JPH0344543B2 - - Google Patents
Info
- Publication number
- JPH0344543B2 JPH0344543B2 JP62158146A JP15814687A JPH0344543B2 JP H0344543 B2 JPH0344543 B2 JP H0344543B2 JP 62158146 A JP62158146 A JP 62158146A JP 15814687 A JP15814687 A JP 15814687A JP H0344543 B2 JPH0344543 B2 JP H0344543B2
- Authority
- JP
- Japan
- Prior art keywords
- extension tube
- catheter body
- catheter
- core metal
- mold
- 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
- 239000002184 metal Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012815 thermoplastic material Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はそれぞれが円形でない複数内腔を有す
るカテーテルの延長チユーブ接続部がそれぞれ延
長チユーブの外形に対応する円形に形成された複
数内腔カテーテルおよびその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a multi-lumen catheter, each of which has a plurality of non-circular lumens, each of which has a plurality of non-circular lumens, each of which has a plurality of lumens, each of which has a circular extension tube connection portion corresponding to the external shape of the extension tube. and its manufacturing method.
複数内腔カテーテルにおいては、その内腔容積
をできるだけ大きく利用するために一般に内腔断
面形状は第２ｂ図に示す如く円形でない。しか
し、カテーテル本体に接続される延長チユーブの
断面形状は円形であることが多く、これらをその
まま接続しても気密な接続は得られない。
In multi-lumen catheters, the cross-sectional shape of the lumen is generally not circular as shown in FIG. 2b in order to utilize the lumen volume as much as possible. However, the cross-sectional shape of the extension tube connected to the catheter body is often circular, and even if they are connected as is, an airtight connection cannot be obtained.
これを解決するため、従来は内腔と同一形状の
成形物を介して接続する方法、あるいは接着剤で
カテーテル内腔と延長チユーブとの隙間を充填す
る方法が用いられていた。 To solve this problem, conventional methods have been used to connect the catheter through a molded product having the same shape as the lumen, or to fill the gap between the catheter lumen and the extension tube with an adhesive.
しかし、カテーテル内腔と同一形状の成形物を
介して接続する方法は製造コストが高くなり好ま
しくなく、他方、接着剤でカテーテル内腔と延長
チユーブとの隙間を充填する方法は完全な気密を
得ることが困難であるという問題がある。
However, the method of connecting via a molded product having the same shape as the catheter lumen increases manufacturing costs and is not preferable.On the other hand, the method of filling the gap between the catheter lumen and the extension tube with adhesive achieves complete airtightness. The problem is that it is difficult to
したがつて、本発明はカテーテル本体に延長チ
ユーブを簡単に、かつ気密性良く接続させること
ができる複数内腔カテーテル及びそのためのカテ
ーテル端部の形成方法を提供することを目的とす
る。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a multi-lumen catheter that allows an extension tube to be easily and airtightly connected to a catheter body, and a method for forming a catheter end portion thereof.
本発明は上記問題点を解決するための手段とし
て、カテーテル本体の延長チユーブ接続部を延長
チユーブと円滑に接続し得るような断面円形に加
熱成形するという手段を採用した。
In order to solve the above-mentioned problems, the present invention adopts a method of heat-forming the extension tube connecting portion of the catheter body into a circular cross-section so that it can be smoothly connected to the extension tube.
すなわち本発明は断面形状が円形でない複数の
内腔を有する熱可塑性材料からなるカテーテル本
体の延長チユーブ用接続部に、接続すべき延長チ
ユーブの接続端部外形にほぼ等しい腔部が形成さ
れていることを特徴とする複数内腔カテーテルを
提供するものである。 That is, in the present invention, a cavity approximately equal to the outer shape of the connection end of the extension tube to be connected is formed in the extension tube connection portion of the catheter body made of a thermoplastic material and having a plurality of lumens whose cross-sectional shape is not circular. The present invention provides a multi-lumen catheter characterized by the following.
さらに本発明は断面形状が円形でない複数の内
腔を有する熱可塑性材料からなるカテーテル本体
の延長チユーブ接続端に、接続すべき延長チユー
ブの外形にほぼ等しい芯金を圧入し、ついで、こ
のカテーテル本体の芯金圧入端部を加熱しつつ成
形型に導入し、該端部を軟化させて該芯金の外径
に対応する腔部を形成させたのち、冷却し、つい
で該芯金を引き抜くことを特徴とする複数内腔カ
テーテルの延長チユーブ接続部の形成方法を提供
するものである。 Further, in the present invention, a mandrel having a shape approximately equal to the external shape of the extension tube to be connected is press-fitted into the extension tube connection end of a catheter body made of a thermoplastic material having a plurality of lumens whose cross-sectional shape is not circular, and then the catheter body is The press-fitted end of the core metal is introduced into the mold while being heated, the end part is softened to form a cavity corresponding to the outer diameter of the core metal, and then cooled, and then the core metal is pulled out. A method of forming an extension tube connection portion of a multi-lumen catheter is provided.
なお、カテーテル本体の上記加熱成形をおこな
う場合、成形予定部分を予め軟化温度まで加熱
し、ついで、この成形予定部分を複数回に分けて
段階的に加熱しながら成形型内に導入し成形をお
こなうことが好ましい。 In addition, when performing the above-mentioned heating molding of the catheter body, the part to be molded is heated in advance to a softening temperature, and then the part to be molded is heated in stages in multiple steps while being introduced into a mold and molded. It is preferable.
本発明に係わる複数内腔カテーテル及びその延
長チユーブ接続部の形成方法によれば、この接続
部の内腔を延長チユーブの接続端の外形に合致す
るように芯金を用いて成形するようにしたから、
延長チユーブとの円滑、かつ、気密な接続を得る
ことができる。
According to the method for forming a multi-lumen catheter and its extension tube connection portion according to the present invention, the lumen of the connection portion is formed using a core metal so as to match the outer shape of the connection end of the extension tube. from,
A smooth and airtight connection with the extension tube can be obtained.
以下、本発明を図示の実施例を参照して説明す
る。
Hereinafter, the present invention will be explained with reference to the illustrated embodiments.
まず、第２ａ図に示すように、カテーテル本体
１の押出し成形により所定の外形を有する主要部
１ａと延長チユーブ接続用のテーパー状に拡がつ
た拡大基部１ｂとを、樹脂吐出量、引張り速度、
内腔内圧等の調整により連続的に成形し、所定の
長さにて切断する。その結果第２ｂ図に示す如き
断面形状が円形でない４つの内腔２ａ〜２ｄを有
する例えばポリ塩化ビニル製のカテーテル本体１
が得られる。 First, as shown in FIG. 2a, the main part 1a having a predetermined external shape by extrusion molding of the catheter body 1 and the tapered enlarged base part 1b for connecting the extension tube are formed by adjusting the amount of resin discharged, the pulling speed,
It is continuously shaped by adjusting the lumen internal pressure, etc., and cut at a predetermined length. As a result, a catheter body 1 made of polyvinyl chloride, for example, has four lumens 2a to 2d whose cross-sectional shape is not circular, as shown in FIG. 2b.
is obtained.
次に、第１ａ図および第１ｂ図に示す如く、各
内腔２ａ〜２ｄに、接続されるべき延長チユーブ
３（第４図参照）の外形にほぼ等しいステンレス
鋼製の芯金４を必要な深さまで圧入する。 Next, as shown in FIGS. 1a and 1b, a stainless steel core 4 having a diameter approximately equal to the external shape of the extension tube 3 to be connected (see FIG. 4) is placed in each of the inner cavities 2a to 2d. Press in to depth.
次に、カテーテル本体１を、ステンレス鋼製の
成形型５に、第１ａ図および第１ｂ図に示す如
く、一部分のみ導入した状態で熱風により加熱す
る。この場合の加熱温度はカテーテル本体１がや
や軟化する温度が好ましく、例えばポリ塩化ビニ
ル製のカテーテル本体１の場合、約40〜90℃が適
当である。なお、この軟化温度への加熱は成形型
５に導入する前に予めおこない、ついで加熱を持
続させながらカテーテル本体１を成形型５に導入
するようにしてもよい。 Next, the catheter body 1 is heated with hot air while only a portion thereof is introduced into a mold 5 made of stainless steel, as shown in FIGS. 1a and 1b. The heating temperature in this case is preferably a temperature at which the catheter body 1 becomes slightly soft, and for example, in the case of the catheter body 1 made of polyvinyl chloride, approximately 40 to 90°C is appropriate. Note that heating to this softening temperature may be performed in advance before introducing the catheter body 1 into the mold 5, and then the catheter body 1 may be introduced into the mold 5 while continuing the heating.
次に、カテーテル本体１の成形予定部１ｂの加
熱を持続しながら、カテーテル本体１を成形型５
内に引き入れる。しかして、カテーテル本体１の
末端部１ｃが成形型５の入口５ａの手前５〜20mm
迄、引き入れられたところで、カテーテル本体１
の引き入れを一旦停止し、カテーテル本体１の成
形予定部１ｂをさらに高い温度にて加熱する。こ
の場合の加熱温度は、成形予定部１ｂが充分に変
形可能な温度が好ましく、上記ポリ塩化ビニル製
カテーテルの場合は約100〜150℃に加熱すること
が好ましい。 Next, while continuing to heat the portion 1b of the catheter body 1 to be formed, the catheter body 1 is placed into the mold 5.
Pull it inside. Therefore, the distal end 1c of the catheter body 1 is 5 to 20 mm in front of the entrance 5a of the mold 5.
When the catheter body 1 is pulled in,
The drawing of the catheter body 1 is temporarily stopped, and the portion 1b of the catheter body 1 to be formed is heated to a higher temperature. The heating temperature in this case is preferably a temperature at which the portion to be formed 1b can be sufficiently deformed, and in the case of the above-mentioned polyvinyl chloride catheter, it is preferably heated to about 100 to 150°C.
成形予定部１ｂが変形温度に達したとき、第３
ａ図に示す如く、成形予定部１ｂを成形型５内に
完全に引き入れ、さらに加熱を１〜２分間持続す
ることにより芯金４の形状に合致した断面円形の
内腔２ｅ〜２ｈ（第３ｂ図参照）をカテーテル本
体１の接続端部に成形することができる。次に成
形型５を空冷又は水冷により冷却したのち、成形
型５からカテーテル本体１を取り出し、芯金４を
内腔２ｅ〜２ｈから抜き取り、成形工程が完了す
る。 When the forming portion 1b reaches the deformation temperature, the third
As shown in FIG. (see figure) can be molded onto the connecting end of the catheter body 1. Next, after the mold 5 is cooled by air cooling or water cooling, the catheter main body 1 is taken out from the mold 5, and the core bar 4 is extracted from the lumens 2e to 2h, thereby completing the molding process.
このように、カテーテル本体１の成形予定部１
ｂの加熱を複数段階に分けることによつて、カテ
ーテル本体１の引き入れ、および成形に最適な加
工温度を選択することができ、円滑な成形加工が
可能となる。 In this way, the portion 1 to be formed of the catheter body 1
By dividing the heating step b into multiple stages, it is possible to select the optimum processing temperature for drawing in and molding the catheter body 1, and smooth molding becomes possible.
このようにして成形されたカテーテル本体１の
内腔２ｅ〜２ｈに接着剤を塗布した延長チユーブ
３を挿入し接着剤を硬化させることにより、第４
図に示す如くカテーテル本体１と延長チユーブ３
との円滑かつ気密な接続を得ることができる。 By inserting the extension tube 3 coated with adhesive into the lumens 2e to 2h of the catheter main body 1 formed in this way and curing the adhesive, a fourth
As shown in the figure, the catheter body 1 and the extension tube 3
A smooth and airtight connection can be obtained.
なお、上記実施例においては、カテーテル本体
１の成形予定部１ｂの加熱を熱風を用いておこな
う例について説明したが、これ以外に、電熱線、
超音波、高周波等により、又はこれらを組合せて
おこなつてもよい。さらにカテーテル本体１の内
腔２ｅ〜２ｈと延長チユーブ３との接合は上述の
接着剤による方法以外に溶剤による溶着、超音波
融着、高周波融着によつておこなつてもよい。な
お、接着剤の例としてはエポキシ系、ポリウレタ
ン系、アクリル系、EVA系、シリコーン系、フ
エノール系等の適当なものを適宜選択し得る。 In the above embodiment, an example was described in which the portion 1b to be formed of the catheter body 1 was heated using hot air.
The treatment may be performed using ultrasonic waves, high frequencies, etc., or a combination of these. Furthermore, the lumens 2e to 2h of the catheter body 1 and the extension tube 3 may be joined by welding using a solvent, ultrasonic welding, or high frequency welding, in addition to the above-mentioned adhesive method. As examples of adhesives, suitable ones such as epoxy, polyurethane, acrylic, EVA, silicone, and phenol adhesives can be selected as appropriate.
