WO2017042329A1 - EXPANDIERBARE GEFÄßSTÜTZE - Google Patents

EXPANDIERBARE GEFÄßSTÜTZE Download PDF

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Publication number
WO2017042329A1
WO2017042329A1 PCT/EP2016/071296 EP2016071296W WO2017042329A1 WO 2017042329 A1 WO2017042329 A1 WO 2017042329A1 EP 2016071296 W EP2016071296 W EP 2016071296W WO 2017042329 A1 WO2017042329 A1 WO 2017042329A1
Authority
WO
WIPO (PCT)
Prior art keywords
vascular support
webs
support according
ring segments
recesses
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.)
Ceased
Application number
PCT/EP2016/071296
Other languages
German (de)
English (en)
French (fr)
Inventor
Milisav Obradovic
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.)
Bentley Innomed GmbH
Original Assignee
Bentley Innomed GmbH
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 BR112018003340-5A priority Critical patent/BR112018003340B1/pt
Priority to PL16775480.3T priority patent/PL3346954T3/pl
Priority to JP2018511449A priority patent/JP6860222B2/ja
Priority to RU2018112503A priority patent/RU2720843C2/ru
Priority to ES16775480T priority patent/ES2969559T3/es
Priority to US15/756,324 priority patent/US10786376B2/en
Application filed by Bentley Innomed GmbH filed Critical Bentley Innomed GmbH
Priority to CN201680052848.6A priority patent/CN108024862B/zh
Priority to EP16775480.3A priority patent/EP3346954B1/de
Publication of WO2017042329A1 publication Critical patent/WO2017042329A1/de
Priority to IL257901A priority patent/IL257901B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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 sheets 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
    • A61F2002/91566Adjacent bands being connected to each other connected trough 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 sheets 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 sheets 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
    • A61F2210/00Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0004Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0006Rounded shapes, e.g. with rounded corners circular
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0013Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
    • 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
    • A61F2250/0012Special 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 elasticity, flexibility, spring rate or mechanical tension
    • 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
    • A61F2250/0014Special 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
    • A61F2250/0036Special 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 thickness
    • 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
    • A61F2250/0058Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0071Additional features; Implant or prostheses properties not otherwise provided for breakable or frangible

Definitions

  • the invention relates to a vascular support with individual ring segments, whose webs take a meandering course, and connecting webs between adjacent ring segments, which converge at connecting points with the webs of the ring segments.
  • the vascular supports consist in particular of a material which can be degraded in vivo, and very particularly preferably of such a plastic.
  • Vascular supports are widely used in the coronary, cerebral and peripheral areas to dilate and recanalize narrowed vessels and to seal off aneurysms, shunts and unwanted branches in vessels.
  • in vivo degradable materials is set, which dissolve in the body over a defined period of time.
  • Vascular supports, especially drug-loaded stents, are usually needed only for a limited period and are unnecessary if they have fulfilled their purpose.
  • vascular supports based on polylactides and polygalactides were developed.
  • Vascular supports that serve to dilate vessels are usually placed on balloons crimped over catheters, expanded using the balloons, after which the balloons are withdrawn in a deactivated state leaving the vascular support behind.
  • individual ring segments are widened more or less strongly and come under tension.
  • the expansion causes the live parts of the stent to move out of the cylinder plane. Resulting edges and burrs can lead to vascular injuries.
  • Plastics are less hard than metals and less prone to the formation of sharp edges.
  • a disadvantage of plastic stents is their tendency to form cracks during the widening at the points subjected to tension or, in the case of a compression, to bulge out considerably.
  • vascular props composed on a plurality of ring segments with meandering ridges, this behavior is common.
  • stent structures of this type have proved successful due to their radial behavior and the controllability of the length reduction during expansion.
  • stent and "vascular support” are used synonymously.
  • the terms extend not only to vascular and coronary stents, but rather to all vascular supports usable in body lumens.
  • ring segment refers to support elements of a vascular support that extend in the circumferential direction, such that the diameter of the vascular support can be widened during expansion by stretching the loops.
  • andering designates a course with curvatures, in serpentine lines or in zigzag shape.
  • the individual ring segments of a vascular support each consist, depending on the perspective, of a single web with a curved course or a plurality of webs, which are each connected to each other and form the meandering shape.
  • Adjacent ring segments of a vascular support are interconnected by connecting webs.
  • the connecting webs may have a straight, curved, S-shaped or spiral shape; Straight-run connecting webs are preferred according to the invention.
  • connection points In the constellation described above go from the connection points in each case three web arms.
  • recesses extending from the outside into the web are located at some of the connection points, preferably at the connection points at which the ring segments are compressed in the region of the junctions of the connecting webs. This is usually the case at the connection points on the outer arches.
  • the recesses give space to the upset material of the ring segment, so that it does not come to the bulges described above.
  • the notches may be notches or notches leading into and out of the land from the outside, as well as actual cutouts or "punches.”
  • the cutouts preferably have a rounded contour, which has the advantage of having ripples , as they can occur when crimping on a balloon and expanding the balloon, are shut down.Recommended are recesses with a circular or elliptical contour. The tensions extend through the web and are open to the edge.
  • the recesses extend in the region of the angles of the connection points from the edge into the annular webs and thereby also capture the connecting webs.
  • For circular or elliptical recesses amounts the radius preferably 1/20 to 1/10 of the web width. For cuts and notches applies accordingly.
  • the webs of the ring segments can have cuts which are located in the region of the arcs of the meandering ring segments.
  • the cuts are slots that follow the course of the ring segment. Slits or slots are completely inside the webs. Their width is preferably 1/40 to 1/4, in particular 1/20 to 1/10 of the web width.
  • the cuts give the ring segments flexibility and are suitable for absorbing the material displaced during compression.
  • the cuts or slots are preferably in the region of the connection points of the ring segments, on which connecting webs are arranged in inner sheets.
  • the incisions extend over a length which corresponds to the simple to triple web width.
  • Notches or slits can also be arranged in particular in the region of the arcs of the ring segments, where they follow the web course.
  • the inventive design of the vascular supports is particularly suitable for those who are cut from a plastic, such as a degradable plastic.
  • polylactides, polygalactides, their copolymers and mixtures thereof come into question. It is understood, however, that the invention is applicable to vascular supports made of any materials; the material is not important.
  • the stents according to the invention are conventional balloon-expandable stents. These are crimped onto a balloon in the usual way, placed over a balloon catheter, hydraulically expanded, after which the catheter is withdrawn with the relaxed balloon. It is understood that the stent may be coated or impregnated with drugs in a manner known per se, for example to prevent restenosis in stenosed vessels.
  • the invention is explained in more detail by the accompanying drawings. Show it:
  • Fig. 1 shows a conventional stent design in expanded form
  • Fig. 2 shows a detail of the stent design of
  • FIG. 3 shows modifications of the design of FIG. 2 with respect to FIG.
  • FIG. 4 shows further modifications of the design of FIG. 2;
  • Fig. 6 is a photographic representation of a pattern of Fig. 2 prior to expansion of the stent.
  • FIG. 7 shows the detail of Fig. 6 after the expansion of the stent.
  • Figure 1 shows a conventional stent 1 with meandering ring segments 2 and connecting webs 3 between adjacent ring segments 2 in cut and spread out form.
  • the individual ring segments consist of a continuous web 4, which takes a meandering or serpentine course, with outer arches 5, inner arches 6 and connecting points 7 to connecting webs 3.
  • the inner arches 6 at the connection points 7 to the connecting webs 3 have a trough-shaped recess 8.
  • the connecting webs 3 have a width which is slightly smaller than the webs of the ring segments 2, for example by 5 to 20%.
  • Figure 2 shows a section of the stent design of Figure 1 with recesses 9a and 9b according to the invention.
  • the recesses 9 a and 9 b represent two independent variants, each of which can be realized individually and are arranged in the angles of the connection point 7 between the ring segment 2 and the connecting member 3.
  • Both recesses 9a and 9b have a circular contour and have a rounded transition into the edges of the ring segment 2 and the connecting web 3.
  • Both recesses 9 a and 9 b are arranged so that they detect both the connecting web 3 and the ring segment 2.
  • Recess 9b has a larger diameter than recess 9a.
  • Figure 3 shows a further variant for the design of the connection points 7 with recesses 9a in the angles formed between the connecting webs 3 and the ring segment 2.
  • Around one of the recesses 9a around an incision 10 is arranged, which surrounds the recess 9a almost semi-circular.
  • the recesses 9a and 9b of Figures 1 and 2 as well as the incision 10 are located in the areas of the stent 1, which come under pressure during expansion.
  • the recesses are free space in the at the Expansion material can be moved, see Figure 6/7.
  • the rounded contours are suitable for preventing the formation of cracks.
  • FIG. 4 shows a further embodiment of a stent according to the invention with recesses 9a arranged in the connection point 7.
  • the connecting web 3 extends from the outer bow 5, which is at the same time connecting point 7, to the inner bow 6 of the adjacent ring segment 2.
  • the ring segment 2 is provided with a concavity or depression 8. Such a depression extends the inner arc 6 and makes it possible to smooth the transition from the connecting web 3 to the ring segment 2 gentler.
  • FIG. 5 shows a further variant of a design according to the invention of a stent 1 in the region of a connecting web 3 between two ring segments 2.
  • Recesses 9a in the region of the connecting point can be surrounded by a slot 10 in the shape of a semicircle.
  • slot-shaped cuts 1 1 and 12 which follow the course of the ring segment 2, on the ring segment 2 a, which is adjacent to the ring segment 2 with the recesses 9 a.
  • the slots are capable of compensating for the stresses encountered in the expansion of the stent.
  • FIG. 6 shows a photograph of a stent cutout with recesses 9a in the region of the connection point 7 between ring segment 2 and web 3.
  • FIG. 7 shows the same region of the stent of FIG. 6 after the expansion of the stent; the recesses have closed by shifting material from the ring segment 2.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
PCT/EP2016/071296 2015-09-10 2016-09-09 EXPANDIERBARE GEFÄßSTÜTZE Ceased WO2017042329A1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
PL16775480.3T PL3346954T3 (pl) 2015-09-10 2016-09-09 Rozszerzalny stent naczyniowy
JP2018511449A JP6860222B2 (ja) 2015-09-10 2016-09-09 拡張可能な脈管ステント
RU2018112503A RU2720843C2 (ru) 2015-09-10 2016-09-09 Расширяемый стент
ES16775480T ES2969559T3 (es) 2015-09-10 2016-09-09 Endoprótesis vascular expandible
US15/756,324 US10786376B2 (en) 2015-09-10 2016-09-09 Expandable vascular stent
BR112018003340-5A BR112018003340B1 (pt) 2015-09-10 2016-09-09 Stent com segmentos de anel individuais
CN201680052848.6A CN108024862B (zh) 2015-09-10 2016-09-09 可扩张脉管支架
EP16775480.3A EP3346954B1 (de) 2015-09-10 2016-09-09 Expandierbare gefässstütze
IL257901A IL257901B (en) 2015-09-10 2018-03-06 Expandable vascular stent

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US20180256374A1 (en) 2018-09-13
ES2969559T3 (es) 2024-05-21
RU2018112503A (ru) 2019-10-11
JP6860222B2 (ja) 2021-04-14
RU2018112503A3 (https=) 2019-12-20
CN108024862A (zh) 2018-05-11
EP3346954A1 (de) 2018-07-18
US10786376B2 (en) 2020-09-29
EP3346954B1 (de) 2023-11-22
PL3346954T3 (pl) 2024-05-20
CN108024862B (zh) 2021-02-23
RU2720843C2 (ru) 2020-05-13
JP2018526115A (ja) 2018-09-13
BR112018003340A2 (pt) 2018-09-18
DE102015115279A1 (de) 2017-03-16
EP3346954C0 (de) 2023-11-22
IL257901A (en) 2018-05-31
IL257901B (en) 2021-12-01

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