GB2512176A - Stents and apparatus and method for manufacturing the same - Google Patents

Stents and apparatus and method for manufacturing the same Download PDF

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Publication number
GB2512176A
GB2512176A GB1400089.7A GB201400089A GB2512176A GB 2512176 A GB2512176 A GB 2512176A GB 201400089 A GB201400089 A GB 201400089A GB 2512176 A GB2512176 A GB 2512176A
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United Kingdom
Prior art keywords
locking part
stent
locking
forming
outer peripheral
Prior art date
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Granted
Application number
GB1400089.7A
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GB201400089D0 (en
GB2512176B (en
Inventor
Do-Hyun Park
Jong-Chae Park
Byoyng-Yun Ki
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MI Tech Co Ltd
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MI Tech Co Ltd
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Publication of GB201400089D0 publication Critical patent/GB201400089D0/en
Publication of GB2512176A publication Critical patent/GB2512176A/en
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Publication of GB2512176B publication Critical patent/GB2512176B/en
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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
    • 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
    • A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
    • 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
    • A61F2/82—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
    • A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
    • A61F2002/8486—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs provided on at least one of the ends
    • 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
    • A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2240/001—Designing or manufacturing processes

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
  • Clamps And Clips (AREA)

Abstract

A stent (100) comprises a hollow metal wire cylindrical body (110) and first (120-123) and second (130-132) locking parts protruding outwardly from the body. Apparatus 200 for manufacturing a stent comprises a support part 210 having a cylindrical body adapted for forming the stent and has fastening openings 211 formed on the outer peripheral surface of the body, support pins 220 adapted to be inserted into the fastening openings 211 to support the metal wire forming the stent in use, so that the metal wire is bent in a zig-zag configuration on the surface of the support part, and locking part-forming pins 230, each locking part-forming pin having at least one fixing groove formed around the outer peripheral surface thereof. Alternatively, apparatus for manufacturing a stent comprises a support part 210 having a cylindrical body adapted for forming the stent and having fastening openings 211 formed on the outer peripheral surface of the body, and support pins 220 adapted to be inserted into the fastening openings in such a manner as to protrude from the outer peripheral surface of the support part, each support pin having at least one fixing groove formed around the outer peripheral surface thereof. Methods of manufacturing stents are also disclosed and claimed.

Description

TITLE
Stents arid apparatus and methods for manufacturing the same
DESCRIPTION
Technical Field
The present invention relates to a stent for the prevention of migration and an apparatus and method for manufacturing the same.
Background Art
Generally, if constricted portions are formed in a oavity like a throat, duodenum, and so on, of the human body due to cancer tissues, food does not flow gently thereinto.
Recently, it is known to insert a cavity expansion instrument like a stent into the oavity so as to expand the passages of the constricted portions of the cavity, which allows the food to flow gently through the cavity.
On the other hand, a stent inserted into a digestive organ is often migrated from its initial inserted position over time due to the peristaltic motion of the digestive organ, thereby making it hard to ensure the stability of the stent.
So as to solve the above-mentioned problems, accordingly, there have been proposed Korean Patent Nos.l0-l076716 and 10- 0961466 wherein the position of the stent inserted into a cavity is maintained stably.
According to the above-mentioned conventional practices, even if food enters the cavity, the position of the stent is fixedly maintained, thereby preventing the migration in the direction to which the food moves. However, the stent may be moved reversely through the means adapted to fix the stent to the cavity.
Summary of the Invention
Accordingly, the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a stent that is capable of preventing migration after it has been inserted into a cavity of the human body.
According to a first aspect of the present invention, there is provided a stent comprising: a hollow cylindrical body made of a metal wire; a first locking part protruding outwardly from the body; and a second locking part protruding outwardly from the body and spaced apart from the first locking part in the longitudinal direction of the body in a symmetrical relation with respect to the first locking part, e.g., around the vertical surface with respect to the longitudinal direction of the body.
The first and second locking parts can have substantially the same configuration (e.g., substantially the same number of locking members at substantially the same circumferential spacing) . The first and second locking parts can be offset in the circumferential direction, optionally such that locking members of the first locking part are aligned in the longitudinal direction with the spaces between locking members of the second locking part.
Preferably, at least one of the first locking part and the second locking part includes a plurality of locking members.
Preferably, the plurality of locking menbers are j substantially equally spaced apart frcm each other around the outer peripheral surface cf the bcdy to form a row of locking members. Two or more rows can be formed along the longitudinal direction of the body.
At least one of the first locking part and the second locking part can protrude outwardly from the body at an angle of from about o° to about 9Q0 with respect to the outer peripheral surface of the body. Typically, each locking member of the first locking part or second locking part will be at an acute angle with respect to the outer peripheral surface of the body. The distal end of each locking member typically points towards the opposite end of the body, i.e., such that the locking nembers of the first and second locking parts face generally towards each other.
Preferably, at least one of the first locking part and the second locking part is formed from a portion of the metal wire forming the body, or from a separate metal wire.
According to a second aspect of the present invention, there is provided an apparatus for manufacturing a stent, the apparatus including: a support part having a cylindrical body adapted for forming the stent and having fastening openings formed on the outer peripheral surface of the body; support pins adapted to be inserted into the fastening openings to support the metal wire forming the stent in use, so that the metal wire is bent in a zig-zag configuration on the surface of the support part; and locking part-forming pins, each locking part-forming pin having at least one fixing groove formed around the outer peripheral surface thereof.
Each locking part-forming pin can have an inner diameter larger than the outer diameter of the support pins, so that the locking part-forming pins are coupled to the support pins.
In particular, each locking part-forming pin can have an insertion hole sized and shaped to receive an end of a corresponding support pin.
The support pins and the looking part-forming pins can be integrally formed.
Preferably, a plurality of fixing grooves are formed along the outer peripheral surface of each locking part-forming pin in the longitudinal direction of each locking part-forming pin.
According to a third aspect of the present invention, there is provided an apparatus for manufacturing a stent, the apparatus including: a support part having a cylindrical body adapted for forming the stent and having fastening openings formed on the outer peripheral surface of the body; and support pins adapted to be inserted into the fastening openings in such a manner as to protrude from the outer peripheral surface of the support part, each support pin having at least one groove formed around the outer peripheral surface thereof.
Preferably, a plurality of fixing grooves are formed along the outer peripheral surface of each support pin in the longitudinal direction of each support pin.
According to a fourth aspect of the present invention, there is provided a method for manufacturing a stent, the method including the steps of: coupling the stent to a support part having a cylindrical body; Inserting support pins into fastening openings formed on the outer peripheral surface of the body; coupling locking part-forming pins to the support pins, each locking part-forming pin having at least one groove formed around the outer peripheral surface thereof; connecting a metal wire to a first end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a first locking part, and fixedly locking the first locking part into the fixing grooves of first locking part-forming pins; and connecting a metal wire to a second end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a second locking part, and fixedly locking the second locking part into the fixing grooves of second locking part-forming pins, the second locking part being in a symmetrical relation with respect to the first locking part.
According to a fifth aspect of the present invention, there is provided a method for manufacturing a stent, the method comprising the steps of: coupling the stent to a support part having a cylindrical body; Inserting support pins into fastening openings formed on the outer peripheral surface of the body, each support pin having at least one fixing grooves formed around the outer peripheral surface thereof; connecting a metal wire to a first end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a first locking part, and fixedly locking the first locking part into the fixing grooves of first support pins; and connecting a metal wire to a second end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a second locking part, and fixedly locking the second locking part into the fixing grooves of second support pins, the second locking part being in a symmetrical relation with respect to the first locking part.
Preferably, at least one of the first locking part and the second locking part is formed from a portion of the metal wire forming the body, or from a separate metal wire.
According to the present invention, the first locking part and the second locking part are formed symmetrically with respect to each other on the outer peripheral surface of the body of the stent, so that after the stent is inserted into the cavity, it can be stably positioned there, without any migration in one direction or the other side direction.
Drawings FIG. 1 is a perspective view showing an apparatus for manufacturing a stent according to the present invention; FIG. 2 is a perspective view showing a locking part-forming pin according to the present invention; FIG. 3 is a perspective view showing a procedure for manufacturing a stent according to the present invention; and FIGS. 4 to 6 are views showing the stent according to the present invention.
FIG. 7 is a flow chart showing a method for manufacturing the stent according to the present invention.
The following description relates to a stent for the prevention of migration according to the present invention (i.e., a stent that will not undergo migration and which is stably positioned within a body cavity) . For the brevity of the description, the technological features of the stent that are already well known in the art will be not explained in detail or will be explained only briefly.
with reference to FIGS. 4 to 6, a stent 100 according to the present invention includes a cylindrical body 110, a first locking part with four locking members 120, 121, 122 and 123 (referred to below as first locking parts) , and a second locking part with follr locking members 130, 131, and 132 (referred to below as second locking parts -only three of which are shown in FIGS 4 and 5) The cylindrical body 110 has a hollow cylindrical shape and is made of a metal wire. Tn this case, the metal wire is preferably made of a shape memory alloy having elasticity like nickel-titanium alloy.
The first locking parts 120, 121, 122 and 123 protrude outwardly from the body 110. The second locking parts 130, 131 and 132 also protrude outwardly from the body 110 and are formed spaced apart from the first locking parts 120, 121, 122 and 123 in the longitudinal direction of the body 110.
At this time, the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 are formed at an acute angle with respect to the outer peripheral surface of the body 110, and the second locking parts 130, 131 and 132 are formed symmetrically with respect to the first locking parts 120, 121, 122 and 123 around the vertical surface with respect to the longitudinal direction of the body 110.
The first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 are egually spaced apart from each other around the outer peripheral surface of the body (i.e., in the circumferential direction) to form a row.
The metal wire for constituting the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 is preferably made of a shape memory alloy having elasticity like nickel-titanium alloy.
The first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 are spaced apart from each other in the longitudinal direction of the body 110 (e.g., at opposite ends of the body) , so that when the stent 100 is inserted into a cavity, the interference between the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 caused by their elasticity can be minimized to allow the inserted position in the cavity of the stent 100 to be stably maintained.
The first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 extend in a direction where they overlap with the body 110 (i.e., the locking members extend towards each other as shown in FIGS. 4 and 5) in such a manner as to have a given angle with respect to the body 110, and according to the present invention, when the given angle of first locking ends or second locking ends with respect to the body 110 is between about 0° and about 90°, the inserted position of the stent can be fixedly maintained well.
The first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 can extend from a portion of the metal wire forming the body 110, or can protrude from the outer periphery of the body 110 with a separate metal wire.
Furthermore, the stent 100 according to the present invention includes cover parts 140 and 141. The cover part 140 is formed of a hollow cylindrical shape having a passage formed at the inside thereof and is located inside the body 110 in such a manner as to be brought into contact with the body 110.
In this case, the cover parts 140 and 141 are made of medical polyurethane, silicon-urethane copolymer, silicon, polyamide, polyester, fluorocarbon resin or the like.
The cover part 140 is coated in such a manner as to be brought into contact with the whole surface of the body 110 or with a portion of the body 110.
