KR0170219B1 - Opening stent - Google Patents

Opening stent Download PDF

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Publication number
KR0170219B1
KR0170219B1 KR1019960039092A KR19960039092A KR0170219B1 KR 0170219 B1 KR0170219 B1 KR 0170219B1 KR 1019960039092 A KR1019960039092 A KR 1019960039092A KR 19960039092 A KR19960039092 A KR 19960039092A KR 0170219 B1 KR0170219 B1 KR 0170219B1
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South Korea
Prior art keywords
stent
open
cover means
lumen
unit structure
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KR1019960039092A
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Korean (ko)
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KR19980020582A (en
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서수원
김인영
주인욱
도영수
주성욱
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김광호
삼성전자주식회사
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Priority to KR1019960039092A priority Critical patent/KR0170219B1/en
Priority to EP97303517A priority patent/EP0808614B1/en
Priority to DE69719237T priority patent/DE69719237T2/en
Priority to CNB971137749A priority patent/CN1148232C/en
Priority to JP13406097A priority patent/JP3798507B2/en
Priority to US08/861,818 priority patent/US6027525A/en
Publication of KR19980020582A publication Critical patent/KR19980020582A/en
Application granted granted Critical
Publication of KR0170219B1 publication Critical patent/KR0170219B1/en

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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
    • A61F2/82—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
    • 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
    • A61F2/89—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
    • 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
    • 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
    • A61F2002/044—Oesophagi or esophagi or gullets
    • 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
    • A61F2002/075—Stent-grafts the stent being loosely attached to the graft material, e.g. by stitching
    • 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
    • A61F2002/828—Means for connecting a plurality of stents allowing flexibility of the whole 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0069—Three-dimensional shapes cylindrical

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Cardiology (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Pulmonology (AREA)
  • Surgery (AREA)
  • Epidemiology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

적어도 2개 이상의 지그재그 단위 구조체와, 단위 구조체를 커버하기 위한 커버수단을 포함하는 스텐트에 있어서, 각각의 단위 구조체가 개방부를 가지는 개방형이며, 이들을 서로 연결하는 별도의 수단 없이도 커버수단 자체가 동시에 연결수단으로서의 역할을 하게 함으로써 원통형 스텐트를 형성할 수 있도록 하여, 우수한 확장력을 가지면서도, 굽어져 있는 내강에 삽입시 유연성을 향상시키고, 더불어 제조가 보다 쉽도록 하여 생산성을 향상시킬 수 있으며, 2중금속 산화의 발생을 방지하여 인체가 중금속에 노출되는 것을 방지한 개방형 스텐트.A stent comprising at least two or more zig-zag unit structures and cover means for covering the unit structures, wherein each unit structure is an open type having an opening, and the cover means itself are connected at the same time without any additional means for connecting them. It can be used to form a cylindrical stent, while having excellent expansion force, while improving flexibility when inserting into a bent lumen, and making it easier to manufacture, and improving productivity. An open stent that prevents the body from being exposed to heavy metals.

Description

개방형 스텐트Open stent

제1도는 본 발명의 실시예에 따른 개방형 스텐트를 나타내는 사시도이며,1 is a perspective view showing an open stent according to an embodiment of the present invention,

제2도는 본 발명의 실시예에 따른 개방형 스텐트가 굽어져 있는 내강에 삽입되어 있는 것을 나타내는 도면이고,2 is a view showing that the open stent according to the embodiment of the present invention is inserted into the bent lumen,

제3도는 본 발명의 또다른 실시예에 따른 개방형 스텐트를 나타내는 사시도이며,3 is a perspective view showing an open stent according to another embodiment of the present invention,

제4도는 종래의 실시예에 따른 스텐트를 나타내는 개략적인 도면이다.4 is a schematic diagram showing a stent according to a conventional embodiment.

본 발명은 개방형 스텐트에 관한 것으로서, 보다 상세하게는, 2중금속 산화의 발생을 방지하여 인체에 무해하고, 유연성이 우수하며, 제조하기가 쉬운 개방형 스텐트에 관한 것이다.The present invention relates to an open stent, and more particularly, to an open stent that is harmless to the human body by preventing the occurrence of double metal oxidation, excellent in flexibility, and easy to manufacture.

