JP3236623B2 - 柔軟性拡張可能ステント - Google Patents

柔軟性拡張可能ステント

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Publication number
JP3236623B2
JP3236623B2 JP50581496A JP50581496A JP3236623B2 JP 3236623 B2 JP3236623 B2 JP 3236623B2 JP 50581496 A JP50581496 A JP 50581496A JP 50581496 A JP50581496 A JP 50581496A JP 3236623 B2 JP3236623 B2 JP 3236623B2
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JP
Japan
Prior art keywords
meander
stent
pattern
odd
dimensional
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
Application number
JP50581496A
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English (en)
Other versions
JPH10503676A (ja
Inventor
エム． イスラエル，ヘンリー
ピンチャシク，グレゴリー
Original Assignee
メディノール リミティド
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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 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
    • 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 sheet material 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
    • A61F2/856—Single tubular stent with a side portal passage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • 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
    • 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 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
    • 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
    • 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
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
    • 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
    • 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
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0054—V-shaped

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
  • Dowels (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Springs (AREA)
  • Cable Accessories (AREA)

Description

【発明の詳細な説明】 発明の分野 本発明は一般に生体に移植するためのステントに関す
る。
発明の背景 様々なステントが当業界において公知である。ここ
で、本願にとっては、「ステント」なる語は、血管、又
は身体におけるその他の開口部を広げ、そして得られる
管腔サイズを維持するために利用される身体適合性材料
より成る器具を意味する。一般に、ステントは膨張式バ
ルーンと一緒に身体の所望の位置にまで導入され、そし
てそのバルーンが膨張すると、ステントは拡張し、これ
によってその開口部を広げる。ステントを拡張させるそ
の他の機械的器具も利用される。
ワイヤーより成るステントの分野における典型的な特
許はPinchukの米国特許第5,019,090号、Towerの同5,16
1,547号、Savinらの同4,950,227号、Fontaineの同5,31
4,472号、Wiktorの同4,886,062号及び同4,969,458号、
並びにHillsteadの同4,856,516号である。切断ストック
金属より成るステントは以下に記載されている:Palmaz
の米国特許第4,733,665号、Rosenbluthの同4,762,128
号、Palmaz及びSchatzの同5,102,417号、Schatzの同5,1
95,984号、並びにMeadoxのWO 91 FRO13820号。
Palmaz及びSchatzの米国特許第5,102,417号に記載の
ステントは柔軟性コネクターと共に接続された拡張可能
管状移植片を有する。この移植片はその管の縦軸に平行
に配置された複数のスロットより成る。柔軟可能なコネ
クターはらせん式コネクターである。管状移植片は比較
的硬質であるため、ステントを湾曲した血管に通すとき
にそれが屈曲であるよう柔軟性コネクターが必要とされ
る。米国特許第5,102,417号のステントが拡張すると、
移植片は放射状に拡張し、その結果縦方向で収縮する。
しかしながら、同時に、らせん式コネクターはよじれ
る。このよじれ運動は血管にとっておそらく有害であ
る。Schatzの米国特許第5,195,984号には、類似ではあ
るが、管状移植片の間に、管状移植片の縦軸に対して平
行に一本の直線状のコネクターを有するステントが記載
されている。この直線状の部材はよじれ運動を排除す
る。しかしながら、それは非常に強力なコネクターでは
ない。
発明の概要 従い、本発明の目的は、柔軟性ステントであって、拡
張の際に縦方向において最少限にて収縮するステントを
提供することにある。
本発明のステントは、第一方向及び第二方向において
広がる軸を有する第一及び第二メアンダー模様をもつ模
様形態を有する管より成り、ここでこの第二メアンダー
模様は第一メアンダー模様とからみ合っている。その第
一及び第二方向は互いと直交し合ってよい。
本発明の一の態様に従うと、この第一メアンダー模様
は偶数次元及び奇数次元第一メアンダー模様とする。こ
の偶数次元及び奇数次元第一メアンダー模様は互いと18
0゜の位相角でずれており、そして奇数次元模様は２本
の偶数次元模様の間である。第二メアンダー模様も偶数
次元及び奇数次元模様より成ってよい。
更に、本発明の好適な態様に従うと、第二メアンダー
模様は周期毎に２本のループを有し、そしてこの偶数次
元及び奇数次元第一メアンダー模様は第二メアンダー模
様の各ループの第一及び第二側部のそれぞれに接続して
いる。
他方又は他に、この第二メアンダー模様は偶数次元及
び奇数次元第二メアンダー模様より成る。この態様にお
いては、この偶数次元及び奇数次元第二メアンダー模様
は偶数次元及び奇数次元第一メアンダー模様に接続さ
れ、偶数次元及び奇数次元第二メアンダー模様の各組の
間に１本の完全ループがある。
従って、本発明は更に ステントであって a.少なくとも一の奇数次元及び偶数次元の交互の区画：
ここでそれぞれは第一屈曲領域を有し、そしてここで前
記奇数次元の区画は、その上の第一屈曲領域が前記偶数
次元区画上の第一屈曲領域に隣接するように、前記偶数
次元区画と位相角ずれしている；並びに b.少なくとも１個の柔軟性コネクター：これは隣接し合
う偶数次元及び奇数次元区画の第一屈曲領域を接続せし
める複数の柔軟性リンクを含んで成る； を含んで成り、ここで各柔軟性リンクは少なくとも一の
第二屈曲領域により接続された少なくとも２つの部分を
有し、そして前記第一及び第二屈曲領域が第一角及び第
二角であって、各々の二等分線が互いと交差する角を規
定している、ステントを提供する。
また、本発明は 隣接し合う連続セルのメッシュを含んで成るステント
であって、各セルが： 閉じられたセルの中で互いと接続した偶数の数の一定
の長さの交互となった第一及び第二ループを含んで成
り、ここで各ループはその間に屈曲領域をもつ少なくと
も２つの部分を有し、前記第一及び第二ループが第一角
及び第二角であって、各々の二等分線が互いと交差する
角を規定している、ステントを提供する。
更に、本発明の好適な態様に従うと、この第一及び第
二メアンダー模様は平らな金属より成る。他方、それら
はワイヤーから切り取ってもよい。更に、それらに任意
に身体適合性材料を埋込む又はカバーを施してもよい。
図面の簡単な説明 本発明の図面と共に以下の詳細な説明から一層完全に
理解及び認定できるであろう。
図１は本発明の第一の好適な態様に従って構築し、そ
して機能する模様付きステントの図示である。
図２は図１のステントの模様の図示である。
図３は屈曲位置における図１のステントの図示であ
る。
図４は拡張状態の図１のステントの図示である。
図5A及び5Bは拡張による図１のステントの模様の変化
の図示である。
図６は第二のステント模様の態様の図示である。
図７は第三のステント模様の態様の図示である。
図８は拡張状態の図７の模様の図示である。
好適な態様の詳細な説明 図１〜４に関し、本発明の原理に従って構築し、そし
て機能する第一のステントの態様を示す。図１はその拡
張していない形状を示し、図２はステントの模様を示
し、図３はその部分的に屈曲した位置を示し、そして図
４はその拡張状態を示す。
本発明のステントは管であり、その側部には複数の２
種類の直交メアンダー模様それぞれが設けられ、その模
様は互いとからみ合っている。「メアンダー模様」なる
語は本明細書では中心線分を中心とした周期模様を説明
するために用い、そして「直交メアンダー模様」はその
中心線分が互いと直交する模様同志をいう。
図１〜４のステントにおいて、２種類のメアンダー模
様を11及び12と表示し、そしてそれらは図２で最もよく
わかる。メアンダー模様11は鉛直中心線分９を有する鉛
直正弦波である。メアンダー模様11は一周期毎に２本の
ループ14及び16を有し、ここでループ14は右に向って広
がり、一方ループ16は左に向って広がる。ループ14と16
は共有部材15と17を共有し、ここで部材15は一のループ
14からその次のループ16へと接続され、そして部材15は
一のループ16からその次のループ14へと接続されてい
る。
メアンダー模様12は水平中心線分13を有する水平模様
である。メアンダー模様12も18及び20と表示したループ
を有するが、周期のループ間には22と表示した長い直線
区画がある。ループ18は下方向に広がり、そしてループ
20は上方向に広がる。鉛直メアンダー模様11は偶数次元
及び奇数次元（ｏとｅ）のバージョンで施されており、
それらは互いと180゜の位相角でずれている。即ち、メ
アンダー11oの各左開放ループ16はメアンダー11eの右開
放ループ14と向い合い、そしてメアンダー11oの右開放
ループはメアンダー11eの左開放ループと向い合ってい
る。
水平メアンダー模様には奇数次元及び偶数次元形態で
施されていてもよい。水平メアンダー模様12eの直線区
画22は鉛直メアンダー模様11eの３個毎の共有部材17と
交差している。水平メアンダー模様12oの直線区画22
は、交差している共有部材17と２個後方の共有部材15で
始まって、鉛直メアンダー模様11eの３個毎の共有部材1
5と交差している。その結果、メアンダー模様12eと12o
との間に完全ループ14が、そしてメアンダー模様12oと1
2eとの間に完全ループ16ができる。
図１にもどると、図２の模様は易変形性材料、例えば
金属の管30に形成されている。２種類のメアンダー模様
に基づき、図１のステントは、カテーテルバルーンの上
にかぶせたとき、それは柔軟性であり、それ故屈曲した
血管の中を容易に通り抜けることができる。図１のステ
ントが屈曲している例を図３に示す。
図３において、ステントは矢印40で表示した方向で表
示地点Ａで屈曲し始めている。ステントが屈曲し始める
と、Ｉと表示した区画は曲線の内側となり、そしてＯと
表示した区画は曲線の外側となる。曲線Ｉの内側は向い
側の曲線Ｏの外側より短くなる。
屈曲の際、地点Ａの右側にあるループ14〜20は内側と
外側の曲線との間の長さの差を補うために形状変化す
る。例えば、曲線の内側付近のループ18i及び20iは、拡
張する曲線の外側上のループ18o及び20oよりも互いと接
近し合う。内側Ｉの近くのループ14i及び16iは圧縮さ
れ、一方曲線の外側Ｏの近くのループ14o及び16oは拡張
する。
わかる通り、メアンダー模様11及び12は双方とも屈曲
に関与する。示してはいないが、図１〜４のステントは
任意の方向において、且つ同時に複数の方向において屈
曲できることが理解されるであろう。
図４は拡張状態の図１のステントを図示する。ステン
トが拡張すると、メアンダー模様11及び12は双方とも拡
張する（即ち、ループ14〜20は全て広がる）。わかる通
り、拡張したステントは２タイプの閉じられた空間、即
ちメアンダー模様12oと12eとの間の大空間42及びメアン
ダー模様12eと12oとの間の小空間44を有する。わかる通
り、各大空間42はその左側に２本のループ14及びその右
側に２本のループ16を有する。鉛直メアンダー模様11e
と11oとの間の大空間（42aと表示）はその頂部及び底部
にループ18を有し、一方鉛直メアンダー模様11oと11eと
の間の大空間（42bと表示）はその頂部及び底部にルー
プ20を有する。小空間44a及び44bも同様である。
直交メアンダー模様11及び12に基づき、図１のステン
トは拡張の際に有意に収縮しないことに注目すべきであ
る。これは図5A及び5Bに詳しく示してある。このことに
ついて説明する。図5Aは拡張の際の一本の鉛直メアンダ
ー模様11の動きを示し、そして図5Bは拡張の際の一本の
水平メアンダー模様12の動きを示す。もとの模様を実線
で示し、そして拡張した模様を破線で示す。
図5Aの鉛直メアンダー模様11はそのループ14及び16が
広がることによって拡張する。その結果、鉛直メアンダ
ー模様11はループ当り２＊h1の値で鉛直方向に増大す
る。しかしながら、それは２＊d1の値で水平方向で収縮
もする。同様に、図5Bの水平メアンダー模様12はそのル
ープ18及び20が広がることにより拡張する。その結果、
水平メアンダー模様12はループ当り２＊d2の値で水平方
向で成長する。しかしながら、それはh2の値で鉛直方向
で収縮もする。即ち、鉛直メアンダー模様11の鉛直方向
増大は、少なくともある程度、水平メアンダー模様12の
鉛直方向収縮を補い、そしてその逆も真なりである。任
意のステントの先端部分は部分的にしか補われず、それ
故若干収縮しうる。
２種類の直交メアンダー模様11及び12並びにそれらが
互いに付与し合う補完は図１の未拡張ステントに柔軟性
を付与することが理解されるであろう。しかしながら、
ステントが拡張すると、ループ14及び16のそれぞれの変
化は得られるステントに硬質性を付与し、それ故ステン
トが血管を所望の内径に維持させることを可能にする。
本発明のステントは平らな金属から、それを図２の模
様へとエッチングすることで製造できる。エッチングを
施した材料を屈曲させて管30にする。他方、図２の模様
は溶接又はよじったワイヤーから製造できる。
本発明のステントは金属及び／又はワイヤーから作れ
うることが明らかであろう。更に、それに保護材料をプ
レーティングする、医薬品を浸す、及び／又は空間42及
び44を埋めることのできる材料でコーティングを施すこ
とができる。
本発明は、２種類のメアンダー模様、直交型又はその
他より成る模様をもって製造される全てのステントを包
括するものと理解されるであろう。直交メアンダー模様
を有するその他の典型的な模様をここで提供し、ここで
図６は模式バージョンであり、そして図７は一層丸みを
帯びたバージョンである。図８は拡張状態の図７の模様
を示す。図６及び７の模様は図２に示すものと似ている
が、ただしそれはより水平なメアンダー模様を有し、そ
してそれらは図２に示しているような偶数次元及び奇数
次元のものではなく、一種類のものである。
図６及び７の双方でわかる通り、２タイプの鉛直メア
ンダー模様11e及び11oは互いに対して180゜の位相角で
ずれている。水平メアンダー模様12は鉛直メアンダー模
様11eの全線分15に接続している。図８は拡張状態の図
７の模様を示す。図８の拡張状態では偶数次元及び奇数
次元水平メアンダー模様がないため、大空間及び小空間
はない。その代わり、空間は全て同じサイズである。
本発明は記載の態様に限定されないことを当業者は理
解するであろう。本発明は添付の請求の範囲によっての
み規定される。
フロントページの続き (56)参考文献 米国特許5102417（ＵＳ，Ａ) 国際公開95／31945（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) A61M 29/02