The cover part 141, which is made of the same material as the body 110, is formed on the surfaces of the first locking parts 120, 121, 122 and 123 or the second locking part 130, 131 and 132, and the formation of the cover part 141 protects the inner wall of the cavity from the damage caused by the first locking parts 120, 121, 122 and 123 or the second locking parts 130, 131 and 132.
An apparatus 200 for manufacturing the stent 100 according to the present invention is shown in FIGS 1-3 and includes a support part 210, support pins 220 and 221, and locking part-forming pins 230.
The support part 210 has a cylindrical body prepared for manufacturing the stent and has one or more fastening openings 211 and 212 formed on the outer peripheral surface thereof in such a manner as to allow the support pins 220 and 221 to be coupled to the support part 210.
The support pins 220 and 221 are inserted into the fastening openings 211 and 212 to support the metal wire forming the stent, so that the metal wire is bent in a zig-zag configuration on the surface of the zig part 210.
As shown in FIG. 2, each locking part-forming pin 230 has an insertion hole 233 formed at the interior thereof in such a manner as to allow one of the support pins 220 and 221 to be inserted into it. Each locking part-forming pin 230 also has fixing grooves 231 and 232 formed around the outer peripheral surface thereof.
In this case, the locking part-forming pins 230 have an inner diameter larger than the outer diameter of the support pins 220 and 221, so that the looking part-forming pins 230 oan be coupled to the support pins 220 and 221. That is, the support pins 220 and 221 are inserted into the locking part-forming pins 230, so that the coupling operation of the locking part-forming pins 230 to the support pins 220 and 221 fixed to the fastening openings 211 and 212 of the support part 210 can be conveniently performed. Further, the fixing grooves 231 and 232 are formed along the outer peripheral surface of the locking part-forming pin 230 so as to fix the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 thereto, so that the angles of the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132 can be easily adjusted.
According to another preferred embodiment of the present invention, the support pins and the locking part-forming pins may be integrally formed.
According to yet another preferred embodiment of the present invention, a support pin (not shown) , which is inserted into the fastening openings 211 and 212 in such a manner as to protrude from the outer peripheral surface of the support part 210, has a groove formed around the outer peripheral surface thereof, thereby making it possible to serve as the locking part-forming pin 230 for adjusting the angles of the first locking parts 120, 121, 122 and 123 and the second locking parts 130, 131 and 132.
A method for manufacturing the stent 100 will be explained with reference to FIG. 7, and for the convenience of the description, the manufacturing procedure will be described with the following steps.
1. Stent coupling step (5501) In this step, the stent is coupled to the support part 210 having the cylindrical body. Before this step, a stent manufacturing step is further provided wherein a metal wire is wound on the support pius 220 and 221 of the support part 210 and extended in the zig-zag configuration in the circumferential direction of the zig part 210 to form the body 110 of the stent 100.
2. Support pin insertion step (S502) Support pins are inserted into the fastening openings 211 and 212 formed on the outer peripheral surface of the support part 210 coupled to the stent at the step (3502) . At this time, the inserted position of the support pins can be changed in accordance with the position of the first locking parts 120, 121, 122 and 123 or the second locking parts 130, 131 and 132.
3. Locking part-forming pin coupling step (5503) The locking part-forming pins 230 each having grooves formed around the outer peripheral surface thereof are coupled to the support pins that were inserted into the fastening openings 211 and 212 at the step (3502) -In an alternative embodiment, support pins having grooves formed around the outer peripheral surface therefore for coupling to the first locking parts or the second locking parts are inserted into the fastening openings 211 and 212 instead of step (5502) and step (5503) is omitted.
4. First locking part formation step (3504) At this step, as shown in FIG. 3, the metal wire is connected to one side and the other side of the stent coupled to the support part 210 in such a manner as to protrude outwardly from the stent, thereby forming the first locking parts 120, 121, 122 and 123, and the first locking parts are then fixedly locked into the grooves formed around the locking part-forming pins 230 (or support pins) In this case, the first locking parts 120, 121, 122 and 123 extend from a portion of the metal wire forming the stent or protrude from the outer periphery of the stent with a separate metal wire.
5. Second locking part formation step (S505) At this step, the second locking parts 130, 131 and 132 are formed symmetrically with respect to the first locking parts 120, 121, 122 and 123 around the vertical surface with respect to the longitudinal direction of the stent. That is, the support pins 220 and 221 are coupled to the fastening openings 211 and 212 formed in the symmetrical relation with respect to the first locking parts 120, 121, 122 and 123 at the step (S502), and the locking part-forming pins 230 are coupled to the support pins 220 and 221 at the step (S503), so that at this step (5505) the second locking parts 130, 131 and 132 are formed in the same manner as the first locking parts 120, 121, 122 and 123 at the step (5504) , while having an up and down symmetrical relation with respect to the first locking part 120, 121, 122 and 123.
In this case, the second locking parts 130, 131 and 132 extend from a portion of the metal wire forming the stent or protrude from the outer periphery of the stent with a separate metal wire.
6. Cover part formation step (5506) At this step, the stent 100 is immersed into a coating solution for forming the cover parts 140 and 141, and alternatively, the coating solution is applied to one surface of the stent through spraying, thereby forming the cover parts 140 and 141. Next, the cover parts 140 and 141 are cured in an ultraviolet oven.

Claims (16)

  1. CLAIMS1. A stent comprising: a hollow cylindrical body made of a metal wire; a first locking part protruding outwardly from the body; and a second locking part protruding outwardly from the body and spaced apart from the first locking part in the longitudinal direction of the body in a symmetrical relation with respect to the first locking part.
  2. 2. A stent according to claim 1, wherein at least one of the first locking part and the second locking part includes a plurality of locking members.
  3. 3. A stent according to claim 1, wherein the first locking part includes a plurality of locking members spaced apart from each other around the outer peripheral surface of the body, and wherein the second locking part includes a plurality of locking members spaced apart from each other around the outer peripheral surface of the body, the locking members of the first locking part being offset relative to the locking members of the second locking part in the circumferential direction.
  4. 4. A stent according to claim 2 or claim 3, wherein the plurality of locking members are substantially egually spaced apart from each other around the outer peripheral surface of the body to form a row of locking members.
  5. 5. A stent according to claim 4, wherein two or more rows are formed along the longitudinal direction of the body.
  6. 6. A stent according to any preceding claim, wherein at least one of the first locking part and the second locking part protrudes outwardly fron the body at an angle of from about 00 to about 90° with respect to the outer peripheral surface of the body.
  7. 7. A stent according to any preceding claim, wherein at least one of the first locking part and the second locking part is formed from a portion of the metal wire forming the body, or from a separate metal wire.
  8. 8. Mi apparatils for manilfacturing a stent, the apparatus comprising: a support part having a cylindrical body adapted for forming the stent and having fastening openings formed on the outer peripheral surface of the body; support pins adapted to be inserted into the fastening openings to support the metal wire forming the stent in use, so that the metal wire is bent in a zig-zag configuration on the surface of the support part; and locking part-forming pins, each locking part-forming pin having at least one fixing groove formed around the outer peripheral surface thereof.
  9. 9. An apparatus according to claim 8, wherein each locking part-forming pin has an insertion hole sized and shaped to receive an end of a corresponding support pin.
  10. 10. An apparatus according to claim 8, wherein the support pins and the locking part-forming pins are integrally formed.
  11. 11. An apparatus according to any of claims 8 to 10, wherein a plurality of fixing grooves are formed along the outer peripheral surface of each locking part-forming pin in the longitudinal direction of the locking part-forming pin.
  12. 12. An apparatus for manufacturing a stent, the apparatus comprising: a support part having a cylindrical body adapted for forming the stent and having fastening openings formed on the outer peripheral surface of the body; and support pins adapted to be inserted into the fastening openings in such a manner as to protrude from the outer peripheral surface of the support part, each support pin having at least one fixing groove formed around the outer peripheral surface thereof.
  13. 13. An apparatus according to claim 12, wherein a plurality of fixing grooves are formed along the outer peripheral surface of each support pin in the longitudinal direction of the support pin.
  14. 14. A method for manufacturing a stent, the method comprising the steps of: coupling the stent to a support part having a cylindrical body; Inserting support pins into fastening openings formed on the outer peripheral surface of the body; coupling locking part-forming pins to the support pins, each locking part-forming pin having at least one fixing grooves formed around the outer peripheral surface thereof; connecting a metal wire to a first end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a first locking part, and fixedly locking the first locking part into the fixing grooves of first locking part-forming pins; and connecting a metal wire to a second end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a second locking part, and fixedly locking the second locking part into the fixing grooves of second locking part-forming pins, the second locking part being in a symmetrical relation with respect to the first locking part.
  15. 15. A method for manufacturing a stent, the method comprising the steps of: coupling the stent to a support part having a cylindrical body; inserting support pins into fastening openings formed on the outer peripheral surface of the body, each support pin having at least one fixing grooves formed around the outer peripheral surface thereof; connecting a metal wire to a first end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a first locking part, and fixedly locking the first locking part into the fixing grooves of first support pins; and connecting a metal wire to a second end of the stent in such a manner as to protrude outwardly from the stent, thereby forming a second locking part, and fixedly locking the second locking part into the fixing grooves of second support pins, the second locking part being in a symmetrical relation with respect to the first locking part.
  16. 16. A method for manufacturing a stent according to claim 14 or claim 15, wherein at least one of the first locking part and the second locking part is formed from a portion of the metal wire forming the stent, or from a separate metal wire.
GB1400089.7A 2013-01-21 2014-01-03 Stents Active GB2512176B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130006467A KR20140094144A (en) 2013-01-21 2013-01-21 Stent for preventing migration and apparatus and method thereof

Publications (3)

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GB201400089D0 GB201400089D0 (en) 2014-02-19
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DE102013221450A1 (en) 2014-07-24
FR3001123B1 (en) 2019-08-02
GB201400089D0 (en) 2014-02-19
JP5876019B2 (en) 2016-03-02
GB2512176B (en) 2016-10-05
FR3001123A1 (en) 2014-07-25
JP2014138696A (en) 2014-07-31
DE102013221450A8 (en) 2014-09-18
ES2478418B1 (en) 2015-06-18
KR20140094144A (en) 2014-07-30
ES2478418R1 (en) 2014-12-12
ES2478418A2 (en) 2014-07-21
CN103932826A (en) 2014-07-23
DE102013221450B4 (en) 2024-05-16

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