JPH11226132A - 被覆ステント - Google Patents
被覆ステントInfo
- Publication number
- JPH11226132A JPH11226132A JP32206798A JP32206798A JPH11226132A JP H11226132 A JPH11226132 A JP H11226132A JP 32206798 A JP32206798 A JP 32206798A JP 32206798 A JP32206798 A JP 32206798A JP H11226132 A JPH11226132 A JP H11226132A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- stent
- tubular member
- thickness
- coated stent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 93
- 239000011248 coating agent Substances 0.000 title claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 3
- 238000002594 fluoroscopy Methods 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000008280 blood Substances 0.000 abstract description 2
- 210000004369 blood Anatomy 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract 2
- 238000000866 electrolytic etching Methods 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 241000274177 Juniperus sabina Species 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000002583 angiography Methods 0.000 description 1
- 238000002399 angioplasty Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 210000005095 gastrointestinal system Anatomy 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 235000001520 savin Nutrition 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- A61F2/91—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
-
- 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
- A61F2/91—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
-
- 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
- A61L31/082—Inorganic materials
-
- 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
- A61F2002/065—Y-shaped blood vessels
-
- 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
- A61F2002/065—Y-shaped blood vessels
- A61F2002/067—Y-shaped blood vessels modular
-
- 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
- A61F2/91—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
- A61F2002/91541—Adjacent bands are arranged out of phase
-
- 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
- A61F2/91—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91558—Adjacent bands being connected to each other connected peak to peak
