JPH08734A - Insertion tool for tubular organ - Google Patents
Insertion tool for tubular organInfo
- Publication number
- JPH08734A JPH08734A JP6157998A JP15799894A JPH08734A JP H08734 A JPH08734 A JP H08734A JP 6157998 A JP6157998 A JP 6157998A JP 15799894 A JP15799894 A JP 15799894A JP H08734 A JPH08734 A JP H08734A
- Authority
- JP
- Japan
- Prior art keywords
- core wire
- tip
- metal coil
- shape memory
- memory alloy
- 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.)
- Granted
Links
- 238000003780 insertion Methods 0.000 title claims abstract description 54
- 230000037431 insertion Effects 0.000 title claims abstract description 54
- 210000000056 organ Anatomy 0.000 title claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 53
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 50
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- 238000005219 brazing Methods 0.000 claims abstract description 22
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000005491 wire drawing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 239000012781 shape memory material Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 210000000013 bile duct Anatomy 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 229920001477 hydrophilic polymer Polymers 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 210000000626 ureter Anatomy 0.000 description 2
- 229910004337 Ti-Ni Inorganic materials 0.000 description 1
- 229910011209 Ti—Ni Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば血管、尿管、胆
管、気管などにカテーテルを挿入する際に用いられる管
状器官への挿入具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion tool for a tubular organ used for inserting a catheter into a blood vessel, a ureter, a bile duct, a trachea or the like.
【０００２】[0002]
【従来の技術】近年、血管、尿管、胆管、器官などの人
体の管状器官における検査・治療のため、カテーテルを
挿入して造影剤などの薬剤を投入したり、カテーテルを
通して鉗子等によって組織の一部を採取したりすること
が行われている。カテーテルの挿入に際しては、管状器
官内に、まず、比較的細くて柔軟な挿入具（いわゆるガ
イドワイヤ）を挿入し、この挿入具の外周に沿ってカテ
ーテルを挿入した後、挿入具を抜き出すようにしてい
る。2. Description of the Related Art In recent years, in order to inspect and treat tubular organs of the human body such as blood vessels, ureters, bile ducts, and organs, a catheter is inserted to inject a drug such as a contrast agent, or a tissue is passed through the catheter to remove tissue. Some of them are collected. When inserting a catheter, first insert a relatively thin and flexible insertion tool (so-called guide wire) into the tubular organ, insert the catheter along the outer circumference of this insertion tool, and then remove the insertion tool. ing.
【０００３】上記挿入具としては、ステンレスからなる
芯線の先端部を次第に細くなるように形成し、この芯線
の先端部外周に金属コイルを装着したものが知られてい
る。この挿入具によれば、芯線の先端部を細くして、柔
軟なコイルを装着したので、挿入時における組織の損傷
を少なくできるという利点が得られる。As the above-mentioned insertion tool, there is known one in which a distal end portion of a core wire made of stainless steel is formed to be gradually thin and a metal coil is attached to the outer periphery of the distal end portion of the core wire. According to this insertion tool, the distal end portion of the core wire is thinned and the flexible coil is attached, so that there is an advantage that damage to the tissue at the time of insertion can be reduced.
【０００４】しかしながら、ステンレスからなる芯線
は、屈曲（キンク）しやすく、また、屈曲すると元の形
状に戻りにくい（耐キンク性に劣る）という問題を有す
るため、芯線の材質を形状記憶合金にして、上記と同様
の構造にした挿入具が試みられている。しかし、形状記
憶合金は、耐キンク性には優れるものの、ろう付けしに
くく、また、ヤング率が低く、挿入具の手元部の剛性に
劣り、剛性を上げるためには線径を太くしなければなら
ないため、細い管状器官への挿入具としては用いること
ができないという問題があった。However, since the core wire made of stainless steel has a problem that it is easily bent (kinked) and is difficult to return to its original shape when bent (it is inferior in kink resistance), the material of the core wire is a shape memory alloy. , An insertion tool having a structure similar to the above has been attempted. However, although shape memory alloys have excellent kink resistance, they are difficult to braze, have a low Young's modulus, and have poor rigidity at the proximal portion of the insertion tool. To increase the rigidity, the wire diameter must be increased. Therefore, there is a problem that it cannot be used as an insertion tool for a thin tubular organ.
【０００５】これらの問題を解決する管状器官への挿入
具として、特開平6-86824 号公報には、図９に示すよう
な挿入具が開示されている。この挿入具８１は例えばス
テンレス等の容易に溶接可能な材料８２を、形状記憶材
料８３で包囲し、形状記憶材料８３の先端部に傾斜部８
３ａを設けて、容易に溶接可能な材料８２を形状記憶材
料８３の先端から突出させ、その先端部に丸い滑らかな
先端部８４を溶接し、傾斜部８３ａの外周を可撓性コイ
ル８５で包囲し、これら全体の外周にポリマー層８６を
設け、さらにその外周に親水性膜８７を設けたものであ
る。As an insertion tool for a tubular organ which solves these problems, Japanese Patent Application Laid-Open No. 6-86824 discloses an insertion tool as shown in FIG. The insert 81 encloses an easily weldable material 82 such as stainless steel with a shape memory material 83, and the inclined portion 8 is provided at the tip of the shape memory material 83.
3a is provided, the easily weldable material 82 is projected from the tip of the shape memory material 83, the round smooth tip 84 is welded to the tip, and the outer periphery of the inclined portion 83a is surrounded by the flexible coil 85. However, the polymer layer 86 is provided on the outer periphery of the whole of these, and the hydrophilic film 87 is further provided on the outer periphery thereof.
【０００６】この挿入具８１は、容易に溶接可能な材料
８２が先端部に突出しているので、その先端部に丸い滑
らかな先端部８４を溶接しやすく、また、その外周を形
状記憶材料８３で包囲しているので、耐キンク性に優
れ、屈曲しにくいという利点を有する。The insert 81 has an easily weldable material 82 protruding from its tip, so that a round and smooth tip 84 can be easily welded to the tip, and the outer periphery of the insert 81 is made of a shape memory material 83. Since it is surrounded, it has the advantages of excellent kink resistance and being difficult to bend.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記挿
入具８１は、形状記憶材料８３の先端部に傾斜部８３ａ
を設け、その部分に可撓性コイル８５の基部を固着する
構造であるため、コイル８５をろう付け等によって固着
できないという問題があった。However, in the insertion tool 81, the inclined portion 83a is formed at the tip of the shape memory material 83.
Since the structure is provided and the base portion of the flexible coil 85 is fixed to that portion, there is a problem that the coil 85 cannot be fixed by brazing or the like.
【０００８】また、形状記憶材料８３の中心に挿入され
た容易に溶接可能な材料８２は、全体が同じ太さの線材
で形成されていて、いわば安全ワイヤのような役割をな
すもので、形状記憶材料８３では不足する剛性を補うの
には不十分であった。Further, the easily weldable material 82 inserted in the center of the shape memory material 83 is formed of a wire material having the same thickness as a whole, and plays a role like a safety wire, so to speak. The memory material 83 was insufficient to compensate for the insufficient rigidity.
【０００９】本発明は、これらの問題点を解決するため
になされたもので、その目的は、適度な剛性を有し、か
つ、耐キンク性に優れ、製造が容易で、コストも低減さ
れるようにした管状器官への挿入具を提供することにあ
る。The present invention has been made to solve these problems, and its purpose is to have appropriate rigidity, excellent kink resistance, easy manufacture, and reduced cost. An object of the present invention is to provide an insertion tool for such a tubular organ.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明の管状器官への挿入具の一つは、先端部が次
第に細くなるように形成されたステンレス製の芯線と、
この芯線の前記先端部外周に装着された金属コイルと、
前記芯線の前記先端部を除く部分の外周に装着された形
状記憶合金の筒状体とを備え、前記金属コイルの基端部
は前記芯線の先端部の傾斜した部分にろう付けされ、前
記金属コイルの先端部には溶融又はろう付けによって丸
い頭部が形成され、前記芯線の先端がこの丸い頭部に融
着又はろう付けされていることを特徴とする。In order to achieve the above object, one of the insertion tools for a tubular organ of the present invention is a stainless steel core wire whose distal end portion is formed to be gradually tapered,
A metal coil attached to the outer circumference of the tip of the core wire;
And a cylindrical body of a shape memory alloy attached to the outer periphery of a portion of the core wire excluding the tip portion, the base end portion of the metal coil being brazed to an inclined portion of the tip end portion of the core wire, A round head is formed at the tip of the coil by melting or brazing, and the tip of the core wire is fused or brazed to the round head.
【００１１】また、本発明の管状器官への挿入具のもう
一つは、先端部が次第に細くなるように形成されたステ
ンレス製の芯線と、この芯線の前記先端部外周に装着さ
れた金属コイルと、前記芯線の前記先端部を除く部分の
外周に装着された形状記憶合金の筒状体とを備え、前記
金属コイルの基端部は前記芯線の先端部の傾斜した部分
にろう付けされ、前記金属コイルの先端部には溶融又は
ろう付けによって丸い頭部が形成され、前記芯線の先端
部に連接された安全ワイヤの先端がこの丸い頭部に融着
又はろう付けされていることを特徴とする。Another embodiment of the insertion tool for a tubular organ according to the present invention is a stainless steel core wire having a tapered tip, and a metal coil attached to the outer circumference of the tip. And a cylindrical body of a shape memory alloy attached to the outer periphery of a portion of the core wire excluding the tip portion, the base end portion of the metal coil being brazed to an inclined portion of the tip end portion of the core wire, A round head is formed at the tip of the metal coil by melting or brazing, and the tip of the safety wire connected to the tip of the core wire is fused or brazed to the round head. And
【００１２】本発明の実施に際して、挿入具全体の外径
は0.3 〜0.7mm 、前記芯線の外径は0.1 〜0.4 mm、前記
筒状体の肉厚は0.02〜0.2 mmとされることが好ましい。In implementing the present invention, it is preferable that the outer diameter of the entire insertion tool is 0.3 to 0.7 mm, the outer diameter of the core wire is 0.1 to 0.4 mm, and the wall thickness of the tubular body is 0.02 to 0.2 mm. .
【００１３】また、本発明において、前記芯線と前記形
状記憶合金の筒状体とは、接着又はろう付けにより固着
されているか、あるいは、圧延、クラッド、伸線などに
よって一体化されていることが好ましいが、当業者によ
って知られている他の方法で一体化されたものでもよ
い。Further, in the present invention, the core wire and the cylindrical body of the shape memory alloy may be fixed to each other by adhesion or brazing, or may be integrated by rolling, clad, wire drawing or the like. Although preferred, it may be integrated in other ways known to those skilled in the art.
【００１４】また、本発明の別の態様として、前記芯線
及び前記金属コイルの外径を、前記形状記憶合金の筒状
体の内径よりも小さくし、前記芯線及び前記金属コイル
を、前記形状記憶合金の筒状体から抜き出し可能として
もよい。As another aspect of the present invention, the core wire and the metal coil have an outer diameter smaller than an inner diameter of a cylindrical body of the shape memory alloy, and the core wire and the metal coil have the shape memory. It may be possible to extract the alloy from the tubular body.
【００１５】[0015]
【作用】本発明の管状器官への挿入具は、ステンレス製
の芯線と、この芯線の先端部を除く部分の外周に装着さ
れた形状記憶合金の筒状体とを備えているので、ステン
レス製の芯線によって剛性が向上するとともに、形状記
憶合金の筒状体によって耐キンク性が向上する。したが
って、適度な剛性を有するとともに、耐キンク性に優れ
た挿入具を提供することができる。The insertion tool for a tubular organ of the present invention is provided with a stainless steel core wire and a shape memory alloy tubular body attached to the outer periphery of the portion of the core wire excluding the tip end portion thereof. The core wire improves the rigidity, and the tubular body of the shape memory alloy improves the kink resistance. Therefore, it is possible to provide an inserter having appropriate rigidity and excellent kink resistance.
【００１６】また、本発明の管状器官への挿入具は、ス
テンレス製の芯線の先端部が次第に細くなるように形成
され、金属コイルの基端部が、芯線の先端部の傾斜した
部分にろう付けされ、金属コイルの先端部は、芯線の先
端又は芯線の先端部に連接された安全ワイヤの先端と一
緒に、丸い頭部に融着又はろう付けされているので、金
属コイルが芯線の先端部にしっかりと固着される。その
結果、管状器官内で金属コイルが芯線の先端部から脱落
したり、引き伸ばされたりする危険が少なくなり、安全
性を高めることができる。Further, the insertion tool for a tubular organ according to the present invention is formed such that the tip end portion of the stainless steel core wire is gradually thinned, and the base end portion of the metal coil is the inclined portion of the tip end portion of the core wire. The tip of the metal coil is fused or brazed to the round head together with the tip of the core wire or the tip of the safety wire connected to the tip of the core wire. It is firmly fixed to the part. As a result, there is less risk that the metal coil will fall off or be stretched from the tip of the core wire in the tubular organ, and safety can be improved.
【００１７】更に、上記のように、金属コイルをステン
レス製の芯線に直接ろう付けすることができるので、製
造が容易となり、製造コストを低減することができる。Furthermore, as described above, since the metal coil can be directly brazed to the stainless steel core wire, the manufacturing is facilitated and the manufacturing cost can be reduced.
【００１８】また、本発明の好ましい態様において、挿
入具全体の外径を0.3 〜0.7mm 、芯線の外径を0.1 〜0.
4 mm、筒状体の肉厚を0.02〜0.2 mmとした場合には、ス
テンレス製の芯線の剛性と、形状記憶合金の筒状体の超
弾性とがちょうど良くバランスして、管状器官への挿入
具として好ましい適度な剛性と、優れた耐キンク性を得
ることができる。In a preferred embodiment of the present invention, the outer diameter of the entire insertion tool is 0.3 to 0.7 mm and the outer diameter of the core wire is 0.1 to 0.
When the thickness of the tubular body is 4 mm and the thickness of the tubular body is 0.02 to 0.2 mm, the rigidity of the stainless steel core wire and the superelasticity of the tubular body of the shape memory alloy are just well balanced to form a tubular organ. It is possible to obtain appropriate rigidity suitable as an insertion tool and excellent kink resistance.
【００１９】更に、本発明の好ましい態様において、芯
線及び金属コイルの外径を形状記憶合金の筒状体の内径
よりも小さくし、芯線及び金属コイルを形状記憶合金の
筒状体から抜き出し可能とした場合には、挿入具を管状
器官内に挿入した後、芯線及び金属コイルを形状記憶合
金の筒状体から引き抜いて、残された筒状体をカテーテ
ルとして利用することができる。Furthermore, in a preferred embodiment of the present invention, the outer diameter of the core wire and the metal coil is made smaller than the inner diameter of the cylindrical body of the shape memory alloy so that the core wire and the metal coil can be extracted from the cylindrical body of the shape memory alloy. In this case, after inserting the insertion tool into the tubular organ, the core wire and the metal coil can be pulled out from the tubular body of the shape memory alloy, and the remaining tubular body can be used as a catheter.
【００２０】[0020]
【実施例】図１には、本発明の管状器官への挿入具の一
実施例による部分断面図が示されている。1 is a partial cross-sectional view showing an embodiment of an insertion tool for a tubular organ according to the present invention.
【００２１】この管状器官への挿入具１１は、先端部１
２ａが次第に細くなるようにテーパ状に形成されたステ
ンレス製の芯線１２と、この芯線１２の先端部１２ａ外
周に装着された金属コイル１４と、芯線１２の先端部１
２ａを除く部分１２ｂの外周に装着された形状記憶合金
の筒状体１３とを備えている。The insertion tool 11 for this tubular organ has a tip 1
A stainless steel core wire 12 formed in a tapered shape so that 2a gradually becomes thinner, a metal coil 14 mounted on the outer periphery of a tip end portion 12a of the core wire 12, and a tip end portion 1 of the core wire 12
A cylindrical body 13 of a shape memory alloy mounted on the outer periphery of a portion 12b except 2a.
【００２２】金属コイル１４の基端部は、芯線１２の先
端部１２ａの傾斜した部分、すなわちテーパ部にろう付
けされている。また、金属コイル１４の先端部には溶融
又はろう付けにより丸い頭部１５が形成され、芯線１２
の先端がこの頭部１５に直接融着又はろう付けされてい
る。The base end portion of the metal coil 14 is brazed to the inclined portion of the tip portion 12a of the core wire 12, that is, the taper portion. A round head 15 is formed on the tip of the metal coil 14 by melting or brazing.
The tip of the is directly fused or brazed to the head 15.
【００２３】上記において、筒状体１３の形状記憶合金
としては、例えばＴｉ−Ｎｉ合金が好ましく用いられ
る。その変態点は、好ましくは体温よりも低く設定さ
れ、管状器官内において超弾性が発揮されるようにする
ことが好ましい。In the above, as the shape memory alloy of the tubular body 13, for example, a Ti—Ni alloy is preferably used. The transformation point is preferably set lower than the body temperature so that superelasticity is exhibited in the tubular organ.
【００２４】また、金属コイル１４の材質としては、ス
テンレスを用いることもできるが、好ましくはＸ線不透
過性の材質、例えば金、白金、タングステン、タンタ
ル、イリジウム、レニウム、及びこれらの合金等が用い
られる。Ｘ線不透過性の材質を用いた場合には、挿入具
１１を管状器官に挿入する際に、その先端位置をＸ線モ
ニターテレビで確認しながら行うことができる。The metal coil 14 may be made of stainless steel, but is preferably an X-ray opaque material such as gold, platinum, tungsten, tantalum, iridium, rhenium, and alloys thereof. Used. When an X-ray opaque material is used, the insertion tool 11 can be inserted into the tubular organ while checking the tip position of the insertion tool 11 on the X-ray monitor TV.
【００２５】頭部１５は、例えば芯線１２や金属コイル
１４の先端を溶融させることによって形成することもで
き、あるいはろう材を付着させて形成することもでき
る。頭部１５を溶融又はろう付けによって形成すると
き、芯線１２及び金属コイル１４の先端を一緒に溶融又
はろう付けして固着することができる。The head portion 15 can be formed, for example, by melting the tips of the core wire 12 and the metal coil 14, or can be formed by adhering a brazing material. When the head portion 15 is formed by melting or brazing, the tips of the core wire 12 and the metal coil 14 can be fixed by melting or brazing together.
【００２６】本発明の管状器官への挿入具１１は、その
全長が1500〜1800mm、金属コイルの基部から頭部までの
長さが50〜400 mmとするのが好ましい。また、挿入具１
１全体としての外径は0.3 〜0.7 mm、芯線１２の外径は
0.1 〜0.4 mm、筒状体１３の肉厚は0.02〜0.2 mmとする
のが好ましい。The insert 11 for a tubular organ of the present invention preferably has a total length of 1500 to 1800 mm and a length from the base to the head of the metal coil of 50 to 400 mm. Also, the insertion tool 1
1. The overall outer diameter is 0.3 to 0.7 mm, and the outer diameter of the core wire 12 is
It is preferable that the thickness of the cylindrical body 13 is 0.1 to 0.4 mm and the thickness of the cylindrical body 13 is 0.02 to 0.2 mm.
【００２７】また、本発明の管状器官への挿入具１１
は、滑り性を向上させるため、その外周にフッ素樹脂な
どの合成樹脂膜（あるいは合成樹脂チューブ）を被覆し
てもよく、更にはその合成樹脂膜の表面に親水性ポリマ
ーを被覆してもよい。このような親水性ポリマーとして
は、例えば特公平4-14991 号に開示されたような樹脂が
挙げられる。Further, the insertion tool 11 for the tubular organ of the present invention
May be coated with a synthetic resin film (or a synthetic resin tube) such as a fluororesin on the outer periphery thereof in order to improve the slipperiness, and further, the surface of the synthetic resin film may be coated with a hydrophilic polymer. . Examples of such hydrophilic polymers include resins disclosed in Japanese Patent Publication No. 4-14991.
【００２８】更に、上記において、芯線１２と形状記憶
合金の筒状体１３とを一体化させるとともに、芯線１２
の先端部を次第に細くなるように形成する方法として
は、例えば次のような方法が採用される。Further, in the above, the core wire 12 and the cylindrical body 13 of the shape memory alloy are integrated, and the core wire 12 is
For example, the following method is adopted as a method of forming the tip of the taper so that it becomes thinner.
【００２９】図４に示す方法は、芯線と形状記憶合金の
筒状体とを、圧延、クラッド又は伸線により一体化し、
この先端部を次第に細くなるように切削する方法であ
る。すなわち、芯線１２の外径よりやや大きい内径を有
する形状記憶合金の筒状体１３に、芯線１２を挿通した
後、圧延、クラッド又は伸線により、芯線１２と形状記
憶合金の筒状体１３とを一体化させ、挿入具として必要
な長さに切断した後、一体化した芯線１２及び筒状体１
３の先端部を切削して次第に細く形成する。その結果、
先端部は、芯線１２のみが露出した状態となる。In the method shown in FIG. 4, the core wire and the tubular body of the shape memory alloy are integrated by rolling, clad or wire drawing,
This is a method of cutting the tip so that it becomes thinner. That is, after inserting the core wire 12 into the cylindrical body 13 of the shape memory alloy having an inner diameter slightly larger than the outer diameter of the core wire 12, the core wire 12 and the cylindrical body 13 of the shape memory alloy are rolled by rolling, clad or drawn. Are integrated and cut into a length required as an insertion tool, and then integrated core wire 12 and tubular body 1
The tip of 3 is cut to form gradually thinner. as a result,
At the tip portion, only the core wire 12 is exposed.
【００３０】図５に示す方法は、芯線と形状記憶合金の
筒状体とをろう付けにより固着させる方法である。すな
わち、芯線１２の外径よりやや大きい内径を有する形状
記憶合金の筒状体１３に、芯線１２を挿通し、筒状体１
３の先端部から芯線１２が突出する部分に、金属ろう材
１７をろう付けし、芯線１２が形状記憶合金の筒状体１
３に対して軸方向に動かないように固着させる。この場
合、芯線１２の先端部１２ａは、ろう付け前に予め細く
形成されていてもよく、ろう付けにより筒状体１３に固
着してから細く形成してもよい。The method shown in FIG. 5 is a method of fixing the core wire and the tubular body of the shape memory alloy by brazing. That is, the core wire 12 is inserted into the cylindrical body 13 of shape memory alloy having an inner diameter slightly larger than the outer diameter of the core wire 12 to form the cylindrical body 1.
The metal brazing material 17 is brazed to the portion of the core wire 12 protruding from the tip of the core body 3, and the core wire 12 is a tubular body 1 of shape memory alloy.
It is fixed so that it does not move in the axial direction with respect to 3. In this case, the tip portion 12a of the core wire 12 may be thinly formed in advance before brazing, or may be thinned after being fixed to the tubular body 13 by brazing.
【００３１】なお、この他の方法として、芯線と形状記
憶合金の筒状体とを接着剤で接着して一体化させる方法
も採用できる。As another method, a method of adhering the core wire and the cylindrical body of the shape memory alloy with an adhesive to integrate them can also be adopted.
【００３２】図２には、本発明の管状器官への挿入具の
他の実施例による部分断面図が示されている。FIG. 2 shows a partial cross-sectional view of another embodiment of the tubular organ insertion device of the present invention.
【００３３】この管状器官への挿入具２１は、先端部２
２ａが次第に細くなるように形成されたステンレス製の
芯線２２と、この芯線２２の先端部２２ａ外周に装着さ
れた金属コイル２４と、芯線２２の先端部２２ａを除く
部分２２ｂの外周に装着された形状記憶合金の筒状体２
３とを備えている。金属コイル２４の基端部は、芯線２
２の先端部２２ａの傾斜した部分、すなわちテーパ部に
ろう付けされている。金属コイル２４の先端部に溶融又
はろう付けによって丸い頭部２５が形成され、芯線２２
の先端に連接された安全ワイヤ２６の先端が、この丸い
頭部２５に同じく溶融又はろう付けによって連結されて
いる。The insertion tool 21 for this tubular organ has a tip 2
The stainless steel core wire 22 formed so that 2a is gradually thinned, the metal coil 24 mounted on the outer circumference of the tip end portion 22a of the core wire 22, and the metal coil 24 mounted on the outer circumference of the portion 22b of the core wire 22 excluding the tip end portion 22a. Shape memory alloy cylinder 2
3 and 3. The base end of the metal coil 24 has a core wire 2
The tip end portion 22a of No. 2 is brazed to the inclined portion, that is, the taper portion. A round head 25 is formed on the tip of the metal coil 24 by melting or brazing,
The tip of a safety wire 26 connected to the tip of the round head is also connected to this round head 25 by melting or brazing.
【００３４】なお、金属コイル２４としては、前記実施
例と同様な材質のものが用いられ、安全ワイヤ２６も、
上記金属コイル２４と同様な材質のものが用いられる。The metal coil 24 is made of the same material as in the above embodiment, and the safety wire 26 is also
The same material as the metal coil 24 is used.
【００３５】図３には、本発明の管状器官への挿入具の
更に他の実施例による部分断面図が示されている。FIG. 3 is a partial sectional view showing a further embodiment of the insertion tool for the tubular organ of the present invention.
【００３６】この管状器官への挿入具３１は、先端部３
２ａが次第に細くなるようにテーパ状に形成されたステ
ンレス製の芯線３２と、この芯線３２の先端部３２ａ外
周に装着された金属コイル３４と、芯線３２の先端部３
２ａを除く部分３２ｂの外周に装着された形状記憶合金
の筒状体３３とを備えている。The insertion tool 31 for inserting into the tubular organ has a tip 3
2a is made of a tapered stainless steel core wire 32, a metal coil 34 is attached to the outer circumference of the tip end portion 32a of the core wire 32, and the tip end portion 3 of the core wire 32 is formed.
A cylindrical body 33 of a shape memory alloy mounted on the outer circumference of a portion 32b except 2a.
【００３７】金属コイル３４の基端部は、芯線３２の先
端部３２ａの傾斜した部分、すなわちテーパ部の中間に
ろう付けされている。また、金属コイル３４の先端部に
は溶融又はろう付けにより丸い頭部３５が形成され、芯
線３２の先端がこの頭部３５に直接融着又はろう付けさ
れている。The base end portion of the metal coil 34 is brazed to the inclined portion of the tip end portion 32a of the core wire 32, that is, the middle of the taper portion. A round head portion 35 is formed at the tip of the metal coil 34 by melting or brazing, and the tip of the core wire 32 is directly fused or brazed to the head portion 35.
【００３８】そして、この実施例では、芯線３２の外径
Ｄ1 及び金属コイル３４の外径Ｄ2が、形状記憶合金の
筒状体３３の内径Ｄ3 よりも小さくされ、芯線３２及び
金属コイル３４が、形状記憶合金の筒状体３３から抜き
出し可能とされている。なお、芯線３２の外径Ｄ1 及び
金属コイル３４の外径Ｄ2 は、形状記憶合金の筒状体３
３の内径Ｄ3 よりも小さくされているが、その差は非常
に小さいため、図３においては必ずしも明確ではない。[0038] Then, in this embodiment, the outer diameter D 2 of the outer diameter D 1 and the metal coil 34 of the core wire 32, is smaller than the inner diameter D 3 of the cylindrical body 33 of shape memory alloy, the core wire 32 and the metal coil 34 can be pulled out from the cylindrical body 33 of the shape memory alloy. The outer diameter D 2 of the outer diameter D 1 and the metal coil 34 of the core wire 32, the tubular body of shape memory alloy 3
Although it is smaller than the inner diameter D 3 of No. 3 , the difference is very small and is not necessarily clear in FIG.
【００３９】なお、図３に示す管状器官への挿入具３１
は、管状器官へ挿入具３１を挿入した後、芯線３２及び
金属コイル３４を、形状記憶合金の筒状体３３から抜き
出して、形状記憶合金の筒状体３３のみを管状器官に残
すことにより、形状記憶合金の筒状体３３をカテーテル
として使用することが可能であり、挿入具３１に沿って
カテーテルを挿入することが不必要となり、患者及び医
師の負担を軽減することができる。The insertion tool 31 for the tubular organ shown in FIG.
After inserting the insertion tool 31 into the tubular organ, the core wire 32 and the metal coil 34 are extracted from the tubular body 33 of the shape memory alloy, and only the tubular body 33 of the shape memory alloy is left in the tubular organ. The tubular body 33 of shape memory alloy can be used as a catheter, and it becomes unnecessary to insert the catheter along the insertion tool 31, and the burden on the patient and the doctor can be reduced.
【００４０】以上、本発明の管状器官への挿入具の実施
例を図１〜３に示したが、本発明の管状器官への挿入具
においては、芯線はステンレス製のものとするが、一本
のワイヤからなるものばかりでなく、複数の細線をより
合わせたより線で構成されていてもよい。また、上記図
１〜３に示す実施例においては、芯線の先端部を、テー
パ状に形成するか、または安全ワイヤを用いる方法によ
り次第に細くなるように形成したが、これらの方法に限
定されず、次第に細くなるような形状であれば、例えば
段状に縮径された形状等であってもよい。An embodiment of the insertion tool for a tubular organ of the present invention is shown in FIGS. 1 to 3 above. In the insertion tool for a tubular organ of the present invention, the core wire is made of stainless steel. It is not limited to one made of a wire, and may be made of a twisted wire in which a plurality of thin wires are twisted together. Further, in the embodiments shown in FIGS. 1 to 3 described above, the tip end portion of the core wire is formed in a tapered shape or is formed so as to become gradually thinner by a method using a safety wire, but it is not limited to these methods. The shape may be, for example, a stepwise reduced diameter as long as the shape becomes gradually smaller.
【００４１】試験例 本発明の管状器官への挿入具に用いたステンレス製の芯
線とその外周に装着された形状記憶合金の筒状体とから
なる線材の、耐キンク性と、剛性とを、ステンレス製の
線材、形状記憶合金製の線材と比較した。Test Example The kink resistance and the rigidity of a wire made of a stainless steel core wire used in the insertion tool for the tubular organ of the present invention and a cylindrical body of a shape memory alloy attached to the outer periphery of Comparison was made with stainless steel wire rods and shape memory alloy wire rods.
【００４２】ステンレス製の芯線とその外周に装着され
た形状記憶合金の筒状体とからなる線材は、外径0.35mm
の芯線を、外径0.5 mm、肉厚0.06mmの筒状体に挿入し、
長さ200 mm、外径0.5 mmの線材とした。ステンレス製の
線材及び形状記憶合金製の線材も、同様の長さ、外径の
ものを用いた。A wire consisting of a stainless steel core wire and a shape memory alloy tubular body mounted on the outer periphery of the wire has an outer diameter of 0.35 mm.
Insert the core wire of to a cylindrical body with an outer diameter of 0.5 mm and a wall thickness of 0.06 mm,
A wire rod with a length of 200 mm and an outer diameter of 0.5 mm was used. The wire rod made of stainless steel and the wire rod made of shape memory alloy also had the same length and outer diameter.
【００４３】これら３種の線材の耐キンク性を測定し
た。耐キンク性の測定は、図６に示すように、線材６８
を、直径12.5mmの丸棒６９に巻つけた後、丸棒６９を抜
き取り、図７に示すように線材６８の曲がり量を、直線
７０との距離Ｈとして測定し、その値を変形量とした。
その結果を表１に示す。なお、ステンレス製の芯線とそ
の外周に装着された形状記憶合金の筒状体とからなる線
材を実施例品とした。The kink resistance of these three types of wire was measured. As shown in FIG. 6, the kink resistance is measured by the wire rod 68.
Is wound on a round bar 69 having a diameter of 12.5 mm, the round bar 69 is removed, and the bending amount of the wire rod 68 is measured as a distance H with respect to a straight line 70 as shown in FIG. did.
The results are shown in Table 1. A wire made of a stainless steel core wire and a cylindrical body of a shape memory alloy attached to the outer periphery of the core wire was used as an example product.
【００４４】[0044]
【表１】 [Table 1]
【００４５】表１の結果から、実施例品の変形量は、ス
テンレス製の線材より小さいが、形状記憶合金製の線材
より大きい。すなわち、実施例品の耐キンク性は、ステ
ンレス製の線材より優れるが、形状記憶合金製の線材よ
り劣ることがわかる。From the results shown in Table 1, the deformation amount of the example product is smaller than that of the stainless steel wire rod, but is larger than that of the shape memory alloy wire rod. That is, it can be seen that the kink resistance of the example product is superior to the stainless steel wire rod but inferior to the shape memory alloy wire rod.
【００４６】次に、上記３種の線材の剛性を測定した。
剛性は、スパン15mmとして線材を乗せ、荷重とたわみ量
との関係を求めた。その結果を図８に示す。図８におい
て、△−△は実施例品、○−○は形状記憶合金製の線
材、□−□はステンレス製の線材の測定値を表す。Next, the rigidity of the above three kinds of wire rods was measured.
The rigidity was measured with a span of 15 mm, a wire rod was placed, and the relationship between the load and the amount of deflection was determined. FIG. 8 shows the result. In FIG. 8, Δ-Δ represents the example product, ◯-◯ represents the shape memory alloy wire, and □-□ represents the measured value of the stainless wire.
【００４７】また、たわみ量1 mmの時の測定荷重からヤ
ング率を求めた。その結果を表２に示す。The Young's modulus was calculated from the measured load when the amount of deflection was 1 mm. The results are shown in Table 2.
【００４８】[0048]
【表２】 [Table 2]
【００４９】図８、表２の結果から、実施例品の剛性
は、形状記憶合金製の線材より優れているが、ステンレ
ス製の線材より劣ることがわかる。From the results shown in FIG. 8 and Table 2, it is understood that the rigidity of the example product is superior to that of the shape memory alloy wire but inferior to that of the stainless wire.
【００５０】以上の測定結果から、実施例品は、形状記
憶合金製の線材の特性と、ステンレス製の線材の特性と
の中間の特性を示し、それによって、管状器官への挿入
具として必要とされる耐キンク性と適度な剛性とを兼ね
備えた、優れたものであることがわかる。From the above measurement results, the product of the embodiment shows a property intermediate between the properties of the wire rod made of the shape memory alloy and the wire rod made of stainless steel, which makes it necessary as an insertion tool for a tubular organ. It can be seen that this is an excellent one having both kink resistance and appropriate rigidity.
【００５１】[0051]
【発明の効果】以上説明したように、本発明の管状器官
への挿入具は、ステンレス製の芯線と形状記憶合金製の
筒状体とを一体化した線材を用いているので、適度な剛
性を有し、かつ、耐キンク性にも優れている。また、金
属コイルの基部を芯線の先端部にろう付けするととも
に、金属コイルの先端部に形成した頭部に芯線の先端部
又はそれから連接された安全ワイヤを固着しているの
で、金属コイルの離脱などの虞れが少ない、信頼性の高
い製品を提供することができる。更に、金属コイルのろ
う付けなどが容易になされるので、作業性が良好で、コ
ストも低減できる。As described above, since the insertion tool for tubular organs of the present invention uses the wire rod in which the core wire made of stainless steel and the tubular body made of the shape memory alloy are integrated, it has appropriate rigidity. And has excellent kink resistance. In addition, the base of the metal coil is brazed to the tip of the core wire, and the head of the metal coil is fixed to the tip of the core or a safety wire connected to the head, so that the metal coil can be removed. It is possible to provide a highly reliable product that is less likely to cause such problems. Furthermore, since brazing of the metal coil is easily performed, workability is good and cost can be reduced.
【図１】本発明の管状器官への挿入具の一実施例を示す
部分断面図である。FIG. 1 is a partial cross-sectional view showing an embodiment of an insertion tool for a tubular organ of the present invention.
【図２】本発明の管状器官への挿入具の他の実施例を示
す部分断面図である。FIG. 2 is a partial cross-sectional view showing another embodiment of the insertion tool for a tubular organ of the present invention.
【図３】本発明の管状器官への挿入具の更に他の実施例
を示す部分断面図である。FIG. 3 is a partial cross-sectional view showing still another embodiment of the insertion tool for a tubular organ of the present invention.
【図４】本発明の管状器官への挿入具において、芯線と
形状記憶合金の筒状体とを圧延により一体化した例を示
す部分断面図である。FIG. 4 is a partial cross-sectional view showing an example in which a core wire and a tubular body of a shape memory alloy are integrated by rolling in the insertion tool for a tubular organ of the present invention.
【図５】本発明の管状器官への挿入具において、芯線と
形状記憶合金の筒状体とをろう付けにより固着した例を
示す部分断面図である。FIG. 5 is a partial cross-sectional view showing an example in which a core wire and a tubular body of a shape memory alloy are fixed to each other by brazing in the insertion tool for a tubular organ of the present invention.
【図６】耐キンク性の測定のため、線材を丸棒に巻きつ
けた状態を示す斜視図である。FIG. 6 is a perspective view showing a state in which a wire rod is wound around a round bar for measuring kink resistance.
【図７】耐キンク性の測定において、線材を丸棒に巻つ
けた後、その変形量の測定の仕方を示す概念図である。FIG. 7 is a conceptual diagram showing how to measure the amount of deformation after winding a wire rod on a round bar in the measurement of kink resistance.
【図８】剛性の測定結果を示す図表である。FIG. 8 is a chart showing a measurement result of rigidity.
【図９】従来の管状器官への挿入具の一例を示す部分断
面図である。FIG. 9 is a partial cross-sectional view showing an example of a conventional insertion tool for a tubular organ.
１１、２１、３１ 管状器官への挿入具 １２、２２、３２ 芯線 １３、２３、３３ 筒状体 １４、２４、３４ 金属コイル １５、２５、３５ 頭部 ２６ 安全ワイヤ １７ 金属ろう材 11, 21, 31 Insertion device for tubular organ 12, 22, 32 Core wire 13, 23, 33 Cylindrical body 14, 24, 34 Metal coil 15, 25, 35 Head 26 Safety wire 17 Metal brazing material
Claims (6)
たステンレス製の芯線と、この芯線の前記先端部外周に
装着された金属コイルと、前記芯線の前記先端部を除く
部分の外周に装着された形状記憶合金の筒状体とを備
え、前記金属コイルの基端部は前記芯線の先端部の傾斜
した部分にろう付けされ、前記金属コイルの先端部には
溶融又はろう付けによって丸い頭部が形成され、前記芯
線の先端がこの丸い頭部に融着又はろう付けされている
ことを特徴とする管状器官への挿入具。1. A stainless-steel core wire formed so that its tip portion is gradually thinned, a metal coil attached to the outer circumference of the tip portion of the core wire, and an outer circumference of a portion of the core wire excluding the tip portion. And a cylindrical body of the shape memory alloy, wherein the base end of the metal coil is brazed to the inclined portion of the tip of the core wire, and the tip of the metal coil has a rounded head by melting or brazing. An inserter for a tubular organ, wherein a portion is formed, and the tip of the core wire is fused or brazed to the round head.
たステンレス製の芯線と、この芯線の前記先端部外周に
装着された金属コイルと、前記芯線の前記先端部を除く
部分の外周に装着された形状記憶合金の筒状体とを備
え、前記金属コイルの基端部は前記芯線の先端部の傾斜
した部分にろう付けされ、前記金属コイルの先端部には
溶融又はろう付けによって丸い頭部が形成され、前記芯
線の先端部に連接された安全ワイヤの先端がこの丸い頭
部に融着又はろう付けされていることを特徴とする管状
器官への挿入具。2. A stainless steel core wire whose tip portion is formed to be gradually thin, a metal coil attached to the outer circumference of the tip portion of the core wire, and an outer circumference of a portion of the core wire excluding the tip portion. And a cylindrical body of the shape memory alloy, wherein the base end of the metal coil is brazed to the inclined portion of the tip of the core wire, and the tip of the metal coil has a rounded head by melting or brazing. An inserter for a tubular organ, characterized in that a portion is formed and a tip of a safety wire connected to a tip portion of the core wire is fused or brazed to the round head.
芯線の外径が0.1 〜0.4 mm、前記筒状体の肉厚が0.02〜
0.2 mmとされている請求項１又は２記載の管状器官への
挿入具。3. The overall outer diameter of the insertion tool is 0.3 to 0.7 mm, the outer diameter of the core wire is 0.1 to 0.4 mm, and the wall thickness of the tubular body is 0.02 to
Insertion tool for a tubular organ according to claim 1 or 2, which is 0.2 mm.
が、接着又はろう付けにより固着されている請求項１〜
３のいずれか１つに記載の管状器官への挿入具。4. The core wire and the cylindrical body of the shape memory alloy are fixed to each other by adhesion or brazing.
The inserter for inserting into the tubular organ according to any one of 3 above.
が、圧延、クラッド又は伸線によって一体化されている
請求項１〜３のいずれか１つに記載の管状器官への挿入
具。5. The insertion tool for a tubular organ according to claim 1, wherein the core wire and the tubular body of the shape memory alloy are integrated by rolling, clad or wire drawing. .
前記形状記憶合金の筒状体の内径よりも小さくされ、前
記芯線及び前記金属コイルが、前記形状記憶合金の筒状
体から抜き出し可能とされている請求項１〜３のいずれ
か１つに記載の管状器官への挿入具。6. The outer diameters of the core wire and the metal coil are:
It is made smaller than the inner diameter of the tubular body of the shape memory alloy, and the core wire and the metal coil can be extracted from the tubular body of the shape memory alloy. Insertion tool into the tubular organ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15799894A JP3736864B2 (en) | 1994-06-16 | 1994-06-16 | Insertion tool for tubular organ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15799894A JP3736864B2 (en) | 1994-06-16 | 1994-06-16 | Insertion tool for tubular organ |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08734A true JPH08734A (en) | 1996-01-09 |
| JP3736864B2 JP3736864B2 (en) | 2006-01-18 |
Family
ID=15662017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15799894A Expired - Lifetime JP3736864B2 (en) | 1994-06-16 | 1994-06-16 | Insertion tool for tubular organ |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3736864B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950621A (en) * | 1984-11-06 | 1990-08-21 | Secretary of the State for Defence in Her Majesty's Government of the United Kingdom of Great Britain and Northern Ireland | Method of growing crystalline layers by vapor phase epitaxy |
| JP2001314513A (en) * | 2000-05-10 | 2001-11-13 | Asahi Intecc Co Ltd | Medical guide wire |
| JP2001340467A (en) * | 2000-06-05 | 2001-12-11 | Asahi Intecc Co Ltd | Medical guide wire and its linear body molding method |
| JP2017517339A (en) * | 2014-06-11 | 2017-06-29 | 先健科技（深▲せん▼）有限公司Ｌｉｆｅｔｅｃｈ Ｓｃｉｅｎｔｉｆｉｃ （Ｓｈｅｎｚｈｅｎ） Ｃｏ．，Ｌｔｄ | Lung volume reduced elastic implants and instruments |
-
1994
- 1994-06-16 JP JP15799894A patent/JP3736864B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950621A (en) * | 1984-11-06 | 1990-08-21 | Secretary of the State for Defence in Her Majesty's Government of the United Kingdom of Great Britain and Northern Ireland | Method of growing crystalline layers by vapor phase epitaxy |
| JP2001314513A (en) * | 2000-05-10 | 2001-11-13 | Asahi Intecc Co Ltd | Medical guide wire |
| JP2001340467A (en) * | 2000-06-05 | 2001-12-11 | Asahi Intecc Co Ltd | Medical guide wire and its linear body molding method |
| JP2017517339A (en) * | 2014-06-11 | 2017-06-29 | 先健科技（深▲せん▼）有限公司Ｌｉｆｅｔｅｃｈ Ｓｃｉｅｎｔｉｆｉｃ （Ｓｈｅｎｚｈｅｎ） Ｃｏ．，Ｌｔｄ | Lung volume reduced elastic implants and instruments |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3736864B2 (en) | 2006-01-18 |
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