JPH07185012A - Stent for extending tubular path in vivo - Google Patents
Stent for extending tubular path in vivoInfo
- Publication number
- JPH07185012A JPH07185012A JP34880793A JP34880793A JPH07185012A JP H07185012 A JPH07185012 A JP H07185012A JP 34880793 A JP34880793 A JP 34880793A JP 34880793 A JP34880793 A JP 34880793A JP H07185012 A JPH07185012 A JP H07185012A
- Authority
- JP
- Japan
- Prior art keywords
- stent
- expanding
- main
- stent body
- main body
- 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.)
- Withdrawn
Links
- 238000001727 in vivo Methods 0.000 title abstract 2
- 238000009954 braiding Methods 0.000 claims description 3
- 208000031481 Pathologic Constriction Diseases 0.000 claims 1
- 208000037804 stenosis Diseases 0.000 claims 1
- 230000036262 stenosis Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 4
- 239000013013 elastic material Substances 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 12
- 206010063560 Excessive granulation tissue Diseases 0.000 description 7
- 210000001126 granulation tissue Anatomy 0.000 description 7
- 230000009545 invasion Effects 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、血管、気管支等の生体
管路を拡張する際に使用される生体管路拡張用ステント
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stent for expanding a biological duct used for expanding a biological duct such as a blood vessel or a bronchus.
【０００２】[0002]
【従来の技術】従来、生体管路を拡張する手段として、
実開平４ー３７４４５号公報、特公平４−４７５７５号
公報などに開示された生体管路拡張用ステントがある。
これらの生体管路拡張用ステントは、内視鏡の内部を挿
通して生体管路内に挿入される円筒状のステント本体を
有し、このステント本体を径方向に拡げて生体管路を拡
張するように構成されている。2. Description of the Related Art Conventionally, as a means for expanding a biological duct,
There is a stent for expanding a biological duct disclosed in Japanese Utility Model Laid-Open No. 4-37445, Japanese Patent Publication No. 4-47575, and the like.
These stents for expanding a living body duct have a cylindrical stent body that is inserted into the living body passageway through an endoscope, and expand the stent body in the radial direction to expand the living body passageway. Is configured to.
【０００３】このような構成の生体管路拡張用ステント
は、ステント本体が複数本の線状部材を円筒状に編んで
形成されているため、ステント本体の径を任意に変化さ
せることができるとともに、ステント本体をその状態に
保持することができるという利点を持っている。In the stent for expanding a biological duct having such a structure, since the main stent body is formed by knitting a plurality of linear members in a cylindrical shape, the diameter of the main stent body can be arbitrarily changed. , Has the advantage that the stent body can be held in that state.
【０００４】しかし、上述した従来の生体管路拡張用ス
テントでは、ステント本体を形成する線状部材が金属材
料等で形成されているため、ステント本体を生体内に留
置しておくと、ステント本体との接触部に肉芽組織が発
生し、この肉芽組織によってステント本体の両端開口が
閉塞されてしまうという問題があった。However, in the above-mentioned conventional stent for expanding a biological duct, since the linear member forming the main stent body is made of a metal material or the like, if the main stent body is left in the living body, the main stent body There has been a problem that granulation tissue is generated at the contacting portion with and the openings at both ends of the stent body are blocked by the granulation tissue.
【０００５】そこで、このような問題を解消するため
に、ステント本体の両端外周部にリング状の突起部を設
け、この突起部によって肉芽組織の侵出を抑制するよう
にした生体管路拡張用ステントが考案されている。In order to solve such a problem, ring-shaped protrusions are provided on the outer peripheral portions of both ends of the main stent body, and the protrusions are used to suppress the invasion of the granulation tissue for expanding the body conduit. A stent has been devised.
【０００６】[0006]
【発明が解決しようとする課題】このような生体管路拡
張用ステントは、ステント本体の両端開口が肉芽組織に
よって閉塞されることを防止できるが、次のような問題
があった。すなわち、上述した生体管路拡張用ステント
では、ステント本体の両端外周部に設けられた突起部が
内視鏡内で引っ掛かる可能性があり、生体管路への挿入
および生体管路からの抜去に困難性を要すという問題が
あった。Such a stent for expanding a biological duct can prevent the openings at both ends of the main stent body from being blocked by granulation tissue, but has the following problems. That is, in the above-mentioned stent for expanding a biological duct, there is a possibility that the protrusions provided on the outer peripheral portions of both ends of the stent main body may be caught in the endoscope, and therefore, the insertion into the biological duct and the removal from the biological duct are difficult. There was a problem that it was difficult.
【０００７】本発明は上記のような問題点に鑑みてなさ
れたもので、その目的は生体管路への挿入および生体管
路からの抜去が容易な生体管路拡張用ステントを提供し
ようとするものである。The present invention has been made in view of the above problems, and an object of the present invention is to provide a stent for expanding a biological conduit, which can be easily inserted into and removed from the biological conduit. It is a thing.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明は、複数本の線状部材を円筒状に編組してなる
ステント本体を径方向に拡げて生体管路の狭窄部を拡張
する生体管路拡張用ステントにおいて、前記ステント本
体を径方向に拡げたときに前記ステント本体の軸方向へ
の収縮力を受けて前記ステント本体の端部外周に突起部
を形成する手段を設けたことを特徴とするものである。In order to solve the above-mentioned problems, the present invention expands a stent main body formed by braiding a plurality of linear members in a cylindrical shape in a radial direction to expand a narrowed portion of a biological duct. In the stent for expanding a biological duct, provided is a means for receiving a contracting force in the axial direction of the main stent body when the main stent body is expanded in the radial direction to form a protrusion on the outer periphery of the end of the main stent body. It is characterized by that.
【０００９】[0009]
【作用】本発明ではステント本体を径方向に拡げると、
ステント本体が軸方向に収縮する。このとき、その収縮
力を受けてステント本体の端部外周に突起部が形成され
る。In the present invention, when the main stent body is expanded in the radial direction,
The stent body contracts in the axial direction. At this time, a projecting portion is formed on the outer periphery of the end portion of the stent body by receiving the contracting force.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は、本発明の第１実施例に係る生体管
路拡張用ステントを示している。同図に示すように、こ
の生体管路拡張用ステントは、内視鏡の内部を挿通して
生体管路内に挿入されるステント本体１を備えている。
このステント本体１は複数本の金属線材２を円筒状に編
み組みして形成されており、その両端外周部には幅の狭
い弾性環状体３，４が設けられている。FIG. 1 shows a stent for expanding a biological duct according to a first embodiment of the present invention. As shown in the figure, this stent for expanding a biological duct includes a stent body 1 which is inserted into the biological duct by passing through the inside of an endoscope.
The main stent body 1 is formed by braiding a plurality of metal wires 2 in a cylindrical shape, and narrow elastic annular bodies 3 and 4 are provided on the outer peripheral portions of both ends thereof.
【００１２】前記弾性環状体３，４はシリコン等の弾性
材料からなり、その両端部のみが接着剤等によりステン
ト本体１に固定されている。The elastic annular bodies 3 and 4 are made of an elastic material such as silicon, and only their both ends are fixed to the stent body 1 with an adhesive or the like.
【００１３】なお、前記ステント本体１の両端外周部
は、弾性体３，４の外周面とステント本体１の外周面と
が同一平面となるように若干内側に絞られている。The outer peripheral portions of both ends of the stent body 1 are slightly narrowed inward so that the outer peripheral surfaces of the elastic bodies 3 and 4 and the outer peripheral surface of the stent body 1 are flush with each other.
【００１４】図２は、ステント本体１を径方向に拡げた
状態を示している。同図に示すように、ステント本体１
を径方向に拡げると、ステント本体１が軸方向に収縮す
る。このとき、ステント本体１の両端外周部に設けられ
た弾性環状体３，４は、その収縮力を受けて弾性変形
し、ステント本体１の両端外周部に突起部５，６（図２
参照）を形成する。FIG. 2 shows a state in which the main stent body 1 is expanded in the radial direction. As shown in the figure, the main stent body 1
Is expanded in the radial direction, the main stent body 1 contracts in the axial direction. At this time, the elastic annular bodies 3 and 4 provided on the outer peripheral portions of both ends of the stent main body 1 are elastically deformed by receiving the contracting force, and the protruding portions 5 and 6 (FIG. 2) are formed on the outer peripheral portions of both ends of the stent main body 1.
).
【００１５】したがって、上記のように構成される本発
明の第１実施例では、肉芽組織の侵出を抑制するために
ステント本体１の両端外周部にリング状の突起部を設け
ておく必要がないので、ステント本体１が内視鏡内で引
っ掛かるようなことがなく、ステント本体１を内視鏡を
介して生体管路に容易に挿入することができるととも
に、生体管路に挿入されたステント本体１を内視鏡を介
して生体管路から容易に抜去することができる。Therefore, in the first embodiment of the present invention configured as described above, it is necessary to provide ring-shaped protrusions on the outer peripheral portions of both ends of the stent body 1 in order to suppress the exudation of the granulation tissue. Since the stent body 1 is not caught in the endoscope, the stent body 1 can be easily inserted into the living body conduit via the endoscope, and the stent inserted in the living body conduit can be easily inserted. The main body 1 can be easily removed from the living body conduit via the endoscope.
【００１６】図３及び図４は、本発明の第２実施例に係
る生体管路拡張用ステントを示している。図３及び図４
に示すように、この生体管路拡張用ステントは、内視鏡
の内部を挿通して生体管路内に挿入されるステント本体
１を備えている。このステント本体１は複数本の金属線
材２を円筒状に編んで形成されており、その両端には先
端に球状部８を有する複数本の線状体７がステント本体
１の軸方向に沿って連設されている。FIG. 3 and FIG. 4 show a stent for expanding a biological duct according to a second embodiment of the present invention. 3 and 4
As shown in (1), this stent for expanding a biological conduit includes a stent body 1 that is inserted into the biological conduit by passing through the inside of the endoscope. The stent body 1 is formed by knitting a plurality of metal wires 2 into a cylindrical shape, and a plurality of linear bodies 7 each having a spherical portion 8 at its tip are formed along the axial direction of the stent body 1 at both ends thereof. It is lined up.
【００１７】前記線状体７は金属材料で形成されてお
り、その中間部には絞り部９が設けられている。なお、
前記線状体７はステント本体１を形成する金属線材２よ
りも剛性が高くなっている。The linear body 7 is made of a metal material, and a narrowed portion 9 is provided in the middle portion thereof. In addition,
The linear body 7 has a higher rigidity than the metal wire 2 that forms the main stent body 1.
【００１８】また、本実施例に係る生体管路拡張用ステ
ントは、外皮チューブ１０を備えている。この外皮チュ
ーブ１０は線状体７を含むステント本体１の外周を覆う
ためのものであり、ゴム等の弾性材料で形成されてい
る。Further, the stent for expanding a living duct according to the present embodiment includes an outer tube 10. The outer tube 10 covers the outer circumference of the stent body 1 including the linear body 7, and is made of an elastic material such as rubber.
【００１９】図５は、本実施例に係る生体管路拡張用ス
テントのステント本体１に圧縮力を両端側から加えた状
態を示している。同図に示すように、ステント本体１に
圧縮力を両端側から加えると、ステント本体１が径方向
に拡がり、生体管路を拡張する。このとき、線状体７
は、図５に示すように、絞り部９が設けられた部分で山
形に折れ曲がり、ステント本体１の両端外周部に突起部
１１を形成する。FIG. 5 shows a state in which a compressive force is applied from both ends to the main stent body 1 of the stent for expanding a biological conduit according to this embodiment. As shown in the figure, when a compressive force is applied to the main stent body 1 from both ends, the main stent body 1 expands in the radial direction to expand the living body conduit. At this time, the linear body 7
As shown in FIG. 5, at the portion where the narrowed portion 9 is provided, the bent portion is bent into a mountain shape, and the protruding portions 11 are formed on the outer peripheral portions of both ends of the stent body 1.
【００２０】したがって、上記のように構成される本発
明の第２実施例では、肉芽組織の侵出を抑制するために
ステント本体１の両端外周部にリング状の突起部を設け
ておく必要がないので、ステント本体１が内視鏡内で引
っ掛かるようなことがなく、ステント本体１を内視鏡を
介して生体管路に容易に挿入することができるととも
に、生体管路に挿入されたステント本体１を内視鏡を介
して生体管路から容易に抜去することができる。Therefore, in the second embodiment of the present invention configured as described above, it is necessary to provide ring-shaped protrusions on the outer peripheral portions of both ends of the stent body 1 in order to suppress the exudation of the granulation tissue. Since the stent body 1 is not caught in the endoscope, the stent body 1 can be easily inserted into the living body conduit via the endoscope, and the stent inserted in the living body conduit can be easily inserted. The main body 1 can be easily removed from the living body conduit via the endoscope.
【００２１】[0021]
【発明の効果】以上説明したように本発明は、ステント
本体を径方向に拡げたときにステント本体の軸方向への
収縮力を受けてステント本体の端部外周に突起部を形成
する手段を設けたことを特徴とするものである。したが
って、肉芽組織の侵出を抑制するためにステント本体の
両端外周部にリング状の突起部を設けておく必要がない
ので、ステント本体が内視鏡内等で引っ掛かるようなこ
とがなく、生体管路への挿入および生体管路からの抜去
が容易な生体管路拡張用ステントを提供できる。As described above, the present invention provides a means for forming a protrusion on the outer periphery of the end of a stent body by receiving a contracting force in the axial direction of the stent body when the stent body is expanded in the radial direction. It is characterized by being provided. Therefore, since it is not necessary to provide ring-shaped protrusions on the outer peripheral portions of both ends of the stent main body in order to suppress the invasion of the granulation tissue, the stent main body does not get caught in the endoscope, etc. It is possible to provide a stent for expanding a biological conduit that can be easily inserted into and removed from the conduit.
【図１】本発明の第１実施例に係る生体管路拡張用ステ
ントの概略構成図。FIG. 1 is a schematic configuration diagram of a stent for expanding a biological duct according to a first embodiment of the present invention.
【図２】同実施例に係る生体管路拡張用ステントのステ
ント本体を径方向に拡げた状態を示す図。FIG. 2 is a view showing a state in which the main body of the stent for expanding a biological duct according to the embodiment is expanded in the radial direction.
【図３】本発明の第２実施例に係る生体管路拡張用ステ
ントの構成を示す図。FIG. 3 is a view showing the structure of a stent for expanding a biological duct according to a second embodiment of the present invention.
【図４】同実施例に係る生体管路拡張用ステントの部分
詳細図。FIG. 4 is a partial detailed view of the stent for expanding a biological duct according to the embodiment.
【図５】同実施例に係る生体管路拡張用ステントの作用
説明図。FIG. 5 is an explanatory view of the action of the stent for expanding a biological duct according to the embodiment.
１…ステント本体 ３，４…弾性環状体 ７…線状体 ９…絞り部 １０…外皮チューブ DESCRIPTION OF SYMBOLS 1 ... Stent main body 3, 4 ... Elastic annular body 7 ... Linear body 9 ... Drawing part 10 ... Outer skin tube
Claims (1)
るステント本体を径方向に拡げて生体管路の狭窄部を拡
張する生体管路拡張用ステントにおいて、前記ステント
本体を径方向に拡げたときに前記ステント本体の軸方向
への収縮力を受けて前記ステント本体の端部外周に突起
部を形成する手段を設けたことを特徴とする生体管路拡
張用ステント。1. A bioconduit-expanding stent for expanding a stenosis portion of a bioconduit by expanding a stent main body formed by braiding a plurality of linear members in a cylindrical shape in the radial direction, wherein And a means for forming a protrusion on the outer circumference of the end of the main stent body when the stent main body is contracted in the axial direction when the stent is expanded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34880793A JPH07185012A (en) | 1993-12-27 | 1993-12-27 | Stent for extending tubular path in vivo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34880793A JPH07185012A (en) | 1993-12-27 | 1993-12-27 | Stent for extending tubular path in vivo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07185012A true JPH07185012A (en) | 1995-07-25 |
Family
ID=18399506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34880793A Withdrawn JPH07185012A (en) | 1993-12-27 | 1993-12-27 | Stent for extending tubular path in vivo |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07185012A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002513627A (en) * | 1998-05-05 | 2002-05-14 | ボストン サイエンティフィック リミテッド | Smooth end stent |
| EP1350485A3 (en) * | 2001-10-09 | 2004-02-04 | Olympus Optical Co., Ltd. | Stent |
| KR100448329B1 (en) * | 2001-04-10 | 2004-09-10 | 주식회사 스텐텍 | Esophageal stent |
| KR100455359B1 (en) * | 2001-04-04 | 2004-11-08 | (주) 태웅메디칼 | Self-expaniding stent |
| JP2013504375A (en) * | 2009-09-10 | 2013-02-07 | ボストン サイエンティフィック サイムド，インコーポレイテッド | Endoprosthesis comprising a filament repositioning member, ie a recovery member and a protective structure |
| US10219901B2 (en) | 1999-11-17 | 2019-03-05 | Medtronic CV Luxembourg S.a.r.l. | Prosthetic valve for transluminal delivery |
| JP2019523024A (en) * | 2016-12-15 | 2019-08-22 | ビーシーエム カンパニー，リミテッド | Method for manufacturing medical stent with enhanced end resistance and stent |
-
1993
- 1993-12-27 JP JP34880793A patent/JPH07185012A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002513627A (en) * | 1998-05-05 | 2002-05-14 | ボストン サイエンティフィック リミテッド | Smooth end stent |
| US10219901B2 (en) | 1999-11-17 | 2019-03-05 | Medtronic CV Luxembourg S.a.r.l. | Prosthetic valve for transluminal delivery |
| KR100455359B1 (en) * | 2001-04-04 | 2004-11-08 | (주) 태웅메디칼 | Self-expaniding stent |
| KR100448329B1 (en) * | 2001-04-10 | 2004-09-10 | 주식회사 스텐텍 | Esophageal stent |
| EP1350485A3 (en) * | 2001-10-09 | 2004-02-04 | Olympus Optical Co., Ltd. | Stent |
| JP2013504375A (en) * | 2009-09-10 | 2013-02-07 | ボストン サイエンティフィック サイムド，インコーポレイテッド | Endoprosthesis comprising a filament repositioning member, ie a recovery member and a protective structure |
| JP2019523024A (en) * | 2016-12-15 | 2019-08-22 | ビーシーエム カンパニー，リミテッド | Method for manufacturing medical stent with enhanced end resistance and stent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |