JP2555393B2 - Stenosis vessel treatment tool - Google Patents
Stenosis vessel treatment toolInfo
- Publication number
- JP2555393B2 JP2555393B2 JP63002700A JP270088A JP2555393B2 JP 2555393 B2 JP2555393 B2 JP 2555393B2 JP 63002700 A JP63002700 A JP 63002700A JP 270088 A JP270088 A JP 270088A JP 2555393 B2 JP2555393 B2 JP 2555393B2
- Authority
- JP
- Japan
- Prior art keywords
- stent
- blood vessel
- balloon
- catheter
- expanded
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （イ） 産業上の利用分野 この発明は、狭窄血管の治療具に関する。TECHNICAL FIELD The present invention relates to a treatment device for stenosed blood vessels.
（ロ） 従来の技術 従来、冠状動脈の内側に血栓が生成して、いわゆる狭
心症の症状が起きた場合、その治療法としては、血栓を
とかす薬を流し込んで血栓を除去する方法以外に、冠状
動脈中にカテーテルの先端に設けたバルーンを挿入し、
所要手段により膨張させ血栓のある動脈を拡げる治療法
が注目されている。そして、バルーンを使って広げた血
管が再度縮少しないように、血管の内側には、螺旋状の
形状記憶合金を嵌入する方法が考えられている。(B) Conventional technology Conventionally, when thrombus is formed inside the coronary artery and causes a so-called angina symptom, as a treatment method therefor, other than the method of pouring a drug that dissolves the thrombus to remove the thrombus. Insert the balloon provided at the tip of the catheter into the coronary artery,
Attention has been focused on a treatment method for expanding a thrombosed artery by expanding it by a required means. Then, a method of inserting a spiral shape memory alloy into the inside of the blood vessel is considered so that the blood vessel expanded by using the balloon does not shrink again.
（ハ） 発明が解決しようとする問題点 しかし、一たんバルーンにて広げた血管中に螺旋状の
形状記憶合金を嵌入する場合、螺旋状の形状記憶合金の
金属線の先端が先鋭状であるため、血管の内壁を損傷す
るおそれがあり、また、螺旋状であるために線間の間隔
が大きく血管内壁の拡張効果が充分でなく、治療後、漸
次生起する血管の縮少に十分に対応できない欠点があ
り、また、金属であるため重量がかさみ、血管に負担を
かけやすく、しかも治療プロセスも難しい欠点があっ
た。更には、螺旋状の形状記憶合金を血管中に嵌入する
前には、血管拡張のためにバルーンカテーテルを一たん
血管中に挿入してバルーンを膨張させなければならず、
従って、膨張バルーンを縮少してカテーテルを縫いた後
に、形状記憶合金を嵌入するという二度の作業を行うた
め、作業プロセスが煩雑で治療時間もかかる欠点があっ
た。(C) Problems to be Solved by the Invention However, when a spiral shape memory alloy is inserted into a blood vessel expanded by a balloon, the tip of the metal wire of the spiral shape memory alloy is sharp. Therefore, there is a risk of damaging the inner wall of the blood vessel.Because of the spiral shape, the distance between the lines is large, and the effect of expanding the inner wall of the blood vessel is not sufficient. In addition, it has a drawback that it is a metal, and it is heavy in weight, and it is easy to put a burden on blood vessels, and the treatment process is difficult. Furthermore, before inserting the spiral shape memory alloy into the blood vessel, a balloon catheter must be inserted into the blood vessel for the purpose of dilating the blood vessel and the balloon must be inflated.
Therefore, since the two operations of inserting the shape memory alloy after the inflation balloon is deflated and the catheter is sewn are involved, the work process is complicated and the treatment time is long.
（ニ） 問題点を解決するための手段 この発明は、カテーテルの先端部分にバルーンを膨縮
自在に設け、同カテーテルの所要位置に略筒状のステン
トを脱去自在に装着すると共に、同ステントの素材を、
加熱により記憶形状に復元する形状記憶樹脂とし、しか
も所要手段により、同ステントを加熱しうるように構成
してなる狭窄血管の治療具を提供せんとするものであ
る。(D) Means for Solving the Problems The present invention provides a balloon at the distal end of a catheter so that the balloon can be inflated and deflated, and a substantially tubular stent can be detachably mounted at a required position of the catheter. The material of
It is intended to provide a treatment tool for a stenotic blood vessel which is made of a shape memory resin which is restored to a memorized shape by heating and which can be heated by a required means.
