KR20050083458A - A stent - Google Patents

A stent Download PDF

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Publication number
KR20050083458A
KR20050083458A KR1020040011977A KR20040011977A KR20050083458A KR 20050083458 A KR20050083458 A KR 20050083458A KR 1020040011977 A KR1020040011977 A KR 1020040011977A KR 20040011977 A KR20040011977 A KR 20040011977A KR 20050083458 A KR20050083458 A KR 20050083458A
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South Korea
Prior art keywords
stent
circumferential
connecting member
present
elastic force
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KR1020040011977A
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Korean (ko)
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안재모
류용선
김동익
장양수
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장양수
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Priority to KR1020040011977A priority Critical patent/KR20050083458A/en
Publication of KR20050083458A publication Critical patent/KR20050083458A/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
    • A61F2/02—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
    • 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 sheet material 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 sheet material 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
    • 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
    • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0057—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof stretchable

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

Abstract

본 발명은 신체내에 삽입되어 충분한 지지력과 플렉시블한 연결부재의 유연성을 만족시킬 수 있도록 그 구조가 개량된 의료용 스텐트에 관한 것인 바, 그 구성은 자체 탄성력을 가지며 복수회 밴딩되어 파형(波形)의 형태를 갖도록 산과 골로 이루어진 각각의 단들이 배열되는 다수개의 원주부재와, 그 원주부재들의 산과 골 부위를 연결하도록 양단부가 상호 근접된 원주부재의 산 또는 골 부위에 각각 일체로 결합되며 라운드지게 형성된 만곡부가 적어도 하나이상 마련되는 연결부재로 구성된다.The present invention relates to a medical stent whose structure is improved to be inserted into the body to satisfy the sufficient support force and the flexibility of the flexible connecting member, the configuration has a self-elastic force and bends a plurality of times to form a wave A plurality of circumferential members, each end of which is composed of a hill and a valley arranged to have a shape, and a curved portion roundly formed integrally coupled to the hills or valleys of the circumferential member, which both ends are adjacent to each other to connect the peaks and valleys of the circumferential members. Consists of at least one connection member is provided.

이에 따르면 본 발명의 스텐트가 혈관의 내부에 삽입되어 탄성력으로 협착된 통로 내부를 탄성 바이어스시켜 팽창시키는 기능을 가질 뿐만 아니라, 연결부재의 밴딩 부위에 만곡부가 형성되어 협소한 공간내에서도 플렉시블한 구조를 가지게 되어 신축동작시 유연하게 반응할 수 있는 효과를 갖는다.According to this, the stent of the present invention has a function of elastically biasing and expanding the inside of the passage narrowed by elastic force by being inserted into the blood vessel, and a curved portion is formed at the bending portion of the connection member to have a flexible structure even in a narrow space. It has the effect of being able to react flexibly during stretching operation.

Description

개량된 연결부재로 구성된 스텐트{a stent}Stent consisting of an improved connection member {a stent}

본 발명은 의료용 기구에 관한 것으로, 보다 상세하게는 혈관이나 간의 트랙이 협착된 경우 이들 내강이나 혈관을 확장시킴과 아울러, 콤팩트한 구조로 연결부재의 신축성을 향상시키도록 그 구조가 개량된 연결부재로 구성된 스텐트에 관한 것이다. The present invention relates to a medical device, and more particularly, in the case where the blood vessels or the tracks of the liver are constricted, the connection member is improved in its structure to expand the lumen or blood vessels and improve the elasticity of the connection member in a compact structure. It relates to a stent consisting of.

일반적으로, 스텐트는 인체내에서 발생하는 각종 질병에 의해 인체내에 있는 내강이 좁아져서 그 고유의 기능을 저하시키거나, 혈관이 좁아져서 혈액의 순환이 불량한 경우등의 질환이 발생한 경우에 그 내강 또는 혈관의 내부에 시술하여 내강을 확장시키거나 혈관을 확장하기 위해 사용하는 의료용 기구이다.In general, the stent has a narrowing of the lumen in the human body due to various diseases occurring in the human body to decrease its intrinsic function, or when the disease occurs such as a poor circulation of blood due to the narrowing of blood vessels, It is a medical device used to expand the lumen or to expand blood vessels by performing treatment inside the blood vessels.

