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;
an expandable member coupled with the catheter shaft near the distal end;
at least one stent slidably positionable on the expandable member; and
at least one axially movable sheath disposed over at least part of the expandable member and stent thereon, wherein;
the sheath is axially movable relative to the catheter shaft to expose at least a portion of the expandable member without exposing the stent;
the exposed portion of the expandable member is expandable to dilate a lesion at the treatment site without expanding the stent;
a length of the exposed portion of the expandable member is selected in situ; and
the sheath is also movable to expose at least a portion of the stent to allow it to expand.
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.
535 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; an expandable member coupled with the catheter shaft near the distal end; at least one stent slidably positionable on the expandable member; and at least one axially movable sheath disposed over at least part of the expandable member and stent thereon, wherein; the sheath is axially movable relative to the catheter shaft to expose at least a portion of the expandable member without exposing the stent; the exposed portion of the expandable member is expandable to dilate a lesion at the treatment site without expanding the stent; a length of the exposed portion of the expandable member is selected in situ; and the sheath is also movable to expose at least a portion of the stent to allow it to expand. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A stent delivery device for treating a target site in a vessel, the device comprising:
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a catheter shaft having a proximal end and a distal end; a stent expansion member coupled with the catheter shaft near the distal end; a first stent slidably positionable on the expansion member and being deployable from the catheter shaft; a second stent slidably positionable on the expansion member and being deployable from the catheter shaft independently of the first stent; and a dilatation member for dilating the target site independently of deploying the first and second stents, the dilation member being independently expandable of the expansion member.
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9. A stent delivery device for delivering at least one stem to a treatment site, the device comprising:
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a catheter shaft having a proximal end and a distal end; a stent expansion member coupled with the catheter shaft near the distal end; at least one stent positionable on the stent expansion member; at least one axially movable sheath disposed over at least part of the stem expansion member and stent thereon; and a dilatation member coupled with the sheath for dilating one or more lesions at the treatment site, the dilation member being expandable beyond a diameter of the sheath to dilate the one or more lesions at the treatment site and the dilation member being independently expandable of the expansion member. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. 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 stem delivery catheter comprising an expandable member and carrying at least one stent; retracting a sheath disposed over the expandable member to expose at least a portion of the expandable member; expanding the exposed portion of the expandable member to dilate at least a portion of a lesion at the treatment site; selecting a deployable portion of the stent having a selected length; and expanding the deployable portion of the stent at the treatment site, an undeployed portion of the stent remaining in the delivery catheter. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A method for delivering at least one stent segment 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 stem delivery catheter carrying at least one stent segment and comprising an expandable member and sheath; exposing a portion of the expandable member outside the sheath; expanding at least a portion of the expandable member on the catheter device to dilate at least a portion of a lesion at the treatment site; and retracting the sheath on the catheter device to expose at least a portion of the at least one stent from within the sheath, the portion self-expanding at the treatment site. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification