JP6189473B2 - 慢性創傷を治療及び予防するための装置、方法、及び組成物 - Google Patents
慢性創傷を治療及び予防するための装置、方法、及び組成物 Download PDFInfo
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Description
ポリウレタン連続気泡網状発泡体パッドをスキャフォールド140として選択し、1.5wt%のαリポ酸及び4.5wt%の225ブルームビーフゼラチン(及び、適切な場合には0.3%のEDTA)を含む溶液に浸漬した。αリポ酸に良好な酸素遮断及び持続放出特性を備え、並びに周囲のゼラチナーゼに対する犠牲基質として働くその能力から、ゼラチンを生体適合性結合剤として使用した。αリポ酸をエタノール中に予め溶解し、次に最終溶液に混合した。発泡体パッドを十分な長さの時間にわたり浸漬して、スキャフォールド140に関連して上記に説明したとおり連続気泡網状発泡体内に形成される経路をコーティングした。浸漬後、発泡体パッドを引き抜き、押圧して過剰な溶液を取り除き、一定の重量まで乾燥させた。ある場合には、製剤に防腐剤として安息香酸ナトリウムを添加した。乾燥させた発泡体は、2%重量のαリポ酸、6%重量のゼラチン、及び適切な場合には、0.4%重量のEDTAを含んだ。
エトレンジアミン四酢酸(ethlenediaminetetraacetic acid)(EDTA)などのキレート剤を、実施例1に説明した浸漬溶液に添加した。創傷ドレッシングにEDTAを加えると、プロMMPの活性化に不可欠な亜鉛イオンをキレート化する活性化をMMPが起こすことが防止される。
実施例1〜2に説明した浸漬溶液に水酸化ナトリウム溶液を添加して、リポ酸をリポ酸ナトリウムに変換することができる。得られる溶液のpHは6〜8の範囲でなければならない。リポ酸がリポ酸ナトリウムに変換されることにより、コーティングした発泡体において硫黄臭が発生するリスクが解消される。
上記の実施例1〜2に説明されるコーティングしたポリウレタン発泡体(GranuFoam(登録商標))スキャフォールドを、MMP活性を低減するそれらの能力について、製品Biostep(商標)及びPromogran(商標)などのコーティングしていないコラーゲンベースのスキャフォールドと比較してさらにアッセイした。以下の表1及び表2に2つの個別の実験の結果を示し、これは、コーティングしたスキャフォールドが生物学的に活性な層を僅か10重量%しか含まなくても、コーティングしたスキャフォールドがコラーゲンスキャフォールドと同様にMMP活性を低下させたことを実証している。
上記に説明するαリポ酸でコーティングしたスキャフォールドの放射線安定性を、γ線照射後のROS減少におけるスキャフォールドの有効性を計測することにより評価した。簡潔に言えば、照射したスキャフォールド及び対照のスキャフォールドを20μMのH2O2で処理した。次に処理後2時間又は24時間で、HPO−100センサを備えたTBR4100(World Precision Instrumentsから入手可能)を使用して過酸化物濃度を計測した。3つの試験の結果を表3に要約する。結果は、10回の反復試験で計測された平均の過酸化物減少を表す。示されるとおり、αリポ酸コーティングは大量に照射した後であっても極めて高い活性を(すなわち、抗酸化剤として)維持した。
Claims (14)
- 組織部位に治療を施す創傷ドレッシングにおいて:
複数の流路を有する連続気泡発泡体を含む多孔性ポリウレタン材料であって、前記複数の流路が、前記連続気泡発泡体内の孔から形成されて、前記多孔性ポリウレタン材料を介して減圧を分布させるサイズであり、前記多孔性ポリウレタン材料が前記減圧を受けるように構成され、前記組織部位近傍に位置するように構成された接触面を有する多孔性ポリウレタン材料と;
前記接触面の少なくとも一部を被覆して、前記多孔性ポリウレタン材料の接触面近傍の前記複数の通路の一部内に浸出させたリポ酸誘導体およびゼラチンを含む組成物と;
を具え、
前記リポ酸誘導体が以下の構造を有しており、
上記式においてn1およびn2が、それぞれC1−C10アルキルであり;R1は、H、C1−C10アルキル、C6−C14アリール、アルキルアンモニウム、またはプロトン化アミノ酸であることを特徴とする創傷ドレッシング。 - 請求項1に記載の創傷ドレッシングにおいて、前記組成物中の前記ゼラチンの濃度が0.1%−25%w/wであることを特徴とする創傷ドレッシング。
- 請求項1に記載の創傷ドレッシングが更に、抗菌剤、成長因子、プロティナーゼ阻害剤、キレート剤、あるいは防腐剤を含むことを特徴とする創傷ドレッシング。
- 請求項3に記載の創傷ドレッシングにおいて、前記抗菌剤が非イオン性銀、ポリヘクサメチレンビグアニド、クロルヘキシジン、塩化ベンザルコニウム、又は、トリクロサンであることを特徴とする創傷ドレッシング。
