JP5719355B2 - 止血スポンジ - Google Patents
止血スポンジ Download PDFInfo
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- JP5719355B2 JP5719355B2 JP2012515391A JP2012515391A JP5719355B2 JP 5719355 B2 JP5719355 B2 JP 5719355B2 JP 2012515391 A JP2012515391 A JP 2012515391A JP 2012515391 A JP2012515391 A JP 2012515391A JP 5719355 B2 JP5719355 B2 JP 5719355B2
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Classifications
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Description
本発明は、止血スポンジ、および上記スポンジを製造するための方法、ならびに止血におけるそれらの使用の分野に関する。
ヒトもしくは動物起源の凝固因子に基づく生物学的接着剤は、長く知られてきた。フィブリノゲンおよび第XIII因子に基づいて組織接着剤を製造するための方法は、特許文献1、特許文献2および特許文献3に記載されている。上記組織接着剤は、通常、トロンビン(これは、フィブリノゲンに対して酵素的に作用して、フィブリンを形成し、そして第XIII因子に対して酵素的に作用して、活性第XIIIa因子を形成する)を含む別個の成分と一緒に塗布され、上記フィブリンを架橋して、安定なフィブリン凝塊を形成する。
本発明の主題は、線維性生体材料のマトリクスおよび上記マトリクス材料に付着させられる流体吸収性の粒状材料の粒子を含む多孔性止血スポンジである。創傷治癒のための線維性生体材料の以前のパッド(特に、コラーゲンパッド)は、止血が損なわれた条件下(例えば、ヘパリン化後)において、止血を誘導できないことが見いだされた。本発明のコラーゲンのマトリクス内での粒状材料の使用は、流体吸収性の粒状材料なしの止血と比較して、止血を改善する。特定の理論には限定されないが、高い液体吸収能力を有する粒子を使用する場合、血液中に存在する高濃度の凝固因子が達成され得、このことは止血に都合がよいようである。このような粒子を上記出血している創傷に直接適用することは困難である。なぜなら、上記粒子は、血流で流れてしまう傾向にあるからである。止血スポンジ中にこのような粒子を組み込むことは、このような粒子の局所固定を可能にし、上記スポンジの止血作用をさらに改善し得る。
物もしくは自明な変更もしくは改変は、本発明によって含まれる。
例えば、本発明は以下の項目を提供する。
(項目1)
線維性生体材料のマトリクスおよび該マトリクス材料に付着させられる流体吸収性の粒状材料の粒子を含む、多孔性止血スポンジ。
(項目2)
前記線維性生体材料は、コラーゲンを含む、項目1に記載のスポンジ。
(項目3)
前記粒状材料は、止血材料である、項目1に記載のスポンジ。
(項目4)
前記粒状材料は、架橋ポリマーである、項目3に記載のスポンジ。
(項目5)
前記粒状材料は、ゼラチン、フィブリン、コラーゲンもしくはこれらの任意の混合物を含む、項目3に記載のスポンジ。
(項目6)
トロンビンもしくはトロンビン前駆物質をさらに含む、項目1に記載のスポンジ。
(項目7)
接着剤層をさらに含む、項目1に記載のスポンジ。
(項目8)
前記接着剤層は、生体吸収性ポリマーを含む、項目7に記載のスポンジ。
(項目9)
前記接着剤は、第1の架橋可能な成分、反応を可能にする条件下で該第1の架橋可能な成分と架橋する第2の架橋可能な成分を含む、項目7に記載のスポンジ。
(項目10)
前記第1の架橋可能な成分および/もしくは第2の架橋可能な成分は、PEGもしくはその誘導体を含む、項目9に記載のスポンジ。
(項目11)
前記接着剤は、スクシンイミジル基もしくはマレイミジル基およびチオール基もしくはアミノ基を含む、項目7に記載のスポンジ。
(項目12)
前記接着剤層は、前記スポンジの少なくとも一方の側面上に不連続にコーティングされている、項目7に記載のスポンジ。
(項目13)
凍結乾燥もしくは風乾されている、項目1に記載のスポンジ。
(項目14)
前記マトリクス材料より大きな引張り強さを有する支持層を含む、項目1に記載のスポンジ。
(項目15)
前記支持層は、生体吸収性ポリマーを含む、項目14に記載のスポンジ。
(項目16)
前記支持層は、前記マトリクス材料より高い密度を有する、項目14に記載のスポンジ。
(項目17)
多孔性止血スポンジを製造するための方法であって、該方法は、線維性生体材料の流体および流体吸収性の粒状材料の懸濁された粒子を提供する工程、ならびに該流体と該懸濁された粒子とを乾燥させ、それによって、線維性生体材料のマトリクスおよび該マトリクス材料に付着させられる流体吸収性の粒状材料の粒子を含む多孔性止血スポンジを得る工程、を含む、方法。
(項目18)
項目17に記載の方法によって得ることができる、多孔性止血スポンジ。
(項目19)
傷害を処置するための方法であって、該方法は、線維性生体材料のマトリクスおよび該マトリクス材料に付着させられる流体吸収性の粒状材料を含む多孔性止血スポンジを、傷害の部位に施す工程を包含する、方法。
(項目20)
前記傷害は、創傷、出血、損傷組織および/もしくは出血組織を含む、項目19に記載の方法。
本発明の目的は、改善された止血特性を有する線維性生体材料に基づく止血スポンジである。この目的は、上記スポンジに付着させられる流体吸収性の粒状材料を提供することによって達成される。上記線維性生体材料は、任意の止血作用もしくは血液凝固作用を支援し得る。この効果は、本発明の粒状材料によって強化され得る。これら粒子は、上記粒子の十分に強力な固定を提供するために、上記線維性生体材料に付着させられ、貯蔵寿命を増大させ、使用の間に、特に、機械的張力が上記粒子の望ましくない剥離をもたらし得る創傷被覆の場合の耐久性を増大させる。用語「付着させられる」とは、本発明によれば、上記粒子が、上記線維性生体材料内に配置させられるか、もしくはその中に埋め込まれるか、もしくはその中に捕捉されることを意味する。上記粒子は、いずれの秩序立てられたもしくは秩序立てられていない状態においても、上記マトリクス材料中に保持され得、好ましくは、そこに均質に配置される。上記スポンジは、傷害に適用される場合に体液を吸収し得る、線維性生体材料の多孔性ネットワークである。さらに、上記スポンジは、通常は可撓性であり、多様な組織および種々の形状を有する位置に適用するのに適している。
80mg/mlの架橋されたゼラチン粒子および2.1mg/mlのコラーゲンを含む均質な懸濁物を、攪拌によって調製する。この懸濁物を、トレイ(層の厚みは3.5mm)に満たし、凍結乾燥させる。捕捉された架橋ゼラチン粒子を含むコラーゲンスポンジを得る。
架橋されたゼラチン粒子を含むコラーゲンスポンジを、実施例1に従って調製する。凍結乾燥した後、グリッドを上記得られた生成物の上に置く。14mg/cm2の、2種の架橋可能なポリエチレングリコールポリマー(PEG−AおよびPEG−B)の1:1(w/w)粉末混合物を、上記パッド上のグリッドの上に適用する。上記グリッドの穴のみを、上記粉末混合物によって覆う。上記粉末を、上記PEG成分の融解点より高い温度で短時間(2〜5分)加熱することによって、上記パッド上に固定する。上記グリッドを除去し、不連続の反応性PEGコーティングを有するパッドを得る。PEG−Aは、PEG−スクシンイミジル粉末であり、PEG−Bは、PEG−チオール粉末である。
ヘパリン化(2×ACT)ブタに対する止血の肝臓表面擦傷モデルを、実施例1において生成したパッドの止血特性を試験するために使用する。平らで丸く、回転する擦傷ツールを使用して、円形の出血創傷を、ヘパリン化ブタの表面に作る。パッド(3×3cm)を、出血創傷の上に乾燥させて適用し、2分間にわたって生理食塩水で湿らせたガーゼで僅かに圧迫することによって、適所に保持する。2分後、上記出血は止まる。次の1分以内に、出血は認められない。上記パッド内での血液凝固が認められる。3分後、上記パッドを、冠詞で補助しながら適用部位から除去する。上記適用部位への僅かな付着のみが認められる。
実施例2に記載されるパッドを、同一の動物止血モデルにおいて、実施例4に記載されるものと同じ様式で適用する、上記不連続反応性PEGコーティングは、上記創傷に面している。適用の2、3分後、出血は認められない。血液は、上記コーティングされていない領域によって上記パッドに入り、上記パッド内で凝固する。適用の3分後に、上記止血シールを破壊せずに上記適用部位から上記パッドを容易に除去することは不可能である。上記反応性PEGコーティングによって引き起こされる付着は、上記パッドの内部引っ張り強さより強い。
実施例3に記載されるパッドを、同じ動物止血モデルに、実施例4に記載されるのと同じ様式で適用する。上記不連続反応性PEGコーティングは、上記創傷に面している。実施例5に記載されるのと同じ様式において止血を得る。上記さらなるコラーゲン層は、滑らかなシートとして、上記止血性コラーゲン/架橋されたゼラチン層を覆う。上記創傷表面への付着は、実施例5におけるものと類似である。
Claims (15)
- 線維性生体材料のマトリクスおよび流体吸収性の粒状材料の粒子を含む、多孔性止血スポンジであって、該粒子は、該マトリクス材料内に配置させられているか、該マトリクス材料中に埋め込まれているか、または該マトリクス材料中に捕捉されており、該粒状材料は、止血架橋ポリマーであり、該スポンジは、さらに接着剤層を含み、該接着剤層は、第1の架橋可能な成分、および反応を可能にする条件下で該第1の架橋可能な成分と架橋する第2の架橋可能な成分を含み、そして該第1の架橋可能な成分および/または第2の架橋可能な成分は、PEGまたはその誘導体を含む、多孔性止血スポンジ。
