JPH0829164B2 - Biological duct dilator - Google Patents
Biological duct dilatorInfo
- Publication number
- JPH0829164B2 JPH0829164B2 JP61307650A JP30765086A JPH0829164B2 JP H0829164 B2 JPH0829164 B2 JP H0829164B2 JP 61307650 A JP61307650 A JP 61307650A JP 30765086 A JP30765086 A JP 30765086A JP H0829164 B2 JPH0829164 B2 JP H0829164B2
- Authority
- JP
- Japan
- Prior art keywords
- prosthesis
- catheter
- outer diameter
- dilator
- shape memory
- 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
Landscapes
- Prostheses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は胆管、血管、食道等の生体管路が狭搾した場
合にその狭搾部を拡張するための生体管路拡張具に関す
る。TECHNICAL FIELD The present invention relates to a biological conduit dilator for expanding a narrowed part of a biological duct such as a bile duct, blood vessel, or esophagus.
［従来の技術］ 従来、形状記憶合金からなるプロステーセスを胆管の
狭搾部に導入し、加温生理食塩水等によりプロステーセ
スの外径を拡大させて胆汁の流通を確保するようにした
ものが特開昭60-220030号公報において提案されてい
る。このような生体管路拡張具による管路拡張の成功の
ポイントは、プロステーセスを適確に狭搾部に導き、か
つプロステーセスを体温以上に加温してその外径を確実
に拡大させることが重要である。[Prior Art] Conventionally, a prosthesis made of a shape memory alloy has been introduced into the narrowed portion of the bile duct, and the outer diameter of the prosthesis has been enlarged by warm physiological saline or the like to ensure bile circulation. It is proposed in Japanese Laid-Open Publication No. 60-220030. It is important to guide the prosthesis to the squeezed part properly and to warm the prosthesis to the body temperature or higher to surely expand its outer diameter. Is.
［発明が解決しようとする問題点］ しかしながら、上記の従来例ではプロステーセスを狭
搾部に留置するまでのカテーテルとの組合わせが具体的
に開示されておらず、狭搾部の拡張を確実に実施できな
い可能性があり、また挿入時に生体組織を傷付けるおそ
れがあった。[Problems to be Solved by the Invention] However, the above-mentioned conventional example does not specifically disclose the combination with the catheter until the prosthesis is placed in the narrowed portion, and ensures expansion of the narrowed portion. There was a possibility that it could not be carried out, and there was a risk that the living tissue would be damaged during insertion.
本発明はこのような問題点に着目してなされたもの
で、その目的とするところは、形状記憶合金からなるプ
ロステーセスを生体の狭搾部に安全かつ確実に留置する
ことができる生体管路拡張具を提供することにある。The present invention has been made in view of such a problem, and an object thereof is to expand a living body conduit that can safely and surely place a prosthesis made of a shape memory alloy in a narrowed portion of a living body. To provide the ingredients.
［問題点を解決するための手段及び作用］ 上記問題点を解決するために本発明は、形状記憶合金
を含むプロステーセスとこのプロステーセスを生体内へ
導入するカテーテルとを有する生体管路拡張具におい
て、前記プロステーセスの内径部を外嵌する前記カテー
テルの外径より小径の保持部を前記カテーテルの外周に
設け、前記プロステーセスの外径を前記カテーテルの外
径とほぼ等しく形成するとともに、前記プロステーセス
を加温するための生理食塩水注入管路を前記カテーテル
に設けたものである。[Means and Actions for Solving Problems] In order to solve the above problems, the present invention provides a biological conduit dilator having a prosthesis containing a shape memory alloy and a catheter for introducing the prosthesis into a living body. A holding portion having a diameter smaller than the outer diameter of the catheter that fits the inner diameter portion of the prosthesis is provided on the outer circumference of the catheter, and the outer diameter of the prosthesis is formed to be substantially equal to the outer diameter of the catheter, and the prosthesis is heated. The catheter is provided with a physiological saline injecting line.
［実施例］ 第１図および第２図を参照して、本発明の一実施例を
説明する。第１図は生体管路拡張具１を胆管２の狭搾部
に挿入した状態を示し、第２図は胆管２の狭搾部を拡張
させた状態を示す。[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a state in which the biological duct dilator 1 is inserted into the narrowed portion of the bile duct 2, and FIG. 2 shows a state in which the narrowed portion of the bile duct 2 is expanded.
この生体管路拡張具１はプロステーセス３と、このプ
ロステーセス３を生体内へ導入するためのカテーテル４
とからなる。This living body duct dilator 1 includes a prosthesis 3 and a catheter 4 for introducing the prosthesis 3 into a living body.
Consists of
ロステーセス３はシリコンゴム等からなる筒状の弾性
体15中に形状記憶合金コイル16を埋設して形成されてい
る。このプロステーセス３は第１図で示すようにカテー
テル４の先端部に設けられた保持部用小径部17に外嵌
し、カテーテル４に形成した生理食塩水注入管路８より
注入される生理食塩水で加温されるようになっている。The loss stage 3 is formed by embedding a shape memory alloy coil 16 in a cylindrical elastic body 15 made of silicon rubber or the like. As shown in FIG. 1, the prosthesis 3 is fitted onto a small-diameter portion 17 for a holding portion provided on the distal end portion of the catheter 4, and a physiological saline solution is injected from a physiological saline injection conduit 8 formed on the catheter 4. It is supposed to be heated in.
そして、プロステーセス３は生理食塩水で加温される
ことにより、第２図で示すように、その外径がカテーテ
ル４の外径よりも大きくなることによりカテーテル４よ
り離脱し得る構造となっている。When the prosthesis 3 is heated with physiological saline, its outer diameter becomes larger than the outer diameter of the catheter 4, as shown in FIG. .
なお、プロステーセス３の形状記憶合金コイル16の変
態温度は体温以上に設定されており、具体的には低温側
のマルテンサイト相から高温側のオーステナイト相への
変態開始温度を38℃付近に設定し、変態終了温度を45℃
付近に設定してある。The transformation temperature of the shape memory alloy coil 16 of the prosthesis 3 is set higher than the body temperature. Specifically, the transformation start temperature from the low temperature side martensite phase to the high temperature side austenite phase is set to around 38 ° C. , Transformation end temperature 45 ℃
It is set in the vicinity.
次に、このように構成された本拡張具１の使用方法に
ついて説明する。まず、図示しない内視鏡の挿入部を体
腔内に挿入し、その先端部を十二指腸乳頭付近に位置さ
せる。そして、内視鏡の鉗子チャンネル内に生体管路拡
張具１を挿通し、内視鏡の先端構成部より突出させて生
体管路拡張具１の先端部分を乳頭開口部へ押し込み挿入
する。Next, a method for using the thus-configured extension tool 1 will be described. First, an insertion portion of an endoscope (not shown) is inserted into a body cavity, and its tip is positioned near the duodenal papilla. Then, the living body conduit dilator 1 is inserted into the forceps channel of the endoscope, protruded from the distal end forming portion of the endoscope, and the distal end portion of the biological conduit dilator 1 is pushed into the papilla opening to be inserted.
このとき、通常、胆管２を押し広げながら挿入される
が、第１図で示す如く、前記プロステーセスの外径を前
記カテーテルの外径とほぼ等しく形成してあり、その間
に大きな段差がないので、胆管２の内壁を傷付ける心配
がない。At this time, the bile duct 2 is usually inserted while being expanded, but as shown in FIG. 1, the outer diameter of the prosthesis is formed to be substantially equal to the outer diameter of the catheter, and there is no large step between them. There is no need to worry about damaging the inner wall of the bile duct 2.
次に、この状態で生理食塩水注入管路８より38℃〜45
℃程度の生理食塩水をプロステーセス３に向けて注入す
る。これによりプロステーセス３は胆管２内に注入され
た生理食塩水によって体温以上に加温され、その外径が
第２図の如くに拡大する。Next, in this state, from the physiological saline injection line 8 to 38 ° C to 45 ° C.
A physiological saline solution of about ℃ is injected toward the prosthesis 3. As a result, the prosthesis 3 is heated above the body temperature by the physiological saline injected into the bile duct 2, and its outer diameter is expanded as shown in FIG.
その後、カテーテル４のみを胆管２内から引抜くこと
ができ、プロステーセス３を胆管２の狭搾部に安全かつ
確実に留置することができる。After that, only the catheter 4 can be pulled out from the bile duct 2, and the prosthesis 3 can be safely and surely placed in the narrowed portion of the bile duct 2.
なお、上記実施例では一方向性の形状記憶合金からな
るプロステーセス３を示したが、二方向性の形状記憶合
金を用いてもよい。In the above embodiment, the prosthesis 3 made of a unidirectional shape memory alloy is shown, but a bidirectional shape memory alloy may be used.
［発明の効果］ 以上説明したように本発明は、形状記憶合金を含むプ
ロステーセスの内径部を外嵌するカテーテルの外径より
小径の保持部を前記カテーテルの外周に設け、前記プロ
ステーセスの外径を前記カテーテルの外径とほぼ等しく
形成するとともに、前記プロステーセスを加温するため
の生理食塩水注入管路を前記カテーテルに設けたので、
プロステーセスをより安全かつ確実に狭搾部へ留置する
ことができ、胆汁等の流通を確保することができる。EFFECTS OF THE INVENTION As described above, according to the present invention, a holding portion having a smaller diameter than the outer diameter of a catheter to which the inner diameter portion of a prosthesis containing a shape memory alloy is fitted is provided on the outer circumference of the catheter, and the outer diameter of the prosthesis is adjusted. Since the catheter is provided with a saline injection line for heating the prosthesis, the catheter is formed to have an outer diameter substantially equal to that of the catheter.
The prosthesis can be placed in the squeezing part more safely and reliably, and the circulation of bile etc. can be secured.
図面は本発明の一実施例を示し、第１図は生体管路拡張
具を胆管内に挿入した状態を示す断面図、第２図は狭搾
部を拡張した状態を示す断面図である。 １……生体管路拡張具、３……プロステーセス、４……
カテーテル、15……弾性体、16……形状記憶合金コイ
ル。The drawings show one embodiment of the present invention, in which FIG. 1 is a sectional view showing a state in which a biological duct dilator is inserted into a bile duct, and FIG. 2 is a sectional view showing a state in which a narrowed portion is expanded. 1 …… Body duct expander, 3… Prostheses, 4 ……
Catheter, 15 ... elastic body, 16 ... shape memory alloy coil.
Claims (1)
プロステーセスを生体内へ導入するカテーテルとを有す
る生体管路拡張具において、前記プロステーセスの内径
部を外嵌する、前記カテーテルの外径より小径の保持部
を前記カテーテルの外周に設け、前記プロステーセスの
外径を前記カテーテルの外径とほぼ等しく形成するとと
もに、前記プロステーセスを加温するための生理食塩水
注入管路を前記カテーテルに設けたことを特徴とする生
体管路拡張具。1. A living body conduit dilator having a prosthesis containing a shape memory alloy and a catheter for introducing the prosthesis into a living body, wherein an inner diameter portion of the prosthesis is externally fitted to hold a diameter smaller than an outer diameter of the catheter. A portion is provided on the outer circumference of the catheter, the outer diameter of the prosthesis is formed to be substantially equal to the outer diameter of the catheter, and a physiological saline injection conduit for heating the prosthesis is provided on the catheter. A biological conduit dilator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307650A JPH0829164B2 (en) | 1986-12-25 | 1986-12-25 | Biological duct dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307650A JPH0829164B2 (en) | 1986-12-25 | 1986-12-25 | Biological duct dilator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20992592A Division JP2502437B2 (en) | 1992-08-06 | 1992-08-06 | Biological duct dilator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63160644A JPS63160644A (en) | 1988-07-04 |
| JPH0829164B2 true JPH0829164B2 (en) | 1996-03-27 |
Family
ID=17971594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61307650A Expired - Lifetime JPH0829164B2 (en) | 1986-12-25 | 1986-12-25 | Biological duct dilator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0829164B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63264077A (en) * | 1987-04-22 | 1988-10-31 | 日本ゼオン株式会社 | Catheter for dilating constricted part |
| JPH0415230Y2 (en) * | 1988-12-26 | 1992-04-06 | ||
| JPH0415232Y2 (en) * | 1989-06-12 | 1992-04-06 | ||
| JPH0364656U (en) * | 1989-10-27 | 1991-06-24 | ||
| JPH067843B2 (en) * | 1990-02-15 | 1994-02-02 | 寛治 井上 | Artificial blood vessel with frame |
| JP2539955B2 (en) * | 1991-02-25 | 1996-10-02 | テルモ株式会社 | A catheter equipped with a device for securing the inner diameter of the lumen of a tubular organ |
| US5242452A (en) * | 1991-10-11 | 1993-09-07 | Kanji Inoue | Device for collapsing an appliance collapsible for insertion into human organs |
| US5290305A (en) * | 1991-10-11 | 1994-03-01 | Kanji Inoue | Appliance collapsible for insertion into human organs and capable of resilient restoration |
| US8425412B2 (en) * | 2006-07-14 | 2013-04-23 | Cook Medical Technologies Llc | Papilla spreader |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4503569A (en) | 1983-03-03 | 1985-03-12 | Dotter Charles T | Transluminally placed expandable graft prosthesis |
| US4512338A (en) | 1983-01-25 | 1985-04-23 | Balko Alexander B | Process for restoring patency to body vessels |
-
1986
- 1986-12-25 JP JP61307650A patent/JPH0829164B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4512338A (en) | 1983-01-25 | 1985-04-23 | Balko Alexander B | Process for restoring patency to body vessels |
| US4503569A (en) | 1983-03-03 | 1985-03-12 | Dotter Charles T | Transluminally placed expandable graft prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63160644A (en) | 1988-07-04 |
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