WO2005018499A1 - Stent with improved resistance to migration - Google Patents
Stent with improved resistance to migration Download PDFInfo
- Publication number
- WO2005018499A1 WO2005018499A1 PCT/US2004/025396 US2004025396W WO2005018499A1 WO 2005018499 A1 WO2005018499 A1 WO 2005018499A1 US 2004025396 W US2004025396 W US 2004025396W WO 2005018499 A1 WO2005018499 A1 WO 2005018499A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stent
- section
- expandable
- self
- trunk region
- Prior art date
Links
- 238000013508 migration Methods 0.000 title claims description 12
- 230000005012 migration Effects 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims description 21
- 230000013011 mating Effects 0.000 claims description 16
- 238000002788 crimping Methods 0.000 claims description 11
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 7
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000012781 shape memory material Substances 0.000 claims 2
- 230000001419 dependent effect Effects 0.000 description 10
- 230000001413 cellular effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000009975 flexible effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000431 shape-memory polymer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 206010002329 Aneurysm Diseases 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000002399 angioplasty Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 210000000013 bile duct Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000701 elgiloys (Co-Cr-Ni Alloy) Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 nitinol Chemical class 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
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
- A61F2/02—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
- A61F2/07—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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
-
- 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
- A61F2/89—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
-
- 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
- A61F2002/067—Y-shaped blood vessels modular
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/005—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0058—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0075—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
-
- 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
- A61F2250/0042—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 shape-memory transition temperatures, e.g. in martensitic transition temperature, in austenitic transition temperature
Definitions
- the present invention relates to a stent for use in body lumens. More specifically, the present invention relates to a stent that is sufficiently flexible to facilitate its deployment and conformance to a tortuous lumen, and sufficiently rigid to resist migration, once the stent is deployed.
- Stents are radially expandable endoprostheses which are typically intravascular implants capable of being implanted transluminally and enlarged radially after being introduced percutaneously.
- Stents may be implanted in a variety of body lumens or vessels such as within the vascular system, urinary tracts, bile ducts, etc. Stents may be used to reinforce body vessels and to prevent restenosis following angioplasty in the vascular system. They may be self-expanding, mechanically expandable or hybrid expandable.
- Stents are generally tubular devices for insertion into body lumens. However, it should be noted that stents may be provided in a wide variety of sizes and shapes. Balloon expandable stents require mounting over a balloon, positioning, and inflation of the balloon to expand the stent radially outward. Self-expanding stents expand into place when unconstrained, without requiring assistance from a balloon. A self-expanding stent is biased so as to expand upon release from the delivery catheter. Some stents may be characterized as hybrid stents which have some characteristics of both self-expandable and balloon expandable stents.
- Stents may be constructed from a variety of materials such as stainless steel, Elgiloy, nickel, titanium, nitinol, shape memory polymers, etc. Stents may also be formed in a variety of manners as well. For example a stent may be formed by etching or cutting the stent pattern from a tube or section of stent material; a sheet of stent material may be cut or etched according to a desired stent pattern whereupon the sheet may be rolled or otherwise formed into the desired substantially tubular, bifurcated or other shape of the stent; one or more wires or ribbons of stent material may be woven, braided or otherwise formed into a desired shape and pattern.
- materials such as stainless steel, Elgiloy, nickel, titanium, nitinol, shape memory polymers, etc. Stents may also be formed in a variety of manners as well. For example a stent may be formed by etching or cutting the stent pattern from a tube or section
- stents or stent components that may be braided are described in U.S. 5061275, U.S. 4655771, U.S. 6146403, U.S. 5836966, U.S. 642308, as well as in U.S. App. No. 10/063315 to Eder et al., filed April 10, 2002.
- a stent is implanted in a blood vessel or other body lumen at the site of a stenosis or aneurysm by so-called “minimally invasive techniques” in which the stent is compressed radially inwards and is delivered by a catheter to the site where it is required through the patient's skin or by a “cut down” technique in which the blood vessel concerned is exposed by minor surgical means.
- minimally invasive techniques in which the stent is compressed radially inwards and is delivered by a catheter to the site where it is required through the patient's skin or by a “cut down” technique in which the blood vessel concerned is exposed by minor surgical means.
- stents have been developed specifically to address the problems that arise in the treatment of stenoses at or near the site of a bifurcation of a body lumen are known in the art. Further, single bifurcated stents and grafts have been developed in order to treat such conditions at the site of a branch of a body lumen.
- a bifurcated stent and/or graft typically is configured in a "pant" design which comprises a tubular body or trunk and two tubular legs, however other configurations are also known wherein the stent includes a plurality of separate and/or inter- connectable portions which may be delivered to various positions at or around the bifurcation using a single or multiple catheters.
- a stent is provided that is adapted both to resist migration within a body lumen and to conform to a tortuous installation path or installed location.
- the stent includes a first section, typically self-expandable, of predetermined compressibility adapted to permit the section to conform to the shape of the body lumen through which it is transmitted or surrounding the section when deployed.
- the stent also includes a second section which is balloon-expandable and which is less compressible than the first section.
- the second section is adapted to firmly engage that part of the body lumen surrounding the second section when it is deployed, or to engage the inner surface of another stent with which it is mated or assembled upon deployment.
- the stent is a bifurcated stent.
- the stent comprises a trunk region and at least one leg region or branch extending therefrom.
- the trunk defines an opening which defines a first flow path therethrough and one or more branches adjacent thereto, wherein each branch defines additional flow paths.
- the trunk region of the stent includes a proximal section and a distal section, wherein the branch(es) extend from the distal section.
- This distal section of the trunk region, as well as at least a portion of each branch, is constructed from braided strands of material. In some embodiments this braided portion of the stent is self-expandable.
- the proximal section of the trunk region comprises a solid, tubular geometry with cellular openings to provide a rigid construction within a section of the trunk region of the stent to assist in resisting migration of the stent-graft. In some embodiments the proximal section of the trunk region is balloon expandable. In at least one embodiment, a modular mating stent is provided that is adapted to resist migration within a receiving stent.
- the modular mating stent includes a substantially self-expandable first section of predetermined compressibility adapted to permit the section to conform to the shape of a body lumen surrounding the section.
- the modular mating stent further includes a balloon-expandable second section less compressible than the first section adapted to firmly engage that part, i.e. the inner surface, of the receiving stent surrounding the second section when the two are assembled in a male-female relationship.
- Fig. 1 is a perspective view of an embodiment of the invention comprising a bifurcated stent.
- Fig. 2 is a perspective view of an embodiment of the invention comprising a crimping member that engages the two sections of differential compressibility in the trunk region of the stent of Fig. 1.
- Fig. 3 is a perspective view of an embodiment of the invention comprising a modular mating stent adapted to be received within and assembled with a receiving stent in accordance with another embodiment of the present invention.
- a bifurcated stent 20 adapted to resist migration within a body lumen.
- Stent 20 includes a trunk region 22 at least one leg region or branches, such as branches 26 and 24, extending therefrom.
- the trunk region 22 of stent 20 includes a first or proximal section 30 and a second or distal section 28.
- the branches 24 and 26 define separate flow paths which branch from the single flow path defined by the trunk region 22. At least a portion of each branch 24 and 26, as well as the distal section
- the branches 24 and 26 and section 28 of the trunk region 22 share a common predetermined compressibility (or flexibility) adapted to permit the branches 24 and 26 and section 28 to conform to the shape of the body lumens surrounding them at their deployment site and to easily advanced through the tortuous confines of body lumen(s).
- the branches 24 and 26 as well as the section 28 are substantially self-expandable.
- the proximal section 30 of the trunk region 22 is adapted to firmly engage that part of the body lumen surrounding the section 30 at its deployment site adjacent to the bifurcation of a vessel. The section 30 is deployed by mechanical or balloon expansion and is firmly seated within the vessel to resist stent migration.
- the section 30 likewise has a predetermined compressibility, but which is less compressible than that of the distal section 28 or the branches 24 and 26.
- section 30 is constructed from material having a substantially solid, tubular geometry with cellular openings, which may be obtained from a laser cut tube or sheet which formed into a tube.
- the distal section 28 and the branches 24 and 26 are integrally formed of one or more strands 31 of material that are interwoven or braided to form the respective portions of the stent 20.
- the sections 28 and 30 may be bonded, welded, or otherwise engaged together to form the trunk region 22.
- one or more distal members 33 of the proximal section 30 and one or more proximal members 35 of the distal section 28 are engaged together by at least one crimping members 32 (better seen in Fig. 2).
- a crimping member 32 comprises a tubular member or band 37 that is disposed about an overlapping portion of one or more distal members 33 and one or more proximal members 35. Once properly disposed, the crimping member is crimped or otherwise compressed in order to frictionally engage and retain the respective portions of members 33 and 35 contained therein.
- during delivery of the stent 20 when stent
- distal section 28 of the trunk 22 and branches 24 and 26 are caused or allowed to self-expand to a predetermined diameter within the vessel(s). Even after the branches 24 and 26 and/or the section 28 are fully expanded, the location of stent 20 may be adjusted before final placement and fixation.
- the proximal section 30 of the trunk 22 is expanded to a predetermined diameter in the vessel via a balloon or other mechanical expansion mechanism such as are known. Because of the greater rigidity of the proximal section 30, one the proximal section of the trunk 22 is fully expanded the stent 20 will remain fixed in its final position.
- proximal section 30 when expanded, it is less compressible than the distal section 28 and delivers a substantial radial resistance to force, preventing stent 20 from working its way away from its originally deployed position.
- proximal section 30 is typically formed of any of a variety of materials that provide or can be made to provide greater rigidity or compression resistance than that of the distal section 28. Such materials may include but are not limited to stainless steel, nitinol, etc.
- a vessel engagement member may be comprised of one or more hooks, barbs, T-fasteners, and/or other external surface features to assist in firmly engaging the surrounding body lumen.
- the stent 20 may be a stent-graft, wherein the stent 20 is provided with a graft lining or covering to provide fluid pathways from the unbifurcated end to the bifurcated end.
- proximal section 30 is a balloon-expandable, and thus more rigid, proximal section 30 constructed of nitinol but annealed (i.e., heat treated above the temperature necessary to effect shape-memory retention). Annealing the nitinol transforms its material properties from a shape memory alloy capable of re-expansion to a more rigid structure, conducive to fixation through alternative means such as balloon expansion.
- Fig. 2 is a detail view of crimping member 32 represented in Fig. 1 that secures the two sections of differential compressibility (i.e. section 28 and section 30) together.
- the exemplary configuration illustrates two braided members 35 of distal section 28 secured to one or more members 33 of the proximal section 30 via crimping member 32.
- crimping member 32 and/or other portions of the stent may be at least partially constructed of one or more radiopaque materials.
- stent 20 is not limited to the use of crimping members 32 as a securing mechanism between the first and second sections 30 and 38 of the trunk region 22.
- first section 30 and second section 28 may be secured together via welds, chemical or adhesive bonds, direct mechanical engagement (i.e. hooks, etc.) of the members 33 and 35, and any combinations thereof.
- proximal section 30 and distal section 28 may not be connected at all if their relative positions are maintained in some other way, such as by securing section 28 and section 30 each to the inside of a graft, sleeve or other device via sutures or other securement mechanisms such as sutures.
- the invention is also directed to a system comprising a modular mating stent 40 and receiving stent 42, an example of which is shown in FIG. 3.
- the modular mating stent 40 includes a first section 44 of predetermined compressibility adapted to permit section 44 to conform to the shape of a body lumen surrounding section 44.
- the modular mating stent 40 further includes a second section 46 less compressible than first section 44 and adapted to firmly engage that part of receiving stent 42 surrounding second section 46, i.e. the imier surface of stent 42 in the area where stent 40 is received during in vivo deployment and assembly.
- a graft 48 covers modular mating stent 40 and receiving stent 42, at least in part, defining a fluid passageway.
- First section 44 is constructed from braided strands of a shape memory alloy capable of re-expansion, while second section 46 is constructed from a non-shape memory alloy in a tubular geometry with cellular openings. Therefore, placement and fixation are achieved through alternative means such as balloon expansion.
- a notable difference from stent 20, however, is that mating stent 40 is deployed at least partially within receiving stent 42 as opposed to a body lumen, as represented in Fig. 3.
- the previously described principles of section 30 of stent 20 firmly engaging the surrounding body lumen apply to second section 46 of modular mating stent 40 firmly engaging the surrounding receiving stent 42 to resist migration and leakage.
- the above disclosure is intended to be illustrative and not exhaustive.
- any dependent claim which follows should be taken as alternatively written in a multiple dependent form from all prior claims which possess all antecedents referenced in such dependent claim if such multiple dependent format is an accepted format within the jurisdiction (e.g. each claim depending directly from claim 1 should be alternatively taken as depending from all previous claims).
- the following dependent claims should each be also taken as alternatively written in each singly dependent claim format which creates a dependency from a prior antecedent-possessing claim other than the specific claim listed in such dependent claim below.
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Cardiology (AREA)
- Pulmonology (AREA)
- Gastroenterology & Hepatology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002536169A CA2536169A1 (en) | 2003-08-19 | 2004-08-06 | Stent with improved resistance to migration |
EP04780261A EP1656082A1 (en) | 2003-08-20 | 2004-08-06 | Stent with improved resistance to migration |
JP2006523891A JP4750031B2 (en) | 2003-08-20 | 2004-08-06 | Stent with improved resistance to movement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/643,261 | 2003-08-19 | ||
US10/643,261 US7628806B2 (en) | 2003-08-20 | 2003-08-20 | Stent with improved resistance to migration |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005018499A1 true WO2005018499A1 (en) | 2005-03-03 |
WO2005018499A8 WO2005018499A8 (en) | 2006-06-22 |
Family
ID=34193828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/025396 WO2005018499A1 (en) | 2003-08-19 | 2004-08-06 | Stent with improved resistance to migration |
Country Status (5)
Country | Link |
---|---|
US (2) | US7628806B2 (en) |
EP (1) | EP1656082A1 (en) |
JP (1) | JP4750031B2 (en) |
CA (1) | CA2536169A1 (en) |
WO (1) | WO2005018499A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7429268B2 (en) | 2004-12-08 | 2008-09-30 | Innovational Holdings, Llc | Expandable medical device with differential hinge performance |
US7479127B2 (en) | 1999-05-20 | 2009-01-20 | Innovational Holding, Llc | Expandable medical device delivery system and method |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7018401B1 (en) | 1999-02-01 | 2006-03-28 | Board Of Regents, The University Of Texas System | Woven intravascular devices and methods for making the same and apparatus for delivery of the same |
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Also Published As
Publication number | Publication date |
---|---|
US7628806B2 (en) | 2009-12-08 |
US20100049291A1 (en) | 2010-02-25 |
WO2005018499A8 (en) | 2006-06-22 |
US20050043784A1 (en) | 2005-02-24 |
JP2007533347A (en) | 2007-11-22 |
JP4750031B2 (en) | 2011-08-17 |
CA2536169A1 (en) | 2005-03-03 |
EP1656082A1 (en) | 2006-05-17 |
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