（ホ） 作 用 この発明では、血栓が生成した血管中に、本発明の狭
窄血管の治療具を所要手段にて挿入するものであるが、
その前に、血管内周面と略同径に形状記憶させた筒状の
ステントを縮径状に形成し、カテーテルの所要位置に装
着しておき、かつ、ステントは未加熱状態としておく。
そしてカテーテルの先端部分のバルーンを血栓部分に位
置せしめ、次いで所要手段で、バルーンを膨張させて血
栓部分の血管内周面を押し拡げる。次いで所要手段によ
りバルーンを縮少し、カテーテルを移動させてステント
を押し広げた血管部分に位置せしめる。(E) Operation In the present invention, the treatment device for a stenotic blood vessel of the present invention is inserted into a blood vessel in which a thrombus has been formed by a required means.
Before that, a tubular stent having a shape memorized to have a diameter substantially the same as the inner peripheral surface of the blood vessel is formed in a reduced diameter and mounted on a required position of the catheter, and the stent is not heated.
Then, the balloon at the tip portion of the catheter is positioned at the thrombus portion, and then the balloon is inflated by necessary means to expand the inner peripheral surface of the blood vessel at the thrombus portion. Next, the balloon is contracted by a required means, and the catheter is moved to position the stent on the expanded blood vessel portion.
次いで、ヒーターその他の所要手段により、ステント
を加熱し、筒状のステントを記憶形状に復元させて拡張
し、血管内周面に嵌着状態として、ステントを治療具か
ら脱去しうる状態とし、次いで、拡張したステントを残
してカテーテルをバルーンと共に、血管中より引抜くこ
とにより、ステントのみを血管中に残留せしめて、バル
ーンにて押し広げた血管内周面にステントを嵌着するも
のである。Then, the stent is heated by a heater or other required means, the tubular stent is restored to a memory shape and expanded, and the stent is fitted to the inner peripheral surface of the blood vessel so that the stent can be removed from the therapeutic device. Next, the expanded stent is left, and the catheter is pulled out together with the balloon from the blood vessel, so that only the stent remains in the blood vessel and the stent is fitted to the inner peripheral surface of the blood vessel expanded by the balloon. .
（ヘ） 効 果 この発明によれば、筒状のステントを、所要手段の加
熱によりもとの記憶形状に復元する形状記憶樹脂にて構
成し、しかも、カテーテルに予め略筒状のステントを脱
去自在に装着したために、カテーテルの一度の挿入作業
にて、血管の膨張、ステントの装着時のすべての治療を
完了でき、治療時間の短縮ができる効果を有し、また、
略筒状のステントであるために押し拡げた血管内周面に
ステントが密着して、確実な血栓治療効果を期待でき、
またステントの素材が合成樹脂であるために軽量で加工
しやすく種々の略筒形状に構成して治療効果を更に向上
でき、また、ステントを血管拡張の記憶形状に復元する
手段に加熱を利用することにしたため、無理なくステン
トを血管内周面に密着嵌合させうる効果を有する。(F) Effect According to the present invention, the tubular stent is made of a shape memory resin that is restored to the original memory shape by the heating of the required means, and moreover, the substantially tubular stent is removed from the catheter beforehand. Since it is removably attached, it has the effect of being able to complete all the treatments when the blood vessel is expanded and the stent is attached, and the treatment time can be shortened by inserting the catheter once.
Since it is a substantially cylindrical stent, the stent adheres to the inner peripheral surface of the expanded blood vessel, and a reliable thrombosis treatment effect can be expected,
In addition, since the material of the stent is synthetic resin, it is lightweight and easy to process and can be configured into various substantially cylindrical shapes to further improve the therapeutic effect. Further, heating is used as a means for restoring the stent to the memory shape of vasodilation. Therefore, there is an effect that the stent can be closely fitted to the inner peripheral surface of the blood vessel without difficulty.
（ト） 実施例 本発明の実施例を図面にもとづき詳説すれば、第１図
において（Ａ）は本発明の狭窄血管の治療具を示してお
り、次のように構成されている。すなわち、カテーテル
（１）の先端部分に、膨縮自在にバルーン（２）を設
け、バルーン（２）の近傍としての手前部分に位置する
カテーテル周面には、後述のステント（４）を加熱する
ための所要手段として用いたヒーター（３）が装着され
ている。(G) Example To explain the example of the present invention in detail with reference to the drawings, FIG. 1 (A) shows a treatment device for a stenotic blood vessel according to the present invention, which is configured as follows. That is, a balloon (2) is provided at the distal end of the catheter (1) so as to be expandable and contractible, and a stent (4) described later is heated on the catheter peripheral surface located in the front part as a vicinity of the balloon (2). A heater (3) used as a required means for is installed.