- 請求項3に記載の創傷ドレッシングにおいて、当該創傷ドレッシングがエチレンジアミン四酢酸を含むことを特徴とする創傷ドレッシング。
- 減圧治療システムにおいて:
複数の流路を有する連続気泡発泡体を含む多孔性ポリウレタン材料であって、前記複数の流路が、前記連続気泡発泡体内の孔から形成されて、前記多孔性ポリウレタン材料を介して減圧を分布させるサイズであり、前記多孔性ポリウレタン材料が前記減圧を受けるように構成され、前記組織部位近傍に位置するように構成された接触面を有する多孔性ポリウレタン材料と;
前記接触面の少なくとも一部を被覆して、前記接触面近傍の前記複数の通路の一部内に浸出させたリポ酸誘導体およびゼラチンを含む組成物と;
を具え、
前記リポ酸誘導体が以下の構造を有しており、
上記式においてn1およびn2が、それぞれC1−C10アルキルであり;R1は、H、C1−C10アルキル、C6−C14アリール、アルキルアンモニウム、またはプロトン化アミノ酸であり;
前記減圧システムがさらに:
前記ポリウレタン材料の上に配置され、前記組織部位の上に密閉可能な空間を維持するように構成されたドレープと;
前記密閉可能な空間に流体連通して、前記ドレープを介して前記密閉可能な空間と前記多孔性ポリウレタン材料に減圧を送達する減圧源と;
を具えることを特徴とするシステム。 - 請求項6に記載のシステムにおいて、前記多孔性ポリウレタン材料に適用された減圧により、前記多孔性ポリウレタン材料と前記組織との間の接触範囲が大きくなり、これによって、前記組織の前記ゼラチンに対する曝露が増加することを特徴とするシステム。
- 請求項7に記載のシステムにおいて、前記組織における炎症性活性を、前記接触範囲が増加することによって低減させることを特徴とするシステム。
- 請求項7に記載のシステムにおいて、前記減圧によって、前記多孔性ポリウレタン材料を前記組織に対して押し付けることで、前記接触範囲を増大させることを特徴とするシステム。
- 請求項6に記載のシステムにおいて、前記組織における炎症性活性が、前記組織から前記通路へ体液を除去すること、及び、前記通路内の体液を前記ゼラチンに曝露させることによって、低減することを特徴とするシステム。
- 請求項6に記載のシステムが更に、前記多孔性ポリウレタン材料と前記組織に対して減圧を提供するように構成したマニホルドを具えることを特徴とするシステム。
- 請求項1に記載の創傷ドレッシングにおいて、前記ゼラチンのブルーム値が約150−300gであることを特徴とする創傷ドレッシング。
- 請求項1に記載の創傷ドレッシングにおいて、前記ゼラチンのブルーム値が約200−250gであることを特徴とする創傷ドレッシング。
- 請求項1に記載の創傷ドレッシングにおいて、前記ゼラチンのブルーム値が約225gであることを特徴とする創傷ドレッシング。
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US12/757,562 US8632512B2 (en) | 2010-04-09 | 2010-04-09 | Apparatuses, methods, and compositions for the treatment and prophylaxis of chronic wounds |
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CN103402556B (zh) | 2015-07-22 |
AU2011237638B2 (en) | 2016-05-05 |
WO2011127188A2 (en) | 2011-10-13 |
JP2016175921A (ja) | 2016-10-06 |
US20110251566A1 (en) | 2011-10-13 |
AU2011237638A1 (en) | 2012-08-23 |
CN103402556A (zh) | 2013-11-20 |
US8632512B2 (en) | 2014-01-21 |
JP2013536156A (ja) | 2013-09-19 |
CA2790559A1 (en) | 2011-10-13 |
WO2011127188A3 (en) | 2015-09-17 |
EP2555805B1 (en) | 2020-08-19 |
CN105126156A (zh) | 2015-12-09 |
EP2555805A2 (en) | 2013-02-13 |
TW201141548A (en) | 2011-12-01 |
JP5988309B2 (ja) | 2016-09-07 |
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