本発明の方法によれば、断面非円形の複数の内
腔を有するカテーテル本体の延長チユーブ接続部
を、接続されるべき延長チユーブの形状に合致し
た断面円形の芯金を用いて加熱成形するようにし
たから延長チユーブとの接続を円滑、かつ気密に
おこなうことができる。
According to the method of the present invention, an extension tube connection portion of a catheter body having a plurality of lumens with a non-circular cross section is heat-formed using a core metal having a circular cross section that matches the shape of the extension tube to be connected. This allows for smooth and airtight connection with the extension tube.
さらに、本発明な好ましい方法として、カテー
テル本体の成形予定部の加熱を複数段階に分けて
おこなうようにしたため、カテーテル本体の引き
入れ、および成形に最適な加工温度を選択するこ
とができ、円滑な成形加工が可能となる。 Furthermore, as a preferred method of the present invention, heating of the portion of the catheter body to be formed is carried out in multiple stages, making it possible to select the optimum processing temperature for drawing in and forming the catheter body, thereby ensuring smooth forming. Processing becomes possible.
第１ａ図は本発明の方法を説明するための成形
機構の断面図、第１ｂ図は第１ａ図のＢ−Ｂ線に
沿う断面図、第２ａ図は複数内腔カテーテルの基
部の断面図、第２ｂ図は第２ａ図のＢ−Ｂ線に沿
う断面図、第３ａ図は第１図に示す工程に続く成
形機構を説明する断面図、第３ｂ図は第３ａ図の
Ｂ−Ｂ線に沿う断面図、第４図は本発明のカテー
テル本体と延長チユーブとの接続状態を示す側面
図である。
１……カテーテル本体、１ａ……カテーテル本
体主要部、１ｂ……拡大基部、２ａ〜２ｈ……内
腔、３……延長チユーブ、４……芯金、５……成
形型、５ａ……成形型入口。
FIG. 1a is a cross-sectional view of the forming mechanism for explaining the method of the present invention, FIG. 1b is a cross-sectional view taken along the line BB in FIG. 1a, and FIG. 2a is a cross-sectional view of the base of the multi-lumen catheter. Figure 2b is a cross-sectional view taken along the line B-B in Figure 2a, Figure 3a is a cross-sectional view explaining the forming mechanism following the process shown in Figure 1, and Figure 3b is a cross-sectional view taken along the line B-B in Figure 3a. FIG. 4 is a side view showing the state of connection between the catheter main body and the extension tube of the present invention. DESCRIPTION OF SYMBOLS 1... Catheter body, 1a... Catheter main body main part, 1b... Enlarged base, 2a-2h... Lumen, 3... Extension tube, 4... Core bar, 5... Molding die, 5a... Molding Mold entrance.
Claims (1)
ーテル本体とからなり、該カテーテル本体は、断
面形状が円形でない複数の内腔を有するカテーテ
ル本体主要部と、該延長チユーブを接続する接続
部とを備え、該接続部は該延長チユーブの接続端
部外形にほぼ等しく形成された腔部を有し、該延
長チユーブは該腔部内に挿入された状態で接続さ
れていることを特徴とする複数内腔カテーテル。 ２ 延長チユーブと、熱可塑性材料からなるカテ
ーテル本体とからなり、該カテーテル本体は、断
面形状が円形でない複数の内腔を有するカテーテ
ル本体主要部と、該延長チユーブを接続する接続
部とを備え、該接続部は該延長チユーブの接続端
部外形にほぼ等しく形成された腔部を有し、該延
長チユーブは該腔部内に挿入された状態で接続さ
れている複数内腔カテーテルの製造方法であつ
て、断面形状が円形でない複数の内腔を有する熱
可塑性材料からなるカテーテル本体の延長チユー
ブ用接続端に、接続すべき延長チユーブの外形に
ほぼ等しい芯金を圧入し、ついで、このカテーテ
ル本体の芯金圧入端部を加熱しつつ成形型に導入
し、該端部を軟化させて該芯金の外形に対応する
腔部を形成させたのち、冷却し、ついで該芯金を
引く抜き、さらにこの腔部に該延長チユーブを直
接接続することを特徴とする製造方法。 ３ カテーテル本体の芯金圧入端部を加熱成形型
に導入する前に予め該芯金圧入端部をカテーテル
本体の軟化温度まで予め加熱し、ついで、該芯金
圧入端部を複数回に分けて段階的に加熱しながら
成形型内に導入することを特徴とする特許請求の
範囲第２項記載の製造方法。 ４ カテーテル本体の芯金圧入端部を加熱成形型
に導入する前、又は部分的に導入したのちカテー
テル本体の成形予定部分を軟化温度まで予め加熱
し、ついで該成形予定部分を上記成形型内に導入
して、カテーテル本体の変形可能な温度まで加熱
したのち、該芯金圧入端部のほぼ全体を上記成形
型内に導入し成形し、ついで冷却し、腔部を形成
させることを特徴とする特許請求の範囲第３項記
載の製造方法。 ５ カテーテル本体の加熱手段が熱風、電熱線、
超音波、高周波のいずれか一種又はその組合せで
ある特許請求の範囲第２項記載の製造方法。[Scope of Claims] 1. Consists of an extension tube and a catheter body made of a thermoplastic material, and the catheter body connects the extension tube to a main portion of the catheter body having a plurality of lumens whose cross-sectional shape is not circular. a connecting portion, the connecting portion having a cavity formed approximately equal to the outer shape of the connecting end of the extension tube, and the extension tube being connected while being inserted into the cavity. Multi-lumen catheter. 