JP2012513294A - 体腔から閉塞性物質を除去しそして血管障害を治療するシステムおよび方法 - Google Patents
体腔から閉塞性物質を除去しそして血管障害を治療するシステムおよび方法 Download PDFInfo
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Abstract
Description
本PCT国際出願は、2002年7月23日出願の米国特許仮出願第60/398,071号に基づき優先権を主張する、2003年7月21日出願の米国特許出願第10/623,875号の継続出願であり現在米国特許第7,309,334号として発行されている、2007年11月7日出願の同時係続米国特許出願第11/936,632号の一部継続出願である、2008年12月23日出願の米国特許出願第12/343,374号に基づき優先権を主張し、これら出願のそれぞれの全ての開示はここに参照として取り込まれる。
本発明は、一般に、医療機器および方法に関し、より詳細には、脳の血管等の血管内の閉塞物の除去および血管内の障害の治療に使用できるカテーテル系システムおよび方法に関する。
脳卒中は米国において一般的な死亡原因であり、障害を引き起こす神経疾患である。年間およそ700,000人の患者が脳卒中を患っている。脳卒中は、中枢神経系の局所的併発を反映する、少なくとも24時間持続する神経学的欠損の急性発症により特徴付けられる症候群であり、中枢神経系の単状病変を反映し、そして脳循環の障害の結果に起こるものである。その発生率は年齢とともに増加する。脳卒中のリスク因子として、収縮期または拡張期高血圧、高コレステロール血症、喫煙、アルコール飲料の大量摂取、および経口避妊薬の使用等がある。
本発明の一つの特徴によると、ヒトまたは動物の被験体の体内の部位での治療または診断の実施に使用可能なシステムが提供され、このようなシステムは、a)近位部分、遠位部分、管腔、および遠位端開口部を備えるカテーテルであって、遠位部分が近位部分の外径よりも小さい第一の外径を有する第一の構成から、遠位部分が第一の外径よりも大きいが近位部分の外径よりも大きくない第二の外径まで拡張している第二の構成へ移動可能であるカテーテルと、b)少なくとも、カテーテルの遠位部分がその第二の構成にある時に、カテーテル管腔を通って遠位開口部外に出るように進めることができる作業手段であり、該作業手段は、治療または診療を実施可能である。本システムに使用可能なこのような種類の作業手段の例として、i)血栓またはその他の閉塞物質を体腔から除去するための手段、ii)体腔内の閉塞物中またはその周りの流体の流れを促進させるのに使用可能な血流回復手段、およびiii)インプラント(例えば、埋込み型閉塞コイルまたは埋込み型塞栓手段)を配置または送達するための手段が挙げられるが、これらには限られない。
本発明の様々な特徴を実施する一般的な構成を以下に図面を参照しながら説明する。図面および関連する記載は、本発明のいくつかの態様または実施例を概説するものであるがすべてを記載するものではなく、請求する本発明の範囲をどのようにも限定するものではない。すべての図面において、参照番号は、参照要素間の対応を示すために再度使用されている。
本明細書に開示の本発明は、その精神または本質的な特徴から逸脱することなく、その他の特定の態様で具体化され得る。記載されている実施態様は、すべての点において概説的なものとしてのみ考えられるべきものであり、限定的なものではない。したがって、本発明の範囲は、以下の記載よりもむしろ添付の特許請求の範囲により示される。特許請求の範囲の意味および等価物の範囲内のいかなる変更も本発明の範囲に含まれる。
図34Bは、マイクロカテーテル3400の側面図を示し、遠位の拡張可能なメッシュ3406が、メッシュ3406の固定された遠位端3408に対して相対的な、メッシュの近位端3406の遠位的動きにより拡張されている。メッシュの近位端3406を遠位的に進めることは、ガイドワイヤ3422を取り囲む環状スリーブ3430により加えられた力で達成でき、環状スリーブ3430は、カテーテルの管腔3402内に摺動可能に配置された摺動部3412を動かす力を及ぼす。摺動部3412は、従ってメッシュの近位端3406に取付けられている、継輪部−摺動部結合部3418により外側継輪部3410に取付けられている。継輪部3410および摺動部固定要素3418は、窓部3404を通ってカテーテル管3402の側面で突出しており、窓部3404は管3402の壁を完全に貫通している。
