JP7679299B2 - 混合フレーム管腔内プロテーゼおよびその方法 - Google Patents
混合フレーム管腔内プロテーゼおよびその方法 Download PDFInfo
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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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- 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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- 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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- 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
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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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 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
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- A—HUMAN NECESSITIES
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- A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
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- A—HUMAN NECESSITIES
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- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0029—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in bending or flexure capacity
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Description
[0009]いくつかの実施形態では、管状グラフトは、主フレームの周りの組織の内方成長を防止し、それによって主フレームの可撓性を維持する。
[0011]いくつかの実施形態では、主フレームおよび末端フレームはどちらもニチノールである。
L=ML1+(M-1)S(等式1)
によって実現され、上式で、Mは環状部材の数であり、L1はダイヤモンド形セルの長尺寸法であり、Sは等式2
L2=πD1/N(等式3)
に従って判定されるダイヤモンド形セルの短尺寸法であり、上式で、D1は、管腔内プロテーゼの挿入状態または拡張状態にある主フレームの直径であり、Nは、各環状部材内のダイヤモンド形セルの数である。
[0042]健康な人の場合、胃、食道、または腸から流れる血液はまず、肝臓を通る。たとえば肝障害を患っている不健康な人の場合、血流を制限する障害物が存在する可能性があり、したがって血液が肝臓を容易に流れることができない。そのような状態は、門脈圧亢進症として知られている。門脈圧亢進症の一般的な原因には、アルコールの過剰摂取、肝臓から心臓へ流れる静脈中の血栓、肝臓内の過剰な鉄(たとえば、ヘモクロマトーシス)、B型肝炎、またはC型肝炎が含まれる。門脈圧亢進症が生じると、血流を制限する障害物により門脈内の圧力が上昇し、門脈の破裂および深刻な出血を引き起こす可能性がある。門脈圧亢進症の患者はまた、胃、食道、もしくは腸の静脈からの出血(たとえば、静脈瘤出血)、腹腔内の体液の貯留(たとえば、腹水)、または胸腔内の体液の貯留(たとえば、水胸)を有している可能性がある。少なくとも門脈圧亢進症を治療する管腔内プロテーゼおよびその方法が、本明細書に開示される。
L=ML1+(M-1)S(等式1)
によって実現され、上式で、Mは環状部材112の数であり、L1はダイヤモンド形セル114の長尺寸法であり、Sは等式2
L2=πD1/N(等式3)
に従って判定されるダイヤモンド形セル114の短尺寸法であり、上式で、D1は、管腔内プロテーゼ100の挿入状態または拡張状態にある主フレーム110の直径であり、Nは、各環状部材112内のダイヤモンド形セル114の数である。
Claims (19)
- 挿入状態および拡張状態を有する管腔内プロテーゼであって、
複数の環状部材を含む主フレームであり、各環状部材が複数のダイヤモンド形セルを含む、主フレームと、
複数の編込み支柱を含む末端フレームであり、前記主フレームの第1の端部および第2の端部にそれぞれ位置する第1の端部環状部材および第2の端部環状部材にそれぞれ結合された結合端を含む末端フレームと、
前記主フレームの上に位置する管状グラフトであり、前記第1の端部環状部材から前記第2の端部環状部材までの範囲のみで延びる管状グラフトとを備え、
前記第1の端部環状部材および前記第2の端部環状部材の前記ダイヤモンド形セルには、前記複数の編込み支柱が編込みにより結合されており、前記各編込み支柱は隣接する編込み支柱にダイヤモンド形セルを形成するように編込まれており、
前記編込み支柱の前記各ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線と、前記編込み支柱の前記各ダイヤモンド形セルが編込まれた前記第1の端部環状部材または前記第2の端部環状部材の前記ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線とが、一直線を形成している、管腔内プロテーゼ。 - 請求項1に記載の管腔内プロテーゼであって、
前記末端フレームが、前記結合端の反対の位置に非結合端部を含み、前記管腔内プロテーゼの前記拡張状態で、前記非結合端部の直径が前記主フレームの直径より大きい、管腔内プロテーゼ。 - 請求項2に記載の管腔内プロテーゼであって、
前記非結合端部が、前記編込み支柱を覆う奇数のタンタルキーを含み、放射線透過法による前記タンタルキーの識別を容易にするために、前記タンタルキーの幅が前記編込み支柱の幅より大きい、管腔内プロテーゼ。 - 請求項1~3のいずれか一項に記載の管腔内プロテーゼであって、
任意の2つの隣接する環状部材が、前記2つの隣接する環状部材の上の前記管状グラフトのみによって、ともに結合される、管腔内プロテーゼ。 - 請求項4に記載の管腔内プロテーゼであって、
前記任意の2つの隣接する環状部材の周りの前記管状グラフトにより、前記管腔内プロテーゼが前記挿入状態にあるか、それとも前記拡張状態にあるかにかかわらず、前記管腔内プロテーゼが同じ長さを維持することが可能になる、管腔内プロテーゼ。 - 請求項4または5に記載の管腔内プロテーゼであって、
前記管状グラフトが、前記任意の2つの隣接する環状部材の周りの前記主フレームに可撓性を与える、管腔内プロテーゼ。 - 請求項6に記載の管腔内プロテーゼであって、
前記管状グラフトが、前記主フレームの周りの組織の内方成長を防止し、それによって前記主フレームの前記可撓性を維持する、管腔内プロテーゼ。 - 請求項1~7のいずれか一項に記載の管腔内プロテーゼであって、
前記管状グラフトが、高密度ポリエチレン(「HDPE」)または延伸ポリテトラフルオロエチレン(「ePTFE」)である、管腔内プロテーゼ。 - 請求項1~8のいずれか一項に記載の管腔内プロテーゼであって、
前記主フレームおよび前記末端フレームがどちらもニチノールである、管腔内プロテーゼ。 - 管腔内プロテーゼであって、
複数の物理的に別個の環状部材を含む主フレームであり、主フレームと、
複数の編込み支柱を含む1対の末端フレームであり、各末端フレームが、前記主フレームの第1の端部または第2の端部にそれぞれ位置する第1の端部環状部材または第2の端部環状部材のうちの1つのみに結合された結合端を含む、1対の末端フレームと、
前記主フレームの上に位置する管状グラフトであり、前記第1の端部環状部材から前記第2の端部環状部材までの範囲のみで延びる管状グラフトとを備え、
前記第1の端部環状部材および前記第2の端部環状部材の前記ダイヤモンド形セルには、前記複数の編込み支柱が編込みにより結合されており、前記各編込み支柱は隣接する編込み支柱にダイヤモンド形セルを形成するように編込まれており、
前記編込み支柱の前記各ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線と、前記編込み支柱の前記各ダイヤモンド形セルが編込まれた前記第1の端部環状部材または前記第2の端部環状部材の前記ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線とが、一直線を形成している、管腔内プロテーゼ。 - 請求項10に記載の管腔内プロテーゼであって、
各末端フレームが、前記結合端の反対の位置に非結合端部を含み、前記非結合端部が、前記編込み支柱を覆う奇数のタンタルキーを含み、放射線透過法による前記タンタルキーの識別を容易にするために、前記タンタルキーの幅が前記編込み支柱の幅より大きい、管腔内プロテーゼ。 - 請求項10または11に記載の管腔内プロテーゼであって、
任意の2つの隣接する環状部材が、前記2つの隣接する環状部材の上の前記管状グラフトのみによって、ともに結合される、管腔内プロテーゼ。 - 請求項10~12のいずれか一項に記載の管腔内プロテーゼであって、
前記管状グラフトが、前記主フレームの周りの組織の内方成長を防止し、それによって前記環状部材の周りの前記主フレームの可撓性を維持するように構成された高密度ポリエチレン(「HDPE」)である、管腔内プロテーゼ。 - 請求項10~13のいずれか一項に記載の管腔内プロテーゼであって、
前記主フレームの長さLが、等式1
L=ML1+(M-1)S(等式1)
によって実現され、上式で、Mが環状部材の数であり、L1が前記ダイヤモンド形セルの長尺寸法であり、Sが等式2
に従って判定され、上式で、L2が、等式3
L2=πD1/N(等式3)
に従って判定される前記ダイヤモンド形セルの短尺寸法であり、上式で、D1が、前記管腔内プロテーゼの挿入状態または拡張状態にある前記主フレームの直径であり、Nが、各環状部材内のダイヤモンド形セルの数である、管腔内プロテーゼ。 - 管腔内プロテーゼのための方法であって、
複数の物理的に別個の環状部材を管状グラフトに固定して取り付けるステップによって、主フレームを形成するステップであり、各環状部材が複数のダイヤモンド形セルを含む、形成するステップと、
前記主フレームの第1の端部で複数の支柱を第1の端部環状部材に編み込んで、第1の末端フレームを形成し、前記主フレームの第2の端部で複数の支柱を第2の端部環状部材に編み込んで、第2の末端フレームを形成するステップによって、1対の末端フレームを形成するステップであって、前記管状グラフトが前記第1の端部環状部材から前記第2の端部環状部材までの範囲のみで延びており、前記第1の端部環状部材および前記第2の端部環状部材の前記ダイヤモンド形セルには、前記複数の編込み支柱が編込みにより結合されており、前記各編込み支柱は隣接する編込み支柱にダイヤモンド形セルを形成するように編込まれており、前記編込み支柱の前記各ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線と、前記編込み支柱の前記各ダイヤモンド形セルが編込まれた前記第1の端部環状部材または前記第2の端部環状部材の前記ダイヤモンド形セルの長尺寸法に沿った対向する2つの頂点を結ぶ線とが、一直線を形成している、ステップと、
各組の支柱の端部を、放射線透過法によるその識別に好適なタンタルキーによってともに固定するステップとを含む、方法。 - 請求項15に記載の方法であって、
前記主フレームを形成するとき、各環状部材を前の環状部材に対して長手方向に配置してから、前記管状グラフトに取り付け、それによって前記管状グラフトによって提供される前記環状部材間の前記管状グラフトの可撓性を保証するステップをさらに含む、方法。 - 請求項15または16に記載の方法であって、
前記環状部材を前記管状グラフトに固定して取り付けるステップが、前記環状部材を前記管状グラフトに挿入してから、前記管状グラフトに取り付けるステップ、または前記管状グラフトと別の管状グラフトとの間に前記環状部材を挟んでから、いずれかの管状グラフトに取り付けるステップを含む、方法。 - 請求項15~17いずれか一項に記載の方法であって、
各組の支柱の前記端部を前記タンタルキーによってともに固定するステップが、奇数のタンタルキーが得られるように、各組の支柱の前記端部をともに固定するステップを含む、方法。 - 請求項18に記載の方法であって、
前記奇数のタンタルキーを実現するために、各組の支柱のあらゆる残りの端部を前記タンタルキーなしでともに固定するステップをさらに含む、方法。
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| US20220117718A1 (en) | 2022-04-21 |
| WO2020155000A1 (en) | 2020-08-06 |
| JP2022522618A (ja) | 2022-04-20 |
| US12521225B2 (en) | 2026-01-13 |
| CN113382694A (zh) | 2021-09-10 |
| EP3917450A1 (en) | 2021-12-08 |
| EP3917450A4 (en) | 2022-10-26 |
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