ヒーター（３）は、ニクロム線で電気抵抗により発熱
する機構としている。The heater (3) has a mechanism in which a nichrome wire generates heat due to electric resistance.
ヒーター（３）の熱効果が及ぶ位置として、同ヒータ
ー（３）の外周には筒状のステント（４）が装着されて
いる。A tubular stent (4) is attached to the outer circumference of the heater (3) at a position where the thermal effect of the heater (3) is exerted.
なお、所要手段によるステントの加熱方法としては、
ヒーター以外にも、加熱流動体をステントに直接又は間
接に作用せしめて加熱する方法がある。As a method of heating the stent by the required means,
In addition to the heater, there is a method of heating a heated fluid by directly or indirectly acting on the stent.
ステント（４）は網状の筒体に形成されており、加熱
により記憶形状に復元する形状記憶樹脂より構成されて
いるものであり、記憶形状としては、血栓の血管を押し
拡げた際の血管の内周径と略同一外径の筒形状としてい
る。The stent (4) is formed in a net-like tubular body, and is made of a shape memory resin that restores to a memory shape by heating. As the memory shape, a blood vessel of a thrombus is expanded. It has a cylindrical shape with an outer diameter substantially the same as the inner diameter.
なお、ステント（４）は通常の網状の筒体形状に以外
にも網目に各種形状を施すことができ、また第３図に示
すように、周面を長手方向に一部切欠した略Ｃ字状とす
ることもできる。またシート状のものを螺旋状に巻回し
たものにすることもでき、また、網目ではなく筒体に多
孔穿設形状を施すこともでき、略筒状のステントには、
これらのすべてのステント構造を含んでいる。The stent (4) may have various mesh shapes other than the ordinary mesh-like tubular shape, and as shown in FIG. 3, the peripheral surface is substantially C-shaped with a part notched in the longitudinal direction. It can also be in the form of. It is also possible to make a spirally wound sheet-like one, and it is also possible to give a perforated shape to the tubular body instead of the mesh, and in a substantially tubular stent,
Includes all of these stent structures.
従って、ステント（４）は、ヒーター（３）その他の
所要手段により加熱されることによって、バルーン
（２）により押し拡げられた血管の内周面に密着嵌合し
うるようになる。Therefore, the stent (4) can be closely fitted to the inner peripheral surface of the blood vessel expanded by the balloon (2) by being heated by the heater (3) and other required means.
（５）は、カテーテル（１）の先端、すなわちバルー
ン（２）の先端に設けたガイドワイヤー、（６）は、ヒ
ーター（３）に結線した電線、（８）は血管、（Ｍ）は
血栓を示す。(5) is a guide wire provided at the tip of the catheter (1), that is, at the tip of the balloon (2), (6) is an electric wire connected to the heater (3), (8) is a blood vessel, and (M) is a thrombus. Indicates.
この発明の実施例は上記のように構成されており、使
用に際しては、本発明の狭窄血管治療具（Ａ）を所定の
手段で血管（Ｂ）中に挿入し、血栓（Ｍ）部分に押し進
めていく。そして、血栓（Ｍ）部分にバルーン（２）が
位置した時点で、所要手段、例えば生理食塩水を送水し
てバルーン（２）を膨張させて血栓生成の血管（Ｂ）を
押し拡げる。次いで生理食塩水を抜くことによりバルー
ン（２）を縮少し、カテーテル（１）を更に移動せしめ
れ、押し拡げられた血管（Ｂ）の部分にステント（４）
を位置せして、この状態でヒーター（３）に通電してス
テント（４）を加熱する。なお、前述した通り、加熱方
法はヒーター（３）以外の方法例えば、加熱食塩水の送
水、或は人体外部からの加熱等の方法で行ってもよい。The embodiment of the present invention is configured as described above, and at the time of use, the stenosis vessel treatment tool (A) of the present invention is inserted into the blood vessel (B) by a predetermined means and pushed to the thrombus (M) portion. To go. Then, when the balloon (2) is located at the thrombus (M) portion, required means, for example, physiological saline is supplied to inflate the balloon (2) and expand the blood vessel (B) for thrombus formation. Next, the balloon (2) is contracted by removing the physiological saline, and the catheter (1) is further moved, and the stent (4) is placed on the portion of the blood vessel (B) that has been expanded.
