Endoprothesis stent delivery system and method of using the same
First Claim
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1. A stent delivery device comprising:
- a catheter capable of removably mounting a radially expandable endoprosthesis stent in a compressed condition; and
a segmented sheath capable of overlying said compressed stent and capable of restraining said stent from radial expansion, said segmented sheath comprising a plurality of adjacent flaps that in combination are capable of completely encircling said compressed stent, each of said flaps being axially slidable with respect to all other said flaps;
wherein a first flap of the plurality of adjacent flaps has a projection running along at least part of its length, and said projection is adapted to engage a corresponding track on an adjacent second flap of the plurality of adjacent flaps to form a slidable coupling that permits said first and second flaps to slide axially with respect to one another; and
wherein each of said first and second flaps has a longitudinal edge adjacent to the longitudinal edge of the other of said first and second flaps, and wherein said adjacent longitudinal edges are connected by at least one of said slidable couplings.
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Abstract
An endoprosthesis deployment system includes an axial catheter, an outer sheath extending parallel to the axial catheter, and an inner sheath positioned transversely between the axial catheter and outer sheath, the inner sheath including first and second inner sheath sections extending along the axial catheter, each of said first and said second inner sheath sections mounted for axial movement relative to the other inner sheath section.
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Citations
14 Claims
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1. A stent delivery device comprising:
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a catheter capable of removably mounting a radially expandable endoprosthesis stent in a compressed condition; and a segmented sheath capable of overlying said compressed stent and capable of restraining said stent from radial expansion, said segmented sheath comprising a plurality of adjacent flaps that in combination are capable of completely encircling said compressed stent, each of said flaps being axially slidable with respect to all other said flaps; wherein a first flap of the plurality of adjacent flaps has a projection running along at least part of its length, and said projection is adapted to engage a corresponding track on an adjacent second flap of the plurality of adjacent flaps to form a slidable coupling that permits said first and second flaps to slide axially with respect to one another; and wherein each of said first and second flaps has a longitudinal edge adjacent to the longitudinal edge of the other of said first and second flaps, and wherein said adjacent longitudinal edges are connected by at least one of said slidable couplings. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of deploying an endoprosthesis stent, said method comprising:
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providing a stent delivery device comprising a catheter mounted with a self-expandable endoprosthesis stent in a compressed condition; restraining said stent from radial expansion by completely encircling said stent with a segmented sheath that comprises a plurality of flaps, each of said flaps being axially slidable with respect to all other said flaps; placing said device within a hollow organ with said self-expanding stent radially compressed by said flaps about said catheter; and
,axially withdrawing a first flap of said plurality of flaps from overlying engagement with said compressed stent to a sufficient extent that at least a portion of said compressed stent radially decompresses in the region vacated by said withdrawn first flap; providing a projection running along at least part of the length of said first flap, said projection being adapted to engage a corresponding track on an adjacent second flap of said plurality of flaps to form a slidable coupling that permits said first and second flaps to slide axially with respect to one another; and wherein each of said first and second flaps has a longitudinal edge adjacent to the longitudinal edge of the other of said first and second flaps, and including providing at least one of said slidable couplings between said adjacent longitudinal edges. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification