EP3773357A1 - Stent ramifié et système de stent - Google Patents

Stent ramifié et système de stent

Info

Publication number
EP3773357A1
EP3773357A1 EP19721202.0A EP19721202A EP3773357A1 EP 3773357 A1 EP3773357 A1 EP 3773357A1 EP 19721202 A EP19721202 A EP 19721202A EP 3773357 A1 EP3773357 A1 EP 3773357A1
Authority
EP
European Patent Office
Prior art keywords
branched stent
side arm
arm
main
stent
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.)
Pending
Application number
EP19721202.0A
Other languages
German (de)
English (en)
Inventor
Frank Ficker
Marielies Becker
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.)
Freistaat Bayern Vertreten Durch Hochschule Hof Institut Fuer Materialwissenschaften
Original Assignee
Freistaat Bayern Vertreten Durch Hochschule Hof Institut Fuer Materialwissenschaften
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Freistaat Bayern Vertreten Durch Hochschule Hof Institut Fuer Materialwissenschaften filed Critical Freistaat Bayern Vertreten Durch Hochschule Hof Institut Fuer Materialwissenschaften
Publication of EP3773357A1 publication Critical patent/EP3773357A1/fr
Pending legal-status Critical Current

Links

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
    • A61F2/90—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
    • A61F2/856—Single tubular stent with a side portal passage
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/06—Braid or lace serving particular purposes
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2/07—Stent-grafts
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/061—Blood vessels provided with means for allowing access to secondary lumens
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/065—Y-shaped blood vessels
    • 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
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2509/00—Medical; Hygiene
    • D10B2509/06—Vascular grafts; stents

