DE102015122679A1 - Medical implant and set - Google Patents

Medical implant and set

Info

Publication number
DE102015122679A1
DE102015122679A1 DE102015122679.0A DE102015122679A DE102015122679A1 DE 102015122679 A1 DE102015122679 A1 DE 102015122679A1 DE 102015122679 A DE102015122679 A DE 102015122679A DE 102015122679 A1 DE102015122679 A1 DE 102015122679A1
Authority
DE
Germany
Prior art keywords
flow divider
support body
end
implant
particular
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
DE102015122679.0A
Other languages
German (de)
Inventor
Andreas Schüssler
David Klopp
Viktor Heit
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.)
Acandis GmbH and Co KG
Original Assignee
Acandis GmbH and Co KG
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 Acandis GmbH and Co KG filed Critical Acandis GmbH and Co KG
Priority to DE102015122679.0A priority Critical patent/DE102015122679A1/en
Publication of DE102015122679A1 publication Critical patent/DE102015122679A1/en
Application status is Pending legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12022Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12099Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
    • A61B17/12109Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
    • A61B17/12113Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
    • A61B17/12118Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm for positioning in conjunction with a stent
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/823Stents, different from stent-grafts, adapted to cover an aneurysm

Abstract

The invention relates to a medical implant for treating a local lesion in a vessel, in particular for aneurysm treatment, with a tubular support body (10) which is compressible and expandable, wherein the support body (10) has a first porosity. The invention is characterized in that the support body (10) has at least one flow divider (11) with a flow-dividing end (12) and a wall (13) tapering towards the end (12) and connected to the support body (10) is and has a second porosity, which is smaller than the first porosity, wherein the end (12) of the flow divider (11) in the radial direction with respect to the tubular support body (10) in the lumen (14) of the support body (10) protrudes and / or wherein the end (12) of the flow divider (11) in the radial direction with respect to the tubular support body (10) protrudes beyond the outer periphery of the tubular support body (10).

Description

  • The invention relates to a medical implant according to the preamble of claim 1 and a set with such an implant. Such an implant is for example off EP 1 620 047 B1 known.
  • For the treatment of vascular lesions, such as aneurysms, endovascular implants or devices such as stents are used. For the occlusion of the aneurysm u.a. the blood flow into the aneurysm lowered. For this purpose, such implants on outer walls with a low porosity and are, for example, as so-called. Stent grafts with a relatively dense cover, for example, formed of metal. Such covers are inflexible and make it difficult to compress the stent. The rigid cover interferes with the flexibility of the stent in tight vessel bends and thus limits the treatment spectrum.
  • The aforementioned EP 1 620 047 B1 suggests applying a thin, perforated metal foil to a support framework. By the perforation of the film increased flexibility should be provided so that the film can easily adapt to vessel curvatures. As a disadvantage, the connection between the film and the stent has proven to be disadvantageous. The arrangement of the film on the lattice structure is complex and requires additional manufacturing steps.
  • Moreover, there is a risk that the film will curl due to the perforations, thereby increasing the risk of thrombosis and making it difficult to deliver the stent through a catheter. The corrugation comes about through longitudinal slots of the film, which are aligned parallel to the longitudinal axis of the stent. The slots stretch more than the stent itself when compressing the stent, which can lead to the corrugation of the foil.
  • Lesions in the area of bifurcations, ie in the area of vascular branches, such as bifurcation aneurysms, present a particular challenge. In conventional catheter systems, implants are placed in the main feeding vessel as well as in one of the outgoing side vessels. A safe and effective positioning of an implant in the area of the aneurysm in this case is very complicated to impossible.
  • The invention is based on the object to provide a medical implant for the treatment of a local lesion in a vessel, in particular for aneurysm treatment, which allows a distraction of the blood flow away from the lesion, in particular from the aneurysm away, while maintaining the flexibility of the implant as possible should. If possible, the implant should also be suitable for the treatment of lesions in the region of bifurcations, without being limited thereto. The invention is further based on the object to provide a kit comprising an implant and a catheter system, which allows the treatment of lesions in the region of bifurcations.
  • According to the invention, the object is achieved with regard to the implant by the subject of claim 1. With regard to the set, the object is achieved according to the invention by the subject matter of claim 11.
  • The invention is based on the idea of specifying a medical implant for treating a local lesion in a vessel, in particular for aneurysm treatment, which has a compressible and expandable tubular support body. The support body has a first porosity. The support body has a flow divider with a flow dividing end and a wall tapering towards this end. The wall is connected to the support body and has a second porosity which is smaller than the first porosity. The end of the flow divider protrudes in the radial direction relative to the tubular support body into the volume of the support body. Alternatively, the end of the flow divider in the radial direction with respect to the tubular support body protrudes beyond the outer periphery of the tubular support body.
  • The invention has the advantage that a targeted deflection of the blood flow is performed by a locally arranged flow divider instead of the large-area coverage. The local flow divider obstructs the flexibility and crimpability of the tubular support body much less than a large area cover that extends the entire length and circumference of the flow divider. Moreover, the perforators are kept open. The flow divider has a profile which is adapted to divert the total flow impinging on the flow divider into two partial flows, whereby a flow shadow is formed on the opposite side of the flow divider. In the flow shadow of the flow divider not only the flow velocity is significantly reduced, but also the flow pressure on the aneurysm and located directly on the Aneurysmahals vessel sections.
  • In the implanted state, the flow divider is arranged so that the aneurysm to be treated lies in the flow shadow of the flow divider. This reduces the exchange of blood between the aneurysm and the surrounding vessel so that the blood in the aneurysm can coagulate more quickly. According to the invention, the Flow divider to a flow dividing end and a tapered towards the end wall, which is connected to the support body and has a second porosity, which is smaller than the first porosity. The flow dividing end forms the outermost end of the flow divider, at which the wall tapering towards the end converges. The partial flows forming at the flow dividing end are deflected by the wall. Due to its porosity, which is less than the porosity of the surrounding support body, the wall allows less blood to pass through than the surrounding support body.
  • According to the invention, there are two possibilities for the arrangement of the flow divider on the support body:
    The flow dividing end protrudes in the radial direction relative to the tubular support body into the lumen of the support body. The flow divider is arranged on the inner circumference of the support body. Thus, the inside of the implant is profiled, so that the blood can flow through the support body into the implant and is deflected there. Alternatively, the flow dividing end protrudes in the radial direction with respect to the tubular support body beyond the outer periphery of the tubular support body. In this arrangement, the outside of the implant is profiled, so that the blood is divided into two sub-streams and deflected before flowing into the implant. If two flow dividers are arranged, for example, in series one after the other, the two arrangements can be combined on the inner circumference and on the outer circumference of the support body.
  • Preferred embodiments of the invention are specified in the subclaims.
  • Thus, the flow divider may be conical or wedge-shaped, wherein the flow dividing end is formed by the conical or wedge tip of the flow divider. The conical flow divider is suitable for the treatment of aneurysms with essentially round neck openings. The wedge-shaped flow divider is intended for aneurysms with elongated neck openings. Other geometry of the flow divider, which allow local treatment of aneurysms, are conceivable. For example, patient-specific flow dividers can be designed, which are created on the basis of the respective vascular anatomy.
  • Preferably, the flow divider is fixedly connected to a cylindrical wall portion of the support body. This ensures safe treatment. Alternatively, the flow divider may be releasably connected to the cylindrical wall portion of the support body. This has the advantage that the flow divider forms a separate component, which is connected after implementation with the support body. This embodiment allows for flexible handling of the implant during implantation, since the support body and the flow divider are supplied separately and connected in situ.
  • In a preferred embodiment, in the support body on a protruding into the lumen wall recess, which forms the flow divider. This embodiment is particularly easy to manufacture, because for the formation of the flow divider, the wall of the support body is deformed. The flow divider and support body are thus formed in one piece and monolithic. Preferably, the support body is made of a shape memory material, so that the formation of the wall recess can be achieved by a corresponding conditioning and heat treatment of the support body.
  • The support body may have a wall recess protruding into the lumen, which forms a receptacle whose shape corresponds to the flow divider. In the recording of the flow divider is arranged as a separate component. This embodiment has the advantage that the compaction in the region of the wall recess is not effected by a modification of the support body but by the arrangement of the separate flow divider, which as a separate component is simply provided with a different porosity, i. can be made with a lower porosity than the support body.
  • The flow divider may have distributed on its circumference arranged fins, which converge in the end of the flow divider. By the distance of the slats to each other or through the slat width, the porosity of the flow divider is determined in a simple manner.
  • The flow divider may have circumferentially extending slots. The slots can be made for example by laser cutting or etching.
  • The flow divider and / or the support body can be constructed asymmetrically.
  • The flow divider may preferably have a wall thickness of at most 30 μm, in particular at most 20 μm, in particular at most 10 μm. The support body may preferably have a wall thickness of at most 70 μm, in particular at most 50 μm, in particular at most 30 μm. Such implants can be produced by thin-layer methods, for example PVD methods such as sputtering, and are characterized by high flexibility and good miniaturization, so that these implants are particularly well suited for neurovascular treatments.
  • The flow divider can be produced by a shaping process in which the shaping is impressed by means of a tool by a heat treatment, in particular between about 450 ° C and 650 ° C. The starting structure may be a flow divider made by sputtering technology. This embodiment is particularly preferred.
  • Alternatively, the flow divider may be formed by textile manufacturing techniques, for example braided or woven. Furthermore, it is possible to produce the flow divider by laser technology, in particular by laser cutting. K.
  • According to the independent claim 11, the invention is based on specifying a kit which comprises an implant according to the invention and a catheter system for feeding and discharging the implant in the region of a vessel bifurcation, in particular for treating an aneurysm in the region of the vessel bifurcation. The catheter system has a first guide element for feeding and discharging the implant. A second guide element or at least a part of the second guide element forms, together with the first guide element, at least when the implant is discharged, a Y-shaped fork. The first guide element can be manipulated by the second guide element or by at least a part of the second guide element. The invention has the advantage that the implant according to the invention can be discharged with the catheter system in the region of a bifurcation so that the implant can be placed in the two outgoing vessels of the bifurcation. Thus, the flow divider can be positioned immediately above or in front of the aneurysm, so that an effective treatment of the aneurysm is possible in a simple manner.
  • In this context, it is particularly advantageous if the support body has an anchoring element which is geometrically associated with the flow divider. For example, it may be arranged anchoring element in the same place as the flow divider, wherein the flow divider projects inwardly into the lumen of the support body and protrudes into the anchoring element for anchoring the support body in the vessel in the expanded state on the support body and is adapted to aneurysm to engage the alignment of the support body. In the geometric assignment can also be done so that the anchoring element and the flow divider are arranged offset on the circumference and / or in the longitudinal direction of the support body.
  • The invention will be explained in more detail below with reference to embodiments with further details with reference to the accompanying schematic drawings.
  • In this show:
  • 1 an inventive embodiment of an implant, wherein the flow divider is disposed within the support structure and fixedly connected thereto;
  • 2 an inventive embodiment of an implant, wherein the flow divider is designed as a separate component, which is arranged within the support structure;
  • 3 the embodiment of the implant according to 2 in which the separate flow divider forms a variant;
  • 4 an inventive embodiment in which the flow divider is connected as a separate component from the outside to the support structure;
  • 5 an inventive embodiment in which the flow divider is arranged on the outer circumference of the support body;
  • 6 an inventive embodiment in which the flow divider is formed by a deformation and compression of the wall of the support body;
  • 7 an embodiment according to the invention, in which the support body is designed as a flow diverter and a lower porosity (opening) for the inflow of the feeding vessel now now now facing side may have;
  • 8th an inventive embodiment in which the flow divider is formed asymmetrically;
  • 9 a view of a flow divider whose wall is formed of lamellas;
  • 10 a view of a flow divider, the wall of which has slots; and
  • 11 a view of a catheter system, which is suitable together with the implant according to the invention for the treatment of Bifurkationsaneurysmen.
  • 1 shows an example of a medical implant, which is suitable for aneurysm treatment, in particular for the treatment of aneurysms in the region of a vessel bifurcation. The implant is not limited to the treatment of aneurysms or bifurcation aneurysms, but can generally be used to treat lesions in which a distraction of the blood flow for therapeutic purposes should be achieved.
  • The stent-like implant has a tubular support body 10 on. The supporting body 10 has the function of anchoring the implant in a conventional manner in a vessel. For this purpose, the support body from a compressed state by discharging from a catheter is expandable and attaches to the vessel wall. By acting on the vessel wall radial force of the support body dislocation of the implant is avoided.
  • The support body has a first porosity that is adjusted so that the blood can flow through the support body. For this purpose, the support body has a lattice structure which is designed, for example, as a mesh or as a laser-cut lattice structure or as a thin-layer structure. Such lattice structures are known from stent technology. The mesh size or cell size of the lattice structure and the wire thickness or web width of the lattice structure determine their porosity.
  • The tube shape of the support body 10 means that this at least partially has a substantially cylindrical shape.
  • The supporting body 10 has at least one flow divider 11 on, which is connected with this. As in 1 shown has the flow divider 11 a flow dividing end 12 and one to the end 12 towards the rejuvenating wall 13 , In the example according to 1 is the flow divider 11 executed as a conical structure, the apex of which the flow dividing end 12 forms. The lateral surface of the flow divider 11 make that the end 12 or to the apex tapered wall 13 of the flow divider 11 , The wall 13 has another, in particular a lower porosity than the porosity of the support body 10 on. This is according to the example 1 realized by the fact that the wall 13 of the flow divider 11 is formed of a lattice structure whose porosity is smaller than the porosity of the surrounding support body 10 is. The wall 13 For example, can be designed as a mesh whose mesh size is smaller than the mesh size of the surrounding support body 10 is. The same applies to the formation of the wall 13 as a web-shaped lattice structure, which is produced for example by a thin-film process or by laser cutting.
  • Generally, the support body 10 a continuous wall, in particular a cylindrical wall, which also in the region of the flow divider 11 extends so that the implant in the area of the flow divider 11 is formed double-walled. This has the advantage that in the treatment of an aneurysm introduced into the aneurysm coils are securely retained there. This embodiment of the implant has the further advantage of simple production.
  • Further generally, the support body 10 have a discontinuous wall which is interrupted in the region of the flow divider. Specifically, the wall may have a recess corresponding to the base of the flow divider. This improves the crimpability of the implant.
  • Further generally, the support body may have a continuous wall with a profile in which it is deformed into the wall. In this case, the wall itself can form the flow divider or a receptacle for a separate flow divider.
  • In the example according to 1 is the flow dividing end 12 Specifically, the cone tip in the radial direction from the inner surface of the support body 10 objected. In other words, the flow divider protrudes 11 into the lumen 14 of the support body 10 into it. Thus, the implant has a profiled inner circumference, which is locally adapted so that aneurysm located in this area can be treated specifically.
  • The attachment of the flow divider 11 on the support body 10 takes place through the wall 13 whose base is with the support body 10 connected is. The connection is in the example according to 1 firmly and can be done for example by cohesive bonding techniques, such as laser welding, gluing, etc., or by mechanical joining techniques, we crimping or braiding. The geometry of the flow divider 11 is not limited to the cone shape. Other geometry, such as wedge-shaped flow dividers are possible. The geometry of the flow divider 11 It can be adapted to the shape of the aneurysm, specifically to the shape of the aneurysm's neck.
  • The starting example according to 2 differs from 1 in that the flow divider 11 is designed as a separate component, after positioning the support body 10 supplied in the vessel and and with the support body 10 is subsequently connected. In other words, in the first step, the support body 10 without the flow divider 11 positioned in the area of the aneurysm. In the second step then the flow divider 11 supplied and with the support body 10 connected.
  • The flow divider 11 in this case can be similar to the flow divider 11 according to 1 be formed, with the difference that the flow divider 11 according to 2 is a separate component.
  • The example according to 3 concerns, much like 2 , a separate formation of the support body 10 and the flow divider 11 , where the flow divider 11 is designed as a spiral structure. Specifically, the flow divider is 11 the wall 13 is formed by a helical wire which runs along a virtual conical surface and ends at the apex of the cone.
  • In 3 is the feed of the flow divider 11 represented by a microcatheter, wherein the flow divider 11 can be decoupled in a conventional manner from the micro-catheter or its transport wire. The flow divider 11 is how in 2 on the inner circumference of the support body 10 arranged.
  • The example according to 4 differs from the previous examples in that the support body 10 a wall recess 15 which acts as a receptacle for the flow divider 11 acts. This is the shape of the wall recess 15 to the shape of the flow divider 10 customized. In the present example, this is the cone shape. Other geometry is possible. The flow divider 11 protrudes into the lumen 14 in, but is on the outside of the support body 10 , ie on the outside of the wall recess 15 arranged. Again, different connection options are conceivable, for example, the above material-locking or mechanical connection techniques.
  • The example according to 5 illustrates the arrangement of the flow divider 11 on the outer circumference of the support body 10 , Concretely, the flow dividing end stands 12 , here the conical tip, in the radial direction relative to the tubular support body 10 beyond its outer circumference or its outer contour.
  • The flow divider 11 may be related to one of the 1 to 4 described flow divider 11 be educated.
  • The supporting body 10 according to the example 6 has a wall recess 15 on, as such, the flow divider 11 forms. The flow divider 11 and the support body 10 are integrally formed and form a corresponding profile in the lumen 14 of the support body 10 protrudes to achieve the distraction of blood flow. The wall recess 15 may have a conical or wedge-shaped geometry. This indicates the wall recess 15 like the previous examples, a flow dividing end 12 on. The flow dividing end 12 is the extreme end of the wall recess 15 in the radial direction relative to the support body 10 in its lumen 14 protrudes. The inside of the support body 10 is thus profiled to influence the flow, ie the inside of the support body 10 deviates from the basic cylindrical shape in the area of the flow divider 11 from.
  • It is conceivable, the same principle on the outside of the support body 10 apply so that the wall recess 15 not in the lumen 14 protrudes, but over the outer circumference of the support body 10 projects radially outward. This embodiment would be the basic form of the example according to 5 correspond. It is also possible to insert two each inward into the lumen 14 inwardly directed wall depressions 15 to combine with each other, as in the example according to 7 shown by a flow diverter.
  • The tapered wall 13 the wall recess 15 is through the wall of the support body 10 formed, which is deformed accordingly. The compression of the tapered wall 13 For example, by a superposition of the lattice structure of the support body 10 take place with a further lattice structure, the close-meshed or small-celled as the lattice structure of the support body 10 is. Other compression options, for example, by a thin-film, the local in the region of the wall recess 15 is appropriate, are conceivable.
  • As the example according to 7 shows, the support body can be designed as a total flow diverter with one and the same porosity. The example according to 7 is based on the invention according to the independent claim 10. Again, a wall recess 15 provided, which is formed by a deformation of the wall of the body. Since the support body has a relatively low overall porosity, the wall depression acts 15 as a flow divider 11 , Additional elements are for the flow divider 11 not mandatory.
  • 8th shows an example of an asymmetrically constructed flow divider 11 whose tip or its flow dividing end 12 is arranged eccentrically. This makes aneurysms treatable in which the aneurysm neck and the carrier vessel are offset from one another. The offset is due to the asymmetry of the flow divider 11 so that the total bloodstream coming from the carrier vessel is divided and passed by the aneurysm.
  • In 9 is an example of a flow divider 11 shown, its wall 13 from slats 16 is constructed. The slats 16 run in the flow dividing end 12 together and are connected there. The flow divider 11 has the shape of a cone. Other geometry is possible. The wall 13 ends on the flow dividing end 12 opposite side in an annular retaining element 18 that at least partially, especially with two slats 16 connected for attachment. The remaining slats 16 each have free ends which are connected to the annular retaining element 18 are adjacent, but not connected to this. The holding element 18 is with the support body 10 connected.
  • 10 shows an alternative example of a flow divider that 11 whose wall 13 several, in the circumferential direction of the flow divider the 11 running slots 17 having. The flow divider 11 is designed as a cone, whereby other geometry is possible here as well. 11 shows an example of a catheter system provided as a set together with one of the implants according to the 1 to 10 can be used.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • EP 1620047 B1 [0001, 0003]

Claims (11)

  1. Medical implant for treating a local lesion in a vessel, in particular for aneurysm treatment, with a tubular support body ( 10 ), which is compressible and expandable, wherein the support body ( 10 ) has a first porosity, characterized in that the supporting body ( 10 ) at least one flow divider ( 11 ) with a flow dividing end ( 12 ) and one to the end ( 12 ) tapering wall ( 13 ), which with the support body ( 10 ) and has a second porosity smaller than the first porosity, the end ( 12 ) of the flow divider ( 11 ) in the radial direction relative to the tubular support body ( 10 ) into the lumen ( 14 ) of the supporting body ( 10 ) and / or where the end ( 12 ) of the flow divider ( 11 ) in the radial direction relative to the tubular support body ( 10 ) over the outer circumference of the tubular support body ( 10 protruding).
  2. Implant according to claim 1, characterized in that the flow divider ( 11 ) conical or wedge-shaped and the end ( 12 ) through the cone or wedge tip of the flow divider ( 11 ) is formed.
  3. Implant according to claim 1 or 2, characterized in that the flow divider ( 11 ) fixed or detachable with a cylindrical wall portion of the support body ( 10 ) connected is.
  4. Implant according to one of the preceding claims, characterized in that the supporting body ( 10 ) one in the lumen ( 14 ) projecting wall recess ( 15 ) comprising the flow divider ( 11 )
  5. Implant according to one of the preceding claims, in particular according to one of claims 1 to 3, characterized in that the supporting body ( 10 ) one in the lumen ( 14 ) projecting wall recess ( 15 ), which forms a receptacle, the shape of the flow divider ( 11 ) and in which the flow divider ( 11 ) is arranged as a separate component.
  6. Implant according to one of the preceding claims, characterized in that the flow divider ( 11 ) arranged on its circumference arranged slats ( 16 ) in the end ( 12 ) of the flow divider ( 11 ), or the flow divider ( 11 ) extending in the circumferential direction slots ( 17 ) having.
  7. Implant according to one of the preceding claims, characterized in that the flow divider ( 11 ) and / or the supporting body ( 10 ) is constructed asymmetrically.
  8. Implant according to one of the preceding claims, characterized in that the flow divider ( 11 ) has a wall thickness of at most 30 μm, in particular at most 20 μm, in particular at most 10 μm, and / or the supporting body ( 10 ) has a wall thickness of at most 70 .mu.m, in particular at most 50 .mu.m, in particular at most 30 microns.
  9. Implant according to one of the preceding claims, characterized in that the flow divider ( 11 ) is produced by a thin-film process, in particular PVD processes such as sputtering, or by a shaping process, in which the shaping is impressed by means of a tool by a heat treatment, in particular between about 450 ° C and 650 ° C.
  10. Medical implant for treating a local lesion in a vessel, in particular for aneurysm treatment, with a tubular support body ( 10 ), which is compressible and expandable, wherein the support body ( 10 ), characterized in that the supporting body ( 10 ) at least one flow divider ( 11 ) with a flow dividing end ( 12 ) and one to the end ( 12 ) tapering wall ( 13 ), which with the support body ( 10 ) and the same porosity as the support body ( 10 ), the end ( 12 ) of the flow divider ( 11 ) in the radial direction relative to the tubular support body ( 10 ) into the lumen ( 14 ) of the supporting body ( 10 ) and / or where the end ( 12 ) of the flow divider ( 11 ) in the radial direction relative to the tubular support body ( 10 ) over the outer circumference of the tubular support body ( 10 protruding).
  11. Set comprising an implant according to claim 1 and a catheter system for feeding and discharging the implant ( 10 ) in the region of a vessel bifurcation, in particular for the treatment of an aneurysm in the region of the vessel bifurcation, with a first guide element ( 11 ) for feeding and discharging the implant ( 10 ), characterized in that a second guide element ( 12 ) or at least a part of the second guide element ( 12 ) and the first guide element ( 11 ) at least when the implant is released ( 10 ) a Y-shaped fork ( 14 ), wherein the first guide element ( 11 ) by the second guide element ( 12 ) or through at least a part of the second guide element ( 12 ) is manipulatable.
DE102015122679.0A 2015-12-23 2015-12-23 Medical implant and set Pending DE102015122679A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102015122679.0A DE102015122679A1 (en) 2015-12-23 2015-12-23 Medical implant and set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015122679.0A DE102015122679A1 (en) 2015-12-23 2015-12-23 Medical implant and set

