JP5227344B2 - インプラント、マンドレル、およびインプラント形成方法 - Google Patents
インプラント、マンドレル、およびインプラント形成方法 Download PDFInfo
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Description
本発明は、1つの実施形態では、動脈瘤のような血管部位への詰め込みを最適化するように設計された三次元コイルを備えるインプラントに関するものである。本発明のインプラントは、その二次的形状のために、血管部位へ実質的に適合することができ、それによっていっそう効果的な塞栓形成をもたらす、ということが予想される。特に、本発明の三次元コイルの形状は、1つ以上の閉じられていないメビウスループで構成されている。
例えば、本発明は以下の項目を提供する。
(項目1)
1つ以上の閉じられていないメビウスループを備えている三次元血管内コイル。
(項目2)
巻き付けパターンに適合するように偏倚されたコイル長さを有しているコイルを備えてなり、前記巻き付けパターンは、球体の外側表面の形状にほぼ適合しており、前記巻き付けパターンには、その形状を覆うように配置された、少なくとも1つの閉じられていないメビウスループがあるインプラント。
(項目3)
前記巻き付けパターンには、その形状を覆うように配置された、複数の閉じられていないメビウスループがある項目2に記載のインプラント。
(項目4)
前記巻き付けパターンは、前記形状を覆うように配置された8つの実質的三角形部分をさらに備えている項目2に記載のインプラント。
(項目5)
前記三角形には中心があり、かつ、4つの三角形には、前記中心から外方へ離れるように湾曲している側面がある項目4に記載のインプラント。
(項目6)
前記三角形には中心があり、かつ、4つの三角形には、前記中心へ向かって内方へ湾曲している側面がある項目4に記載のインプラント。
(項目7)
前記巻き付けパターンは、少なくとも第1型曲線および第2型曲線を有している少なくとも1つのループをさらに備え、前記第1型曲線は、球体の形状に対応しており、前記第2型曲線は、少なくとも1つのループの通路に沿って配置された8つの実質的三角形部分に対応する複数の曲線を備えている項目2に記載のインプラント。
(項目8)
前記コイルは、血管部位へ実質的に適合している項目1または2に記載のインプラント。
(項目9)
前記コイルは、金属ワイヤからなっている項目1または2に記載のインプラント。
(項目10)
前記ワイヤは、白金、パラジウム、ロジウム、レニウム、イリジウム、金、銀、タングステン、タンタル、これらの金属の2つ以上からなる合金、あるいは超弾性金属から構成される群から選択された金属からなっている項目9に記載のインプラント。
(項目11)
前記ワイヤは、白金合金である項目10に記載のインプラント。
(項目12)
項目1または2のインプラントを送出装置によって血管部位へ送出し、それによって、前記血管部位を塞栓する患者の血管部位の塞栓方法。
(項目13)
前記インプラントは、前記血管部位へ実質的に適合する項目12に記載の方法。
(項目14)
付加的なインプラントを前記血管部位へ送出するステップを備えている項目13に記載の方法。
(項目15)
表面に配置された4つのマーカーを有している球体であって、それぞれのマーカーが前記球体の前記表面に当接する円筒によって画定されている球体を備え、
前記マーカーどうしの間における前記球体の前記表面は、前記球体の前記表面に十字状に交差する巻き付けパターンと、隣接する前記マーカーどうしの間における前記球体の前記表面に前記巻き付けパターンの複数の交差点を画定する複数の中間点とを画定しているマンドレル。
(項目16)
前記4つのマーカーのうちの1つから延出している軸部をさらに備えている項目15に記載のマンドレル。
(項目17)
このマンドレルは、約0.5〜約0.75の、球体直径に対するマーカー直径の比を有している項目16に記載のマンドレル。
(項目18)
前記の比は、約0.55〜約0.7である項目17に記載のマンドレル。
(項目19)
前記の比は、約0.61〜約0.65である項目18に記載のマンドレル。
(項目20)
前記マーカーは、前記マーカーの半径方向の一番端にキャップを備えている項目15に記載のマンドレル。
(項目21)
前記キャップは、前記マーカーの外径よりも大きい外径を有している項目20に記載のマンドレル。
(項目22)
前記マーカーのそれぞれは、前記球体の中心を通る軸を画定している項目15に記載のマンドレル。
(項目23)
前記軸部を有している前記マーカーの前記軸は、他の3つの軸に比べて約19.5度の傾斜がある項目22に記載のマンドレル。
(項目24)
前記残りの3つの軸は、互いに対して約120度の水平角がある項目23に記載のマンドレル。
(項目25)
マンドレルによりコイルを形成する方法であって、
初めの巻き付けを形成するために、前記マンドレルのマーカーの周りに前記コイルを巻き付けるステップ、および
前記コイルを前記マンドレルの前記表面に配置された4つのマーカーのそれぞれの間で前記マンドレルの前記表面に十字状に交差させて巻き付け、少なくとも1つの閉じられていないメビウスループを設けるステップを、備えてなり、前記巻き付けステップは、隣接する2つのマーカーのそれぞれの間に前記マンドレル中間点の外側表面に配置された複数の中間点のそれぞれを越えて前記コイルを交差させることを含んでいるコイルを形成する方法。
(項目26)
前記マンドレルと前記マンドレルの周りに巻き付けられた前記コイルとを加熱するステップをさらに備えている項目25に記載の方法。
(項目27)
前記コイルを前記マンドレルから取り外すステップをさらに備えている項目26に記載の方法。
(項目28)
前記コイルは、複数の閉じられていないメビウスループを設けるために、巻き付けられる項目25に記載の方法。
本発明のインプラントは血管部位を塞栓するために使用することができる。このことは、以下で説明される図1A、図1B、図1C、および図1Dに最もよく示されている。この送出方法は予想される1つの実施形態であること、また、本発明のインプラントは当業者に知られた他のさまざまな方法で送出することができることに留意すべきである。
本発明は、1つの実施形態では、巻き付けパターンに適合するように偏倚(バイアス)されたコイル長さのあるインプラントに関するものであり、その巻き付けパターンは球体の外側表面の形状にほぼ適合している。この巻き付けパターンには、その形状を覆うように配置された、少なくとも1つの閉じられていないメビウスループ(あるいは、複数の閉じられていないメビウスループ)がある。メビウスループは、そのコイルの両端部の方向を変えるとともに、これら両端部を接合する前に一方端部を半回折り返すことによって形成されるものである。このことは、図7Cに最もよく示されている。本発明において、メビウスループが閉じられていないということは、両端部が接合されていないという意味である。メビウスループは、単一の表面を有している細長片であるとともに対掌性のものである。
1つの実施形態では、コイル60は、体内で使用されるときに組織および体液に悪影響を及ぼすことのない生体適合性の金属から作られている。このワイヤは、円形、正方形、楕円形、三角形、あるいは別の形状でもよい。ある実施形態では、このワイヤには一般に、約0.025〜約0.09mm、約0.03〜約0.08mm、約0.04〜約0.06mmの直径がある。ある特定の実施形態では、このワイヤには約0.05mmの直径がある。いくつかの実施形態では、このワイヤは、一次的形状、例えば、単純な単一らせんからだけ構成することができる。いくつかの実施形態では、このワイヤ構成要素は、例えばらせんコイルのような一次的形状と、二次的形状とから構成することができる。
上記のように、本発明のコイルは、改造が含まれるさらに別の処理を受けることもでき、また、他の諸構成要素が備わっているインプラントとともに使用することもできる。1つの実施形態では、このインプラントは、この明細書と同日に代理人整理番号355492−7551として提出され、かつ、発明の名称が「コイルおよび耐伸張性部材が含まれているインプラント」であり、その内容が参照によってこの明細書に引用されている米国特許出願番号第12/ , ,号明細書の中に記載されたような耐伸張性部材が含まれるように改造されている。
[実施例1−インプラントの製造方法]
本発明のインプラントは次の手順によって作ることができる。
1.マイクロスコープのもとで、上記のワイヤあるいはコイルの遠位端を始動用チューブの中へ挿入する。
2.上で、また図8において記載されたように、上記コイルをマンドレルの周りに巻き付ける。
3.上記コイルおよび上記マンドレルを熱設定する。その温度は約550℃〜約650度である。
本発明のコイルは、試験されて、立方体状三次元(3−D)形状および球状(あるいは回転楕円体状)3−D形状を有しているコイルと比較された。臨床医は、上記血管部位の中へ詰めるためのコイルの機能と、上記血管部位の形状に適合するためのコイルの機能とを評価した。
本発明のコイルは実施例1によって得られた。本発明のメビウスループコイルは、4つの8ミリメートル(mm)マーカーがある10ミリメートル球体に作られた。立方体3−Dを有しているコイルは、6つのマーカー(本発明のコイルを得るためには4つのマーカーと違って)を有しているマンドレルの周りにワイヤを上記立方体のそれぞれの面に1回巻き付けることで、作られた。1つのマーカーは5mmであり、他の5つのマーカーは8mmであった。上記球体は10mmであった。8つのマーカーがあるベースマンドレルの周りにワイヤを巻き付けることによって、球状コイルが得られた。この球体は再び10mmであったし、また、上記マーカーは約5mmであった。