Definitions

  • the present invention relates to a branched stent made of strand-like starting material, in particular threads and / or wires, having a main arm which has a substantially tubular main lumen, and a side arm which branches off from the main arm, wherein the side arm from a first condition where the side arm is at least partially, preferably completely, within the main lumen, to a second condition where the side arm is external to the main lumen, the side arm being a substantially tubular side lumen in the second condition which is in fluid communication with the main lumen. Furthermore, the invention relates to a stent system with a branched stent and a side stent.
  • a stent prosthesis with a tubular body is known.
  • Stent prostheses are used in lumens of the human or animal body to repair or protect the wall of a vessel of a human or animal patient, for example, to span an aneurysm in the vessel.
  • the stent graft has at least one opening in the tubular body and a flexible side arm disposed thereon.
  • the tubular body defines a main lumen therethrough and the flexible side arm is attached as a separate part sealingly around at least one lateral opening of the main arm.
  • the flexible tubular side arm extends into the main lumen and can be turned inside out to extend from the tubular body and provide a tubular side arm in fluid communication with the main lumen.
  • EP 1 791 498 B1 discloses a release device for releasing the abovementioned stent prosthesis.
  • a disadvantage of the stent prosthesis disclosed in EP 1 791 498 B1 is that the time-consuming release device must be used for its release.
  • the flexible side arm fulfills no or only a slight support effect in the region of the opening in the tubular body.
  • a branched stent is proposed from strand-like starting material, in particular threads and / or wires, with a main arm, which has a substantially tubular main lumen, and a side arm, which branches off from the main arm.
  • the branched stent may also have more than one side arm, the following description also applies analogously to a plurality of side arms.
  • the side arm may be transitioned from a first state to a second state.
  • the first state the side arm lies at least partially, preferably completely, within the main lumen.
  • the first state thus serves to simply bring the branched stent to the desired position in the lumen of the vessel. Because the side arm lies in the first state within the main lumen, the side arm in no way disturbs the positioning of the branched stent in the lumen.
  • the second Condition the side arm is outside the main lumen. This condition has the side arm when it is used in the body as appropriate.
  • the side arm then projects from the lumen of the main vessel into the lumen of a branch vessel.
  • the side arm defines a substantially tubular side lumen therethrough which is in fluid communication with the main lumen.
  • an opening is provided which allows fluid communication with the side arm.
  • the side arm comprises a shape memory material.
  • the shape memory material has two advantages: on the one hand, the shape memory effect enables an easier release of the branched stent. On the other hand shape memory materials always have a certain modulus of elasticity and thus give the side arm stability, whereby the side arm and the transition region receives a supporting effect.
  • the shape stored in the shape-memory material of the side arm corresponds to the second state in which the side arm lies outside the main lumen.
  • the release of the side arm can thus take place by assuming the shape stored in the shape memory material.
  • a holding means is provided, which is in operative connection with the side arm and holds the side arm in the first state.
  • the side arm is initially held in the first state, so that the branched stent can be easily positioned in the vessel. If the holding means is now released, the side arm takes up the shape stored in the shape memory material.
  • the shape stored in the shape-memory material corresponds to the second state, the transition from the first to the second state can therefore be effected simply by releasing the holding means.
  • threads may be used as holding means, which at certain points of the thread tenarms are tied and hold the side arm in the first state.
  • other holding means known to the person skilled in the art.
  • the main arm also comprises a shape memory material.
  • a shape memory material allows for easier release of the branched stent and provides some stability to the main arm.
  • the shape memory material of the main arm is equal to the shape memory material of the side arm. On the one hand, this is accompanied by the same physical properties, for example expansion upon heating.
  • the human or animal body need only accept a shape memory material - with two different shape memory materials, the likelihood that at least one of them will be repelled by the human or animal body would be significantly greater.
  • the advantageous production of the stent by means of lichens is thereby simpler to carry out.
  • a further holding means which holds the main arm in a compressed state. Only in a compressed state, a simple positioning of the main arm in the vessel is possible.
  • the further holding means then holds the main arm in the compressed state and after releasing the holding means, the main arm returns to its original, unfolded state.
  • the main arm is integrally formed with the side arm. This allows increased stability and supporting action of the side arm, in particular in the region of the transition from the main arm to the side arm. Characterized in that the main arm is formed integrally with the side arm, so for example, the orientation of the side arm can be specified in relation to the main arm.
  • the branched stent is textile-like. Textile-like work is understood here as meaning, for example, weaving, weaving, knitting or knitting.
  • the strand-shaped starting material that is to say, for example, threads as well as wires or other, strand-like starting material of a very wide variety of materials, can be worked in a textile-like manner.
  • the desired properties of the branched stent in particular compressibility, elasticity and stability, can be achieved by a clever combination of the strand-shaped starting material, for example with regard to material and thickness, with the textile-like working technique.
  • the branched stent especially on a braider with adjustable points, braided.
  • a braided, branched stent has particularly good properties with regard to elasticity and stability.
  • the branched stent can also be braided particularly fast. In this case, it is possible, for example, to start braiding from one end of the main arm. In this case, a certain number of threads or wires is braided.
  • the threads or wires are now divided into two groups: from one group, the rest of the main arm is braided to the other end of the main arm. From the other group, the side arm is braided.
  • the side arm is preferably initially braided longer than it is finally. The side arm is then shortened to the required length.
  • ends of the starting material in particular of the wires from which the branched stent is braided, are connected to loops.
  • threads may be attached to loops at the end of the side arm as holding means which hold the side arm in the first state.
  • the side arm branches off at an acute angle from the main arm.
  • the exact angle depends on the anatomical conditions.
  • the angle corresponding to the anatomical conditions can also be supported.
  • the correct angle is created by sintering the mesh over a core having the correct angle.
  • Nitinol is characterized both by its superelasticity and by its good body tolerance.
  • the branched stent has a coating, preferably a coating with a medicament and / or with an active ingredient.
  • these can be medicines designed to prevent the branched stent from being rejected by the human or animal body, as well as medicines that are supposed to have a local effect at the position of the branched stent.
  • the main arm and the side arm have different diameters, wherein the side arm is thinner or thicker than the main arm. It can thus be optimally dealt with the anatomy or geometry predefined by the vessel and the vessel can be supported optimally. Of course, it may also be advantageous in individual cases, if the main arm and side arm have the same diameter.
  • the strand-shaped starting material of the branched stent preferably forms a mesh density varying in the course of the branched stent, then in an advantageous embodiment of the branched stent, a targeted and different supporting effect or flexibility of the branched stent can be achieved.
  • the mesh density can vary both along the longitudinal axis of the branched stent and in the main arm as compared to the lateral arm.
  • the branched stent at least partially on a radiopaque material.
  • This radiopaque material may indicate the exact position of the main and / or side arm during implantation under X-ray control.
  • it is incorporated in the form of a textile, for example interweaved as a thread, and / or is subsequently applied, for example as a coating, or introduced as an additional material into the branched stent.
  • the starting material of the branched stent comprises bioresorbable material, it may dissolve after a certain residence time in the vessel (of the human or animal body). As a result, a large supporting effect can be achieved at the beginning and as open as possible after the healing process has ended.
  • ground threads can be intrinsically stable and, for example, run through the branched stent in a largely straight line, ie not mesh forming.
  • the branched stent is at least partially surrounded by a protective cover.
  • the braid is usually open-meshed and merely holds the vessel open and supports it. If the branched stent is surrounded by a protective cover, it can additionally seal the vessel.
  • the branched stent is designed according to the preceding description, wherein said features may be present individually or in any combination.
  • a stent system with a branched stent and a side tent is proposed.
  • the branched stent according to the preceding description is formed and in particular has a main arm and a side arm.
  • a trained according to the foregoing description sidearm is usually relatively short.
  • the side arm therefore often only acts as a door opener for a side stent.
  • the diameter of an end of the side member facing the side arm is approximately equal to the diameter of the end of the side arm facing away from the main arm.
  • FIG. 1 a shows a schematic view of a branched stent
  • FIG. 1b shows another schematic view of the branched stent
  • FIG. 1 a shows a schematic view of a stent system
  • Figure 2a is an end view of a side arm
  • Figure 2b shows another end view of the side arm of Figure 2a
  • FIG. 2c shows a further end view of the side arm from FIG. 2a
  • Figure 3a is an end view of a branched stent with different
  • FIG. 3b shows an end view of a branched stent with ground threads
  • FIG. 3c shows an end view of a branched stent with a radiopaque material
  • FIG. 3d shows an end view of a branched stent with a protective cover
  • FIG. 4 is a summary of another embodiment of the invention.
  • FIG. 4 a shows a branched wire mesh
  • FIG. 1a shows a branched stent 1 with a main arm 2 and a side arm 3 shown in dashed lines.
  • the main arm 2 has a substantially tubular main lumen 4.
  • the main arm 2 is made of a shape-memory material, for example Nitinol, preferably with a drug coating, and is held in a somewhat compressed state by a further holding means, not shown here, so that it can easily be brought to a position determined for it. In the compressed state, the main arm 2 can be somewhat longer than in its later, second state, in which the side arm 3 lies outside the main lumen 4 (FIG. 1 b).
  • the side arm 3 is made in one piece with the main arm 2 and thus also from the shape memory material.
  • the branched stent 1 is textile-like, in particular by braiding, worked.
  • braiding on a braider with adjustable turnouts has the great advantage that intersections can be interlaced, with which a hole in the interstice of the branch between the side arm 3 and the main arm 2, which can arise in a braiding without crossovers, is avoided. A good finish and largely consistently tight braided connection of the side arm to the main arm is thus given.
  • the side arm 3 is held in a first state by a holding means 5 shown, for example, in FIGS. 2a and 2b. In this first state, the side arm 3 is completely within the main lumen 4, so that it causes no problems in positioning the branched stent 1 in a vessel of the human or animal body.
  • the holding means 5 and optionally further holding means are released so that the main arm 2 and the side arm 3 can deploy.
  • the unfolding of the Side arm 3 transfers the side arm 3 from its first state to its second state, in which the side arm 3 lies outside the main lumen 4.
  • the branched stent 1 after unfolding is shown in FIG. 1b.
  • the side arm 3 now defines a substantially tubular side lumen 6 therethrough which is in fluid communication with the main lumen 4.
  • the side arm 3 branches at an acute angle a from the main arm 2, but is so short that it does not have a sufficient effect in individual applications in a vessel. Due to the acute angle a, the shape of the stent 1 of the branch of the main vessel into the side vessel in the body can be optimally adapted.
  • the side arm 3 can in this case serve as a kind of door opener for a side stent 7, which then also has a sufficient supporting function for the vessel.
  • a stent system 8 with a branched stent 1 and a side stent 7 is shown in FIG. 1c.
  • the side stent 7 is shown by dashed lines for clarity.
  • the side stent 7 In order to position the side stent 7 in the side vessel, it is guided in a compressed state through the main arm 2 and the side arm 3 functioning as a door opener in this case.
  • the side stent 7 In the unfolded state, the side stent 7 closes with the side arm 3, thus extending the supporting effect in the side vessel.
  • An end of the side stent 7 pointing to the side arm 3 of the stent 1 has approximately the same diameter as the end of the side arm 3 facing away from the main arm 2.
  • a smooth and well-terminating transition from the side arm 3 to the side stent 7 is achieved. This avoids a risk of injury to the vessel and the supporting effect of the vessel can be created throughout.
  • Figure 2a shows an end view of a braided side arm 3 in the first state.
  • the ends of the wires 9 of the side arm 3 are connected to loops 10.
  • 10 holding means 5 are connected in the form of threads on the loops. These holding means 5 are shown by dashed lines for clarity.
  • the holding means 5 are slightly loosened, the end of the side arm 3 unfolds. This is shown in FIG. 2b.
  • the side arm 3 then preferably resumes its shape stored in the shape memory material and can unfold into the side vessel.
  • FIG. 2c the holding means 5 were completely removed, so that the side arm 3 could unfold completely into the second state.
  • the holding means 5 can be removed for example via the main arm 2 from the vessel.
  • meshes of the stents 1 are indicated by a net-like hatching. They are intended to symbolize the textile-like working technique, in particular the braiding, in the production of the stent 1.
  • FIG. 3a shows an end view of a branched stent 1 with different mesh density. While in the main arm 2 mesh 11 a with a large mesh size, ie a low mesh density, are indicated, located in the side arm 3 mesh 11 b with a smaller mesh size, ie a high mesh density.
  • FIG. 3b shows an end view of a branched stent 1 with ground threads 12.
  • the ground threads 12 stiffen and reinforce the branched stent 1 in the longitudinal direction of the main arm 2 and the side arm 3. You can of course also be arranged in a larger or smaller number than shown here in the branched stent 1.
  • the ground threads are essentially straightforward. In particular, care should be taken that they do not hinder the deployment of the side arm 3 in its second state.
  • FIG. 3 c shows an end view of a branched stent 1 with a radiopaque material 13 located in the side arm 3. It may, as indicated here, be an additional thread or wire. But it is also a radiopaque coating of a part or the entire side arm 3 possible. Alternatively, one or more of the meshed starting materials of the branched stent 1 may consist of a radiopaque material 13. This material 13 makes it possible to optimally position the branched stent 1 in the vessel during the operation under x-ray control.
  • FIG. 3d shows an end view of a branched stent 1 with a protective cover 14.
  • the protective cover 14, which is preferably impervious to fluids, surrounds the textile-like branched stent 1 and thus causes the vessel to be supported by means of the branched stent 1 should, in addition, can be sealed.
  • Figures 4a to 4i show a summary of another embodiment of the invention in the manner of a poster. It shows a branched, tubular wire mesh of the branched stent 1 and the unfolding of a side arm 3 of the branched stent 1.
  • the application of the invention with reference to a particularly advantageous embodiment is briefly described.
  • Figure 4a shows a branched wire mesh
  • Figures 4b to 4e show a stent unfolding.
  • Figures 4f to 4i show a "door opener" operating principle, with Figure 4f drawing the side arm into the main arm, Figure 4g mounting and compressing the stent onto a flare catheter, Figure 4h, positioning the stent, retracting the flare catheter, resulting in the main branch unfolds and then unfold the side arm into a bifurcation and Figure 4i shows the displacement and deployment of the second stent via a turtle neck in the side branch.
  • Coronary stents are commercially available in a variety of designs and are already being used with great success. However, the uncomplicated and safe treatment of stenoses in the area of coronary bifurcations poses a problem.
  • the material selected is the superelastic nickel-titanium alloy nitinol, which, in conjunction with the braiding technology used, generates the desired flexibility and at the same time allows for independent, radial expansion of the stent.
  • the transition area to the side branch is realized in the implemented concept with the aid of two individual stents, whereby a stent is provided with a technique that functions as a "door opener".
  • a stent is provided with a technique that functions as a "door opener”.
  • a Y-shaped hose mesh is produced.
  • the resulting side arm is pulled into the main arm like a bud. Afterwards the stent is compressed, positioned in the main branch and unfolded.
  • the bud-like retracted side arm unfolds, opening and stabilizing the path to the side vessel.
  • a second stent with simple tube geometry is inserted in the next step via the "door opener" into the side branch.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

