【発明の詳細な説明】［産業上の利用分野］本発明は、血管、消化管もしくは気管等の管状器官内腔
の内径確保用器具に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an instrument for securing the inner diameter of a tubular organ such as a blood vessel, digestive tract or trachea.
［従来の技術］従来、例えば冠動脈の狭搾部を血管拡張カテーテルで拡
張して留置した後、その部分の再狭搾を防止する等のた
めに、管状器官の内腔の内径を確保する内径確保用器具
（ステント）が提案されている。[Prior Art] Conventionally, for example, after dilating and indwelling a narrowed part of a coronary artery with a vasodilator catheter, the inner diameter of the inner lumen of a tubular organ is secured to prevent re-narrowing of the narrowed part of the coronary artery. A securing device (stent) has been proposed.
従来の内径確保用器具として、特公昭８１−８６５５号
公報に記載のものは、Ｔｉ−Ｎｉ系合金からなる一方向
性形状記憶合金を用い、これを予め正常な血管内径と略
等しい内径をもつ管状に成形してこの形状を記憶させ、
これをさらに血管内への挿入を容易とすべく外径を小さ
く変形して血管の所望位置に導入後、温水等にて加熱し
て記憶形状に拡張復元して用いるようになっている。As a conventional device for securing the inner diameter, the one described in Japanese Patent Publication No. 8655/1983 uses a unidirectional shape memory alloy made of a Ti-Ni alloy, which has an inner diameter that is approximately equal to the normal blood vessel inner diameter. Molded into a tubular shape and memorized this shape,
In order to further facilitate insertion into the blood vessel, the outer diameter is deformed to a smaller size, and after introduction into the desired position of the blood vessel, it is heated with hot water or the like to expand and restore the memorized shape before use.
［発明が解決しようとする問題点］ところで、上記従来の内径確保用器具を例えば血管の目
的部位に留置する作業は、該内径確保用器具−をカテー
テルの先端に装着し、これをｘ１１造影下で血管内の目
的部位に向けて導入することによる。したがって、内径
確保用器具を血管等の管状器官内における目的部位に確
実に導入して留置させるためには、該内径確保用器具の
Ｘ線に対する高造影性が望まれる。[Problems to be Solved by the Invention] Incidentally, the work of indwelling the above-mentioned conventional device for securing an internal diameter at a target site of a blood vessel, for example, involves attaching the device for securing an internal diameter to the tip of a catheter, and placing it under x11 contrast imaging. by introducing it toward the target site within the blood vessel. Therefore, in order to reliably introduce and indwell a device for securing an internal diameter into a target site within a tubular organ such as a blood vessel, it is desired that the device for securing an internal diameter have high contrast performance with respect to X-rays.
しかしながら、内径確保用器具は例えば血管内に留置さ
れてその内径を確保し、血栓等の発生を招くことなく安
定した血流を確保しなければならない等の本来的機能の
故に、非常に薄肉とされているため、造影性に乏しい。However, devices for securing the inner diameter must be placed inside the blood vessel to secure the inner diameter and ensure stable blood flow without causing thrombus formation, etc., so they are extremely thin. Because of this, contrast performance is poor.
また、内径確保用器具を構成する形状記憶合金は例えば
Ｔｉ−Ｎｉ系合金におけるように材質的にも高造影性を
有するとは言い難い。In addition, it is difficult to say that the shape memory alloy that constitutes the inner diameter securing device has high contrast properties, unlike, for example, a Ti-Ni alloy.
本発明は、Ｘ線に対する造影性の高い形状記憶合金製内
径確保用器具を提供し、該内径確保用器具を管状器官内
の目的部位に確実に導入、留置させることを目的とする
。An object of the present invention is to provide an inner diameter securing instrument made of a shape memory alloy with high contrast properties against X-rays, and to reliably introduce and indwell the inner diameter securing instrument at a target site within a tubular organ.
［問題点を解決するための手段］本発明は、形状記憶合金製筒状体からなる管状器官内腔
の内径確保用器具において、筒状体の少なくとも一部に
Ｘ線による造影性を高める処置を施すようにしたもので
ある。[Means for Solving the Problems] The present invention provides an instrument for securing the inner diameter of a tubular organ made of a cylindrical body made of a shape-memory alloy, and includes a treatment for increasing X-ray contrast in at least a portion of the cylindrical body. It was designed to do this.
また、本発明は、上記造影性を高める処置として、該形
状記憶合金より高密度の金属をメッキもしくは圧着する
ようにしたものである。Further, in the present invention, as a treatment for enhancing the contrast property, a metal having a higher density than the shape memory alloy is plated or crimped.
［作用］本発明による形状記憶合金製内径確保用器具は、血管等
の管状器官内の目的部位にＸ線造影下で導入された後、
■外力により拡張され、もしくは■温度変化に基づく記
憶形状への回復効果により拡張され、管状器官の内腔の
内径を確保する。[Function] After the shape memory alloy inner diameter securing device according to the present invention is introduced into a target site within a tubular organ such as a blood vessel under X-ray contrast,
■It is expanded by an external force, or ■It is expanded by the effect of restoring its memorized shape based on temperature changes, thereby securing the inner diameter of the lumen of the tubular organ.
しかして、上記内径確保用器具は、その筒状体の少なく
とも一部に該形状記憶合金より高密度の金属をメッキも
しくは圧着する等により、Ｘ線に対する造影性を高めら
れている。したがって、管状器官内に導入される内径確
保用器具はＸ線にて確実に造影され、管状器官内の目的
部位に確実に導入、留置せしめられる。Therefore, the above-mentioned inner diameter securing device has improved contrastability against X-rays by plating or crimping a metal with a higher density than the shape memory alloy on at least a portion of the cylindrical body. Therefore, the inner diameter securing instrument introduced into the tubular organ is reliably imaged with X-rays, and is reliably introduced and placed at the target site within the tubular organ.
なお、本発明の内径確保用器具に対する形状記憶合金と
しては、例えばＴｉ−Ｎｉ系合金（組成：Ｎｉ５０〜５
３原子％好ましくはＮｉ５０〜５１原子％、変態温度：
３０〜４５℃）が好適である。In addition, as the shape memory alloy for the inner diameter securing device of the present invention, for example, Ti-Ni alloy (composition: Ni50-5
3 at.% Ni, preferably 50 to 51 at.%, transformation temperature:
30-45°C) is suitable.
また、本発明においてＸ線造影性を高めるために用いら
れる。形状記憶合金より高密度の金属としては、例えば
Ｃｕ、Ａｇ、 Ｐｔ、 Ａｕ等が好適である。It is also used in the present invention to enhance X-ray contrast properties. For example, Cu, Ag, Pt, Au, etc. are suitable as metals having a higher density than the shape memory alloy.
［実施例］第１図（Ａ）、（Ｂ）は本発明の第１実施例に係る内径
確保用器具を示す側面図、第２図は留置用カテーテルを
示す断面図、第３図は回収用カテーテルを示す断面図、
第４図（Ａ）は内径確保用器具の導入状態を示す模式図
、第４図（Ｂ）は内径確保用器具の留芒状態を示す模式
図、第４図（Ｃ）は内径確保用器具の回収状態を示す模
式図、第５図（Ａ）、（Ｂ）は本発明の第２実施例に係
る内径確保用器具を示す斜視図、第６尚（Ａ）、（Ｂ）
は本発明の第３実施例に係る内径確保用器具を示す斜視
図、第７図（Ａ）、（Ｂ）は本発明の第４実施例に係る
内径確保用器具を示す斜視図である。[Example] Figures 1 (A) and (B) are side views showing an inner diameter securing device according to the first example of the present invention, Figure 2 is a sectional view showing an indwelling catheter, and Figure 3 is a retrieval catheter. A cross-sectional view showing a catheter for
Figure 4 (A) is a schematic diagram showing the introduced state of the instrument for securing the inner diameter, Figure 4 (B) is a schematic diagram showing the state of the retainer of the instrument for securing the inner diameter, and Figure 4 (C) is a schematic diagram showing the state of the instrument for securing the inner diameter. FIGS. 5(A) and 5(B) are perspective views showing the inner diameter securing instrument according to the second embodiment of the present invention, and FIGS. 6(A) and 6(B)
7A and 7B are perspective views showing an inner diameter securing device according to a fourth embodiment of the present invention. FIG.
内径確保用器具（以下ステツ））１０は、温度変化にと
もなって径方向に寸法変化をし得る一方向性形状記憶合
金にて実質的に筒状、この例ではコイル状に形成されて
なり、そのステツ）１０の母相における径が管状器官、
この例では血管１１の内径より小さく設定されている（
第１図（Ａ）参照）、また、この例では、ステント１０
を構成している形状記憶合金の変態温度が体温より高い
温度に設定され、ステント１０を体温より高い温度にて
径変化させるようになっている。また、ステントｌＯは
外力により径方向に拡張できる（第１図（Ｂ）参照）、
ここで、一方向性形状記憶合金とは、変態温度を有し、
この温度以上になると母相の予め記憶させていた形状に
変化するものを言い、変態温度以下では自由に変形でき
、変態温度以上となり記憶形状に復元するとその後変態
温度以下になっても外力を加えないかぎり記憶形状を維
持するものをいう。The inner diameter securing device (hereinafter referred to as STETSU) 10 is formed into a substantially cylindrical shape, in this example a coil shape, from a unidirectional shape memory alloy that can change dimensions in the radial direction with temperature changes, Its status) The diameter in the parent phase of 10 is a tubular organ,
In this example, it is set smaller than the inner diameter of the blood vessel 11 (
(see FIG. 1(A)), and in this example, the stent 10
The transformation temperature of the shape memory alloy constituting the stent 10 is set at a temperature higher than body temperature, and the diameter of the stent 10 is changed at a temperature higher than body temperature. In addition, the stent IO can be expanded in the radial direction by external force (see Fig. 1 (B)).
Here, the unidirectional shape memory alloy has a transformation temperature,
When the temperature exceeds this temperature, the shape changes to the shape stored in the matrix in advance. Below the transformation temperature, it can be freely deformed, and when the temperature rises above the transformation temperature and restores the memorized shape, external force is applied even after the temperature falls below the transformation temperature. It refers to something that maintains its memorized shape unless otherwise specified.
さらに、上記ステン）１０は、その筒状体の先端部を高
造影部１０ａとしている。高造影部１０ａは、該ステン
ト１０を構成している形状記憶合金より高密度の金属（
例えばＣｕ、 Ａｇ、 Ｐｔ、 Ａｕ）をメッキもしく
は圧着することにて形成される。なお、ステント１０は
、その筒状体の後端部を高造影部とされ、またはその筒
状体の中間部を高造影部とされ、またはその筒状体の任
意の２以上の局部を高造影部とされ、またはその筒状体
の全体を高造影部とされてもよい。Furthermore, the above-mentioned stainless steel 10 has a high contrast portion 10a at the tip of its cylindrical body. The high-contrast region 10a is made of metal (
For example, it is formed by plating or press-bonding Cu, Ag, Pt, Au). In addition, the stent 10 has a high contrast area at the rear end of the cylindrical body, a high contrast area at the middle part of the cylindrical body, or a high contrast area at any two or more local parts of the cylindrical body. The contrast area may be used as a contrast area, or the entire cylindrical body may be used as a high contrast area.
しかして、上記ステント１０を管状器官の所望位置に留
置するには、例えば第２図に示す留置用カテーテル２０
が用いられる。留置用カテーテル２０は、先端部にバル
ーン２１を備えており、主通路２２に挿通されるガイド
ワイヤ（第４図（Ａ）、（Ｂ）の２８）にて管状器官の
所望部位にガイドされ、注液用副通路２３に供給される
バルーン膨張用液体にてバルーン２１を拡張され、バル
ーン２１の周囲に予め被着されている縮径状態のステン
ト１０に拡張外力を付与できるようになっている。なお
、主通路２２のハブにはガイドワイヤを通し血液等の洩
れを防市するための逆市弁２４が設けられている。２５
は液体注入器である。２７はバルーン２１の内部空間に
連通ずる排気用副通路であり、通路２７の基端部には三
方活栓２６等が設けられている。In order to indwell the stent 10 at a desired position in the tubular organ, for example, an indwelling catheter 20 as shown in FIG.
is used. The indwelling catheter 20 is equipped with a balloon 21 at its distal end, and is guided to a desired site in a tubular organ by a guide wire (28 in FIGS. 4(A) and 4(B)) inserted through a main passage 22. The balloon 21 is expanded by the balloon inflation liquid supplied to the liquid injection sub-channel 23, and an external expansion force can be applied to the stent 10 in a reduced diameter state, which is previously attached around the balloon 21. . Note that the hub of the main passage 22 is provided with a reverse valve 24 for passing the guide wire and preventing leakage of blood or the like. 25
is a liquid injector. Reference numeral 27 denotes a sub-passage for exhaust that communicates with the internal space of the balloon 21, and a three-way stopcock 26 or the like is provided at the base end of the passage 27.
