CA2237476C - Coronary stent - Google Patents

Coronary stent Download PDF

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Publication number
CA2237476C
CA2237476C CA002237476A CA2237476A CA2237476C CA 2237476 C CA2237476 C CA 2237476C CA 002237476 A CA002237476 A CA 002237476A CA 2237476 A CA2237476 A CA 2237476A CA 2237476 C CA2237476 C CA 2237476C
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CA
Canada
Prior art keywords
connectors
coronary stent
stent according
web
short
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Expired - Lifetime
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CA002237476A
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French (fr)
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CA2237476A1 (en
Inventor
Randolf Von Oepen
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Abbott Laboratories Vascular Enterprises Ltd
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Abbott Laboratories Vascular Enterprises Ltd
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Application filed by Abbott Laboratories Vascular Enterprises Ltd filed Critical Abbott Laboratories Vascular Enterprises Ltd
Publication of CA2237476A1 publication Critical patent/CA2237476A1/en
Application granted granted Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A61F2/91—Stents 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A61F2/91—Stents 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
    • A61F2/915—Stents 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A61F2/91—Stents 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
    • A61F2/915—Stents 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
    • A61F2002/91525—Stents 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A61F2/91—Stents 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
    • A61F2/915—Stents 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
    • A61F2002/91533—Stents 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents 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
    • A61F2/91—Stents 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
    • A61F2/915—Stents 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
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0029—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in bending or flexure capacity

Abstract

A coronary stent according to the present invention has a flexible tip which allows it to follow the winding of vessels when inserted into a patient's body. The stent comprises a tubular body having walls of a web structure. The web structure defines a series of cells. The cells of the web structure are of a configuration to provide the flexible tip while also allowing easy and reliable expansion of the stent.

Description

CORONARY STENT
Description The present invention relates to a coronary stent.
Very different types of coronary stents are already known from the prior art.
The stents form a vascular prosthesis made from a physically compatible material. The scent or stent prosthesis is used for expanding blood vessels or also other body orifices and for keeping said vessels in their expanded state. To this end, the stent is positioned in a patient's body in its non-expanded state and is then expanded by suitable means, for instance a balloon catheter. During expansion the individual web portions of the stent are deformed such that the stent permanently remains in its expanded form.
When stents are constructed, the fundamental problem arises that these must have a sufficiently small diameter in their non-expanded state to be introducible into and positionable in a patients body. The stents must be flexible along their longitudinal axis to some degree so as to be able to follow the shapes of, for instance, blood vessels. During expansion the stent must be expanded such that its outer diameter becomes considerably larger. Such an expansion is achieved by deforming the individual web portions in such a manner that no cracks, or the like, are formed.
It is the object of the present invention to provide a stent of the above-mentioned type which is of a simple structure, can easily be manufactured and safely used and is, nevertheless, extremely flexible and capable of applying and receiving sufficiently high radial forces.
This object is achieved according to the invention by the features of the main claim;
the subclaims show further advantageous developments of the invention.

la According to one aspect of the present invention, there is provided a coronary stent comprising a tubular body having a first end and a second end in which the tubular body is formed of a web structure, the web structure comprising a plurality of first main web patterns extending in a circumferential direction and a plurality of second main web patterns extending in a circumferential direction, the second main web patterns being different than the first main web patterns and being alternatingly coupled between adjacent pairs of the first main web patterns to form a plurality of neighboring cells, the first and second main web patterns having axial lengths, and a flexible tip having a first short-legged web pattern with an axial length, the first short-legged web pattern being coupled to at least one of the ends of the tubular body by a row of first connectors, the flexible tip further comprising a second short-legged web pattern with an axial length and at least one further row of second connectors, the second connectors being coupled between the first short-legged web pattern and the second short-legged web pattern, the axial lengths of the first and second short-legged web patterns being shorter in an axial direction than the axial lengths of the first and second main web patterns.
-2-The invention provides for an extremely flexible stent which can easily follow the windings of vessels when being inserted into a patient's body. Since the tip of the stent according to the invention is extremely flexible, the stent can follow the vessel windings very well and easily while being positioned, because it follows the guide wire of the balloon catheter, on which the stent is mounted during positioning, as if on a rail.
The inventive stent is thus characterized by a very high flexibility of its tip. During the positioning operation the stent is, so to speak, pulled by the tip through the vessel, as the tip can easily follow the vessel owing to its flexibility.
The flexible tip can be produced in various ways. In a preferred embodiment, a spiral is mounted a1: the end of the stent.
In a further, particularly preferred embodiment, connectors that have about the shape of a watch spring are formed at the end of the stent. A connector preferably engages only every second or third end of a web pattern that preferably extends in zig-zag fashion. Preferably, however, there should be at least three connectors so that the tip can very easily be coupled to the stent. At least one web pattern that extends in wound fashion is mounted on the connectors for forming the tip in a final manner. This subsequent web pattern (meander pattern) should preferably have short legs to avoid any inherent rigidity thereof. Such a design can preferably be achieved by increasing the number of zig-zag lines.
In a further, particularly preferred embodiment, a plurality of connectors and preferably short-legged meandering web patterns can alternately be mounted at the end of the stent.
-3-Although a shape of the connectors in the form of a watch spring or a spiral represents a particularly preferred embodiment, other connectors that permit a flexible design of the tip are also possible in principle.
The inventive stent is characterized by several considerable advantages.
In the non-expanded state, the inventive assembly yields sufficient strength, but also high flexibility. The webs or web portions of the cells of the wall of the stent ensure that the stent can be expanded in an easy and reliable manner.
A zig-zag-shaped design of the folded webs of the first cells has turned out be very advantageous, so that these webs preferably form a band-like portion extending in circumferential direction. Such band-like portions increase the strength of the stent and also ensure its dimensional stability in the expanded state.
The invention shall now be described with reference to three embodiments in conjunction with the drawing, in which:
Fig. 1 is a schematically very simplified illustration of the basic structure of the stent according to the invention;
Fig. 2 is an illlustration of a first embodiment of the web structure of the wall of the stent in the non-expanded state;
Fig. 3 is an ili'ustration, corresponding to Fig. 2, of a second embodiment, and Fig. 4 is an il'ustration, corresponding to Figs. 2 and 3, of a third embodiment.

Fig. 1 shows the fundamental structure of an inventive stent 1 which comprises a flexible, tubular body 2 having a wall, of which the front side 3 is visible in Fig. 1.
Fig. 2 shows a first embodiment of the inventive stent, wherein, for explaining the structure of the body 2, the wall thereof is illustrated in planar form according to the plane of drawing of Fig. 1 As illustrated in Fig. 2, the stent 1 has a web structure which in the example alternately comprises web patterns 5 and 6, the web patterns 6 respectively interconnecting the web patterns 5. The web patterns 5 and 6 have webs which extend in zig-zag-like or meander-like fashion and define cells of the web structure.
A flexible tip ~4 is arranged at the front end 4 of the inventive stent 1. In Fig. 2, this portion is encircled by a broken line.
In the embodiment illustrated in Fig. 2, the tip 4 has a plurality of preferably at least 3 connectors, of which one connector 7 is provided with a corresponding reference numeral and shown as a typical example. As illustrated in Fig. 2, the connector is s-shaped or spirally wound in a manner similar to the spring of a watch. At one of its free ends 8, the connector 7 is connected to the web patterns 5 provided at the front side. At the oi:her free end 9 the connector 7 is arranged next to a further, preferably short-legged web pattern 10. The web pattern 10 is provided with shorter legs than the web patterns 5 and 6, respectively. It also extends in wound or zig-zag-shaped fashion and c,an thus also be referred to as a meander-like pattern.
The tip 4 in the above-described embodiment is extremely flexible, thereby permitting an insertion of the stent into a patient's body in a very reliable manner, as the flexible tip prevents the stent from getting entangled in the inner wall of the vessel and thus from injuring the wail.

Fig. 3 illustrates a second embodiment of the inventive stent. All features that correspond to~ those shown in Fig. 2 are provided with identical reference numerals.
The essential difference with respect to the embodiment according to Fig. 2 must be seen in the design of the flexible tip 4' which in the example comprises a further row of connectors 7' with a further web pattern 10' connected thereto, in addition to the plurality of connectors 4 and the web pattern 10 connected thereto. Fig. 3 illustrates that the connE:ctors 7' are arranged relative to the connectors 7 such that they are bent by 180° and that the web pattern 10' is disposed such that it is phase-shifted with respect to the web pattern 10. Apart from that, however, reference can be made to the illustratiion in Fig. 2. Tip 4' is also very flexible and thus permits a reliable insertion of the stent into a patient's body, as said stent can very easily follow the windings of the vessels, even in cases where the web structure of the wall 2 is relatively rigid.
Fig. 4 is a schematically very simplified illustration showing a third embodiment. The stent 1 of this embodiment is provided at one of its front ends 3 with a flexible tip 4"
which is formed as a spiral. The spiral 4" is connected to the web structure of the body 2 at two ends 11 and 12. The connection is preferably of an integral type which can also be used in the embodiments shown in Figs. 2 and 3.

Claims (23)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A coronary stent comprising:
a tubular body having a first end and a second end in which said tubular body is formed of a web structure, said web structure comprising a plurality of first main web patterns extending in a circumferential direction and a plurality of second main web patterns extending in a circumferential direction, said second main web patterns being different than said first main web patterns and being alternatingly coupled between adjacent pairs of said first main web patterns to form a plurality of neighboring cells, said first and second main web patterns having axial lengths; and a flexible tip having a first short-legged web pattern with an axial length, said first short-legged web pattern being coupled to at least one of said ends of said tubular body by a row of first connectors, said flexible tip further comprising a second short-legged web pattern with an axial length and at least one further row of second connectors, said second connectors being coupled between said first short-legged web pattern and said second short-legged web pattern, said axial lengths of said first and second short-legged web patterns being shorter in an axial direction than said axial lengths of said first and second main web patterns.
2. A coronary stent according to claim 1, wherein said first connectors are wound in s-shaped fashion.
3. A coronary stent according to claim 1 or 2, wherein said second connectors are wound in s-shaped fashion.
4. A coronary stent according to claim 3, wherein said first connectors are wound in an opposite direction from said second connectors.
5. A coronary stent according to any one of claims 1 to 4, wherein said first and second connectors are formed as spring elements of high elasticity.
6. A coronary stent according to any one of claims 1 to 5, wherein said first and second main web patterns are zig-zag shaped band portions.
7. A coronary stent according to claim 6, wherein said first and second short-legged web patterns are zig-zag shaped band portions.
8. A coronary stent according to claim 6 or 7, wherein said first main web pattern is phase-shifted from said second main web pattern.
9. A coronary stent according to any one of claims 6 to 8, wherein said first and second connectors are not axially aligned with each other.
10. A coronary stent according to any one of claims 6 to 9, wherein said first main web pattern is different from said second main web pattern.
11. A coronary stent according to claim 10, wherein said first connectors are wound in s-shaped fashion.
12. A coronary stent according to claim 11, wherein said second connectors are wound in s-shaped fashion.
13. A coronary stent according to claim 11 or 12, wherein said first connectors are wound in an opposite direction from said second connectors.
14. A coronary stent according to any one of claims 11 to 13, wherein said first and second connectors are not axially aligned with each other.
15. A coronary stent according to any one of claims 11 to 14, wherein said first main web pattern is different from said second main web pattern.
16. A coronary stent according to any one of claims 1 to 6, wherein said first and second short-legged web patterns are zig-zag shaped band portions.
17. A coronary stent according to claim 16, wherein said first short-legged web pattern is phase shifted from said second short-legged web pattern.
18. A coronary stent according to claim 17, wherein said first connectors are wound in s-shaped fashion.
19. A coronary stent according to claim 18, wherein said second connectors are wound in s-shaped fashion.
20. A coronary stent according to claim 19, wherein said first connectors are wound in an opposite direction from said second connectors.
21. A coronary stent according to claim 19 or 20, wherein said first and second connectors are not axially aligned with each other.
22. A coronary stent according to claim 21, wherein said first main web pattern is different from said second main web pattern.
23. A coronary stent according to claim 21, wherein said first and second main web patterns are zig-zag shaped band portions.
CA002237476A 1997-05-20 1998-05-13 Coronary stent Expired - Lifetime CA2237476C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29708879.3 1997-05-20
DE29708879U DE29708879U1 (en) 1997-05-20 1997-05-20 Coronary stent

Publications (2)

Publication Number Publication Date
CA2237476A1 CA2237476A1 (en) 1998-11-20
CA2237476C true CA2237476C (en) 2006-01-03

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Family Applications (1)

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CA002237476A Expired - Lifetime CA2237476C (en) 1997-05-20 1998-05-13 Coronary stent

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US (1) US6017365A (en)
EP (1) EP0879584B2 (en)
JP (1) JPH10328312A (en)
AT (1) ATE273670T1 (en)
CA (1) CA2237476C (en)
DE (2) DE29708879U1 (en)

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