그 스텐트는 금속 탄성체로서, 식도암으로 식도가 협착현상을 일으키거나, 동맥경화증에 의해 혈관내에 원활한 혈액순환이 이루어지지 않을 때, 또는 간으로부터 나오는 담즙이 흐를 수 있는 트랙이 협착된 경우에 탄성체를 압축하여 협착된 통로내로 밀어 넣은 후, 이 탄성체의 확장에 따라 혈관이나 내강의 통로를 확장시켜 흐름상태를 원활하게 해주는 방안이 통상적이다.The stent is a metal elastic body that compresses the elastic body when esophageal cancer causes narrowing of the esophagus, when arterial sclerosis prevents blood circulation in the blood vessels, or when a track through which the bile from the liver flows is constricted. After pushing into the constricted passage, it is common to expand the passage of blood vessels or lumens according to the expansion of the elastic body to smooth the flow state.

기존의 스텐트는 그 시술방식에 따라 심장 혈관이나, 대동맥, 뇌혈관등의 혈관 및 식도, 위장, 대장등의 내강기관내에 풍선카테터(balloon catheter)와 함께 삽입되어 풍선이 팽창됨에 따라 관상형 통로를 확장시키는 풍선확장술과, 그 관상형 조직내에 내시경등에 의해 삽입되어 자체 복원 탄성력에 의해 팽창되는 자가팽창방식에 사용되는 것이 서로 구분된다.Existing stent is inserted along with balloon catheter in the lumen of cardiovascular, aortic, cerebrovascular, and lumen of esophagus, gastrointestinal, colon, etc. It is distinguished from the balloon dilation technique to be expanded and the self-expansion method that is inserted by the endoscope and the like into the tubular tissue and is expanded by self-resilient elastic force.

이는, 전자의 것이 풍선의 팽창에 따라 같이 외측으로 팽창되어 원래의 관상형 조직의 통로 크기대로 확장시키기 위해 탄성과 연성이 요구되는 방식이며, 후자는 관상형 조직의 협착부위에 삽입된 후에 자체 복원력에 의해 외측으로 팽창되어 협착된 부위를 확장시키기 위한 복원 탄성이 강조되는 것이다. This is the way in which the former is elastic and ductile in order to expand outward as the balloon expands and expand to the size of the passage of the original tubular tissue, while the latter is self-resilient after being inserted into the constriction of the tubular tissue It is emphasized that the restoring elasticity for expanding the constricted portion by expanding outward.

그중 상대적으로 내경이 좁은 인체내 혈관내 협착이 발생될 경우에는 풍선확장술을 주로 사용하고 있으며, 그 풍선확장술의 경우 풍선카테터가 스텐트에 삽입된 상태로 혈관내에 삽입되어 카테터의 풍선이 팽창하면서 스텐트가 외측으로 팽창되어 혈관내 통로를 확장시키도록 되어 있다.In the case of intravascular narrowing of the body with a relatively small internal diameter, balloon dilatation is mainly used.In the case of balloon dilation, a balloon catheter is inserted into a stent, and the balloon of the catheter expands as the stent expands. It expands outward to expand the intravascular passageway.

즉, 기존의 스텐트는 상기한 바와 같이, 풍선카테터를 삽입하여 목적으로 하는 부위에 고정시킨 후에 풍선을 확장하여 협착된 부위를 확장시키는 시술시 복잡하고 굴곡진 통로내의 삽입을 위해 연성이 요구되며, 그 시술이 끝난 후에 혈관(심장혈관, 대동맥, 뇌동맥등) 또는 관상형 조직의 수축되는 힘에 의해 스텐트의 구조가 변형되는 것을 방지하기 위한 탄성이 요구되었다.That is, the existing stent, as described above, after inserting the balloon catheter is fixed to the target site and expand the balloon to the procedure to expand the narrowed area is required for the insertion in the complex and curved passages, After the procedure, elasticity was required to prevent the stent from being deformed by the contracting force of blood vessels (cardiovascular vessels, aorta, cerebral arteries) or coronary tissue.

