JP2022000145A - 二重チャネル血栓除去装置 - Google Patents
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Abstract
【解決手段】血管から血塊を除去するための装置は、内側拡張可能部材が外側拡張可能部材内に延びるという二層を有することができる。内側拡張可能部材は、1つ以上のセクションに分割することができる。近位側セクションは、血塊挟持構造体を有し、この構造体は、血塊を挟持構造体と外側カテーテルとの間に挟持するように構成されている。内側部材の遠位側流路セクションは、血塊を通る流路を形成して、下流の血管系への血流を再建するように構成され得る。外側拡張可能部材のストラットは、近位部分において完全に円周方向ではない閉鎖セルを形成することができる。それにより、血塊が挟持構造体内を通過し、かつ挟持構造体と係合することが可能になる。また、遠位部分では完全に円周方向であり、血塊を除去するために血管をスキャフォールドすることができる。装置の遠位端にある保護要素は、血塊断片の漏出を防止することができる。
【選択図】図1
Description
(1) 血管から血塊を除去するための装置であって、
近位端、遠位端、及び長手方向軸線を有する細長い内側本体を形成するストラットの枠組みであって、前記細長い内側本体が、
拘束された送達構成、拡張された血塊係合展開構成、及び少なくとも部分的に拘束された血塊挟持構成を有し、前記展開構成から前記血塊挟持構成に移行して、前記血塊を挟持するように構成されている、血塊挟持構造体、及び
前記血塊挟持構造体の前記遠位端に接続された多孔質内側チャネルであって、前記血塊を通って管腔を形成し、展開されると血流を回復させるように構成された管状本体を含む、多孔質内側チャネル、
を備える、枠組みと、
拡張可能な管状外側ケージを形成するストラットの枠組みであって、前記外側ケージが径方向に、前記細長い内側本体よりも大きく拡張可能で、前記外側ケージと前記細長い内側本体との間に受容空間を画定し、前記外側ケージが、
複数の非円周方向閉鎖セルを含む1つ以上の近位側拡張可能体を含む第1のスキャフォールドセグメントであって、前記血塊挟持構造体が前記第1のスキャフォールドセグメントの内部に延在する、第1のスキャフォールドセグメント、及び
前記第1のスキャフォールドセグメントの遠位側にある、複数の完全に円周方向の閉鎖セルを含む1つ以上の遠位側拡張可能体を含む第2のスキャフォールドセグメントであって、前記多孔質内側チャネルが前記第2のスキャフォールドセグメントの内部に延在する、第2のスキャフォールドセグメント、
を備える、枠組みと
を備える、装置。
(2) 前記多孔質内側チャネルの前記ストラットが内側本体閉鎖セルを画定し、
前記外側ケージの前記第1のスキャフォールドセグメント及び前記第2のスキャフォールドセグメントの前記閉鎖セルが、前記内側本体閉鎖セルよりも大きい、
実施態様1に記載の装置。
(3) 前記多孔質内側チャネルの少なくとも一部分が、前記展開構成になるように径方向に拡張可能な場合に、前記血塊と相互貫入するように構成されている、実施態様1に記載の装置。
(4) 前記第1のスキャフォールドセグメントの前記非円周方向閉鎖セルが、1本以上の支持アームを含み、
前記支持アームが前記長手方向軸線の周りに離間配置され、隣接するアームどうしの間に大きな円周方向間隙が存在するようになっている、
実施態様3に記載の装置。
(5) 前記第1のスキャフォールドセグメントが、前記長手方向軸線を中心にして、実質的に直径方向に対向する2本の支持アームを含む、実施態様1に記載の装置。
(7) 前記血塊挟持構造体が複数の隣接するセグメントを含み、
前記セグメントが、少なくとも2つの隣接するセグメントから加えられる径方向の力が互いに異なるように構成されている、実施態様1に記載の装置。
(8) 前記血塊挟持構造体が、
複数の血塊受容セルと、
クラウンどうしの間に延在するストラットを備えるセルであって、前記ストラットは、前記血塊挟持構造体が、前記拡張された展開構成から前記少なくとも部分的に拘束された血塊挟持構成に移行するにつれて、前記セル内に位置する血塊を挟持するように構成されている、セルと、
を備える、実施態様1に記載の装置。
(9) 前記血塊挟持構成が、カテーテルを、前記カテーテルの前記先端と前記血塊挟持構造体の前記ストラットの少なくとも一部分との間で前記血塊の少なくとも一部が圧縮されるまで、前記第1のスキャフォールドセグメント及び前記血塊挟持構造体を越えて前進させることによって実現される、実施態様1に記載の装置。
(10) 前記第1のスキャフォールドセグメント及び前記第2のスキャフォールドセグメントの隣接する拡張可能体どうしが、互いにヒンジにより接続されている、実施態様1に記載の装置。
内側の細長い本体であって、
拘束された送達構成、拡張された血塊係合展開構成、及び少なくとも部分的に拘束された血塊挟持構成を有する、近位側血塊係合要素、及び
前記血塊係合要素の遠位端に接続され、かつ拘束された送達構成及び拡張された展開構成を有する遠位側管状内側チャネルであって、前記内側チャネルは、前記拡張された展開構成において、血液が前記内側チャネルの内部を通って流れるのを可能にするように構成されている、遠位側管状内側チャネル
を備える、内側の細長い本体と、
非円周方向近位側セグメント、及び前記近位側セグメントに枢動可能に接続された完全に円周方向の遠位側セグメントを備える多孔質外側本体であって、前記外側本体が径方向に、前記内側の細長い本体よりも大きく拡張可能である、多孔質外側本体と、
を備え、
前記血塊係合要素が、前記展開構成に拡張されたときに、前記血塊に径方向外向きの力を加えるように構成されたストラットの枠組みを更に含み、前記外向きの力が、前記血塊係合要素の長さに沿って概ね正弦波状の波形パターンで変化する、
装置。
(12) 前記波形パターンの振幅が、前記血塊係合要素の長さに沿って概ね等しい、実施態様11に記載の装置。
(13) 前記波形パターンの振幅が、前記血塊係合要素の近位端においてより高く、前記血塊係合要素の遠位端においてより低くなるように、前記血塊係合要素の長さに沿って減少する、実施態様11に記載の装置。
(14) 前記装置が、前記血塊係合要素及び前記管状内側チャネルを通って延在する長手方向軸線(8)を有し、
前記血塊係合要素の前記ストラットが、前記長手方向軸線の周りに螺旋状の構成で配設された平面パターンを形成する、実施態様11に記載の装置。
(15) 前記血塊係合要素が、複数の隣接するセグメントを更に備え、
少なくとも2つの隣接するセグメントによって加えられる径方向の力が互いに異なる、
実施態様11に記載の装置。
前記屈曲部は、前記血塊係合要素が前記血塊挟持構成に移行されるにつれて、隣接するストラットに前記血塊を圧縮させるように構成されている、
実施態様11に記載の装置。
(17) 前記外側本体の前記近位側セグメント及び前記遠位側セグメントはそれぞれ、1つ以上の拡張可能体を含み、
前記拡張可能体は、閉鎖セルの形態の複数のストラットを備える、
実施態様11に記載の装置。
(18) 前記近位側セグメント及び前記遠位側セグメントの拡張可能体の各々が、隣接する閉鎖セルへの接続を含まない少なくとも1つの遠位側頂点を含む、実施態様17に記載の装置。
(19) 血管を閉塞する血塊を有する患者を治療する方法であって、
管状本体と、その遠位端にあるカラーとを備える外側カテーテルを提供する工程と、
折り畳まれた送達構成と、拡張された展開構成と、細長いシャフトと、前記細長いシャフトの遠位側の拡張可能要素と、を備える血塊回収装置を提供する工程であって、前記拡張可能要素が、
近位側挟持要素、及び前記挟持要素の遠位側に接続された流路要素を備える内側本体と、