의료용 스텐트는 주로 인체에 사용되는 것으로 질병, 외상, 수술등으로 인하여 좁아진 장기나 혈관 등의 내강을 넓히기 위한 것이다. 따라서, 좁아진 내강을 확장시키고 그 형상을 유지하도록 설계되어야 한다. 또한, 스텐트를 장착시킬 인체내 부위(혈관, 식도 등의 부위)에 따라 스텐트 삽입장치의 직경이 제한되므로, 수축시 그 직경이 작은 것이 바람직하다. 그리고, 굽어져 있는 내강에 삽입되는 스텐트의 경우에는 길이방향의 유연성이 요구된다.Medical stent is mainly used for the human body is to widen the lumen of the organ or blood vessel narrowed due to diseases, trauma, surgery, and the like. Therefore, it must be designed to expand and maintain the narrowed lumen. In addition, since the diameter of the stent insertion device is limited depending on the part of the human body (site of blood vessel, esophagus, etc.) to which the stent is to be mounted, it is preferable that the diameter of the stent is small during contraction. In the case of a stent inserted into a curved lumen, longitudinal flexibility is required.

이러한 스텐트는 전체적인 형상이 원통형 구조체인 것이 일반적이고, 이를 크게 구분하면 하나는 자체가 소정의 탄성을 가지고 있어 외력을 가하여 수축시킬 수 있고 이 외력을 제거하면 자체 팽창하는 것과, 다른 하나는 소성체로 이루어져 수축된 상태에서 외력을 가하여 팽창시키면 자체의 소성으로 인하여 외력을 제거하여도 팽창된 상태를 그대로 유지하는 것으로 나눌 수 있다.The stent is generally a cylindrical structure, the general shape is largely divided into one has its own elasticity can be contracted by applying an external force, and when the external force is removed, and the other is made of a plastic body When expanded by applying an external force in the contracted state can be divided into maintaining the expanded state even if the external force is removed due to its plasticity.

지그재그 타입 스텐트는 상기 설명중 전자에 속하는 것으로서, 좁아진 내강을 확장시키는 확장력이 매우 우수하며, 인체내 삽입을 위하여 수축시켰을 때 비교적 작은 직경을 가진다는 장점을 가지고 있다.Zigzag-type stents belong to the former in the above description, and have an excellent expansion force for expanding the narrowed lumen and have a relatively small diameter when contracted for insertion into the human body.

제4도는 이와 같은 종래 지그재그 타입 스텐트를 나타낸 도면으로서, 도시된 바와 같이, 외력을 가하여 수축시킬 수 있으며, 각각 소정의 간격으로 배치되는 다수개의 지그재그 고리형 탄성체(101)와 , 상기 각각의 탄성체(101)를 엮어 주는 고리끈(102)과 상기 탄성체(101)와 고리끈(102)을 동시에 피복하는 폴리에틸렌 재질의 피복부(103)를 포함하고 있다.4 is a view showing such a conventional zigzag type stent, and as shown, it can be contracted by applying an external force, a plurality of zig-zag annular elastic body 101 and each arranged at a predetermined interval, and each of the elastic bodies ( A ring strap 102 for weaving 101 and a cover portion 103 made of polyethylene that simultaneously covers the elastic body 101 and the ring strap 102 are included.

이 스텐트의 경우, 굽어져 있는 내강에 삽입시 스텐트가 접혀져 통로는 막는 것을 방지하기 위해서는, 탄성체(101) 사이의 슬립이 필요한데, 탄성체(101)를 고리끈(102)으로 엮어 함께 피복부(103)로 피복함으로써 탄성체(101) 사이의 슬립을 막게 됨으로써, 굽어져 있는 내강에 적용시 꺾여져 통로를 막게 되는 문제점을 가지고 있다.In the case of this stent, slip between the elastic bodies 101 is required to prevent the stent from folding and blocking the passage when inserted into the bent lumen. The cover between the elastic bodies 101 is prevented by being coated with (), which causes bending to be blocked when applied to the bent lumen, thereby blocking the passage.

또한, 탄성체(10)를 고리형으로 형성하기 위해서는, 납땜을 하는 것이 보통인데, 이로 인하여 인체 내에서 2중금속 산화가 발생할 수 있고 인체가 중금속에 노출되는 위험이 있다.In addition, in order to form the elastic body 10 in a ring shape, it is common to solder, which may cause a double metal oxidation in the human body and there is a risk that the human body is exposed to heavy metals.

따라서, 본 발명의 목적은 우수한 확장력을 가지면서도, 굽어져 있는 내강에 삽입시 상기와 같은 문제점을 발생시키지 않도록 유연성을 향상시키고, 더불어 제조가 보다 쉽도록 하여 생산성을 향상시킬 수 있는 스텐트를 제공함에 있다.Accordingly, an object of the present invention is to provide a stent that has excellent expansion force and improves flexibility so as not to cause the above problems when inserted into a bent lumen, and also facilitates manufacturing to improve productivity. have.

본 발명의 다른 목적은 2중금속 산화의 발생을 방지하여 인체가 중금속에 노출되는 것을 방지한 스텐트를 제공함에 있다.Another object of the present invention is to provide a stent that prevents the human body from being exposed to heavy metals by preventing the occurrence of double metal oxidation.

상기와 같은 문제점을 해결하기 위하여, 본 발명은 적어도 2개 이상의 지그재그 단위 구조체와, 상기 단위 구조체를 커버하기 위한 커버수단을 포함하는 스텐트에 있어서, 상기 각각의 단위 구조체가 개방부를 가지는 개방형이며, 이들을 서로 연결하는 별도의 수단 없이도 상기 커버수단 자체가 동시에 연결수단으로서의 역할을 하게 함으로써 원통형 스텐트를 형성할 수 있는 개방형 스텐트를 제공한다.In order to solve the above problems, the present invention is a stent comprising at least two or more zig-zag unit structure, and cover means for covering the unit structure, each unit structure is an open type having an opening, By providing the cover stent itself as a connecting means at the same time without a separate means for connecting to each other to provide an open stent capable of forming a cylindrical stent.

따라서, 확장력이 우수한 개방형 지그재그 탄성체로서 좁아진 내강을 충분히 확장할 수 있으면서도, 각각의 탄성체를 피복부만으로 연결함으로써 굽어져 있는 내강에서도 그 내면을 심하게 압박함이 없이 삽입 장착되어 있을 수 있으며, 단위 구조체가 개방형(C형)이므로, 폐쇄형(O형)보다 제조하기가 편리하여 생산성을 향상시킬 수 있다.Therefore, the open zigzag elastic body having excellent expansion force can sufficiently expand the narrowed lumen, and can be inserted and mounted even in the bent lumen without severely pressing the inner surface by connecting each elastic body only with a covering part. Since it is open type (C type), it is more convenient to manufacture than closed type (O type), and productivity can be improved.

또한, 탄성체의 연결함에 있어 납과 같은 다른 금속을 사용하지 않음으로써, 2중금속 산화를 방지하여 인체가 중금속에 노출되는 것을 방지할 수 있다.In addition, by not using other metals such as lead in the connection of the elastic body, it is possible to prevent the oxidation of the double metal to prevent the human body is exposed to heavy metals.

본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

제1도와 제2도를 참조하면, 본 발명의 제1실시예에 따른 개방형 스텐트, 적어도 2개 이상의 지그재그 단위 구조체(1)와, 상기 단위 구조체(1)를 커버하기 위한 커버수단(3)을 포함하며, 상기 각각의 단위 구조체(1)가 개방형이며, 이들을 서로 연결하는 별도의 수단 없이도 상기 커버수단(3) 자체가 동시에 연결수단(3)으로서의 역할을 하게 함으로써 원통형상의 개방형 스텐트를 형성할 수 있다.1 and 2, an open stent according to a first embodiment of the present invention, at least two zigzag unit structures 1, and cover means 3 for covering the unit structures 1 It is possible to form a cylindrical open stent by allowing each of the unit structures 1 to be open and having the cover means 3 itself serve as a connecting means 3 at the same time without a separate means for connecting them to each other. have.

상기 지그재그 단위 구조체(1)는 외력을 가하면 수축될 수 있어 스텐트 삽입장치의 삽입관에 용이하게 삽입될 수 있으며, 삽입관으로부터 분리되어 좁아져 있는 내강에 안착되면 확장하여 내강을 넓힐 수 있게 하는데, 그의 형상은 전체적으로 고리형이나, 폐쇄된 고리형(O형)이 아니라, 일측이 개방되어 개방부(5)를 이루고 있는 개방된 고리형(C형)이다.The zigzag unit structure (1) can be contracted by applying an external force can be easily inserted into the insertion tube of the stent insertion device, it is possible to expand and widen the lumen when seated in the narrow lumen separated from the insertion tube, Its shape is generally annular, but not closed annular (O type), but is an open annular (C type) in which one side is opened to form the opening part 5.

이와 같이 상기 지그재그 단위 구조체(1)가 일측에 개방부(5)가 형성된 개방형이어도 되는 것은, 단위 구조체(1)가 외력을 받지 않은 상태에서 일측이 개방된 고리형상을 이루고 있으며, 이를 커버하고 있는 커버수단(3)에 의하여 각 단위 구조체(1)가 소정의 간격으로 떨어져 있어 스텐트가 전체적으로 원통형상을 형성하게 되기 때문이다.As described above, the zigzag unit structure 1 may be an open type in which an open portion 5 is formed at one side, and the unit structure 1 is formed in an annular shape in which one side is opened without being subjected to an external force. This is because each unit structure 1 is separated by the cover means 3 at a predetermined interval so that the stent forms a cylindrical shape as a whole.

상기 지그재그 단위 구조체(1)는 외력을 가하지 않은 상태에서 일측이 개방된 고리형을 이루고 있는 것은, 내강에 삽입된 후에도 내강을 지나치게 압박되지 않도록 하기 위함이다.The zigzag unit structure 1 has an annular shape in which one side is opened in the state of not applying external force, so as not to overpress the lumen even after being inserted into the lumen.

그리고, 상기 커버수단(3)은 상기 지그재그 단위 구조체(1)을 스텐트가 전체적으로 원통형상을 가지도록 연결하기 위하여 상기 각각의 단위 구조체(1)를 동시에 일체로 피복함으로써 전체적으로 원통형상을 이루도록 한다.The cover means 3 covers the zigzag unit structure 1 so as to form an overall cylindrical shape by simultaneously covering the unit structures 1 integrally so as to connect the stents to have a generally cylindrical shape.

또한, 커버수단(3)은 유연성에 있어 탁월하며, 상기 각각의 단위 구조체(1)는 원통형상인 상기 커버수단(3)내에 포함되어 소정의 간격으로 떨어져 있어, 굽어져 있는 내강에 삽입시 커버수단(3)이 굽어져 있는 내강에 따라 쉽게 굽혀지게 되고 상기 단위 단위 구조체(1)도 이에 호응하게 된다.In addition, the cover means (3) is excellent in flexibility, each unit structure (1) is contained in the cover means (3) of a cylindrical shape and separated at predetermined intervals, the cover means when inserted into the bent lumen (3) is easily bent in accordance with the bent lumen, and the unit unit structure 1 is also compatible with this.

이와 같은 결과를 가져오기 위하여, 상기 커버수단(3)은 고무탄성을 지닌 물질인 것이 바람직하다.In order to bring about such a result, the cover means 3 is preferably a material having rubber elasticity.

다음 표에 나타난 바와 같은 재질상의 특징은 상기 커버수단(3)으로 사용되는 고무탄성을 지닌 물질의 특징을 일례로서 나타낸 것이다.Material characteristics as shown in the following table are shown as an example the characteristics of the rubber-elastic material used as the cover means (3).

상기와 같은 재질상의 특징을 만족시키는 것으로는 폴리우레탄이 있다.Polyurethane is a thing which satisfy | fills the characteristics of the above materials.

제3도에는 본 발명의 또다른 실시예에 따른 개방형 스텐트가 도시되어 있는데, 이도 마찬 가지로 지그재그 단위 구조체(11)와 커버수단(13)을 포함하고 있으며, 그 구조도 같다. 다만, 제1실시예의 개방형 스텐트와는 달리, 상기 단위 구조체(11)의 양단부가 서로 겹쳐져 겹침부(15)를 형성하고 있다.3 shows an open stent according to another embodiment of the present invention, which also includes a zigzag unit structure 11 and a cover means 13, and the structure thereof is also the same. However, unlike the open stent of the first embodiment, both ends of the unit structure 11 overlap each other to form the overlapping portion 15.

본 발명은, 유연성에 있어 불리한 지그재그 타입 스텐트의 전체적인 유연성을 향상시켜, 제2도에 도시된 바와 같이, 스텐트가 굽어져 있는 내강에 삽입될 때에도 내강 내벽을 지나치게 압박하거나 꺾여져 통로를 막지 않고, 좁아져 있는 내강을 효과적으로 확장할 수 있다. 뿐만 아니라, 지그재그 단위 구조체가 개방형으로 납땜과 같은 방법을 사용하지 않고 피복부가 이를 대신하도록 함으로써 인체 내에서 발생할 수 있는 2중금속 산화를 방지하여 인체가 중금속에 노출되는 것을 방지할 수 있으며, 폐쇄형일 때보다 제조하기가 쉬우므로 생산성을 향상시킬 수 있다.The present invention improves the overall flexibility of the zigzag-type stent, which is disadvantageous in terms of flexibility, and does not excessively press or bend the inner wall of the lumen even when the stent is inserted into the bent lumen, as shown in FIG. Narrow lumen can be effectively extended. In addition, the zigzag unit structure is open to prevent the metal from being exposed to heavy metals by preventing the oxidation of double metals that may occur in the human body by using a coating instead of using a method such as soldering. Since it is easy to manufacture, it can improve productivity.

Claims (4)

적어도 2개 이상의 지그재그 단위 구조체와, 상기 단위 구조체를 커버하기 위한 커버수단을 포함하는 스텐트에 있어서, 상기 각각의 단위 구조체가 개방부를 가지는 개방형이며, 이들을 서로 연결하는 별도의 수단 없이도 상기 커버수단 자체가 동시에 연결수단으로서의 역할을 하게 함으로써 원통형 스텐트를 형성할 수 있는 개방형 스텐트.A stent comprising at least two or more zig-zag unit structures and cover means for covering the unit structures, wherein each unit structure is an open type having an open portion, and the cover means itself may be provided without any additional means for connecting them. At the same time, an open stent that can form a cylindrical stent by acting as a connecting means. 제1항에 있어서, 개방부는 상기 단위 구조체의 양단부가 서로 겹쳐져 겹침부를 형성하고 있는 스텐트.The stent of claim 1, wherein both ends of the unit structure overlap each other to form an overlap. 제1항에 있어서, 커버수단은 고무탄성을 지닌 물질인 스텐트.The stent of claim 1, wherein the cover means is a material having rubber elasticity. 제3항에 있어서, 커버수단은 폴리우레탄 재질로 되어 있는 스텐트.4. The stent of claim 3, wherein the cover means is made of polyurethane.
KR1019960039092A 1996-05-23 1996-09-10 Opening stent KR0170219B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019960039092A KR0170219B1 (en) 1996-09-10 1996-09-10 Opening stent
EP97303517A EP0808614B1 (en) 1996-05-23 1997-05-22 Flexible self-expandable stent and method for making the same
DE69719237T DE69719237T2 (en) 1996-05-23 1997-05-22 Flexible, self-expandable stent and method for its manufacture
CNB971137749A CN1148232C (en) 1996-05-23 1997-05-23 Flexible self-expandable stent and method for making the same
JP13406097A JP3798507B2 (en) 1996-05-23 1997-05-23 Stent having flexibility and self-expandability and method for producing the same
US08/861,818 US6027525A (en) 1996-05-23 1997-05-23 Flexible self-expandable stent and method for making the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960039092A KR0170219B1 (en) 1996-09-10 1996-09-10 Opening stent

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KR19980020582A KR19980020582A (en) 1998-06-25
KR0170219B1 true KR0170219B1 (en) 1999-03-20

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