カテーテルにより送達されるこのような拡張可能な構造は、再狭窄の治療または予防、炎症の軽減または治療等のための薬剤の送達のために、冠状動脈または神経血管系における、経皮経管冠動脈形成術(PTCA)、経皮的バルーン血管形成術(POBA)、またはステント留置の後に使用できる。薬剤送達用装置は、カテーテルハブ上の注入ポートに操作可能に接続され、そしてカテーテルの遠位端に近い、または拡張可能な部位に近い、カテーテルの開口部に操作可能に接続されている、カテーテル内で、流体送達管腔を備える。抗血小板薬として役立つことのできる、装置により送達される薬剤として、チクロピジン、クロピドグレル、アスピリン等が挙げられるが、これらには限られない。手段により送達される薬剤は、再狭窄の治療に使用でき、これらの薬剤として、これらには限らないが、シロリムス、パクリタキセル、メトトレキサート、エベロリムス、バイオリムスA9、ゾタロリムス等が挙げられ、これらは一般に抗ガン治療に用いられる薬剤群に属する。炎症の治療に用いられる薬剤として、アスピリン、イブプロフェン、ナプロキセンナトリウム、ステロイド類等が挙げられるが、これらには限られない。血管痙攣または血管攣縮を治療する薬剤として、パパベリン等が挙げられる。血栓症を治療するために使用する薬剤として、組織プラスミノーゲン活性化因子、ストレプトキナーゼ、ウロキナーゼ、リソキナーゼ、スタフィロキナーゼ、プラスミノゲンをフィブリノリジンに変換する薬剤、フィブリノリジン、フィブリン溶解薬等が挙げられるが、これらには限られない。
Claims (6)
- ヒトまたは動物の被験体の体内の部位での治療または診断を実施するために適応したカテーテルであって、
前記カテーテルは、近位部分、遠位部分、管腔、および遠位端開口部を有し、前記カテーテルは、前記遠位部分が、前記近位部分の外径よりも小さい第一の外径を備える第一の構成から、遠位部分が第一の外径よりも大きいが近位部分の外径よりも大きくない第二の外径に拡張する第二の構成への移動が可能であり、前記カテーテルは前記遠位部分に対して近位のポートをさらに備え、このポートはカテーテル外部から管腔への流体連結を可能とする、
カテーテル。 - ヒトまたは動物の被験体の体内の部位での治療または診断を実施するために適応したカテーテルであって、
前記カテーテルは、近位部分、遠位部分、遠位部分に沿って配された複数のポート、それを通じて延びる管腔、および遠位端開口部を備え、前記複数のポートはカテーテルの近位端で管腔を通って注入されたX線非透過性色素を排出することができる、
カテーテル。 - 閉塞した体腔内から体液の流れを回復させる方法であって、
前記方法は、以下の工程:
a)近位部分、遠位部分、管腔、遠位端開口部、および遠位部分の近位にある窓部を有するカテーテルを被験体の体内に挿入する工程であって、この窓部はカテーテル外部から管腔への流体連結を可能にし、前記カテーテルは、前記遠位部分が前記近位部分の外径よりも小さい第一の外径を有する第一の構成から、遠位部分が第一の外径よりも大きいが近位部分の外径よりも大きくない第二の外径に拡張する第二の構成へ移動可能である、工程、
b)カテーテルの遠位部分がその第一の構成にある状態で、所望の体腔内の遠位端開口部の位置を定める工程、
c)体腔内で閉塞物に十分に貫通しそして遠位端が閉塞していない体腔内にあり、そして前記窓部が閉塞物の近位にありそして閉塞していない体腔内にあるように、カテーテルを体腔内で閉塞物を通して進める工程、
d)カテーテルの遠位部分をその第二の構成に移動させる工程、
e)血液が窓部に流入しそしてカテーテルの遠位端開口部から流出する、血流を回復させる工程、
を含む、方法。 - ヒトまたは動物の被験体の体内の部位での治療または診断を実施するための方法であって、
前記方法は、以下の工程:
a)近位部分、遠位部分、遠位部分に沿って配された複数のポート、管腔、および遠位端開口部を有するカテーテルを被験体の体内に挿入する工程であって、前記複数のポートは、カテーテルを通じて注入されたX線非透過性色素をカテーテルから排出することを可能とする工程、
b)所望の体腔内で遠位端開口部の位置を定める工程、
c)閉塞物に十分に貫通しそして遠位端が閉塞していない体腔内にありそして複数のポートの少なくとも1つが閉塞物の近位にありそして閉塞していない体腔内にあるように、カテーテルを閉塞物を通って体腔内で進める工程、
d)X線非透過性色素を、閉塞物の遠位にある遠位端開口部と閉塞物の近位にある複数のポートの少なくとも1つを通ってカテーテルから排出されるように、前記色素をカテーテルの管腔内に注入する工程、
e)カテーテルから排出される近位および遠位の色素間の間隔を観察し、閉塞物の範囲の目安を与える工程、
を含む、方法。 - ヒトまたは動物の被体者の体内の部位での治療または診断を実施するために適用されるシステムであって、
前記システムは、以下:
近位部分、遠位部分、その間を延在する管腔、および遠位端開口部を備える、軸方向に細長いカテーテルであって、前記遠位部分が、少なくとも1つのレールと膨張可能な外膜を備え、前記レールは低摩擦をもたらし、前記膨張可能な外膜の内部に取付けられていて、カテーテルの縦軸に平行に配向されており、前記カテーテルは、前記遠位部分が、前記近位部分の外径よりも小さい第一の外径を有する第一の構成から、遠位部分が第一の外径よりも大きいが近位部分の外径よりも大きくない第二の外径に拡張する第二の構成へ移動可能である、カテーテルと、
遠位部位と非穿孔部位とを備える拡張器であり、前記遠位部位が、螺旋コイル部位と、この螺旋コイル部位の近位に配置された細目の蛇状カット部位およびこの細目の蛇状カット部位の近位に配置された粗目の蛇状カット部位を備え、前記非穿孔部位が、ある程度の可撓性を与え、そして前記粗目の蛇状カット部位の近位に配置され、前記より粗目の蛇状カット領部位が非穿孔部位よりも可撓性を有するが、細目の蛇状カット部位よりも可撓性が低くいものであり、そして、前記細目の蛇状カット部位は螺旋コイル部位よりも可撓性が低いものである、拡張器、
を備える、システム。 - ヒトまたは動物の被験体の体内の部位での治療または診断を実施するための方法であって、
前記方法は、以下の工程:
a)近位部分、遠位部分、管腔、および遠位端開口部を有するカテーテルを被験体の体内に挿入する工程であって、前記遠位部分が、少なくとも1つのレールおよび膨張可能な外膜を備え、前記レールが、前記膨張可能な外膜の内部に取付けられており、前記カテーテルは、前記遠位部分が、前記近位部分の外径よりも小さい第一の外径を有する第一の構成から、遠位部分が第一の外径よりも大きいが近位部分の外径よりも大きくない第二の外径に拡張する第二の構成へ移動可能である、工程、
b)前記カテーテルの遠位部分がその第一の構成にある状態で、所望の体腔内で遠位端開口部の位置を定める工程、
c)前記拡張器を前記カテーテルに対して相対的に遠位に進める工程であって、前記拡張器が、遠位部位と非穿孔部位を備え、前記遠位部位は、螺旋コイル部位、螺旋コイル部位の近位に配置された細目の蛇状カット部位、およびこの細目の蛇状カット部位の近位に配置された粗めの蛇状カット部位を備え、前記穿孔部位がより粗目の蛇状カット部位の近位に配置されており、前記より粗目の蛇状カット部位は、非穿孔部位よりも可撓性が高いが、細目の蛇状カット部位よりも可撓性が低く、そして前記細目の蛇状カット部位が、螺旋コイル部位よりも可撓性が低く、前記カテーテルの前記遠位部分を第二の構成に移動させるものである、工程、
d)作業装置をカテーテルの管腔内に通し、遠位開口部から出す工程、および
e)前記作業手段を用いて前記治療または診断を実施する工程、
とを含む、方法。
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| US12/343,374 | 2008-12-23 | ||
| US12/343,374 US8425549B2 (en) | 2002-07-23 | 2008-12-23 | Systems and methods for removing obstructive matter from body lumens and treating vascular defects |
| PCT/US2009/069498 WO2010075565A2 (en) | 2008-12-23 | 2009-12-23 | Systems and methods for removing obstructive matter from body lumens and treating vascular defects |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150359549A1 (en) | 2015-12-17 |
| US9078682B2 (en) | 2015-07-14 |
| WO2010075565A3 (en) | 2010-10-28 |
| US20100114017A1 (en) | 2010-05-06 |
| US10722255B2 (en) | 2020-07-28 |
| US20120101510A1 (en) | 2012-04-26 |
| EP2381997A2 (en) | 2011-11-02 |
| WO2010075565A2 (en) | 2010-07-01 |
| US8425549B2 (en) | 2013-04-23 |
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