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/001—Figure-8-shaped, e.g. hourglass-shaped
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0028—Shapes in the form of latin or greek characters
- A61F2230/0054—V-shaped
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Pulmonology (AREA)
- Gastroenterology & Hepatology (AREA)
- Inorganic Chemistry (AREA)
- Surgery (AREA)
- Epidemiology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Abstract
の支柱を備える管状部材という形態のステントと、管状
部材上の第1被覆とを含む。第1被覆は管状部材をほぼ
覆い、厚さがほぼ均一である。第1被覆は、第1材料よ
り放射線不透過性が高い第2材料を備える。別の実施例
では、ステントはさらに、管状部材と第1被覆との間の
第2被覆を備え、第2被覆は管状部材の一部のみを覆
う。さらに別の実施例では、ステントは、二股の身体内
腔中に配置するため、被覆二股ステントである。
Description
するステント、特にこのようなステントの放射線不透過
性の最適化に関する。
他の身体の内腔の内部に刺入してこのような内腔を広げ
たり、これを開いたままにするのに役立てたりする管状
構造である。通常、ステントは圧縮した形状にある間に
身体に挿入し、その後、内腔の目標位置に配置されたら
最終的直径へと拡張する。ステントは、バルーンの血管
形成の後、またはその代わりに使用して、狭窄を治療
し、その後の再狭窄を防止することが多く、より一般的
には、血管系、胆管系、泌尿生殖器系、胃腸系、呼吸器
系および他の系など、幾つかの管状身体導管のいずれか
の修復に使用することができる。線材で形成されたステ
ントの分野における例証的な特許には、例えばPichukの
米国特許第5,019,090号、Towerの第5,161,547号、Savin
その他の第4,950,227号、Fontaineの第5,314,472号、Wi
ktorの第4,886,062号および第4.969,458号、およびHill
steadの第4,856,516号があり、それぞれ参照により本明
細書に組み込まれる。例えば切断した素材金属で形成さ
れるステントは、Palmazの米国特許第4,733,665号、Ros
enbluthの第4,762,128号、PalmazおよびSchatzの第5,10
2,417号、Schatzの第5,195,984号、Meadoxの第WO 91 FR
013820号、およびMedinolの第WO 96 03092号があり、そ
れぞれ参照により本明細書に組み込まれる。二股のステ
ントは、MacGregorの米国特許第4,994,071号、および1
996年5月3日に出願された共願の米国特許出願第08
/642,297号に記載され、それぞれ参照により本明細書に
組み込まれる。
ためには、所望の身体内腔の目標位置に正確に配置する
ことが必要不可欠である。これは、例えば複数のステン
ト刺入が必要で、重複したステントが非常に長い領域ま
たは二股の血管をカバーする場合に、特に真実である。
これらのケースや他のケースでは、往々にして、身体中
に配置する間とステントを拡張後の両方で、ステントを
目視観察することが必要である。このような視覚化のた
めに様々なアプローチが試みられてきた。例えば、ステ
ントをタンタルやプラチナなどの放射線不透過性を有す
る(つまりX線、ガンマ線または他の放射性エネルギー
を通過させない)金属から作製したものもあった。しか
し、このようなステントの潜在的な問題の一つは、放射
線不透過性とステントの強度との有用なバランスは、達
成するのが不可能ではないまでも困難であるということ
である。例えば、適切な強度を有するこのようなステン
トを形成するためには、大抵、ステントが過剰に放射線
不透過性を有するよう、ステントの直径を大きくする必
要がある。したがって、このようなステントの蛍光透視
法では、展開した後、刺入した血管の血管造影の詳細が
隠れ、組織の脱出や増殖などの問題を評価するのが困難
になることがある。
つの技術は、所定の位置で放射線不透過性のマーカーを
ステントに接合することである。しかし、ステントとマ
ーカー材料(例えばそれぞれステンレス鋼と金)を接合
すると、接合部電位や血液の乱流を生じることがあり、
したがって凝固などの血栓事象を促進してしまう。した
がって、マーカーのサイズを最小限に抑えてこの問題を
回避すると、蛍光透視装置の可視性が非常に下がり、可
視性が方向によって変化することになる。
別の技術は、単にこのようなステントの厚さを増し、そ
