EP0944367A1 - Flexible expandable vascular support - Google Patents

Flexible expandable vascular support

Info

Publication number
EP0944367A1
EP0944367A1 EP98930744A EP98930744A EP0944367A1 EP 0944367 A1 EP0944367 A1 EP 0944367A1 EP 98930744 A EP98930744 A EP 98930744A EP 98930744 A EP98930744 A EP 98930744A EP 0944367 A1 EP0944367 A1 EP 0944367A1
Authority
EP
European Patent Office
Prior art keywords
group
insert
strand
rings
strands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98930744A
Other languages
German (de)
French (fr)
Inventor
Norbert Heise
Antonio Colombo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gfe Gesellschaft fur Forschung und Entwicklung Mbh
Original Assignee
Gfe Gesellschaft fur Forschung und Entwicklung Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gfe Gesellschaft fur Forschung und Entwicklung Mbh filed Critical Gfe Gesellschaft fur Forschung und Entwicklung Mbh
Publication of EP0944367A1 publication Critical patent/EP0944367A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • A61F2/915Stents 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • A61F2/915Stents 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
    • A61F2002/91525Stents 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • A61F2/915Stents 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
    • A61F2002/91533Stents 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • A61F2/915Stents 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
    • A61F2002/9155Adjacent bands being connected to each other
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents 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
    • A61F2/91Stents 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
    • A61F2/915Stents 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
    • A61F2002/9155Adjacent bands being connected to each other
    • A61F2002/91558Adjacent bands being connected to each other connected peak to peak
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0013Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Definitions

  • the invention relates to an expandable insert with the features of the preamble of claim 1.
  • the known inserts have three tubular sections or segments that are made of a material that is compatible with an implant.
  • the three tubular segments are each connected to one another via bridge webs which are intended to allow the segments to be tilted or interleaved.
  • the individual segments are formed by cutting out rectangular sections from the jacket of the tubular segments.
  • adjacent cutouts are offset from one another in the circumferential direction.
  • the rectangular cutouts have long sides parallel to the axis and narrow sides running in the circumferential direction.
  • the front narrow sides are not connected to each other, so that the front side of the tubular segment looks crenellated.
  • the interconnected segments are aligned coaxially to one another in the unused state of the insert and are connected by bridges between the narrow faces at the front.
  • straight, parallel bridge webs run obliquely from one end face of a segment in the direction of the narrow side adjacent to the opposite narrow side in the circumferential direction.
  • Each narrow side of a segment is connected to a narrow side of the adjacent section, so that the inclined bridge webs give the insert a twisted appearance.
  • the rings with a shorter strand length can absorb compression forces well, while the rings with a longer strand length cover the spaces that arise between the rings of the first group relatively evenly.
  • the rings of the second group also allow flexibility in use for bending loads to the extent required.
  • the strand length of the second group is 1.2 to 2.0 times as long as the strand length of the first group, in particular 1.3 to 1.5 times as large, because there is a good relationship between these conditions Expandability and length reduction when expanding results.
  • An increased flexibility with respect to bending stresses results if the strand length of the second group is 1.7 to 1.9 times as long as the strand length of the first group.
  • the meandering strands of the second group have longitudinal sections which, in the unexpanded state, run parallel to the central axis of the base body.
  • the meander-shaped strands of the first group have peripheral portions which extend in the unexpanded state in the circumferential direction of the body '.
  • FIG. 1 shows the developed lateral surface of a cylindrical, tubular stent in the unexpanded state.
  • the jacket section 1 is shown in a plan view, the view showing the cylindrical, tubular base body being cut open along an axially parallel cutting line 2 and shown flatly spread out.
  • the outer surface is formed by a number of meandering strands 3a, b and 4a, b.
  • the material strands 3a and 3b are curved in a meandering or undulating manner in the circumferential direction of the insert, with almost semicircular arc sections 5 and straight longitudinal sections 6 running parallel to the axis alternating.
  • the strand length of the encircling material strand 3a or 3b is approximately 14.5 mm, which in the embodiment shown results in a diameter of 1.8 mm in the unexpanded state.
  • the meandering strand 3a or 3b can be periodic recurring shape are considered, each period comprising two longitudinal sections 6 and two arc sections 5. In this exemplary embodiment, three periodic regions are thus arranged in the circumferential direction.
  • the material strands 4a and 4b are also arranged circumferentially in a meandering fashion.
  • arc sections 7 and longitudinal sections 8 alternate, the longitudinal sections 8 running approximately parallel to the longitudinal sections 6 of the material strands 3a and 3b in the unexpanded state of the insert.
  • the material strands 4a, 4b also have a periodicity, the number of periods in this exemplary embodiment being twice as large as the number of periods of the material strands 3a, 3b. In the figure 1, the embodiment has six periodic sections.
  • the length of the material strands 4a, 4b is approximately 11 mm in the present exemplary embodiment, which also leads to a diameter of 1.8 mm in the present design.
  • the material strands 3a and 3b prevail approximately centrally in the respective longitudinal section 6 of the material strand 3a, 3b.
  • the material strands 4a, 4b penetrate the material strands 3a, 3b approximately at right angles.
  • the expandable insert according to the invention is cut as a one-piece element on a tube with an outside diameter of 1.8 mm.
  • implantable stainless steel is used as the material, but also other implantable materials.
  • the material thickness in the radial direction is essentially constant over the entire range of use.
  • FIG. 2 shows an insert according to FIG. 1 in the second, expanded state.
  • the diameter of the Use in the expanded state is 3.5 mm in this embodiment.
  • the resulting deformation by the application of a force acting radially from the inside leads to the material strands 4a and 4b being fully stretched, that is to say in practice forming a circular ring of 11 mm in circumference.
  • the longer material strands 3a and 3b are deformed into wavy, almost sinusoidal material strands.
  • the material strands 4a and 4b which are annular in the expanded state, oppose a uniform radial force exerting a great structural resistance, which reliably prevents the insert from collapsing in the treating blood vessel.
  • a lower material thickness can be used with the same resistance (recoil) compared to the known inserts. In both cases, the risk of a renewed narrowing of the cross-section of the treating blood vessel, also called re-stenosis, is lower than in the known applications.
  • the inserts according to the invention are inserted into the blood vessels to be treated with a balloon catheter.
  • the balloon catheter is expanded by injecting a fluid, whereupon the inserts expand permanently in the radial direction due to plastic deformation.
  • the insert After removing the balloon catheter, the insert remains in the blood vessel and we are surrounded by the intima within a short time.

Abstract

The invention relates to an expandable insert which can be used as a vascular support in blood vessels, wherein said insert can be plastically deformed from a non-expanded into an expanded state by applying a radial force which is directed from the inside outwards. The inventive insert comprises at least one tubular substantially cylindrical base body section, whose outer surface consists of a plurality of meander-shaped peripheral rings forming a single-piece material strand of a specific length. The insert is particularly rigid in relation to the externally operating radial forces since it is provided with a first group of rings whose length substantially corresponds to the perimeter of the insert when expanded and with a second group of rings which are longer than the perimeter of the insert when expanded.

Description

Flexible expandierbare GefäßstützeFlexible expandable stent
Die Erfindung betrifft einen expandierbaren Einsatz mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to an expandable insert with the features of the preamble of claim 1.
Derartige Einsätze, auch „Stents" genannt, sind bekannt aus der US-PS 5102417 sowie aus der US-PS 5195984.Such inserts, also called "stents", are known from US Pat. No. 5,102,417 and from US Pat. No. 5,195,984.
Die bekannten Einsätze weisen drei rohrförmige Abschnitte oder Segmente auf, die aus einem als Implantat verträglichen Material hergestellt sind. Die drei rohrförmigen Segmente sind jeweils über Brückenstege miteinander verbunden, die ein Kippen oder ein Verschränken der Segmente gegeneinander erlauben sollen.The known inserts have three tubular sections or segments that are made of a material that is compatible with an implant. The three tubular segments are each connected to one another via bridge webs which are intended to allow the segments to be tilted or interleaved.
Die einzelnen Segmente sind geformt durch Ausschneiden von rechteckigen Ausschnitten aus dem Mantel der rohrförmigen Segmente. Dabei sind jeweils in Umfangsrichtung benachbarte Ausschnitte gegeneinander versetzt. Die rechteckigen Ausschnitte weisen achsparallele Langseiten und in Umfangsrichtung verlaufende Schmalseiten auf. Die stirnseitigen Schmalseiten sind untereinander nicht verbunden, so daß durch die Freiräume die Stirnseite des rohrförmigen Segments zinnenartig aussieht. Bei den bekannten Einsätzen sind die miteinander verbundenen Segmente im unbenutzten Zustand des Einsatzes koaxial zueinander ausgerichtet und durch Brücken zwischen den stirnseitigen Schmalseiten verbunden. In der US-PS 5102417 verlaufen gerade, parallele Brückenstege von einer Stirnseite eines Segments schräg in Richtung auf die der gegenüberliegenden Schmalseite in Umfangsrichtung benachbarten Schmalseite. Jede Schmalseite eines Segments ist mit einer Schmalseite des benachbarten Abschnitts verbunden, so daß die schräg verlaufenden Brückenstege dem Einsatz ein verdrilltes Aussehen verleihen.The individual segments are formed by cutting out rectangular sections from the jacket of the tubular segments. In this case, adjacent cutouts are offset from one another in the circumferential direction. The rectangular cutouts have long sides parallel to the axis and narrow sides running in the circumferential direction. The front narrow sides are not connected to each other, so that the front side of the tubular segment looks crenellated. In the known inserts, the interconnected segments are aligned coaxially to one another in the unused state of the insert and are connected by bridges between the narrow faces at the front. In US Pat. No. 5,102,417, straight, parallel bridge webs run obliquely from one end face of a segment in the direction of the narrow side adjacent to the opposite narrow side in the circumferential direction. Each narrow side of a segment is connected to a narrow side of the adjacent section, so that the inclined bridge webs give the insert a twisted appearance.
Aus der US-PS 5195984 ist ein Einsatz bekannt, bei dem benachbarte Segmente jeweils zwischen zwei sich genau gegenüberliegenden Schmalseiten durch eine gerade, achsparallele Brücke verbunden sind. Zwischen jedem Segment gibt es lediglich einen Brückensteg, so daß der Zwischenraum zwischen den Segmenten im wesentlichen frei bleibt.An application is known from US Pat. No. 5,195,984 in which adjacent segments are each connected between two exactly opposite narrow sides by a straight, axially parallel bridge. There is only one bridge between each segment, so that the space between the segments remains essentially free.
Diese Einsätze erweisen sich in der Praxis bei geringen Materialstärken als nicht ausreichend steif gegenüber einer Kompression in radialer Richtung.In practice, these inserts prove to be insufficiently stiff with respect to compression in the radial direction with small material thicknesses.
Es ist daher Aufgabe der Erfindung, einen expandierbaren Einsatz zur Verwendung als Gefäßstütze in Blutgefäßen zu schaffen, bei dem bei ausreichender Flexibilität für die Anpassung an Gefäßkrümmungen eine besonders große Widerstandsfähigkeit (Recoil) gegenüber radial von außen einwirkenden Kräften besteht.It is therefore an object of the invention to provide an expandable insert for use as a vascular support in blood vessels, in which, with sufficient flexibility for adapting to vessel curvatures, there is a particularly great resistance (recoil) to forces acting radially from the outside.
Diese Aufgabe wird von einem expandierbaren Einsatz mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by an expandable insert with the features of claim 1.
Weil eine erste Gruppe von Ringen vorgesehen ist, deren Stranglänge im wesentlichen dem Umfang des Einsatzes im expandierten Zustand entspricht und eine zweite Gruppe von Ringen vorgesehen ist, deren Stranglänge größer ist als der Umfang des Einsatzes im expandierten Zustand, können die Ringe mit kürzerer Stranglänge Kompressionskräfte gut aufnehmen, während die Ringe mit größerer Stranglänge die Zwischenräume, die sich zwischen den Ringen der ersten Gruppe ergeben, relativ gleichmäßig abdecken. Die Ringe der zweiten Gruppe ermöglichen darüber hinaus eine Flexibilität des Einsatzes bei Biegebeanspruchungen im erforderlichen Umfang.Because a first group of rings is provided, the strand length of which essentially corresponds to the scope of use in the expanded state, and a second group of Rings are provided, the strand length of which is greater than the scope of use in the expanded state, the rings with a shorter strand length can absorb compression forces well, while the rings with a longer strand length cover the spaces that arise between the rings of the first group relatively evenly. The rings of the second group also allow flexibility in use for bending loads to the extent required.
Es ist vorteilhaft, wenn die Stranglänge der zweiten Gruppe 1,2 bis 2,0 mal so groß ist wie die Stranglänge der ersten Gruppe, insbesondere 1,3 bis 1,5 mal so groß ist, weil sich bei diesen Verhältnissen eine gute Relation zwischen Expandierbarkeit und Längenverkürzung beim Expandieren ergibt. Eine gesteigerte Flexibilität gegenüber Biegebeanspruchungen ergibt sich, wenn die Stranglänge der zweiten Gruppe 1,7 bis 1,9 mal so groß ist wie die Stranglänge der ersten Gruppe.It is advantageous if the strand length of the second group is 1.2 to 2.0 times as long as the strand length of the first group, in particular 1.3 to 1.5 times as large, because there is a good relationship between these conditions Expandability and length reduction when expanding results. An increased flexibility with respect to bending stresses results if the strand length of the second group is 1.7 to 1.9 times as long as the strand length of the first group.
Eine Anordnung mit guter Abdeckung der entstehenden Zwischenräume wird erreicht, wenn die mäanderförmigen Stränge der zweiten Gruppe Längsabschnitte aufweisen, die im nicht expandierten Zustand parallel zu der Mittenachse des Grundkörpers verlaufen. Außerdem ist für die Stabilität von Vorteil, wenn die mäanderförmigen Stränge der ersten Gruppe Umfangsabschnitte aufweisen, die im nicht expandierten Zustand in Umfangsrichtung des Grundkörpers' verlaufen.An arrangement with good coverage of the resulting gaps is achieved if the meandering strands of the second group have longitudinal sections which, in the unexpanded state, run parallel to the central axis of the base body. In addition, for the stability of advantageous if the meander-shaped strands of the first group have peripheral portions which extend in the unexpanded state in the circumferential direction of the body '.
Hierbei ergibt sich eine besonders vorteilhafte Konstruktion, wenn sich die Stränge der ersten Gruppe und die Stränge der zweiten Gruppe jeweils im Bereich der Längsabschnitte kreuzen, insbesondere dann, wenn die Umfangsabschnitte der ersten Gruppe mittig mit den Längsabschnitten der zweiten Gruppe verbunden sind. Ein sehr gleichmäßiges Öffnungsbild des Einsatzes im expandierten Zustand wird erreicht, wenn die Anzahl der sich periodisch wiederholenden Mäander eines Strangs der ersten Gruppe doppelt so groß ist wie die Anzahl der Mäander eines Strangs der zweiten Gruppe, wenn beispielsweise die Mäander der ersten Gruppe drei oder vier und die Mäander der zweiten Gruppe entsprechend sechs oder acht periodische Segmente aufweisen.This results in a particularly advantageous construction if the strands of the first group and the strands of the second group each intersect in the area of the longitudinal sections, in particular if the peripheral sections of the first group are connected centrally to the longitudinal sections of the second group. A very uniform opening pattern of the insert in the expanded state is achieved if the number of periodically repeating meanders of a strand of the first group is twice as large as the number of meanders of a strand of the second group, for example if the meanders of the first group are three or four and the meanders of the second group correspondingly have six or eight periodic segments.
Im folgenden ist anhand der Zeichnung ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:An exemplary embodiment of the invention is shown below with reference to the drawing. Show it:
Fig. 1: die abgewickelte Mantelfläche einer expandierbaren Gefäßstütze im nicht expandierten Zustand; sowie1: the developed lateral surface of an expandable stent in the unexpanded state; such as
Fig. 2: die Mantelfläche einer expandierbaren Gefäßstütze nach Fig. 1 im expandierten Zustand.2: the outer surface of an expandable stent graft according to FIG. 1 in the expanded state.
Die Figur 1 zeigt die abgewickelte Mantelfläche einer zylindrischen, rohrförmigen Gefäßstütze im nicht expandierten Zustand.FIG. 1 shows the developed lateral surface of a cylindrical, tubular stent in the unexpanded state.
Der Mantelabschnitt 1 ist in einer Draufsicht dargestellt, wobei der Ansicht zylindrische, rohrförmige Grundkörper entlang einer achsparallelen Schnittlinie 2 aufgeschnitten und eben ausgebreitet dargestellt ist. Die Mantelfläche ist gebildet von einer Anzahl von mäanderförmigen Materialsträngen 3a, b sowie 4a, b. Die Matrerialstränge 3a und 3b sind mäander- oder wellenförmig in Umfangrichtung des Einsatzes geschwungen, wobei sich nahezu halbkreisförmige Bogenabschnitte 5 und gerade, achsparallel verlaufende Längsabschnitte 6 abwechseln. Bei dem Ausführungsbeispiel gemäß Figur 1 ist die Stranglänge des umlaufenden Materialstrangs 3a bzw. 3b etwa 14,5 mm, was bei der dargestellten Gestaltung einen Durchmesser im nicht expandierten Zustand von 1,8 mm ergibt. Der mäanderförmig umlaufende Strang 3a bzw. 3b kann als periodisch wiederkehrende Form betrachtet werden, wobei jede Periode zwei Längsabschnitte 6 und zwei Bogenabschnitte 5 umfaßt. Bei diesem Ausführungsbeispiel sind also drei periodische Bereiche in Umfangsrichtung angeordnet.The jacket section 1 is shown in a plan view, the view showing the cylindrical, tubular base body being cut open along an axially parallel cutting line 2 and shown flatly spread out. The outer surface is formed by a number of meandering strands 3a, b and 4a, b. The material strands 3a and 3b are curved in a meandering or undulating manner in the circumferential direction of the insert, with almost semicircular arc sections 5 and straight longitudinal sections 6 running parallel to the axis alternating. In the exemplary embodiment according to FIG. 1, the strand length of the encircling material strand 3a or 3b is approximately 14.5 mm, which in the embodiment shown results in a diameter of 1.8 mm in the unexpanded state. The meandering strand 3a or 3b can be periodic recurring shape are considered, each period comprising two longitudinal sections 6 and two arc sections 5. In this exemplary embodiment, three periodic regions are thus arranged in the circumferential direction.
Die Materialstränge 4a und 4b sind ebenfalls mäanderförmig in Umfangsrichtung umlaufend angeordnet. Auch hier wechseln sich Bogenabschnitte 7 und Längsabschnitte 8 ab, wobei die Längsabschnitte 8 im nicht expandierten Zustand des Einsatzes etwa parallel zu den Längsabschnitten 6 der Materialstränge 3a und 3b verlaufen. Auch die Materialstränge 4a, 4b weisen eine Periodizität auf, wobei die Anzahl der Perioden bei diesem Ausführungsbeispiel doppelt so groß ist wie die Anzahl der Perioden der Materialstränge 3a, 3b. In der Figur 1 weist das Ausführungsbeispiel sechs periodische Abschnitte auf. Die Länge der Materialstränge 4a, 4b beträgt im vorliegenden Ausführungsbeispiel etwa 11 mm, was ebenfalls bei der vorliegenden Gestaltung zu einem Durchmesser von 1,8 mm führt.The material strands 4a and 4b are also arranged circumferentially in a meandering fashion. Here, too, arc sections 7 and longitudinal sections 8 alternate, the longitudinal sections 8 running approximately parallel to the longitudinal sections 6 of the material strands 3a and 3b in the unexpanded state of the insert. The material strands 4a, 4b also have a periodicity, the number of periods in this exemplary embodiment being twice as large as the number of periods of the material strands 3a, 3b. In the figure 1, the embodiment has six periodic sections. The length of the material strands 4a, 4b is approximately 11 mm in the present exemplary embodiment, which also leads to a diameter of 1.8 mm in the present design.
Die Materialstränge 3a und 3b durchsetzen sich bei dem vorliegenden Ausführungsbeispiel etwa mittig im jeweiligen Längsabschnitt 6 des Materialstrangs 3a, 3b. Die Materialstränge 4a, 4b durchsetzen dabei die Materialstränge 3a, 3b etwa rechtwinklig.In the present exemplary embodiment, the material strands 3a and 3b prevail approximately centrally in the respective longitudinal section 6 of the material strand 3a, 3b. The material strands 4a, 4b penetrate the material strands 3a, 3b approximately at right angles.
In der Praxis wird der erfindungsgemäße exp.andierbare Einsatz als einstückiges Element auf einem Rohr mit dem Außendurchmesser 1,8 mm geschnitten. Als Material kommt hier insbesondere implantatfähiger Edelstahl zum Einsatz, aber auch andere implantatfähige Materialien. Die Materialstärke in Radialrichtung ist über den gesamten Bereich des Einsatzes im wesentlichen konstant.In practice, the expandable insert according to the invention is cut as a one-piece element on a tube with an outside diameter of 1.8 mm. In particular, implantable stainless steel is used as the material, but also other implantable materials. The material thickness in the radial direction is essentially constant over the entire range of use.
In der Figur 2 ist ein Einsatz gemäß Figur 1 in dem zweiten, expandierten Zustand dargestellt. Der Durchmesser des Einsatzes im expandierten Zustand beträgt bei diesem Ausführungsbeispiel 3,5 mm. Die sich ergebende Verformung durch Anwendung einer von innen her radial wirkenden Kraft führt dazu, daß die Materialstränge 4a und 4b voll gestreckt sind, also in der Praxis einen Kreisring von 11 mm Umfang bilden. Die längeren Materialstränge 3a und 3b werden bei der vorliegenden Konfiguration zu wellenförmigen, nahezu sinusförmigen Materialsträngen verformt.FIG. 2 shows an insert according to FIG. 1 in the second, expanded state. The diameter of the Use in the expanded state is 3.5 mm in this embodiment. The resulting deformation by the application of a force acting radially from the inside leads to the material strands 4a and 4b being fully stretched, that is to say in practice forming a circular ring of 11 mm in circumference. In the present configuration, the longer material strands 3a and 3b are deformed into wavy, almost sinusoidal material strands.
Die Am expandierten Zustand kreisringförmigen Materialstränge 4a und 4b setzen einer gleichförmig von außen einwirkenden Radialkraft einen großen strukturellen Widerstand entgegen, der ein Kollabieren des Einsatzes im behandelnden Blutgefäß zuverlässig verhindert. Alternativ kann bei gleicher Widerstandskraft (Recoil) gegenüber den bekannten Einsätzen eine geringere Materialstärke verwendet werden. In beiden Fällen ist die Gefahr einer erneuten Querschnittsverengung des behandelnden Blutgefäßes, auch Re-Stenose genannt, geringer als bei den bekannten Einsätzen.The material strands 4a and 4b, which are annular in the expanded state, oppose a uniform radial force exerting a great structural resistance, which reliably prevents the insert from collapsing in the treating blood vessel. Alternatively, a lower material thickness can be used with the same resistance (recoil) compared to the known inserts. In both cases, the risk of a renewed narrowing of the cross-section of the treating blood vessel, also called re-stenosis, is lower than in the known applications.
Die Anwendung des Einsatzes in der Praxis ist im Prinzip bekannt.The application of the application in practice is known in principle.
Bei ihrer Verwendung werden die erfindungsgemäßen Einsätze mit einem Ballonkatheter in die zu behandelnden Blutgefäße eingeführt. Der Ballonkatheter wird durch Einpressen eines Fluids erweitert, woraufhin sich die Einsätze in radialer Richtung durch plastische Verformung dauerhaft ausdehnen.When used, the inserts according to the invention are inserted into the blood vessels to be treated with a balloon catheter. The balloon catheter is expanded by injecting a fluid, whereupon the inserts expand permanently in the radial direction due to plastic deformation.
Nach dem Entfernen des Ballonkatheters verbleibt der Einsatz im Blutgefäß und wir innerhalb kurzer Zeit von der Intima umschlossen.After removing the balloon catheter, the insert remains in the blood vessel and we are surrounded by the intima within a short time.
Es ist offensichtlich, daß auch andere Gestaltungen der die erfindungsgemäßen Vorteile bieten, so sind beispielsweise Ω- förmige Gestaltungen denkbar. It is obvious that other designs which offer the advantages according to the invention are also conceivable, for example Ω-shaped designs.

Claims

Patentansprüche claims
1. Expandierbarer Einsatz zur Verwendung als Gefäßstütze in 'Blutgefäßen, wobei der Einsatz durch Anwendung einer von innen nach außen gerichteten Radialkraft von einem nicht expandierten Zustand in einen expandierten Zustand plastisch verformbar ist, mit wenigstens einem im wesentlichen zylindrischen Grundkörperabschnitt, dessen Mantelfläche von einer Anzahl umlaufender mäanderförmiger Ringe gebildet ist, wobei die Ringe jeweils einen einstückigen Materialstrang mit einer bestimmten Stranglänge bilden, d a d u r c h g e k e n n z e i c h n e t , daß eine erste Gruppe von Ringen vorgesehen ist, deren Stranglänge im wesentlichen dem Umfang des Einsatzes im expandierten Zustand entspricht, und eine zweite Gruppe von Ringen vorgesehen ist, deren Stranglänge größer ist als der Umfang des Einsatzes im expandierten Zustand.1.Expandable insert for use as a vascular support in 'blood vessels, the insert being plastically deformable from an unexpanded state into an expanded state by using a radial force directed from the inside out, with at least one essentially cylindrical base body section, the lateral surface of which is of a number circumferential meandering rings is formed, the rings each forming an integral strand of material with a certain strand length, characterized in that a first group of rings is provided, the strand length of which essentially corresponds to the scope of use in the expanded state, and a second group of rings is provided is, the strand length is greater than the scope of use in the expanded state.
2. Einsatz nach Anspruch 1, dadurch gekennzeichnet, daß die Stranglänge der zweiten Gruppe 1,2 bis 2,0 mal so groß ist wie die Stranglänge der ersten Gruppe.2. Use according to claim 1, characterized in that the strand length of the second group is 1.2 to 2.0 times as large as the strand length of the first group.
3. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stranglänge der zweiten Gruppe 1,3 bis 1,5 mal so groß ist wie die Stranglänge der ersten Gruppe.3. Use according to one of the preceding claims, characterized in that the strand length of the second group is 1.3 to 1.5 times as long as the strand length of the first group.
4. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stranglänge der zweiten Gruppe 1,7 bis 1,9 mal so groß ist wie die Stranglänge der ersten Gruppe.4. Use according to one of the preceding claims, characterized in that the strand length of the second group Is 1.7 to 1.9 times the length of the first group.
5. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die mäanderförmigen Stränge der zweiten Gruppe Längsabschnitte aufweisen, die im nicht expandierten Zustand parallel zu der Mittenachse des Grundkörpers verlaufen.5. Use according to one of the preceding claims, characterized in that the meandering strands of the second group have longitudinal sections which, in the non-expanded state, run parallel to the central axis of the base body.
6. .Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die mäanderförmigen Stränge der ersten Gruppe Umfangsabschnitte aufweisen, die im nicht expandierten Zustand in Umfangsrichtung des Grundkörpers verlaufen.6. .Use according to one of the preceding claims, characterized in that the meandering strands of the first group have circumferential sections which run in the non-expanded state in the circumferential direction of the base body.
7. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich die Stränge der ersten Gruppe und die Stränge der zweiten Gruppe jeweils im Bereich der Längsabschnitte kreuzen.7. Use according to one of the preceding claims, characterized in that the strands of the first group and the strands of the second group each intersect in the region of the longitudinal sections.
8. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anzahl der Mäander je eines Strangs der ersten Gruppe doppelt so groß ist wie die Anzahl der Mäander des entsprechenden Strangs der zweiten Gruppe .8. Use according to one of the preceding claims, characterized in that the number of meanders each of a strand of the first group is twice as large as the number of meanders of the corresponding strand of the second group.
9. Einsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stränge der ersten Gruppe im expandierten Zustand des Einsatzes im wesentlichen zu einem Kreisring gestreckt sind. 9. Insert according to one of the preceding claims, characterized in that the strands of the first group are substantially stretched into a circular ring in the expanded state of the insert.
EP98930744A 1997-05-28 1998-05-28 Flexible expandable vascular support Withdrawn EP0944367A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722384A DE19722384A1 (en) 1997-05-28 1997-05-28 Flexible expandable stent
DE19722384 1997-05-28
PCT/EP1998/003148 WO1998053763A1 (en) 1997-05-28 1998-05-28 Flexible expandable vascular support

Publications (1)

Publication Number Publication Date
EP0944367A1 true EP0944367A1 (en) 1999-09-29

Family

ID=7830777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98930744A Withdrawn EP0944367A1 (en) 1997-05-28 1998-05-28 Flexible expandable vascular support

Country Status (5)

Country Link
US (1) US6190405B1 (en)
EP (1) EP0944367A1 (en)
AU (1) AU8107298A (en)
DE (2) DE19722384A1 (en)
WO (1) WO1998053763A1 (en)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7204848B1 (en) 1995-03-01 2007-04-17 Boston Scientific Scimed, Inc. Longitudinally flexible expandable stent
CA2192520A1 (en) 1996-03-05 1997-09-05 Ian M. Penn Expandable stent and method for delivery of same
WO1997032544A1 (en) * 1996-03-05 1997-09-12 Divysio Solutions Ulc. Expandable stent and method for delivery of same
US6796997B1 (en) 1996-03-05 2004-09-28 Evysio Medical Devices Ulc Expandable stent
US6033433A (en) 1997-04-25 2000-03-07 Scimed Life Systems, Inc. Stent configurations including spirals
US6558415B2 (en) 1998-03-27 2003-05-06 Intratherapeutics, Inc. Stent
US6132460A (en) * 1998-03-27 2000-10-17 Intratherapeutics, Inc. Stent
US6132461A (en) 1998-03-27 2000-10-17 Intratherapeutics, Inc. Stent with dual support structure
US6656215B1 (en) * 2000-11-16 2003-12-02 Cordis Corporation Stent graft having an improved means for attaching a stent to a graft
NZ510187A (en) * 1998-07-31 2003-08-29 Novo Rps Ulc Small vessel expandable stent and method for production of same
US6254564B1 (en) 1998-09-10 2001-07-03 Percardia, Inc. Left ventricular conduit with blood vessel graft
EP1027870B1 (en) * 1999-01-12 2005-03-30 Orbus Medical Technologies, Inc. Expandable intraluminal endoprosthesis
EP1020166A1 (en) * 1999-01-12 2000-07-19 Orbus Medical Technologies, Inc. Expandable intraluminal endoprosthesis
US6254631B1 (en) 1999-09-23 2001-07-03 Intratherapeutics, Inc. Stent with enhanced friction
US6423090B1 (en) 2000-02-11 2002-07-23 Advanced Cardiovascular Systems, Inc. Stent pattern with staged expansion
DE10010074B4 (en) * 2000-02-28 2005-04-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for fastening and anchoring heart valve prostheses
DE10050940A1 (en) * 2000-10-10 2002-04-11 Biotronik Mess & Therapieg Coronary stent has outer casing with tubular body consisting of annular support sections, arm elements, connecting arms and turning points
US6626935B1 (en) 2000-12-21 2003-09-30 Advanced Cardiovascular Systems, Inc. Intravascular stent
US6942689B2 (en) * 2001-03-01 2005-09-13 Cordis Corporation Flexible stent
US6679911B2 (en) 2001-03-01 2004-01-20 Cordis Corporation Flexible stent
US6790227B2 (en) * 2001-03-01 2004-09-14 Cordis Corporation Flexible stent
AU784552B2 (en) * 2001-03-02 2006-05-04 Cardinal Health 529, Llc Flexible stent
US6602283B2 (en) * 2001-04-06 2003-08-05 Scimed Life Systems, Inc. Stent design
US7520892B1 (en) 2001-06-28 2009-04-21 Advanced Cardiovascular Systems, Inc. Low profile stent with flexible link
US6607554B2 (en) 2001-06-29 2003-08-19 Advanced Cardiovascular Systems, Inc. Universal stent link design
US7354450B2 (en) * 2002-01-30 2008-04-08 Boston Scientific Scimed, Inc. Stent with wishbone connectors and serpentine bands
US7179286B2 (en) * 2003-02-21 2007-02-20 Boston Scientific Scimed, Inc. Stent with stepped connectors
US7247166B2 (en) * 2003-09-29 2007-07-24 Advanced Cardiovascular Systems, Inc. Intravascular stent with extendible end rings
DE102005003632A1 (en) 2005-01-20 2006-08-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Catheter for the transvascular implantation of heart valve prostheses
US20130150943A1 (en) 2007-01-19 2013-06-13 Elixir Medical Corporation Biodegradable endoprostheses and methods for their fabrication
US8182890B2 (en) 2007-01-19 2012-05-22 Elixir Medical Corporation Biodegradable endoprostheses and methods for their fabrication
US8814930B2 (en) 2007-01-19 2014-08-26 Elixir Medical Corporation Biodegradable endoprosthesis and methods for their fabrication
US7896915B2 (en) 2007-04-13 2011-03-01 Jenavalve Technology, Inc. Medical device for treating a heart valve insufficiency
US8216209B2 (en) 2007-05-31 2012-07-10 Abbott Cardiovascular Systems Inc. Method and apparatus for delivering an agent to a kidney
US9364586B2 (en) * 2007-05-31 2016-06-14 Abbott Cardiovascular Systems Inc. Method and apparatus for improving delivery of an agent to a kidney
US9144509B2 (en) * 2007-05-31 2015-09-29 Abbott Cardiovascular Systems Inc. Method and apparatus for delivering an agent to a kidney
US9149610B2 (en) 2007-05-31 2015-10-06 Abbott Cardiovascular Systems Inc. Method and apparatus for improving delivery of an agent to a kidney
ES2903231T3 (en) 2008-02-26 2022-03-31 Jenavalve Tech Inc Stent for positioning and anchoring a valve prosthesis at an implantation site in a patient's heart
US9044318B2 (en) 2008-02-26 2015-06-02 Jenavalve Technology Gmbh Stent for the positioning and anchoring of a valvular prosthesis
CA2799459A1 (en) 2010-05-25 2011-12-01 Jenavalve Technology Inc. Prosthetic heart valve and transcatheter delivered endoprosthesis comprising a prosthetic heart valve and a stent
EP2710984B1 (en) * 2012-09-19 2015-08-26 Biotronik AG Implant and system formed of a balloon catheter and implant
JP6563394B2 (en) 2013-08-30 2019-08-21 イェーナヴァルヴ テクノロジー インコーポレイテッド Radially foldable frame for an artificial valve and method for manufacturing the frame
US9855156B2 (en) 2014-08-15 2018-01-02 Elixir Medical Corporation Biodegradable endoprostheses and methods of their fabrication
US9259339B1 (en) 2014-08-15 2016-02-16 Elixir Medical Corporation Biodegradable endoprostheses and methods of their fabrication
US9730819B2 (en) 2014-08-15 2017-08-15 Elixir Medical Corporation Biodegradable endoprostheses and methods of their fabrication
US9480588B2 (en) 2014-08-15 2016-11-01 Elixir Medical Corporation Biodegradable endoprostheses and methods of their fabrication
US9381103B2 (en) * 2014-10-06 2016-07-05 Abbott Cardiovascular Systems Inc. Stent with elongating struts
EP3632378A1 (en) 2015-05-01 2020-04-08 JenaValve Technology, Inc. Device and method with reduced pacemaker rate in heart valve replacement
WO2017195125A1 (en) 2016-05-13 2017-11-16 Jenavalve Technology, Inc. Heart valve prosthesis delivery system and method for delivery of heart valve prosthesis with introducer sheath and loading system
US11622872B2 (en) 2016-05-16 2023-04-11 Elixir Medical Corporation Uncaging stent
JP6963566B2 (en) 2016-05-16 2021-11-10 エリクシアー メディカル コーポレイション Uncaging stent
CN110392557A (en) 2017-01-27 2019-10-29 耶拿阀门科技股份有限公司 Heart valve simulation

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102417A (en) * 1985-11-07 1992-04-07 Expandable Grafts Partnership Expandable intraluminal graft, and method and apparatus for implanting an expandable intraluminal graft
CA1322628C (en) * 1988-10-04 1993-10-05 Richard A. Schatz Expandable intraluminal graft
US5507771A (en) * 1992-06-15 1996-04-16 Cook Incorporated Stent assembly
DE4219949A1 (en) * 1992-06-18 1993-12-23 Angiomed Ag Stent for holding open stenosis in blood vessel - has basic body, into which is inserted helical coil and incorporated into mesh, body and coil being of same material
GB2281865B (en) * 1993-09-16 1997-07-30 Cordis Corp Endoprosthesis having multiple laser welded junctions,method and procedure
WO1995009586A1 (en) * 1993-10-01 1995-04-13 Emory University Self-expanding intraluminal composite prosthesis
DE4333836C2 (en) * 1993-10-05 1998-07-02 Angiomed Ag Device for bridging a bag
US5643312A (en) * 1994-02-25 1997-07-01 Fischell Robert Stent having a multiplicity of closed circular structures
JP3129327B2 (en) * 1994-04-01 2001-01-29 プログラフト メディカル,インコーポレイテッド Self-expandable stents and stent-grafts and methods of using them
JP3505603B2 (en) * 1995-03-01 2004-03-08 サイメド ライフ システムズ,インコーポレイテッド Longitudinal flexible expandable improved stent
US6176872B1 (en) * 1995-08-15 2001-01-23 Ethicon, Inc. Radial strength stent
CA2192520A1 (en) * 1996-03-05 1997-09-05 Ian M. Penn Expandable stent and method for delivery of same
DE19634241A1 (en) * 1996-08-24 1998-02-26 Starck Erhard Prof Dr Support for blood vessels
US5868781A (en) * 1996-10-22 1999-02-09 Scimed Life Systems, Inc. Locking stent
US5964798A (en) * 1997-12-16 1999-10-12 Cardiovasc, Inc. Stent having high radial strength
US6077296A (en) * 1998-03-04 2000-06-20 Endologix, Inc. Endoluminal vascular prosthesis
US6019789A (en) * 1998-04-01 2000-02-01 Quanam Medical Corporation Expandable unit cell and intraluminal stent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9853763A1 *

Also Published As

Publication number Publication date
US6190405B1 (en) 2001-02-20
DE19880674D2 (en) 1999-11-25
AU8107298A (en) 1998-12-30
DE19722384A1 (en) 1998-12-03
WO1998053763A1 (en) 1998-12-03

Similar Documents

Publication Publication Date Title
WO1998053763A1 (en) Flexible expandable vascular support
EP0878174B1 (en) Coronary stent
DE69936047T2 (en) STENT
EP0888757B1 (en) Intraluminal implant
EP0900063B1 (en) Stent
EP0711135B2 (en) Stent
DE19753123B4 (en) stent
EP0879584B2 (en) Coronary stent
EP1011534B1 (en) Stent for transluminal implantation
EP1430854B1 (en) Stent
EP1670392A2 (en) Stent with improved durability
EP0734698A2 (en) Stent for transluminal implantation into hollow organs
WO2000016718A1 (en) Tubular endoprosthesis
EP1197189B1 (en) Stent
DE10050970A1 (en) Coronary stent has tubular body with support sections, arm elements connected by connecting elements.
EP1555959B1 (en) Stent to be implanted within or around a hollow organ
EP0934036B1 (en) Stent
EP2895117B1 (en) Stent
EP0444077B1 (en) Hair curler
DE19611755A1 (en) Expandable blood vessel implant
EP0884987B1 (en) Expandable intraluminal device
DE102016117398B4 (en) Expandable structure
DE19541661A1 (en) Blood vessel support trellis
WO2001091669A2 (en) Stent
DE20314394U9 (en) Stent with improved durability

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990624

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20031121