CA2326882C - Balloon expandable stent with a self-expanding portion - Google Patents

Balloon expandable stent with a self-expanding portion Download PDF

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Publication number
CA2326882C
CA2326882C CA002326882A CA2326882A CA2326882C CA 2326882 C CA2326882 C CA 2326882C CA 002326882 A CA002326882 A CA 002326882A CA 2326882 A CA2326882 A CA 2326882A CA 2326882 C CA2326882 C CA 2326882C
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Prior art keywords
stent
self
expandable
expanding
parts
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Expired - Fee Related
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CA002326882A
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French (fr)
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CA2326882A1 (en
Inventor
Anthony C. Vrba
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Boston Scientific Ltd Bermuda
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Boston Scientific Ltd Bermuda
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Priority to CA2649381A priority Critical patent/CA2649381C/en
Publication of CA2326882A1 publication Critical patent/CA2326882A1/en
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Publication of CA2326882C publication Critical patent/CA2326882C/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/958—Inflatable balloons for placing stents or stent-grafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/065—Y-shaped blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/821—Ostial stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91525—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0048—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in mechanical expandability, e.g. in mechanical, self- or balloon expandability

Abstract

A stent consisting of at least two parts in juxtaposition, one part being of self-expandable characteristics while the other part is balloon expandable.

Description

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::. .. ..:.....

BALLOON EXPANDABLE S'TLNT VPITH A SELF-EXPANDING FORTION

Fi ld of the Invention The present invention relates to a new type of stent for transluminal implantation and in particular new vascular stents.

1RWkgMõnd of the Lnvenfion Stenu for translnminal implantation arc well known. They are generally comprised of m=llic supports which are inserted into a part of the human body such as bile ducts, thc urinaty systam, the digestive tube and notably by percutaneous route inside the blood vessels, usually the arteries in which case they are typicaIly termed vascular stents . Stents are usually generally cylitidrical and are constructed and arranged to expand radislly once in position within the body.
They are usua]1y inserted wbile thcy have a first relatively small diameter and implanted in a desired area, for example inside a vessel, then the stent is expanded in sftu umtil it reaches a second diameter larger than the first diameter. A balloon associated with the cat}xter is usuaIly used to provide the necessary interior radial force to the stent to cause it to expand radially, . Self-expanding stents are also known which can expand from a first diameter to a larger second diameter without the use of a means for applying an interior radial force, such as a balloon, to thcm. One such type of self-expandix-g stent is a stem made of a shape ntemory metal which cxpands to its second largcr diameter upon exposure to body temperaiure. Such stents are also known.
T re c z66 S04 iscloses a tubulatpras thesis ine uding atubula wall portion of looscd,v inter ocked nattern(g.g. of lc 'nlanM) to function with?*
a bodv h~m~The nro esis may bemade with self cxaandiug anchoring ends and balloan .exWdablc wall 'on.
US 5 741 25 discloses; a sclÃaxuanding in alwninal co=osite prosthesis The rnosthesis mayo'pbonalLv be b' =*cated.

&== of thr, Invention The present invcntion proposes a novel type of stent which combines a self-expanding part or portion with a part or portion which requires an interior radial force for expansion. More specifically, a stent for transhTM++inal irnQlantation according to the present inveation wM comprise cylindrical parts preferably in ~~^~=;~A 02326882 2000-10-02 ..... .......... :~:':

-la-juxtaposition, with at least one part being self-expanding whereas another part requires an interior radial force for its expansion, such as a balloon catheter or the like. Basically, the stent will consist of at least two of the aforementioned barts but may consist of more than two parts. Such an arrangement enables improved placement of the stent by providing immediate expansion in part upon release of the stent from its delivery catheter.
The one part which is capable of radially self-expanding and the other part comprise a plurality of serpentine bands. The parts are connected one to the other via connections extending between the bands.

A =
-2-Brief Description of the Figtires Figure 1 is a showing of one embodiment of a stent according to this invention;
Figure 2 is a schematic showing of a stent similar to that of Figure 1 on a delivery catheter;
Figure 3 is a schematic showing of the delivery system of Figure 2 with the stent released for implantation;
Figures 4 and 5 are schematic showings of a stent of the invention used in a vessel branching situation; and Figure 6 is a showing of another embodiment of a stent according to the invention, and Figures 7-10 are schematic showings of bifurcated stents making use of the invention.

Detailed Description of the Preferred Embodiments Figure 1 shows a stent which combines self-expanding characteristics and balloon expandable characteristics, i.e., requires expansion by use of a radial interior force. Preferably, the stent will have the self-expanding part 12 joined at one end in juxtaposition to the proximal end of a balloon expandable stent 14. The parts of the stent may be formed in accordance with any of the known stents extant in the prior art including stents formed of a plurality of undulating bands interconnected by members extending between adjacent bands.
Self-expanding part 12 of stent 10 consists of an undulating band 13 and balloon expandable stent 14 is formed of a plurality of undulating bands 15 interconnected by interconnecting members 17. Self-expanding part 12 is joined to balloon expandable part 14 by interconnecting members 19. Preferably, however, the self-expanding part 12 will be of a shape memory metal such as nitinol so as to enable self-expansion at body temperature upon release of the stent from its delivery catheter (not shown). The immediate expansion of part 12 aids in placement of the stent during release, following which a balloon or the like may be used to expand part 14.

Rl A ~ l r~ t'PA.- ~1Lr'FNCHEN 02 : 30 - :.: = : ~R. ::; :::<: ;:;
'125633009 - +49 8:3 23yy Lal:- 1 , Part 12 may be of a larger diameter, or it may be flared to provide the earliest possible contact with the body portion into which it is inserted, such as a vessel. This is -best seen for example in Figures 2 and 3 which show a stent 10 shni,lar to that of Figure I on a delivery cathet.er. Figure 2 shows the stent having the two ::>:<::>;::;:.;>:`:>;:': `~~<:~
~~1~~df~CA.,.02326882 2000-10-02 ~;

02 :30-12-,~~. % . _ Eil'~5G33U03-a +49 89 2399-#
4Fi:~ # 0 :...: ,.::=.:,;..:::.;.:::; ::..;.. :.:
~~ . ~ ~.~. ~ ~. ~ ~~.~s~~~ ~ . -:. ~~r~~~:'=~;~ ~~~;:; ~~~~i
-3-parts 12 and 14, respectively. Part 12 is the self-expanding part while part requires a separate force for expansion such as a balioon 16 of a delivery caxheter aener. ally indicated at 1$ inside the stent. In Figure 2, the stem is shown prior to release or deployntent, the self-expanding part is erelosed by a retractable sheath 20.
In Figure 3, the sheath has been retracted, allowing self-expanding part 12 to flare-outwardly. Subsequentty, balloon 16 may be used in the known manner to expand part 14.
Since most stent delivery catheters include a retractable sheath which exposes the stent for implantation and removal fronm the catheter, if the self-expanding part 12 is placed on the proximal end of the stent as shown, it will most 3ilely be able to lock the stent in place until the remainder of the stent is expanded as by balloon expansion. This placement is preferable although placement in other parts of t3ie stent proper may also be used.
When tbke self-expanding portion is placed at the proximal end of the stent, such a stent is particularly useful in, vessel stenting in which the vessel is of the bifurcating or bran,cbing type. Such a stent is shown scheznatically in figures 4 and 5 at 10. Figure 4 shows the stent having a proximal end part 12 which is s+elf-expanding while the remainder of the stent body 14 is baUoon expandable by balloon 16 on catheter 18. In Figure 4, the retras: table sheath has been removed allowing the self-expanding part to expand at the ostium 22 in a vessel 24 branching off of a main vessel such as aorta 26, helping to more accurately place the sten.t. Figure 5 shows the stent after expansion of part 14 by the balloon catheter and cathetcr retraction. A
stent according to the present invention alows positive placement of the stent near the ostium of the bafurcation.
Stents accordi,ng to the invention may also be comprised of m.ore than one self-expanding and one balloon expandable part. Any combination of rhese parts is deemed to be within tle scope of this invention. For example, referri,ng to Figure 6, a stent 110 is shown having a self-expanding part 112 at each end of a balloon expandable part 114. Self-expanding part 112 of stent 110 consists of an imdulating band 113 and balloon expandable stent 114 is formed of a plurality of undulating bands 115 interconnected by connecting members 117. Self-expanding part 112 is joined to balloon. expandable part 114 by interconnecting members 119.

:
A== 02326882 2000 - 10 -02 02- 30 -J2-:4.y..::..;: ?`2:29 _. F>1`563<3U0 y 1[. C ~~~ ~
=
::~:~;:.;;:;~;:::.>:~>~~::::::t:><;:>:~:~>::::;:.;:;::::;':::z:::::>~:>::>::;::
;::>;::::>:: >::;::::::::.;;. - ..... ..... ...7..
':'.`!A?~~":ii.~>..:..:.:.,:E::
.......................... . , ;.::<>:~~~~~~:>~:~~:: :~~~?:~:::;:. ::<::;=::.
-3a-Referring now to Figues 7-10, biSu=ted stents making use of the inventior_ ase described. Generally, bifnrcated stents consist of three segments or components, a main tzw* ansi two trranches. In makmg use of this invention, any of .. :!::':~::i':::.Y::i....I=:~;...';y';~~

02~3~_(2Y6882 2000 - 10 2
-4- :
the three components may be made to be balloon expandable or self-expandable, as desired. For example, Figure 7 shows an unexpanded bifurcated stent 10 of one configuration in schematic form having a trunk 30, a first branch 32 and a second branch 34. As shown, trunk 30 is self-expanding, such as part 12 in the earlier Figures, and branches 32 and 34 are balloon expandable, such as part 14 in the earlier Figures.
Figure 8 shows the stent of Figure 7 in an implanted position in a branching vessel 36.
Figure 9 shows another example of an unexpanded bifurcated stent 10 of another configuration in schematic form consisting of trunk 30 and branches 32 and 34. In this case, trunk 30 and branch 23 are both self-expanding and branch 34 is balloon expandable.
Figure 10 shows the stent of Figure 9 expanded in an implanted position in a branching vessel 36.
Trunk 30 in another embodiment may be balloon expandable while the branches 32 and 34 may be self-expandable.
The above Examples and disclosure are intended to be illustrative and not exhaustive. These examples and description will suggest many variations and alternatives to one of ordinary skill in this art. All these alternatives and variations are intended to be included within the scope of the attached claims. Those familiar with the art may recognize other equivalents to the specific embodiments described herein which equivalents are also intended to be encompassed by the claims attached hereto.

Claims (13)

What is claimed is as follows:
1. A stent for transluminal implantation comprised of a cylindrical structure including at least two joined cylindrical parts, one part being capable of radially self-expanding, the other part being radially expandable only by means of an interior radial force, wherein the one part which is capable of radially self-expanding and the other part are integrally connected characterized in that the parts comprise a plurality of serpentine bands, adjacent ones of which are connected one to the other via integral connections extending between the bands.
2. The stent of claim 1, wherein the two parts are in juxtaposition.
3. The stent of claim 1, wherein the other part is balloon expandable.
4. The stent of claim 1, wherein the one part is comprised of nitinol.
5. The stent of claim 1, wherein the one part comprises a proximal portion of the stent.
6. The stent of claim 5, wherein the one part is flared with respect to the rest of the stent when in the expanded condition.
7. The stent of claim 6, wherein the self-expanding part is flared.
8. The stent of claim 1, wherein the one part has a larger overall diameter than the rest of the stent.
9. The stent of claim 1, including a self-expanding part at each end of the other part.
10. The stent of claim 1, characterized in that the stent is comprised of three parts including a trunk and two branches and in which at least one part is capable of self-expansion and at least one part is radially expandable by means of an interior radial force.
11. The stent of claim 10, in which the trunk part and one branch part are self-expandable and the other branch part is balloon expandable.
12. The stent of claim 10, in which the trunk part is self-expandable and the branch parts are balloon expandable.
13. The stent according to claim 10, wherein the self-expandable part comprises a serpentine band which is longer than the serpentine bands in the part which is radially expandable only by means of an interior radial force.
CA002326882A 1998-05-29 1999-05-26 Balloon expandable stent with a self-expanding portion Expired - Fee Related CA2326882C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2649381A CA2649381C (en) 1998-05-29 1999-05-26 Balloon expandable stent with a self-expanding portion

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/087,526 1998-05-29
US09/087,526 US6168621B1 (en) 1998-05-29 1998-05-29 Balloon expandable stent with a self-expanding portion
PCT/US1999/011602 WO1999060953A1 (en) 1998-05-29 1999-05-26 Balloon expandable stent with a self-expanding portion

Related Child Applications (1)

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CA2649381A Division CA2649381C (en) 1998-05-29 1999-05-26 Balloon expandable stent with a self-expanding portion

Publications (2)

Publication Number Publication Date
CA2326882A1 CA2326882A1 (en) 1999-12-02
CA2326882C true CA2326882C (en) 2009-01-20

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CA002326882A Expired - Fee Related CA2326882C (en) 1998-05-29 1999-05-26 Balloon expandable stent with a self-expanding portion

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DE69920905T2 (en) 2005-11-17
ATE278365T1 (en) 2004-10-15
CA2649381A1 (en) 1999-12-02
EP1079768B1 (en) 2004-10-06
JP4307725B2 (en) 2009-08-05
US6168621B1 (en) 2001-01-02
EP1079768A1 (en) 2001-03-07
CA2326882A1 (en) 1999-12-02
WO1999060953A1 (en) 1999-12-02
CA2649381C (en) 2011-05-10
JP2002516143A (en) 2002-06-04
DE69920905D1 (en) 2004-11-11

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