SK283134B6 - Flexibilný roztiahnuteľný stent - Google Patents
Flexibilný roztiahnuteľný stent Download PDFInfo
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
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- 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
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
- A61F2002/91541—Adjacent bands are arranged out of phase
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
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- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
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Abstract
Stent (30) na implantovanie do tela je tvorený trubicou majúcou vzorovanú štruktúru, ktorá má prvé a druhé zákrutové vzory (11, 12), majúce osi prebiehajúce v prvom a druhom smere. Prvé zákrutové vzory (11) sú tvorené párnymi a nepárnymi zákrutovými vzormi (11e, 11o). Párne a nepárne zákrutové vzory (11e, 11o) sú vzájomne fázovo posunuté o 180° a nepárne zákrutové vzory (11e) sa nachádzajú vždy medzi dvoma nepárnymi zákrutovými vzormi (11o). Druhé zákrutové vzory (12) sú navzájom prepojené s prvými zákrutovými vzormi (11). Prvý a druhý smer môžu byť vzájomne ortogonálne. Druhé zákrutové vzory (12) môžu byť tvorené párnymi a nepárnymi zákrutovými vzormi (12e, 12o).ŕ
Description
Oblasť techniky
Vynález sa všeobecne týka stentov určených na implantáciu do živého tela.
Doterajší stav techniky
V tomto odbore je v súčasnosti známe množstvo rôznych stentov. Výraz „stent“, ako je v texte tejto prihlášky vynálezu použitý, označuje zariadenie vyrobené z materiálu zlučiteľného s telom, ktoré sa používa na rozšírenie krvných ciev alebo iných otvorov v tele a na udržanie konečnej veľkosti priechodov. Zvyčajne sa stent dopravuje do požadovanej oblasti v tele spolu s nafukovacím balónikom a hneď ako sa balónik nafúkne, stent sa roztiahne, čim rozšíri uvedený otvor. Na roztiahnutie sa používajú aj ďalšie mechanické zariadenia.
Niektoré príkladné druhy stentov opisujú napríklad tieto patentové dokumenty : patent US 5 019 090 (Pinchuk), US 5 161 547 (Tower), US 4 950 227 (Savin a kol.), US 5 314 472 (Fontaine), US 4 886 062 a US 4 969 458 (Miktor) a US 4 856 516 (Hillstead). Stenty vyrobené z rezaného zásobného materiálu sú opísané v patentoch US 4 733 665 (Palmaz), US 4 762 128 (Rosenbluth), US 5 102 417 (Palmaz a Schatz), US 5 195 984 (Schatz) a WO 91FR013820 (Meadox).
Stenty opísané v patente US 5 102 417 (Palmaz a Schatz) majú roztiahnuteľné rúrkovité vruby vzájomne spojené flexibilnou spojkou. Tieto vruby sú vybavené množinou drážok usporiadaných paralelne na pozdĺžnu os rúrky. Pružné spojky sú helikálne. Vzhľadom na to, že sú rúrkovité vruby relatívne tuhé, sú helikálne spojky potrebné na ohýbanie stentov pri ich preťahované cez zakrivenú krvnú cievu. Ak sa stenty podľa patentu US 5 102 417 rozťahujú, dochádza k radiálnemu roztiahnutiu vrubov a v dôsledku toho k pozdĺžnemu zvrašteniu. Ale súčasne dochádza na krútenie helikálnych spojok a tento krútivý pohyb je pravdepodobne pre krvnú cievu najškodlivejší.
Patent US 5 195 984 (Schatz) opisuje podobný stent, ale s jednou priamou spojkou, ktorá je paralelná s pozdĺžnou osou rúrkovitých vrubov, umiestnenou medzi rúrkovými vrúbkami. Tento priamy člen síce eliminuje krútivý pohyb, ale nie je príliš pevný.
Podstata vynálezu
Cieľom vynálezu je teda poskytnúť flexibilný stent, ktorý by sa pri rozťahovaní minimálne zmršťoval v pozdĺžnom smere.
