JP4667393B2 - フッ素化ポリマーコーティングを有する植込み型医療器具、およびその塗布方法 - Google Patents
フッ素化ポリマーコーティングを有する植込み型医療器具、およびその塗布方法 Download PDFInfo
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- JP4667393B2 JP4667393B2 JP2006543926A JP2006543926A JP4667393B2 JP 4667393 B2 JP4667393 B2 JP 4667393B2 JP 2006543926 A JP2006543926 A JP 2006543926A JP 2006543926 A JP2006543926 A JP 2006543926A JP 4667393 B2 JP4667393 B2 JP 4667393B2
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/08—Materials for coatings
- A61L31/10—Macromolecular materials
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
植込み型ステント(implantable stent)および他の拡張型医療器具は、バルーン血管形成術のような多くの最小侵襲性外科的手技にますます用いられてきている。ステントは、急性および亜急性の血管閉塞、内膜解剖、および血管壁の弾性反跳の合併症を緩和し、血管形成術関連の再狭窄率を減少させる。再狭窄は、血管の内壁と係合するステントの金属表面の不適合により生じ得、亜急性血栓症を誘発する。再狭窄の他の可能な原因は、動脈の内壁に沿って配置されたときのステントの金属表面の反跳である。ステント内再狭窄は、通常、ステント植込みの数週間から数ヶ月以内に生じる。
本発明は、一般的に、フッ素化コーティングを有する植込み型医療器具、およびそれを塗布する方法に関する。より具体的には、本発明は、非晶質フルオロポリマーを含む耐腐食性コーティングで塗布された植込み型の金属系医療器具を提供する。本発明は、また、そのような医療器具上にフッ素化ポリマーコーティングの薄層を堆積させるための方法を提供する。本方法を用いて塗布することのできる植込み型の金属系医療器具の例には、血管形成術用バルーン、カテーテル、ガイドワイヤ、血管パッチ、フィルタ、血管ステント、制御された薬物送達のための医薬溶出ステント、および他の拡張型医療器具が含まれるが、これらに限定されない。
本発明は、非晶質フッ素化コーティングを有する金属系植込み型医療器具、およびその塗布方法を提供する。具体的な例において、非晶質フッ素化コーティングは、光学的に透明であり、化学的腐食に対し耐性がある。
250mlのガラスビーカー中で、1gのTEFRON(登録商標)AF1660と19gのFLUORINERT(登録商標)FC40を、均質な透明溶液が得られるまで、混合する。この溶液を、0.2ミクロンのガラスフィルターを用いて濾過したのち、塗布に用いる。アンギオメド(Angiomed)が提供しているニチノールステント(メモフレックス(Memoflexx)ステント、直径8mm、長さ50mm)をこのポリマー溶液に浸漬し、溶液から取り出す。風乾により溶媒を除去する。顕微鏡で観察すると、ステントの表面上に透明な薄いポリマーコーティングが目視できる。
250mlのガラスビーカー中で、1gのTEFRON(登録商標)AF1660と19gのFLUORINERT(登録商標)FC40を、均質な透明溶液が得られるまで、混合する。この溶液に5gの塩化ナトリウムを加え、その溶液/懸濁液を磁気攪拌器を用いて攪拌する。アンギオメドが提供しているニチノールステント(メモフレックスステント、直径8mm、長さ50mm)をこのポリマー溶液に浸漬する。風乾により溶媒を除去する。ついで、ステントを、1000mlの蒸留水を収容するビーカーに移し、塩が完全に浸出するまでインキュベートする。塩の除去により多孔質ポリマーコーティングが生成する。この多孔性は、組織の内殖を誘起することを助成する。
Claims (43)
- テトラフルオロエチレン(TEF)および4,5−ジフルオロ−2,2−ビス(トリフルオロメチル)−1,3−ジオキソールを含む非晶質フルオロポリマーコーティングで塗布された金属表面を有し、前記コーティングが、1〜100マイクロメートルの厚さを有し、放射線不透過剤をさらに含む、血管ステント。
- 前記非晶質フルオロポリマーコーティングが、テトラフルオロエチレン(TEF)および60モル%〜90モル%の4,5−ジフルオロ−2,2−ビス(トリフルオロメチル)−1,3−ジオキソールを含む請求項1に記載の器具。
- 前記非晶質フルオロポリマーコーティングが、TEFLON(登録商標) AF 1600、またはTEFLON AF 2400(登録商標)である請求項1に記載の器具。
- 前記金属が、ステンレス鋼、チタン、ニッケル、金属合金、白金、金または生体適合性金属である請求項1に記載の器具。
- 前記金属が、チタンとニッケルの合金、またはNITINOL(登録商標)である請求項4に記載の器具。
- 前記コーティングが、光学的に透明または化学的耐性である請求項1に記載の器具。
- 前記コーティングが、1〜20マイクロメートルの厚さを有する請求項1に記載の器具。
- 前記コーティングが、5〜15マイクロメートルの厚さを有する請求項7に記載の器具。
- 前記血管ステントが、治療剤を放出可能である請求項1に記載の器具。
- 前記コーティングが、治療剤をさらに含む請求項1に記載の器具。
- 前記治療剤が、抗再狭窄剤、抗狭窄剤、抗増殖剤、免疫調節剤、抗血栓剤、抗酸化剤、エストロゲン、成長因子阻害剤、アンチセンスオリゴヌクレオチドまたはコラーゲン阻害剤である請求項10に記載の器具。
- 前記治療剤が、パクリタキセルである請求項11に記載の器具。
- 前記放射線不透過剤が、硫酸バリウム、金、タンタル、トリヨード安息香酸またはトリヨード安息香酸誘導体である請求項10に記載の器具。
- 前記フルオロポリマーが、多孔質である請求項1に記載の器具。
