JP2018064959A - 真空療法で使用するための創傷被覆材 - Google Patents
真空療法で使用するための創傷被覆材 Download PDFInfo
- Publication number
- JP2018064959A JP2018064959A JP2017231883A JP2017231883A JP2018064959A JP 2018064959 A JP2018064959 A JP 2018064959A JP 2017231883 A JP2017231883 A JP 2017231883A JP 2017231883 A JP2017231883 A JP 2017231883A JP 2018064959 A JP2018064959 A JP 2018064959A
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- yarn
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- wound
- open structure
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Abstract
【解決手段】真空創傷療法で使用するための創傷被覆材であって、ゲル形成フィラメントまたは繊維を含むヤーンを備える開放構造である創傷接触層を備え、創傷の組織に対する歪みの付加を促進する開放構造は、滲出液がこれを通って流れることを可能にする多孔性(多効率)を有する
【選択図】図2
Description
創傷被覆材は、滲出液が流れることを可能とするために、多孔性である、
創傷被覆材は、下にある組織が組織の歪みの効果を感じることを可能にするために、孔または穴を有する、
創傷被覆材は、創傷部位をふさぐために、容易に折り重ねる、またはしわを寄せることができる、
創傷被覆材は、繊維状である場合、創傷の中への最小の繊維損失を有する。
創傷被覆材は、創傷床(wound bed)に対するように、創傷の側面に対しても同じ材料特質を呈し、その結果、創傷接触表面が創傷全体にわたって一貫している、
創傷被覆材は、組織の内部成長に抵抗する、
創傷被覆材は、容易な除去を促進するために、十分な湿潤強度を有する、
創傷被覆材は、滲出液を吸収した時に、創傷床に対して圧力を及ぼさない、
創傷被覆材は、ある範囲内の創傷サイズに対して、および様々な形状と深さに対して適している、
創傷被覆材は、除去に際して創傷床に対する破壊を最小にするために、最小のバイオ粘着性を有する、そして、
創傷被覆材は、吸引が創傷被覆材に適用される場合、組織に対して有益な歪みを及ぼす。
ゲル形成フィラメントまたは繊維のヤーンを備える開放構造である創傷被覆材であって、前記開放構造は、滲出液がこれを通って流れることを可能にする多孔性を有する、創傷被覆材と、
前記創傷被覆材によって創傷床から分離されて置かれる真空源と、
前記創傷被覆材を覆い、かつ創傷接触層において相対真空を保持するようになっている真空封止層と
を備えたことを特徴とするデバイスを提供する。
ステープルゲル形成繊維を必要に応じてテキスタイル繊維とブレンドするステップと、
カーディングを行って連続するウェブを形成するステップと、
前記ウェブを延伸してスライバーを作るステップと、
ロータ紡績を行ってヤーンを作るステップと
を備えたことを特徴とする、ゲル形成繊維を含むヤーンを製造するための方法を提供する。
可溶性の支持フィルム上にテキスタイルヤーンで開放構造を刺繍し、
前記支持フィルムを溶かすことによって、これを除去し、
ゲル形成繊維のヤーンを備える構造を形成するために、前記開放構造を化学的に改質して、前記ヤーンにゲル形成特性を与える
ことにより、ゲル形成繊維のヤーンを備える開放構造またはネットを製造する方法を提供する。
ツルッシュラー梳綿機(Trutzschler cotton card)でカーディングを行い、得られたスライバーを1メートル当たり650回転の撚りをかけることによって、カルボキシメチルセルロースステープル繊維(CMC)とリヨセル繊維とのブレンドを、CMC対リヨセル繊維比を50:50、60:40,70:30として作った。
ミニキヤー(mini kier)を用いて実験室でヤーンを変換した。両テストにおいて、ステープルヤーンとフィラメントリヨセルヤーンとを変換した。変換に使用したヤーンは、33テックス テンセル(登録商標)、HF-2011/090、そして20テックス フィラメントリヨセルバッチであるHF-2011/051 (テスト1)及びHF-2011/125 (テスト2)であった。テンセル(登録商標)は、レンチング(Lenzing)社が所有するリヨセルの登録商標であり、使用したテンセル(登録商標)ヤーンはスパンステープルヤーンであった。また、フィラメントリヨセルは、アセロンケミカルズアンドファイバーコーポレーション(Acelon chemicals and Fiber Corporation)(台湾)により、オフトリー社(Offtree Ltd)を通じて供給された。
このテストでは、電気ドリル用いてキヤーのコアを回転させ、速度に応じてヤーンをパッケージから引っ張り出すことにより、キヤーの穴の開いたコアにテンセル(登録商標)ヤーンをきつく巻いた。これは、ヤーンが緊張した(張力を受けた)状態でコアにしっかりときつく巻かれることを意味した。
2番目のテストの目的はより長い長さの変換ヤーンを作ることであったので、ステープルリヨセルヤーンとフィラメントリヨセルヤーンそれぞれで小さなかせを手作りし、これらを変換のために布(fabric)の層の間に配置した。
HF-2011/051を除いて、ヤーンの全てを湿潤および乾燥引張強度について試験した。規格方法BS EN ISO 2062:2009「テキスタイル−パッケージからのヤーン:定速伸張形(CRE)試験機を用いての単一端の破断力と破断時の伸びの測定(Textiles - Yarns from packages: Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester)」に対して必要な修正を行った。ツウィック(Zwick)引張試験機を用い、ゲージ長さを100mmとした。この試験は、破断点に達するまでヤーンに定速伸張を与えるために100N又は20Nのロードセルを用いた。湿潤引張試験での測定は、各ヤーンの中央3cmから4cmを0.2mlの溶液Aで試料を濡らし、1分間放置した。その後、湿潤試料をツウィック試験機のあご部に設置し、締め付けた。引張強度を試験した理由は、製造されたヤーンは、編み作業、織り作業、刺繍作業中に加えられる引っ張りや力に耐えるのに十分強くなければならないからである。
結果を図1に示す。ヤーンの全てが、湿潤時よりも乾燥時の方が強かった。そして、HF-2011/108(70:30ゲル化ヤーン)が、最大の比例強度低下を示した。
ヤーンは、60%CMC繊維と40%ビスコース繊維から成る2/12s梳毛番手を用いて製造した。これらの繊維は各々が約40 mmまでのステープル長の繊維で、これらの繊維を、繊維段階でブレンドした。ヤーンは、梳毛糸システムを使用して製造され、かつ、2つの12番手ストランドを撚り合わせた。乾燥している場合、ヤーンは柔らかい感じであり、かつ、2つのストランドが互いの周りで包まれているため、撚り合わせは明瞭であった。溶液Aで濡れると、ヤーンはゲル化し、かつ膨潤して、より太いヤーンを形成し、さらに撚り合わせは、より際立つようになった。
ゲル形成繊維を備えるヤーンを、実施例3の方法によって製造した。このヤーンを用い、テンセル縦糸とゲル化横糸挿入を用いて布を編んだ。横糸を、編みパターンによって横糸が留められるつまり締め込まれるような方法で横糸を挿入した。この材料は、0-1/1-1/1-2/2-3/3-2/2-1/1-2//の横糸パス記号(weft yarn path notation)を有する。その材料は極めて薄く感じられ、かつ濡れた場合、その材料はゲル化するが、しかし自身の表面上に流体を保持するように見える。
Tajima TMEX-C1201刺繍マシンを用いて、布は、リヨセルスレッド(ボビンに巻かれ、上部スレッドとして)からPVAフィルム上に布を製造した。
スレッド=Tony Slade(T.S. Sewing Supplies)社製Giitermann 120 Texリヨセルスレッド
ソフトウェア=Wilcom ES
プログラム名=ハニカム(honeycomb)
ステッチ数=2層当たり12,369
バッキングフィルム=可溶性PVAフィルム
使用回転速度=1200 rpm
ロックイン構造(locked in structure)を製造するためのたて編み
完全なロックイン構造を製造するためには、いかなる横糸挿入も無く、縦糸で編まれた布が好ましい。次の例(図5)において、1セットが4つの鎖編みからなる布を形成したが、ヤーンは、その後、隣接セットの鎖編みに対して下に重なり、最初の編み針に戻って下に重なる前に、この編み針上で鎖編みを形成し続ける。例えば、この布の最も単純なタイプに対する典型的な糸パス表記は、 0-2/2-1/2-1/2-0/0-1/0-1//であろう。1セットの鎖編み内で2セットの縦糸端部を用いることによって、各ステッチに対して使用されるヤーンを交互にすることは、容易にほどくことができる構造を妨げる。設計内でより多くの編み針を使用することによって、または反対方向で下に重なるために、追加の縦糸巻きを使用することによって、この構造は複雑になり得るであろう。製造した布はロックイン構造であるが、その理由は、編まれたステッチの各々が、その構造がほどけるのを妨げる別の糸端部の編まれたステッチによって固定されており、かつ、鎖編みと垂直となるスレッドも、図6に示されているように、その構造内でループを形成しており、それによって、これらのスレッドが締め込まれることが保証されるからである。
前述のゲル化ヤーンHF-2011/108を用いて、ノースロップ(Northrop)織機で、開放平織構造を製造して、布HF-2011/169を製造した。また、テンセルスパンヤーンHF-2011/090を使用し、かつ布の段階で変換することによって、布HF-2011/136を製造した。その開放平織構造では、7.8端/cmの縦糸密度および5.5ピック/cmの横糸密度が使用されている。
ロックイン構造の織布試料を作るために、からみ織りが使用される。からみ織りは織りの一形態であり、そこでは、縦糸のスレッドが、ピック間で互いに交差させられる。縦糸が互いに交差するので、それらは横糸を適所で保持することができ、そのため、その構造内では、移動がほとんど起こらない。試料を切断した場合、理論上、ヤーンは、除去することが不可能でなくてはならない。なぜならば、自由端部が、その構造の残りの部分内の複数の縦糸によって適所で保持されるからである。からみ織りは、布内のヤーンのすべて、またはいくつかに適用することができる。
Claims (18)
- 真空創傷療法で使用するための創傷被覆材であって、ゲル形成フィラメントまたは繊維を含むヤーンを備える開放構造である創傷接触層を備え、前記開放構造は、滲出液がこれを通って流れることを可能にする多孔性を有することを特徴とする創傷被覆材。
- 前記開放構造が、0.5 mm2から5.0 mm2までの間の孔サイズまたはメッシュサイズを有する、請求項1に記載の創傷被覆材。
- 前記開放構造の孔サイズまたはメッシュサイズが、3.0 mm2から4.0 mm2までの間にある、請求項1または2に記載の創傷被覆材。
- 前記ヤーンが、20 texから40 texまでの線密度を有する、請求項1から3のいずれかに記載の創傷被覆材。
- 前記開放構造が、0.5 mm2から5.0 mm2までの間にある孔サイズまたはメッシュサイズで編まれている、請求項1から4のいずれか1に記載の創傷被覆材。
- 前記被覆材はネットの形態であり、孔サイズまたはメッシュサイズが0.5 mm2から5.0 mm2までの間にある1セットのメッシュを形成するよう、ヤーンが間隔をおいて結合されている請求項1から4のいずれか1に記載の創傷被覆材。
- 真空創傷療法のためのデバイスであって、
ゲル形成フィラメントまたは繊維のヤーンを備える開放構造である創傷被覆材であって、前記開放構造は、滲出液がこれを通って流れることを可能にする多孔性を有する、創傷被覆材と、
前記創傷被覆材によって創傷床から分離されて置かれる真空源と、
前記創傷被覆材を覆い、かつ創傷接触層において相対真空を保持するようになっている真空封止層と
を備えたことを特徴とするデバイス。 - 前記創傷被覆材が、0.5 mm2から5.0 mm2までの間の孔サイズまたはメッシュサイズを有する開放構造である、請求項7に記載のデバイス。
- ゲル形成繊維を含むヤーンを製造するための方法であって、
(i) ステープルゲル形成繊維を、任意選択によって、テキスタイル繊維とブレンドするステップと、
(ii) カーディングを行って連続するウェブを形成するステップと
(iii) ウェブを延伸してスライバーを作るステップと、
(iv) ロータ紡績を行ってヤーンを作るステップと
を備えたことを特徴とする方法。 - 30重量%から100重量%までのゲル形成繊維が、0重量%から70重量%までのテキスタイル繊維と混ぜ合わされる、請求項9に記載の方法。
- 50重量%から100重量%までのゲル形成繊維が、0重量%から50重量%までのテキスタイル繊維と混ぜ合わされる、請求項9に記載の方法。
- 前記繊維が、30 mmから60 mmまでのステープル長を有する、請求項9に記載の方法。
- ゲル形成繊維のヤーンを備える開放構造またはネットを製造するための方法であって、
(i) 可溶性の支持フィルム上にテキスタイルヤーンで開放構造を刺繍するステップと、
(ii)前記支持フィルムを溶かすことによって、これを除去するステップと、
(iii)ゲル形成繊維のヤーンを備える構造を形成するために、前記開放構造を化学的に改質して、前記ヤーンにゲル形成特性を与えるステップと
を備えたことを特徴とする方法。 - ゲル形成繊維を含むヤーンを製造するための方法であって、
(i)セルロース系ステープル繊維またはフィラメントを得るステップと、
(ii)前記セルロース系ステープル繊維またはフィラメントを紡ぐ、または撚って、ヤーンを形成するステップと、
(iii)前記ヤーンを化学的に改質して、前記ヤーンにゲル形成特性を与えるステップと
を備えたことを特徴とする方法。 - 前記化学的な改質が、工業変性アルコールに溶かしたアルカリとモノクロル酢酸ナトリウムの溶液である反応流体を用いたカルボキシメチル化である、請求項13または14に記載の方法。
- 引張強度が少なくとも10 cN/texである、請求項13または請求項14の方法に従って製造されたヤーン。
- 30重量%から100重量%までのゲル形成繊維と、0重量%から70重量%までのテキスタイル繊維とのブレンドを含むヤーン。
- 引張強度が少なくとも10 cN/texである、請求項17に記載のヤーン。
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