Stent podľa vynálezu je teda tvorený rúrkou, ktorá má vzorovaný tvar, pričom tento stent je charakteristický tým, že vzorovaný tvar zahŕňa párne prvé zákrutové vzory majúce osi prebiehajúce v prvom smere; nepárne prvé zákrutové vzory tiež majúce osi prebiehajúce v prvom smere, pričom nepárne prvé zákrutové vzory sú o 180° fázovo posunuté od párnych prvých zákrutových vzorov a vyskytujú sa vždy medzi dvoma párnymi prvými zákrutovými vzormi; druhé zákrutové vzory majúce osi prebiehajúce v druhom smere odlišnom od prvého smeru, pričom druhé zákrutové vzory sú vzájomne prepojené s párnymi a nepárnymi prvými zákrutovými vzormi a tvoria tak všeobecne rovnomerne distribuovanú štruktúru.
Pri jednom uskutočnení má flexibilný roztiahnuteľný stent podľa vynálezu párne prvé zákrutové vzory a nepárne prvé zákrutové vzory prebiehajúce periodicky okolo osí v prvom smere a druhé zákrutové vzory prebiehajúce periodicky okolo osí v druhom smere.
Pri ďalšom uskutočnení majú druhé zákrutové vzory flexibilného roztiahnuteľného stentu podľa vynálezu dva ohyby na periódu a párne a nepárne prvé zákrutové vzory sú prispôsobené na prvú resp. druhú stranu každého ohybu.
Druhé zákrutové vzory flexibilného stentu podľa vynálezu sú pri výhodnom uskutočnení tvorené párnymi a nepárnymi druhými zákrutovými vzormi. Párne a nepárne prvé zákrutové vzory majú ohyby a párne a nepárne druhé zákrutové vzory sú spojené s párnymi a nepárnymi prvými zákrutovými vzormi tak, že ponechávajú medzi každým párom párnych a nepárnych druhých zákrutových vzorov jednu uzatvorenú slučku.
Podľa výhodného uskutočnenia vynálezu sú prvý a druhý smere ortogonálne.
Okrem toho v súlade s výhodným uskutočnením podľa vynálezu sú prvé a druhé zákrutové vzory vyrobené z plochého materiálu. Alternatívne môžu byť narezané z drôtov. Navyše môžu byť zapuzdrené alebo obalené ľubovoľným materiálom znášanlivým s telom.
Prehľad obrázkov na výkresoch
Vynález sa stane zrejmejším po preštudovaní nasledujúceho opisu s prihliadnutím k sprievodným výkresom, na ktorých:
obr. 1 znázorňuje vzorovaný stent konštruovaný v súlade s prvým výhodným uskutočnením vynálezu, obr. 2 znázorňuje vzor stentu z obrázka 1, obr. 3 znázorňuje stent z obrázka 1 v zahnutej polohe, obr.4 znázorňuje stent z obrázka 1 v roztiahnutom stave, obr. 5A a 5B znázorňujú zmeny, ku ktorým dôjde vo vzore stentu z obrázka 1 v dôsledku roztiahnutia, obr. 6 schematicky znázorňuje druhé uskutočnenie vzoru pre stent podľa vynálezu, obr. 7 znázorňuje tretie uskutočnenie vzoru pre stent podľa vynálezu a obr. 8 znázorňuje vzor z obrázka 7 v roztiahnutom stave.
Príklady uskutočnenia vynálezu
Pokiaľ ide o obrázky 1 až 4, ktoré znázorňujú prvé uskutočnenie stentu podľa vynálezu, obrázok 1 znázorňuje stent 30 v jeho neroztiahnutej forme, obr. 2 znázorňuje vzor tohto stentu 30, obr. 3 ho znázorňuje v čiastočne zahnutej polohe a obr. 4 ho znázorňuje v roztiahnutej forme.
Stent 30 podľa vynálezu je rúrka, ktorej strany sú tvorené množinou vždy dvoch ortogonálnych zákrutových vzorov, ktoré sú vzájomne vnútorne prepojené. Výraz „zákrutový vzor“, ako je tu uvedený, vykresľuje periodický vzor okolo stredovej línie a „ortogonálne zákrutové vzory“ sú vzory, ktorých stredové línie sú vzájomne ortogonálne.
