portion of the stent mounting region; a proximal band disposed about a proximal portion of the inner shaft, and a distal band disposed about a distal portion of the inner shaft, the proximal band and the distal band each comprising a body region having an outer surface and a protrusion extending radially outward from the other surface, when the stent is in the unexpanded state, the protrusion of the proximal band extends into the proximal opening of the stent and the protrusion of the distal band extends into the distal opening of the stent; and a retractable sheath overlying the stent when the stent is in the unexpanded state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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 a proximal band and a distal band engaged thereto, the proximal band and the distal band each comprising a body region having an outer surface and a protrusion extending radially outward from the outer surface; and a stent, at least a portion of the stent being disposed about a portion of the inner shaft, the stent having a proximal opening and a distal opening, the stent being expandable from an unexpanded state to an expanded state, in the unexpanded state, the protrusion of the proximal band extends into the proximal opening and the protrusion of the distal band extends into the distal opening, and in the unexpanded state, the retractable sheath overlies the stent.
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16. A method of preventing longitudinal movement of a stent being delivered from a delivery catheter comprising a catheter shaft, a retractable sheath, a stent expandable from an unexpanded state to an expanded state, and at least one band disposed about a region of the catheter shaft underlying at least a portion of the stent, the at least one band having a proximal protrusion and a distal protrusion, the proximal and distal protrusions extending radially outward so that, in the unexpanded state of the stent, the proximal protrusion extends into a proximal opening in the stent and the distal protrusion extends into a distal opening in the stent, the method comprising moving the retractable sheath proximally so that the distal protrusion does not extend into the distal opening while the proximal protrusion remains extending into the proximal opening.
Specification