- 血管ステントの金属表面を、非晶質フルオロポリマーとフッ素化有機溶媒を含む溶液と接触させて、1〜100マイクロメートルの厚さを有するコーティングを設けることを含み、
前記非晶質フルオロポリマーが、テトラフルオロエチレン(TEF)および4,5−ジフルオロ−2,2−ビス(トリフルオロメチル)−1,3−ジオキソールを含む、血管ステントのコーティング方法であって、前記コーティングが放射線不透過剤をさらに含む、方法。 - 前記溶液が、均質である請求項15に記載の方法。
- 前記溶液のフッ素化有機溶媒が、FLUORINERT(登録商標)である請求項15に記載の方法。
- 前記溶液を濾過することをさらに含み、前記金属表面を濾過した溶液と接触させる請求項17に記載の方法。
- 前記ステントを前記溶液に浸漬またはスプレーして、塗布されたステントを提供することを包含する請求項15に記載の方法。
- 浸漬またはスプレー塗布されたステントを乾燥することをさらに含む請求項19に記載の方法。
- 前記溶液が、治療剤をさらに含む請求項15に記載の方法。
- 前記治療剤が、抗再狭窄剤、抗狭窄剤、抗増殖剤、免疫調節剤、抗血栓剤、抗酸化剤、エストロゲン、成長因子阻害剤、アンチセンスオリゴヌクレオチドまたはコラーゲン阻害剤である請求項21に記載の方法。
- 前記治療剤が、パクリタキセルである請求項22に記載の方法。
- 前記ステントの前記金属表面を、放射線不透過剤の添加により修飾された前記溶液と接触させて、第1のコーティングを有するステントを提供し、第1のコーティングを有するステントを、放射線不透過剤を有しない溶液と接触させることをさらに含む請求項15に記載の方法。
- 前記放射線不透過剤が、硫酸バリウム、金、タンタル、トリヨード安息香酸またはトリヨード安息香酸誘導体である請求項24に記載の方法。
- 前記ステントの前記金属表面を、塩の添加またはガスを放出し得る化合物の添加により修飾された前記溶液と接触させて、塗布ステントを提供し、該塗布ステントを水性媒体に接触させて、多孔質非晶質フルオロポリマーコーティングを提供することをさらに含む請求項15に記載の方法。
- 前記塩が、アルカリ金属塩である請求項26に記載の方法。
- 前記化合物が、分解により二酸化炭素を放出し得るものである請求項26に記載の方法。
- 前記化合物が、イソシアネート基を含む請求項28に記載の方法。
- 前記非晶質フルオロポリマーコーティングが、テトラフルオロエチレン(TEF)および60モル%〜90モル%の4,5−ジフルオロ−2,2−ビス(トリフルオロメチル)−1,3−ジオキソールを含む請求項15に記載の方法。
- 前記非晶質フルオロポリマーコーティングが、TEFLON AF 1600(登録商標)、またはTEFLON AF 2400(登録商標)である請求項15に記載の方法。
- 前記金属が、ステンレス鋼、チタン、ニッケル、金属合金、白金、金または生体適合性金属である請求項15に記載の方法。
- 前記金属が、チタンおよびニッケル合金、またはNITINOL(登録商標)である請求項32に記載の方法。
- 前記コーティングが、光学的に透明または薬品耐性である請求項15に記載の方法。
- 前記コーティングが、1〜20マイクロメートルの厚さを有する請求項15に記載の方法。
- 前記コーティングが、5〜15マイクロメートルの厚さを有する請求項35に記載の方法。
- 前記溶液が、0.1〜30重量%の前記非晶質フルオロポリマーを含む請求項15に記載の方法。
- 前記溶液が、1〜10重量%の前記非晶質フルオロポリマーを含む請求項37に記載の方法。
- 前記溶液が、5重量%の前記非晶質フルオロポリマーを含む請求項38に記載の方法。
- 前記溶液が、5重量%の治療剤をさらに含む請求項39に記載の方法。
- 前記治療剤が、パクリタキセルである請求項40に記載の方法。
- 前記コーティングが、0.01〜0.4の摩擦係数を有する請求項1に記載の器具。
- 前記コーティングが、0.01〜0.4の摩擦係数を有する請求項15に記載の方法。
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US54977004P | 2004-03-03 | 2004-03-03 | |
PCT/US2004/040941 WO2005061023A1 (en) | 2003-12-12 | 2004-12-07 | Implantable medical devices with fluorinated polymer coatings, and methods of coating thereof |
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EP (1) | EP1691858B1 (ja) |
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CA (1) | CA2541543C (ja) |
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EP1691858B1 (en) | 2017-05-17 |
MXPA06006470A (es) | 2006-08-23 |
CA2541543C (en) | 2012-05-29 |
US7476246B2 (en) | 2009-01-13 |
US20090062903A1 (en) | 2009-03-05 |
CA2541543A1 (en) | 2005-07-07 |
ES2635270T3 (es) | 2017-10-03 |
AU2004305558A1 (en) | 2005-07-07 |
EP1691858A1 (en) | 2006-08-23 |
US20050131527A1 (en) | 2005-06-16 |
WO2005061023A1 (en) | 2005-07-07 |
AU2004305558B2 (en) | 2010-01-21 |
US20110112629A1 (en) | 2011-05-12 |
US7892280B2 (en) | 2011-02-22 |
JP2007514481A (ja) | 2007-06-07 |
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