La présente invention concerne un stent ramifié (1) composé d'un matériau de départ en forme de brin, en particulier en forme de fils et/ou de filaments (9), comprenant un bras principal (2) qui présente une lumière principale (4) sensiblement tubulaire et un bras latéral (3) bifurquant du bras principal (2), le bras latéral (3) pouvant passer d'un premier état, dans lequel le bras latéral (3) se situe au moins partiellement, de préférence entièrement, à l'intérieur de la lumière principale (4), à un second état dans lequel le bras latéral (3) se situe à l'extérieur de la lumière principale (4), le bras latéral (3) présentant, dans le second état, une lumière latérale (6) sensiblement tubulaire qui est en communication fluidique avec la lumière principale (4). Selon l'invention, le bras latéral (3) comprend un matériau à mémoire de forme. L'invention concerne en outre un système de stent (8) comprenant un stent ramifié (1) selon la description ci-dessus et un stent latéral (7), le stent ramifié (1) présentant un bras principal (2) et un bras latéral (3) et le diamètre d'une extrémité du stent latéral (7) étant à peu près égal au diamètre de l'extrémité du bras latéral (3) opposée au bras principal (2).
EP19721202.0A 2018-04-11 2019-04-11 Stent ramifié et système de stent Pending EP3773357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018108584.2A DE102018108584A1 (de) 2018-04-11 2018-04-11 Verzweigter Stent und Stentsystem
PCT/EP2019/059322 WO2019197565A1 (fr) 2018-04-11 2019-04-11 Stent ramifié et système de stent

Publications (1)

Publication Number Publication Date
EP3773357A1 true EP3773357A1 (fr) 2021-02-17

Family

ID=66379870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19721202.0A Pending EP3773357A1 (fr) 2018-04-11 2019-04-11 Stent ramifié et système de stent

Country Status (5)

Country Link
US (1) US11617668B2 (fr)
EP (1) EP3773357A1 (fr)
CN (1) CN112165920B (fr)
DE (1) DE102018108584A1 (fr)
WO (1) WO2019197565A1 (fr)

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5571135A (en) * 1993-10-22 1996-11-05 Scimed Life Systems Inc. Stent delivery apparatus and method
AT400912B (de) * 1994-07-05 1996-04-25 Tomco Handelsges M B H Pflanzstab-fixiereinrichtung
US7220275B2 (en) * 1996-11-04 2007-05-22 Advanced Stent Technologies, Inc. Stent with protruding branch portion for bifurcated vessels
EP2294989B1 (fr) * 1999-02-01 2018-11-14 Board Of Regents, The University Of Texas System Procédés de fabrication de dispositifs intravasculaires tissés
AU2003279704A1 (en) * 2000-12-27 2004-04-08 Advanced Stent Technologies, Inc. Stent with protruding branch portion for bifurcated vessels
US20030097169A1 (en) * 2001-02-26 2003-05-22 Brucker Gregory G. Bifurcated stent and delivery system
DE102012016301B3 (de) * 2012-08-16 2013-12-12 Admedes Schuessler Gmbh Verfahren zum Herstellen eines Körperimplantats
US8298280B2 (en) 2003-08-21 2012-10-30 Boston Scientific Scimed, Inc. Stent with protruding branch portion for bifurcated vessels
EP1791498B1 (fr) * 2004-09-22 2018-02-28 Cook Medical Technologies, LLC Endoprothese avec bras lateral integral
WO2006053270A2 (fr) * 2004-11-10 2006-05-18 Boston Scientific Limited Endoprothese vasculaire atraumatique a force de deploiement reduite, procede de fabrication de cette derniere et procede et appareil de deploiement et de positionnement de l'endoprothese vasculaire
WO2007008533A1 (fr) * 2005-07-07 2007-01-18 Med Institute, Inc. Endoprothese vasculaire bifurquee
US8043366B2 (en) * 2005-09-08 2011-10-25 Boston Scientific Scimed, Inc. Overlapping stent
US8778008B2 (en) * 2006-01-13 2014-07-15 Aga Medical Corporation Intravascular deliverable stent for reinforcement of vascular abnormalities
US20080161901A1 (en) * 2006-01-25 2008-07-03 Heuser Richard R Catheter system with stent apparatus for connecting adjacent blood vessels
CA2649705C (fr) * 2006-04-19 2015-12-01 William A. Cook Australia Pty. Ltd Greffon de stent bifurque double
DE102007063267A1 (de) * 2007-12-17 2009-06-18 Aesculap Ag Gewebte textile Gefäßprothese
AU2009236062A1 (en) * 2008-04-18 2009-10-22 Cook Medical Technologies Llc Branched vessel prosthesis
FR2959247B1 (fr) * 2010-04-26 2012-06-08 Mdb Texinov Sa Textile a memoire de forme et procede pour sa realisation
US9393140B2 (en) * 2012-04-27 2016-07-19 Medtronic Vascular, Inc. Reconfigurable stent-graft delivery system and method of use
DE102012103986A1 (de) * 2012-05-07 2013-11-07 Jotec Gmbh Abdominale Bifurkationsprothese
DE102012111225A1 (de) * 2012-11-21 2014-05-22 Jotec Gmbh Gefäßimplantat mit Seitenast
EP3068339B1 (fr) * 2014-12-18 2017-11-01 Endospan Ltd. Stent-greffe endovasculaire avec tube lateral resistant a la fatigue

Also Published As

Publication number Publication date
DE102018108584A1 (de) 2019-10-31
WO2019197565A1 (fr) 2019-10-17
CN112165920A (zh) 2021-01-01
CN112165920B (zh) 2024-05-28
US11617668B2 (en) 2023-04-04
US20210030569A1 (en) 2021-02-04

Similar Documents

Publication Publication Date Title
EP2613743B1 (fr) Implant destiné à influencer le débit sanguin en cas de malformations artérioveineuses
DE3250058C2 (fr)
DE102012101103B3 (de) Stentgraft mit Fixierelementen und Einführsystem
EP3897454B1 (fr) Dispositif pour introduire et mettre en place un implant dans un vaisseau sanguin
EP1653883B1 (fr) Stent destine a l'implantation dans un vaisseau sanguin, en particulier dans la region de la crosse de l'aorte
EP3389511B1 (fr) Implant
EP3065676B1 (fr) Stent avec élément de retenue
WO2014026870A9 (fr) Dispositif implantable destiné à être utilisé dans un corps humain et/ou animal pour remplacer un clapet organique
EP0592726A1 (fr) Cathéter avec un support vasculaire
WO2016062665A2 (fr) Stent destiné à servir de tuteur à une veine et système pour poser un stent
WO2009077845A2 (fr) Implant de soutien, notamment endoprothèse vasculaire, et cathéter de greffage pour implant de soutien
WO2014202645A1 (fr) Endoprothèse
EP2846732B1 (fr) Prothèse vasculaire intraluminale à fenestration in situ
EP3320862B1 (fr) Dispositif de positionnement et de libération d'un implant de fermeture de l'auricule gauche
EP2822514B1 (fr) Tuteur vasculaire à haute flexibilité présentant un point de rupture
WO2013167492A1 (fr) Prothèse vasculaire intraluminale à fenestration in situ
DE102004062296A1 (de) Vorrichtung zum Positionieren eines Stents
EP3773357A1 (fr) Stent ramifié et système de stent
DE202013105452U1 (de) System zum Verbinden eines medizinischen Implantats mit einer Einführhilfe
EP2991594B1 (fr) Ensemble poussoir pour un système d'introduction pour un implant vasculaire auto-expansible
DE102017123461A1 (de) Expandierbares Gefäßimplantat
EP3130316A1 (fr) Catheter de largage, enveloppe de catheter et systeme de catheter
WO2021028286A1 (fr) Prothèse vasculaire
EP4009918A1 (fr) Implant muni d'une structure tridimensionnelle

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

Free format text: ORIGINAL CODE: 0009012

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20201030

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20240710