さらに、上記ステントｌＯを留置後に、回収（もしくは
留置位置を変更）するには、例えば第３図に示す回収用
カテーテル３０が用いられる。Furthermore, in order to retrieve (or change the indwelling position) the stent IO after it is indwelled, a retrieval catheter 30 shown in FIG. 3, for example, is used.
回収用カテーテル３０は、先端部に側孔３１を備えてな
り、主通路３２に挿通されるガイドワイヤ（第４図（Ｃ
）の３７）にて管状器官内のステント留置部位にガイド
され、注液用副通路３３から主通路３２に供給されるス
テント加熱液を側孔３１から流出し、側孔６１の周囲に
位置する拡張状態のステントを変態温度以上に加熱して
、母相の記憶形状に復元すなわち縮径させるようになっ
ている。なお、主通路３２のハブにはガイドワイヤを通
し血液等の洩れを防止するための逆止弁３４が設けられ
、副通路３３のハブにはステント加熱液を注入するため
の三方活栓２６が設けられる。The recovery catheter 30 is equipped with a side hole 31 at its distal end, and has a guide wire inserted through the main passage 32 (Fig.
), the stent heating liquid that is guided to the stent indwelling site in the tubular organ and supplied to the main passage 32 from the liquid injection sub passage 33 flows out from the side hole 31 and is located around the side hole 61. The expanded stent is heated above its transformation temperature to restore the memorized shape of the matrix, that is, to reduce its diameter. Note that the hub of the main passage 32 is provided with a check valve 34 for passing the guide wire and preventing leakage of blood, etc., and the hub of the sub passage 33 is provided with a three-way stopcock 26 for injecting stent heating liquid. It will be done.
次に、上記ステント１０の作用について説明する。Next, the operation of the stent 10 will be explained.
上記ステント１０によれば、その形状記憶合金の変態温
度以下の状態下で、ステント１０を血管１１の内径より
小径に変形し第４図（Ａ）に示す如く留置用カテーテル
２０の先端バルーン２１に被着して血管ｔｉの所望位置
にＸ線造影下で導入後、ステントｌＯをバルーン２１の
拡張に基づく外力の作用により第４図（Ｂ）の如く拡径
して留置し、血管１１の内径を確保する。According to the stent 10, the stent 10 is deformed to a diameter smaller than the inner diameter of the blood vessel 11 under conditions below the transformation temperature of the shape memory alloy, and is inserted into the distal end balloon 21 of the indwelling catheter 20 as shown in FIG. 4(A). After being adhered and introduced into the desired position of the blood vessel 11 under X-ray contrast, the stent 10 is expanded in diameter as shown in FIG. ensure that
次に、上記ステントｌＯの回収時、留置位置の変更時に
は、第４図（Ｃ）に示す如く、Ｘ線造影下で、先端部に
側孔３１を有する回収用カテーテル３０をステントｌＯ
の留置位置まで導入しその側孔３１より形状記憶合金の
変態温度以上の濠を排出することにより、ステント１０
を変態温度以上として記憶形状に復元すなわち血管１１
の内径より縮径させ、ステントｌＯを回収用カテーテル
３０の先端部に巻付ける等の状態で該カテーテル３０の
移動とともに移動可能とする。Next, when retrieving the stent 1O and changing the indwelling position, as shown in FIG.
Stent 10
Restoration to the memory shape with the temperature above the metamorphosis temperature, that is, the blood vessel 11
The inner diameter of the stent 10 is reduced from the inner diameter of the stent 10, so that the stent 1O can be moved as the catheter 30 moves, such as by wrapping it around the distal end of the recovery catheter 30.
すなわち、上記ステント１０によれば、血管１１の内部
で一旦拡張させた場合でも再び自由に縮小させることが
でき、したがって留置位置からの回収が可能であるとと
もに、拡張後における留置位置の変更も自由にできる。That is, according to the stent 10, even if it is once expanded inside the blood vessel 11, it can be freely contracted again, and therefore it can be recovered from the indwelling position, and the indwelling position can be changed freely after expansion. Can be done.
さらに、上記ステントｌＯは、その筒状体の少なくとも
一部にその形状記憶合金より高密度の金属をメッキもし
くは圧着することにて形成される高造影部１０ａを付与
され、これによりＸ線に対する造影性を高められている
。したがって、血管１１の内部に導入されるステン）１
０はＸ線にて確実に造影され、血管１１の内部の目的部
位に確実に導入、留置せしめられる。Furthermore, the stent 1O is provided with a high contrast area 10a formed by plating or crimping a metal with a higher density than the shape memory alloy on at least a part of the cylindrical body, thereby providing a high contrast area 10a for X-rays. Her sexuality is enhanced. Therefore, the stencil introduced into the blood vessel 11)1
0 can be reliably contrasted with X-rays, and can be reliably introduced and placed at the target site inside the blood vessel 11.
なお、本発明のステントが備える形状記憶特性としては
、上記ステント１０におけるような形状記憶特性に限ら
ず、「２つの変態温度を有し高温側と低温側の２つの記
憶形状を可逆的に発現する二方向性形状記憶合金により
１体温または体温近傍では径方向に拡張して血管等の内
径を確保し、体温または体温近傍より低い温度では径方
向に収縮して血管等の内部を移動できる特性」等、他の
特性によるものであってもよい。The shape memory properties of the stent of the present invention are not limited to the shape memory properties of the stent 10 described above; The bidirectional shape memory alloy has the property of expanding radially at or near body temperature to secure the inner diameter of blood vessels, etc., and contracting radially at or below body temperature to move inside blood vessels, etc. ”, etc. may also be based on other characteristics.
また、本発明のステントが備える形状としては、上記第
１実施例に係るコイル状ステン）１０の他、実質的に筒
状をなすものが広く含まれる。In addition to the coiled stent 10 according to the first embodiment, the stent of the present invention has a wide range of shapes including substantially cylindrical shapes.
ここで、実質的に筒状とは、管状器官内腔を拡張してそ
の拡張状態を維持できる程度に、内腔の少なくとも一部
に接する外面を備えるものをいう。Here, the term "substantially cylindrical" refers to one having an outer surface in contact with at least a portion of the lumen to the extent that the lumen of the tubular organ can be expanded and maintained in the expanded state.
すなわち、第２実施例に係るステント４０は、第５図（
Ａ）の縮径状態と第５図（Ｂ）の拡径状態とに変化する
断面渦巻状にて構成されている。４０ａは高造影部であ
る。That is, the stent 40 according to the second embodiment is shown in FIG.
It has a spiral cross-section that changes between the diameter-reduced state shown in A) and the enlarged-diameter state shown in FIG. 5(B). 40a is a high contrast area.
また、第３実施例に係るステント５は、第６図（Ａ）の
縮径状態と第６図（Ｂ）の拡径状態とに。Furthermore, the stent 5 according to the third embodiment is in a reduced diameter state as shown in FIG. 6(A) and in an expanded diameter state as shown in FIG. 6(B).
変化する長手方向にスリットの入った管状にて構成され
ている。５０ａは高造影部である。It is constructed of a tubular shape with slits in the varying longitudinal direction. 50a is a high contrast area.
また、第４実施例に係るステント６０は、第７図（Ａ）
の縮径状態と第７図（Ｂ）の拡径状態とに変化する網目
（メツシュ）状にて構成されている。なお、網目末端部
は形状記憶合金細線がほつれないように溶接、あるいは
接着剤にて固定されていることが望ましく、さらに望ま
しくは網目を構成している形状記憶合金細線の交差部分
も溶接、あるいは接着剤にて固定されていることが望ま
しい、Ｂｏａは高造影部である。Furthermore, the stent 60 according to the fourth embodiment is shown in FIG. 7(A).
It is constructed in a mesh shape that changes between a reduced diameter state as shown in FIG. 7(B) and an enlarged diameter state as shown in FIG. 7(B). In addition, it is desirable that the end portions of the mesh are fixed by welding or adhesive to prevent the thin shape memory alloy wires from fraying, and more preferably, the intersections of the thin shape memory alloy wires making up the mesh are also welded or fixed. Boa is a highly contrasting area that is preferably fixed with adhesive.
以下、本発明の具体的実施結果について説明する。Hereinafter, specific implementation results of the present invention will be explained.
第１図（Ａ）、（Ｂ）に示したと同一形状のステントで
あって、肉厚０．０４＋＊ｍ、幅１＋ｗ■のＴ＋−旧糸
合金（旧を約５１原子％含む）からなるステントを、電
解脱脂の後水洗し、酸処理を行なった後水洗し、ＫＡｕ
（ＯＮ） ２溶液中でＡｕメー２キを施した。こ ”の
メッキ済ステントと他の未メッキステントとを同一条件
にてＸ線造影したところ、メッキ済ステントについて造
影性の向上が認められた。A stent with the same shape as shown in FIGS. 1(A) and (B), made of T+-old thread alloy (containing about 51 atomic percent old) with a wall thickness of 0.04+*m and a width of 1+w■ After electrolytic degreasing, washing with water, acid treatment and washing with water,
(ON) Au 2nd coat was applied in 2 solutions. When this plated stent and other unplated stents were subjected to X-ray imaging under the same conditions, it was found that the contrast performance of the plated stent was improved.
金メッキによる造影性向上の確認として、金メッキステ
ントと、未メッキステントを４５ＫＶ、２．０ｍＡｇの
条件にてＸ線撮影し、造影写真を得た。To confirm the improvement in contrast performance due to gold plating, the gold-plated stent and the unplated stent were X-rayed at 45 KV and 2.0 mAg to obtain contrast photographs.
これを島津製作所製、島津２波長クロマトスキャナＣ９
９３０により６００ＩＩｌ１１の吸光度を求めた。この
スペクトルより、Ｘ線完全透過部の造影度を０、未メッ
キ部を１とすると、金メッキステント部は３となり、金
メッキによる著しい造影性の向上が確認された。This is a Shimadzu two-wavelength chromatography scanner C9 manufactured by Shimadzu Corporation.
The absorbance of 600IIl11 was determined using 930. From this spectrum, if the contrast intensity of the fully X-ray transparent area is 0 and the unplated area is 1, then the gold-plated stent area has a contrast intensity of 3, confirming that the gold plating significantly improves the contrast ability.
［発明の効果］以上のように、本発明は、形状記憶合金性筒状体からな
る管状器官内腔の内棒確保用器具において、筒状体の少
なくとも一部に、該形状記憶合金より高密度の金属をメ
ッキもしくは蒸着する等の、ｘ！Ｉによる造影性を高め
る処・置を施すようにしたものである。したがって、Ｘ
線に対する造影性の高い形状記憶合金性内径確保用器具
を提供し、該内径確保用器具を管状器官内の目的部位に
確実に導入、留置させることができる。[Effects of the Invention] As described above, the present invention provides an instrument for securing the inner rod of the inner cavity of a tubular organ made of a shape memory alloy cylindrical body, in which at least a part of the cylindrical body is made of a material having a higher temperature than the shape memory alloy. x! This method is designed to perform treatments to enhance the contrast property of I. Therefore, X
It is possible to provide a shape memory alloy inner diameter securing device with high contrast performance for lines, and to reliably introduce and indwell the inner diameter securing device at a target site within a tubular organ.
第１図（Ａ）、（Ｂ）は本発明の第１実施例に係る内径
確保用器具を示す側面図、第２図は留置用カテーテルを
示す断面図、第３図は回収用カテーテルを示す断面図、
第４図（Ａ）は内径確保用器具の導入状態を示す模式図
、第４図（Ｂ）は内径確保用器具の留置状態を示す模式
図、第４図（Ｃ）は内径確保用器具の回収状態を示す模
式図、第５図（Ａ）、（Ｂ）は本発明の第２実施例に係
る内径確保用器具を示す斜視図、第６図（Ａ）、（Ｂ）
は本発明の第３実施例に係る内径確保用器具を示す斜視
図、第７図（Ａ）、（Ｂ）は本発明の第４実施例に係る
内径確保用器具を示す斜視図である。１Ｏ１４０，５０，６０・・・ステント、１０ａ、４０
ａ、５０ａ、６０ ａ ・−・高造影部。1A and 1B are side views showing an inner diameter securing device according to a first embodiment of the present invention, FIG. 2 is a sectional view showing an indwelling catheter, and FIG. 3 is a retrieval catheter. cross section,
Figure 4 (A) is a schematic diagram showing the introduced state of the instrument for securing the inner diameter, Figure 4 (B) is a schematic diagram showing the state of indwelling the instrument for securing the inner diameter, and Figure 4 (C) is a schematic diagram showing the state of the instrument for securing the inner diameter. A schematic diagram showing a recovery state, FIGS. 5(A) and (B) are perspective views showing an inner diameter securing instrument according to a second embodiment of the present invention, and FIGS. 6(A) and (B)
7A and 7B are perspective views showing an inner diameter securing device according to a fourth embodiment of the present invention. FIG. 1O140,50,60...Stent, 10a, 40
a, 50a, 60a ---high contrast area.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62252457AJPH0673526B2 (en) | 1987-10-08 | 1987-10-08 | Instrument for securing inner diameter of tubular organ lumen |
| PCT/JP1988/001029WO1989003197A1 (en) | 1987-10-08 | 1988-10-07 | Instrument and apparatus for securing inner diameter of lumen of tubular organ |
| AU25309/88AAU623100B2 (en) | 1987-10-08 | 1988-10-07 | Instrument and apparatus for securing inner diameter of lumen of tubular organ |
| US07/477,843US5201901A (en) | 1987-10-08 | 1988-10-07 | Expansion unit and apparatus for expanding tubular organ lumen |
| EP88908753AEP0380668B1 (en) | 1987-10-08 | 1988-10-07 | Instrument and apparatus for securing inner diameter of lumen of tubular organ |
| DE3855725TDE3855725T2 (en) | 1987-10-08 | 1988-10-07 | INSTRUMENT AND DEVICE FOR MAINTAINING THE INNER LUMEN DIAMETER OF A TUBULAR ORGAN |
| AU10837/92AAU638886B2 (en) | 1987-10-08 | 1992-02-07 | Expansion unit and apparatus for expanding tubular organ lumen |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62252457AJPH0673526B2 (en) | 1987-10-08 | 1987-10-08 | Instrument for securing inner diameter of tubular organ lumen |
| Publication Number | Publication Date |
|---|---|
| JPH0194837Atrue JPH0194837A (en) | 1989-04-13 |
| JPH0673526B2 JPH0673526B2 (en) | 1994-09-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62252457AExpired - Fee RelatedJPH0673526B2 (en) | 1987-10-08 | 1987-10-08 | Instrument for securing inner diameter of tubular organ lumen |
| Country | Link |
|---|---|
| JP (1) | JPH0673526B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309935A (en)* | 1989-05-26 | 1990-12-25 | Yoji Ito | Medical needle, cylinder and instrument |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6028406U (en)* | 1983-08-03 | 1985-02-26 | 株式会社東芝 | switchboard |
| JPS6055964A (en)* | 1983-09-05 | 1985-04-01 | テルモ株式会社 | Catheter |
| JPS616655A (en)* | 1984-06-20 | 1986-01-13 | Olympus Optical Co Ltd | Manufacture of electrophotographic sensitive body |
| JPS6187540A (en)* | 1984-10-01 | 1986-05-02 | クツク・インコーポレーテツド | Blood vessel stent for performing through skin and insertionthereof |
| JPS6282975A (en)* | 1985-10-05 | 1987-04-16 | 井上 寛治 | Tubular organ dilator |
| JPS6282976A (en)* | 1985-10-05 | 1987-04-16 | 井上 寛治 | Tubular organ dilator |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6028406U (en)* | 1983-08-03 | 1985-02-26 | 株式会社東芝 | switchboard |
| JPS6055964A (en)* | 1983-09-05 | 1985-04-01 | テルモ株式会社 | Catheter |
| JPS616655A (en)* | 1984-06-20 | 1986-01-13 | Olympus Optical Co Ltd | Manufacture of electrophotographic sensitive body |
| JPS6187540A (en)* | 1984-10-01 | 1986-05-02 | クツク・インコーポレーテツド | Blood vessel stent for performing through skin and insertionthereof |
| JPS6282975A (en)* | 1985-10-05 | 1987-04-16 | 井上 寛治 | Tubular organ dilator |
| JPS6282976A (en)* | 1985-10-05 | 1987-04-16 | 井上 寛治 | Tubular organ dilator |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309935A (en)* | 1989-05-26 | 1990-12-25 | Yoji Ito | Medical needle, cylinder and instrument |
| Publication number | Publication date |
|---|---|
| JPH0673526B2 (en) | 1994-09-21 |
| Publication | Publication Date | Title |
|---|---|---|
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| AU623100B2 (en) | Instrument and apparatus for securing inner diameter of lumen of tubular organ | |
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| KR20030004283A (en) | Balloon expandable covered stents |
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |