WO1999015109A2 - Bifurcate stent - Google Patents
Bifurcate stent Download PDFInfo
- Publication number
- WO1999015109A2 WO1999015109A2 PCT/US1998/020254 US9820254W WO9915109A2 WO 1999015109 A2 WO1999015109 A2 WO 1999015109A2 US 9820254 W US9820254 W US 9820254W WO 9915109 A2 WO9915109 A2 WO 9915109A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stent
- modules
- spine
- configuration
- bifurcated
- Prior art date
Links
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
-
- 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
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
-
- 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
Definitions
- a stent placement of an endoluminal prostheses, commonly referred to as a stent, that can be
- a lumen such as a blood vessel or other natural pathway of a patient's body.
- Such stents typically define a generally tubular configuration, and are expandable from a
- the stent is advanced endoluminally, by a delivery device, through the body lumen to the site where the stent is to be placed.
- the stent then can be expanded to a
- the delivery device is removed, leaving the implanted stent in place.
- the stent may serve to maintain open a blood vessel or other natural duct, the functioning of which had become impaired as a result of a pathological or traumatic
- PTA percutaneous transluminal angioplasty
- PTA and PTCA involve the
- dilatation balloon of the catheter within an obstructed portion (stenosis) of a blood vessel.
- the balloon is expanded forcibly within the obstruction to dilate that portion of the blood
- Stenoses may often develop in the branching region of a patient's blood vessel.
- Treatment of a stenosis in the branched region may present numerous additional difficulties
- the invention includes, inter alia, stents, methods for making stents, and
- stents described herein can include, but are not limited
- bifurcated stents constructed in a modular fashion and having at least one elongate spine suitable for disposition within a vessel.
- the spine can attach to a plurality of
- module can define, in cooperation with its associated spine, a closed, ring-like structure,
- modules being aligned in an array to define a cage-like, generally tubular structure.
- Each of the modules may be formed from wire and is radially expandable from a reduced
- Each spine can
- modules include a longitudinal support wire to which the modules may be individually mounted in
- the bifurcated stent is composed of three sections, one main body and two side branch sections. Each section can define a single tubular configuration
- main body of the stent is connected to the two side branch sections by means of one or
- the stents described herein can be placed onto a dual balloon
- protective retractable covering sleeve over the stent may also be employed.
- the stent can be any suitable retractable covering sleeve over the stent.
- modules be deployed by applying a radial force to the modules, optionally by inflation of a balloon
- Another object of the invention is to provide a bifurcated stent that can be placed in the coronary arteries as well as other branched vessels.
- Another object of the invention is to provide a bifurcated stent that can be tailored
- Another object of the invention is to provide a bifurcated stent of which a region of
- the bifurcate stent for example the region nearest the apex region of the branching vessel,
- a further object of the invention is to provide a bifurcated stent having good
- Another object of the invention is to provide a bifurcated stent construction that is
- Another object of the invention is to provide a bifurcated stent that can be used as a
- the stents described herein include a bifurcated stent for
- a balloon catheter preferably by a balloon catheter, can be expanded to fit the body lumen.
- the methods described herein include a method of deploying the stent, such as the above described bifurcated stent, wherein the stent is placed on a dual balloon catheter and is crimped down to its low profile configuration for insertion into the body lumen wherein
- the method can include deploying the stent wherein the stent is placed on at least two balloon
- catheters and is crimped down to its low profile configuration for insertion into the body lumen where in its positioned and deployed by the outward radial force exerted by the
- balloons and the tube-defining members can be in elastically expanded.
- the spines can be varied by offsetting the orientation of the spines relative to the
- spines utilized can vary in order to tailor the stent to a particular bifurcated lumen.
- wall coverage of the stent can be increased or decreased and the wall coverage of a
- particular region of the stent can be increased or decreased to tailor the stent to a particular
- the region or the stent can be increased or decreased to tailor the stent to a particular lumen, for example by altering the shape of the wire used to create a module.
- the profile of the stent could be reduced by altering the profile of the connectors in at least one
- the spines of the stent can have substantially greater mass than the modules to
- the tube defining members can comprise at least
- one elongated spine having a plurality of modules connected to a spine(s) at sequential
- each module defining a closed circumferential loop
- modules being arranged on the spine to define the tubular member and the modules being
- each module is formed from a serpentine wire having a plurality of elongate segments alternate with shorter connective bends, the module being
- the spine defines a mass substantially greater than that of the
- modules sufficiently to present a radiographically visual image of the spine when the device is disposed in the body and when positioning the stent within the body lumen by reference
- the bifurcated stent can include modules formed from a serpentine wire having a plurality of elongate segments alternate with shorter
- the serpentine wire can have free terminal ends and is attached to the serpentine wire
- spine by a connector and the spine can comprise a longitudinal support wire and said
- the bifurcated stent has at least one of the modules or support wires with a malleability different from the other.
- support wire and connectors can be formed from a material sufficiently similar in
- composition to inhibit development of corrosion at their respective junctures such as a
- a protective material such as carbon
- a drug/drug can be coated with a protective material, such as carbon, or can be coated with a drug/drug
- eluting substance such as an anticoagulant
- the stent can have an end modules attached to the support wire with the free terminal ends of one end module oriented toward the free terminal ends of the other end module.
- the modules can be inelastically deformable during expansion, and the stent can
- the stent can have a spacer disposed between adjacent connectors, the
- spacers being formed from the same material as the connectors, the spacers and connectors
- the bifurcated stent has at least an elongated support wire
- non-metallic material such as a polymeric material, nylon, or a
- the stent is protected by a retractable sleeve/sheath when
- the device may be used as a scaffolding for a peripheral/coronary graft and an be positioned by a specific delivery system and which can facilitate expansion by some means afterwards, for
- example a separate balloon catheter.
- FIG. 1 (a) is a side illustration of one bifurcate stent in a deployed configuration.
- FIG. 1(b) provides an oblique perspective of one bifurcate stent in a deployed
- FIG. 2 is a side illustration of one bifurcate stent in a deployed configuration
- FIG. 3 is a side illustration of one bifurcate stent in a deployed configuration with a
- FIG. 4 is a diagrammatic illustration of a stent of the type depicted in Figs. 1-3
- FIGs. 5(a)-(c) are diagrammatic illustrations of modules of the stent illustrating a
- FIG. 6(a)-(c) illustrate, diagrammatically, one manner in which a bifurcate stent can
- FIG. 7(a)-(e) illustrate, diagrammatically one technique for deploying a bifurcate stent by operation of separate balloon catheters.
- FIGs. l(a)-(b) illustrate one type of modular endoprosthesis, a stent, that may be
- FIG. 1 (a) depicts a stent having a main
- the depicted stent includes two spines 6, each of which
- proximal and distal can be understood from the stent of FIG. 1(a) and from the definition that the main body 3 is proximal of the side branches 5.
- FIG 1(a) further depicts that each of the spines 6 extend along the sidewall of the main body 3, branching off at the
- FIG 1 (a) further depicts that each spines 6 attaches to a respective one of the side branches 5, and continues on distally,
- the spines 6 connect the main body 3 to each of the side branches 5.
- a resilient spring 6 can be biased in the
- the endoprosthesis may be considered to define a cage-like tubular arrangement
- FIGs. 1 (a)-(b) is constructed from a plurality of individual modules, containing main body modules 11 and side branch modules 7
- the modules are expandable
- the radially expandable generally tubular modules 7 and 11 are mounted and
- mounted on a support wire 6, may be considered to define a virtual peripheral surface 12, that, in transverse cross-section, is in the form of a virtual closed curve or loop 8 about the
- modules 11 in the main body 3, when mounted on at least one support wire 6, may also be considered to define a virtual peripheral surface.
- Each module 7 and 11 can be formed from a wire 13 shaped and configured to
- the module may be
- wire 13 are free.
- the free ends 16 of the wire 13 may be attached to each other and to the
- bends that may be curved (e.g., circular) or may comprise shorter connective segments
- the connective bends between the longitudinal segments 14 may lie along and define a locus of the closed loop 8.
- the connective bends between the longitudinal segments 14 may lie along and define a locus of the closed loop 8.
- the wire 13 is formed so that the arrangement of bends will be uniformly circumferentially
- cusps 17 may be varied to vary the angle or to vary their number circumferentially about the closed loop 8 to vary the characteristics of the modules 7 and 1 1, including varying its
- endoprosthesis can further be tailored and made to conform ideally to the specific body lumen in which it is to be implanted.
- a stent may be provided to include modules 7
- stent having the foregoing dimensions can be expected to be expandable to diameters
- stent exhibits substantial resistance to radial collapse that can be well above the maximum
- a stent may be provided to include modules 11 formed from wire having a diameter of about 0.15 millimeter with elongate
- segments 14 are smoothly curved, they may have a radius of about 0.15 millimeter before
- a stent having the foregoing dimensions can be expected to be expandable to
- the connectors 9 may be constructed to be mounted on the first connectors 9
- the connector 9 preferably
- wire 6 may be firmly connected by means of a permanent deformation, for example, by crimping, or may be attached to each other by spot welding. When assembled using laser
- terminal portions 16 of the module 7 or 11 are first
- a ring 9 may be in the form of a relatively short segment of a tube receptive to the support wire 6 and the free ends 16 of the modules 7 and 11. The internal surface of the
- ring 9 may be contoured to closely match the contour defined by the support wire 6 and
- modules can be positioned as desired along the support wire 6 and can be secured in that
- the support wire 6 may be selected to provide the desired degree of
- the stent has at least
- the degree of stiffness or flexibility of the support wire can be selected independently of the wire from which the tubular modules 7
- the support wire 6 may be highly flexible to aid the stent to be carried through tortuous vessels, such ad coronary arteries.
- the invention incorporates a metal support wire 6 (e.g., stainless steel), the modular construction of the invention enables a fabrication of a stent in which the support wire may
- a metal support wire 6 e.g., stainless steel
- non-metallic materials such as polymeric materials, for example, nylon.
