KR20170014684A - Stent - Google Patents

Stent Download PDF

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Publication number
KR20170014684A
KR20170014684A KR1020150108437A KR20150108437A KR20170014684A KR 20170014684 A KR20170014684 A KR 20170014684A KR 1020150108437 A KR1020150108437 A KR 1020150108437A KR 20150108437 A KR20150108437 A KR 20150108437A KR 20170014684 A KR20170014684 A KR 20170014684A
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KR
South Korea
Prior art keywords
stent
unit
stent unit
connecting portion
wires
Prior art date
Application number
KR1020150108437A
Other languages
Korean (ko)
Inventor
이영재
정소희
박재하
Original Assignee
주식회사 에스앤지바이오텍
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.)
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Application filed by 주식회사 에스앤지바이오텍 filed Critical 주식회사 에스앤지바이오텍
Priority to KR1020150108437A priority Critical patent/KR20170014684A/en
Publication of KR20170014684A publication Critical patent/KR20170014684A/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

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

Abstract

A stent according to the present invention includes a stent unit body having a plurality of holes formed on a surface thereof, a hollow portion having a hollow therein, and a connecting portion connecting the plurality of stent unit bodies.

Description

Stent {Stent}

The present invention relates to a stent, and more particularly, to a stent comprising a stent unit and a flexible connection unit for connecting the stent unit and the stent unit. The stent unit is relatively flexible compared to the stent unit, The present invention relates to a stent which is easy to apply even to a curved blood vessel or a conduit without giving an incision.

In general, when a stenosis occurs due to various causes such as sediment in a conduit which needs to secure a certain inner diameter such as a blood vessel, esophagus, pancreas or bile duct of a human body, or in the case of a surgical procedure, An expandable stent is inserted.

The stent should be smoothly compressed and expanded to facilitate insertion into the catheter. For this purpose, the stent is formed by crossing a plurality of wires or forming a plurality of holes on the surface by a laser pattern. Therefore, when the stent is placed at the stenosis site, the tissue at the stenosis site protrudes into the stent through the hole of the stent surface due to the pressure caused by the expansion of the stent. Particularly, when the stent is installed for a long time, or when the pressure due to the expansion of the stent is applied to a certain level or more, side effects such as destruction or necrosis of tissues in the stenotic region occur.

Accordingly, a number of methods for solving the above-mentioned problems have been devised. As a representative example of such a method, there is known a method of forming a film so as to seal the hole of the stent surface.

FIG. 1 is a perspective view showing a conventional stent, and FIG. 2 is a photograph showing a conventional stent. As shown in FIGS. 1 and 2, the stent 1000 includes a stent body 1100 having a plurality of holes each having a rectangular shape on a surface thereof by intersecting a plurality of wires. And a cover part 1200 for covering the hole by using a silicone or the like so as to completely prevent the tissue at the installation site from protruding into the stent body through the hole. Thus, the stent can be stably fixed to the mounting site and the tissue can be prevented from protruding into the interior of the stent body 1100.

3 is a photograph showing a state where a conventional stent is bent. In the conventional stent 1000, the stent body 1100 has the same overall shape and has the same strength and ductility. When such a stent 1000 is applied to a curved blood vessel or a conduit, there arises a problem that one side of the stent 1000 is folded as shown in part A of FIG. 3 depending on the degree of bending of the blood vessel or conduit. In this manner, when one side of the stent 1000 is folded, one side of the blood vessel or conduit is caught in the folded portion of the stent 1000, or corner portions are generated to generate a stimulus in the blood vessel or conduit, can do. Further, since the flow path is reduced in the portion where the stent 1000 is folded, there is a problem in that the purpose and function of the stent 1000, which enlarges the stenosed portion, is reduced.

In addition, the blood vessel or the conduit is caused to contract or expand due to movement of the user, body temperature, flow of blood flow, or the like. However, since the conventional stent 1000 is made of the same strength and material as described above, the stent 1000 can not be easily expanded or shrunk, and the position of the stent 1000 may change during long- There is a problem in that the stent 1000 can not flexibly cope with repeated stretching or shrinking, thereby causing a burden on the blood vessel or the conduit.

KR0267019 10

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a stent unit having a stent unit and a flexible connection unit for connecting the stent unit unit and the stent unit unit, The present invention provides a stent which is easy to apply even to a curved blood vessel or a conduit without giving a stent.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a stent comprising a plurality of holes formed in a surface thereof, a stent unit having a circumference having a hollow formed therein, and a connection unit connecting the plurality of stent unit units.

At this time, the periphery of the connection portion may have a relatively small diameter as compared with the periphery of the stent unit body.

In addition, the connecting portion may be relatively soft compared to the stent unit.

In addition, the connection part may be bent at one side.

Further, one side of the connection portion may be formed so that one side thereof is bent or curved so as to be stretchable or contractible.

The connection unit and the stent unit unit may be fabricated by crossing a plurality of wires or formed by a laser pattern. The connection unit may be formed by using a wire having a relatively thin thickness or forming a thin pattern .

The connection unit and the stent unit unit may be manufactured by crossing a plurality of wires, and the connection unit may be manufactured by crossing the wires relatively to each other in comparison with the stent unit unit.

The cover unit may further include at least a portion of the stent unit and the connection unit.

The stent of the present invention has the following effects.

First, since the connecting portion connecting the stent unit is made relatively flexible as compared with the stent unit, the stent is not folded even when it is adapted to the bent blood vessel or the conduit, and the flexible bending effect is caused by the bending of the blood vessel or conduit have.

Secondly, since the connecting portion is provided in a stretchable and contractible manner, there is an effect that a stimulus is generated in a blood vessel or a conduit or a positional change does not occur due to expansion or contraction corresponding to elongation and contraction of a blood vessel or a conduit.

Third, since the stent flexibly copes with the bending or stretching of blood vessels or ducts, it does not cause irritation to the blood vessels, and the stent can be easily expanded.

Fourth, since the connecting portion has a diameter relatively smaller than the diameter of the stent unit, migration can be performed, so that the blood or the blood flowing in the conduit can easily flow.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, And shall not be interpreted.
1 is a perspective view showing a conventional stent;
2 is a photograph showing a conventional stent;
3 is a photograph showing a state where a conventional stent is bent;
4 is a perspective view of a stent according to the present invention;
5 is a photograph of a stent according to the present invention;
6 is a perspective view of a stent with a cover portion according to the present invention;
7 is a photograph of a stent with a cover portion according to the present invention;
8 is a side view of a stent according to the present invention; And
9 is a view showing a state where the stent according to the present invention is bent.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a perspective view of a stent according to the present invention, FIG. 5 is a photograph of a stent according to the present invention, FIG. 6 is a perspective view of a stent having a cover according to the present invention, Of the stent. 4 to 7, the stent 10 according to the present invention mainly includes a stent unit 100, a connection unit 200, and a cover unit 300.

The stent unit 100 has a periphery where a hollow is formed, and the periphery is formed by a crossing of a plurality of wires or by a laser pattern. In such a stent unit 100, a plurality of holes are formed on the surface by the intersection of the wires or the laser pattern.

That is, the periphery of the stent unit 100 can be easily compressed or expanded by being configured to form a plurality of holes by the intersection of the wires or the laser pattern. In addition, when the stenosis site is installed, the inner wall of the stenosis site is stably expanded and a space in which body fluids such as blood or pancreatic juice can smoothly move is formed.

In one embodiment, the stent unit 100 of the present invention is formed through the intersection of wires, and the periphery thereof is formed into a hollow cylindrical shape having a predetermined length so that the whole cross section is circular. At this time, since the periphery is formed in a circular shape as a whole, the corner portion is not formed, so as not to stimulate the tissue of the site where the stent 10 is installed. In the present invention, for convenience of description, the stent unit body 100 is formed on the basis of the intersection of the wires. However, a plurality of holes may be formed on the surface through a laser pattern or other methods, It is obvious that any conventionally used stent can be used.

The connection unit 200 interconnects a plurality of stent unit units 100 disposed along the longitudinal direction. Any device may be used as long as the stent unit 100 can be connected to each other along the longitudinal direction. When the stent 10 is bent, it plays a role of flexing without causing folding or cornering. The connecting part 200 may be made of any material or shape as long as it can perform such a role.

For example, the connecting portion 200 is preferably formed to have a relatively higher ductility than the stent unit 100. For this, the connecting part 200 may be made of a relatively soft material as compared with the material of the stent unit 100, or may be relatively thin compared to the stent unit 100. This will be described in more detail as follows.

The stent unit 100 and the connecting portion 200 may be formed by crossing a plurality of wires or by a laser pattern as described above. When the stent unit 100 and the connection unit 200 are manufactured using a plurality of wires, the wires forming the connection unit 200 are formed to have a relatively thin thickness Wire can be used. In addition, when the stent unit 100 and the connection unit 200 are formed by laser patterns, the pattern of the connection unit 200 may be relatively thin compared to the pattern of the stent unit 100. [

In another embodiment, the stent unit 100 and the connecting unit 200 may be made of the same thickness or different materials, or may be made of different thicknesses and materials. The connecting unit 200 may be made of a material other than the stent unit 100, Can be produced by crossing the wires.

In addition, the connecting portion 200 has a shape that can extend the length while minimizing the distance of the stent unit 100 adjacent to each other. That is, the connection unit 200 can connect the adjacent stent unit 100 with a predetermined inclination relative to the longitudinal direction of the stent unit 100, and at this time, the connection unit 200 can be formed to have a gentle bend. When the stent 10 is expanded and contracted due to the bending of the connection part 200, the bending part is expanded and expanded and contracted.

Further, since one side of the connection part 200 is bent or curved, it can be more easily extended and elongated when the stent 10 is expanded and contracted. That is, when the blood vessel or the conduit is expanded or contracted, the bending or curved portion is spread on one side of the connection part 200 and can be configured to be able to expand and contract so as to correspond to the expansion and contraction of the blood vessel or conduit.

In addition to the above-described embodiments, any method may be used as long as there is a manufacturing method, material, shape change, or the like capable of flexing more flexibly than the stent unit 100 in comparison with the connecting portion 200.

8 is a side view of a stent according to the present invention. 8, the connection portion 200 is formed to have a relatively small diameter portion h as compared with the peripheral portion diameter H of the stent unit body 100. In addition, That is, the cross-section h of the connecting portion 200 has a relatively small diameter as compared with the cross-section H of the stent unit 100. Since the connecting portion 200 is formed to have a relatively small diameter as compared with the stent unit 100, migration of the stent 10 is possible since one side of the stent 10 is spaced apart from the inner wall of the blood vessel or conduit. As described above, the stent 10 is inserted into the blood vessel or the conduit such that the stent 10 can be migrated, thereby making it possible to smoothly flow the blood or the blood flowing inside the conduit.

The cover unit 300 is provided to cover at least a part of the outer circumferential surface of the stent unit unit 100 and the connection unit 200 to block the holes formed in the surfaces of the stent unit unit 100 and the connection unit 200, 100 and the hole formed in the surface of the connection part 200. [ The cover portion 300 may be any cover that is commonly used in the art, as long as the above-described objects can be achieved. Preferably, however, the outer circumferential surface of the polytetrafluoroethylene (PTFE) rod is wrapped with cloth, synthetic resin, rubber, silicone or polyurethane so that the outer diameter of the stent unit 100 and the outer diameter It is preferable to manufacture and use a pipe-shaped film having

The cover part 300 may be formed by dipping the stent 10 made of the stent unit 100 and the connecting part 200 by dipping into liquid silicone, polyurethane or the like.

It is possible to cover at least a part of the outer circumferential surface of the stent 10 made up of the stent unit 100 and the connecting part 200 so as to prevent the holes formed in the surface of the stent unit unit 100 and the connecting part 200, Method may be used.

As described above, at least one of the stent unit units 100 positioned at both longitudinal ends of the stent 10, which is formed so that the stent unit 100 and the connection unit 200 are sequentially repeated, An extension (not shown) having a large area can be formed. That is, since the expanding portion is formed, the stent 10 can be stably fixed to the installation site of the conduit.

The extending portion may be formed to be stepped at the central portion, or may be formed to be inclined so that the area gradually increases toward the outside. In the case where the expanding portion is formed so as to be stepped, it can be formed by a plurality of stepped portions whose area gradually widens toward the outside, thereby reducing the sense of impression felt by the operator when the stent 10 is installed.

9 is a view showing a state where the stent according to the present invention is bent. The stent 10 having the above-described configuration is configured such that the connecting portion 200 is made relatively flexible as compared with the stent unit 100 and can be stretched and contracted. Therefore, as shown in Fig. 9, The folding does not occur as in the conventional stent 1000 shown in Fig. 3, and it can be bent flexibly. Accordingly, even when applied to a curved blood vessel or conduit, it can be easily inserted and used without irritating the blood vessel or conduit.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: stent
100: stent unit
200: Connection
300:
1000: Conventional stent
1100: Conventional stent body
1200: Conventional cover part

Claims (8)

A stent unit body having a plurality of holes formed on a surface thereof and having a circumference portion having a hollow formed therein; And
A connecting unit connecting the plurality of stent unit bodies;
/ RTI > The method according to claim 1,
And a circumferential portion of the connecting portion has a relatively small diameter as compared with a circumferential portion of the stent unit. The method according to claim 1,
Wherein the connecting portion is relatively soft compared to the stent unit. The method according to claim 1,
Wherein the connecting portion is bent at one side. The method according to claim 1,
Wherein one side of the connection portion is formed to bend or bend at one side so as to be able to expand and contract. The method according to claim 1,
The connecting portion and the stent unit body are each formed by crossing a plurality of wires or formed by a laser pattern,
Wherein the connecting portion uses a wire having a relatively thin thickness as compared with the stent unit, or the stent is formed in a thin pattern. The method according to claim 1,
The connecting portion and the stent unit body are manufactured by crossing a plurality of wires,
Wherein the connecting portion is formed by crossing the wires relatively to each other in comparison with the stent unit. The method according to claim 1,
And a cover portion provided to surround at least a portion of the stent unit and the connection portion.
KR1020150108437A 2015-07-31 2015-07-31 Stent KR20170014684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150108437A KR20170014684A (en) 2015-07-31 2015-07-31 Stent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150108437A KR20170014684A (en) 2015-07-31 2015-07-31 Stent

Publications (1)

Publication Number Publication Date
KR20170014684A true KR20170014684A (en) 2017-02-08

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KR1020150108437A KR20170014684A (en) 2015-07-31 2015-07-31 Stent

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100267019B1 (en) 1998-05-15 2001-09-22 김서곤 Stent for expanding body's lumen and method for manufacturing the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100267019B1 (en) 1998-05-15 2001-09-22 김서곤 Stent for expanding body's lumen and method for manufacturing the same

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