WO2011132897A2 - Stent chirurgical - Google Patents

Stent chirurgical Download PDF

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Publication number
WO2011132897A2
WO2011132897A2 PCT/KR2011/002752 KR2011002752W WO2011132897A2 WO 2011132897 A2 WO2011132897 A2 WO 2011132897A2 KR 2011002752 W KR2011002752 W KR 2011002752W WO 2011132897 A2 WO2011132897 A2 WO 2011132897A2
Authority
WO
WIPO (PCT)
Prior art keywords
curved portion
stent
curved portions
links
cells
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.)
Ceased
Application number
PCT/KR2011/002752
Other languages
English (en)
Korean (ko)
Other versions
WO2011132897A3 (fr
Inventor
김헌영
현창백
유혁상
이승렬
최란
김혜성
노형진
김영완
이광호
박현식
윤수진
김영희
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Academic Cooperation Foundation of KNU
Original Assignee
Industry Academic Cooperation Foundation of KNU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Industry Academic Cooperation Foundation of KNU filed Critical Industry Academic Cooperation Foundation of KNU
Publication of WO2011132897A2 publication Critical patent/WO2011132897A2/fr
Publication of WO2011132897A3 publication Critical patent/WO2011132897A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • A61F2002/91583—Adjacent bands being connected to each other by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band

Definitions

  • the present invention relates to a surgical stent, and more particularly to a cylindrical surgical stent that does not contract in the axial direction even when inflated.
  • Abnormally narrowed passages of the lumen such as the esophagus, blood vessels, and bile tracks of the human body, are of course in a state of inability to function as well as to deterioration.
  • a luminal extension device called a stent into the stenosis of the human lumen, the passage of the lumen can be restored to normal.
  • the stent In cardiovascular surgery, a procedure is often performed to place the stent in a location where the artery is damaged. When the stent is placed in an artery, the stent dilates the artery and strengthens blood flow.
  • the preferred form of the stent for implantation in arteries and the like is a cylindrical stent that can expand radially from a small diameter to a large diameter.
  • This cylindrical stent can be inserted into the artery through a catheter and moves inwards through the arterial path of the patient until the unexpanded stent is positioned where desired. Once the stent is in the desired position, the balloon is inflated outwards using a balloon or other expansion mechanism to engage the artery. Cylindrical stents should exhibit sufficient rigidity even after they are expanded. In addition, the stiffness of the stent should be maintained even after the catheter is removed.
  • Cylindrical stents have a variety of shapes to provide adequate performance for a variety of environments.
  • Patent documents such as U.S. Patent Nos. 5,514,154, 5,421,955, 5,242,399, 5,531,741, 5,522,882, 5,507,771, 5,314,444, 5,496,277, 5,494,029, and 5,507,767.
  • Various forms of cylindrical stents are disclosed for implantation into the lumen.
  • expandable stents of U. S. Patent No. 5,514, 154 have a unique structure for limiting the contraction in the axial direction, but is accompanied by a slight contraction such as an axial contraction appearing at the end. Therefore, there is a problem that it is difficult to position the stent after the expansion.
  • the present invention has been made to solve the above problems, it is an object of the present invention, there is no contraction in the axial direction even when expanding in the radial direction, to provide a surgical stent having a strong supporting force after the procedure.
  • Surgical stent according to the present invention for achieving the above object, in the surgical stent forming a cylindrical shape before and after expansion, the first curved portion convex in the circumferential direction, the second curved portion concave in the circumferential direction And a third curved portion convex in the axial direction and a fourth curved portion concave in the axial direction, the first curved portion being connected to the third curved portion and the fourth curved portion, respectively, and the second curved portion being the third curved portion and A plurality of cells connected to the fourth curved portion and spaced apart in a line in the circumferential direction;
  • a ring-shaped stent ring comprising a plurality of first links having a first curved portion and a second curved portion of two adjacent ones of the plurality of cells, the fifth curved portion being axially convex;
  • the point where the first curved portion and the second curved portion meet the plurality of first links is characterized by consisting of a point away from the central axi
  • Using the surgical stent according to the present invention has the effect of minimizing the contraction in the axial direction when inflated to position the stent in the correct position. In addition, there is an effect that can hold a strong support force after the procedure to prevent restenosis of blood vessels and the like.
  • FIG. 1 is a perspective view showing the configuration of a surgical stent in accordance with the present invention.
  • FIG. 2 is an exploded view of the stent of FIG. 1.
  • FIG. 3 is a development view when the surgical stent in accordance with the present invention is contracted.
  • FIG. 4 is an exploded view when the surgical stent according to the present invention is inflated.
  • FIG. 5 is a view comparing before and after deformation when the force according to the expansion is applied to the vertices of the cell in the surgical stent according to the present invention.
  • FIG. 6 is a view comparing before and after deformation when the expanded force is applied to the eccentric point of the cell in the surgical stent according to the present invention.
  • Figure 7 is a perspective view showing the configuration of a surgical stent of another embodiment according to the present invention.
  • FIG. 8 is an exploded view of the stent of FIG. 7.
  • the 'axial direction' refers to the direction of the arrow i shown in the drawing
  • the 'radial direction' refers to the direction of the arrow j shown in the drawing
  • the 'circumferential direction' refers to the direction of the arrow k shown in the drawing.
  • Means. 'Concave' refers to a curved line that goes in the direction indicated by arrows i, j, and k.
  • 'Convex' means the shape of the curve protruding toward the direction indicated by the arrows i, j, k.
  • the surgical stent according to the present invention includes a plurality of stent rings 10 arranged in a row in the axial direction.
  • the stent rings 10 may include a plurality of cells 11 and a plurality of first links 20 that circumferentially connect two adjacent cells 11 of the plurality of cells 11. It consists of.
  • the cells 11 have a deformed truss shape.
  • the cells 11 have a first curved portion 12 convex in the circumferential direction, a second curved portion 13 concave in the circumferential direction, a third curved portion 14 convex in the axial direction, and a fourth concave in the axial direction. It consists of a curved portion 15.
  • the first curved portion 12 is connected to the third curved portion 14 and the fourth curved portion 15 to form an inflection point 16, respectively.
  • the second curved portion 13 is connected to the third curved portion 14 and the fourth curved portion 15 to form an inflection point 16, respectively. Accordingly, the cells 11 form a closed curved surface therein.
  • first curved portion 12 and the second curved portion 13 are symmetrical with each other, and the third curved portion 14 and the fourth curved portion 15 are also symmetrical with each other.
  • the larger shape of the first curved portion 12 and the second curved portion 13 than the third curved portion 14 and the fourth curved portion 15 is stable.
  • the cells 11 are arranged spaced apart in a line in the circumferential direction, and each cell 11 is connected to the first links 20.
  • the first links 20 have a fifth curved portion 21 that is axially convex and connects the first curved portion 12 and the second curved portion 13 of two adjacent cells 11.
  • the point 22 where the first curved portion 12 and the second curved portion 13 meet is preferably eccentrically positioned at a point beyond the vertices of the first curved portion 12 and the second curved portion 13. .
  • FIG. 5 compares before and after deformation when a force due to expansion is applied to the vertices of the first curved portion 12 and the second curved portion 13, and FIG. 6 shows the expanded force acting on the eccentric point. This is a comparison between before and after deformation.
  • the amount of movement of the fourth curved portion 15 is small and is shown in addition to the amount of movement of the third curved portion 14.
  • a space capable of increasing the length of the first links 20, that is, the first links 20 are formed in the cell ( 11)
  • the distance between the points and the connection is long, so that the expansion of the stent during the procedure can be expanded at a larger rate.
  • the force applied to the cells 11 having the eccentric coupling structure as shown in the present invention is smaller than that of the cell having the coupling structure as shown in FIG. 5. do.
  • a surgical stent in accordance with the present invention has a plurality of second links 30 that axially connect the stent rings 10.
  • the second links 30 have a curved shape having two vertices 31 and connect the third curved portion 14 and the fourth curved portion 15 of two adjacent cells 11.
  • the second link 30 should be able to accommodate the bending when the stent is mounted to the curved blood vessel, etc., and has a structure that can secure the supporting force when the stent is expanded and fixed.
  • This structure is embodied in a curved shape with two vertices 31, which accommodates the deformation of the cells 11 and also serves to support the vessel wall in a wide range to prevent the vessel wall from invading into the stent. do.
  • the second links 30 need not limit the number of vertices 31 to two. That is, when the vessel is bent in many sections, a stent having three or more vertices 31 may be used, and a stent having one vertex 31 may be used in a straight section. Normally, it is stable for the second links 30 having two vertices 31 to be used as in this embodiment.
  • FIG. 7 and 8 show another embodiment of a surgical stent in accordance with the present invention.
  • the surgical stent of another embodiment according to the present invention basically has the same configuration as the embodiment shown in Figures 1 and 2, the third curved portion 14 and the fourth curved portion
  • An additional strut 17 is provided. This strut 17 can prevent the axial contraction by minimizing the deformation of the cells 11 that occur during expansion. Since the configuration of the surgical stent according to another embodiment of the present invention is the same as the configuration of the surgical stent according to the present invention described above, a detailed description of the configuration and operation will be omitted.
  • the cells 11, the first links 20, and the second links 30 are all made of a flexible metal material. Such materials may be used as used for ordinary stents.
  • nano-processing is formed on the surfaces of the cells 11, the first links 20, and the second links 30 in order to additionally treat drugs such as thrombolytics, thereby forming a space for accommodating drugs. desirable.
  • the cells 11 formed at the end of the stent may be clearly visible through the medical imaging device during or after implantation of the stent in the body lumen of the patient. It is preferable to be formed of a radio-opaque material such as gold, silver, platinum, and the like. Using the stent as described above can minimize the contraction in the axial direction when inflated, there is an advantage that can be placed in the correct position.

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

Abstract

La présente invention a pour objet un stent chirurgical cylindrique qui n'est pas contracté dans une direction axiale même pendant une expansion. La présente invention comprend un anneau de stent annulaire ayant : une pluralité de cellules disposées en étant espacées dans une rangée dans une direction circonférentielle ; et une pluralité de premières liaisons. La pluralité de cellules comprennent des premières parties incurvées qui sont convexes dans une direction circonférentielle, des deuxièmes parties incurvées qui sont concaves dans une direction circonférentielle, des troisièmes parties incurvées qui sont convexes dans une direction axiale, et des quatrièmes parties incurvées qui sont concaves dans une direction axiale. Lesdites premières parties incurvées sont respectivement reliées aux troisièmes parties incurvées et aux quatrièmes parties incurvées, et lesdites deuxièmes parties incurvées sont respectivement reliées aux troisièmes parties incurvées et aux quatrièmes parties incurvées. Lesdites premières liaisons sont formées à partir d'une pluralité de liaisons, qui relient les premières parties incurvées et les deuxièmes parties incurvées de deux cellules adjacentes parmi la pluralité de cellules, et ont des cinquièmes parties incurvées qui sont convexes dans une direction axiale. Les points auxquels les premières parties incurvées et les deuxièmes parties incurvées rencontrent la pluralité de premières liaisons sont en dehors des axes centraux des premières parties incurvées et des deuxièmes parties incurvées.
PCT/KR2011/002752 2010-04-23 2011-04-18 Stent chirurgical Ceased WO2011132897A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100037839A KR101015329B1 (ko) 2010-04-23 2010-04-23 외과용 스텐트
KR10-2010-0037839 2010-04-23

Publications (2)

Publication Number Publication Date
WO2011132897A2 true WO2011132897A2 (fr) 2011-10-27
WO2011132897A3 WO2011132897A3 (fr) 2012-03-22

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PCT/KR2011/002752 Ceased WO2011132897A2 (fr) 2010-04-23 2011-04-18 Stent chirurgical

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KR (1) KR101015329B1 (fr)
WO (1) WO2011132897A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106580528A (zh) * 2017-02-04 2017-04-26 成都鼎信致远科技有限公司 防止冠脉术后再狭窄的冠脉支架

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101064215B1 (ko) * 2011-02-25 2011-09-14 강원대학교산학협력단 확장형 스텐트
KR101064214B1 (ko) * 2011-04-08 2011-09-14 강원대학교산학협력단 키토산 코팅층을 구비한 약물 용출형 스텐트 및 그 제조방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69528216T2 (de) * 1994-06-17 2003-04-17 Terumo K.K., Tokio/Tokyo Verfahren zur Herstellung eines Dauerstents
US5868782A (en) * 1996-12-24 1999-02-09 Global Therapeutics, Inc. Radially expandable axially non-contracting surgical stent
KR100360364B1 (ko) 2000-05-22 2002-11-13 주식회사 정성메디칼 관상동맥 설치용 금속 스텐트
US6699278B2 (en) * 2000-09-22 2004-03-02 Cordis Corporation Stent with optimal strength and radiopacity characteristics
US7029494B2 (en) * 2002-02-08 2006-04-18 Scimed Life Systems, Inc. Braided modular stent with hourglass-shaped interfaces
US7476245B2 (en) * 2005-08-16 2009-01-13 Advanced Cardiovascular Systems, Inc. Polymeric stent patterns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106580528A (zh) * 2017-02-04 2017-04-26 成都鼎信致远科技有限公司 防止冠脉术后再狭窄的冠脉支架

Also Published As

Publication number Publication date
KR101015329B1 (ko) 2011-02-16
WO2011132897A3 (fr) 2012-03-22

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