れによって放射線不透過性を高めることである。しか
し、過剰に太いステントの支柱は、実際に血流の障害を
生じる。また、太い支柱を有するステントには設計に制
限があり、その結果、支柱間に大きいギャップが生じ、
周囲の内腔の支持が低下することが多い。さらに、過剰
に太いステントの支柱は、ステントの可撓性に悪影響を
与える可能性がある。
を犠牲にすることなく、ステントの放射線不透過性を改
善する必要がある。放射線不透過性材料でのステントの
被覆が、Fishellその他の米国特許第5,607,442号に記載
されている。その特許によると、開示された放射性透過
性被覆は、半径方向のステント部材と比較して縦方向の
ステント部材がはるかに厚く、したがって蛍光透視法の
間に、縦方向のステント部材しか見えない。
と機械的特性を最適化したステントを提供する。
支柱を備えた管状部材と、管状部材上の第1被覆とを備
えるステントを含む。第1被覆は管状部材をほぼ覆い、
厚さがほぼ均一である。第1被覆は、支柱を構成する第
1材料より放射線不透過性が高い第2材料で構成され
る。
に管状部材と第1被覆との間に配置された第2被覆を備
え、第2被覆は管状部材の一部しか覆わない。ステント
を蛍光透視装置で観察すると、第2被覆が存在する部分
が、第1被覆しか存在しない部分より暗く見える。
は幹内腔と枝内腔とに二股に分かれた身体内腔に配置す
るため、被覆した二股ステントである。ステントは、幹
内腔と枝内腔に配置するため、それぞれ幹脚部と枝脚部
を有する。この実施例では、蛍光透視装置でステントを
観察したときに、枝脚部が幹脚部より暗く見えるよう、
多層の放射線不透過性材料でステントを被覆する。
を犠牲にせずに、ステントの最適な放射線不透過性を提
供する。本発明によるステントは、所望の機械的特性
(例えば強度)を有する母材で作成され、ステントに最
適な放射線不透過性を与える材料で被覆される。本発明
のステントの放射線不透過性は、放射線透視手順の間
に、ステントが完全に見えるが、血管造影の詳細が隠蔽
されるほど放射線不透過性が高くないよう最適化され
る。したがって、本発明は、母材の所望の機械的特性
と、被覆材料の所望の放射線不透過性との両方を有する
ステントを提供する。本発明のステントは、単純で再現
可能な技術により製造されるという追加の利点も有す
る。
0は、図1ないし図2で示すような支柱110を備える
管状部材101である。本明細書では、「支柱」という
用語は、線材、切断した素材または他の材料から作成し
た半径方向、縦方向または他の部材のような、ステント
の任意の構造的部材を意味するものとする。支柱110
は、例えば圧縮した形状にある間に身体に入れられる能
力、目標位置に配置されたら拡張できる能力、反動に抵
抗する能力、ステントの寿命の間、身体内腔を開いたま
まにしておく能力など、その機械的特性に従って選択さ
れた第1材料を備える。ステント110の典型的な例証
的材料は、ステンレス鋼およびニチノールである。ステ
ント100はさらに、放射線不透過性に従って選択され
た第2材料の第1被覆102を備える。被覆102は、
管状部材101全体を覆い、その結果、第1材料と第2
材料との交差部がステントの外部に露出しない。第1材
料と第2材料との交差部がステントの外部に露出しない
ことにより、血液の接合部電位が生じてステントの電解
腐食を招くような危険がなくなる。図2は、ステント1
00の典型的な支柱110にある被覆102の断面図を
示す。図2は、支柱110および被覆102をほぼ正方
形の断面形状で示しているが、これらの要素の一方また
は両方の実際の断面形状は、円形、長円形、長方形、ま
たは幾つかの不規則な形状のいずれかなど、所望の形状
または適切な形状である。
メッキ、イオン・ビーム補助メッキ、物理蒸着、化学蒸
着、電子ビーム蒸着、高温浸漬、または他の適切なスパ
ッタリングまたは蒸着法など、任意の適切な技術で管状
部材101に付着させる。被覆102は、例えば金、プ
ラチナ、銀およびタンタルなど、任意の適切な放射線不
透過性材料を備える。
ある。被覆が厚すぎると、放射線不透過性が過剰なステ
ントになり、したがってその後の蛍光透視法の間に血管
造影の細部が隠蔽されてしまう。また、ステントの剛性
は往々にして被覆の厚さとともに上昇し、したがって被
覆が厚すぎると、身体内腔に配置するためにステントを
拡張するのが困難になる。他方で、放射線不透過性の被
覆が薄すぎると、蛍光透視法の間にきちんと見えない。
管状部材101の材料および形状、および被覆102の
材料に応じて、被覆102の厚さを最適化して、放射性
不透過性と強度との最適なバランスを提供する。しか
し、概して被覆102は下にある支柱の太さの約1〜2
0%であることが好ましく、約5〜15%であるとさら
に好ましい。本発明のすべての実施例で、被覆102
は、蛍光透視法の間に全体が見えるよう、ステント全体
に適用される。したがって、ステントに沿った任意の位
置で最適状態でない拡張があれば、それが見え、完全な
円形の拡張からずれると、気づくことができる。
