DE102005037863B4 - Tubular supporting prosthesis with laterally overlapping curvature arches - Google Patents

Tubular supporting prosthesis with laterally overlapping curvature arches

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Publication number
DE102005037863B4
DE102005037863B4 DE102005037863.3A DE102005037863A DE102005037863B4 DE 102005037863 B4 DE102005037863 B4 DE 102005037863B4 DE 102005037863 A DE102005037863 A DE 102005037863A DE 102005037863 B4 DE102005037863 B4 DE 102005037863B4
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DE
Germany
Prior art keywords
curvature
support ring
characterized
prosthesis
supporting prosthesis
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.)
Active
Application number
DE102005037863.3A
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German (de)
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DE102005037863A1 (en
Inventor
Dr. Fliedner Thilo
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.)
CIVELLI, CARLO, SG
Original Assignee
Carlo Civelli
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Publication date
Application filed by Carlo Civelli filed Critical Carlo Civelli
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Publication of DE102005037863A1 publication Critical patent/DE102005037863A1/en
Application granted granted Critical
Publication of DE102005037863B4 publication Critical patent/DE102005037863B4/en
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Anticipated expiration legal-status Critical

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    • 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
    • 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
    • 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
    • A61F2002/91508Stents 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 the meander having a difference in amplitude along the band
    • 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
    • A61F2002/91516Stents 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 the meander having a change in frequency along the band
    • 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
    • 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
    • A61F2002/91583Adjacent bands being connected to each other by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
    • 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0004Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
    • A61F2250/0007Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting length

Abstract

Tubular support prosthesis (1) for vessels or intercorporeal lumina having at least two expandable support rings (2.1 - 2.7, 10.1, 10.2) arranged side by side and connected to one another at at least one connection point (3), each extending from one meandering to a plurality Curvature curves (5.1 - 5.6, 6.1 - 6.6) wound filament (4) are formed, each curvature arc (5.1-5.6, 6.1-6.6) a first leg (9.1), a second leg (9.2) and between these legs ( 9.1, 9.2), characterized in that one limb of at least one first arc of curvature (5.1) of a first support ring (2.1) and one limb of a curvature arc (6.2) of an adjacent second support ring (2.2) overlap laterally and in the overlapping area the connection point (3) is formed; wherein parts of the legs (9.1, 9.2) of the curvature arcs overlap in the overlapping area together with the vertex section (9.3), and the overlapping curvature arches (5.1, 6.2) in the overlapping area have a common filament section (7) forming the connection point (3) ; wherein a first support ring (2.1) circumferentially alternately on one side with an adjacent second support ring (2.2) and on the other side with a further adjacent third support ring (2.3) is connected.

Description

  • The present invention relates to a tubular support prosthesis, in particular a vascular stent, for vessels or intracorporeal lumens with at least two juxtaposed and interconnected at least one connection point, expandable support rings, which are each formed by a meandering wound into a plurality of curvature filaments.
  • Such a supporting prosthesis is for example from the DE 295 21 206 U1 known. The so-called "stent" described there has a plurality of juxtaposed support rings, each consisting of a uniform, formed into a meander pattern filament. Some of the curvature arcs or loops of the meander pattern of a support ring are connected via likewise loop-shaped connector with associated curved arches of an adjacent support ring. Due to the loop shape of the connectors, they lengthen when the vascular stent is expanded so that the length shrinkage created by the expansion of the support rings is compensated for again and the vascular stent retains substantially its original length. The meandering shape and the shape and arrangement of the connectors are chosen so that the individual curvature arches or loops do not flare up during the expansion of the vascular stent, which could lead to an unnecessary injury to the vessel wall. Usually, the vascular stents are brought to the target site by means of a catheter, where they are expanded by means of a balloon (balloon catheter) in the vessel by stretching the interconnected support rings to the necessary lumen and the necessary diameter to support the vessel.
  • DE 297 02 671 U1 concerns a stent. US 6136023 A relates to a welded sine wave stent. WO 99/44535 A1 concerns an intraluminal stent. WO 99/44543 A1 relates to a stent with improved cell configuration. WO 02/060344 A2 relates to a longitudinally flexible expandable stent. WO 01/15751 A1 relates to a multi-layered material containing a biologically active agent and its preparation.
  • In prior art stents, however, it is difficult to meet the various requirements by properly shaping the backup rings and connectors simultaneously. Measures that cause a minimum longitudinal shrinkage during expansion, do not always lead to a desired stability against erecting the curvature curves of the meandering shape. In addition, vascular stents are often provided with coatings to improve the compatibility. Such coatings must be able to participate in part extreme deformation during expansion of the vascular stent.
  • The object of the invention is now to provide a tubular supporting prosthesis of the type mentioned, the improved properties in terms of reduced Aufrichtneigung the bends, preferably preferred largely avoiding voltage spikes having.
  • This object is achieved according to the invention in a tubular support prosthesis for vessels or intercorporeal lumina with at least two along a supporting prosthesis longitudinal axis arranged side by side and at least one connection point interconnected expandable support rings, each formed by a meandering to a plurality of curved curves filament, each arc of curvature a first Leg, a second leg and having between these legs extending apex portion. In this case, one leg of at least one first arc of curvature of a first support ring and one leg of a curvature arc of an adjacent second support ring overlap laterally. The connection point is formed in the overlapping area. Parts of the legs of the curvature arches also overlap in the overlapping area together with the vertex section, and the overlapping curvature arcs have a common filament section in the overlapping area, which forms the connection point. A first support ring is circumferentially alternately connected on one side with an adjacent second support ring and on the other side with a further adjacent third support ring.
  • So far, the support rings have always been arranged side by side and have touched only in the range of some apex of curvature to make a connection. Mostly, however, they are spaced and interconnected by specially shaped connectors. The overlap according to the invention is based in each case on the shortest distance between two circumferential center lines of the adjacent support rings. The total width of a support ring (measured perpendicular to this center line) must therefore be greater than the distance between these two centerlines. By this definition, an apparent overlap in obliquely arranged or elliptically encircling support rings should be excluded. The overlap ensures that the adjacent support rings are almost interlocked with each other and prevent the curvature arcs at the joints in the curvature region each other to a setting up of the curvature arcs during the expansion process. Furthermore, by such a measure voltage spikes in the connection area opposite Conventional vascular stent can be reduced, so that this structure is very well suited for coatings. Preferably, the vessel stents are produced from a tube blank in which the meander-shaped support rings or that these filaments are lasered out of the solid material and subsequently electropolished. By such a manufacturing method extremely filigree, net-like structures can be produced.
  • The overlapping curvature arcs have a common filament section in the overlap region, which forms the connection point. Accordingly, the connector is part of the curvature arcs themselves, where these overlapping curvature arcs touch each other. The overlap area then exerts a direct influence on the deformation of the curvature arcs when the vessel stent is expanded. Previously used connectors should exhibit their own deformation properties as independent as possible of the curvature arcs, or merely serve to fix two adjacent curvature arcs vertices to each other. The design variant according to the invention results in a much more complex deformation process, which, however, ultimately leads to an improvement in the Aufdehnverhaltens of the vascular stent.
  • One embodiment provides that a circumferential annular center line of a support ring is arranged substantially in a cross-sectional plane extending perpendicular to the support prosthesis main axis. The circumferential annular center line is arranged centrally between the two end faces of a support ring, so that at least the vertices of the curvature arcs overlapping with other curvature arcs of adjacent support rings have an equidistant distance to this center line. If this center line is arranged in a cross-sectional plane extending perpendicularly to the main axis of the supporting prosthesis, the supporting rings run in a circular or straight manner and not obliquely or elliptically around the main supporting prosthesis axis. As a result, additional force components that would occur in an oblique arrangement of the support rings are avoided.
  • Furthermore, the meander shape of the filament of a support ring may have at least two different curvature arc shapes that together form a recurring pattern of the meander shape. Here one could also speak of a periodically circulating sequence. While uniform meander patterns are used in the conventional vessel stents, an irregular pattern due to different curvature arc shapes is used in the inventive vessel stent, so that the period is larger. This allows a greater influence on the deformation behavior during expansion within a certain range. In particular, when narrower and wider curved arches and longer and shorter curved arches are used, a targeted stepwise expansion of the vascular stent can be performed.
  • Furthermore, advantageously, a prosthesis window formed between two overlapping regions connected to one another can have a first frame half formed by the first support ring and a second frame half formed by the adjacent second support ring, wherein both frame halves are configured point-symmetrical to one another. If an irregular meandering shape is chosen, a point symmetry of the window frame half leads to the same expansion properties but in the opposite direction, resulting in a homogenization of the expansion properties.
  • So that the connection points counteract as far as possible a shrinkage of the length of the vascular stent during the expansion process, it is provided in one embodiment that the common filament section is inclined in the overlapping region at an angle α of greater than 0 °, preferably greater than 10 °, relative to a parallel of the main supporting prosthesis axis. The inclination ensures that the connecting region pivots when the vessel stent expands, in particular, moves toward an angle in the region of 90 °. As a result, a reduction in length is counteracted.
  • In this context, with regard to a reduced change in length, an embodiment has proven to be advantageous in which the angle α at at least one overlap region 15 ° - 25 ° and 165 ° to 155 ° in the other overlap regions. Both angles are measured from the same reference line, which is why it is possible to speak of a counter-directional inclination of the overlapping area, so that in part the overlapping areas straighten when expanding clockwise and partly counterclockwise, which in turn leads to a homogenization of the expansion.
  • Preferably, the common filament portions of the overlapping areas between two adjacent support rings are all inclined in the same direction. Due to this constructional measure, the length change ratios by the erecting of the overlapping areas in the expansion process on one side of a support ring are the same. According to another embodiment, it may furthermore be provided that the common filament sections of the overlapping region on the one side of a support ring in the opposite direction to the Overlap areas of the other side of the same support ring are inclined. The overlapping areas on the opposite sides of a support ring pivot towards each other during the expansion process, so that a part of the expansion stresses is reduced again.
  • A homogenization of the voltage situation can be achieved in particular in a variant in that a support ring is circumferentially alternately connected on one side with an adjacent support ring and on the other side with a further adjacent support ring. Accordingly, a support ring is connected between two circumferentially successively arranged overlapping regions on the other side with a further support ring. The joints or overlapping areas thus change zigzag the side along the circumference of a support ring.
  • The toothing of the support rings into each other can be chosen favorably so that the ratio of the length of the overlap region, seen in the longitudinal direction of the supporting prosthesis, to the width of the support ring is greater than 0.1, preferably greater than 0.2. As a rule, this ensures that not only the vertex areas of the curvature arcs overlap, but also parts of the legs of the arcs of curvature form the overlapping area. This embodiment has a positive influence on the deformation behavior and counteracts in particular a setting up of the curvature arcs during the expansion process.
  • Furthermore, each arc of curvature may comprise a first leg, a second leg, and a crown portion extending between these legs, the first and second legs being curved in the same direction. Such an additional curvature, so that the curvature curves form the outline of a fin or claw shape, is hitherto uncommon. This design measure is mainly used to equalize the Aufdehnverhaltens of the vascular stent. A related additional embodiment provides that the first and second legs of the curvature arcs of a support ring are curved in the same direction and the first and second legs of the curvature arcs of the adjacent support rings are curved in the opposite direction. This results in a homogenization of the Aufdehnverhaltens again, since the effect achieved by this form unfolds in both directions. Moreover, this measure leads to the fact that the longest possible overlap area can be formed without the space requirement becoming too great.
  • By means of a further embodiment, a coating which comprises silicon dioxide can be provided on the filament. Accordingly, therefore, a glass-like coating can be provided. The silica may be in amorphous or crystalline or semi-crystalline form.
  • The properties of the coating may be further modified by at least one admixture contained in the coating, which admixture may be selected from alumina, titania, calcium compounds, sodium oxide, ground oxide, magnesia, selenium oxide and hydroxides, especially hydroxides of the aforementioned metals , Particularly preferred admixtures are alumina and titania.
  • When an admixture of silica is used, the proportion of the admixture in the total amount of the coating may preferably be 0.5 to 50% by weight.
  • In order to maintain the desired surface property over the entire surface of the supporting prosthesis, it is preferred that the coating be substantially free of pores.
  • In certain embodiments, however, it may also be preferred that the coating has pores for functionalization with other substances that are applied to the coating after the actual coating and deposit in the pores. Accordingly, the coating may have an additional, even partially or punctually existing functionalization order. Such an order may correspond to the medical purpose of the supporting prosthesis and may involve affecting the growth of surrounding tissue, killing unwanted tissue, establishing a relationship between the supporting prosthesis and tissue, etc. The functionalization order may contain, for example, at least one drug and / or at least one cell poison.
  • A great advantage of the supporting prosthesis according to the invention is the fact that the coating can be applied extremely thin, namely preferably in the nano-range, ie in the range of a few atomic layers, which allows to set the final dimensions substantially in the production of the supporting prosthesis, without having to take account of possibly not exactly foreseeable dimensioning changes through the coating. The thickness of the coating according to the invention is preferably 0.1 to 1000 nm. It is understood, however, that both thinner and thicker coatings are possible. Decisive in the choice of the layer thickness is the requirement that upon expansion of the supporting prosthesis in the body, the coating is not damaged and no additional pores arise.
  • The coating may be applied in a single step, thus forming a monolayer, but in a preferred embodiment may also consist of a plurality of successively applied layers. In multi-layer application, the composition of each individual layer can be determined individually. The supporting prosthesis comprises a carrier forming the basic structure, which is at least partially provided with the coating.
  • The support is preferably constructed of a material which is difficult to disassemble, with the term "poorly degradable" being understood to mean a property in which the material, after implantation into a body, does not show any visible degradation phenomena for at least one year.
  • The support of the supporting prosthesis may include conventional materials such as carbon, PTFE, Dakron, metal alloys or PHA, in particular steel alloys are preferred materials.
  • Preferably, the metal alloys usable for the carrier are selected from the group of stainless steels.
  • Another preferred material for the wearer is a shape memory metal, especially nickel-titanium alloy, which find use in such supportive prostheses due to their ability to independently change the shape.
  • A method for producing the supporting prosthesis may comprise the following steps:
    • - Providing a carrier forming the basic structure; and
    • Applying a silicon dioxide-containing coating by means of a plasma coating process.
  • In order to obtain the desired pores for receiving functionalizing agents in certain embodiments, it is further preferred that the method comprises a step of generating pores in the coating by means of neutron bombardment. Neutron sources such as particle accelerators can be used for this purpose. Another variant for generating functional pores is to produce the pores by means of laser light.
  • The coating described above, due to its inert glassy surface with silicon dioxide, largely prevents the growth of cells of the body or the adhesion of such cells, because due to their hardness, it counteracts damage when the supporting prosthesis is introduced into the body, thereby simplifying the handling due to the thinness of the coating allows a simple design of the supporting prosthesis. Furthermore, it has a reduced friction due to lower roughness values and thus a smaller load for blood components and lower coagulum formation, wherein there is no degradation of the coating even after a longer retention time.
  • In a further embodiment, it is provided that each arc of curvature has a point of smallest cross section and the filament tapers continuously at least in sections to the point of the smallest cross section. Due to a tensile load in the meander pattern, the deformation of the curvature arcs at the respective points of the same cross section begins almost simultaneously and then continues continuously into the other regions of the curvature arcs. In particular, the continuous taper of the curvature arcs to the point of least cross section prevents the stretching movement of the meander pattern initially leading to the extension of individual curvature arcs. The reason for this is that, prior to complete stretching of a curve of curvature, the deformation of an adjacent curve of curvature begins at the point of the smallest cross-section. As a result, a uniform expansion of the supporting prosthesis is made possible.
  • Furthermore, a location of the smallest cross-section of a curve of curvature can be arranged apart from a center line of the curve of curvature. The point smallest cross-section can be located in the region of the apex of the arc of curvature.
  • For the sake of completeness, it should be mentioned that when using a plurality of juxtaposed support rings, the two respective outer support rings may have at least outwardly directed curvature arches which are evened out, so that the vertices of these curvature arcs lie in one plane and none of the curvature arcs outstands.
  • In the following the invention will now be explained in more detail with reference to a drawing. Show it:
    • 1 a schematic representation of a supporting prosthesis with four support rings,
    • 2 a schematic representation of a development of a first embodiment of a supporting prosthesis,
    • 3 a schematic view of a development of a second embodiment of a supporting prosthesis,
    • 4 a schematic view of a development of a third embodiment of a supporting prosthesis,
    • 5 a true-to-scale view of a development of a fourth embodiment of a supporting prosthesis,
    • 6 an enlarged view of a vertex area of a curve of curvature according to another variant,
    • 7 a cross section of the arc of curvature 6 along the section line VII-VII,
    • 8th a cross section through the arc of curvature 6 along the section line VIII-VIII,
    • 9 a cross section through the arc of curvature 6 along the section line IX-IX, and
    • 10 similar to the cross section 9 in a variant with coating.
  • Based on 1 In the following, the basic structure will be explained with reference to a schematic representation. For reasons of simplification, fine structures are shown over the entire surface and the individual meander shapes or filaments can not be recognized.
  • In the 1 tubular support prosthesis shown 1 includes four adjacent support rings 2.1 . 2.2 . 2.3 , and 2.4, over between the support rings 2.1 - 2.4 arranged connection points 3 connected to each other. In the present example, two connection points between the individual support rings 2.1 - 2.4 arranged.
  • The supporting prosthesis 1 is by means of a balloon catheter from the in 1 shown expandable position in an expanded position. For this purpose, each support ring 2.1 - 2.4 a in 1 not shown filament, which meanders in a meandering manner. This meandering shape gives each support ring 2.1 - 2.4 the corresponding expansion properties. The connection points 3 be, as will be described in more detail below, by overlapping curves of curvature of adjacent support rings 2.1 - 2.4 educated. In 1 are also the circumferential center lines M of the support rings 2.1 - 2.4 located.
  • Based on 2 to 4 In the following, schematic development examples of the meander shapes of the in 1 illustrated supporting prosthesis explained in more detail. As in 1 are in 2 four support rings 2.1 - 2.4 (shown in the development as flat-lying bands) arranged side by side. The development shows the entire circumference of the supporting prosthesis 1 ,
  • Every support ring 2.1 - 2.4 consists of a meandering filament 4 that in the 2 for simplicity's sake, shown as a dash, but represents a three-dimensional thin and narrow band in the concrete application. In the present example, the support ring 2.1 six in the direction of the second support ring 2.2 directed arcs of curvature 5.1 - 5.6 on. While the curvature arcs 5.1 . 5.3 . 5.4 and 5.6 ending in the same height, are the curvature arches 5.2 and 5.5 about this over. The support ring 2.2 points six towards the first support ring 2.1 directed arcs of curvature 6.1 - 6.6 on. While the curvature arcs 6.1 . 6.2 . 6.4 and 6.5 at the same height and at a distance to the first support ring 2.1 ends, are the curvature arches 6.3 and 6.6 overlap on this page and overlap the associated curvature bends 5.2 and 5.5 of the first support ring 2.1 corresponding. The overlapping takes place such that at the same time a connection takes place in the overlapping area, so that the connection point 3 is formed. A small filament section 7 is both curvature arcs 5.2 and 6.3 respectively. 5.5 and 6.6 assigned together. The cross section of the common filament section 7 is substantially unchanged from the remainder of the arc of curvature so as to avoid accumulation of material as much as possible.
  • The width B 1 of the support ring 2.1 is in the present example about 2.5 mm and the length L Ü of the overlap region or common filament portion 7 0.3125 mm. Therefore, the ratio V between L Ü and B 1 in the present case is 0.125.
  • The curvature bows 5.1 . 5.2 and 5.3 form a periodically repeating pattern with the period P. In the present case, this pattern comes twice on the circumference of the supporting prosthesis 1 before, so that the curvature arches 5.4 . 5.5 and 5.6 represent the same meander shape and size. The support ring 2.2 is substantially equal to the support ring 2.1 configured, but arranged out of phase. The support ring 2.3 is again in phase with the support ring 2.1 arranged and designed identically. The support ring 2.4 is in phase and identical to the support ring 2.2 designed.
  • Between the two connection points 3 the support rings 2.1 and 2.2 each is a prosthetic window 8th formed, one substantially from the first support ring 2.1 formed frame half 8.1 and one substantially from the second support ring 2.2 formed frame half 8.2 having. The frame halves 8.1 and 8.2 are designed point-symmetrical to each other. Two of these prosthetic windows each 8th are between the first and second support ring 2.1 and 2.2 arranged. The same applies to corresponding prosthetic windows 8th between the second and third support ring 2.2 and 2.3 and the third and fourth support rings 2.3 and 2.4 ,
  • Exemplary is based on the support ring 2.4 described that each arc of curvature a first leg 9.1 , a second leg 9.2 and a vertex area connecting them together 9.3 includes. In the present example, all curvature arches have an equal width and the legs 9.1 and 9.2 are substantially parallel to the axis of a prosthesis main axis A. Thus, the common filament extends 7 essentially parallel to the axis. For the sake of simplicity, in the present example, the vertex area 9.3 just shown; However, this is usually formed by a transition arc. From the 2 It is very nice to see that in the present example, all curvature arcs have the same width. After it at the 2 is a schematic representation, at which the basic principle is to be made clear, should be understood that in practice usually no sharp transitions between individual curvature arc sections are designed, but transitions in the form of radii or arc sections are used. Will the in 2 shown structure wound into a tube shape or worked out of a tube, this can be expanded in subsequent steps. After the common filament sections 7 have a slightly different deformation behavior than the remaining curvature arches, these pivot during expansion such that the support rings 2.1 - 2.4 be pushed apart in the axial direction, while they increase in size. This substantially maintains the length. Desired is a maximum change in length of 5%.
  • The following is based on he 3 another embodiment explained in more detail. In the following, only the essential differences will be discussed. As far as identical or functionally identical elements are used, the same reference numerals are used. Otherwise, reference is made to the above description.
  • The main difference is that the meander shape has three different curvature forms within one period. The curvature bows 5.1 . 5.2 and 5.3 each have a different width, so that results in a slightly more irregular structure. All other parameters described above remain essentially the same. For example, the prosthetic windows 8th continue with respect to their two frame halves 8.1 and 8.2 designed point-symmetrical, the support rings 2.1 and 2.3 are in phase and configured identically, the support rings 2.2 and 2.4 are in phase and identical configured etc.
  • Also with regard to the embodiment according to the 4 will only discuss the essential differences from the previous embodiments. Therefore, the same reference numerals are again used here for the same and functionally identical components and referred to the above description.
  • In contrast to the embodiment of the 3 are next to the different widths of the three curvature arches 5.1 . 5.2 and 5.3 in one phase still additionally sloping legs 9.1 and 9.2 provided by some curvature arcs (eg 5.1 and 6.2). This is the common filament section 7 in the transition region obliquely aligned, and at an angle α, in the present example between the first and second support ring 2.1 and 2.2 about 5 ° and between the support rings 2.2 and 2.3 about 175 °. Measurements are made relative to a reference line, which is a parallel to the prosthesis main axis A. The orientation of the common filament sections 7 between the first and second support ring 2.1 and 2.2 is opposite to the orientation of the common filament sections 7 between the second support ring 2.2 and third support ring 2.3 , In addition, as in the previous embodiments, the connection points 3 between the second support ring 2.2 and the third support ring 2.3 between the joints 3 of the first support ring 2.1 and the second support ring 2.2 arranged. By this configuration, the common filament sections pivot 7 when stretching the supporting prosthesis 1 in the opposite direction. Furthermore, these are easier to pivot than the axis-parallel alignment according to the 2 and 3 , As a result, a homogenization is achieved again. Also by the different widths of the curvature arcs results in a metered, possibly also stepwise expansion.
  • Based on 5 now the currently preferred embodiment is explained in more detail. Again, as far as possible resorted to the above description and the same reference numerals used for similar and functionally identical components.
  • So that the ends of the supporting prosthesis 1 are formed as uniformly as possible, each is a Endstützring 10.1 and 10.2 intended. In these Endstützringen all curves that protrude to the front end at the same height. In this respect meets the end support ring 10.1 not all symmetry criteria, as in the previous examples. In total there are seven support rings 2.1 - 2.7 available. Also the end support ring 10.2 does not meet all the symmetry criteria with respect to the last support ring 2.7 , The support rings 2.1 . 2.3 . 2.5 and 2.7 are in phase and configured identically. The same applies to the support rings 2.2 . 2.4 and 2.6 , which are also configured in phase and identical to each other. Both the thighs 9.1 and 9.2 as well as the vertex areas 9.3 are curved in the present example. At the support ring 2.1 the curvature of the legs takes place 9.1 and 9.3 such that the convex sides in the 5 point down and the concave sides upwards. Accordingly, all the curves are curvatures 5.1 - 5.6 curved in the same direction and represent in their contour substantially a claw or fins shape. The ratio V of L Ü and B 1 in the present case is 0.265, wherein B 1 about 2.54 mm and L Ü about 0 , 69 mm.
  • The second support ring 2.2 is designed so that the thighs 9.1 and 9.2 the curvature arcs 6.1 - 6.6 with its convex side in the 5 point upwards and with their concave side downwards and thus are curved opposite to the curvature arcs 5.1 - 5.6 of the support ring 2.1 , This again results in a point symmetry of the prosthetic window 8th , Overall, therefore, are three different arcs of curvature (eg 5.1, 5.2 and 5.3) in each case one of the support rings 2.1 - 2.7 available.
  • The angle α is between the support rings 2.1 and 2.2 , such as 2.3 and 2.4 . 2.5 and 2.6 each 25 ° or between the support rings 2.2 and 2.3 , such as 2.4 and 2.5 and 2.6 and 2.7 each 155 °. The connection points 3 between the first support ring 2.1 and the end support ring 10.1 as well as the last support ring 2.7 and the end support ring 10.2 are designed in the same way.
  • When expanding the supporting prosthesis 1 accordingly, the common filament sections pivot 7 between the first and second support ring 2.1 and 2.2 counterclockwise and between the support rings 2.2 and 2.3 in a clockwise direction. The same applies to the connection points 3 between the respective other support rings depending on the orientation of the common filament sections 7 , The length change during expansion is therefore a maximum of 2 to 3%. This is ensured by the connection points 3 due to their orientation and shape. In addition, the curved or curved curved bends ( 5.1 - 5.6 . 61 , - 6.6) that even less tendency to set up the curvature arcs ( 5.1 - 5.6 . 6.1 - 6.6 ) is present when expanding. In addition, the shape of the denture window leads 8th In addition, they do not open too far during expansion and thus have a uniform expansion behavior. At the initial diameter of the supporting prosthesis 1 of 2 mm is the area of a denture window 8th about 4.89 mm 2 . When subsequently expanded to a diameter of 4 mm, the surface is approximately 11.26 mm 2 , which corresponds to a magnification factor of 2.3. Such tubular supporting prostheses 1 are crimped onto a balloon catheter prior to implantation, thereby further reducing their diameter, eg to 1 mm. The surface of the denture window 8th is then only 2.81 mm 2 , which corresponds to a reduction of almost half.
  • The following is based on the 6 to 9 an embodiment in the fine structure of the curvature arcs explained in more detail. Such measures in the fine structure can also be found in all previous embodiments application. However, the symmetry criteria mentioned with regard to the above-mentioned exemplary embodiments should also be understood independently (that is, with or without) of such possibly existing additional measures and, if appropriate, are disregarded in the symmetry consideration.
  • In 2 an enlarged view of a curvature arc (eg 5.1) is shown. The arc of curvature has a spot of the smallest cross-section 11 on. While the thigh 9.1 and the thigh 9.2 each having a constant cross section, the cross section tapers in the region of the apex region 9.3 continuously. This is created by an outer and inner radius of curvature, which have a staggered center to each other.
  • Due to the fact that the supporting prosthesis 1 is made of a metal tube, the support rings 2.1 - 2.7 such as 10.1 and 10.2 worked out of the metal tube with the help of a laser. Therefore, in the 7 to 9 illustrated cross sections each have the same height h. However, the cross-sectional areas differ in width. This decreases continuously from b 1 to b 3 .
  • The way of designing the body smallest cross section 11 as well as their arrangement may differ from this example. This could also be symmetrical in the middle of the vertex area 9.3 be arranged, with the two legs 9.1 . 9.2 have the same cross-section. This depends decisively on the desired deformation properties, in particular around which point the structure should bend. Also the vertex areas 9.3 attached to the common filament sections 7 may adjoin or form part of them, may be configured. The places smallest cross section 11 may also extend over a longer portion of the curvature bends.
  • Another embodiment shows 10 in which a coating 12 is provided. When coating 12 it is a silica-containing coating, ie a glass-like coating. The carrier material is preferably a metal alloy, in particular steel alloy, on which this coating 12 is applied. Such a coating 12 in particular should prevent uncontrolled deposits such as plaque etc. In particular, because of the vitreous surface with silicon dioxide, growth with cells of the body or adhesion of such cells is largely prevented, which, due to their hardness, causes damage during the attachment of the supporting prosthesis 1 counteracts in the body and thus simplifies handling. Due to the thinness of the coating is a simple design of the supporting prosthesis 1 allowed. Furthermore, this has a reduced friction due to lower roughness values and thus a smaller load for blood components and low Koagelbildung. Even after a longer retention time in the body, there is no degradation of the coating. In conjunction with the inventive design of the support rings is ensured that during the Aufdehnvorgang the coating 12 no damage, especially in places flakes off. Due to the chosen structure, in particular torsional forces are kept low during the expansion process. In 10 is very good to realize that the edges of the filament 4 are rounded by electropolishing.

Claims (13)

  1. Tubular support prosthesis (1) for vessels or intercorporeal lumina having at least two expandable support rings (2.1 - 2.7, 10.1, 10.2) arranged side by side and connected to one another at at least one connection point (3), each extending from one meandering to a plurality Curvature curves (5.1 - 5.6, 6.1 - 6.6) wound filament (4) are formed, each curvature arc (5.1-5.6, 6.1-6.6) a first leg (9.1), a second leg (9.2) and between these legs ( 9.1, 9.2), characterized in that one limb of at least one first arc of curvature (5.1) of a first support ring (2.1) and one limb of a curvature arc (6.2) of an adjacent second support ring (2.2) overlap laterally and in the overlapping area the connection point (3) is formed; wherein parts of the legs (9.1, 9.2) of the curvature arcs overlap in the overlapping area together with the vertex section (9.3), and the overlapping curvature arches (5.1, 6.2) in the overlapping area have a common filament section (7) forming the connection point (3) ; wherein a first support ring (2.1) circumferentially alternately on one side with an adjacent second support ring (2.2) and on the other side with a further adjacent third support ring (2.3) is connected.
  2. Supporting prosthesis (1) after Claim 1 , characterized in that a circumferential annular center line (M) of a support ring (2.1 - 2.7) is arranged substantially in a direction perpendicular to the support prosthesis main axis (A) extending cross-sectional plane.
  3. Supporting prosthesis (1) according to one of the preceding Claims 1 to 2 , characterized in that the meandering shape of the filament (4) of a support ring (2.1 - 2.7) has at least two different curvature arc shapes or sizes, which together form a recurring pattern of the meandering shape.
  4. Supporting prosthesis (1) according to one of Claims 1 to 3 , characterized in that a prosthesis window (8) formed between two interconnected overlapping regions comprises a first frame half (8.1) formed by the first support ring (2.1) and a second frame half (8.2) formed by the adjacent second support ring (2.2), both of them Frame halves (8.1, 8.2) are designed point-symmetrical to each other.
  5. Supporting prosthesis (1) according to one of Claims 1 to 4 , characterized in that the common filament portion (7) in the overlapping region at an angle (α) of greater than 0 °, preferably 10 °, relative to a parallels of the supporting prosthesis main axis (A) is inclined.
  6. Supporting prosthesis (1) after Claim 5 , characterized in that the angle (α) in at least one overlap region is 20 to 30 ° and in another overlap region 150 to 160 °.
  7. Supporting prosthesis (1) according to any one of the preceding claims, characterized in that the common filament portions (7) of the overlapping regions between two adjacent support rings (2.1,2.2) are all inclined in the same direction.
  8. Supporting prosthesis (1) according to one of the preceding claims, characterized in that the common filament portions (7) of the overlapping areas on one side of a support ring (2.1) are inclined in the opposite direction to the overlapping areas on the other side of the same support ring (2.1).
  9. Supporting prosthesis (1) according to one of the preceding claims, characterized in that the ratio (V) of the length (L Ü ) of the overlapping region, seen in the longitudinal direction of the supporting prosthesis axis (A), to the width (B 1 ) of the support ring (2.1) larger is greater than 0.1, preferably greater than 0.2.
  10. Supporting prosthesis (1) according to one of the preceding claims, characterized in that each arc of curvature (5.1 - 5.6, 6.1 - 6.6) comprises a first limb (9.1), a second limb (9.2) and an apex portion (9.3) extending between these limbs (9.1.9.2), and the first and second limbs (9.1, 9.2) are designed curved in the same direction.
  11. Supporting prosthesis (1) after Claim 10 , characterized in that the first and second limbs (9.1, 9.2) of the curvature arches (6.1 - 6.6) of a support ring (2.1) are curved in the same direction and the first and second limbs (9.1, 9.2) of the curvature arches (5.1 - 5.6 ) of the adjacent support rings (2.1,2.3) are curved in the opposite direction.
  12. Supporting prosthesis (1) according to one of the preceding claims, characterized in that on the filament (4) a coating (12) is provided which comprises silicon dioxide.
  13. Supporting prosthesis (1) according to one of the preceding claims, characterized in that each curvature arc (5.1 - 5.6, 6.1 - 6.6) has a point (11) of smallest cross section and the filament (4) at least in sections to the point (11) smallest cross section continuously rejuvenated.
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DE102008040791A1 (en) * 2008-07-28 2010-02-04 Biotronik Vi Patent Ag Endoprosthesis and method of making same
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