JP5779249B2 - 癒着防止用医用材料及びその製造方法 - Google Patents
癒着防止用医用材料及びその製造方法 Download PDFInfo
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Description
(1)物理的障壁として挿入されて癒着を予防するもの。
(2)その材料自身に細胞を排除する性質を持たせることで癒着を予防するもの。
(3)癒着防止に効果を持つ物質により癒着を防止するもの。
(1)及び(2)のタイプの癒着防止材料は、癒着防止可能な部位が限定されている、或いは材料自体の生体との親和性に問題がある等、確実な癒着防止が困難であり、満足な性能を発揮するとは言い難い。
[2]前記生体内吸収性材料が、ゼラチン、コラーゲン、キチン、部分脱アセチル化キチン、キトサン、ヒアルロン酸、カルボキシメチルセルロース、これらの誘導体、及びこれらの塩からなる群より選択される少なくとも一種である前記[1]に記載の癒着防止用医用材料。
[3]生体内における形態維持日数(T)が1<T<21である前記[1]又は[2]に記載の癒着防止用医用材料。
[5]前記生体内吸収性基材を水不溶化処理した後に、前記グリセリン水溶液を保持させる前記[4]に記載の癒着防止用医用材料の製造方法。
[6]前記グリセリンを含有する前記生体内吸収性基材を水不溶化処理する前記[4]に記載の癒着防止用医用材料の製造方法。
[7]前記生体内吸収性材料が、中性領域で溶解する塩である場合に、所定の形状に成形する前又は後に、pHを調整して前記生体内吸収性基材を水不溶化処理する前記[4]に記載の癒着防止用医用材料の製造方法。
[8]放射線照射により前記生体内吸収性基材を水不溶化処理する前記[5]に記載の癒着防止用医用材料の製造方法。
[9]放射線照射量が10〜60kGyである前記[8]に記載の癒着防止用医用材料の製造方法。
[10]多価カチオンを用いて前記生体内吸収性基材を水不溶化処理する前記[5]又は[6]に記載の癒着防止用医用材料の製造方法。
[11]前記多価カチオンが、カルシウムイオン、チタンイオン、マグネシウムイオン、鉄イオン、及びジルコニウムイオンの少なくともいずれかである前記[10]に記載の癒着防止用医用材料の製造方法。
[12]分子内に二以上の官能基を有する化合物を用いて前記生体内吸収性基材を水不溶化処理する前記[5]又は[6]に記載の癒着防止用医用材料の製造方法。
[13]生体内吸収性材料の水溶液を凍結乾燥してスポンジ状の前記生体内吸収性基材を得る工程をさらに含む前記[4]〜[12]のいずれかに記載の癒着防止用医用材料の製造方法。
A(%)=(B/C)×100 ・・・(1)
グリセリン濃度を変えたグリセリン標準液(水溶液)をHPLC分析し、グリセリンのピーク面積に基づいてグリセリンの検量線を作成した。癒着防止用医用材料からなる試験片0.5gを20℃の水30mLに入れて3時間放置した。試験片を水から取り出した後、その水を1mL採取してHPLC分析を行い、作成した検量線からグリセリン濃度を測定し、グリセリン保持率を算出した。なお、HPLC分析の条件は以下に示す通りである。
カラム:TSKgel G4000PWXL(東ソー社製、7.8mm×30.0mm)×2本
流速:1.0mL/min
検出:RI
サンプル量:10μL
溶出液:0.2N リン酸カリウムバッファー(pH6.88)
圧力:20kg/cm2
温度:50℃
酸性法ゼラチン(ブタ皮膚由来、シグマ社製)10gを水に溶解させて全量を100gとし、10%のゼラチン水溶液を調製した。調製したゼラチン水溶液を、ポリテトラフルオロエチレンで内面をコーティングした15cm×15cmのトレーに30gずつ分注した。32℃に設定した乾燥機(商品名「プログラムインキュベーター IN800」、ヤマト化学社製)にトレーを入れ、分注したゼラチン水溶液を風乾して3gのゼラチン膜を得た。得られたゼラチン膜を5℃に冷却した水に入れて水和させた後、γ線を20kGy照射してゼラチン膜を水不溶化処理した。水不溶化処理したゼラチン膜の膨潤度は600%であり、水溶出率は3.5%であった。水不溶化処理したゼラチン膜を5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、ゼラチン膜の内部に5%グリセリン水溶液を保持させて癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は25%であり、グリセリン保持率は0%であった。
乾燥機の温度を50℃としたこと以外は、前述の実施例1と同様にして3gのゼラチン膜を得た。得られたゼラチン膜を5体積%のグルタルアルデヒド水溶液100mL中に浸漬し、室温で6時間反応させてゼラチン膜を水不溶化処理した。水不溶化処理したゼラチン膜の膨潤度は550%であり、水溶出率は3.6%であった。水不溶化処理したゼラチン膜を水で十分に洗浄後、5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、ゼラチン膜の内部に5%グリセリン水溶液を保持させて癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は22.5%であり、グリセリン保持率は0%であった。
前述の実施例1と同様にして3gのゼラチン膜を得た。得られたゼラチン膜を5体積%のヘキサメチレンジイソシアナートを含有するエタノール溶液100mL中に浸漬し、室温で18時間反応させてゼラチン膜を水不溶化処理した。水不溶化処理したゼラチン膜の膨潤度は450%であり、水溶出率は4.0%であった。水不溶化処理したゼラチン膜をエタノールで十分に洗浄後、5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、ゼラチン膜の内部に5%グリセリン水溶液を保持させて癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は17.5%であり、グリセリン保持率は0%であった。
ヒアルロン酸ナトリウム(分子量80万、資生堂社製)1g、グリセリン(日本薬局方グリセリン、阪本薬品工業社製)0.5g、及び水を混合し、全量100mLの溶液を調製した。調製した溶液をポリテトラフルオロエチレン製のトレー(直径13cm)に50gずつ分注した。分注した溶液を30℃で風乾して、グリセリンを含有する合計1.3gの膜を得た。次に、得られた膜をトレーに残したまま、1%のCaCl2・2H2O水溶液5mL加え、30℃で風乾して膜を水不溶化処理して癒着防止用医用材料を得た。なお、水不溶化処理した膜の膨潤度は2000%であり、水溶出率は9%であった。また、得られた癒着防止用医用材料のグリセリン含有割合は50%であり、グリセリン保持率は0%であった。
前述の実施例4と同様にしてグリセリンを含有したヒアルロン酸ナトリウム水溶液を30℃で風乾して合計1.3gの膜を得た。次に、得られた膜をトレーに残したまま、チタンの水系キレート剤(製品名TC−315、マツモト交商製)を水にて10倍に希釈後、5mLを加え膜を水不溶化した。水不溶化処理した膜の膨潤度は1800%であり、水溶出率は2%であった。水不溶化処理した膜を水で十分に洗浄後、5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、膜の内部に5%グリセリン水溶液を保持させて癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は50%であり、グリセリン保持率は0%であった。
カルボキシメチルセルロース(CMC)(第一工業社製 セロゲンPR−Sニッキョク)3gに水を加え、全量100gのCMC溶液を調製した。調製したCMC溶液を前述の実施例1と同様にして分注及び風乾し、CMC膜を得た。得られたCMC膜を120℃のインキュベータに入れ、乾熱架橋により水不溶化処理した。水不溶化したCMC膜の膨潤度は250%であり、水溶出率は2%であった。水不溶化処理したCMC膜を5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、CMC膜の内部に5%グリセリン水溶液を保持させて癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は7.5%であり、グリセリン保持率は0%であった。
ヒアルロン酸ナトリウム(分子量80万、資生堂社製)1g、グリセリン(日本薬局方グリセリン、阪本薬品工業社製)0.5g、及び水を混合し、全量100mLの溶液を調製した。調製した溶液をポリテトラフルオロエチレン製のトレー(直径13cm)に50gずつ分注した。分注した溶液を30℃で風乾して、グリセリン水溶液を含有する合計1.5gの膜を得た。次に、得られた膜をトレーに残したまま、0.2mol/L塩酸水溶液5mLを加え、30℃で風乾して膜を水不溶化処理して癒着防止用医用材料を得た。なお、水不溶化処理した膜の膨潤度は1000%であり、水溶出率は10%であった。また、得られた癒着防止用医用材料のグリセリン含有割合は10%であり、グリセリン保持率は0%であった。
ヒアルロン酸ナトリウム(分子量80万、資生堂社製)1g、グリセリン(日本薬局方グリセリン、阪本薬品工業社製)0.5g、及び水を混合し、全量100mLの溶液を調製した。調製した溶液をポリテトラフルオロエチレン製のトレー(直径13cm)に50gずつ分注した。分注した溶液を30℃で風乾して、グリセリン水溶液を含有する合計1.5gの膜を得た。次に、得られた膜をトレーに残したまま、0.2mol/L塩酸水溶液5mLを加え、30℃で風乾して膜を水不溶化処理した。次に、この膜を減圧下、120℃で14時間加熱して癒着防止用医用材料を得た。なお、水不溶化処理した膜の膨潤度は900%であり、水溶出率は6%であった。また、得られた癒着防止用医用材料のグリセリン含有割合は10%であり、グリセリン保持率は0%であった。
γ線を5kGy照射して水不溶化処理したこと以外は、前述の実施例1と同様にして水不溶化処理したゼラチン膜を得た。水不溶化処理したゼラチン膜の膨潤度は3500%であり、水溶出率は60%であった。その後同様に、5%濃度のグリセリン水溶液50mLに2時間ずつ3回浸漬し、ゼラチン膜の内部に5%グリセリン水溶液を保持させた後に、膜を風乾し乾燥した癒着防止用医用材料を得た。得られた癒着防止用医用材料のグリセリン含有割合は25%であり、グリセリン保持率は0%であった。
0.5%のCaCl2・2H2O水溶液2mLを用いて水不溶化処理したこと以外は、前述の実施例4と同様にして、ヒアルロン酸ナトリウムを生体内吸収性材料とする癒着防止用医用材料を得た。なお、水不溶化処理した膜の膨潤度は5000%であり、水溶出率は80%であった。また、得られた癒着防止用医用材料のグリセリン含有割合は25%であり、グリセリン保持率は0%であった。
成犬(ビーグル犬、雌、1.5才)を全身麻酔処置後に開胸し、左肺を露出させた。実施例1〜5、7、8、及び参考例6で得られた癒着防止用医用材料(フィルム)をγ線滅菌後に肺表面に配置し、閉胸した。2週間後、同犬を全身麻酔処置後に開胸したところ、癒着は生じていなかった。また、フィルムは分解されていた。これに対して、フィルムを配置せず、同様の処置をおこなった犬は肺と胸膜に著しい癒着が観察された。
Claims (13)
- 生体内吸収性材料を含有する、膨潤度が200〜3000質量%及び水溶出率が10質量%以下の生体内吸収性基材に、グリセリン又はグリセリン水溶液が保持されてなり、
前記生体内吸収性基材の質量に対する、前記グリセリンの割合が10〜70質量%であり、
前記生体内吸収性基材の形状が、膜状、紐状、棒状、板状、管状、方形状、又はスポンジ状であり、
前記グリセリン又は前記グリセリン水溶液と前記生体内吸収性基材との合計質量の50倍以上の25℃の水に3時間浸漬した後の前記グリセリンの残存量が、浸漬する前の前記グリセリンの量の30質量%以下である癒着防止用医用材料。 - 前記生体内吸収性材料が、ゼラチン、コラーゲン、キチン、部分脱アセチル化キチン、キトサン、ヒアルロン酸、カルボキシメチルセルロース、これらの誘導体、及びこれらの塩からなる群より選択される少なくとも一種である請求項1に記載の癒着防止用医用材料。
- 生体内における形態維持日数(T)が1<T<21である請求項1又は2に記載の癒着防止用医用材料。
- 請求項1〜3のいずれか一項に記載の癒着防止用医用材料の製造方法であって、
グリセリン又はグリセリン水溶液を生体内吸収性基材に保持させる工程を含む癒着防止用医用材料の製造方法。 - 前記生体内吸収性基材を水不溶化処理した後に、前記グリセリン水溶液を保持させる請求項4に記載の癒着防止用医用材料の製造方法。
- 前記グリセリンを含有する前記生体内吸収性基材を水不溶化処理する請求項4に記載の癒着防止用医用材料の製造方法。
- 前記生体内吸収性材料が、中性領域で溶解する塩である場合に、
所定の形状に成形する前又は後に、pHを調整して前記生体内吸収性基材を水不溶化処理する請求項4に記載の癒着防止用医用材料の製造方法。 - 放射線照射により前記生体内吸収性基材を水不溶化処理する請求項5に記載の癒着防止用医用材料の製造方法。
- 放射線照射量が10〜60kGyである請求項8に記載の癒着防止用医用材料の製造方法。
- 多価カチオンを用いて前記生体内吸収性基材を水不溶化処理する請求項5又は6に記載の癒着防止用医用材料の製造方法。
- 前記多価カチオンが、カルシウムイオン、チタンイオン、マグネシウムイオン、鉄イオン、及びジルコニウムイオンの少なくともいずれかである請求項10に記載の癒着防止用医用材料の製造方法。
- 分子内に二以上の官能基を有する化合物を用いて前記生体内吸収性基材を水不溶化処理する請求項5又は6に記載の癒着防止用医用材料の製造方法。
- 生体内吸収性材料の水溶液を凍結乾燥してスポンジ状の前記生体内吸収性基材を得る工程をさらに含む請求項4〜12のいずれか一項に記載の癒着防止用医用材料の製造方法。
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US20180000994A1 (en) * | 2015-02-27 | 2018-01-04 | Dainichiseika Color & Chemicals Mfg. Co., Ltd. | Method for manufacturing medical material, medical material, and anti-adhesion material |
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