DE20312113U1 - stent - Google Patents
stentInfo
- Publication number
- DE20312113U1 DE20312113U1 DE20312113U DE20312113U DE20312113U1 DE 20312113 U1 DE20312113 U1 DE 20312113U1 DE 20312113 U DE20312113 U DE 20312113U DE 20312113 U DE20312113 U DE 20312113U DE 20312113 U1 DE20312113 U1 DE 20312113U1
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- Prior art keywords
- stent
- sections
- struts
- section
- ring segments
- 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.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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
- A61F2002/91516—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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 the meander having a change in frequency along the band
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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
- A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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 characterised by the phase between adjacent bands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated 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
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91575—Adjacent bands being connected to each other connected peak to trough
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Optics & Photonics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
Description
Unser Zeichen: 25/40937-001Our reference: 25/40937-001
Qualimed Innovative Medizinprodukte GmbH Boschstraße 16. D-21423 WinsenQualimed Innovative Medical Products GmbH Boschstrasse 16. D-21423 Winsen
StentStents
Die Erfindung betrifft einen Stent gemäß den Merkmalen im Oberbegriff von Schutzanspruch 1.The invention relates to a stent according to the features in the preamble of claim 1.
Stents dienen zur permanenten oder auch nur zeitweisen Schienung von Körperröhren, die infolge einer Stenose verschlossen oder verengt sind.Stents are used for the permanent or temporary splinting of body tubes that are blocked or narrowed as a result of stenosis.
Die Stents werden durch Kathetertechniken und ähnlicher Einführhilfen in das intrakorporale Gefäß im Bereich der Stenose eingebracht. Dort fungieren sie als Gefäßprothese zur Abstützung der Gefäßinnenwände. Beim Setzen und Entfernen der Stents können jedoch die Gefäßwände traumatisiert werden. Auch im gesetzten Zustand kann ein Stent die Gefäße aufgrund der Eigenbewegung traumatisieren.The stents are inserted into the intracorporeal vessel in the area of the stenosis using catheter techniques and similar insertion aids. There they act as a vascular prosthesis to support the inner walls of the vessel. However, the vessel walls can be traumatized when the stents are inserted and removed. Even when inserted, a stent can traumatize the vessels due to its own movement.
Der Erfindung liegt daher die Aufgabe zugrunde, einen hinsichtlich der Gefäßverträglichkeit verbesserten Stent zu schaffen, bei dem die Gefahr einer Verletzung der Gefäßwände beim Setzen oder Entfernen verringert ist.The invention is therefore based on the object of creating a stent with improved vascular compatibility, in which the risk of injury to the vessel walls during insertion or removal is reduced.
Commerzbank AG BocJhurJi.Jliento-Nf 3&£4 7&2 (Bt-Z 43« 400&phgr;36) *· Pos1f>ank ^senj Kojito-Jjr. 74 47-431 (BLZ 360 100 43)Commerzbank AG BocJhurJi.Jliento-Nf 3&£4 7&2 (Bt-Z 43« 400 &phgr; 36) *· Pos1f>ank ^senj Kojito-Jjr. 74 47-431 (BLZ 360 100 43)
Die Lösung dieser Aufgabe besteht nach der Erfindung in einem Stent gemäß den Merkmalen von Schutzanspruch 1.The solution to this problem consists according to the invention in a stent according to the features of claim 1.
Danach besteht das Stützgerüst aus mindestens zwei Ringsegmenten, die aus sich über Übergangsabschnitte wellenförmig endlos aneinander schließenden Streben gebildet sind. Benachbarte Ringsegmente sind durch Verbinder gekoppelt. Jeder zweite stirnseitige Übergangsabschnitt an den in Stentlängsachse gesehen endseitigen Ringsegmenten weist ein gegenüber den benachbarten Übergangsabschnitten axial vorstehendes verbreitertes Kopfende auf, welches einen konvex gerundeten Stirnabschnitt und konkav gerundete Kehlabschnitte zwischen dem Kopfende und den mit dem Kopfende verbundenen Streben besitzt.The support structure then consists of at least two ring segments, which are formed from struts that adjoin each other in a wave-like manner via transition sections. Adjacent ring segments are coupled by connectors. Every second front-side transition section on the end ring segments, as seen in the longitudinal axis of the stent, has a widened head end that protrudes axially relative to the adjacent transition sections and has a convexly rounded front section and concavely rounded throat sections between the head end and the struts connected to the head end.
Erfindungsgemäß werden die Kopfenden durch Abrundung optimiert, um ihre atraumatische Funktion zu verbessern. Die gerundeten Kopfenden gewährleisten einen schonenden Kontakt der stirnseitigen Enden des Stents an der Gefäßwand. Beim erfindungsgemäßen Stent werden die Gefäßwände demzufolge sowohl beim Setzen als auch beim Entfernen eines Stents weniger traumatisiert.According to the invention, the head ends are optimized by rounding them in order to improve their atraumatic function. The rounded head ends ensure gentle contact between the front ends of the stent and the vessel wall. With the stent according to the invention, the vessel walls are therefore less traumatized both when placing and removing a stent.
Vorteilhafte Ausgestaltungen und Weiterbildungen des erfindungsgemäßen Stents sind in den abhängigen Ansprüchen 2 bis 8 charakterisiert.Advantageous embodiments and further developments of the stent according to the invention are characterized in the dependent claims 2 to 8.
Die Kopfenden sind vorzugsweise pilzförmig konfiguriert, wobei die konvexen Stirnabschnitte und die konkaven Kehlabschnitte durch gerundete Randabschnitte miteinander verbunden sind.The head ends are preferably configured in a mushroom shape, with the convex front sections and the concave throat sections being connected to one another by rounded edge sections.
Vorzugsweise übergreifen die Kehlabschnitte im Ausgangszustand des Stents die randseitigen Übergangsabschnitte der benachbarten Streben mindestens bereichsweise, wobei sie hinsichtlich ihrer Kontur auf die Kontur der Übergangsabschnitte angepasst sind.Preferably, in the initial state of the stent, the throat sections overlap the edge-side transition sections of the adjacent struts at least in regions, whereby their contour is adapted to the contour of the transition sections.
In einer weiteren vorteilhaften Ausgestaltung sind an den in Stentlängsachse gesehen endseitigen Ringsegmenten Umlenkelemente für einen das Stützgerüst außen umschlingenden Faden angeordnet. Die Fadenenden werden überIn a further advantageous embodiment, deflection elements for a thread that wraps around the outside of the support structure are arranged on the end ring segments as seen in the longitudinal axis of the stent. The thread ends are
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die Umlenkelemente in das Innere des Stützgerüstes umgelenkt und dort durch einen Verbinder, vorzugsweise aus einem röntgensichtbaren Material fest miteinander verbunden. Zum Entfernen des Stents können die Fadenenden am Verbinder ergriffen werden. Durch Ziehen wird der Faden eingeschnürt und hierbei das umschlungene Ringsegment des Stützgerüstes zusammengezogen, worauf der Stent aus der Körperröhre entfernt werden kann. Diese Vorgehensweise erleichtert wesentlich den Explantationsvorgang eines Stents. Insbesondere beim Entfernen eines Stents wirken die erfindungsgemäß vorgesehenen gerundeten Kopfenden positiv aus. Die Gefahr einer Verletzung der umliegenden Gefäßwände ist deutlich verringert.the deflection elements are diverted into the interior of the support structure and there firmly connected to one another by a connector, preferably made of an X-ray visible material. To remove the stent, the thread ends can be grasped on the connector. By pulling, the thread is constricted and the looped ring segment of the support structure is pulled together, whereupon the stent can be removed from the body tube. This procedure makes the explantation process of a stent much easier. The rounded head ends provided according to the invention have a positive effect, particularly when removing a stent. The risk of injury to the surrounding vessel walls is significantly reduced.