Publications (1)

Publication Number Publication Date
DE102015122679A1 true DE102015122679A1 (en) 2017-06-29

Family

ID=59010317

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102015122679.0A Pending DE102015122679A1 (en) 2015-12-23 2015-12-23 Medical implant and set

Country Status (1)

Country Link
DE (1) DE102015122679A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6093199A (en) * 1998-08-05 2000-07-25 Endovascular Technologies, Inc. Intra-luminal device for treatment of body cavities and lumens and method of use
US20070112418A1 (en) * 2005-11-14 2007-05-17 Boston Scientific Scimed, Inc. Stent with spiral side-branch support designs
US20070191884A1 (en) * 2005-10-19 2007-08-16 Pulsar Vascular, Inc. Methods and systems for endovascularly clipping and repairing lumen and tissue defects
DE102008028308A1 (en) * 2007-10-18 2009-04-23 Acandis Gmbh & Co. Kg Vascular implant for treating cerebral posterior circulation aneurysm, has lattice structure with deflection unit forming cone with apex that faces structure or three-dimensional curvature that extends towards axial end of structure
EP1620047B1 (en) 2003-05-07 2009-11-11 Advanced Bio Prosthetic Surfaces, Ltd. Metallic implantable grafts and method of making same
US20130204290A1 (en) * 2009-09-04 2013-08-08 Pulsar Vascular, Inc. Systems and methods for enclosing an anatomical opening

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6093199A (en) * 1998-08-05 2000-07-25 Endovascular Technologies, Inc. Intra-luminal device for treatment of body cavities and lumens and method of use
EP1620047B1 (en) 2003-05-07 2009-11-11 Advanced Bio Prosthetic Surfaces, Ltd. Metallic implantable grafts and method of making same
US20070191884A1 (en) * 2005-10-19 2007-08-16 Pulsar Vascular, Inc. Methods and systems for endovascularly clipping and repairing lumen and tissue defects
US20070112418A1 (en) * 2005-11-14 2007-05-17 Boston Scientific Scimed, Inc. Stent with spiral side-branch support designs
DE102008028308A1 (en) * 2007-10-18 2009-04-23 Acandis Gmbh & Co. Kg Vascular implant for treating cerebral posterior circulation aneurysm, has lattice structure with deflection unit forming cone with apex that faces structure or three-dimensional curvature that extends towards axial end of structure
US20130204290A1 (en) * 2009-09-04 2013-08-08 Pulsar Vascular, Inc. Systems and methods for enclosing an anatomical opening

Similar Documents

Publication Publication Date Title
KR101652568B1 (en) Vascular stenting for aneurysms
US7169177B2 (en) Bifurcated stent
JP4212477B2 (en) Curved lumen prosthesis
JP5722631B2 (en) Stent having adjacent elements connected by a flexible web
US6964677B2 (en) Implantable stent
US7740653B1 (en) Single-piece endoprosthesis with high expansion ratios and atraumatic ends
US7195636B2 (en) Aneurysm neck cover for sealing an aneurysm
JP4607579B2 (en) Segmental graft embedded stent
CN101151001B (en) The catheter system for supporting a bifurcated vessel
JP4694575B2 (en) Bifurcated vascular graft design and deployment method
US5860998A (en) Deployment device for tubular expandable prosthesis
JP2006505361A (en) Endoprosthesis deployment system for treating vascular bifurcations
US20020038132A1 (en) Detachable covering for an implantable medical device
EP1512381A2 (en) Side branch stent with split proximal end
US20060100694A1 (en) Guidewire system
EP2489335A2 (en) Stent delivery system
EP1362564A1 (en) Intravascular stent device
EP1279382A1 (en) Curved stent
US7846198B2 (en) Vascular prosthesis and methods of use
US8672992B2 (en) Stent and stent-graft having one or more conformance struts
DE60031270T2 (en) System for introducing an expandable medical device
US6533807B2 (en) Radially-expandable stent and delivery system
US20080004653A1 (en) Thin Film Devices for Occlusion of a Vessel
US9402712B2 (en) Vascular remodeling device
ES2243185T3 (en) Flexible endoprotesis.

Legal Events

Date Code Title Description
R012 Request for examination validly filed
R016 Response to examination communication
R081 Change of applicant/patentee

Owner name: ACANDIS GMBH, DE

Free format text: FORMER OWNER: ACANDIS GMBH & CO. KG, 76327 PFINZTAL, DE

R082 Change of representative

Representative=s name: MEISSNER BOLTE PATENTANWAELTE RECHTSANWAELTE P, DE