Pokiaľ ide o stent na obrázkoch 1 až 4, sú tieto dva zákrutové vzory označené vzťahovými značkami 11, 12 a najlepšie zrejmé sú na obrázku 2. Prvý zákrutový vzor 11 je vertikálny sínusoíd majúci vertikálu stredovú líniu 9. Prvý zákrutový vzor 11 má dva ohyby 14 a 15 na periódu, pričom ohyb 14 je otvorený napravo, zatiaľ čo ohyb 16 je otvorený naľavo. Ohyby 14 a 16 majú spoločné členy 15 a 17, pričom člen 15 spája jeden ohyb 14 s nasledujúcim ohybom 16 a člen 17 spája jeden ohyb 16 s nasledujúcim ohybom 14.
Druhý zákrutový vzor 12 je horizontálny vzor majúci horizontálnu stredovú líniu 13. Druhý zákrutový vzor 12 má takisto ohyby 18 a 20, ale medzi ohybmi jednej periódy prechádza priama sekcia 22. Ohyby 18 sú otvorené smerom dole a ohyby 20 sú otvorené smerom hore. Vertikálny alebo prvý zákrutový vzor 11 je tvorený párnou a nepárnou verziou e a o), ktoré sú vzájomne fázovo posunuté o 180°. Takže každý naľavo otvorený ohyb 16 zákrutového vzoru llo je orientovaný k doprava otvorenému ohybu 14 zákrutového vzoru Ue a doprava otvorený ohyb 14 zákrutového vzoru llo je orientovaný k naľavo otvorenému ohybu 16 zákrutového vzoru Íle.
Horizontálny alebo druhý zákrutový vzor 12 má takisto párnu a nepárnu formu. Priama sekcia 22 horizontálneho párneho druhého zákrutového vzoru 12e pretína každý tretí spoločný člen 17 vertikálneho prvého párneho zákrutového vzoru Íle. Priame sekcie 22 horizontálneho druhého nepárneho vzoru 12o pretínajú každý tretí spoločný člen 15 vertikálneho druhého nepárneho zákrutového vzoru llo. Výsledkom je vytvorenie uzatvorenej slučky medzi druhými zákrutovými vzormi 12e a 12o a uzatvorenej slučky medzi druhými zákrutovými vzormi 12o a 12e.
Späť k obrázku 1, vzor z obrázka 2 je tvárnený do rúrky flexibilného roztiahnuteľného stentu 30, vyrobenej z ľahko deformovateľného materiálu, napríklad z kovu. Vzhľadom na dva zákrutové vzory je stent 30 z obrázka 1, ak sa prichytí cez katétrový balón, pružný a dá sa preto ľahko pretiahnuť cez zakrivené krvné cievy. Príklad spôsobu ohnutia stentu 30 z obrázka 1 je znázornený na obrázku 3.
Na tomto obrázku sa stent 30 začína ohýbať v mieste označenom vzťahovou značkou A v smere naznačenom šípkou 40. Hneď ako sa stent 30 začne ohýbať, sekcia I sa ocitne vnútri krivky, zatiaľ čo sekcia O sa ocitne vonku z krivky. Vnútorná strana I krivky sa skracuje oproti vonkajšej sekcii O krivky.
Počas zakrivenia ohyby 14 až 20 ležiace napravo od bodu A menia svoj tvar s cieľom kompenzovať rozdiel v dĺžke vnútornej a vonkajšej krivky, napríklad ohyby 18i a 20i v blízkosti vnútornej strany krivky sú vzájomne bližšie ako ohyby 18o a 20o na vonkajšej strane krivky. Ohyby 14i a 16i, ktoré sa nachádzajú v blízkosti vnútornej krivky I sa stláčajú, zatiaľ čo ohyby 14o a 16o v blízkosti vonkajšej sekcie O krivky sa rozťahujú.
Ako môže byť zrejmé z obrázkov, obidva, t. j. prvý a druhý zákrutový vzor 11 a 12, sú do ohybu zapojené. Aj keď to nie je ukázané, je zrejmé, že stent 30 z obrázkov 1 až 4 sa môže ohýbať v ľubovoľnom smere a dokonca vo viacerých smeroch naraz.
