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JPH11319112A - 柔軟性拡張可能ステント - Google Patents

柔軟性拡張可能ステント

Info

Publication number
JPH11319112A
JPH11319112A JP11081198A JP8119899A JPH11319112A JP H11319112 A JPH11319112 A JP H11319112A JP 11081198 A JP11081198 A JP 11081198A JP 8119899 A JP8119899 A JP 8119899A JP H11319112 A JPH11319112 A JP H11319112A
Authority
JP
Japan
Prior art keywords
pattern
stent
loops
meander
meandering
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
JP11081198A
Other languages
English (en)
Inventor
Henry M Israel
エム． イスラエル、ヘンリー
Gregory Pinchasik
ピンチャシク、グレゴリー
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.)
Medinol Ltd
Original Assignee
Medinol Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26961291&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH11319112(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Medinol Ltd filed Critical Medinol Ltd
Publication of JPH11319112A publication Critical patent/JPH11319112A/ja
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • 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
    • A61F2/856—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 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
    • 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 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
    • A61F2002/91558—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)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Springs (AREA)
  • Cable Accessories (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

(57)【要約】 （修正有） 【課題】 身体に移植するためのステントの提供。 【解決手段】ステント３０は、第一及び第二方向に広が
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
状を有する管より成る。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してよい。偶数次元
及び奇数次元第一メアンダー模様は互いと１８０゜の位
相角でずれており、奇数次元模様は２本毎の偶数次元模
様の間にある。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。第一及び第二方向は互いと直交
していてよいし、第二メアンダー模様は偶数次元及び奇
数次元模様より成ってもよい。

Description

【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明はー般に生体に移植す
るためのステントに関する。
【０００２】
【従来の技術】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ー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。
【０００３】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５，０１
９，０９０号、Ｔｏｗｅｒの同５，１６１，５４７号、
Ｓａｖｉｎらの同４，９５０，２２７号、Ｆｏｎｔａｉ
ｎｅの同５，３１４，４７２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５，１９５，９８４号、並びにＭ
ｅａｄｏｘのＷＯ ９１ ＦＲ ０１３８２０号。
【０００４】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きるよ
う柔軟性コネクターが必要とされる。米国特許第５，１
０２，４１７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。Ｓｃｈａｔ
ｚ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
行にー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。
【０００５】
【発明が解決しようとする課題】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。
【０００６】
【課題を解決するための手段】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。
【０００７】本発明のーの態様に従うと、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１８０゜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にある。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。
【０００８】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。
【０００９】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。
【００１０】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
れらに任意の身体適合性材料を埋込む又はカバーを施し
てもよい。
【００１１】
【発明の実施の形態】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。
【００１２】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。
【００１３】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
はー周期毎に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とへ接続されている。
【００１４】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。
【００１５】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１
２ｅ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１５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１２ｅとの間
に完全ループ１６ができる。
【００１６】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。
【００１７】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。
【００１８】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１８
ｉ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。
【００１９】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。
【００２０】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１
２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１
１ｅ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。
【００２１】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。
【００２２】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＊ｄ
1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１
２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。
【００２３】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。
【００２４】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。
【００２５】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。
【００２６】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。
【００２７】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１
２は鉛直メアンダー模様１ｌｅ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。
【００２８】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。
【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ー層完全に理
解及び認定できるであろう。
【図１】 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】 図１のステントの模様の図示である。
【図３】 屈曲位置における図１のステントの図示であ
る。
【図４】 拡張状態の図１のステントの図示である。
【図５】 Ａ及びＢ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】 第二のステント模様の態様の図示である。
【図７】 第三のステント模様の態様の図示である。
【図８】 拡張状態の図７の模様の図示である。

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】 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ステント。
JP11081198A 1994-07-28 1999-03-25 柔軟性拡張可能ステント Pending JPH11319112A (ja)

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US28218194A 1994-07-28 1994-07-28
US08/282,181 1994-07-28
US08/457,354 US5733303A (en) 1994-03-17 1995-05-31 Flexible expandable stent
US08/457,354 1995-05-31

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JP11334452A Pending JP2000176022A (ja) 1994-07-28 1999-11-25 柔軟性拡張可能ステント
JP2001203829A Pending JP2002078808A (ja) 1994-07-28 2001-07-04 柔軟性拡張可能ステント
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JP2005115052A Expired - Lifetime JP4391963B2 (ja) 1994-07-28 2005-04-12 柔軟性拡張可能ステント

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EP0846452B1 (en) 2002-01-16
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DK8097A (da) 1997-02-19
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