JP2008521561A - 塞栓コイル - Google Patents
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
- A61B17/12145—Coils or wires having a pre-set deployed three-dimensional shape
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Abstract
Description
塞栓コイルは、約2.27g〜約22.7g(約0.005ポンド〜約0.05ポンド)の有効カラム強度を有する。
医療機器は、プッシャーワイヤを含むことができる。一部の実施形態において、プッシャーワイヤは、管状部材又は管状体の管腔内に配置されてもよく、塞栓コイルに取り付けられる。
一部の実施形態において、塞栓コイルは、被験者の体内の対象箇所に送達される場合、比較的良好な閉塞特性を示すことができる。それによって、例えば、塞栓コイルを用いて血管の閉塞(例えば、腫瘍の塞栓化)、動脈瘤の治療、動静脈奇形の治療、及び/又は外傷性瘻孔を治療することができる。
一部の実施形態において、塞栓コイルは、比較的高い有効カラム強度を有している一方で、被験者の体内の対象箇所に送達される場合に比較的良好な閉塞特性を示す。
図4Aに示すように、コイル形成装置200は、2つの回転可能チャック220、230により保持された心棒210を含む。ワイヤ250のスプール240は、心棒210の上方に配置され、移動装置260に取り付けられている。塞栓コイルを一次形状に形成するには、チャック220、230を始動し、それらを矢印A2、A3の方向に回転させて、心棒210を回転させる。移動装置260も始動させ、スプール240を矢印A1の方向に移動させる。心棒210の回転により、ワイヤ250がスプール240から所定の引き込み角度で引き込まれて、ワイヤ250が心棒210周囲に巻き取られる。図4Aに示すように、引き込み角度αは、心棒210の長軸LA1に対し垂直な軸PA1とスプール240及びコイル270間のワイヤ250の部分280とがなす角度である。一部の実施形態において、αは約1°〜約6°(例えば、約1.5°〜約5°、約1.5°〜約2.5°、約2°)である。ある種の実施形態において、制御装置(例えば、プログラマブル論理制御装置)を用いて、コイル形成装置200における引き込み角度を維持することができる。心棒210がワイヤ250をスプール240から引っ張るのに伴い回転するため、また、移動装置260が矢印A1の方向にスプール240を移動させるため、ワイヤ250から心棒210を中心として一次形状をなすコイル270が形成される。コイル270は、例えば室温(25℃)で形成される。
両チャック220、230間に保持されているときの心棒210の張力は、好ましくは、巻き取り工程時における心棒210の振動を回避するのに十分高く、巻き取り工程時の心棒210の伸張を回避するのに十分低くなっている。場合によっては、巻き取り工程時の心棒210の伸張がかなり大きいため、これにより、コイル270の一次形状が所望のものより小さくなる可能性があり、及び又は心棒210からのコイル270の取り出しが比較的難しくなる虞がある。実施形態において、心棒210の張力は約100g〜約1000g(例えば、約300g〜約600g、約400g〜約500g)である。例えば、心棒210の張力は約506gである。
図5Aは、コイル270の二次形状を形成するのに用いられる心棒310を示す。心棒310は菱形に形成されているが、他の種類の心棒を用いて、他の二次形状に形成してもよい。心棒310は、表面に切り込まれた溝330を有する菱形状のブロック320から形成される。図5B及び図5Cに示すように、一次コイル270が心棒310の周囲に巻き取られる。この場合、コイル270が溝330を埋められて二次形状が形成される。次に、コイル270の両端を心棒310に取り付け(例えば、ピン止め)、コイル270を約37.7℃〜約1093℃(約100°F〜約2000°F)(例えば、約260℃〜約816℃(約500°F〜約1500°F)、約543℃〜約607℃(約1010°F〜約1125°F))の温度に加熱処理してコイル270に記憶を与える。例えばコイル270は、約593℃(約1100°F)の温度で加熱処理される。一部の実施形態において、コイル270の加熱処理は、約10分間〜約40分間(例えば、約25分間)かけて行われる。加熱処理した後、コイル270を心棒310から抜き取る。心棒310からコイル270を取ることで、コイル270は二次形状を再び有するようになる。一部の実施形態において、コイル270が心棒310から抜き取られた後、コイル270の一端部又は両端部を加熱及び融解して、より丸く、より生体適合性の高い(例えば、非外傷性)末端を形成することができる。
コイル270を心棒310から取り出した後、ファイバーをコイル270に取り付けることができる。一部の実施形態において、コイル270を延ばしてからファイバーが取り付けられることで、コイル270は、延伸した一次形状を有するようになり、その後、ファイバリング心棒(例えば、カルフォルニア州サンタクララ所在のセマツール・モールド・アンド・ダイ社より市販されるファイバリング心棒)上に取り込まれる。一部の実施形態において、ファイバーは、ワイヤ250に結合させるか、及び又はワイヤ250の周囲に巻き取られる。ある種の実施形態において、ファイバーは、コイル270のワイヤ250の巻き線間に嵌め込むことができる。それとは別に又はそれに加えて、ファイバーをコイル270のワイヤ250に対し例えば接着剤により接着してもよい。
一例として、一部の実施形態において、相対的に小さい外径の領域及び相対的に大きい直径の領域を有する一次形状のコイルは、一定の直径で、ワイヤを心棒の周囲に巻き取られて形成され、ワイヤに付与される張力を変化させて形成される。例えば、約10g〜約100g(例えば、約6g〜約50g、約30g〜約40g)の張力が相対的に小さい外径の領域を形成するために付与され、約4g〜約80g(例えば、約4g〜約40g、約25g〜約29g)の張力が相対的に大きい外径の領域を形成するために付与される。ある種の実施形態において、相対的に小さい外径の領域を形成するのに用いられる張力と相対的に大きい外径の領域を形成するのに用いられる張力との差は、約5g〜約90g(例えば、約20g〜約80g、約30g〜約50g)である。