Obr. 4 znázorňuje stent 30 z obr. 1 v jeho roztiahnutej forme. Ak sa stent 30 roztiahne, roztiahnu sa obidva zákrutové vzory 11 a 12 (t. j. všetky ohyby 14 až 20 sa otvoria). Ako je možné sledovať, roztiahnutý stent 30 má dva typy ohraničených priestorov, veľký priestor 42 medzi zákrutovými vzormi 12o a 12e a malý priestor 44 medzi zákrutovými vzormi 12e a 12o. Takisto je zrejmé, že každý veľký priestor 42 má dva ohyby 14 na svojej ľavej strane a dva ohyby 16 na svojej pravej strane. Veľké priestory medzi vertikálnymi zákrutovými vzormi Íle a llo označené vzťahovou značkou 42a majú hore a dole ohyby 18, zatiaľ čo veľké priestory medzi vertikálnymi zákrutovými vzormi llo a Íle označené vzťahovou značku 42b majú hore a dole ohyby 20. Podobne je to tak pokiaľ ide o malé priestory 44a a 44b.
Je potrebné uviesť, že vďaka ortogonálnym prvým a druhým zákrutovým vzorom 11 a 12, nedochádza k podstatnejšiemu zmršťovaniu, v pozdĺžnom smere stentu 30 z obrázka 1 počas rozťahovania. Túto skutočnosť ilustrujú detailne obrázky 5A a 5B. Obrázok 5A znázorňuje pohyb jedného vertikálneho alebo prvého zákrutového vzoru 11 počas roztiahnutia a obrázok 5B ilustruje pohyb jedného horizontálneho alebo druhého zákrutového vzoru 12 počas roztiahnutia. Pôvodné vzory sú zobrazené pomocou plných čiar, zatiaľ čo roztiahnuté vzory sú zobrazené pomocou prerušovaných čiar.
Vertikálny alebo prvý zákrutový vzor 11 na obr. 5A sa rozpína tak, že rozširuje svoje ohyb 14 a 16. V dôsledku toho vertikálny alebo prvý zákrutový vzor 11 rastie vo vertikálnom smere o 2.hb na ohyb. Ale tento vzor sa takisto zmršťuje a to v horizontálnom smere o 2.d,. Podobne sa v dôsledku roztiahnutia ohybov 18 a 20 rozťahuje horizontálny alebo druhý zákrutový vzor 12 na obr. 5B. V dôsledku roztiahnutia uvedených ohybov sa druhý zákrutový vzor 12 rozťahuje v horizontálnom smere o 2.d2 na ohyb. Ale aj on sa zmršťuje a to vo vertikálnom smere o h2. Takže vertikálny rast vertikálneho alebo prvého zákrutového vzoru 11 kompenzuje aspoň čiastočne vertikálne zmrštenie horizontálneho alebo druhého zákrutového vzoru 12 a naopak. Je potrebné uviesť, že koncové časti ľubovoľného stentu 30 sú kompenzované len čiastočne a môžu sa teda trochu zmršťovať.
Dá sa predpokladať, že dva ortogonálne prvý a druhý zákrutový vzor 11 a 12 a ich vzájomná kompenzácia poskytnú flexibilitu neroztiahnutému stentu z obrázka 1. Jednako len, ak je stent roztiahnutý', poskytnú zmeny v jednotlivých ohyboch 14 a 16 výslednému stentu 30 tuhosť a umožnia mu tak udržať požadovaný vnútorný priemer krvnej cievy.
Stent 30 podľa vynálezu sa dá vyrobiť z plochého kovu, ktorý je vyleptaný do vzoru znázorneného na obrázku
2. Vyleptaný kov sa potom stočí do formy rúrky. Alternatívne sa dá vzor z obrázka 2 vyrobiť zo zvarovacicho alebo krúteného drôtu.
Je zrejmé, že stent 30 podľa vynálezu môže byť vyrobený z kovu a/alebo drôtu. Okrem toho môže byť pokrytý ochranným materiálom zapuzdrený, a/alebo pokrytý lekárskym materiálom, ktorý môže vyplniť veľké a malé priestory 42 a 44.
Je zrejmé, že do rozsahu predloženého vynálezu patria všetky stenty 30 vyrobené so vzorom tvoreným dvoma zákrutovými vzormi, ktoré zaujímajú vzájomne ortogonálnu alebo inú pozíciu. Ďalší príkladný vzor, takisto s ortogonálne usporiadanými zákrutovými vzormi, ktorý ukazuje obrázok 6 a schematicky obrázok 7 je zaoblenejšia verzia. Obrázok 8 ukazuje vzor z obrázka 7 v roztiahnutej forme. Vzor z obrázka 6 a 7 je podobný vzoru znázornenému na obrázku 2 s tou výnimkou, že má viac horizontálnych alebo druhých zákrutových vzorov 12, ktoré sa nerozlišujú na párne a nepárne, ale len jedného druhu.
