JP4850481B2 - 安定化された部分を有する拡張可能なステント - Google Patents
安定化された部分を有する拡張可能なステント Download PDFInfo
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- 206010002329 Aneurysm Diseases 0.000 claims description 78
- 239000012190 activator Substances 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 claims description 16
- 239000010839 body fluid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 10
- 235000010413 sodium alginate Nutrition 0.000 claims description 10
- 229940005550 sodium alginate Drugs 0.000 claims description 10
- 239000000661 sodium alginate Substances 0.000 claims description 10
- 238000012377 drug delivery Methods 0.000 claims description 9
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910001424 calcium ion Inorganic materials 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
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- 200000000007 Arterial disease Diseases 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
- A61F2002/077—Stent-grafts having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S623/00—Prosthesis, i.e. artificial body members, parts thereof, or aids and accessories therefor
- Y10S623/902—Method of implanting
- Y10S623/903—Blood vessel
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Gastroenterology & Hepatology (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
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Description
本発明は、動脈瘤を治療するための血管内ステント及び方法に関し、詳細には、貫通血管に近接した動脈瘤の頚部を塞ぐと共に貫通血管に血液が流れるように改変できるカバーステント及びその使用方法に関する。
膨張可能なステントは血管疾患の治療に広く用いられている。一般に、ステントは、血管形成術の後に狭窄した血管内に挿入して血管の再狭窄を防止する。膨張可能なステントは、動脈瘤カバーとしても用いることができる。ステントが動脈瘤に亘って配置されると、動脈瘤内への血液の流れが減少する。この動脈瘤内へ血流の減少により、動脈瘤内での血栓形成が促進され、最終的に動脈瘤のさらなる膨張や破裂の防止の助けとなる。
本発明の一態様に従えば、薄壁を有する小径の骨格管状部材の形をとる拡張可能なステントを含む動脈瘤治療装置が提供される。骨格管状部材の薄壁は、複数の相互連結されたストラット部材によって形成された複数のセルを含む。カバーが、拡張可能なステントの少なくとも一部の上に延在する。このカバーは、通常は体液に接触すると溶解するが、活性化剤が適用されると体液に対して不活性になる特性を有する。このステントは金属製骨格管状部材の形態をとり、カバーは、活性化剤に接触すると重合する材料を含むポリマーの形をとることができる。より具体的には、カバーは、アルギン酸ナトリウムの形をとり、活性化剤はカルシウムイオンを含む溶液の形をとることができる。カバーは、拡張可能なステントの外面に堆積されたアルギン酸ナトリウムの薄膜であるのが好ましい。
図1に、貫通血管などの分岐血管またはその近傍の血管で起こる脳内の動脈瘤などの動脈瘤を治療するために用いることができる膨張可能なカバーステント10が例示されている。本発明の好適な実施形態では、カバーステント10は、膨張可能な骨格ステント12及びその骨格ステント12の外面に設けられた独特の外側カバー14から構成されている。
(1)動脈瘤治療装置であって、
薄壁を有する小径の骨格管状部材の形態をとる拡張可能なステントであって、前記骨格管状部材の前記薄壁が、複数の相互連結されたストラット部材によって形成された複数のセルを含む、前記拡張可能なステントと、
前記拡張可能なステントの一部の上に延在するカバーであって、通常は体液に接触すると溶解するが、活性化剤が適用されて安定化すると体液に対して不活性になる特性を有する、前記カバーと、を含む、動脈瘤治療装置。
(2)実施態様(1)に記載の動脈瘤治療装置であって、
前記拡張可能なステントが金属製骨格管状部材の形をとり、前記カバーがポリマーから形成される、動脈瘤治療装置。
(3)実施態様(2)に記載の動脈瘤治療装置であって、
前記カバーが、前記活性化剤に接触すると重合する材料から形成される、動脈瘤治療装置。
(4)実施態様(3)に記載の動脈瘤治療装置であって、
前記カバーがアルギン酸ナトリウムの形をとり、前記活性化剤がカルシウムイオンを含む溶液の形をとる、動脈瘤治療装置。
(5)実施態様(4)に記載の動脈瘤治療装置であって、
前記カバーが、前記拡張可能なステントの外面に堆積されたアルギン酸ナトリウムの材料の薄膜の形をとる、動脈瘤治療装置。
通常は血液に接触すると溶解する材料から形成されるカバーが上部に堆積された骨格管状部材を含む拡張可能なカバーステントを用意するステップと、
患者の血管内に前記カバーステントを挿入するステップと、
前記カバーステントの前記カバーが前記血管の動脈瘤の頚部に整合して近接するまで前記カバーステントを前進させるステップと、
前記カバーの一部が前記動脈瘤の前記頚部に亘って延在するように前記骨格管状部材を拡張させるステップと、
前記カバーの前記部分に活性化剤を適用してその部分を安定させ、血液に接触しても溶解しないようにして前記動脈瘤を前記頚部に亘って塞ぐステップと、
前記カバーの残りの部分を血液に接触したままにして溶解し、近接する血管内に血液が流れるようにするステップと、を含む、方法。
(7)実施態様(6)に記載の動脈瘤を治療する方法であって、
前記カバーがアルギン酸ナトリウムであり、前記活性化剤がカルシウムイオンを含む溶液である、方法。
(8)動脈瘤を治療する方法であって、
患者の血管系に薬物送達カテーテルを挿入し、その薬物送達カテーテルの先端部を治療する動脈瘤内に送るステップと、
通常は血液に接触すると溶解する材料から形成されるカバーが上部に堆積された骨格管状部材を含む拡張可能なカバーステントを用意するステップと、
患者の血管内に前記カバーステントを挿入するステップと、
前記カバーステントの前記カバーが前記血管の動脈瘤の頚部に整合して近接するまで前記カバーステントを前進させるステップと、
前記カバーの一部が前記動脈瘤の前記頚部に亘って延在するように前記骨格管状部材を拡張させるステップと、
活性化剤を前記薬物送達カテーテルを介して前記動脈瘤内に注入し、前記活性化剤と前記カバーの前記部分を接触させて前記部分を安定させ、これにより前記部分が血液と接触しても溶解しないようにするステップと、
前記カバーの残りの部分を血液に接触したままにして溶解し、近接する血管内に血液が流れるようにするステップと、を含む、方法。
(9)実施態様(8)に記載の動脈瘤を治療する方法であって、
前記カバーがアルギン酸ナトリウムの形をとり、前記活性化剤がカルシウムイオンを含む溶液の形をとる、方法。
Claims (5)
- 動脈瘤を治療するためのシステムにおいて、
動脈瘤治療装置であって、
薄壁を有する小径の骨格管状部材の形態をとる拡張可能なステントであって、前記骨格管状部材の前記薄壁が、複数の相互連結されたストラット部材によって形成された複数のセルを含む、前記拡張可能なステントと、
前記拡張可能なステントの一部の上に延在するカバーであって、通常は体液に接触すると溶解するが、活性化剤が適用されて安定化すると体液に対して不活性になる特性を有する、前記カバーと、
を備える、動脈瘤治療装置と、
動脈瘤内に前記活性化剤を注入するための薬物送達カテーテルと、
を含み、
前記カバーがアルギン酸ナトリウムを含み、前記活性化剤がカルシウムイオンを含む溶液である、システム。 - 請求項1に記載のシステムであって、
前記拡張可能なステントが金属製骨格管状部材の形態をとる、システム。 - 請求項2に記載のシステムであって、
前記カバーが、前記拡張可能なステントの外面に配置されたアルギン酸ナトリウムの材料の薄膜の形態をとる、システム。 - 請求項1〜3のいずれかに記載のシステムであって、
前記拡張可能なステントは、拡張すると動脈瘤の頚部を亘って延在するように配置されるよう構成されている、システム。 - 請求項4に記載のシステムであって、
前記拡張可能なステントは、拡張すると動脈瘤に近接する分岐血管または貫通血管を塞ぐように配置されるよう構成されている、システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/975,842 US7156871B2 (en) | 2004-10-28 | 2004-10-28 | Expandable stent having a stabilized portion |
US10/975,842 | 2004-10-28 |
Publications (2)
Publication Number | Publication Date |
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JP2006122685A JP2006122685A (ja) | 2006-05-18 |
JP4850481B2 true JP4850481B2 (ja) | 2012-01-11 |
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Application Number | Title | Priority Date | Filing Date |
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JP2005313320A Expired - Fee Related JP4850481B2 (ja) | 2004-10-28 | 2005-10-27 | 安定化された部分を有する拡張可能なステント |
Country Status (6)
Country | Link |
---|---|
US (2) | US7156871B2 (ja) |
EP (1) | EP1652494B1 (ja) |
JP (1) | JP4850481B2 (ja) |
AT (1) | ATE418300T1 (ja) |
CA (1) | CA2524752C (ja) |
DE (1) | DE602005011914D1 (ja) |
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US20070067015A1 (en) | 2007-03-22 |
ATE418300T1 (de) | 2009-01-15 |
EP1652494B1 (en) | 2008-12-24 |
CA2524752A1 (en) | 2006-04-28 |
CA2524752C (en) | 2013-12-24 |
EP1652494A1 (en) | 2006-05-03 |
US7156871B2 (en) | 2007-01-02 |
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