Claims (12)

    (57)【特許請求の範囲】
  1. 【請求項１】模様形状を有する管より成るステントであ
    って、ここでこの模様形状は： a.第一方向に広がる軸を有する偶数次元第一メアンダー
    模様； b.これも第一方向に広がる軸を有する奇数次元第一メア
    ンダー模様：ここで前記奇数次元第一メアンダー模様は
    前記偶数次元第一メアンダー模様と180゜の位相角でず
    れており、そして２本毎の偶数次元メアンダー模様の間
    にある； c.前記第一方向とは異なる第二方向に広がる軸を有する
    第二メアンダー模様：ここで前記第二メアンダー模様は
    前記偶数次元及び奇数次元第一メアンダー模様とからみ
    合って概して均一な分布構造を形成している； を含んで成る、ステント。
  2. 【請求項２】前記偶数次元第一メアンダー模様及び前記
    奇数次元第一メアンダー模様が前記第一方向に広がる軸
    を中心に周期的となっており、そして前記第二メアンダ
    ー模様が前記第二方向に広がる軸を中心に周期的となっ
    ている、請求項１記載のステント。
  3. 【請求項３】前記第二メアンダー模様が周期毎に２本の
    ループを有し、そして前記偶数次元及び奇数次元第一メ
    アンダー模様が各ループの第一及び第二側部それぞれに
    接続している、請求項１又は２記載のステント。
  4. 【請求項４】前記第二メアンダー模様が偶数次元及び奇
    数次元メアンダー模様より成る、先の請求項のいずれか
    １項記載のステント。
  5. 【請求項５】前記偶数次元及び奇数次元第一メアンダー
    模様がループを有し、そして前記偶数次元及び奇数次元
    第二メアンダー模様が前記偶数次元及び奇数次元第一メ
    アンダー模様に接続され、各組の偶数次元及び奇数次元
    第二メアンダー模様の間に１本の完全ループができてい
    る、請求項４記載のステント。
  6. 【請求項６】模様形状を有する管より成るステントであ
    って、ここでこの模様形状が： a.第一方向に広がる軸を有する第一メアンダー模様； b.前記第一方向とは異なる第二方向に広がる軸を有する
    第二メアンダー模様：ここで前記第二メアンダー模様は
    前記偶数次元及び奇数次元第一メアンダー模様とからみ
    合って概して均一な分布構造を形成している； を含んで成る、ステント。
  7. 【請求項７】前記第一メアンダー模様が前記第一方向に
    広がる軸を中心に周期的であり、そして前記第二メアン
    ダー模様が前記第二方向に広がる軸を中心に周期的であ
    る、請求項６記載のステント。
  8. 【請求項８】前記第一及び第二方向が直交している、請
    求項１〜７のいずれか１項記載のステント。
  9. 【請求項９】前記第一及び第二方向が直交していない、
    請求項１〜７のいずれか１項記載のステント。
  10. 【請求項１０】前記第一及び第二メアンダー模様がワイ
    ヤーより成る、請求項１〜９のいずれか１項記載のステ
    ント。
  11. 【請求項１１】前記第一及び第二メアンダー模様が平ら
    な金属より切断されたものである、請求項１〜９のいず
    れか１項記載のステント。
  12. 【請求項１２】前記ステントが、保護材料のプレーティ
    ング、医薬品の含浸及び材料でのカバーのうちのいずれ
    かにより仕上げられたものである、請求項１〜11のいず
    れか１項記載のステント。
JP50581496A 1994-07-28 1995-07-26 柔軟性拡張可能ステント Expired - Lifetime JP3236623B2 (ja)

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US08/282,181 1994-07-28
US08/457,354 1995-05-31
US282,181 1995-05-31
US457,354 1995-05-31
US08/457,354 US5733303A (en) 1994-03-17 1995-05-31 Flexible expandable stent

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AU3270695A (en) 1996-02-22
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EP1181902B2 (en) 2009-03-25
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EP1181902A2 (en) 2002-02-27
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EP1602343A2 (en) 2005-12-07
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ATE212210T1 (de) 2002-02-15
LU90031B1 (de) 1997-04-16
DE69524638T2 (de) 2002-05-08
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CA2424525C (en) 2006-01-31
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FI970316A (fi) 1997-03-07
ATE211898T1 (de) 2002-02-15
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EP1181901B1 (en) 2005-11-09
BR9508353A (pt) 1997-11-04
ATE170733T1 (de) 1998-09-15
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SI9520079A (en) 1997-12-31
AU702468B2 (en) 1999-02-25
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