JP2017535372A - バルーンにより膨らませることができる内部人工器官 - Google Patents
バルーンにより膨らませることができる内部人工器官 Download PDFInfo
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Abstract
Description
Claims (28)
- ステントグラフトと、カテーテル組立体とを含む医療機器であって、
前記ステントグラフトは、第1の自由端、第2の自由端、及び前記第1の自由端と前記第2の自由端との間の中間部を有し、未展開直径及び前記第1の自由端と前記第2の自由端の間の未展開長手方向長さを有する未展開状態並びに展開直径及び前記第1の自由端と前記第2の自由端の間の展開長手方向長さを有する展開状態を有すると共に、前記ステントグラフトは、ステント部とグラフト部とを含み、
前記ステントグラフトは、前記未展開状態で前記カテーテル組立体に組み立てられていると共に、前記カテーテル組立体は、バルーンと、前記バルーンを同心円状に囲むカバーとを含み、
前記ステントグラフトの前記中間部は、前記ステントグラフトの前記中間部で前記バルーンの膨張に抵抗を付与し、前記カバーも前記バルーンの膨張に抵抗を付与して、前記ステントグラフトの前記中間部における前記バルーンの膨張率と前記ステントグラフトの前記自由端における前記バルーンの膨張率の差を低減し、その結果、前記バルーンが前記ステントグラフトを前記未展開状態から前記展開状態に膨らませる際に、前記ステントグラフトの長手方向の圧縮を低減する、医療機器。 - 前記ステントグラフトの前記展開長さは、前記ステントグラフトの前記未展開長さの少なくとも85%である、請求項1に記載の医療機器。
- 前記バルーンが前記ステントグラフトを前記未展開状態から前記展開状態に膨らませる際に前記ステントグラフトの長手方向の圧縮を低減するように、前記カバーは前記バルーンの対応する肩部の膨張に抵抗するように構成される補強部を含む、請求項1に記載の医療機器。
- 前記ステントグラフトの前記ステント部は、前記ステントグラフトの前記グラフト部によって接続される別個の部品である複数の環状ステント要素を含む、請求項1に記載の医療機器。
- 前記グラフト部は、前記ステントグラフトが前記未展開状態であるときに前記ステントグラフトの長手方向長さを収容するように構成される、請求項1に記載の医療機器。
- 前記ステントグラフトの前記グラフト部はePTFEで形成される、請求項1に記載の医療機器。
- ステントグラフトと、カテーテル組立体とを含む医療機器であって、
前記ステントグラフトは、第1の自由端、第2の自由端、及び前記第1の自由端と前記第2の自由端との間の中間部を有し、前記第1の自由端と前記第2の自由端との間の未展開長手方向長さを有する未展開状態及び前記第1の自由端と前記第2の自由端との間の展開長手方向長さを有する展開状態を有すると共に、前記ステントグラフトは、ステント部とグラフト部とを含み、
前記ステントグラフトは、前記未展開状態で前記カテーテル組立体に組み立てられていると共に、前記カテーテル組立体は、バルーンと、前記バルーンを同心円状に囲むカバーとを含み、
前記ステントグラフトの前記展開長さが前記ステントグラフトの前記未展開長さの少なくとも85%になるように、前記ステントグラフトの前記中間部が前記ステントグラフトの前記中間部における前記バルーンの膨張に抵抗を付与し、前記カバーも前記バルーンの膨張に抵抗を付与する、医療機器。 - 前記ステントグラフトの前記グラフト部はePTFEで形成される、請求項7に記載の医療機器。
- ステントグラフトと、カテーテル組立体とを含む医療機器であって、
前記ステントグラフトは、内側ePTFEグラフト要素、外側ePTFEグラフト要素、及び、前記内側ePTFEグラフト要素と前記外側ePTFEグラフト要素との間に位置する複数の環状ステント要素を含むと共に、前記ステントグラフトは、未展開直径を有する未展開状態と前記未展開直径よりも大きな展開直径を有する展開状態を有し、
前記カテーテル組立体は、カバーにより同心円状に囲まれるバルーンを含み、前記カバーは、前記バルーンが前記ステントグラフトを前記未展開状態から前記展開状態に膨らませる際に前記ステントグラフトの長手方向の圧縮を低減するように、前記バルーンの対応する肩部の膨張に抵抗するように構成される補強部を含む、医療機器。 - 前記カバーの前記補強部は、前記バルーンを膨らませる際に前記バルーンの中央部に対する前記バルーンの前記肩部の半径方向の膨張量を減少させる前記バルーンの膨張輪郭を維持する、請求項9に記載の医療機器。
- 前記複数の環状ステント要素は、前記ステントグラフトが前記未展開状態にあるときに長手方向の長さを収容するように構成される、請求項9に記載の医療機器。
- 前記ステントグラフトは、前記未展開状態で未展開長さを有し、前記展開状態で展開長さを有し、前記展開長さは前記未展開長さの85%〜99%の間である、請求項9に記載の医療機器。
- 前記複数の環状ステント要素は相互接続されたワイヤフレームを含む、請求項9に記載の医療機器。
- 前記複数の環状ステント要素は、一列の相互接続された菱形のワイヤフレームを含む、請求項9に記載の医療機器。
- 第1の環状ステント要素の頂点と第2の環状ステント要素の隣接する頂点は長手方向軸に沿って位相がずれている、請求項9に記載の医療機器。
- ステントグラフトと、カテーテル組立体とを含む医療機器であって、
前記ステントグラフトは、未展開直径及び未展開長さを有する未展開状態、並びに展開直径及び展開長さを有する展開状態を有すると共に、前記ステントグラフトは、内側グラフト要素、外側グラフト要素、及び、前記内側グラフト要素と前記外側グラフト要素との間に位置し、かつそれらに取り付けられた複数の環状ステント要素を含み、
前記カテーテル組立体は、円錐状端部を有するバルーンと、前記バルーンを同心円状に囲むカバーとを含み、前記カバーは、前記バルーンの前記円錐状端部を同心円状に囲む補強部、及び中央部を有し、前記カバーの前記補強部は、前記ステントグラフトの長手方向の圧縮を低減する膨張輪郭を維持するために、前記カバーの前記中央部の密度よりも高い密度を有する、医療機器。 - 前記ステントグラフトが前記未展開状態にあるときの前記複数の環状ステント要素のうちの少なくとも一部の間隔は、前記展開状態にある前記ステントグラフトによって回復される長手方向の長さを収容する、請求項16に記載の医療機器。
- 前記展開長さは、前記未展開長さに比べて1%未満の短縮率を示す、請求項16に記載の医療機器。
- 前記カバーの前記補強部は、前記中央部の半径方向強度よりも大きな半径方向強度を有する、請求項16に記載の医療機器。
- 前記カバーの前記補強部は、前記バルーンが膨張する間、前記バルーンの前記円錐状端部の膨張を制限する、請求項16に記載の医療機器。
- 前記カバーの前記補強部は、前記カバーの軸方向に圧縮された部分を含む、請求項16に記載の医療機器。
- 前記カバーの前記補強部は、前記カバーのひだ付き部分を含む、請求項16に記載の医療機器。
- 前記カバーの前記ひだ付き部分のひだは、前記バルーンのひだ付き部分のひだと対応する、請求項22に記載の医療機器。
- ステントグラフトを作製する方法であって、
内側グラフト要素と外側グラフト要素との間に複数の環状ステント要素を長手方向軸に沿って配置し、
前記複数の環状ステント要素、前記内側グラフト要素、及び前記外側グラフト要素を圧縮形態に圧縮し、
前記複数の環状ステント要素のうちの少なくとも2つを互いに近づけるように動かして長手方向長さを収容し、前記ステントグラフトが展開形態に膨らむと、前記収容された長手方向長さが回復する
ことを含む方法。 - 前記複数の環状ステント要素のうちの前記少なくとも2つを互いに近づけるように動かすことが、前記複数の環状ステント要素のうちの前記少なくとも2つを、約0.5mm〜約2.0mmの間の分離距離から、約0.0mm〜約0.2mmの間の分離距離まで動かすことを含む、請求項24に記載の方法。
- 前記方法が、
バルーン上にカバーを配置し、ここで前記カバーは少なくとも1つの補強部を有し、
前記バルーンが膨張する間に前記ステントグラフトに作用する長手方向の圧縮力を前記カバーの前記補強部が低減するように、前記ステントグラフトを前記カバーの上に配置すること
を更に含む、請求項24に記載の方法。 - 前記ステントグラフトは、前記ステントグラフトが前記圧縮形態から展開形態に膨らむ際に、99%超の長手方向の効率を示す、請求項24に記載の方法。
- 展開システムを作製する方法であって、ステントグラフトを展開機器に組み付けることを含み、ここで前記ステントグラフトは、第1の自由端、第2の自由端、前記第1の自由端と前記第2の自由端との間の中間部、及び未展開状態で第1の直径を有し、前記展開機器はバルーン及び前記バルーンを囲むカバーを有し、前記ステントグラフトは、前記ステントグラフトが前記カバー及び前記バルーンを囲むように前記展開機器に組み付けられ、前記ステントグラフトの前記中間部は、前記バルーンの膨張に抵抗を付与し、前記カバーも前記バルーンの膨張に抵抗を付与して前記ステントグラフトの前記第1の自由端及び前記第2の自由端での前記バルーンの膨張率と前記ステントグラフトの前記中間部での前記バルーンの膨張率との差を低減し、その結果、前記バルーンが膨張して前記ステントグラフトを前記未展開状態から前記展開状態に移行させる際の前記ステントグラフトの長手方向の圧縮を低減する、方法。
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