- 前記線維性生体材料は、コラーゲンを含む、請求項1に記載のスポンジ。
- 前記粒状材料は、ゼラチン、フィブリン、コラーゲンもしくはこれらの任意の混合物を含む、請求項1に記載のスポンジ。
- トロンビンもしくはトロンビン前駆物質をさらに含む、請求項1に記載のスポンジ。
- 前記接着剤層は、生体吸収性ポリマーを含む、請求項1に記載のスポンジ。
- 前記接着剤は、スクシンイミジル基もしくはマレイミジル基およびチオール基もしくはアミノ基を含む、請求項1に記載のスポンジ。
- 前記接着剤層は、前記スポンジの少なくとも一方の側面上に不連続にコーティングされている、請求項1に記載のスポンジ。
- 凍結乾燥もしくは風乾されている、請求項1に記載のスポンジ。
- 前記マトリクス材料より大きな引張り強さを有する支持層を含む、請求項1に記載のスポンジ。
- 前記支持層は、生体吸収性ポリマーを含む、請求項9に記載のスポンジ。
- 前記支持層は、前記マトリクス材料より高い密度を有する、請求項9に記載のスポンジ。
- 多孔性止血スポンジを製造するための方法であって、該方法は、線維性生体材料の流体および流体吸収性の粒状材料の懸濁された粒子を混合する工程、ならびに該流体と該懸濁された粒子とを乾燥させ、それによって、線維性生体材料のマトリクスおよび流体吸収性の粒状材料の粒子を含む多孔性止血スポンジを得る工程、を含み、該粒子は、該マトリクス材料内に配置させられているか、該マトリクス材料中に埋め込まれているか、または該マトリクス材料中に捕捉されており、該粒状材料は、止血架橋ポリマーであり、該スポンジは、さらに接着剤層を含み、該接着剤層は、第1の架橋可能な成分、および反応を可能にする条件下で該第1の架橋可能な成分と架橋する第2の架橋可能な成分を含み、そして該第1の架橋可能な成分および/または第2の架橋可能な成分は、PEGまたはその誘導体を含む、方法。
- 請求項12に記載の方法によって得ることができる、多孔性止血スポンジ。
- 傷害を処置するための多孔性止血スポンジであって、線維性生体材料のマトリクスおよび流体吸収性の粒状材料を含み、該粒子は、該マトリクス材料内に配置させられているか、該マトリクス材料中に埋め込まれているか、または該マトリクス材料中に捕捉されており、該粒状材料は、止血架橋ポリマーであり、該スポンジは、さらに接着剤層を含み、該接着剤層は、第1の架橋可能な成分、および反応を可能にする条件下で該第1の架橋可能な成分と架橋する第2の架橋可能な成分を含み、そして該第1の架橋可能な成分および/または第2の架橋可能な成分は、PEGまたはその誘導体を含み、該多孔性止血スポンジは、傷害の部位に施されることを特徴とする、多孔性止血スポンジ。
- 前記傷害は、創傷、出血、損傷組織および/もしくは出血組織を含む、請求項14に記載の多孔性止血スポンジ。
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CN102802683A (zh) | 2012-11-28 |
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PL2442835T3 (pl) | 2015-07-31 |
BRPI1015979A2 (pt) | 2016-04-19 |
JP2012529943A (ja) | 2012-11-29 |
CN102802683B (zh) | 2015-11-25 |
MX2011013795A (es) | 2012-04-30 |
CO6430437A2 (es) | 2012-04-30 |
IL216671A0 (en) | 2012-02-29 |
KR20120034078A (ko) | 2012-04-09 |
AU2010262058B2 (en) | 2013-08-29 |
CA2765117C (en) | 2017-07-11 |
PT2442835E (pt) | 2015-03-23 |
KR101699992B1 (ko) | 2017-01-26 |
US20190374673A1 (en) | 2019-12-12 |
CA2765117A1 (en) | 2010-12-23 |
HRP20150255T1 (hr) | 2015-05-08 |
AU2010262058A1 (en) | 2011-12-22 |
US9162006B2 (en) | 2015-10-20 |
BRPI1015979B1 (pt) | 2018-05-22 |
WO2010145817A2 (en) | 2010-12-23 |
WO2010145817A3 (en) | 2011-02-17 |
IL216671A (en) | 2015-06-30 |
EP2442835B1 (en) | 2014-12-10 |
ES2532428T3 (es) | 2015-03-26 |
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