JP6435421B2 - 可倒式アンカーを備えるステント - Google Patents
可倒式アンカーを備えるステント Download PDFInfo
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- JP6435421B2 JP6435421B2 JP2017543803A JP2017543803A JP6435421B2 JP 6435421 B2 JP6435421 B2 JP 6435421B2 JP 2017543803 A JP2017543803 A JP 2017543803A JP 2017543803 A JP2017543803 A JP 2017543803A JP 6435421 B2 JP6435421 B2 JP 6435421B2
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- stent
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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
- A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
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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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Gastroenterology & Hepatology (AREA)
- Pulmonology (AREA)
- Surgery (AREA)
- Epidemiology (AREA)
- Prostheses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Description
遠位端から近位端に向かって延び内表面と外表面とを有する管状支持構造体と、
管状支持構造体に対して配置され、フレーム部材とフレーム部材に固定された複数個の可倒式アンカーとを備え、
複数個の可倒式アンカーは、管状支持構造体の外側表面から径方向外方に延びているが径方向内方に圧縮されて搬送姿勢をとることができる。
上記の実施形態のいずれか1つに代替的に又は追加的に、複数個の可倒式アンカーは、ステントが埋め込まれた際に、第1方向にステントが移動することがないように、第1方向に向けられる。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、管状支持構造体の内側表面に近接して配置される。
上記実施形態のいずれか1つに代替的に又は追加的に、管状支持構造体は、自己展開性を備える。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、形状記憶材料からなる。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、可倒式アンカーシステムの近位端に回収部材を備え、フックに付加された近位方向の力は、後でステントを取り除く際に、可倒式アンカーの少なくとも一部が編組式支持構造体の一部に接触して径方向内方に偏倚されるように、可倒式アンカーシステムを編組式支持構造体に対して近位方向に移動させる。
ステントの遠位端から近位端に向かって延び内側表面と外側表面とを備える編組支持構造体と、
編組式支持構造体上に配置されるポリマー性の被覆と、
可倒式アンカーシステムと、を備え、可倒式アンカーシステムは、
可倒式アンカーシステムの端部に配置されるリングと
前記リングから編組支持構造体の全長に亘って延びる複数個のフレーム部材と、
複数個の各フレーム部材に固定されて前記編組式支持構造体の外表面から径方向外方に延びる姿勢に付勢された複数個の可倒式アンカーと、を備える。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、形状記憶素材からなる。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、可倒式アンカーシステムの近位端に回収部材を備え、フックに付加された近位方向の力は、食道ステントを取り除く際に、可倒式アンカーの少なくとも一部が編組式支持構造体の一部に接触して径方向内方に偏倚されるように、可倒式アンカーシステムを編組式支持構造体に対して近位方向に移動させる。
径方向に圧縮された姿勢で体腔内の所望の部位にステントを前進させることと、
径方向に展開された姿勢にステントを拡張することとから成り、
体腔壁に係合させる為に、可倒式アンカーシステムの複数個の可倒式アンカーを、編組式支持部材から径方向外方に延びる固定姿勢をとるように径方向に展開する方法。
上記実施形態のいずれか1つに代替的に又は追加的に、可倒式アンカーシステムは、回収の際に、径方向内方に可倒式アンカーを移動させるために、編組式支持構造体に対して近位方向に移動するように構成される。
ある用語の定義は、以下に与えられ、異なる定義が特許請求の範囲または本明細書において別段に与えられない限り、適用されるものとする。
様々な要素、特徴や仕様について、いくつかの好適な寸法、範囲や数値が開示されるが、本発明を参照した当業者であれば、これらの明示された内容から逸脱する所望の寸法、範囲や数値を導き出すであろう。
Claims (14)
- 遠位端から近位端に延びて内表面と外表面とを有する管状支持構造体と、
前記管状支持構造体に対して軸方向に相対移動可能に配置された可倒式アンカーシステムと、前記可倒式アンカーシステムがフレーム部材と前記フレーム部材に固定された複数個の可倒式アンカーを備えることと、からなるステントであって、
前記複数個の可倒式アンカーは、展開姿勢に付勢されて前記管状支持構造体の外表面から径方向外方に延びているが径方向内方に圧縮されて搬送姿勢をとることができるステント。 - 前記可倒式アンカーシステムは、展開姿勢に付勢されている、請求項1に記載のステント。
- 前記複数個の可倒式アンカーは、前記ステントが植込まれた際に、前記ステントが第1方向に移動することがないように、前記第1方向に指向されている、請求項1または2に記載のステント。
- 前記フレーム部材は、前記管状支持構造体に織り込まれている、請求項1乃至3のいずれか1項に記載のステント。
- 前記可倒式アンカーシステムは、前記管状支持構造体の近位端に回収部材を備え、前記回収部材に加えられた近位方向の力は、後でステントを取り除く際に、前記複数個の可倒式アンカーの少なくとも一部が前記管状支持構造体の一部に接触して径方向内方に偏倚されるように、前記可倒式アンカーシステムを前記管状支持構造体に対して近位方向に移動させる、請求項1または2に記載のステント。
- 前記可倒式アンカーシステムは、1つ以上の追加のフレーム部材をさらに備え、追加のフレーム部材は、それぞれ複数個の可倒式アンカーを備える、請求項1乃至5のいずれか一項に記載のステント。
- 前記フレーム部材は、それぞれ前記可倒式アンカーシステムの近位端に配置されたリングに連結されている、請求項6に記載のステント。
- 前記可倒式アンカーシステムは、前記管状支持構造体の内表面に近接して配置される、請求項1乃至7のいずれか一項に記載のステント。
- 前記可倒式アンカーシステムは、前記管状支持構造体の外表面に近接して配置される、請求項1乃至7のいずれか一項に記載のステント。
- 前記管状支持構造体は、自己展開性を備える、請求項1乃至9のいずれか一項に記載のステント。
- 前記管状支持構造体は、編組式支持構造体からなり、前記ステントは、前記編組式支持構造体上に配置されたポリマー性の被覆をさらに備え、
前記可倒式アンカーシステムは、前記可倒式アンカーシステムの端部に配置されたリングをさらに備え、前記フレーム部材は、前記リングから前記編組式支持構造体の全長に亘って延びる複数のフレーム部材をさらに備える、請求項1乃至10のいずれか一項に記載のステント。 - 前記可倒式アンカーシステムは、形状記憶材料からなる、請求項1乃至11のいずれか一項に記載のステント。
- 前記複数個の可倒式アンカーは、前記ステントが食道に植込まれた際に、前記ステントが第1方向に下方移動することがないように、前記第1方向に指向されている、請求項11または12に記載のステント。
- 前記可倒式アンカーシステムは、近位端に回収部材を備え、前記回収部材に加えられた近位方向の力は、後で前記ステントを取り除く際に、前記複数個の可倒式アンカーの少なくとも一部が前記編組式支持構造体の一部に接触して径方向内方に偏倚されるように、前記可倒式アンカーシステムを前記編組式支持構造体に対して近位方向に移動させる、請求項11乃至13のいずれか一項に記載のステント。
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