JP2792631B2 - Catheter using shape memory resin - Google Patents
Catheter using shape memory resinInfo
- Publication number
- JP2792631B2 JP2792631B2 JP1186533A JP18653389A JP2792631B2 JP 2792631 B2 JP2792631 B2 JP 2792631B2 JP 1186533 A JP1186533 A JP 1186533A JP 18653389 A JP18653389 A JP 18653389A JP 2792631 B2 JP2792631 B2 JP 2792631B2
- Authority
- JP
- Japan
- Prior art keywords
- catheter
- fluid
- temperature
- glass transition
- 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 - Fee Related
Links
- 239000011347 resin Substances 0.000 title claims description 9
- 229920005989 resin Polymers 0.000 title claims description 9
- 239000012530 fluid Substances 0.000 claims description 24
- 230000009477 glass transition Effects 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 230000010412 perfusion Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000002504 physiological saline solution Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000004891 communication Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001105 femoral artery Anatomy 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000002767 hepatic artery Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
Landscapes
- Materials For Medical Uses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は形状記憶樹脂を用いて形成されたカテーテル
に関する。Description: TECHNICAL FIELD The present invention relates to a catheter formed using a shape memory resin.
尚、ここで言う形状記憶樹脂とは、ガラス転移点の前
後における弾性率変化の比が２以上の樹脂組成物をい
う。Here, the shape memory resin refers to a resin composition having a ratio of change in elastic modulus before and after the glass transition point of 2 or more.
＜従来の技術＞ カテーテルには体腔内に挿入して患部の治療に供する
ものや、血圧、血液のガス分析などの診断に利用するも
のなど種々のものがあるが、これらのカテーテルは、挿
入操作を行っている間は比較的硬く、所望の位置に達し
た後は変形して閉塞等の生じない程度の柔軟性を有する
のが好ましい。<Conventional technology> There are various types of catheters, such as those that are inserted into a body cavity and used for treatment of an affected part, and those that are used for diagnosis such as blood pressure and blood gas analysis. It is preferable that the material is relatively hard during the operation, and has a degree of flexibility that does not cause blockage or the like after reaching a desired position.
従来、挿入前は硬く、挿入後は体温で柔軟になる塩化
ビニル製のカテーテルなどが使用されているが、体腔内
に挿入されると短時間で柔軟になってしまうので、所望
の位置までの挿入操作が難しく、かなりの熟練を必要と
していた。Conventionally, a catheter made of vinyl chloride, which is hard before insertion and becomes flexible at body temperature after insertion, has been used.However, when inserted into a body cavity, it becomes flexible in a short time, so it can be moved to a desired position. The insertion operation was difficult and required considerable skill.
＜発明が解決しようとする課題＞ 本発明は上記の事情に鑑みてなされたもので、体腔へ
の挿入操作中は比較的硬く、所定の位置に達した後は柔
らかくなるカテーテルを提供することを目的とする。<Problems to be Solved by the Invention> The present invention has been made in view of the above circumstances, and provides a catheter which is relatively hard during an insertion operation into a body cavity and becomes soft after reaching a predetermined position. Aim.
＜課題を解決するための手段＞ 本発明者は上記の課題を解決するために鋭意検討を行
った結果、硬度の変化が大きくかつガラス転移温度を自
由に選択できるという形状記憶樹脂に着目するに到り、
本発明を完成した。<Means for Solving the Problems> As a result of intensive studies to solve the above problems, the present inventor focused on a shape memory resin in which a change in hardness is large and a glass transition temperature can be freely selected. Arriving,
The present invention has been completed.
すなわち本発明は上記の課題を解決するために、平均
ガラス転移温度が20℃から37℃の間にあるポリウレタン
系形状記憶樹脂を用いて形成されており、その長手軸方
向に沿って流体を還流させる流体通路の往路と復路が先
端部分で連通されてなる、前記平均ガラス転移温度以上
の温度で柔軟になり冷たい流体の潅流により硬くなるカ
テーテルを採用している。That is, in order to solve the above problems, the present invention is formed using a polyurethane-based shape memory resin having an average glass transition temperature between 20 ° C. and 37 ° C., and circulates a fluid along the longitudinal axis direction. A catheter which is flexible at a temperature equal to or higher than the average glass transition temperature and hardened by perfusion of a cold fluid, wherein a forward path and a return path of a fluid passage to be communicated with each other at a distal end portion is adopted.
＜作用＞ 上記の構成によれば、所望の形状に固定化したカテー
テルを体腔内に挿入する場合、カテーテル挿入操作をた
とえば冷水を還流しながら行えば、少なくともカテーテ
ルの冷水に接した部分およびその隣接部分の温度はガラ
ス転移点以下に保たれる。従って、カテーテルの剛性が
維持された状態で挿入操作を行うことができる。そして
所定の位置にカテーテルが達した後、冷水の還流を中止
すれば、カテーテル全体の温度がガラス転移点以上にな
り、カテーテルは柔軟になる。<Operation> According to the above configuration, when inserting a catheter fixed in a desired shape into a body cavity, if the catheter insertion operation is performed while, for example, circulating cold water, at least a portion of the catheter in contact with the cold water and an adjacent portion thereof The temperature of the part is kept below the glass transition point. Therefore, the insertion operation can be performed in a state where the rigidity of the catheter is maintained. When the reflux of the cold water is stopped after the catheter reaches the predetermined position, the temperature of the entire catheter becomes higher than the glass transition point, and the catheter becomes flexible.
＜実施例＞ 次に本発明の実施例について図面に基づいて説明す
る。<Example> Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例に係るカテーテルの説明図
である。図において（１）は内腔、（２）は流体往路、
（３）は流体復路、（４）は連通路である。FIG. 1 is an explanatory view of a catheter according to one embodiment of the present invention. In the figure, (1) is a lumen, (2) is a fluid outward path,
(3) is a fluid return path, and (4) is a communication path.
本発明のカテーテルは平均ガラス転移温度が20℃から
37℃の間にあるポリウレタン系形状記憶樹脂で作られて
おり、カテーテルの長手軸方向に沿って流体通路が形成
されている。そして流体通路の往路（２）と復路（３）
とはカテーテルの先端部分に形成された連通路（４）で
連通されている。The catheter of the present invention has an average glass transition temperature of 20 ° C.
It is made of a polyurethane-based shape memory resin at a temperature between 37 ° C. and has a fluid passage formed along the longitudinal axis of the catheter. And the outward path (2) and the return path (3) of the fluid passage
Are communicated with each other through a communication passage (4) formed at the distal end portion of the catheter.
流体通路に還流される流体はガラス転移点よりも十分
に低い温度に維持されており、一般に10℃以下に維持さ
れる。流体としては一般に水または空気が使用される。The fluid recirculated to the fluid passage is maintained at a temperature well below the glass transition temperature, generally below 10 ° C. Generally, water or air is used as the fluid.
カテーテルには流体を吸引するポンプまたは流体を圧
送するポンプ（必要ならば両方）と、流体の温度を所定
の温度に維持するための温度制御装置を取り付けてもよ
い。The catheter may be provided with a pump for aspirating the fluid or a pump for pumping the fluid (both if necessary) and a temperature control device for maintaining the temperature of the fluid at a predetermined temperature.
〔実施例１〕 平均ガラス転移温度が35℃のポリウレタン系形状記憶
樹脂（三菱重工（株）製、MM−3500）を用いて、外径2m
m、長さ50cmの第１図に示すようなカテーテルを製作
し、カテーテル先端部を加温により柔軟にした後、その
先端部を所望の形状に変形させた状態で、流体通路に10
℃以下に維持された冷水を循環させて冷却し形状を固定
した。それから冷水を循環させながらカテーテルを直接
（ガイドワイヤーを使用せず）大腿動脈から挿入し、先
端が肝動脈に少し入った位置で留置した。この間、冷水
の循環は3kg加圧で40cc/分であり、挿入操作中カテーテ
ルはこれを前後させあるいは回転させるのに十分な剛性
を維持することができた。[Example 1] Using a polyurethane-based shape memory resin having an average glass transition temperature of 35 ° C (MM-3500, manufactured by Mitsubishi Heavy Industries, Ltd.), an outer diameter of 2 m
m, a catheter having a length of 50 cm as shown in FIG. 1 was manufactured, and the distal end portion of the catheter was made flexible by heating, and then the distal end portion was deformed into a desired shape.
Cooling was performed by circulating cold water maintained at a temperature of not more than 0 ° C. to fix the shape. Then, a catheter was directly inserted from the femoral artery (without using a guide wire) while circulating cold water, and was placed at a position where the tip was slightly inserted into the hepatic artery. During this time, the circulation of the cold water was 40 cc / min at a pressure of 3 kg, and the catheter was able to maintain sufficient rigidity to move it back and forth or rotate during the insertion operation.
