JP5457373B2 - 血流回復のための装置 - Google Patents
血流回復のための装置 Download PDFInfo
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- JP5457373B2 JP5457373B2 JP2010547816A JP2010547816A JP5457373B2 JP 5457373 B2 JP5457373 B2 JP 5457373B2 JP 2010547816 A JP2010547816 A JP 2010547816A JP 2010547816 A JP2010547816 A JP 2010547816A JP 5457373 B2 JP5457373 B2 JP 5457373B2
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2215—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having an open distal end
-
- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- 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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/92—Stents in the form of a rolled-up sheet expanding after insertion into the vessel, e.g. with a spiral shape in cross-section
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Description
(項目1)血栓で閉塞された血管部位における局所血流を回復させる方法であって、上記方法は、
上記血栓に径方向に隣接する部位に、自動展開式装置を送り込む工程、および
上記装置を展開し、それによって血流を回復させる工程
を包含し、
上記装置は、
第1の複数のメッシュセルを含むメッシュ構造であって、上記メッシュ構造は、近端および遠端を有する、メッシュ構造と、
第2の複数のメッシュセルを含む先細り部分であって、上記先細り部分は、上記メッシュ構造の近端に向けて配置される、先細り部分と、
上記先細り部分が収斂する、上記先細り部分の近端に配置された、連結点と
を備え、上記装置は、体積拡大形態をとるようにあらかじめ形成され、上記体積拡大形態において上記連結点に向けて先細りになる、軸方向開放管の形態をとる、
方法。
(項目2)血管内に張り付いた血栓をある程度または実質的に溶解させる方法であって、上記方法は、
上記血栓に径方向に隣接する部位に、自動展開式装置を送り込む工程、および
上記装置を展開し、それによって上記血管を通る血液を増大させる工程
を包含し、上記増大した血流はある程度または実質的に上記血栓を溶解させ、
上記装置は、
第1の複数のメッシュセルを含むメッシュ構造であって、上記メッシュ構造は、近端および遠端を有する、メッシュ構造と、
第2の複数のメッシュセルを含む先細り部分であって、上記先細り部分は、上記メッシュ構造の近端に向けて配置される、先細り部分と、
上記先細り部分が収斂する、上記先細り部分の近端に配置された、連結点と
を備え、上記装置は、体積拡大形態をとるようにあらかじめ形成され、上記体積拡大形態において上記連結点に向けて先細りになる、軸方向開放管の形態をとる、
方法。
(項目3)
血管内に張り付いた血栓を引剥がす方法であって、上記方法は、
上記血栓に径方向に隣接する部位に、自動展開式装置を送り込む工程、
上記装置を、上記血栓の少なくとも一部分に絡み付くように展開する工程、および
上記装置を、近位に、または遠位に動かして、上記血栓を引剥がす工程
を包含し、
上記装置は、
第1の複数のメッシュセルを含むメッシュ構造であって、上記メッシュ構造は、近端および遠端を有する、メッシュ構造と、
第2の複数のメッシュセルを含む先細り部分であって、上記先細り部分は、上記メッシュ構造の近端に向けて配置される、先細り部分と、
上記先細り部分が収斂する、上記先細り部分の近端に配置された、連結点と
を備え、上記装置は、体積拡大形態をとるようにあらかじめ形成され、上記体積拡大形態において上記連結点に向けて先細りになる、軸方向開放管の形態をとる、
方法。
(項目4)上記装置が、可逆自動展開式である、上記項目のいずれか1項に記載の方法。
(項目5)上記装置が、近端および遠端を有する送り込みデバイスによって送り込まれる、上記項目のいずれか1項に記載の方法。
(項目6)上記装置が、上記送り込みデバイス内に含まれている間は展開されない、項目5に記載の方法。
(項目7)上記装置が、上記送り込みデバイスを近位に、かつ/または上記装置を遠位に動かすことによって、展開される、項目6に記載の方法。
(項目8)上記連結点は押出ワイヤに固定される、上記項目のいずれか1項に記載の方法。
(項目9)上記装置は、上記押出ワイヤを遠位に動かすことによって展開され得る、項目8に記載の方法。
(項目10)上記送り込みデバイスは、上記血栓に径方向に隣接するように配置される、項目5に記載の方法。
(項目11)上記送り込みデバイスの遠端は、上記血栓に対して遠位にある、項目10に記載の方法。
(項目12)上記送り込みデバイスは近位に動かされ、それによって上記装置が上記血栓に径方向に隣接するように上記装置が展開される、項目9に記載の方法。
(項目13)上記血栓に、有効量の血塊退治薬剤を送り込む工程をさらに包含する、上記項目のいずれか1項に記載の方法。
(項目14)項目3に記載の方法であって、さらに上記血栓を上記血管から除去する工程を包含する、項目3に記載の方法。
(項目15)上記自動展開式装置は、上記血栓に対して遠位に送り込まれる、項目14に記載の方法。
(項目16)上記メッシュ構造の遠端は、上記血栓の少なくとも一部分に絡みつき、除去可能な、一体化された装置−血栓複合体を形成するように構成されている、項目15に記載の方法。
(項目17)上記除去可能な、一体化された装置−血栓複合体は、上記血管を通して近位に動かされる、項目16に記載の方法。
(項目18)上記除去可能な、一体化された装置−血栓複合体は、上記血管から引き出される、項目17に記載の方法。
(項目19)上記装置は、上記血管における血流を回復させるのに十分な時間、展開される、上記項目のいずれか1項に記載の方法。
(項目20)血栓で閉塞された血管における血流の回復の撮像のための方法であって、該方法は、
a)血栓に径方向に隣接して配置された自動展開式装置の画像を取り込む工程、及び
b)上記装置の展開、およびそれによる血流の回復の画像を取り込む工程
を包含する、方法。
(項目21)血管内に張り付いた血栓の引剥しの撮像のための方法であって、該方法は、
a)血栓に径方向に隣接して配置された自動展開式装置の画像を取り込む工程、及び
b)上記装置の展開、およびそれによる上記血管を通る血液の増大の画像を取り込む工程
を包含し、増大した血流が、ある程度または実質的に上記血栓を溶解させる、方法。
(項目22)血管内に張り付いた血栓の引剥がしの撮像のための方法であって、該方法は、
a)血栓に径方向に隣接して配置された自動展開式装置の画像を取り込む工程、
b)上記装置の展開、およびそれによる上記血栓の少なくとも一部分への絡み付きの画像を取り込む工程、および
c)上記装置の遠位または近位への移動、およびそれによる上記血栓の引剥がしの画像を取り込む工程
を包含する、方法。
(項目23)
血管内の血栓の除去のための自動展開式装置において、
第1の複数のメッシュセルを有するメッシュ構造であって、上記メッシュ構造が近端及
び遠端を有し、上記メッシュ構造の上記遠端が上記血栓の少なくとも一部分に絡み付いて
除去可能な一体化された装置−血栓複合体を形成するように構成された、メッシュ構造、
第2の複数のメッシュ構造を有する先細り部分であって、上記先細り部分が上記メッシ
ュ構造の上記近端に向けて配置される、先細り部分、及び
上記先細り部分が収斂する、上記先細り部分の近端に配置された、連結点、
を有し、
上記装置が、体積拡大形態をとるようにあらかじめ形成され、上記体積拡大形態におい
て上記連結点に向けて先細りになる、軸方向開放管の形態をとる、
ことを特徴とする装置。
(項目24)
上記メッシュ構造の上記遠端がコイルまたはアイレットの形状をもつX線不透過性マー
カーを有することを特徴とする項目23に記載の装置。
(項目25)
上記メッシュ構造の上記遠端が、上記体積拡大形態において上記体積拡大形態における
上記メッシュ構造の上記近端より大きな直径を有することを特徴とする項目23に記載の
装置。
(項目26)
上記メッシュ構造の上記遠端が第3の複数のメッシュセルを有し、上記第3の複数のメ
ッシュセルが上記第2の複数のメッシュセルより小さいセル寸法を有することを特徴とす
る項目23に記載の装置。
(項目27)
上記メッシュ構造の上記遠端が1つ以上のペグ及び/またはフックを有することを特徴
とする項目23に記載の装置。
(項目28)
上記メッシュ構造の上記遠端がファイバを有することを特徴とする項目23に記載の装
置。
(項目29)
上記メッシュ構造の上記遠端が強められた径方向力を与えるに十分な時間加熱されるこ
とを特徴とする項目23に記載の装置。
(項目30)
上記メッシュ構造が抗血液凝固性または抗血小板性の薬剤でコーティングされることを
特徴とする項目23に記載の装置。
(項目31)
上記メッシュ構造がさらに生分解性/生体適合性の高分子材でコーティングされて上記
抗血液凝固性または抗血小板性の薬剤の徐放を提供することを特徴とする項目30に記載
の装置。
(項目33)
上記メッシュ構造が抗血液凝固性または抗血小板性の薬剤を保持するための貯槽を有す
ることを特徴とする項目23に記載の装置。
(項目11)
装置に少なくともある程度絡み付かれた血栓を含む、除去可能な一体化された装置−血
栓複合体において、上記装置が、
第1の複数のメッシュセルを有するメッシュ構造であって、上記メッシュ構造が近端及
び遠端を有し、上記メッシュ構造の上記遠端が上記血栓の少なくとも一部分に絡み付いて
除去可能な一体化された装置−血栓複合体を形成するように構成された、メッシュ構造、
第2の複数のメッシュ構造を有する先細り部分であって、上記先細り部分が上記メッシ
ュ構造の上記近端に向けて配置される、先細り部分、及び
上記先細り部分が収斂する、上記先細り部分の近端に配置された、連結点、
を有し、
上記装置が、体積拡大形態をとるようにあらかじめ形成され、上記体積拡大形態におい
て上記連結点に向けて先細りになる、軸方向開放管の形態をとる、
ことを特徴とする装置−血栓複合体。
本明細書に組み込まれて本明細書の一部をなす添付図面は、本発明の例示的実施形態を
示し、上で与えられた全般的説明及び以下に与えられる詳細な説明とともに本発明の特徴
の説明に役立つ。
発明は閉塞された血管部位に局所血流を回復させる方法に向けられる。血管部位、すなわち血管は、血栓によって閉塞され得る。本発明の方法に用いられる装置は、マイクロカテーテル及び、必要に応じて、誘導カテーテルにより、血管部位に配置することができる。本発明の方法は完全に引戻し可能な装置を用いることができ、これは方法が永久的に患者に埋め込まれる装置を必要とする技術に優る改善である。装置が永久的に患者に埋め込まれる場合、患者には生涯続く抗血液凝固治療が必要となる。したがって、引き戻し可能な装置を用いることで、生涯続く抗血液凝固治療を回避できると考えられる。
X線不透過性マイクロカテーテル遠位マーカー17をX線不透過性遠位セグメント近端マーカー18にまたはその近傍に残すことができ、あるいは患者から完全に取り出すことができる;
遠位セグメント1に対するあらかじめ定められた位置までマイクロカテーテル8を前進させることができ、これは、X線不透過性マイクロカテーテル遠位マーカー17がX線不透過性遠位セグメント近端マーカー18と所望通りに位置合せされた場合、X線不透過性マイクロカテーテル遠位マーカー17がX線不透過性遠位セグメント近端マーカー18の遠端と所望通りに、例えば約0.5mmから約10mmまたは約5mmから約10mmの範囲で、位置合せされた場合、マイクロカテーテル8の座屈によって明らかになるようにマイクロカテーテル8の前進に対してかなりの抵抗を受けた場合の、所望の位置合わせまたはかなりの抵抗のいずれが初めにおころうとも、その場合とすることができる。展開されて非拘束状態13にある遠位セグメント1を誘導カテーテルに向けてまたは誘導カテーテル内に移動させている間、以下のいずれかがおこり得る:
誘導カテーテル内腔近端が加圧バッグまたはその他の陽圧流体源と通じる;または
誘導カテーテル内腔近端が吸引源またはその他の陰圧源と通じる。
(A・P)+C・f
で表すことができる。
(a・p)+c・f
で表すことができ、既知の方法による元の血栓12の引剥し及び可動化に必要な力よりもかなり小さくなるであろう(図5)。
上述したように、本発明の方法によっていずれか適する自動展開式装置を用いることができる。装置の様々な実施形態を米国特許第7300458号明細書に見ることができる。この明細書はその全体が本明細書に参照として含まれる。
本発明では抗血液凝固性及び/または抗血小板性の薬剤で装置をコーティングすることも考えられる。薬剤は単独でまたは別の薬剤と組み合わせて用いることができると考えられる。
4-カルボン酸のようなP-セレクチン阻害薬、及び、アセチルサリチル酸(アスピリン(登録商標))、レスベラトール、イブプロフェン(Advil(登録商標),Motrin(登録商標))、ナプロキセン(Aleve(登録商標),Naprosyn(登録商標))、スリンダク(Clinoril(登録商標))、インドメタシン(Indocin(登録商標))、メフェナム酸、ドロキシカム、ジクロフェナク(Cataflam(登録商標),Voltaren(登録商標))、スルフィンピラゾン(Anturane(登録商標))及びピロキシカム(Feldene(登録商標))のような非ステロイド性抗炎症薬(NSAIDS)を含む、それぞれの作用に基づく、抗血小板剤のいくつかの種別がある。NSAIDSの中では、アセチルサリチル酸(ASA)、レスベラトール及びピロキシカムが好ましい。アスピリン及びイブプロフェンのようないくつかのNSAIDSは、シクロオキシゲナーゼ-1(cox-1)及びシクロオキシゲナーゼ-2(cox-2)のいずれをも阻害する。cox-2を弱くしか阻害しない可逆的cox-1阻害薬である、レスベラトールのようないくつかのNSAIDSは、cox-1を選択的に阻害する。
2 遠位セグメント遠端
3 遠位セグメント近端
4 本体部分
5 重畳構造
6 体積縮小形態
7 押出ワイア
8 マイクロカテーテル
9 連結点
10 取付機構
11 大脳動脈
12,12' 血栓
13 非拘束状態
14 血流
15 X線不透過性遠位セグメント遠端マーカー
16 マイクロカテーテル遠位先端
17 X線不透過性マイクロカテーテル遠位マーカー
18 X線不透過性遠位セグメント近端マーカー
19 引張力
Claims (18)
- 血管内の血栓の除去のための自動展開式装置であって、
該装置は、近端および遠端を有する管状構造を含み、該構造は、第1の複数のセルを含む遠位部分と、第2の複数のセルを含む近位部分とを含み、
該第2の複数のセルのメッシュ寸法は、該第1の複数のセルのメッシュ寸法よりも大きく、
該装置はさらに、該近位部分の近端に配置された連結点を含み、該近位部分は該連結点において収斂し、
該装置はさらに、該構造の長手方向軸に平行に延びる2つの縁端を含み、
該構造は、インプラントの場所においては展開構成をとるように構成されており、そして、該構造は、マイクロカテーテル内への挿入のために体積縮小構成へ改変されるように構成されており、
該体積縮小構成は、該展開構成よりも小さな断面積を有し、
該2つの縁端は、該体積縮小構成においては重なっており、
該構造は、該体積縮小構成から該展開構成への移行のときに該血栓内に展開するように構成されており、
該遠位部分は、該第1の複数のセルに対して遠位の第3の複数のセルをさらに含み、該第3の複数のセルは、該第1の複数のセルのメッシュ寸法よりも小さいメッシュ寸法を有し、該構造の該遠端は、コイルまたはアイレットの形状をもつX線不透過性マーカーを有する
ことを特徴とする装置。 - 前記構造の前記遠端が、体積拡大形態において、該体積拡大形態における該構造の前記近端より大きな直径を有することを特徴とする請求項1に記載の装置。
- 前記構造の前記遠端が1つ以上のペグ及び/またはフックを有することを特徴とする請求項1に記載の装置。
- 前記構造の前記遠端がファイバを有することを特徴とする請求項1に記載の装置。
- 前記構造の前記遠端が、強められた径方向力を与えるに十分な時間加熱されることを特徴とする請求項1に記載の装置。
- 前記構造が抗血液凝固性または抗血小板性の薬剤でコーティングされることを特徴とする請求項1に記載の装置。
- 前記構造がさらに生分解性/生体適合性の高分子材でコーティングされて前記抗血液凝固性または抗血小板性の薬剤の徐放を提供することを特徴とする請求項6に記載の装置。
- 前記構造が抗血液凝固性または抗血小板性の薬剤を保持するための貯槽を有することを特徴とする請求項1に記載の装置。
- 装置に少なくともある程度絡み付かれた血栓を含む、除去可能な一体化された装置−血栓複合体であって、
該装置が、近端および遠端を有する構造を含み、該構造は、第1の複数のセルを含む遠位部分と、第2の複数のセルを含む近位部分とを含み、
該第2の複数のセルのメッシュ寸法は、該第1の複数のセルのメッシュ寸法よりも大きく、
該装置はさらに、該近位部分の近端に配置された連結点を含み、該近位部分は該連結点において収斂し、
該装置はさらに、該構造の長手方向軸に平行に延びる2つの縁端を含み、
該構造は、インプラントの場所においては展開構成をとるように予め形成されており、該構造は、該展開構成のときは、管状で、長手方向に沿って延び、そして該構造は、マイクロカテーテル内への挿入のために体積縮小構成へ改変されるように構成されており、
該体積縮小構成は、該展開構成よりも小さな断面積を有し、
該2つの縁端は、該体積縮小構成においては重なっており、
該構造は、該体積縮小構成から該展開構成への移行のときに該血栓内に展開するように構成されており、
該遠位部分は、該第1の複数のセルに対して遠位の第3の複数のセルをさらに含み、該第3の複数のセルは、該第1の複数のセルのメッシュ寸法よりも小さいメッシュ寸法を有し、該構造の該遠端は、コイルまたはアイレットの形状をもつX線不透過性マーカーを有する
ことを特徴とする装置−血栓複合体。 - 血管内における血栓の除去のための自動展開式装置であって、
該装置は、該血栓内へと展開して、該血栓を取り出すための手段を備え、
該手段は、近端および遠端を有する構造を含み、該構造は、第1の複数のセルを含む遠位部分と、第2の複数のセルを含む近位部分とを有し、
該第2の複数のセルのメッシュ寸法は、該第1の複数のセルのメッシュ寸法よりも大きく、
該装置はさらに、該近位部分の近端に配置された連結点を含み、該近位部分は該連結点において収斂し、
該装置はさらに、該構造の長手方向軸に平行に延びる2つの縁端を含み、
該構造は、インプラントの場所においては展開構成をとるように予め形成されており、該構造は、該展開構成のときは、管状で、長手方向に沿って延び、そして、該構造は、マイクロカテーテル内への挿入のために体積縮小構成へ改変されるように構成されており、
該体積縮小構成は、該展開構成よりも小さな断面積を有し、
該2つの縁端は、該体積縮小構成のときには、該構造が少なくとも1つの径方向において多層を有するように、該体積縮小構成においては重なっており、
該遠位部分は、該第1の複数のセルに対して遠位の第3の複数のセルをさらに含み、該第3の複数のセルは、該第1の複数のセルのメッシュ寸法よりも小さいメッシュ寸法を有し、該構造の該遠端は、コイルまたはアイレットの形状をもつX線不透過性マーカーを有する
ことを特徴とする装置。 - 動脈内の血栓の処置および動脈内からの血栓の除去のための展開式デバイスであって、
該デバイスは、近端および遠端を有する構造を含み、該構造は、第1の複数のセルを含む遠位部分と、第2の複数のセルを含む近位部分とを有し、
該第2の複数のセルのメッシュ寸法は、該第1の複数のセルのメッシュ寸法よりも大きく、
該デバイスはさらに、該近位部分の近端に配置された連結点を含み、該近位部分は該連結点において収斂し、
該デバイスはさらに、該構造の長手方向軸に平行に延びる2つの縁端を含み、
該構造は、インプラントの場所においては展開構成をとるように構成されており、該構造は、該展開構成のときは、管状で、長手方向に沿って延び、そして、該構造は、マイクロカテーテル内への挿入のために体積縮小構成へ改変されるように構成されており、
該体積縮小構成は、該展開構成よりも小さな断面積を有し、
該2つの縁端は、該体積縮小構成のときには、該構造が少なくとも1つの径方向において多層を有するように、該体積縮小構成においては重なっており、
該構造は、該体積縮小構成から該展開構成への移行のときに該血栓内に展開するように構成されており、
該遠位部分は、該第1の複数のセルに対して遠位の第3の複数のセルをさらに含み、該第3の複数のセルは、該第1の複数のセルのメッシュ寸法よりも小さいメッシュ寸法を有し、該構造の該遠端は、コイルまたはアイレットの形状をもつX線不透過性マーカーを有する
ことを特徴とするデバイス。 - 前記構造の前記遠端が、体積拡大形態において、該体積拡大形態における該構造の前記近端より大きな直径を有することを特徴とする請求項11に記載のデバイス。
- 前記構造の前記遠端が1つ以上のペグ及び/またはフックを有することを特徴とする請求項11に記載のデバイス。
- 前記構造の前記遠端がファイバを有することを特徴とする請求項11に記載のデバイス。
- 前記構造の前記遠端が、強められた径方向力を与えるに十分な時間加熱されることを特徴とする請求項11に記載のデバイス。
- 前記構造が抗血液凝固性または抗血小板性の薬剤でコーティングされることを特徴とする請求項11に記載のデバイス。
- 前記構造がさらに生分解性/生体適合性の高分子材でコーティングされて前記抗血液凝固性または抗血小板性の薬剤の徐放を提供することを特徴とする請求項16に記載のデバイス。
- 前記構造が抗血液凝固性または抗血小板性の薬剤を保持するための貯槽を有することを特徴とする請求項11に記載のデバイス。
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