るが、本発明のすべての実施例には、第WO 03092号およ
び1995年5月31日に出願された共願の米国特許出
願第08/457,354号に記載されたパターン状形状も好まし
い。このような形状(その拡大図を図3および図4に示
す)の例として、ステント100は、互いに絡み合う複
数の2本直交線蛇行パターンに形成された側部を有す
る。本明細書では「蛇行パターン」という用語は、中心
線を中心とした周期的なパターンを言うのに使用し、
「直交蛇行パターン」とは、互いに直交する中心線を有
するパターンである。
選択で2つの蛇行パターン11および12を含む。蛇行
パターン11は、垂直の中心線9を有する垂直シヌソイ
ドである。蛇行パターン11は周期ごとに2つのループ
14および16を有して、ループ14は右側に開き、ル
ープ16は左側に開く。ループ14および16は共通の
部材15および17を共有し、部材15は1つのループ
15から後続のループ16に接続し、部材17は1つの
ループ16から後続のループ14に接続する。蛇行パタ
ーン12は、水平の中心線13を有する水平パターンで
ある。蛇行パターン12も18および20と分類された
ループを有し、これは同方向または反対方向に向けるこ
とができる。図3に直交蛇行パターン11および12と
ともに示したステントの形状は、拡張を容易にする高度
のステントの可撓性を提供しながら、ステントが拡張さ
れると、剛性が高くなる。図4は、本発明の最も好まし
いステント形状の一つのセルの詳細図を示す。
実施例では、ステント200は、ステント200の支柱
110と第1被覆102との間に与えられた第2被覆2
02を含む。しかし、第1被覆102と区別して、第2
被覆202はステント200の1つまたは複数の部分し
か覆わず、したがって蛍光透視法の間にはステント20
0の隔離された領域が最もよく見える。例えば、第2被
覆202は図5に示すようにステント100の近位端1
11および遠位端112の一方または両方に加えられ
る。しかし図1ないし図2で示す実施例と同様、第1被
覆102は図5ないし図7に示すステント200全体を
覆う。図6および図7は、それぞれ第2被覆202を加
えた場合および加えない場合のステント100の支柱1
10の断面図を示す。このような隔離したマーキング
は、例えば重複する長さが重要である複数のステント刺
入の場合、または例えば口に対するステント端部の位置
が重要である口へのステント刺入の場合のように、ステ
ント端部を正確に配置するのに有用である。
びタンタルなどの適切な放射線不透過性材料を備え、第
1被覆102と同じか異なる材料でよい。第2被覆20
2は、第1被覆102の付着について述べたような任意
の適切な技術でステント200に付着させる。第2被覆
202は、例えば第2被覆202の付着中にマスキング
するか、第2被覆202を付着後に別個にエッチングす
ることにより、管状部材101の1つまたは複数の部分
にのみ付着させる。本明細書では被覆202を「第2」
被覆と述べているが、第1被覆102の付着前にステン
ト200に付着させることが理解される。
第2被覆202が存在しない部分と比較した時に、第2
被覆202が存在する部分で放射線不透過性が高くなる
ような厚さを有する。第2被覆202はステント200
の1つまたは複数の部分にしか付着させないので、ステ
ント200の拡張に対する抵抗に有意の影響を与えた
り、蛍光透視法の間に動脈の細部の可視性に影響を与え
ることなく、厚く付着させることができる。第1被覆1
02と同様、第2被覆202の厚さは、ステントの放射
線不透過性と他の特性との所望のバランスをとるよう最
適化される。しかし、概して第2被覆202は通常、第
1被覆102と同じか、それより厚い。第1および第2
被覆102、202の両方を付着させる場合、第1およ
び第2被覆102、202の厚さは、それぞれ下にある
ステント支柱の厚さの約1〜5%および5〜15%であ
ることが概ね好ましい。さらに、第1と第2被覆10
2、202を組み合わせた厚さは、通常、下にあるステ
ント支柱の厚さの25%を超えない。図示の例のよう
に、第2被覆202は、直径100ミクロンの支柱を有
するステント上に、約10ミクロンの厚さに付着させ
る。次に、第1被覆102を約1ミクロンの厚さに付着
させる。
は図8に示すように二股ステントである。ステント30
0は、二股内腔の幹および枝内腔に配置するため、それ
ぞれ管状の幹脚部と枝脚部310、311へと二股に分
かれた管状部材301を備える。この実施例では、ステ
ント全体に図1、図2および図5、図6、図7で示す実
施例で述べたように、第1被覆102を塗布する。しか
し枝脚部311は、ステント300を蛍光透視法で観察
した時に、枝脚部311が幹脚部310より暗く見える
よう、管状部材301と第1被覆102との間に配置さ
れた第2被覆202を含む。したがって、ステント30
0の支柱の断面図は、枝および幹脚部311、310に
ついてそれぞれ図6および図7のように見える。このよ
うな形状は、枝脚部311を枝内腔と位置合わせし、そ
れに挿入するのに有用である。
を別個に二股内腔に入れるよう、枝脚部311を管状部
材301の枝口312に選択的に挿入することができ
る。この場合、管状部材301には、図9で示すような
枝口312を設ける。管状部材301を二股内腔に入れ
ると、枝口312が対応する枝内腔と位置合わせされ
る。ステント300の管状部材部分301をその後で拡
張して、その位置を処理する内腔中に固定し、枝脚部3
11の一部が枝内腔中に位置するよう、枝口312を介
して枝脚部311を入れる。枝脚部311をその後、図
10に示すように、その外面が枝口312を規定する管
状部材301の部分と噛み合い、枝脚部311を枝内腔
および管状部材301中に固定するのに十分な量だけ拡
張する。本発明のこの実施例では、枝口312を囲む領
域313は、蛍光透視法の間にこの領域313が最もよ
く見えるよう、第1および第2被覆102、202を両
方とも含む。つまり、ステント300の支柱110の断
面図は、領域313では図6のように見え、その他は図
7のように見える。このような形状は、その後、枝脚部
310を枝内腔に容易に挿入できるよう、枝口312を
枝内腔と位置合わせするのに有用である。
牲にすることなく、最適な放射線不透過性を有するステ
ントを提供する。当業者には、本明細書で述べ、図示し
た実施例に対して種々の変形ができることが認識され
る。このような変形は、添付の請求の範囲の精神および
範囲の対象となるものとする。
ントを示す。
す。
の最も好ましい形状を示す。
ターン状ステントを示す。
図5のステントの典型的支柱の断面図である。
る、図5のステントの典型的支柱の断面図である。
を示す。
を示す。
トを示す。
Claims (18)
- 【請求項1】 身体内腔中で展開するステントであっ
て、 第1材料を備える支柱を備える管状部材を備え、前記管
状部材は、近位端および遠位端およびそれを通る縦方向
のボアを有し、さらに、 前記管状部材上の第1被覆を備え、前記第1被覆は前記
管状部材をほぼ覆い、厚さがほぼ均一で、前記第1被覆
は第2材料を備え、 前記第2材料が前記第1材料より放射線不透過性が高い
被覆ステント。 - 【請求項2】 前記第1被覆の厚さが、下にある支柱の
厚さの約1〜20%である、請求項1に記載の被覆ステ
ント。 - 【請求項3】 第1被覆の厚さが、下にある支柱の厚さ
の約5〜15%である、請求項2に記載の被覆ステン
ト。 - 【請求項4】 前記第1被覆は、厚さが約0.5〜20
ミクロンである、請求項1に記載の被覆ステント。 - 【請求項5】 前記第1材料が、ステンレス鋼とニチノ
ールで構成されたグループから選択される、請求項1に
記載の被覆ステント。 - 【請求項6】 前記第2材料が金、プラチナ、銀および
タンタルで構成されたグループから選択される、請求項
1に記載の被覆ステント。 - 【請求項7】 さらに、前記管状部材と前記第1被覆と
の間に配置された第2被覆を備え、前記第2被覆は前記
管状部材の一部のみを覆う、請求項1に記載の被覆ステ
ント。 - 【請求項8】 前記第2被覆が、前記管状部材の前記近
位端または前記遠位端に配置される、請求項7に記載の
被覆ステント。 - 【請求項9】 ステントを蛍光透視法で観察すると、前
記ステントは、前記第2被覆が存在する部分が、前記第
2被覆が存在しない部分より暗く見える、請求項7に記
載の被覆ステント。 - 【請求項10】 前記第2被覆の厚さが、下にある支柱
の厚さの約1〜20%である、請求項7に記載の被覆ス
テント。 - 【請求項11】 前記第2被覆の厚さが、下にある支柱
の厚さの約5〜15%である、請求項10に記載の被覆
ステント。 - 【請求項12】 前記第2被覆は、厚さが約0.5〜2
0ミクロンである、請求項7に記載の被覆ステント。 - 【請求項13】 前記第2被覆は、厚さが約5〜15ミ
クロンである、請求項12に記載の被覆ステント。 - 【請求項14】 前記第1被覆は、厚さが約1ミクロン
である、請求項12に記載の被覆ステント。 - 【請求項15】 前記第2被覆が、金、プラチナ、銀お
よびタンタルで構成されたグループから選択される材料
を備える、請求項7に記載の被覆ステント。 - 【請求項16】 前記管状部材が、二股内腔のそれぞれ
幹および枝内腔に配置するため、幹脚部と枝脚部へと二
股に分かれる、請求項1に記載の被覆ステント。 - 【請求項17】 さらに、前記管状部材と前記第1被覆
との間にある第2被覆を備え、前記第2被覆が前記枝脚
部のみを覆う、請求項16に記載の被覆ステント。 - 【請求項18】 前記管状部材が枝口を含み、 前記枝脚部を前記管状部材中に選択的に配置することが
でき、 前記枝口に隣接する前記管状部材の領域が、前記管状部
材と前記第1被覆との間に第2被覆を含む、請求項16
に記載の被覆ステント。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96957697A | 1997-11-13 | 1997-11-13 | |
| US08/969,576 | 1997-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11226132A true JPH11226132A (ja) | 1999-08-24 |
| JP3640007B2 JP3640007B2 (ja) | 2005-04-20 |
Family
ID=25515691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32206798A Expired - Fee Related JP3640007B2 (ja) | 1997-11-13 | 1998-11-12 | 被覆ステント |
Country Status (23)
| Country | Link |
|---|---|
| US (2) | US6315794B1 (ja) |
| EP (1) | EP0916317B1 (ja) |
| JP (1) | JP3640007B2 (ja) |
| KR (1) | KR100309485B1 (ja) |
| CN (1) | CN1217216A (ja) |
| AR (1) | AR015161A1 (ja) |
| AT (1) | ATE386476T1 (ja) |
| AU (2) | AU8882998A (ja) |
| BR (1) | BR9803598A (ja) |
| CA (1) | CA2245805C (ja) |
| CZ (1) | CZ335598A3 (ja) |
| DE (2) | DE19846013A1 (ja) |
| EE (1) | EE03801B1 (ja) |
| GB (1) | GB2331246B (ja) |
| IL (1) | IL125897A (ja) |
| NO (1) | NO311781B1 (ja) |
| NZ (1) | NZ331532A (ja) |
| PL (1) | PL328338A1 (ja) |
| RU (1) | RU2211684C2 (ja) |
| SG (1) | SG67545A1 (ja) |
| SK (1) | SK145898A3 (ja) |
| UA (1) | UA53646C2 (ja) |
| WO (1) | WO1999025272A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002102358A (ja) * | 2000-09-22 | 2002-04-09 | Cordis Corp | 最適強度と放射線不透過性をもつステント |
| JP2002263194A (ja) * | 2001-03-13 | 2002-09-17 | Inprest Co Ltd | ステント |
| JP2005516731A (ja) * | 2002-02-13 | 2005-06-09 | ダンフォス アクチーセルスカブ | 脊柱用インプラントおよびその製造方法 |
| JP2023540220A (ja) * | 2020-08-25 | 2023-09-22 | シファメド・ホールディングス・エルエルシー | 調整式心房間分流器と関連のシステム及び方法 |
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- 1998-08-26 AU AU81929/98A patent/AU757255B2/en not_active Ceased
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- 1998-09-07 KR KR1019980036711A patent/KR100309485B1/ko not_active Expired - Fee Related
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| JP2002102358A (ja) * | 2000-09-22 | 2002-04-09 | Cordis Corp | 最適強度と放射線不透過性をもつステント |
| JP2004522463A (ja) * | 2000-09-22 | 2004-07-29 | コーディス・コーポレイション | ステント |
| JP2002263194A (ja) * | 2001-03-13 | 2002-09-17 | Inprest Co Ltd | ステント |
| JP2005516731A (ja) * | 2002-02-13 | 2005-06-09 | ダンフォス アクチーセルスカブ | 脊柱用インプラントおよびその製造方法 |
| JP2023540220A (ja) * | 2020-08-25 | 2023-09-22 | シファメド・ホールディングス・エルエルシー | 調整式心房間分流器と関連のシステム及び方法 |
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