長手方向軸線に沿って延在する外側本体であって、非円周方向の第1のスキャフォールドセクション、及び前記第1のスキャフォールドセクションの遠位側に枢動可能に接続された完全に円周方向の第2のスキャフォールドセクションを備える、外側本体と、
を備える、工程と、
前記折り畳まれた構成の前記血塊回収装置を、マイクロカテーテルを通して、閉塞された前記血管に送達する工程と、
前記血塊回収装置を展開して、前記血塊の少なくとも一部に、前記非円周方向の第1のスキャフォールドセクションの円周方向間隙を半径方向に通過させ、前記挟持要素の少なくとも一部と接触させる工程と、
前記血塊回収装置の位置を厳格に維持しつつ、前記外側カテーテルを前記細長いシャフトに沿って前進させて、前記外側カテーテルの前記カラーを前記拡張可能要素と係合させて、前記血塊の少なくとも一部を前記挟持要素で圧迫して挟持させる工程と、
前記カラーと前記拡張可能要素との間の係合を維持しながら、前記外側カテーテル及び前記血塊回収装置を一斉に前記血管から抜去する工程と、
前記血塊回収装置及び挟持された前記血塊を前記患者から除去する工程と、
を含む、方法。
(20) 前記血塊の前記流路要素への移動を阻害して、前記拡張された展開構成において前記流路要素を通る血液の流れを可能にすることを更に含む、実施態様19に記載の方法。
Claims (18)
- 血管から血塊を除去するための装置であって、
近位端、遠位端、及び長手方向軸線を有する細長い内側本体を形成するストラットの枠組みであって、前記細長い内側本体が、
拘束された送達構成、拡張された血塊係合展開構成、及び少なくとも部分的に拘束された血塊挟持構成を有し、前記展開構成から前記血塊挟持構成に移行して、前記血塊を挟持するように構成されている、血塊挟持構造体、及び
前記血塊挟持構造体の前記遠位端に接続された多孔質内側チャネルであって、前記血塊を通って管腔を形成し、展開されると血流を回復させるように構成された管状本体を含む、多孔質内側チャネル、
を備える、枠組みと、
拡張可能な管状外側ケージを形成するストラットの枠組みであって、前記外側ケージが径方向に、前記細長い内側本体よりも大きく拡張可能で、前記外側ケージと前記細長い内側本体との間に受容空間を画定し、前記外側ケージが、
複数の非円周方向閉鎖セルを含む1つ以上の近位側拡張可能体を含む第1のスキャフォールドセグメントであって、前記血塊挟持構造体が前記第1のスキャフォールドセグメントの内部に延在する、第1のスキャフォールドセグメント、及び
前記第1のスキャフォールドセグメントの遠位側にある、複数の完全に円周方向の閉鎖セルを含む1つ以上の遠位側拡張可能体を含む第2のスキャフォールドセグメントであって、前記多孔質内側チャネルが前記第2のスキャフォールドセグメントの内部に延在する、第2のスキャフォールドセグメント、
を備える、枠組みと
を備える、装置。 - 前記多孔質内側チャネルの前記ストラットが内側本体閉鎖セルを画定し、
前記外側ケージの前記第1のスキャフォールドセグメント及び前記第2のスキャフォールドセグメントの前記閉鎖セルが、前記内側本体閉鎖セルよりも大きい、
請求項1に記載の装置。 - 前記多孔質内側チャネルの少なくとも一部分が、前記展開構成になるように径方向に拡張可能な場合に、前記血塊と相互貫入するように構成されている、請求項1に記載の装置。
- 前記第1のスキャフォールドセグメントの前記非円周方向閉鎖セルが、1本以上の支持アームを含み、
前記支持アームが前記長手方向軸線の周りに離間配置され、隣接するアームどうしの間に大きな円周方向間隙が存在するようになっている、
請求項3に記載の装置。 - 前記第1のスキャフォールドセグメントが、前記長手方向軸線を中心にして、実質的に直径方向に対向する2本の支持アームを含む、請求項1に記載の装置。
- 前記第1のスキャフォールドセグメント及び前記第2のスキャフォールドセグメントの拡張可能体の各々が、隣接する閉鎖セルへの接続を含まない少なくとも1つの遠位側頂点を含む、請求項1に記載の装置。
