JP5662683B2 - 体内に植込型デバイスを展開する装置および方法 - Google Patents
体内に植込型デバイスを展開する装置および方法 Download PDFInfo
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- JP5662683B2 JP5662683B2 JP2009549294A JP2009549294A JP5662683B2 JP 5662683 B2 JP5662683 B2 JP 5662683B2 JP 2009549294 A JP2009549294 A JP 2009549294A JP 2009549294 A JP2009549294 A JP 2009549294A JP 5662683 B2 JP5662683 B2 JP 5662683B2
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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
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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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Description
本発明は、例えば、動脈瘤、破裂、仮性動脈瘤、切開、不安定プラークの排除を含む血管疾患の治療および閉塞状態の治療に関し、より具体的には、本発明は、体内に植込型デバイスを送達および展開して、かかる状態を治療するための装置および方法に関する。本発明は、特に、動脈内または2つ以上の交差する血管を含む他の部位に、ステント、グラフト、およびステントグラフトを移植することに適している。
血管疾患を植込型ステントおよびグラフトで治療することは、従来の技術においてよく知られている。例えば、動脈の狭窄または閉塞部分に、自己拡張またはバルーン拡張可能なステントを間に挿入することは、当該技術においてよく知られている。同様に、グラフトまたはステントグラフトを使用して、血管、特に大動脈の著しく損傷した部分または不安定な部分を修復し、それによって血流を確保して、動脈瘤または破裂の危険性を低減することも、従来の技術においてよく知られている。
本発明は、例えば、以下を提供する:
(項目1)
少なくとも1つの管腔を有するカテーテルと、
近位端および遠位端を有する主要管腔、ならびに該主要管腔に接続され、該主要管腔から側方に延在する少なくとも1つの側枝管腔を備えるステントであって、該カテーテルの遠位端は該側枝管腔内に配置される、ステントと、
該少なくとも1つのカテーテル管腔を通って延在し、該側枝管腔の遠位端に解放可能に取り付けられるストリングであって、該ストリングを該側枝管腔から解放する前に、近位端における該カテーテルの選択的運動が、該遠位端における対応する回転運動をもたらし、該カテーテル遠位端は操作可能である、ストリングと
を備える、ステント装填カテーテルアセンブリ。
(項目2)
上記選択的運動は軸方向並進であり、上記回転運動は前進と後退である、項目1に記載のステント装填カテーテルアセンブリ。
(項目3)
上記選択的運動は回転であり、上記回転運動は横方向である、項目1に記載のステント装填カテーテルアセンブリ。
(項目4)
上記ストリングを選択的に伸長させて、上記側枝管腔のプロファイルを選択的に増加および選択的に減少させるための機構をさらに備える、項目2に記載のステント装填カテーテルアセンブリ。
(項目5)
上記ストリングの末端はそれぞれ、上記カテーテル内の別個の管腔を通って延在し、中心部分は、上記少なくとも1つの側枝管腔の遠位端の尖端を通って織り込まれる、項目1に記載のステント装填カテーテルアセンブリ。
(項目6)
少なくとも1つの管腔を有するカテーテルと、
近位端および遠位端を有する主要管腔、ならびに該主要管腔に接続され、該主要管腔から側方に延在する少なくとも1つの側枝管腔を備えるステントであって、該カテーテル管腔は、減少プロファイルの該ステントを受容するために適合されている、ステントと、
該主要管腔の遠位端の尖端を係合するピンアセンブリであって、該ピンアセンブリはばね荷重が掛けられ、該ばね荷重の解放時に、該ピンアセンブリは該尖端を解放する、ピンアセンブリと
を備える、ステント装填カテーテルアセンブリ。
(項目7)
遠位端および近位端、ならびにそれらの間の構造を有するステントを送達および展開するシステムであって、該構造は、該構造の長さに沿って減少可能である初期プロファイルを有し、該システムは、
該初期プロファイルの該ステントの直径よりも小さい内径を有するカテーテルであって、減少プロファイルの該ステントを受容するように適合されている、カテーテルと、
流体を受容するポート、および該ポートから該流体の漏出を防ぐための該ポートの遠位に少なくとも1つのガスケットを備える管腔であって、該カテーテルの少なくとも一部分はそこを通る該流体の通過によって洗浄される、管腔と
を備える、システム。
(項目8)
カテーテルの血管内送達に適合されたシースであって、
該シースの壁内に埋め込まれ、該シースの長さに沿って延在する編組材料と、
該編組材料内の少なくとも1つのはんだ接合と
を備える、シース。
(項目9)
上記編組材料の長さに沿って間隔が空いている、複数のはんだ接合を備える、項目8に記載のシース。
(項目10)
少なくとも1つの管腔および少なくとも1つの放射線不透過性マーキングを有するカテーテルシースと、
近位端および遠位端を有する主要管腔、ならびに該主要管腔に接続され、該主要管腔から側方に延在する少なくとも1つの側枝管腔とを備えるステントデバイスであって、該カテーテル管腔は、減少プロファイルの該ステントデバイスを受容するように適合されている、ステントデバイスと
を備え、該ステントデバイスは、少なくとも1つの選択的に配置される放射線不透過性マーキングをさらに有し、該ステントデバイス上の該放射線不透過性マーキングを該カテーテルシース上の該放射線不透過性マーキングと整列させることは、該カテーテルシース内での該ステントデバイスの適切な装填を確認する、ステント装填カテーテルアセンブリ。
(項目11)
上記カテーテルシースは、その長さに沿って延在し、かつ、互いから180°離れている2つの放射線不透過性マーキングを有し、上記ステントデバイスは、その長さに沿って延在し、かつ、互いから180°離れている2つの放射線不透過性マーキングを有する、項目10に記載のステント装填カテーテルアセンブリ。
(項目12)
上記ステントデバイスは、ステントと該ステントに係合されるグラフトとを備え、該ステントデバイス上の上記少なくとも1つの放射線不透過性マーキングは該グラフト上にある、項目10に記載のステント装填カテーテルアセンブリ。
ここで図、特に図1Aおよび1Bを参照して、本発明の植込型デバイスの例示的実施形態について説明する。デバイスのそれぞれは、一次または主要管状部材、および少なくとも1つの側方に延在する管状分岐を有するが、しかしながら、本発明の植込型デバイスは、側枝を有する必要はない。
血管に配置することができ、それによって、ステントと血管壁との間に適度な接合を提供する。ステントの適応性は、固定または係止に必要な半径方向力を低下させず、デバイスの移動および内部漏出を回避する。
は可変の剛性/可撓性を有し得るように加工することもできる。より優れた可撓性によって、送達中および移植部位において遭遇する曲線血管系に、より良好に適応できる。かかる特徴は、大動脈弓の比較的「タイトな」湾曲に対して、大動脈弓ステント留置適用において極めて有利である。一方、特に管腔の末端部分において強化された剛性は、より大きな半径方向力を付与し、それによって配置後の血管系内におけるデバイスの移動に耐える。可変の可撓性/剛性は、種々の方法で実装され得る。
本発明のステントは、多くの方法で加工され得る。ステントを形成する1つの方法は、それぞれ図13A〜13Cに示されるようなマンドレルデバイス320、330、および340等のマンドレルデバイスの使用による。デバイスのそれぞれは、複数のピン(図示せず)が選択的に配置されるか、または複数のピンがそこから伸長する、複数の選択的に配置されたピンホール324、334、および344をそれぞれ持つ、少なくとも主要マンドレル構成要素322、332、および342をそれぞれ有する。以下でより詳細に説明されるように、ステント構造は、選択的にワイヤをピンの周りに巻くことによって形成される。ステントが1つ以上の側枝管腔を有する場合、デバイス340等のマンドレルデバイスには、主要マンドレル342に対して実質的に横方向に延在する少なくとも1つの側方マンドレル346が提供され得、側方マンドレルの数は、好ましくは、形成されるステント側枝の数に対応する。マンドレルデバイスは、モジュールであってもよく、種々の直径および長さの側枝マンドレルは、主要マンドレルに取り外し可能に組み立てることができる。主要マンドレルおよび側枝マンドレルの構成は、任意の適切な形状、サイズ、長さ、直径等を有し、所望のステント構成を形成し得る。一般に、マンドレル構成要素は、均一な断面を有する真直ぐな円筒形構成を有するが、長さ寸法に沿って直径の異なる(図13Bを参照)円錐形、円錐台であって(図13Aおよび13Cを参照)楕円形の断面、湾曲形状等を有してもよい。
ここで図2Aおよび2Bを参照して、本発明のデバイスを移植するための本発明のシステム30が示される。システム30は、遠位カテーテル部分32および近位またはハンドル部分34を含む。カテーテル部分32は、血管系または移植部位に至る他の経路内に配置するために構成され、複数の管腔を有する種々の細長い部材を含み、それらの多くは、ガイドワイヤ、プルワイヤ、およびデバイスの一端から他方への流体通路として多機能的である。カテーテル部分32は、その内部に中間部材40が受容される管腔を有する、平行移動可能な外側シース38を含む。外側シース38の近位端は、中間部分40の遠位ハブ52に連結するための接続金具50とともに構成される。接続金具50は、外側部材38の壁と中間部材40の壁との間の管腔空間を流体的に密閉する内部弁機構で構成され、それによってそこからの血液の漏出を避ける。接続金具50は、カテーテル準備において一般的であるように、何らかの残気を排出するための洗浄ポート(図示せず)をさらに含み得る。内側部材42は、中間部材40の管腔138(図6Aを参照)内に受容され、平行移動可能であって、そこを通るガイドワイヤ48の平行移動のための本体ガイドワイヤ管腔44を画定する。内側部材42は、蛇行性の血管系を通るデバイスの前方平行移動を容易にする円錐遠位先端46で終結する。外側部材、中間部材、および内側部材チューブ(ならびに以下に論じる任意のカテーテル構成要素)は、従来の血管内シースおよびカテーテルを構成するために使用される材料から形成され得、編み材料で強化された生体適合性プラスチック、または実質的に可撓性のある任意の他の生体適合性材料を含むが、それらに限定されない。
対象デバイスの一部に対する移植処置について、ここで図8A〜8Aに関して説明され、そして、図1Aで示されるように、本体管腔4および3つの側枝管腔6a、6b、および6cを有する本発明のステントグラフト2が、大動脈弓5内に経皮的に移植される大動脈弓適用の状況において、移植時に、本体管腔4は大動脈弓5内に存在し、3つの側枝管腔6a、6bおよび6cは、図8Hで説明されるように、腕頭動脈7a、左総頸動脈7b、および左鎖骨下動脈7cにそれぞれ存在する。
Claims (8)
- ステント装填カテーテルアセンブリであって、該ステント装填カテーテルアセンブリは、
少なくとも1つの管腔を有するカテーテルと、
近位端および遠位端を有する主要管腔と、該主要管腔に接続され、該主要管腔から側方に延在する少なくとも1つの側枝管腔とを備えるステントであって、該カテーテルの遠位端は、該側枝管腔内に配置され、該側枝管腔の遠位端は、尖端で終端する、ステントと、
該少なくとも1つのカテーテル管腔を通って延在する1つのストリングであって、該ストリングの両端は、該カテーテルアセンブリの近位端内に保持され、該ストリングの中間部分は、該側枝管腔の該遠位端の該尖端のすべてを通って糸を通すかまたは織り込むことによって、該側枝管腔の該遠位端に解放可能に取り付けられることにより、該カテーテルの外側に該側枝管腔の該遠位端を保持かつ固定し、該ストリングを該側枝管腔から解放する前に、近位端における該カテーテルの選択的運動が、該遠位端における対応する回転運動をもたらし、該カテーテル遠位端は、操作可能であり、該選択的運動は、回転であり、該回転運動は、横方向である、ストリングと、
該ストリングを選択的に引張ることにより、該側枝管腔のプロファイルを選択的に増加させ、選択的に減少させるための機構と
を備える、ステント装填カテーテルアセンブリ。 - 前記ストリングの前記両端のそれぞれは、前記カテーテル内の別個の管腔を通って延在し、前記中間部分は、前記少なくとも1つの側枝管腔の前記遠位端の前記尖端を通って織り込まれる、請求項1に記載のステント装填カテーテルアセンブリ。
- 前記主要管腔の遠位端の尖端に係合するピンアセンブリをさらに備え、該ピンアセンブリは、ばね荷重が掛けられ、該ばね荷重の解放時に、該ピンアセンブリは、該尖端を解放する、請求項1に記載のステント装填カテーテルアセンブリ。
- 前記カテーテルの本体内に延在する管腔をさらに備え、該管腔は、流体を受容するポートと、該ポートから該流体の漏出を防ぐための該ポートの遠位かつ該カテーテルの本体内に少なくとも1つのガスケットを備え、該カテーテルの少なくとも一部分は、それを通る該流体の通過によって洗浄される、請求項1に記載のステント装填カテーテルアセンブリ。
- カテーテルの血管内送達に適合されたシースをさらに備え、該シースは、
該シースの壁内に埋め込まれ、該シースの長さに沿って延在する編組材料であって、該壁内に埋め込まれた該編組材料は、該シースにねじれ耐性および高いトルク能力を提供する、編組材料と、
該編組材料内の少なくとも1つのはんだ接合と
を備える、請求項1に記載のステント装填カテーテルアセンブリ。 - 前記編組材料の長さに沿って間隔が空いている、複数のはんだ接合を備える、請求項5に記載のステント装填カテーテルアセンブリ。
- 少なくとも1つの管腔および少なくとも1つの放射線不透過性マーキングを有するカテーテルシースをさらに備え、
前記ステントデバイスは、少なくとも1つの選択的に配置される放射線不透過性マーキングをさらに有し、該ステントデバイス上の該放射線不透過性マーキングを該カテーテルシース上の該放射線不透過性マーキングと整列させることは、該カテーテルシース内での該ステントデバイスの適切な装填を確認し、
該カテーテルシースは、その長さに沿って延在し、かつ、互いから180°離れている2つの放射線不透過性マーキングを有し、該ステントデバイスは、その長さに沿って延在し、かつ、互いから180°離れている2つの放射線不透過性マーキングを有する、請求項1に記載のステント装填カテーテルアセンブリ。 - 前記ステントデバイスは、ステントと、該ステントに係合されるグラフトとを備え、該ステントデバイス上の前記少なくとも1つの放射線不透過性マーキングは、該グラフト上にある、請求項7に記載のステント装填カテーテルアセンブリ。
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