JP7282079B2 - センサが使用可能な陰圧創傷監視および療法装置のph感知 - Google Patents
センサが使用可能な陰圧創傷監視および療法装置のph感知 Download PDFInfo
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Description
本出願は、2017年9月27日に米国仮特許出願第62/564,126号で出願された、名称「PH SENGING FOR SENSOR ENABLED NEGATIVE PRESSURE WOUND MONITORING AND THERAPY APPARATUSES」の利益を主張し、その開示は、参照によりその全体が本明細書に組み込まれる。
創傷または創傷を囲む皮膚のうちの少なくとも一方を、創傷または創傷を囲む皮膚と接触して位置決めされた創傷被覆材を用いて監視することであって、創傷被覆材は、創傷のpHの変化に応答して色を変化させるように構成されたpH感受性材料と、pH感受性材料の色変化を検出するように構成された光学センサと、を含む、監視することと、
光学センサからの検出された色変化に基づいて、プロセッサでpH値を計算することと、を含んでもよい。
本明細書に開示するいくつかの実施形態は、ヒトまたは動物の身体に対する創傷療法に関する。そのため、本明細書における創傷へのいかなる言及も、ヒトまたは動物の身体上の創傷を指すことができ、本明細書における身体へのいかなる言及も、ヒトまたは動物の身体を指し得る。開示技術実施形態は、生理学的組織または生体組織への損傷の防止または最小化、または例えば、陰圧源および創傷被覆材コンポーネントおよび装置などを含む、減圧を伴うまたは伴わない損傷した組織(例えば、本明細書で説明した創傷など)の治療に関連し得る。創傷オーバーレイおよびパッキング材料、または、存在する場合には内層を備える、装置およびコンポーネントは、時に総称して本明細書では被覆材と呼ばれる。いくつかの実施形態では、創傷被覆材は、減圧せずに利用されるように提供され得る。
いくつかの実施形態では、創傷の治癒を容易にするおよび促進するために、創傷に被覆材に減圧または陰圧を適用することができる、陰圧創傷療法を使用してそのような創傷の治療を実施することができる。本明細書に開示される創傷被覆材および方法は、身体の他の部分に適用されてもよく、創傷の治療に必ずしも限定されないことも、理解されるであろう。
いくつかの実施形態では、創傷被覆材装置は、1つ以上のナノテクノロジー対応センサ(ナノセンサとも称される)を組み込むか、またはそれを含むことができる。ナノセンサを利用して、体内の細胞の体積、濃度、変位および速度、重力、電気、および磁力、圧力、または温度の変化を測定することができる。ナノセンサは、体内の特定の場所に薬を送達するか、または開発を監視するために、特定の細胞を分子レベルで識別または認識できる場合がある。ナノセンサは、例えば、創傷を監視し、傷がどれほど良く治癒しているかに基づいて治療計画を推奨するために使用できる創傷の特性を検出することができる。一組のナノセンサは、集合コミュニティとして機能することができる。例えば、ナノセンサはネットワークとして通信することができ、基材(例えば、創傷空洞内に設置できる発泡体または創傷充填材)に配合することができる。
センサまたはセンサアレイの正確な設置は、創傷の効果的な治療、または効果的なデータ収集に重要であり得る。例えば、創傷のおよびその周囲の異なる場所は、劇的に異なる特性を有し得る。センサがどこに位置付けられているかを知らなければ(例えば、創傷、他のセンサ、患者などに対して)、測定されたデータを誤解または不正確なものにする恐れがあり、それにより、患者に効果的な治療を提供することが困難である。したがって、いくつかの実施形態では、センサデータの精度の向上を支援するために、1つ以上の技術を利用する。例えば、不完全または不正確な設置の可能性を低減するために、1つ以上の技術が提供されている。加えて、不完全または不正確な設置にもかかわらず、センサデータの精度を向上させるために、1つ以上の技術が提供されている。同様に、正確な情報を収集するために、センサの特定で正確な設置を必要としない1つ以上の技術が提供されている。
図4は、いくつかの実施形態による、創傷被覆材上のpH感受性材料を利用する創傷治療方法400を図示する。特定の実施形態では、pH感受性材料を含む創傷被覆材または創傷パッキング材料は、創傷402上またはその中に設置され得る。pH感受性材料には、pH感受性染料、pH感受性顔料、pH感受性インク、pH感受性超吸収材、pH感受性接着ゲルまたは非接着性ゲル、pH感受性接着性発泡体または非接着性発泡体、pH感受性親水性ポリマー、pH感受性疎水性ポリマー、またはその他の同様の材料を含み得る。例えば、Smith&NephewによるCUTINOVA(商標)水力被覆材に見出されるものなどのポリウレタンゲルマトリクスは、多少の変更を加えたpH感受性材料として好適であり得る。こうしたpH感受性材料は、異なるpH値で色を変化させるであろう要素(染料分子など)を組み込む。当業者には理解されるように、pH感受性要素は、化学結合(イオン、共有結合、および/または極性共有結合など)を介してポリマーの骨格に直接取り付けられるか、ポリマーに吸収されるか、ポリマーに接着されるか、または他の好適な手段を介して取り付けられ得る。さらに、当業者には理解されるように、pH感知材料またはpH感受性材料は、本明細書全体で同義的に使用されてもよい。