Der Stent ist im nicht expandierten Zustand äußerst flexibel und kann beim Einführen in die Körpergefäße deren Windungen problemlos folgen. In der Stenose aufgeweitet ist der Stent ausreichend stabil, um seine Funktion zu erfüllen und das notwendige Aufweitmaß beibehalten zu können.The stent is extremely flexible when not expanded and can easily follow the curves of the body's vessels when inserted. When expanded in the stenosis, the stent is sufficiently stable to fulfil its function and to be able to maintain the necessary expansion.
Wie erwähnt, sind die Ringsegmente durch Verbinder miteinander gekoppelt. Hierbei sind die Verbinder vorzugsweise strebenartig ausgebildet und weisen einen, im wesentlichen parallel zur Stentlängsachse verlaufenden Longitudinalabschnitt und einen hierzu quer ausgerichteten U-förmig konfigurierten Ausgleichsabschnitt auf.As mentioned, the ring segments are coupled to one another by connectors. The connectors are preferably designed like struts and have a longitudinal section running essentially parallel to the longitudinal axis of the stent and a U-shaped compensating section aligned transversely thereto.
Für die Praxis empfiehlt es sich, den U-förmigen Ausgleichsabschnitt der Verbinder in dem Bereich zwischen zwei axial mit Abstand benachbarten Ringsegmenten anzuordnen. In dieser Ausgestaltung besitzt der Stent ein hohes Maß an Stützkraft und ist auch bei äußerer Kompression längenstabil.In practice, it is recommended to arrange the U-shaped compensating section of the connector in the area between two axially spaced-apart ring segments. In this design, the stent has a high degree of support force and is stable in length even under external compression.
Die vorerwähnten, die Ausbildung der Verbinder betreffenden Merkmale tragen dazu bei, dass der Stent im expandierten Zustand keine ungewollte bzw. nachteilige Längenänderung erfährt.The aforementioned features concerning the design of the connectors help to ensure that the stent does not undergo any unwanted or detrimental change in length when expanded.
Die Verbinder erstrecken sich jeweils vom Firstbereich zweier Streben eines Ringsegments aus zwischen zwei Streben des benachbarten RingsegmentsThe connectors extend from the ridge area of two struts of a ring segment between two struts of the adjacent ring segment
und zwar bis zum Übergangsabschnitt dieser Streben. Auch diese Ausbildung unterstützt die Längenstabilität des Stents.up to the transition section of these struts. This formation also supports the length stability of the stent.
Vorzugsweise sind die einzelnen Verbinder zwischen den Ringsegmenten axial hintereinander ausgerichtet. Auf diese Weise entsteht im expandierten Zustand (Stützzustand) des Stents ein gering elastisches Stützgerüst mit hoher Rückstellkraft.Preferably, the individual connectors between the ring segments are aligned axially one behind the other. In this way, a slightly elastic support structure with a high restoring force is created in the expanded state (support state) of the stent.
Bevorzugt ist der Stent aus Metall gefertigt. Hierbei können alle verformbaren medizinisch möglichen Metalle bzw. Metalllegierungen zum Einsatz gelangen, z.B. Edelstahl, Kobaltlegierungen (Phynox), Reineisen oder Nickel-Titan-Legierungen. The stent is preferably made of metal. All malleable, medically possible metals or metal alloys can be used, e.g. stainless steel, cobalt alloys (Phynox), pure iron or nickel-titanium alloys.
Das Stützgerüst kann grundsätzlich zusätzlich auch in einen Mantel, z.B. aus Kunststoff, beispielsweise Latex oder ähnliches, eingebettet sein.In principle, the support structure can also be embedded in a casing, e.g. made of plastic, such as latex or similar.
Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher beschrieben. Es zeigen:The invention is described in more detail below using an embodiment shown in the drawings.
Figur 1 die Abwicklung des Stentgerüstes eines erfindungsgemäßenFigure 1 shows the development of the stent framework of an inventive
Stent im nicht aufgeweiteten Zustand (Ausgangszustand) undStent in non-expanded state (initial state) and
Figur 2 das Stützgerüst des Stents im aufgeweiteten Zustand (Stützzustand), Figure 2 the supporting framework of the stent in the expanded state (supporting state),
In den Figuren 1 und 2 ist ein erfindungsgemäßer Stent 1 jeweils in einer Abwicklung seines ansonsten tubulären Stützgerüsts 2 dargestellt. Der Stent 1 ist aus Metall gefertigt.In Figures 1 and 2, a stent 1 according to the invention is shown in a developed view of its otherwise tubular support structure 2. The stent 1 is made of metal.
Figur 1 zeigt das Stützgerüst 2 in seinem nicht aufgeweitetem Ausgangszustand A, wohingegen Figur 2 das Stützgerüst 2 im, gegenüber dem Ausgangszustand A aufgeweiteten Stützzustand S darstellt.Figure 1 shows the support structure 2 in its non-expanded initial state A, whereas Figure 2 shows the support structure 2 in the expanded support state S compared to the initial state A.
Das Stützgerüst 2 besteht aus mehreren, im hier dargestellten Ausführungsbeispiel insgesamt vier Ringsegmenten 3-6. Diese sind aus sich wellenförmig endlos aneinander schließenden Streben 7, 8 , 9, 10 gebildet, die jeweilsüber Übergangsabschnitte 11, 12 miteinander verbunden sind.The support structure 2 consists of several ring segments 3-6, in the embodiment shown here a total of four. These are formed from struts 7, 8, 9, 10 that adjoin one another in a wave-like manner and are connected to one another via transition sections 11, 12.
Jeweils benachbarte Ringsegmente 3, 4; 4, 5 und 5, 6 sind durch sich in Richtung der Stentlängsachse L erstreckende Verbinder 13 gekoppelt. Die Verbinder 13 sind strebenartig ausgebildet und besitzen einen im wesentlichen parallel zur Stentlängsachse L verlaufenden Longitudinalabschnitt 14 und einen hierzu quer ausgerichteten U-förmig konfigurierten Ausgleichsabschnitt 15. Man erkennt, dass die U- oder V-förmigen Ausgleichabschnitte 15 der Verbinder 13 jeweils im Bereich 16 zwischen zwei axial mit Abstand benachbarten Ringsegmenten 3-6 angeordnet sind. Der mittlere Verbinder 13' weist beidseitig zu seinem Ausgleichsabschnitt 15' zwei gleich lange Longitudinalabschnitte 14' auf.Neighboring ring segments 3, 4; 4, 5 and 5, 6 are coupled by connectors 13 extending in the direction of the stent's longitudinal axis L. The connectors 13 are designed like struts and have a longitudinal section 14 running essentially parallel to the stent's longitudinal axis L and a U-shaped compensating section 15 aligned transversely thereto. It can be seen that the U- or V-shaped compensating sections 15 of the connectors 13 are each arranged in the area 16 between two axially spaced-apart ring segments 3-6. The middle connector 13' has two longitudinal sections 14' of equal length on both sides of its compensating section 15'.
Man erkennt ferner, dass die Verbinder 13 zwischen den Ringsegmenten 3-6 in Reihe axial hintereinander ausgerichtet sind. Hierbei erstrecken sich die Verbinder 13 jeweils vom Firstbereich 17 zweier Streben 7, 8 eines Ringsegments 3-6 aus. Zwischen zwei Streben 7, 8 des benachbarten Ringsegments 3 - 6 bis zum Übergangsabschnitt 11 dieser Streben 7, 8.It can also be seen that the connectors 13 between the ring segments 3-6 are aligned axially one behind the other in a row. The connectors 13 extend from the ridge area 17 of two struts 7, 8 of a ring segment 3-6. Between two struts 7, 8 of the adjacent ring segment 3 - 6 up to the transition section 11 of these struts 7, 8.
Jeder zweite stirnseitige Übergangsabschnitt 12, an den in Stentlängsachse L gesehen endseitigen Ringsegmenten 3 bzw. 6 ein gegenüber den benachbarten Übergangsabschnitten 11 axial vorstehendes, verbreitertes Kopfende 18 auf. Jedes Kopfende 18 besitzt einen konvex gerundeten Stirnabschnitt 19 und konkav gerundete Kehlabschnitte 20, 21 zwischen dem Kopfende 18 und den mit dem Kopfende 18 verbundenen Streben 9, 10. Die Kopfenden 18 sind pilzförmig konfiguriert, wobei die konvexen Stirnabschnitte 19 und die konkaven Kehlabschnitte 20, 21 durch gerundete Randabschnitte 22, 23 miteinander verbunden sind. Die Kehlabschnitte 20, 21 übergreifen auf die Weise die randseitigen Übergangsabschnitte 11 der benachbarten Streben 7, 8 im Ausgangszustand A mindestens bereichsweise und decken diese ab. Hierbei ist die Kontur der Kehlabschnitte 20, 21 auf die Kontur der Übergangsabschnitte 11 angepasst, so dass diese im Ausgangszustand A ineinander liegen.Every second front-side transition section 12 on the end ring segments 3 and 6, as seen in the stent longitudinal axis L, has a widened head end 18 that projects axially relative to the adjacent transition sections 11. Each head end 18 has a convexly rounded front section 19 and concavely rounded throat sections 20, 21 between the head end 18 and the struts 9, 10 connected to the head end 18. The head ends 18 are configured in a mushroom shape, with the convex front sections 19 and the concave throat sections 20, 21 being connected to one another by rounded edge sections 22, 23. In this way, the throat sections 20, 21 overlap the edge-side transition sections 11 of the adjacent struts 7, 8 in the initial state A at least in part and cover them. The contour of the throat sections 20, 21 is adapted to the contour of the transition sections 11 so that they lie inside each other in the initial state A.
Die gerundeten Kopfenden 18 gewährleisten eine behutsame Anlage des Stents 1 an der Gefäßwand beim Setzen. Auch beim Entfernen des Stents 1 werden die Gefäßwände weniger traumatisiert, weil die Kopfenden 18 eine schonende Explantation ermöglichen.The rounded head ends 18 ensure that the stent 1 is gently placed on the vessel wall when it is inserted. The vessel walls are also less traumatized when the stent 1 is removed because the head ends 18 enable gentle explantation.
An den in Stentlängsachse L gesehen endseitigen Ringsegmenten 3 bzw. 6 sind Umlenkelemente 24, 25 in Form von Ösen vorgesehen, die einstückig auf der innen liegenden Seite der Ringsegmente 3, 6 im Übergangsbereich 11' angegliedert sind. Über die Umlenkelemente 23, 24 wird ein, das Stützgerüst 2 außen umschließender Faden in das Innere des Stützgerüsts 2 umgelenkt, wo die Fadenenden durch einen Verbinder aus einem röntgensichtbaren Material fest miteinander verbunden sind. Zum Entfernen des Stents 1 können die Fadenenden am Verbinder ergriffen werden. Durch Ziehen wird der Faden eingeschnürt und hierbei das umschlungene Ringsegment 3 bzw. 6 radial zusammengezogen. Danach kann der Stent 1 aus der Körperröhre entfernt werden, wobei wie erwähnt, die gerundeten und verbreiterten Kopfenden 18 zu einer schonenden Entfernung des Stents 1 gewährleisten.On the end ring segments 3 and 6 as seen in the longitudinal axis L of the stent, deflection elements 24, 25 in the form of eyelets are provided, which are integrally attached to the inner side of the ring segments 3, 6 in the transition area 11'. A thread that surrounds the support frame 2 on the outside is deflected via the deflection elements 23, 24 into the interior of the support frame 2, where the thread ends are firmly connected to one another by a connector made of an X-ray-visible material. To remove the stent 1, the thread ends can be grasped at the connector. The thread is constricted by pulling and the looped ring segment 3 or 6 is thereby radially contracted. The stent 1 can then be removed from the body tube, whereby, as mentioned, the rounded and widened head ends 18 ensure that the stent 1 is removed gently.
1 -Stent1 -Stent
2 -Stützgerüst2 -Support frame
3 -Ringsegment3 -Ring segment
4 -Ringsegment4 -Ring segment
5 -Ringsegment5 -Ring segment
6 -Ringsegment6 -Ring segment
7 -Strebe7 -Strut
8 -Strebe8 -Strut
9 -Strebe
10-Strebe9 -Strut
10-Strut
11 -Übergangsabschnitt 11' -Übergangsabschnitt11 -Transition section 11' -Transition section
12 -Übergangsabschnitt 13-Verbinder12 -Transition section 13-Connector
13"-Verbinder13" connector
14 -Longitudinalabschnitt 14' -Longitudinalabshcnitt14 -Longitudinal section 14' -Longitudinal section
15 -Ausgleichsabschnitt 1 ö'-Ausgleichsabschnitt15 -Compensation section 1 ö'-Compensation section
16 -Bereich16 -Area
17 -Firstbereich 18-Kopfende17 - Ridge area 18-Head end
19-Stirnabschnitt19-Front section
20 -Kehlabschnitt20 -Throat section
21 -Kehlabschnitt21 -Throat section
22 -Randabschnitt22 -Edge section
23 -Randabschnitt23 -Edge section
24 -Umlenkelement24 - Deflection element
25 -Umlenkelement25 - Deflection element
L- Stentlängsachse A- Ausgangszustand S - StützzustandL- Stent longitudinal axis A- Initial state S - Support state
Claims (8)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20312113U DE20312113U1 (en) | 2003-08-04 | 2003-08-04 | stent |
| DE20318351U DE20318351U1 (en) | 2003-08-04 | 2003-11-27 | Medical stent has twin sets of loops in two rows alternating one with the other for insertion to blood vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20312113U DE20312113U1 (en) | 2003-08-04 | 2003-08-04 | stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20312113U1 true DE20312113U1 (en) | 2003-09-25 |
Family
ID=28685696
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20312113U Expired - Lifetime DE20312113U1 (en) | 2003-08-04 | 2003-08-04 | stent |
| DE20318351U Expired - Lifetime DE20318351U1 (en) | 2003-08-04 | 2003-11-27 | Medical stent has twin sets of loops in two rows alternating one with the other for insertion to blood vessel |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20318351U Expired - Lifetime DE20318351U1 (en) | 2003-08-04 | 2003-11-27 | Medical stent has twin sets of loops in two rows alternating one with the other for insertion to blood vessel |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE20312113U1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005089672A1 (en) * | 2004-03-16 | 2005-09-29 | Alveolus, Inc. | Stent |
| AU2005269663B2 (en) * | 2004-07-28 | 2010-09-23 | Cook Medical Technologies Llc | Stent with an end member having a lateral extension |
| EP1677706A4 (en) * | 2003-09-30 | 2010-12-29 | Merit Medical Systems Inc | Removable stent |
| US8262721B2 (en) | 2005-05-13 | 2012-09-11 | Merit Medical Systems, Inc. | Drainage stent and associated method |
-
2003
- 2003-08-04 DE DE20312113U patent/DE20312113U1/en not_active Expired - Lifetime
- 2003-11-27 DE DE20318351U patent/DE20318351U1/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1677706A4 (en) * | 2003-09-30 | 2010-12-29 | Merit Medical Systems Inc | Removable stent |
| WO2005089672A1 (en) * | 2004-03-16 | 2005-09-29 | Alveolus, Inc. | Stent |
| AU2004317383B2 (en) * | 2004-03-16 | 2009-05-14 | Alveolus, Inc. | Stent |
| US8652196B2 (en) | 2004-03-16 | 2014-02-18 | Merit Medical Systems, Inc. | Stent |
| AU2005269663B2 (en) * | 2004-07-28 | 2010-09-23 | Cook Medical Technologies Llc | Stent with an end member having a lateral extension |
| US8262721B2 (en) | 2005-05-13 | 2012-09-11 | Merit Medical Systems, Inc. | Drainage stent and associated method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20318351U1 (en) | 2004-02-12 |
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