이를 위한 선행 기술로는 동출원인이 선출원한 대한민국 특허 제 338213호 "개량된 고유연성 스텐트"에 개시된 바와 같이, 상반된 방향의 상이한 곡률을 가지는 2개의 곡선이 연속적으로 반복되어 이루어진 물결모양의 돌기를 포함하는 다수의 가로분지와 상반된 방향의 동일한 곡률을 가지는 2개의 곡선이 연속적으로 반복되어 이루어진 다수의 세로분지가 30 내지 90°의 각도로 교차된 망이 말려 형성된 망형 원통형상의 몸통부와, 그 몸통부와 원통길이방향으로 인접하고 세로분지간의 폭이 몸통부의 세로분지간의 폭의 50 내지 85%이며 세로분지를 이루는 2개의 곡선의 길이가 몸통부의 세로분지를 이루는 2개의 곡선의 길이의 50 내지 85%인 구성을 포함하는 선단부와, 그 선단부 반대방향에서 몸통부와 인접하고 가로분지의 너비가 세로분지의 너비와 동일한 근위부가 일체화되어 구성된 것이다.Prior art for this includes a wave-like protrusion formed by successive repetition of two curves having different curvatures in opposite directions, as disclosed in Korean Patent No. 338213, "Improved Highly Flexible Stent", filed by the same applicant. A mesh-shaped cylindrical body portion formed by winding a cross-section of a plurality of longitudinal branches which are formed by successively repeating two curves having the same curvature in the opposite direction to a plurality of transverse branches and having an angle of 30 to 90 °, and the trunk portion thereof Adjacent to the length of the cylinder and the width between the longitudinal branches is 50 to 85% of the width between the longitudinal branches of the trunk, and the length of the two curves forming the longitudinal branches is 50 to 85% of the length of the two curves forming the longitudinal branches of the trunk. A tip including a phosphorus configuration, adjacent the trunk in the opposite direction of the tip, the width of the transverse basin equal to the width of the longitudinal basin One is composed of a proximal are integrated.

이러한 구조의 스텐트는 가로방향의 가로분지와 그 가로분지를 연결하도록 세로방향의 세로분지가 일체로 결합된 구조로서, 유연성이 우수한 구조를 갖게 된다.The stent of this structure is a structure in which the longitudinal branches in the longitudinal direction are integrally coupled to connect the horizontal branches in the horizontal direction and the horizontal branches, and have a structure having excellent flexibility.

따라서, 스텐트가 심한 굴곡부위 또는 수축이 심한 부위에 위치하는 혈관 및 관상형 조직에 시술하는 과정에서, 연결부재가 원주부재의 굽힘동작 및 팽창/수축 동작시 충분한 유연성 및 탄력성을 갖지 못할 경우, 연결부위에 크랙이 발생되거나, 심하게는 끊어지게 되어 제 기능을 수행하지 못할 우려가 있었다.Therefore, if the connecting member does not have sufficient flexibility and elasticity during bending and expansion / contraction of the circumferential member in the process of treating the vessel and the coronary tissue located in the severely curved or severely contracted site, the connection is performed. There was a risk of cracking in the site, or severely breaking and not functioning properly.

본 발명은 상기한 바와 같은 종래 기술의 문제점을 해소하기 위하여 발명된 것으로서, 그 목적은 탄성과 연성을 만족하면서 단순구조로 이루어지며 좁은 공간내에서도 스텐트의 팽창과 수축시 충분한 신축성 및 탄력성을 갖도록 그 구조가 개량된 연결부재로 구성된 스텐트를 제공하는데 있다.The present invention has been invented to solve the problems of the prior art as described above, the object is made of a simple structure while satisfying the elasticity and ductility and its structure to have sufficient elasticity and elasticity during expansion and contraction of the stent even in a narrow space To provide a stent consisting of an improved connection member.

상기한 목적을 달성하기 위한 본 발명은 자체 탄성력을 갖도록 밴딩되어 각각의 골과 산을 가지며 다수개의 단으로 배열되는 원주부재와, 양단부가 상기 각기 다른 원주부재들에 일체로 결합되는 연결부재를 구비하되,The present invention for achieving the above object is provided with a circumferential member which is bent to have its own elastic force and has a bone and an acid and is arranged in a plurality of stages, and both ends are integrally coupled to the different circumferential members. But

상기 연결부재는 복수회 밴딩되고, 그 밴딩되는 부위에 라운드지게 형성되는 만곡부가 적어도 한 개소이상 형성된 것을 특징으로 한다.The connecting member is bent a plurality of times, characterized in that formed at least one or more curved portions rounded to the bending portion.

본 발명의 다른 특징으로, 상기 원주부재의 단면 두께가 0.05~0.12㎜이고, 상기 원주부재의 너비가 0.08~0.14㎜이며, 상기 연결부재의 너비가 0.03~0.09㎜인 것이다.In another aspect of the present invention, the thickness of the circumferential member is 0.05 to 0.12 mm, the width of the circumferential member is 0.08 to 0.14 mm, and the width of the connecting member is 0.03 to 0.09 mm.

아래에서 언급하는 본 발명의 스텐트는 풍선카테터와 병행하여 스텐트가 삽입되는 풍선확장술에 대해 언급하기로 하되, 굳이 풍선확장술에만 한정되지는 아니할 것이다.The stent of the present invention mentioned below will be referred to the balloon dilatation in which the stent is inserted in parallel with the balloon catheter, but will not necessarily be limited to balloon dilation.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 개량된 연결부재로 구성된 스텐트는, 도 1 내지 도 4를 참조하여 설명하면, 그 구성은 자체 탄성력을 가지며 복수회 밴딩되어 파형(波形)의 형태를 갖도록 산(112)과 골(114)로 이루어진 각각의 단들이 배열되는 다수개의 원주부재(110)와, 그 원주부재(110)들의 산과 골 부위를 연결하도록 양단부가 상호 근접된 원주부재(110)의 산(112) 또는 골(114) 부위에 각각 일체로 결합되는 연결부재(120)로 구성된다.The stent composed of the improved connecting member according to the present invention will be described with reference to FIGS. 1 to 4, the configuration of which has its own elastic force and is bent a plurality of times so that the peak 112 and the bone ( 114, a plurality of circumferential members 110, each end of which is arranged, and a peak 112 or a valley of the circumferential member 110 having both ends proximal to each other to connect the peaks and valleys of the circumferential members 110. 114) is composed of a connecting member 120 which is integrally coupled to each part.

더 상세히 설명하면, 그 연결부재(120)가 산(122)과 골(124)을 갖도록 복수회 밴딩되는 구조를 가지되, 그 산(122)과 골(124)부위에 라운드지게 형성된 만곡부(125)가 마련된 것이다.In more detail, the connecting member 120 has a structure that is bent a plurality of times to have a peak 122 and a valley 124, but the curved portion 125 formed rounded around the peak 122 and the valley 124 ) Is prepared.

그 연결부재(120)는 복수회 밴딩되어 유연성과 탄성력을 부여하도록 플렉시블한 기능을 갖는다.The connecting member 120 has a flexible function to be bent a plurality of times to give flexibility and elasticity.

그리고, 원주부재(110)는 원통형으로 감겨짐이 가능한 구조를 가지며, 동일 길이를 갖는 다수개의 산(112)과 골(114)부위로 이루어진 다수개의 주름이 형성되고, 그 산(112)과 골(114)부위가 완만한 굴곡을 이루도록 형성된 구조를 갖는다.In addition, the circumferential member 110 has a structure capable of being wound in a cylindrical shape, and a plurality of wrinkles formed of a plurality of peaks 112 and valleys 114 having the same length are formed, and the peaks 112 and valleys are formed. (114) It has a structure formed to form a gentle bend.

또 바람직하게는, 그 원주부재(110)의 단면 두께가 0.05~0.12㎜이고, 원주부재(110)의 너비가 0.08~0.14㎜이며, 그 연결부재(120)의 너비가 0.03~0.09㎜인 것이 바람직하다. 이는 그 수치보다 작을 경우 강성과 지지력에 취약할 수 있으며, 그 수치보다 더 클 경우에는 탄성 및 혈관내 삽입이 용이하지 못하기 때문이다.Further preferably, the cross-sectional thickness of the cylindrical member 110 is 0.05 to 0.12 mm, the width of the peripheral member 110 is 0.08 to 0.14 mm, and the width of the connecting member 120 is 0.03 to 0.09 mm. desirable. This is because if it is smaller than that value, it may be vulnerable to rigidity and support, and if it is larger than that value, elasticity and endothelial insertion are not easy.

그 만곡부(125)는 원주부재(110)의 각 단들 사이의 공간을 최소로 사용하면서도 길이를 연장시킬 수 있으므로, 플렉시블한 연결부재(120)의 신축시 충분한 신축력을 부여하도록 하기 위함이다.Since the curved portion 125 can extend the length while using the space between the ends of the circumferential member 110 to a minimum, it is to give a sufficient elastic force during the expansion and contraction of the flexible connection member 120.

또한, 그 원주부재(110)는 다수의 밴딩 포인트를 갖는 지그재그형상을 갖추게 되며, 이는 실제로 혈관(300)내 협착된 부위를 외측으로 팽창시키는 힘을 지지하는 기능을 갖게 된다.In addition, the circumferential member 110 has a zigzag shape having a plurality of bending points, which has a function of supporting a force for actually expanding the constricted portion in the blood vessel 300 to the outside.

여기서 연결부재(120)는 일단부가 원주부재(110)의 산(112)에 연결되고, 타단부는 다른 근접된 원주부재(110)의 골(114) 부위에 연결되는 구조를 갖는다.Here, the connecting member 120 has a structure in which one end is connected to the mountain 112 of the circumferential member 110 and the other end is connected to the valley 114 portion of the other adjacent circumferential member 110.

또, 그 연결부재(120)는 각 단들이 원주부재(110)의 복수단들 사이에 개재되도록 일체로 연결되고, 복수회 굴곡되는 형상이 지그재그 형태의 "S"자가 수평으로 배열된 형상을 가지며, 원주부재(110)의 형상과 대응되는 형상을 갖도록 함이 바람직하다.In addition, the connection member 120 is integrally connected so that each end is interposed between a plurality of ends of the circumferential member 110, the shape bent a plurality of times has a shape in which the "S" in the zigzag form arranged horizontally , It is preferable to have a shape corresponding to the shape of the circumferential member (110).

그 원주부재(110)와 연결부재(120)는 금속재이나, 그 재질에 관계없이 팽창 복원력을 갖는 탄력적 성질을 갖는 것을 채용할 수 있다.The circumferential member 110 and the connecting member 120 may be made of a metal material or an elastic material having expansion restoring force regardless of the material.

이하, 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention will be described.

본 발명의 스텐트(100)는, 다수회 밴딩되어 산과 골 부위를 갖도록 굴곡지게 형성된 원주부재(110)와 연결부재(120)를 원통형으로 감아서 양단부를 결합시켜 일체화시킨 다음에, 도 3에서와 같이 혈관(300)내에 삽입가능하도록 부피가 압축된 후에 도 4에서와 같이 혈관(300)내의 협착된 부위에 스텐트(100)와 풍선카테터(200)를 삽입시킨 후에 풍선을 팽창시켜 협착된 부위를 강제로 넓히게 되는 기능을 수행하게 된다.In the stent 100 of the present invention, the circumferential member 110 and the connecting member 120, which are bent to be bent to have a hill and a valley part, are wound in a cylindrical shape to combine both ends thereof, and then, as shown in FIG. As shown in FIG. 4, after the volume is compressed to be inserted into the blood vessel 300, the stent 100 and the balloon catheter 200 are inserted into the narrowed portion of the blood vessel 300, and then the balloon is inflated to narrow the portion. It will be forced to widen.