- the modular construction of the invention provides a substantially increased range of materials and properties for the individual components, each being selected to provide optimum results.
- the configuration of the stent enables the tubular frame 10 to be constructed to have a high
- the support wire 6 and modules may be treated and formed to vary the mechanical and functional characteristics independently of each other to obtain a desired configuration
- the module is formed may be subjected to an annealing heat treatment to control the
- modules 7 protect the balloon of a balloon catheter 4 (FIG. 4) used in the placement of the
- the elongate segments 14 will be
- expansion of the device can cause the elongate
- main body 3 and side branch 5 sections may be constructed
- FIG.5(c) illustrates an arrangement in which the module is
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- each of the wires 13 is constructed using two connectors 9 and support wires 6 circumferentially spaced about the virtual periphery 12, so as to create two spines.
- the connectors 9 shown in FIG. 5(c) may be pre-formed into a shape as shown so as to aid
- FIG. 6 illustrates a possible technique to deploy the stent, shown here as a general
- wires 19 are positioned in the bifurcate vessel 18 by means of the known prior art. This is
- the bifurcate stent is crimped into the dual balloons to obtain the
- the system can be advanced through a guiding catheter (not shown) to the site of the bifurcated vessel by any suitable system or method known in the art.
- the dual balloon catheter is now used to expand the stent to its deployed configuration by applying a radial force on
- balloons 25 are now deflated and can be removed along with the guide wires 19 to leave
- FIG. 7 illustrates one possible technique to deploy the stent, again shown here as a
- Two guide wires 19 are positioned in the bifurcate vessel 18 by any means
- the stent is crimped down onto two separate balloons, one balloon 21, being longer than the other 22.
- the bifurcate stent is crimped onto the two balloons 21
- stent are advanced over the guide wires to the bifurcate vessel 18 as depicted in FIG 7(a).
- the system can be advanced through a guiding catheter to the site of the bifurcated vessel by any suitable system or method known in the art.
- the two balloon catheters is now used
- modules of the stent 24 to its deployed configuration by applying a radial force on the modules of the stent 24 by means of the two balloons 21 and 22 sized to fit the side branch
- the wires embodied in the stent l(a)-(c) may be coated with a protective
- the stent may be expandable by other means, for example, by forming the module 7 from a shape memory alloy such as nitinol.
- stent may be provided with electrical resistance heaters to generate sufficient heat to induce
- a delivery system could be any delivery system
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98949567A EP0948296A2 (en) | 1997-09-25 | 1998-09-25 | Bifurcate stent |
AU95864/98A AU9586498A (en) | 1997-09-25 | 1998-09-25 | Bifurcate stent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/937,199 | 1997-09-25 | ||
US08/937,199 US6086611A (en) | 1997-09-25 | 1997-09-25 | Bifurcated stent |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999015109A2 true WO1999015109A2 (en) | 1999-04-01 |
WO1999015109A3 WO1999015109A3 (en) | 1999-05-20 |
Family
ID=25469618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/020254 WO1999015109A2 (en) | 1997-09-25 | 1998-09-25 | Bifurcate stent |
Country Status (4)
Country | Link |
---|---|
US (1) | US6086611A (en) |
EP (1) | EP0948296A2 (en) |
AU (1) | AU9586498A (en) |
WO (1) | WO1999015109A2 (en) |
Cited By (7)
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DE19934923A1 (en) * | 1999-07-20 | 2001-01-25 | Biotronik Mess & Therapieg | Balloon catheter |
US6579309B1 (en) | 1999-08-06 | 2003-06-17 | Biotronik Mess-Und Therapiegerate Gmbh & Co. Ingenieurburo Berlin | Stent for vessel branchings |
WO2007088375A1 (en) * | 2006-02-03 | 2007-08-09 | Ever Daniel Grech | Bifurcation stent |
WO2007108857A1 (en) * | 2006-03-23 | 2007-09-27 | Boston Scientific Scimed, Inc. | Side branch stent |
AU2005203457B2 (en) * | 2000-05-02 | 2008-06-19 | Cordis Corporation | Bifurcated stent and stent delivery system |
EP2666443B1 (en) * | 2012-05-21 | 2017-07-05 | Manli International Ltd. | Coil bioabsorbable bifurcation stent |
US20230000613A1 (en) * | 2019-11-22 | 2023-01-05 | Lifetech Scientific (Shenzhen) Co., Ltd. | Covered Stent |
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US20230000613A1 (en) * | 2019-11-22 | 2023-01-05 | Lifetech Scientific (Shenzhen) Co., Ltd. | Covered Stent |
US11918452B2 (en) * | 2019-11-22 | 2024-03-05 | Lifetech Scientific (Shenzhen) Co., Ltd. | Covered stent |
Also Published As
Publication number | Publication date |
---|---|
WO1999015109A3 (en) | 1999-05-20 |
EP0948296A2 (en) | 1999-10-13 |
AU9586498A (en) | 1999-04-12 |
US6086611A (en) | 2000-07-11 |
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