カテーテル留置後、冷水の循環を中止するとカテーテ
ルは柔軟になり留置期間中（１週間）柔軟性を維持し続
けた。After the indwelling of the catheter, when the circulation of cold water was stopped, the catheter became flexible and continued to maintain the flexibility during the indwelling period (1 week).
＜発明の効果＞ 本発明のカテーテルは形状記憶樹脂を用いて作られて
おり、冷却用の流体通路を有しているので、挿入操作時
には硬く留置後には柔らかくすることができる。従っ
て、挿入操作が容易であり、しかも体腔内に留置してい
る間は違和感が少ないので、患者の肉体的苦痛が大幅に
軽減される。<Effect of the Invention> The catheter of the present invention is made of a shape memory resin and has a fluid passage for cooling, so that it can be made hard during insertion operation and soft after placement. Therefore, the insertion operation is easy, and there is little feeling of discomfort during the indwelling in the body cavity, so that the physical pain of the patient is greatly reduced.
第１図は本発明の実施例に係るカテーテルの説明図であ
り、図中（１）は内腔、（２）は流体往路、（３）は流
体復路、（４）は連通路である。FIG. 1 is an explanatory view of a catheter according to an embodiment of the present invention, wherein (1) is a lumen, (2) is a fluid outward path, (3) is a fluid return path, and (4) is a communication path.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−57271（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) A61L 29/00 A61M 25/00──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-57271 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) A61L 29/00 A61M 25/00
Claims (4)
あるポリウレタン系形状記憶樹脂を用いて形成されてお
り、その長手方向に沿って流体を潅流させる流体通路の
往路と復路が先端で連通されてなり、前記ガラス転移温
度以上の温度で柔軟になり該ガラス転移温度よりも十分
に低い温度に維持された流体の潅流により硬くなるカテ
ーテル。1. A fluid passage formed by using a polyurethane shape memory resin having an average glass transition temperature between 20.degree. C. and 37.degree. C., and having a forward end and a return end of a fluid passage for perfusing a fluid along its longitudinal direction. A catheter that is flexible at temperatures above the glass transition temperature and becomes stiff by perfusion of fluid maintained at a temperature well below the glass transition temperature.
テーテル。2. The catheter according to claim 1, wherein the fluid is physiological saline.
ル。3. The catheter according to claim 1, wherein the fluid is air.
ポンプ装置と、流体の温度を制御する温度制御装置が付
加されてなる請求項１記載のカテーテル。4. The catheter according to claim 1, further comprising a pump device for sucking and / or pumping the fluid and a temperature control device for controlling the temperature of the fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186533A JP2792631B2 (en) | 1989-07-18 | 1989-07-18 | Catheter using shape memory resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186533A JP2792631B2 (en) | 1989-07-18 | 1989-07-18 | Catheter using shape memory resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0349767A JPH0349767A (en) | 1991-03-04 |
| JP2792631B2 true JP2792631B2 (en) | 1998-09-03 |
Family
ID=16190159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1186533A Expired - Fee Related JP2792631B2 (en) | 1989-07-18 | 1989-07-18 | Catheter using shape memory resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792631B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2534949Y2 (en) * | 1991-02-28 | 1997-05-07 | 三菱電線工業株式会社 | X-ray contrast catheter |
| CA2062433C (en) | 1991-03-08 | 2000-02-29 | Takashi Matsumoto | Medical tube |
| ATE272988T1 (en) | 1996-11-18 | 2004-08-15 | Charles S Munn | ENERGY SHRINKING RUBBER PRODUCTS AND HYPOALLERGENIC RUBBER PRODUCTS |
| JP4570707B2 (en) * | 1998-06-02 | 2010-10-27 | テルモ株式会社 | Indwelling catheter |
| JP4570708B2 (en) * | 1998-06-02 | 2010-10-27 | テルモ株式会社 | Indwelling catheter made of polyurethane resin containing multiple polyglycols with different molecular weights |
| US10575715B2 (en) | 2015-04-02 | 2020-03-03 | Koninklijke Philips N.V. | Deflectable medical device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2523123B2 (en) * | 1987-02-26 | 1996-08-07 | チッソ株式会社 | Silane gas manufacturing method |
-
1989
- 1989-07-18 JP JP1186533A patent/JP2792631B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0349767A (en) | 1991-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |