Stent delivery apparatus and method
First Claim
1. A stent delivery device for delivering at least one stent to a treatment site, the device comprising:
- a catheter shaft having a proximal end and a distal end;
at least one stent comprising a plurality of separable stent segments positionable on the catheter shaft;
a stent deployment mechanism for deploying at least a portion of the stent at the treatment site, the deployment mechanism comprising a stent expansion member coupled with the catheter shaft near the distal end and at least one axially movable sheath disposed over at least part of the stent expansion member and the stent thereon, the deployment mechanism allowing a length of the deployed portion of the stent to be selected, wherein the length of the deployed portion comprises at least two stent segments which are expanded simultaneously while at least another stent segment is retained unexpanded on the catheter shaft; and
a dilatation member for dilating at least a portion of a lesion at the treatment site independently of deploying the at least one stent, wherein and the dilatation member is independently expandable of the stent expansion member.
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus and methods for stent delivery provide for dilatation at a treatment site as well as stent delivery, using the same stent delivery apparatus. Apparatus generally include a catheter having at least one expandable member, at least one stent positionable thereon, and a sheath disposed over the expandable member and the stent. Some embodiments include separate expandable members for dilatation of a lesion and for stent expansion, while other embodiments use the same expandable member for both. In some embodiments a stent includes multiple separable stent segments. In various embodiments, self-expanding stents may be used. Methods involve positioning a stent delivery device at a treatment site, expanding an expandable member to dilate at least a portion of a lesion at the treatment site, and expanding (or allowing to expand) a stent at the treatment site.
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Citations
33 Claims
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1. A stent delivery device for delivering at least one stent to a treatment site, the device comprising:
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a catheter shaft having a proximal end and a distal end; at least one stent comprising a plurality of separable stent segments positionable on the catheter shaft; a stent deployment mechanism for deploying at least a portion of the stent at the treatment site, the deployment mechanism comprising a stent expansion member coupled with the catheter shaft near the distal end and at least one axially movable sheath disposed over at least part of the stent expansion member and the stent thereon, the deployment mechanism allowing a length of the deployed portion of the stent to be selected, wherein the length of the deployed portion comprises at least two stent segments which are expanded simultaneously while at least another stent segment is retained unexpanded on the catheter shaft; and a dilatation member for dilating at least a portion of a lesion at the treatment site independently of deploying the at least one stent, wherein and the dilatation member is independently expandable of the stent expansion member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14)
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10. A stent delivery device for delivering at least one stent to a treatment site, the device comprising:
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a catheter shaft having a proximal end and a distal end; at least one stent positionable on the catheter shaft, wherein the stent comprises a plurality of separable segment; a stent deployment mechanism for deploying at least a portion of the stent at the treatment site, the deployment mechanism comprising a stent expansion member coupled with the catheter shaft near the distal end and at least one axially movable sheath disposed over at least part of the stent expansion member and the stent thereon, the deployment mechanism allowing a length of the deployed portion of the stent to be selected, wherein the sheath is configured to constrain expansion of a first portion of the stent expansion member and a first plurality of the stent segments while allowing expansion of a second portion of the stent expansion member and a second plurality of the stent segments; and a dilatation member for dilating at least a portion of a lesion at the treatment site independent of deploying the at least one stent, wherein and the dilatation member is independently expandable of the stent expansion member, wherein the sheath further comprises at least one separation device for separating the first plurality of stent segments from the second plurality, thus allowing for expansion of a stent segment without interfering with adjacent stent segments.
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15. A stent delivery device for delivering at least one stent to a treatment site, the device comprising:
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a catheter shaft having a proximal end and a distal end; at least one stent comprising a plurality of separable stent segments positionable on the catheter shaft; a stent expansion member coupled with the catheter shaft near the distal end, a selectable length of the stent being positionable on the expansion member, wherein the selectable length comprises at least two stent segments which are expanded simultaneously while at least another stent segment is retained on the catheter shaft; at least one axially movable sheath disposed over the catheter shaft and stent; an inner shaft slidably disposed within the catheter shaft; and a dilatation member coupled with a distal end of the inner shaft for dilating one or more lesions at the treatment site and wherein the dilatation member and the stent expansion member are separately expandable. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A stent delivery device for delivering at least one stent to a treatment site, the device comprising:
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a catheter shall having a proximal end and a distal end; at least on stent positionable on the catheter shaft, wherein the stent comprises a plurality of separable stent segments; a stent expansion member coupled with the catheter shaft near the distal end, the stent being positionable on the expansion member; at least one axially movable sheath disposed over the catheter shaft and stent, wherein the sheath is configured to constrain expansion of a first plurality of the stent segments while allowing expansion of a second plurality of the stent segments, wherein the sheath further comprises at least one separation device for separating the first plurality of stent segments from the second plurality, thus allowing for expansion of a stent segment without interfering with adjacent stent segments; an inner shaft slidably disposed within the catheter shaft; and a dilatation member coupled with a distal end of the inner shaft for dilating one or more lesions at the treatment site and wherein the dilatation member and the stent expansion member are separately expandable.
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26. A method for delivering at least one stent to a treatment site, the method comprising:
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positioning a distal portion of a stent delivery catheter device at the treatment site, the stent delivery catheter having a proximal end, a distal end and a shaft carrying at least one stent, the stent comprising a plurality of separable stent segments; expanding at least a portion of a dilatation member of the catheter device to dilate at least a portion of a lesion at the treatment site; and expanding at least a portion of a stent expansion member of the catheter device to deploy a selectable length of the at least one stent at the treatment site, wherein the selectable length comprises at least two stent segments which are expanded simultaneously while at least another stent segment is retained on the stent delivery catheter and wherein the stent expansion member is coupled with the shaft near the distal end, the stent being positionable on the expansion member and wherein the dilatation member and the stent expansion member are separately expandable. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification