WO2004110312A1 - Stent - Google Patents

Stent Download PDF

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Publication number
WO2004110312A1
WO2004110312A1 PCT/DE2004/000570 DE2004000570W WO2004110312A1 WO 2004110312 A1 WO2004110312 A1 WO 2004110312A1 DE 2004000570 W DE2004000570 W DE 2004000570W WO 2004110312 A1 WO2004110312 A1 WO 2004110312A1
Authority
WO
WIPO (PCT)
Prior art keywords
stent
ring segments
coupling elements
characterized
undercut
Prior art date
Application number
PCT/DE2004/000570
Other languages
German (de)
French (fr)
Inventor
Thomas Nissl
Wilhelm Fink
Original Assignee
Alveolus Inc.
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
Priority to DE10325128A priority Critical patent/DE10325128A1/en
Priority to DE10325128.6 priority
Application filed by Alveolus Inc. filed Critical Alveolus Inc.
Publication of WO2004110312A1 publication Critical patent/WO2004110312A1/en

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
    • A61F2002/826Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents more than one stent being applied sequentially
    • 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
    • A61F2002/828Means for connecting a plurality of stents allowing flexibility of the whole 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
    • 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
    • A61F2002/91575Adjacent bands being connected to each other connected peak to trough
    • 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
    • A61F2002/91591Locking connectors, e.g. using male-female connections

Abstract

The invention relates to a stent (1) comprising a tubular supporting frame (2) that consists of axially successive interconnected ring segments (3-16). According to the invention, at least two neighboring ring segments (6 and 7 or 12 and 13) are connected by means of coupling elements that positively engage with each other and are embodied as complementary clamping connectors (31, 32). The coupling elements (20, 21) axially protrude from the ring segments (6 and 7; 12 and 13) along the longitudinal axis (L) of the stent. In addition, ring segments (3-6; 7-12; 13-16) can be interlocked by means of fixed connector struts (22) so as to form stent sections (23, 24, 25).

Description

stent

The invention relates to a stent with a tubular support frame of axially successive, interconnected ring segments.

Stents are used in the treatment of stenoses used. Stenoses are congenital or acquired illness closures or constrictions of tubular body tubes such as trachea, bronchus, esophagus, bile ducts, urinary tract, aorta and other vessels of the body. Cause of stenosis are often tumors that press the body tube, or deposits that close the body tubes. The stenosis can be opened by surgical and non-surgical measures. In the non-operative measures stents are introduced through catheter techniques in the intracorporeal vessel in the area of ​​the stenosis. Stents act there as a vascular prosthesis for supporting the vessel interior walls.

Stents are available in various embodiments and designs of the scaffold. Frequently The employed stents have a tubular scaffold of metal, which consists of several ring segments. These are usually formed from meander-wave or over Bogenab- sections adjoin one another endlessly striving. In the longitudinal direction of the stent adjacent ring segments are fixedly connected by tie bars. Such a stent is known from EP-B 0,364,787.

Many stents have fixed end diameter and are self-expanding. Other embodiments may be prepared by appropriate tools, such as balloons or spreader, change in diameter to fit the anatomical situation. Furthermore, stents made of a so-called shape memory alloy with memory effect are known in the art. The shape memory alloy Nitinol is most commonly used where it is a nickel-titanium alloy. A stent manufactured therefrom is temperature dependent over from its compressed state to its initial expanded stent state.

Within the scope of DE 100 26 307 A1, a stent of the prior art one with a support frame, at its ends in circumferential direction distributed plurality of holding elements are formed. Via the holding elements of the stent may be coupled to a positioning member of the delivery catheter.

The known from DE 199 50 756 A1 stent has in the unexpanded state to an articulated structure consisting of several ring segments, which engage in longitudinal direction into each other and thus are mutually pivotable, without a fixed physical connection between them. In the expanded state, the couplings between the individual ring segments are released or separated to completely disconnect the ring segments in the final expansion from each other.

However, depends on nature rarely have stenosis to a uniform course. They vary in the local spread, say for example the length and terms of constrictive. In practice it has been found that the scaffolds of the stent often either do not provide the necessary radial forces to withstand a stenosis sufficient even for an extended period or else are configured so that they obstruct the operation of the vessel. It is therefore desirable to have a highly customizable stent available.

The invention is, starting from the prior art, the object of the invention to provide a flexibly designed stent which can be adjusted in terms of its geometry, in particular its length and / or its supporting properties in an advantageous manner to the respective anatomy.

This object is according to the invention in a stent according to the features of claim 1, wherein the scaffold is formed of a plurality of axially successive annular segments and at least two adjacent ring segments are connectable by a form-fitting interlocking coupling elements.

The stent according to the invention or the ring segments used to form the stents are constructed in the manner of a modular system and individually assembled. The stent may everywhere be employed, where different lengths and / or different properties, eg different strong radial forces or geometries are to be used or need.

A stent may be configured in adaptation to the respective application requirements of the stenosis to be treated from individual or groups combined ring segments or assembled. A quick response time for specific and specially adapted stent for a patient is possible.

If the functional adaptation of the stent according to the invention by the combination of ring segments with different properties, in particular mutually different radial forces. This can be done through a combination of ring segments with different design and / or from different materials.

The proposed stent to its production and economic advantages. So the rejection rate can be reduced overall by the use of short individual ring segments. A single ring segment, for example, 20 mm long. A complete stent can then be composed of 6 individual ring segments with a total length of 120 mm. Is a ring segment faulty, only this single short ring segment needs to be replaced, whereas would be useless in an integral supporting structure of the entire stent.

However, the connection of the ring segments via the coupling elements is positively limited articulated. This measure is advantageous for the trackability of the stent.

The ring segments are connected via a form-fitting interlocking coupling elements. Preferably, the coupling elements are formed as mutually complementary jaws connector, as is provided by patent claim. 2 Conveniently, are both coupling elements relative to the ring segments in the stent longitudinal axis axially forward (claim 3). However, it is also conceivable that each one of the coupling elements is formed within the ring segment, so that only a corresponding coupling element projecting in the axial direction of the stent. In practice, it may be advantageous to use special end-ring segments at the respective free ends of a stent of the invention having only one side in the direction of the stent middle coupling elements.

the ring segments are positively connected via the coupling elements. For this purpose, the coupling elements to produce a stable compound to undercut. The undercut may be curved run (claim 4). Also rectilinear Hinterschneidungs- surfaces (claim 5) are advantageous. Moreover, it is possible a combination of curved and extending undercut rectilinear undercut of the coupling elements. With the undercut, the coupling elements are supported against each other, so that a reliable positive coupling of the ring segments to each other is ensured.

Conveniently, may be combined to form stent sections, a number of ring segments by connecting braces, as is provided by patent claim. 6 Thereafter, a number of ring segments are fixedly connected by tie bars. The sections, in turn, have coupling elements which permit inventively provided form-locking connection of the ring segments or the stent sections to one another.

According to the features of claim 7, the ring segments are formed of endless undulating together closing braces. Preferably, an inventive stent is made of metal. All deformable medically possible metals or metal alloys may be employed, such as stainless steel, cobalt alloys, pure iron or nickel-titanium alloys or other medical implant materials.

The invention is described in more detail below with reference to embodiments. Show it:

1, the stent pattern of a stent according to the invention in a

Completion;

2 shows a detail of the stent pattern in accordance with Figure 1;

Figure 3 in enlarged representation, the coupling elements of the stent according to

Figure 1 and 2, respectively; 4 shows a detail of the stent pattern of another embodiment of a stent;

Figure 5 is an enlarged representation of the coupling element of the stent according to Figure 4;

6 shows a detail of the stent pattern of another embodiment of a stent, and

Figure 7 is also an enlarged representation of the coupling elements of the stent according to FIG. 6

1 shows a metal-made stent 1 in the execution of its support frame 2. In practice, the support structure 2 is tubularly shaped. It consists of several successive annular segments 3-16. The ring segments 3-16 have a wave-shaped configuration of about Bogenab- cut 17 endlessly to each other closing struts 18, 19th

The adjacent ring segments 6 and 7 or 12 and 13 are connected by form-fit interlocking coupling elements 20, 21st Further, one recognizes that the annular segments are 3-6, 7-12 and 13-16 connected together by tie bars 22 to stent sections 23, 24, 25th The tie bars 22 have a V-shaped configured strut portion 26, which is arranged in the space between two adjacent ring segments with axial distance from 3-6, 7-12 and 13-16.

The embodiments of the stent, of which 4 to 7 cutouts are as shown in the figures, according to the basic structure of a stent 1 as described with reference to FIG. 1 The stents differ in the configuration of their coupling elements, is prepared by a releasable positive connection between the ring segments 6 and 7 or 12 and 13. FIG. The coupling elements 20, 21 and 27, 28 and 29, 30 are formed as mutually complementary connector claws 31, 32 and 33, 34 and 35, 36th They complement each other so that a positive connection between the ring segments 6 and 7 or 12 and 13, and is thus generated between the stent sections 23, 24, 25 through the mutual engagement.

The coupling elements 20, 21 in the embodiment according to Figures 1 to 3 are as hook-like claw connectors 31, 32 formed with linearly extending undercut surfaces 37 and curved running undercut 38. Both the claws connector 31 and the claws connector 32 have a finger-shaped hook portion 39 forming a kind of jaw, in which engages a zinc-like abutment portion 40 of the other claw connector 31 and 32 respectively.

can also be seen in the connection area 41 of the coupling elements 20 has a recess 42. This supports the flexibility of the ring segment 6 or 13 in the connecting area 41 and contributes to saving material and weight.

Furthermore, it can be seen that the coupling elements 21 are connected via a parallel to the stent longitudinal axis L longitudinal portion 43 at the deepest at the bow portion 17 between two struts 18 connected 19th

The coupling elements 27, 28 as described with reference to Figures 4 and 5 are also designed as mutually complementary connector claws 33, 34, wherein the left in the image plane claws connector is configured fork-shaped 33rd In the fork 44 of the right jaw connector 34 engages with its approximately configured abutment head 45th The undercut surfaces 46, 47 formed on the jaws connectors 33, 34 are uniformly curved.

In the abutment head 45 a circular recess 48 is provided. The recess 48 contributes to weight saving on, but may also be used to accommodate a label which serves to improve the Indentification of the stent during implantation process or thereafter. Reference to the figures 6 and 7 a further alternative embodiment of coupling elements 29, 30 is shown on a releasable form-locking connection between two adjacent ring segments 6 and 7 or 12 and 13 of a stent 1 can be manufactured.

Also, the coupling elements 29, 30 have two complementary connector claws 35, 36 having a trapezoidal configuration. The claw connector 35 has two finger tines 49, 50 with rectilinear undercut surfaces 51, 52 which form a mouth-like recess 53 for a trapezium-shaped tines 54 of the claw connector 36th The prongs 54 comes in the recess 53 for engagement and is supported here with its straight undercut surfaces 55, 56 from. The tine 54 also has a broadened base portion 57 merges into a longitudinal portion 58 for connection to an arc portion 17 between two struts 18, 19th

REFERENCE NUMBERS

1 - stent

2 scaffold

3 - ring segment

4 - ring segment 5- ring segment

6 - ring segment

7 - ring segment

8 - ring segment

9 - ring segment 10 ring segment 11 - ring segment

12- ring segment

13- ring segment

14- ring segment

15- ring segment

16- ring segment

17- arc section

18- strut

19- strut

20 - coupling element

21 - coupling element

22 - tie bar

23- stent section

24- stent section

25- stent section

26 - strut portion

27 - coupling element

28 - coupling element

29 - coupling element 0 - coupling element 1 - claw connector 2 - claw connector 3 - claw connectors 4 - claw connector 5 - claw connector 6 - claw connector 7 - straight undercut surface 8 - curved undercut 9 - hook portion 0 - abutment portion 1 - connecting area, 2 - recess 3 - longitudinal portion 4 - Fork 5 - abutment head 6 - undercut 7 - 8 undercut surface - recess 9 - dovetails 0 - dovetails 1 - undercut 2 - undercut 3 - recess 4 - tines 5 - undercut 6 - undercut 7 - base portion 8 - longitudinal portion

L - stent longitudinal axis

Claims

claims
1. Stent with a tubular supporting frame (2) consists of axially successive interconnected ring segments (3-16), characterized in that at least two adjacent ring segments (6 and 7 or 12 and 13) (through a form-fitting interlocking coupling elements 20, 21; 27, 28; 29, 30) are connected.
2. The stent of claim 1, characterized in that the coupling elements (20, 21; 27, 28; 29, 30) as mutually complementary connector claws (31, 32; 33, 34; 35, 36) are formed.
3. The stent of claim 1 or 2, characterized in that the coupling elements (20, 21; 27, 28; 29, 30) with respect to the ring segments (6, 7; 12, 13) in the stent longitudinal axis (L) projecting axially.
4. The stent according to any one of claims 1 to 3, characterized in that the coupling elements (20, 21; 27, 28) is curved extending undercut (38, 46, 47).
5. The stent according to one of claims 1 to 3, characterized gekennzeichne t, that the coupling elements (20, 21; 29, 30) rectilinearly extending undercut (37, 51, 52, 55, 56).
6. A stent according to any one of claims 1 to 5, characterized in that the ring segments (3-6; 7-12; 13-16) by tie bars (22) to the stent sections (23, 24, 25) are connected together.
7. The stent according to one of claims 1 to 6, characterized gekennzeichne t that the ring segments (3-16) of endless undulating together closing braces (18, 19) are formed.
PCT/DE2004/000570 2003-06-04 2004-03-19 Stent WO2004110312A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10325128A DE10325128A1 (en) 2003-06-04 2003-06-04 stent
DE10325128.6 2003-06-04

Publications (1)

Publication Number Publication Date
WO2004110312A1 true WO2004110312A1 (en) 2004-12-23

Family

ID=33494807

Family Applications (1)

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PCT/DE2004/000570 WO2004110312A1 (en) 2003-06-04 2004-03-19 Stent

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US7704275B2 (en) 2007-01-26 2010-04-27 Reva Medical, Inc. Circumferentially nested expandable device
US7722662B2 (en) 1998-02-17 2010-05-25 Reva Medical, Inc. Expandable stent with sliding and locking radial elements
US7763065B2 (en) 2004-07-21 2010-07-27 Reva Medical, Inc. Balloon expandable crush-recoverable stent device
WO2010118126A1 (en) 2009-04-07 2010-10-14 William Cook Europe Aps Modular stent assembly
US7914574B2 (en) 2005-08-02 2011-03-29 Reva Medical, Inc. Axially nested slide and lock expandable device
US7947071B2 (en) 2008-10-10 2011-05-24 Reva Medical, Inc. Expandable slide and lock stent
US7988721B2 (en) 2007-11-30 2011-08-02 Reva Medical, Inc. Axially-radially nested expandable device
US8277500B2 (en) 2004-12-17 2012-10-02 Reva Medical, Inc. Slide-and-lock stent
US8523936B2 (en) 2010-04-10 2013-09-03 Reva Medical, Inc. Expandable slide and lock stent
CN104068951A (en) * 2007-05-23 2014-10-01 山东吉威医疗制品有限公司 Devices for controlling expandable prostheses during deployment
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US9408732B2 (en) 2013-03-14 2016-08-09 Reva Medical, Inc. Reduced-profile slide and lock stent
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Cited By (27)

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US7722662B2 (en) 1998-02-17 2010-05-25 Reva Medical, Inc. Expandable stent with sliding and locking radial elements
EP1523959A2 (en) * 2003-10-17 2005-04-20 Cordis Corporation Stent design having independent segments which uncouple upon deployment
EP1523959A3 (en) * 2003-10-17 2006-07-05 Cordis Corporation Stent design having independent segments which uncouple upon deployment
US9566179B2 (en) 2003-12-23 2017-02-14 J.W. Medical Systems Ltd. Devices and methods for controlling and indicating the length of an interventional element
US9700448B2 (en) 2004-06-28 2017-07-11 J.W. Medical Systems Ltd. Devices and methods for controlling expandable prostheses during deployment
US8512394B2 (en) 2004-07-21 2013-08-20 Reva Medical Inc. Balloon expandable crush-recoverable stent device
US7763065B2 (en) 2004-07-21 2010-07-27 Reva Medical, Inc. Balloon expandable crush-recoverable stent device
US8277500B2 (en) 2004-12-17 2012-10-02 Reva Medical, Inc. Slide-and-lock stent
US8292944B2 (en) 2004-12-17 2012-10-23 Reva Medical, Inc. Slide-and-lock stent
US9173751B2 (en) 2004-12-17 2015-11-03 Reva Medical, Inc. Slide-and-lock stent
US7914574B2 (en) 2005-08-02 2011-03-29 Reva Medical, Inc. Axially nested slide and lock expandable device
US8617235B2 (en) 2005-08-02 2013-12-31 Reva Medical, Inc. Axially nested slide and lock expandable device
US9149378B2 (en) 2005-08-02 2015-10-06 Reva Medical, Inc. Axially nested slide and lock expandable device
US8540762B2 (en) 2007-01-26 2013-09-24 Reva Medical, Inc. Circumferentially nested expandable device
US7704275B2 (en) 2007-01-26 2010-04-27 Reva Medical, Inc. Circumferentially nested expandable device
CN104068951A (en) * 2007-05-23 2014-10-01 山东吉威医疗制品有限公司 Devices for controlling expandable prostheses during deployment
US7988721B2 (en) 2007-11-30 2011-08-02 Reva Medical, Inc. Axially-radially nested expandable device
US8460363B2 (en) 2007-11-30 2013-06-11 Reva Medical, Inc. Axially-radially nested expandable device
US9314354B2 (en) 2007-11-30 2016-04-19 Reva Medical, Inc. Axially-radially nested expandable device
US7947071B2 (en) 2008-10-10 2011-05-24 Reva Medical, Inc. Expandable slide and lock stent
US9066827B2 (en) 2008-10-10 2015-06-30 Reva Medical, Inc. Expandable slide and lock stent
US8545547B2 (en) 2008-10-10 2013-10-01 Reva Medical Inc. Expandable slide and lock stent
US8361141B2 (en) 2009-04-07 2013-01-29 Cook Medical Technologies Llc Modular stent assembly
WO2010118126A1 (en) 2009-04-07 2010-10-14 William Cook Europe Aps Modular stent assembly
US8523936B2 (en) 2010-04-10 2013-09-03 Reva Medical, Inc. Expandable slide and lock stent
US9452068B2 (en) 2010-04-10 2016-09-27 Reva Medical, Inc. Expandable slide and lock stent
US9408732B2 (en) 2013-03-14 2016-08-09 Reva Medical, Inc. Reduced-profile slide and lock stent

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