Is positioned and the heater (3) is energized in this state to heat the stent (4). As described above, the heating method may be a method other than the heater (3), for example, a method of supplying heated saline, or a method of heating from outside the human body.
ステント（４）は加熱によって、もとの記憶形状に復
元し、押し拡げた血管（Ｂ）の内周面に密着嵌合して血
栓（Ｍ）が生成した血管（３）を正常な内径状態に保持
することができる。The stent (4) is restored to its original memory shape by heating, and is closely fitted to the inner peripheral surface of the expanded blood vessel (B) to form a blood vessel (3) in which a thrombus (M) is generated in a normal inner diameter state. Can be held at.
カテーテル（１）及び縮少したバルーン（２）は加熱
により大径となったステント（４）の中空部分より引抜
いて血管外にとり去る。The catheter (1) and the deflated balloon (2) are pulled out from the hollow portion of the stent (4) having a large diameter by heating and removed from the blood vessel.
カテーテル（１）は網状の略筒体とすることにより、
血管（Ｂ）の内周面による馴染みやすく、密着し、一た
ん押し拡げられた血管の内径を確実に維持できるもので
ある。By making the catheter (1) a net-like substantially tubular body,
The inner peripheral surface of the blood vessel (B) is easy to be fitted, and the inner diameter of the blood vessel can be surely maintained while being intimately contacted and expanded.
第１図は、本発明の狭窄血管の治療具の説明図。 第２図は（１）（２）（３）（４）は、使用状態の過程
示す説明図。 第３図は、ステントの実施例を示す説明図。 （１）：カテーテル （２）：バルーン （３）：ステントFIG. 1 is an explanatory view of a treatment device for a stenotic blood vessel according to the present invention. FIG. 2 is an explanatory view showing (1), (2), (3), and (4) processes in use. FIG. 3 is an explanatory view showing an embodiment of a stent. (1): Catheter (2): Balloon (3): Stent
フロントページの続き (56)参考文献 特開 平１−94837（ＪＰ，Ａ) 特開 昭64−83251（ＪＰ，Ａ) 特開 昭62−231657（ＪＰ，Ａ) 特開 昭62−82976（ＪＰ，Ａ) 特公 昭61−6655（ＪＰ，Ｂ２)Continuation of the front page (56) Reference JP-A-1-94837 (JP, A) JP-A 64-83251 (JP, A) JP-A 62-231657 (JP, A) JP-A 62-82976 (JP , A) Japanese Patent Sho 61-6655 (JP, B2)
Claims (1)
（２）を膨縮自在に設け、同カテーテル（１）の所要位
置に略筒状のステント（４）を脱去自在に装着すると共
に、同ステント（４）の素材を、加熱により記憶形状に
復元する形状記憶樹脂とし、しかも所要手段により、同
ステント（４）を加熱しうるように構成してなる狭窄血
管の治療具。1. A balloon (2) is provided at the distal end of a catheter (1) so as to be expandable and contractible, and a substantially tubular stent (4) is detachably mounted at a required position of the catheter (1), A therapeutic device for a stenotic blood vessel, wherein the material of the stent (4) is a shape memory resin that restores to a memorized shape by heating, and the stent (4) can be heated by a required means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63002700A JP2555393B2 (en) | 1988-01-08 | 1988-01-08 | Stenosis vessel treatment tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63002700A JP2555393B2 (en) | 1988-01-08 | 1988-01-08 | Stenosis vessel treatment tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01178252A JPH01178252A (en) | 1989-07-14 |
| JP2555393B2 true JP2555393B2 (en) | 1996-11-20 |
Family
ID=11536559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63002700A Expired - Lifetime JP2555393B2 (en) | 1988-01-08 | 1988-01-08 | Stenosis vessel treatment tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2555393B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101022487B1 (en) * | 2010-05-27 | 2011-03-15 | 변기현 | Predilation balloon-stent combined catheter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2772665B2 (en) * | 1989-03-29 | 1998-07-02 | 日本ゼオン株式会社 | Living organ dilator and living organ dilator |
| JP3087809B2 (en) * | 1994-01-14 | 2000-09-11 | 富士通株式会社 | Frame structure for disk drive |
| US20050131513A1 (en) * | 2003-12-16 | 2005-06-16 | Cook Incorporated | Stent catheter with a permanently affixed conductor |
-
1988
- 1988-01-08 JP JP63002700A patent/JP2555393B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101022487B1 (en) * | 2010-05-27 | 2011-03-15 | 변기현 | Predilation balloon-stent combined catheter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01178252A (en) | 1989-07-14 |
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