JP5684239B2 - 軌道および穿刺部閉鎖用の生体材料 - Google Patents
軌道および穿刺部閉鎖用の生体材料 Download PDFInfo
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- JP5684239B2 JP5684239B2 JP2012509890A JP2012509890A JP5684239B2 JP 5684239 B2 JP5684239 B2 JP 5684239B2 JP 2012509890 A JP2012509890 A JP 2012509890A JP 2012509890 A JP2012509890 A JP 2012509890A JP 5684239 B2 JP5684239 B2 JP 5684239B2
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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Description
本特許出願は、2009年5月4日に出願された米国仮特許出願第61/175,220号明細書および2009年12月2日に出願された米国仮特許出願第61/265,977号明細書に対する優先権を主張し、それらは、あらゆる目的で参照により本明細書に援用される。
図1Aは、実質的に乾燥している時は非粘着性であるが、生理溶液(たとえば創傷内の流体または間質液)に晒されると粘着性である、実質的に乾燥している粘着性コーティング104が施された生体材料シート102を示す。シートという用語は、厚さが表面積よりはるかに小さい略平面構造を指す。シート102は矩形として示されているが、他の形状であってもよい。図1Bは、シート102をいかに巻くことができるかの概念図である。図1Cは、完全に巻かれた形態の同じシートの断面図である。したがって、シートを、拘束されない時に真っ直ぐになることによって開くように付勢されるように巻くことができる。
いくつかの前駆体は、開始剤を用いて反応する。開始剤基は、鎖成長(たとえばフリーラジカル)重合反応を開始することができる化学基である。たとえば、それは、別個の成分として存在してもよく、または前駆体におけるペンダント基として存在してもよい。フリーラジカル開始剤基には、熱開始剤、光活性化開始剤および酸化還元(レドックス)系が挙げられる。長波長UVおよび可視光光活性化開始剤には、たとえば、エチルエオシン基、2,2−ジメトキシ−2−フェニルアセトフェノン基、他のアセトフェノン誘導体、チオキサントン基、ベンゾフェノン基およびカンファーキノン基が挙げられる。熱反応開始剤の例には、4,4’アゾビス(4−シアノペンタン酸)基、および過酸化ベンゾイル基の類似体が挙げられる。Wako Chemicals USA、Inc.、Richmond、Va.から入手可能なV−044等、いくつかの市販の低温フリーラジカル開始剤を用いて、上述したモノマーを有するヒドロゲルを形成するように、体温でのフリーラジカル架橋反応を開始することができる。
前駆体は、患者の外部でまたはインサイチュで互いに反応して材料を形成する官能基を有することができる。官能基は、概して、重合のための重合性基を有するか、または求電子剤−求核剤反応において互いと反応するか、または他の重合反応に関与するように構成される。
物体、たとえば裏当て、生体材料または医療装置に層を形成するプロセスは、噴霧により、またはポリマー層を形成するための組成物内に装置を浸漬することにより、装置に組成物を付与することを含むことができる。本明細書で教示する材料を、装置の全体を覆う層、装置の一部を覆う不連続層、および他の層の上の層を含む、医療装置上の層に形成することができる。互いに接触する層を、たとえば層内のポリマー間の共有結合架橋により互いに架橋することができる。
図2Aは、接着剤104の縞を有する生体材料シート102を示す。図2Bは、コーティングの泡状物106を有する生体材料シート102を示す。泡状物は、本明細書では、相対的にはるかに大きくかつ連続した場における堆積物を示すために用いる用語であり、複数の泡状物は、形状が丸いか不規則であるかに関らず、互いに連結されない堆積物、たとえば液滴またはドットである。泡状物の体積の例は0.1〜100μlであり、当業者は、それらの範囲および明示的に述べる範囲内の値のすべてが企図されることをすぐに理解するであろう。図2Cは、複数の縞110を有する生体材料ロッド108を示す。
いくつかの実施形態は、コーティングされた生体材料を含む。多くの生体材料をコーティング用に適合させることができる。コラーゲンは分解性であり、一般に医学界で広く受け入れられており、所望の形状に加工することが可能である。他の天然由来の生体材料には、ゼラチン、ヒアルロン酸、フィブリン、フィブリノゲンおよび多糖類が挙げられる。別法として、上述したように、合成材料(自然には見られず自然にある物質から加工されない)を使用することができる。概して、材料は、応用に適した形状に加工され、それにより、組織部位内に適合し、血管からかつ/または軌道の周囲の組織からの流れを止める等、意図された使用を満足させる。
図5に、コーティングされた材料を使用するシステムの実施形態を示す。図5Aにおいて、医原性経路200は、軌道202と血管206の穿刺部204とを有している。当業者には既知である手段を用いて、バルーン205が、ガイドワイヤまたはより大口径のイントロデューサワイヤ207を介して膨張している。図5Bは、コーティングされていない近位部220および部分的にコーティングされた遠位部222を有するプラグ218を示す。マトリックス前駆体を含むコーティングが、複数の泡状物224として提供されている。プラグは、ガイドワイヤ、中空ワイヤ、カテーテルまたは他の細長い部材の上を通過するための軸方向ボア209を有している。ガイドワイヤは、外径が約0.08インチ未満の中空ワイヤである。中空ワイヤは、内部ボアを有するガイドワイヤまたはより大きいワイヤを指すより広い用語である。図5Cは、プラグ218が装填された付与装置208を示す。付与装置208は、ハンドル216を有する送達シース214によって受け入れられるハンドル212を備えた、プッシャロッド210を有している。シース214にはプラグ218が事前に装填されている。プッシャロッド210は、第1配置位置および第2充填位置を有している。ワイヤ207が、プラグ218および付与装置208を通過する。プッシャロッド210が配置位置にある場合、シース214が軌道202内に導入されてその遠位先端223を隣接した穿刺部204に配置する。プッシャロッド210が固定して保持されるかまたはプラグ218に対して力を加えるように下方に付勢される間、使用者は、ハンドル216を図5Dおよび矢印Dのように上方に引き上げ、遠位先端223を使用者に対して上方に移動させてコーティングされた遠位部222を露出させる。
を含む方法。
溶融4a20kSG(4アーム20,000MWスクリンイミジルグルタレート末端ポリエチレングリコールポリマー)および8a20kアミン(8アーム20,000MWアミン末端ポリエチレングリコールポリマー)(2:1比)を結合して50℃の温度にした。実験者は、溶融ポリマーを含む熱板の上で凍結乾燥されたPEG系ヒドロゲル(両端が巻かれたシート)の両側を簡単に擦りつけた。これを、ポリマーを付与する前に凍結乾燥されたヒドロゲルに対して、反応pHを上昇させ重合を加速させるように、ホウ酸緩衝剤コーティングのありおよびなしで試験した。
MYNXシステムで使用される凍結乾燥されたPEG系ヒドロゲルを、平坦に、広げられた状態で取得した。シートを巻いて、約6インチ長の11Frシースの内腔に配置した。同じ材料第2シートを、約75℃の温度のPEG前駆体の溶解物の上に配置した。溶解物は、1:1の比のメチレンブルーと4a10CM:8a20kアミン(カルボキシメチルヒドロキシ酪酸前駆体で末端化した4アーム10kDaポリエチレングリコール前駆体およびアミンで末端化した8アーム20kDa多官能性PEGである第2前駆体)とであった。シートを取り除き冷却することができ、その時点で、それは片側がコーティングされ粘着性ではなかった。シートは、非常に高い温度に晒されると丸まるかまたは収縮する傾向がある。コーティングは、厚い場合は亀裂を形成する傾向があったが、より薄いコーティングでは亀裂はなかった。コーティングされたシートを巻いてシース内に配置した。図11はこの構成を示す。シース600は、コーティングされていない巻かれたシート602と、隣接する巻かれかつコーティングされたシート604とを収容し、開放されたシースの遠位端608には小さい間隙606があった。
Claims (11)
- 医原性軌道および血管穿刺部の処置装置であって、
付与装置、前記付与装置内に予め装填された近位端と遠位端とを備えるプラグおよび前記付与装置内に予め装填された第1および第2の反応性前駆体を具備し、
前記付与装置が、前記軌道に配置されるような寸法でありかつ遠位開口部および内腔を有する遠位部と、前記内腔によって少なくとも部分的に受け入れられる、前記遠位開口部を通して前記プラグを前記内腔から押し出すプッシャとを備え、
前記プラグが、前記軌道内に配置されるように寸法が決められ、かつ前記内腔内に配置され、
前記第1および第2の反応性前駆体が、前記プラグが前記内腔から追い出される前に前記軌道内に放出されるように、前記内腔の前記プラグの遠位の位置において前記プラグの遠位端に配置され、
前記第1および第2の反応性前駆体が、乾燥状態にあり、前記軌道内に配置された後に生理液と反応して溶解し、血管穿刺部内において前記プラグを固定するマトリックス材料を形成する、装置。 - 前記第1の反応性前駆体が求電子性官能基を含み、前記第2の反応性前駆体が求核性官能基を含み、前記第1および第2の反応性前駆体がともにポリマーである、請求項1に記載の装置。
- 前記プラグがロッド、管、巻かれたシート、ねじれシートまたは編みシートを含む、請求項1に記載の装置。
- 前記プラグが軸方向内腔をさらに備える、請求項1に記載の装置。
- 前記第1および第2の反応性前駆体は、前記軌道内に配置された後に前記生理液内において溶解し、共有結合反応により、前記プラグおよび前記軌道に付着させるマトリックス材料を形成する、請求項1に記載の装置。
- 複数の反応性前駆体を含み、
前記反応性前駆体は、前記軌道内に配置された後に前記生理液内において溶解し、共有結合反応により、前記プラグおよび前記軌道に付着させるマトリックス材料を形成する、請求項1に記載の装置。 - 前記プラグは、多孔性のヒドロゲルを含む、請求項1に記載の装置。
- 前記プラグは、凍結乾燥されたヒドロゲル生体材料を含む、請求項1に記載の装置。
- 前記軌道内において流体にさらされる際に前記第1および第2の反応性前駆体の反応速度を増加させる緩衝剤をさらに含む、請求項1に記載の装置。
- 前記付与装置は、シースを含む、請求項1に記載の装置。
- 前記穿刺部は、大口径穿刺部である、請求項1に記載の装置。
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JP2015119979A (ja) | 2015-07-02 |
AU2018200074B2 (en) | 2019-05-16 |
CA2760704C (en) | 2017-10-03 |
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EP2427233A4 (en) | 2014-03-12 |
CA2977830A1 (en) | 2010-11-11 |
AU2016201869A1 (en) | 2016-04-21 |
AU2010246115A1 (en) | 2011-12-08 |
US9463004B2 (en) | 2016-10-11 |
AU2016201869B2 (en) | 2017-10-05 |
WO2010129510A2 (en) | 2010-11-11 |
CA2977830C (en) | 2019-09-17 |
JP6110416B2 (ja) | 2017-04-05 |
WO2010129510A3 (en) | 2011-05-12 |
CA2760704A1 (en) | 2010-11-11 |
JP2012525925A (ja) | 2012-10-25 |
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