Ako je zrejmé z obrázkov 6 a 7, tento vzor má dva typy vertikálnych alebo prvých vzorov Íle a llo, ktoré sú od seba fázovo posunuté o 180°. Horizontálne alebo druhé zákrutové vzory 12 sa spájajú so všetkými líniami 15 vertikálneho párneho prvého zákrutového vzoru Íle.
Obrázok 8 znázorňuje vzor z obrázka 7 v roztiahnutej forme. Pretože tento vzor nemá párne a nepárne horizontálne zákrutové vzory, nevznikajú v jeho štruktúre pri roztiahnutí ani veľké a malé priestory. Namiesto toho majú všetky vzniknuté ohraničené priestory rovnakú veľkosť.
Na záver je potrebné uviesť, že detailne opísané príkladné uskutočnenia vynálezu majú len ilustrovať podstatu vynálezu a v žiadnom prípade neobmedzujú jeho rozsah, ktorý je jednoznačne vymedzený priloženými patentovými nárokmi.
Claims (8)
- PATENTOVÉ NÁROKY1. Flexibilný roztiahnuteľný stent (30) tvorený rúrkou majúcou vzorovanú štruktúru, vyznačujúci sa tým, že táto vzorovaná štruktúra tvorí: a) párne prvé zákrutové vzory (1 le) majúce osi prebiehajúce v prvom smere; b) nepárne prvé zákrutové vzory (Ho) tiež majúce osi prebiehajúce v prvom smere, pričom nepárne prvé zákrutové vzory (1 lo) sú o 180° fázovo posunuté od párnych prvých zákrutových vzorov (Íle) a vyskytujú sa vždy medzi dvoma párnymi prvými zákrutovými vzormi (Íle), c) druhé zákrutové vzory (12) majúce os prebiehajúcu v druhom smere odlišnom od prvého smeru, pričom druhé zákrutové vzory (12) sú vzájomne prepojené s párnymi a nepárnymi prvými zákrutovými vzormi (Íle, 1 lo) a tvoria tak rovnomerne distribuovanú štruktúru.
- 2. Flexibilný roztiahnuteľný stent podľa nároku 1, vyznačujúci sa tým, že párne prvé zákrutové vzory (1 le) a nepárne prvé zákrutové vzory (Ho) prebiehajú periodicky okolo osí v prvom smere a druhé zákrutové vzory (12) prebiehajú periodicky okolo osí v druhom smere.
- 3. Flexibilný roztiahnuteľný stent podľa niektorého z nárokov 1 alebo 2, vyznačujúci sa tým, že druhé zákrutové vzory (12) majú dva ohyby (18, 20) na periódu a párne a nepárne prvé zákrutové vzory (Íle, 1 lo) sú pripojené na prvú, resp. druhú stranu každého ohybu (18, 20).
- 4. Flexibilný roztiahnuteľný stent podľa niektorého z predchádzajúcich nárokov, vyznačujúci sa tým, že druhé zákrutové vzory (12) sú tvorené párnymi a nepárnymi druhými zákrutovými vzormi (12e, 12o).
- 5. Flexibilný roztiahnuteľný stent podľa nároku 4, vyznačujúci sa tým, že párne a nepárne prvé zákrutové vzory (Íle, 11 o) majú ohyby (14, 16) a párne a nepárne druhé zákrutové vzory (12e, 12o) sú spojené s párnymi a nepárnymi prvými zákrutovými vzormi (Íle, 11 o) tak, že ponechávajú medzi každým párom párnych a nepárnych druhých zákrutových vzorov (12e, 12o)jednu uzatvorenú slučku tvorenú ohybom (14, 16).
- 6. Flexibilný roztiahnuteľný stent podľa niektorého z nárokov laž 5, vyznačujúci sa tým, že prvý a druhý smer sú ortogonálne.
- 7. Flexibilný roztiahnuteľný stent podľa niektorého z predchádzajúcich nárokov 1 až 6, vyznačujúci sa t ý m , že prvé a druhé zákrutové vzory (11, 12) sú vytvorené z drôtu.
- 8. Flexibilný roztiahnuteľný stent podľa niektorého z nárokov laž 6, vyznačujúci sa tým, že prvé a druhé zákrutové vzory (11, 12) sú vytvorené z plochého kovu.
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US08/457,354 US5733303A (en) | 1994-03-17 | 1995-05-31 | Flexible expandable stent |
PCT/US1995/008975 WO1996003092A1 (en) | 1994-07-28 | 1995-07-26 | A flexible expandable stent |
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1995
- 1995-05-31 US US08/457,354 patent/US5733303A/en not_active Expired - Lifetime
- 1995-07-26 ES ES98101294T patent/ES2169885T3/es not_active Expired - Lifetime
- 1995-07-26 BR BR9508353A patent/BR9508353A/pt not_active IP Right Cessation
- 1995-07-26 DE DE69534608T patent/DE69534608T2/de not_active Expired - Lifetime
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- 1995-07-26 PL PL95318270A patent/PL180527B1/pl not_active IP Right Cessation
- 1995-07-26 DE DE29521193U patent/DE29521193U1/de not_active Expired - Lifetime
- 1995-07-26 DE DE29522342U patent/DE29522342U1/de not_active Expired - Lifetime
- 1995-07-26 CH CH01436/01A patent/CH693441A5/de not_active IP Right Cessation
- 1995-07-26 CH CH01344/01A patent/CH693440A5/de not_active IP Right Cessation
- 1995-07-26 NZ NZ291543A patent/NZ291543A/xx unknown
- 1995-07-26 ES ES98101293T patent/ES2174341T3/es not_active Expired - Lifetime
- 1995-07-26 CZ CZ1997191A patent/CZ288740B6/cs not_active IP Right Cessation
- 1995-07-26 DK DK98101296T patent/DK0846452T3/da active
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- 1995-07-26 CA CA002365589A patent/CA2365589C/en not_active Expired - Lifetime
- 1995-07-26 UA UA97020873A patent/UA45355C2/uk unknown
- 1995-07-26 DE DE69533931T patent/DE69533931T3/de not_active Expired - Lifetime
- 1995-07-26 KR KR1019970700537A patent/KR970704387A/ko active IP Right Grant
- 1995-07-26 EP EP95929314A patent/EP0762856B1/en not_active Revoked
- 1995-07-26 CH CH00180/97A patent/CH691429A5/de not_active IP Right Cessation
- 1995-07-26 AT AT98101296T patent/ATE211898T1/de not_active IP Right Cessation
- 1995-07-26 EP EP98101294A patent/EP0846450B1/en not_active Revoked
- 1995-07-26 AT AT01122700T patent/ATE308945T1/de not_active IP Right Cessation
- 1995-07-26 AT AT95929314T patent/ATE170733T1/de not_active IP Right Cessation
- 1995-07-26 SK SK115-97A patent/SK283134B6/sk unknown
- 1995-07-26 EP EP98101296A patent/EP0846452B1/en not_active Revoked
- 1995-07-26 AU AU32706/95A patent/AU702468B2/en not_active Expired
- 1995-07-26 EP EP20040026188 patent/EP1602343A3/en not_active Withdrawn
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- 1995-07-26 EP EP98101295A patent/EP0846451A3/en not_active Withdrawn
- 1995-07-26 JP JP50581496A patent/JP3236623B2/ja not_active Expired - Lifetime
- 1995-07-26 ES ES95929314T patent/ES2123285T3/es not_active Expired - Lifetime
- 1995-07-26 DK DK98101293T patent/DK0846449T3/da active
- 1995-07-26 ES ES98101296T patent/ES2172041T3/es not_active Expired - Lifetime
- 1995-07-26 EP EP01122700A patent/EP1181901B1/en not_active Revoked
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- 1995-07-26 DE DE29522344U patent/DE29522344U1/de not_active Expired - Lifetime
- 1995-07-26 PT PT98101294T patent/PT846450E/pt unknown
- 1995-07-26 AT AT01123201T patent/ATE286689T1/de not_active IP Right Cessation
- 1995-07-26 DE DE69525072T patent/DE69525072T2/de not_active Revoked
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- 1995-07-26 EP EP01123201A patent/EP1181902B2/en not_active Expired - Lifetime
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- 1995-07-26 DK DK95929314T patent/DK0762856T3/da active
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1997
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- 1997-01-28 LU LU90031A patent/LU90031B1/de active
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1998
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1999
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2001
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2002
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2005
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