- 前記血塊挟持構造体が複数の隣接するセグメントを含み、
前記セグメントが、少なくとも2つの隣接するセグメントから加えられる径方向の力が互いに異なるように構成されている、請求項1に記載の装置。 - 前記血塊挟持構造体が、
複数の血塊受容セルと、
クラウンどうしの間に延在するストラットを備えるセルであって、前記ストラットは、前記血塊挟持構造体が、前記拡張された展開構成から前記少なくとも部分的に拘束された血塊挟持構成に移行するにつれて、前記セル内に位置する血塊を挟持するように構成されている、セルと、
を備える、請求項1に記載の装置。 - 前記血塊挟持構成が、カテーテルを、前記カテーテルの前記先端と前記血塊挟持構造体の前記ストラットの少なくとも一部分との間で前記血塊の少なくとも一部が圧縮されるまで、前記第1のスキャフォールドセグメント及び前記血塊挟持構造体を越えて前進させることによって実現される、請求項1に記載の装置。
- 前記第1のスキャフォールドセグメント及び前記第2のスキャフォールドセグメントの隣接する拡張可能体どうしが、互いにヒンジにより接続されている、請求項1に記載の装置。
- 血管から閉塞性血塊を除去するための血塊回収装置であって、
内側の細長い本体であって、
拘束された送達構成、拡張された血塊係合展開構成、及び少なくとも部分的に拘束された血塊挟持構成を有する、近位側血塊係合要素、及び
前記血塊係合要素の遠位端に接続され、かつ拘束された送達構成及び拡張された展開構成を有する遠位側管状内側チャネルであって、前記内側チャネルは、前記拡張された展開構成において、血液が前記内側チャネルの内部を通って流れるのを可能にするように構成されている、遠位側管状内側チャネル
を備える、内側の細長い本体と、
非円周方向近位側セグメント、及び前記近位側セグメントに枢動可能に接続された完全に円周方向の遠位側セグメントを備える多孔質外側本体であって、前記外側本体が径方向に、前記内側の細長い本体よりも大きく拡張可能である、多孔質外側本体と、
を備え、
前記血塊係合要素が、前記展開構成に拡張されたときに、前記血塊に径方向外向きの力を加えるように構成されたストラットの枠組みを更に含み、前記外向きの力が、前記血塊係合要素の長さに沿って概ね正弦波状の波形パターンで変化する、
装置。 - 前記波形パターンの振幅が、前記血塊係合要素の長さに沿って概ね等しい、請求項11に記載の装置。
- 前記波形パターンの振幅が、前記血塊係合要素の近位端においてより高く、前記血塊係合要素の遠位端においてより低くなるように、前記血塊係合要素の長さに沿って減少する、請求項11に記載の装置。
- 前記装置が、前記血塊係合要素及び前記管状内側チャネルを通って延在する長手方向軸線(8)を有し、
前記血塊係合要素の前記ストラットが、前記長手方向軸線の周りに螺旋状の構成で配設された平面パターンを形成する、請求項11に記載の装置。 - 前記血塊係合要素が、複数の隣接するセグメントを更に備え、
少なくとも2つの隣接するセグメントによって加えられる径方向の力が互いに異なる、
請求項11に記載の装置。 - 前記血塊係合要素の隣接するストラットが少なくとも1つの屈曲部を含み、
前記屈曲部は、前記血塊係合要素が前記血塊挟持構成に移行されるにつれて、隣接するストラットに前記血塊を圧縮させるように構成されている、
請求項11に記載の装置。 - 前記外側本体の前記近位側セグメント及び前記遠位側セグメントはそれぞれ、1つ以上の拡張可能体を含み、
前記拡張可能体は、閉鎖セルの形態の複数のストラットを備える、
請求項11に記載の装置。 - 前記近位側セグメント及び前記遠位側セグメントの拡張可能体の各々が、隣接する閉鎖セルへの接続を含まない少なくとも1つの遠位側頂点を含む、請求項17に記載の装置。
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