KR20160126548A - Double stent - Google Patents

Double stent Download PDF

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Publication number
KR20160126548A
KR20160126548A KR1020150057734A KR20150057734A KR20160126548A KR 20160126548 A KR20160126548 A KR 20160126548A KR 1020150057734 A KR1020150057734 A KR 1020150057734A KR 20150057734 A KR20150057734 A KR 20150057734A KR 20160126548 A KR20160126548 A KR 20160126548A
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KR
South Korea
Prior art keywords
stent
double stent
hollow cylindrical
cylindrical shape
double
Prior art date
Application number
KR1020150057734A
Other languages
Korean (ko)
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KR101753203B1 (en
Inventor
원유동
이수림
한종현
박헌국
장봉석
윤호
문종필
정민영
Original Assignee
주식회사 엠아이텍
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Publication date
Application filed by 주식회사 엠아이텍 filed Critical 주식회사 엠아이텍
Priority to KR1020150057734A priority Critical patent/KR101753203B1/en
Publication of KR20160126548A publication Critical patent/KR20160126548A/en
Application granted granted Critical
Publication of KR101753203B1 publication Critical patent/KR101753203B1/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
    • A61F2/82—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
    • A61F2002/91508—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 the meander having a difference in amplitude along the band

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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)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The present invention relates to a double stent comprising: a first body provided in a hollow cylindrical shape by intersection of metal wires; And a second body formed in a hollow cylindrical shape by intersection between the first body and the metal wire and formed to have a shorter length than the first body, and the second body is installed to surround the outer circumferential surface of the first body . Here, a coating is formed so as to contact the inner surface of the first body only on the inner side of the first body.
Through this, the double stent can increase the inflating force required for enlarging the diameter of the narrowed stenosis site, thereby widening the stenosis site as well as providing higher mobility.

Description

Double stent {DOUBLE STENT}

The present invention relates to a dual stent.

In general, the stent placed in the same lumen as the lesion in which the stenosis occurs is expanded to maintain a constant shape, thereby restoring the diameter of the lumen narrowed by the stenosis and ensuring the movement path for smoothly moving the mass to the expanded lumen Role.

In the case of such a stent, various requirements must be considered for ideal role fulfillment. Among these requirements, the stent is installed on the lesion site and is not easily separated. It has high movement preventing property to maintain the installation position for a long time, The radial force acting in the radial direction of the stent to restore the diameter of the lumen by pushing the lumen to the diameter of the lumen; the high flexibility required to allow the stent to be installed and expanded appropriately to the shape of the lumen; A reduction rate of the stent length required for ensuring the precise mounting position of the stent, and the size and shape of the cells forming the space between the metal wires.

Various stents suitable for the lesion-causing stenosis have been developed in consideration of these various conditions. Prior art documents related to such stents include a stent of Korean Patent Laid-Open Publication No. 10-2013-0080016 ).

However, in the conventional technique, there is a problem that the stent is separated and the sufficient expansion force is not provided by expanding the stenosis region using only one stent layer formed by weaving the metal wire. In order to solve such a problem, The conventional stent formed by adding the member and the cover layer causes a complication in the overall structure. As a result, the stent is inserted into the body and inserted into the body cavity, thereby restricting the diameter of the lumen. There is a problem that a lot of cost and time must be invested.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an apparatus and a method for preventing stenosis, which can prevent stenosis from moving in a radial direction of the stent, And to provide a technology that can increase it.

According to an aspect of the present invention, there is provided a double stent comprising: a first body provided in a hollow cylindrical shape by intersection of metal wires; And a second body formed in a hollow cylindrical shape by intersection between the first body and the metal wire and formed to have a shorter length than the first body, and the second body is installed to surround the outer circumferential surface of the first body .

Here, a coating is formed on the inner side of the first body so as to be in contact with the inner side of the first body.

The first body may include a body portion formed in a hollow cylindrical shape; A first expanding part formed at one end of the body part with an expanded diameter relative to the body part; And a second bulging portion formed at the other end of the body portion with a diameter larger than that of the body portion, and the second body is installed to surround the outer circumferential surface of the body portion.

In addition, the second body is shorter than the body so as to be positioned on the outer circumferential surface of the body.

The present invention has the following effects.

First, since the stent positioned on the outer side of the stent provided in the dual structure is located in the center of the body of the stent positioned on the inner side, the inflating force required for enlarging the diameter of the narrowed stent can be further increased, .

Secondly, only the stent disposed on the inner side forms a coating structure, and the stent located on the outer side and in contact with the stenotic region is composed of metal wires alone without forming a coating structure, thereby further enhancing the movement prevention of the entire stent.

1 is a perspective view showing a double stent according to the present invention.
2 is an exploded perspective view showing a double stent according to the present invention.
3 is a front view showing a double stent according to the present invention.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which the technical parts already known will be omitted or compressed for the sake of brevity.

<Description of components and action of the double stent>

Referring to FIGS. 1 to 3, the dual stent 100 of the present invention includes a first body 110; And a second body (120).

The first body 110 forms a plurality of cells by crossing the metal wires and is provided in a hollow cylindrical shape. Here, the first body 110 is more specifically a body part 110A located at the center as shown in FIG. 3 and provided in a hollow cylindrical shape; A first bulging portion 110B formed at one end of the body portion 111 to have a diameter expanded to a diameter of the body portion 110A; And a second expanding part 110C formed at the other end of the body part 110A with a diameter expanded to a diameter of the body part 110A.

The plurality of cell structures opened by the shape of the first body 110 and the intersection of the wires constituting the first body 110 are not limited to a specific shape and may be variously formed.

The second body 120 forms a plurality of cells by crossing the metal wires and is provided in a hollow cylindrical shape. However, the second body 120 is shorter than the first body 110 and is installed to surround the outer circumference of the first body 110 as shown in FIG.

Here, the second body 120 is installed on the outer circumference of the first body 110 to be fixed. In this type of installation, the wires of the second body 120 penetrate through the open spaces of the cells formed in the first body 110, and are intertwined to each other to be intertwined. It is preferable that the second body 120 and the first body 110 are located at both ends of the second body 120. However, It can be implemented in various forms for stable connection.

As shown in FIG. 3, the installation position of the second body 120 on the outer circumferential surface of the first body 110 is more specifically a body 110A in the first body 110, The length of the body 2 is also shorter than the length of the body 110A and more preferably is a length enough to cover one end of the body 110A from the center of the body 110A.

Accordingly, the double stent 100 is installed in the stenosed region where the lesion occurs, so that the central body portion, which has to directly restore the diameter by restoring the stenosis region outward, is provided with two layers, Force can be provided.

In other words, a sufficient diameter can be easily ensured as the stent area pushing the lesion-causing stenosis provides a stronger force.

The first body 110 is provided with a coating 115 so as to be in contact with the inner surface of the first body 110. The coating 115 is formed only on the first body 110 to prevent restenosis on the stent installation site due to the expansion of the lesion. do.

However, the second body 120 is not provided with a coating structure on the inner side or the outer side, and is provided only with the interwoven structure formed through the metal wire.

That is, the double stent 110 is formed by covering the inner surface of the first body 110 with a film as shown in a portion A-A 'shown in an enlarged cross-sectional view in Fig. 1, And a second body 120 formed on the outer surface of the body 110 through a crossing of wires without a film structure.

The second body 120 formed through the crossing of the metal wires without the film structure has a higher movement prevention property than the stent form provided on the stenosed region and has the first body 120 enclosing the second body 120, (110) can also be interlocked with each other to provide a higher anti-movement property, resulting in an increase in the prevention of movement of the entire double stent (100).

Here, the coating may be selected from PTFE (Polytetrafluoroethylene), silicone, polyurethane, polyester, polypropylene, polyethylene, polyolefin, HDPE (high density polyethylene), and expanded PTFE &Lt; / RTI &gt; may be selected within the range of known materials.

In addition, at least one of the first body 110 and the second body 120 may include one or more radiopacity indicators for securing the visibility of the double stent 100 installed in the body.

Herein, the radiopaque indicator secures the visibility when inserting the double stent 100 through the examination using radiation such as X-rays, so that the double stent 100 can be accurately positioned at the stenosis site.

The embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection is to be construed in accordance with the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

100: double stent
110: first body
115: Coating
110A:
110B: first expansion portion
110C: second expansion portion
120: second body

Claims (4)

A first body provided in a hollow cylindrical shape by intersection of metal wires; And
And a second body provided in a hollow cylindrical shape by intersection of the metal wires and formed to have a shorter length than the first body,
And the second body is installed so as to surround the outer circumferential surface of the first body.
Double stent.
The method according to claim 1,
And a coating is formed on the inner side of the first body so as to contact the inner side of the first body.
Double stent.
3. The method of claim 2,
The first body may include:
A body portion formed in a hollow cylindrical shape;
A first expanding part formed at one end of the body part with an expanded diameter relative to the body part; And
And a second expanding portion formed at the other end of the body portion with an expanded diameter relative to the body portion,
And the second body is installed so as to surround the outer circumferential surface of the body part
Double stent.
The method of claim 3,
And the second body is shorter than the body so as to be positioned on an outer circumferential surface of the body.
Double stent.
KR1020150057734A 2015-04-24 2015-04-24 Double stent KR101753203B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150057734A KR101753203B1 (en) 2015-04-24 2015-04-24 Double stent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150057734A KR101753203B1 (en) 2015-04-24 2015-04-24 Double stent

Publications (2)

Publication Number Publication Date
KR20160126548A true KR20160126548A (en) 2016-11-02
KR101753203B1 KR101753203B1 (en) 2017-07-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230003874A (en) 2021-06-30 2023-01-06 (재)예수병원유지재단 Stent graft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102235960B1 (en) * 2019-05-30 2021-04-02 박성욱 Length adjustable Stent for Lumen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100988816B1 (en) 2008-01-29 2010-10-20 신경민 A stent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230003874A (en) 2021-06-30 2023-01-06 (재)예수병원유지재단 Stent graft

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