1.2-[4(2-ヒドロキシエチルスルホニル)-フェニル]ジアゼニル-4-メチルフェノール(GJM514)(32mg)および4-[4-(2-ヒドロキシエチルスルホニル)-フェニルアゾ]-2、6-ジメトキシフェノール(GJM534)(18mg)(1:0.5)を計量し、これに280μlの硫酸(濃縮物)を加え、30分間反応させる
2.500mlのメスフラスコに446mlの脱イオン水を入れ、これに染料溶液を加える(30分後)
3.これに4.0mlの水酸化ナトリウム(10mlの脱イオン水中3.2gの水酸化ナトリウムペレットなどの32%w/v溶液)を加える
4.次に、50mlの炭酸ナトリウム溶液(2.36M)を加え、脱イオン水を500mlのマークまで追加する
5.ポリウレタンサンプルEU33(BASF Elastogran SP9109 ポリウレタン)をビーカーに入れる
6.ポリウレタンサンプルに染料溶液を加え、攪拌しながら2時間反応させる
7.染料溶液を除去し、次に、脱イオン水(250ml)で洗浄し、穏やかに短時間攪拌した後、洗浄液を除去する
8.水に染料が出なくなるまで、この洗浄ステップを繰り返す
9.最後に脱イオン水(250ml)でサンプルを洗浄する
10.その後、サンプルは酸性溶液、次に塩基溶液に曝露され、色変化に注意することにより評価される
様々な因子は、時間と共にpHセンサ測定値の変動性を異なる創傷内で増大させ得る。例えば、異なる外部光源を介してなどでの照明の変動、pH感受性材料の色特性の変化、pH検出センサの変化、および周囲のその他の態様およびシステム自体は、センサ測定値の変動性を増大させ得る。こうした変動性は、色変化測定値の精度を低下させ得る。したがって、特定の実施形態では、上に記載したものなどの光学pH検出センサは、上に記載したような創傷の実際のpH特性以外の因子によって生じる光学センサの読み取り値の変動性を回避するために、基準材料に正規化/較正される必要があり得る。当業者であれば、正規化および較正が本開示内で互換的に使用され得ることを理解するであろう。
いくつかの実施形態では、1つ以上の電子部品は、創傷に面する側の反対側の創傷接触層の側に位置決めされ得る。本明細書に記載するシステムおよび方法は、そのような創傷接触層に等しく適用可能である。本明細書に記載する創傷被覆材の実施形態は、その他の記載された創傷被覆材の実施形態のいずれかの特徴を含み得る。同様に、本明細書に記載する任意のコントローラは、その他の記載された創傷被覆材の実施形態のいずれかの特徴を含み得る。さらに、特定の実施形態に記載した任意のデバイス、コンポーネント、またはモジュールは、その他の記載されたデバイス、コンポーネント、またはモジュールの実施形態のいずれかの特徴を含み得る。
[付記項1]
創傷監視システムであって、
創傷と接触して位置決めされるように構成された創傷被覆材であって、色を測定するように構成された光学センサを備える、創傷被覆材と、
前記創傷被覆材の底面上に位置決めされたpH感受性材料であって、前記創傷のpHの変化に応答して色を変化させるように構成された、pH感受性材料と、を備え、
前記光学センサが、前記pH感受性材料の前記色変化の検出に基づいて、前記創傷の前記pHを検出するようにさらに構成されている、創傷監視システム。
[付記項2]
前記pH感受性材料が、親水性ポリマー、ゲル、または発泡体を含む、付記項1に記載のシステム。
[付記項3]
前記pH感受性材料には、pH感受性要素が散在している、付記項1~2のいずれか一項に記載のシステム。
[付記項4]
前記pH感受性要素が、不均一に分散されている、付記項3に記載のシステム。
[付記項5]
前記pH感受性要素が、均一に分散されている、付記項3に記載のシステム。
[付記項6]
前記pH感受性材料が、接着材料を含む、付記項1~5のいずれか一項に記載のシステム。
[付記項7]
前記pH感受性材料が、ポリウレタンを含む、付記項1~6のいずれか一項に記載のシステム。
[付記項8]
前記創傷被覆材の前記底面上に位置決めされた非pH感受性材料をさらに含み、前記非pH感受性材料が、創傷滲出液を前記pH感受性材料に誘導するように構成されている、付記項1~7のいずれか一項に記載のシステム。
[付記項9]
前記非pH感受性材料が、親水性ポリマー、ゲル、または発泡体を含む、付記項8に記載のシステム。
[付記項10]
前記非pH感受性材料が、前記創傷被覆材の前記底面上に1つまたは複数のチャネルとして配設されている、付記項8または9に記載のシステム。
[付記項11]
前記1つまたは複数のチャネルが、前記pH感受性材料から前記被覆材の縁まで延在している、付記項10に記載のシステム。
[付記項12]
前記非pH感受性材料が、接着材料を含む、付記項8~11のいずれか一項に記載のシステム。
[付記項13]
コントローラをさらに備え、前記コントローラが、前記光学センサによって測定された前記色をpH値に変換するように構成されている、付記項1~12のいずれか一項に記載のシステム。
[付記項14]
前記コントローラが、前記pH値の表示をユーザに提供するように構成されている、付記項13に記載のシステム。
[付記項15]
前記コントローラが、前記pH値を表示するようにさらに構成されている、付記項14に記載のシステム。
[付記項16]
基準材料をさらに含み、前記基準材料が、安定した色を維持するように構成されている、付記項1~15のいずれか一項に記載のシステム。
[付記項17]
前記基準材料が、前記創傷被覆材に組み込まれている、付記項16に記載のシステム。
[付記項18]
創傷のpHを監視する方法であって、
創傷または創傷を囲む皮膚のうちの少なくとも一方を、前記創傷または前記創傷を囲む皮膚と接触して位置決めされた創傷被覆材を用いて監視することであって、前記創傷被覆材は、前記創傷のpHの変化に応答して色を変化するように構成されたpH感受性材料と、前記pH感受性材料の色変化を検出するように構成された光学センサと、を含む、監視することと、
前記光学センサからの前記検出された色変化に基づいて、プロセッサでpH値を計算することと、を含む、方法。
[付記項19]
前記光学センサが、基準材料の色値を検出するように構成されており、前記pH感受性材料の色値を前記基準材料に正規化することをさらに含む、付記項18に記載の方法。
[付記項20]
前記基準材料が、安定した色を維持するように構成されている、付記項19に記載の方法。
[付記項21]
付記項1~17のいずれか一項に記載のシステムを使用する方法。
[付記項22]
実質的に示されおよび/または記載されるような装置。
[付記項23]
実質的に示されおよび/または記載されるような方法。
[付記項24]
実質的に示されおよび/または記載されるようなシステム。
Claims (15)
- 創傷と接触して位置決めされるように構成された創傷被覆材(500、604)であって、色を測定するように構成された光学センサ(504、608)を備える、創傷被覆材と、
前記創傷被覆材の底面に位置決めされたpH感受性材料であって、前記創傷のpHの変化に応答して色を変化させるように構成され、親水性ポリマー、親水性ゲル、または親水性発泡体を含む、pH感受性材料と、を備え、
前記光学センサが、前記pH感受性材料の色変化の検出に基づいて、前記創傷の前記pHを検出するように構成されており、
前記創傷被覆材の前記底面に位置決めされた非pH感受性材料をさらに含み、前記非pH感受性材料が、創傷滲出液を前記pH感受性材料に誘導するようにさらに構成されている、創傷監視システム。 - 前記pH感受性材料には、pH感受性要素が散在している、請求項1に記載のシステム。
- 前記pH感受性要素が、不均一に分散されている、請求項2に記載のシステム。
- 前記pH感受性要素が、均一に分散されている、請求項2に記載のシステム。
- 前記pH感受性材料が、接着材料を含む、請求項1~4のいずれか一項に記載のシステム。
- 前記pH感受性材料が、ポリウレタンを含む、請求項1~5のいずれか一項に記載のシステム。
- 前記非pH感受性材料が、親水性ポリマー、ゲル、または発泡体を含む、請求項1~6のいずれか一項に記載のシステム。
- 前記非pH感受性材料が、前記創傷被覆材の前記底面に1以上のチャネルとして配設されている、請求項1~7のいずれか一項に記載のシステム。
- 1以上の前記チャネルが、前記pH感受性材料から前記創傷被覆材の縁まで延在している、請求項8に記載のシステム。
- 前記非pH感受性材料が、接着材料を含む、請求項1~9のいずれか一項に記載のシステム。
- コントローラをさらに備え、前記コントローラが、前記光学センサによって測定された前記色をpH値に変換するように構成されている、請求項1~10のいずれか一項に記載のシステム。
- 前記コントローラが、前記pH値の表示をユーザに提供するように構成されている、請求項11に記載のシステム。
- 前記コントローラが、前記pH値を表示するようにさらに構成されている、請求項12に記載のシステム。
- 基準材料をさらに含み、前記基準材料が、安定した色を維持するように構成されている、請求項1~13のいずれか一項に記載のシステム。
- 前記基準材料が、前記創傷被覆材に組み込まれている、請求項14に記載のシステム。
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EP3687380A1 (en) | 2020-08-05 |
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