이때, 스텐트(100)의 내부에 수용된 풍선카테터(200)가 협착된 부위에 도달하게 되면, 풍선을 팽창시켜 스텐트(100)를 외측으로 팽창시키고, 이에 따라 스텐트(100)의 중앙측 원주부재(110)가 협착부위와 직접 접촉되면서 혈관(200)내의 협착된 통로를 넓혀 원래의 내경을 갖도록 한다.At this time, when the balloon catheter 200 accommodated in the stent 100 reaches the constricted portion, the balloon is inflated to expand the stent 100 to the outside, and accordingly the center circumferential member of the stent 100 ( While 110 is in direct contact with the stenosis, the constricted passage in the blood vessel 200 is widened to have the original inner diameter.

이후에 풍선카테터(200)를 외부로 인출시켜 스텐트(100)로부터 분리시킴에 따라, 팽창된 스텐트(100)의 원주부재(110)가 혈관(300)내의 협착부위와 직접 접촉되면서 탄성력으로 그 협착된 통로 부위를 강제로 넓히면서 팽창된 상태를 유지하도록 지지하는 기능을 가지며, 그 연결부재(120)는 이러한 원주부재(110)의 움직임을 플렉시블하게 지지하는 기능을 갖는다.After the balloon catheter 200 is drawn out to separate from the stent 100, the circumferential member 110 of the inflated stent 100 is in direct contact with the stenosis in the blood vessel 300, the stenosis with elastic force It has a function of supporting to maintain the expanded state while forcibly widening the passage portion, the connecting member 120 has a function of supporting the movement of the circumferential member 110 flexibly.

또, 연결부재(120)는 각 산(122)과 골(124)부위에 만곡부(125)가 형성되어 있으므로, 신축되는 과정에서 만곡부(125)에 의해 길이가 보장되어 충분한 신축력을 얻을 수 있게 된다.In addition, since the curved member 125 is formed at each of the hills 122 and the valleys 124, the connecting member 120 is secured by the curved portion 125 in the stretching process, thereby obtaining sufficient elastic force. .

이에 따라, 본 발명의 스텐트(100)는 식도, 요도등의 내강과 혈관등의 내부에 혈류등의 흐름이 원활하게 이루어지도록 한 것이다.Accordingly, the stent 100 of the present invention is to facilitate the flow of blood flow, such as the lumen of the esophagus, urethra, and blood vessels.

이상과 같이 설명한 본 발명은 원주부재를 연결하는 연결부재의 구조를 플렉시블하게 복수회 밴딩되는 구조를 갖도록 된 것인 바, 이에 따르면 본 발명은 원주부재와 연결부재가 내강이나 혈관의 내부에 삽입되어 탄성력으로 협착된 통로 내부를 탄성 바이어스시켜 팽창시키는 기능을 가질 뿐만 아니라, 연결부재의 밴딩 부위에 만곡부가 형성되어 협소한 공간내에서도 플렉시블한 구조를 가지게 되어 신축동작시 유연하게 반응할 수 있는 효과를 갖는다.As described above, the present invention is intended to have a structure in which the structure of the connecting member connecting the circumferential member is flexibly bent a plurality of times. According to the present invention, the circumferential member and the connecting member are inserted into the lumen or the blood vessel. It has the function of elastically biasing and expanding the inside of the passage constricted by the elastic force, and has a curved portion formed at the bending portion of the connection member to have a flexible structure even in a narrow space, thereby having a flexible reaction in the stretching operation. .

도 1은 본 발명에 따른 스텐트의 펼친 상태를 나타낸 전개도.1 is an exploded view showing an unfolded state of the stent according to the present invention.

도 2는 본 발명의 스텐트가 원통형으로 감겨진 상태를 나타낸 정면도.Figure 2 is a front view showing a state in which the stent of the present invention is wound in a cylindrical shape.

도 3은 본 발명의 스텐트가 혈관내에 삽입되기 전에 축소된 상태를 나타낸 정면도.Figure 3 is a front view showing a reduced state before the stent of the present invention is inserted into the blood vessel.

도 4는 본 발명의 사용상태를 나타낸 예시도.4 is an exemplary view showing a use state of the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on main parts of drawing

100 : 스텐트 110 : 원주부재100: stent 110: circumferential member

112 : (원주부재의)산 114 : (원주부재의)골112: mountain (of the column member) 114: goal (of the column member)

120 : 연결부재 122 : (연결부재의)산120 connection member 122 acid (of connection member)

124 : (연결부재의)골 125 : 만곡부124: bone (of the connecting member) 125: curved portion

200 : 풍선카테터 300 : 혈관200: balloon catheter 300: blood vessel

Claims (2)

자체 탄성력을 갖도록 밴딩되어 각각의 골(112)과 산(114)으로 이루어진 복수개의 주름을 가지며 다수개의 단으로 배열되는 원주부재(110)와, A circumferential member 110 that is bent to have its own elastic force and has a plurality of corrugations formed of each of the valleys 112 and the peaks 114 and is arranged in a plurality of stages, 양단부가 상기 각기 다른 원주부재(110)들에 일체로 결합되는 연결부재(120)를 구비하되,Both ends are provided with a connecting member 120 which is integrally coupled to the different circumferential member 110, 상기 연결부재(120)는 밴딩되고, 그 밴딩되는 부위에 라운드지게 형성된 만곡부(125)가 적어도 한 개소이상 형성된 것을 특징으로 하는 개량된 연결부재로 구성된 스텐트.The connecting member 120 is bent, the stent consisting of an improved connecting member, characterized in that formed at least one or more curved portions 125 formed round to the bending portion. 제 1항에 있어서, 상기 원주부재의 단면 두께가 0.05~0.12㎜이고,The cross-sectional thickness of the circumferential member is 0.05 to 0.12 mm, 상기 원주부재의 너비가 0.08~0.14㎜이며,The width of the circumferential member is 0.08 ~ 0.14 mm, 상기 연결부재의 너비가 0.03~0.09㎜인 것을 특징으로 하는 개량된 연결부재로 구성된 스텐트.Stent consisting of an improved connecting member, characterized in that the width of the connecting member is 0.03 ~ 0.09mm.
KR1020040011977A 2004-02-23 2004-02-23 A stent KR20050083458A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990013858A (en) * 1997-07-16 1999-02-25 장양수 Blood vessel stent
KR20010030765A (en) * 1997-09-29 2001-04-16 쿡 인코포레이티드 Radially expandable nickel-titanium surgical stent
KR20010084836A (en) * 2000-02-29 2001-09-06 강성권 Stent
KR100338213B1 (en) * 2000-01-19 2002-05-24 장양수 A Stent With Improved Flexibility
JP2002224224A (en) * 2001-02-01 2002-08-13 Kanegafuchi Chem Ind Co Ltd Stent
JP2003190294A (en) * 2001-10-16 2003-07-08 Kawasumi Lab Inc Stent
KR20040087492A (en) * 2003-04-08 2004-10-14 주식회사 에스앤지바이오텍 A cylindrical stent

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990013858A (en) * 1997-07-16 1999-02-25 장양수 Blood vessel stent
KR20010030765A (en) * 1997-09-29 2001-04-16 쿡 인코포레이티드 Radially expandable nickel-titanium surgical stent
KR100338213B1 (en) * 2000-01-19 2002-05-24 장양수 A Stent With Improved Flexibility
KR20010084836A (en) * 2000-02-29 2001-09-06 강성권 Stent
JP2002224224A (en) * 2001-02-01 2002-08-13 Kanegafuchi Chem Ind Co Ltd Stent
JP2003190294A (en) * 2001-10-16 2003-07-08 Kawasumi Lab Inc Stent
KR20040087492A (en) * 2003-04-08 2004-10-14 주식회사 에스앤지바이오텍 A cylindrical stent

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