2. consisting of an extension tube and a catheter main body made of a thermoplastic material, the catheter main body comprising a main part of the catheter main body having a plurality of lumens with a non-circular cross-sectional shape, and a connection part connecting the extension tube; The connecting portion has a cavity formed approximately equal to the outer shape of the connecting end of the extension tube, and the extension tube is inserted into the cavity and connected to the multi-lumen catheter. Then, a mandrel having approximately the same external shape as the extension tube to be connected is press-fitted into the connection end for the extension tube of a catheter body made of a thermoplastic material having a plurality of lumens whose cross-sectional shape is not circular. The press-fit end of the core metal is introduced into a mold while being heated, the end part is softened to form a cavity corresponding to the outer shape of the core metal, and then cooled, the core metal is pulled out, and then the core metal is pulled out. A manufacturing method characterized by directly connecting the extension tube to the cavity. 3. Before introducing the core metal press-fit end of the catheter body into the heating mold, the core metal press-fit end is preheated to the softening temperature of the catheter body, and then the core metal press-fit end is heated in multiple steps. The manufacturing method according to claim 2, characterized in that the method is introduced into a mold while being heated in stages. 4. Before or partially introducing the core press-fit end of the catheter body into the heating mold, the portion of the catheter body to be molded is preheated to a softening temperature, and then the portion to be molded is placed into the mold. After the core metal is introduced and heated to a temperature at which the catheter body can be deformed, substantially the entire press-fitted end of the core metal is introduced into the mold and molded, and then cooled to form a cavity. A manufacturing method according to claim 3. 5 The heating means for the catheter body is hot air, heating wire,
3. The manufacturing method according to claim 2, wherein the method is one of ultrasonic waves, high frequency waves, or a combination thereof.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-158146A JPH012658A (en) | 1987-06-25 | Multi-lumen catheter and method for manufacturing the same | |
| EP88906036A EP0366794B1 (en) | 1987-06-25 | 1988-06-25 | Method of production of multi-luminal catheter and multi-luminal catheter assembly |
| US07/449,934 US5041083A (en) | 1987-06-25 | 1988-06-25 | Multi-luminal catheter, multi-luminal catheter assembly |
| DE3852882T DE3852882T2 (en) | 1987-06-25 | 1988-06-25 | MANUFACTURING METHOD OF A BUILDING UNIT WITH A MULTILUMINAL CATHETER. |
| KR1019890700338A KR910002210B1 (en) | 1987-06-25 | 1988-06-25 | Multi - luminal catheter multi - luminal catheter assemblyand production thereof |
| PCT/JP1988/000634 WO1988010131A1 (en) | 1987-06-25 | 1988-06-25 | Multi-luminal catheter, multi-luminal catheter assembly and production thereof |
| AU19558/88A AU624076B2 (en) | 1987-06-25 | 1988-06-25 | Multi-luminal catheter, multi-luminal catheter assembly and production thereof |
| US07/665,790 US5178803A (en) | 1987-06-25 | 1991-03-07 | Method of manufacturing a multi-luminal catheter, and multi-luminal catheter assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-158146A JPH012658A (en) | 1987-06-25 | Multi-lumen catheter and method for manufacturing the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPS642658A JPS642658A (en) | 1989-01-06 |
| JPH012658A JPH012658A (en) | 1989-01-06 |
| JPH0344543B2 true JPH0344543B2 (en) | 1991-07-08 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| JPS642658A (en) | 1989-01-06 |
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