Claims (9)
- 巻き付けパターンに適合するように偏倚されたコイル長さを有する三次元血管内コイルを含むインプラントであって、
前記巻き付けパターンは、球体の外側表面の形状にほぼ適合しており、前記巻き付けパターンは、前記形状を覆うように配置された複数の閉じられていないメビウスループを有し、
前記巻き付けパターンは、前記形状を覆うように配置された8つの実質的に三角形の部分をさらに含み、前記三角形は、中心を有し、前記三角形のうちの4つは、前記中心から外側に向かって湾曲している辺を有し、前記三角形のうちの4つは、前記中心に向かって内側に湾曲している辺を有する、インプラント。 - 前記巻き付けパターンは、第1の型の曲線と第2の型の曲線を少なくとも有する少なくとも1つのループをさらに含み、前記第1の型の曲線は、球体の形状に対応し、前記第2の型の曲線は、少なくとも1つのループの通路に沿って配置された8つの実質的に三角形の部分に対応する複数の曲線を含む、請求項1に記載のインプラント。
- 前記コイルは、血管部位に実質的に適合している、請求項1に記載のインプラント。
- 前記コイルは、金属ワイヤを含む、請求項1に記載のインプラント。
- 前記ワイヤは、白金、パラジウム、ロジウム、レニウム、イリジウム、金、銀、タングステン、タンタル、これらの金属のうちの2つ以上からなる合金、あるいは超弾性金属から構成される群から選択された金属を含む、請求項4に記載のインプラント。
- 前記ワイヤは、白金合金である、請求項5に記載のインプラント。
- マンドレルを用いて三次元血管内コイルを形成する方法であって、前記方法は、
初めの巻き付けを形成するために、前記マンドレルのマーカーの周りに前記コイルを巻き付けることであって、前記コイルは、巻き付けパターンに適合するように偏倚された長さを有し、前記巻き付けパターンは、球体の外側表面の形状にほぼ適合している、ことと、
前記コイルを前記マンドレルの表面に配置された4つのマーカーのそれぞれの間で前記マンドレルの表面を横切るように巻き付けることにより、複数の閉じられていないメビウスループを提供することであって、前記巻き付けことは、隣接する2つのマーカーのそれぞれの間に前記マンドレルの外側表面の中間に配置された複数の中間点のそれぞれにおいて前記コイルを前記コイル自身を横切るように交差させることを含む、ことと
を含み、
前記巻き付けパターンは、前記形状を覆うように配置された8つの実質的に三角形の部分をさらに含み、前記三角形は、中心を有し、前記三角形のうちの4つは、前記中心から外側に向かって湾曲している辺を有し、前記三角形のうちの4つは、前記中心に向かって内側に湾曲している辺を有する、方法。 - 前記マンドレルと前記マンドレルの周りに巻き付けられた前記コイルとを加熱することをさらに含む、請求項7に記載の方法。
- 前記コイルを前記マンドレルから取り外すことをさらに含む、請求項8に記載の方法。
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-
2008
- 2008-02-27 JP JP2009553681A patent/JP5227344B2/ja active Active
- 2008-02-27 KR KR1020097021291A patent/KR20100015521A/ko not_active Application Discontinuation
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EP2124763A2 (en) | 2009-12-02 |
CN101677821B (zh) | 2014-05-14 |
EP2124763B1 (en) | 2014-08-13 |
CA2680793A1 (en) | 2008-09-18 |
CN101677821A (zh) | 2010-03-24 |
KR20100015521A (ko) | 2010-02-12 |
JP2010521232A (ja) | 2010-06-24 |
AU2008226695A1 (en) | 2008-09-18 |
AU2008226695B2 (en) | 2013-05-02 |
CA2680793C (en) | 2015-07-07 |
US8801747B2 (en) | 2014-08-12 |
WO2008112436A3 (en) | 2008-11-20 |
WO2008112436A2 (en) | 2008-09-18 |
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