別の例として、一部の実施形態において、他の閉塞装置とコイルを併用することで処置部位を閉塞してもよい。例えば、2004年5月20日公開のバイザーらの米国特許出願公開第2003/0185896A1号及び米国特許出願公開第US2004/0096662A1号に記載の塞栓粒子と共にコイルを用いてもよい。なお、両文献はいずれも参照として本明細書に組み込まれている。一部の実施形態において、コイルは、1以上の塞栓ゲルと併用することができる。塞栓ゲルは、例えば2004年8月27日に出願された「塞栓」という名称の米国特許出願第10/927868号に記載されている。なお、この文献も参照として本明細書に組み込まれている。
Claims (25)
- 第1の外径及び前記第1の外径より小さい第2の外径を有する一次形状のワイヤを含む塞栓コイルであって、
前記塞栓コイルは、被験者の管腔内に嵌合するように形成されている塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記第1の外径は、約0.076cm(約0.03インチ)以下である塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記第2の外径は、約0.064cm(約0.025インチ)以下である塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記第1の外径と前記第2の外径との差は、約0.061cm(約0.024インチ)以下である塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記第1の外径と前記第2の外径との比は、少なくとも約1.05:1である塞栓コイル。 - 請求項1記載の塞栓コイルは、更に
前記ワイヤに取り付けられた少なくとも1つのファイバーを有する塞栓コイル。 - 請求項6記載の塞栓コイルにおいて、
前記少なくとも1つのファイバーは、前記第2の外径を有する前記ワイヤの領域に取り付けられている塞栓コイル。 - 請求項6記載の塞栓コイルにおいて、
前記少なくとも1つのファイバーは、ポリエチレンテレフタレート又はナイロンからなる塞栓コイル。 - 請求項6記載の塞栓コイルにおいて、
前記少なくとも1つのファイバーは、約0.5mm〜約5mmの長さを有する塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記塞栓コイルは、約2.27g〜約22.7g(0.005ポンド〜約0.05ポンド)の有効カラム強度を有する塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記ワイヤは、約0.003cm〜約0.013cm(0.001インチ〜0.005インチ)の直径を有する塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記ワイヤは、金属からなる塞栓コイル。 - 請求項1記載の塞栓コイルにおいて、
前記ワイヤは、J字形、菱形、渦形又は螺旋形の二次形状を有する塞栓コイル。 - 塞栓コイルの製造方法において、
ワイヤを、第1の外径及び前記第1の外径より小さい第2の外径を有する一次形状にして前記塞栓コイルを形成するステップを有する方法。 - 請求項14記載の方法において、
ワイヤを一次形状にするステップは、心棒の周囲に前記ワイヤを巻き取るステップを有する方法。 - 請求項15記載の方法において、
前記心棒は、第3の外径及び前記第3の外径より小さい第4の外径を有する方法。 - 請求項14記載の方法において、
ワイヤを一次形状にするステップは、前記ワイヤを約25℃の温度にするステップを有する方法。 - 請求項14記載の方法は、更に
前記ワイヤに少なくとも1つのファイバーを取り付けるステップを有する方法。 - 請求項18記載の方法において、
前記少なくとも1つのファイバーは、前記第2の外径を有する前記ワイヤの領域に取り付けられる方法。 - 請求項14記載の方法において、
ワイヤを一次形状にするステップは、前記ワイヤに第1の張力を加えて心棒の周囲に前記ワイヤの第1の領域を巻き取るステップ、及び前記ワイヤに第2の張力を加えて前記心棒の周囲に前記ワイヤの第2の領域を巻き取るステップを有し、前記第2の張力は、前記第1の張力より大きい方法。 - 管腔を画定する管状体、及び
前記管腔内に配置された少なくとも1つの塞栓コイルを有し、
前記少なくとも1つの塞栓コイルは、第1の外径及び前記第1の外径より小さい第2の外径を有する一次形状のワイヤを含む医療機器。 - 請求項21記載の医療機器において、
前記少なくとも1つの塞栓コイルは、複数の塞栓コイルを含む医療機器。 - 請求項21記載の医療機器は、更に
プッシャーワイヤを有する医療機器。 - 請求項23記載の医療機器において、
前記プッシャーワイヤは、前記管状部材の前記管腔内に配置され、かつ前記塞栓コイルに取り付けられている医療機器。 - 請求項21記載の方法において、
前記管状体は、カテーテルからなる方法。
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US8425550B2 (en) | 2013-04-23 |
US20130238012A1 (en) | 2013-09-12 |
AU2005311922A1 (en) | 2006-06-08 |
EP1830718B1 (en) | 2012-12-26 |
US20060116711A1 (en) | 2006-06-01 |
JP4961349B2 (ja) | 2012-06-27 |
CA2588643A1 (en) | 2006-06-08 |
EP1830718A1 (en) | 2007-09-12 |
WO2006060453A1 (en) | 2006-06-08 |
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