JPH0332376B2 - - Google Patents
Info
- Publication number
- JPH0332376B2 JPH0332376B2 JP58129351A JP12935183A JPH0332376B2 JP H0332376 B2 JPH0332376 B2 JP H0332376B2 JP 58129351 A JP58129351 A JP 58129351A JP 12935183 A JP12935183 A JP 12935183A JP H0332376 B2 JPH0332376 B2 JP H0332376B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- catheter
- main body
- tubular
- resin layer
- 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
- 238000004519 manufacturing process Methods 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 43
- 239000011347 resin Substances 0.000 description 43
- 210000004204 blood vessel Anatomy 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 6
- 239000000806 elastomer Substances 0.000 description 6
- 239000004952 Polyamide Substances 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 208000007536 Thrombosis Diseases 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 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
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Description
【発明の詳細な説明】 発明の背景 技術分野 本発明はカテーテルとその製造方法に関する。[Detailed description of the invention] Background of the invention Technical field The present invention relates to a catheter and a method for manufacturing the same.
従来技術
第１図に示すようなカテーテル１は、例えばガ
イドワイヤ等に導かれて、血管等体腔内に挿入さ
れ、その先端の方向を制御されつつ目的の部位に
到達可能とされ、治療や検査を行うことを可能と
している。Prior Art A catheter 1 as shown in FIG. 1 is guided by a guide wire or the like and inserted into a body cavity such as a blood vessel, and is able to reach a target site while controlling the direction of its tip for treatment or examination. It is possible to do this.
そこで、このカテーテル１にあつては、本体部
２にある程度の硬さすなわち比較的小なる可撓性
を備えることを必要とされるとともに、先端部３
にある程度の柔軟さすなわち比較的大なる可撓性
を備えることを必要とされる。特に血管系のカテ
ーテル１においては、血管内に挿入され押し進め
されるものであることから、その先端部３は血管
壁を傷つけることのないように比較的大なる可撓
性を備えなければならず、その本体部２は押し進
める力を先端部３に適確に伝えるべく比較的小な
る可撓性を備えなければならない。 Therefore, in this catheter 1, the main body 2 is required to have a certain degree of hardness, that is, relatively small flexibility, and the distal end 3
It is necessary to have a certain degree of flexibility, that is, a relatively large amount of flexibility. Particularly in the catheter 1 for the vascular system, since it is inserted into the blood vessel and pushed forward, its tip 3 must have relatively high flexibility so as not to damage the blood vessel wall. , the main body 2 must have relatively little flexibility in order to properly transmit the pushing force to the tip 3.
従来、上記のような可撓性が比較的小なる本体
部２と、可撓性が比較的大なる先端部３とからな
るカテーテル１として、本体部２と先端部３とを
接着剤や融着等によつて接続してなるカテーテル
１が提案されている。しかしながら、上記従来提
案されているカテーテル１にあつては、製作工程
が煩雑になるとともに、本体部２と先端部３との
接続部に段差を生じ、血管等への挿入を円滑に行
うことが困難であり、血栓を生ずるおそれがあ
る。また、本体部２と先端部３との接続不良によ
り、両者間での離脱にともなう切断等を生ずるお
それがある。 Conventionally, as a catheter 1 consisting of a main body part 2 having relatively low flexibility and a distal end part 3 having relatively high flexibility as described above, the main body part 2 and the distal end part 3 have been bonded together using an adhesive or a melt. A catheter 1 has been proposed which is connected by a wire or the like. However, in the case of the conventionally proposed catheter 1, the manufacturing process is complicated, and there is a step at the connection between the main body part 2 and the distal end part 3, making it difficult to smoothly insert it into a blood vessel, etc. It is difficult and may cause blood clots. In addition, due to a poor connection between the main body part 2 and the tip part 3, there is a risk of disconnection or the like due to separation between the two.
発明の目的
本発明は第１に、可撓性が比較的小なる本体部
と、可撓性が比較的大なる先端部とを、確実にか
つ両者間に段差を形成することなく一体成形する
ことにより、上記従来技術の欠点を解消したカテ
ーテルを提供することを目的とする。 Purpose of the Invention The present invention firstly provides for integrally molding a main body portion with relatively low flexibility and a tip portion with relatively high flexibility reliably and without forming a step between the two. Accordingly, it is an object of the present invention to provide a catheter that eliminates the drawbacks of the above-mentioned prior art.
また、本発明は第２に、可撓性が比較的小なる
本体部と、可撓性が比較的大なる先端部とが、確
実に両者間に段差を形成することなく一体成形さ
れてなるカテーテルを容易に製造可能とする製造
方法を提供することを目的とする。 In addition, the present invention has a second feature that the main body portion having relatively low flexibility and the tip portion having relatively high flexibility are integrally molded without forming a step between the two. It is an object of the present invention to provide a manufacturing method that allows easy manufacturing of catheters.
発明の構成
上記目的を達成するために、本発明は第１に、
可撓性が比較的小なる管状本体部と、可撓性が比
較的大なる管状先端部とが軸方向に一体に成形さ
れてなるカテーテルにおいて、該本体部に内層と
して存在し、可撓性を比較的小とする管状の第１
の層と、該本体部および該先端部に連続して存在
し、該第１の層上に一部を一体的に被覆成形さ
れ、可撓性を比較的大とする管状の第２の層とか
らなり、該第１の層の内面と該第２の層の内面は
少なくとも該両層の境界部において滑らかに連続
してなるようにしたものである。 Structure of the Invention In order to achieve the above object, the present invention firstly has the following features:
In a catheter in which a tubular main body with relatively low flexibility and a tubular distal end with relatively high flexibility are integrally molded in the axial direction, a flexible A tubular first tube with a relatively small
a tubular second layer that is continuously present in the main body portion and the distal end portion, is partially integrally coated on the first layer, and has relatively high flexibility. The inner surface of the first layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers.
また、本発明は、本体部の曲げ弾性率が2800〜
3200Kg／cm2であり、先端部の曲げ弾性率が1000〜
1400Kg／cm2であるようにしたものである。 In addition, the present invention has a bending elastic modulus of the main body of 2800 to 2800.
3200Kg/ cm2 , and the bending modulus of the tip is 1000~
The weight was set at 1400Kg/cm 2 .
また、本発明は第２に、可撓性が比較的小なる
管状本体部と、可撓性が比較的大なる管状先端部
とが軸方向に一体に成形されてなるカテーテルの
製造方法において、該本体部に内層として存在
し、可撓性を比較的小とする管状の第１の層を成
形し、該本体部および該先端部に連続して存在
し、可撓性を比較的大とする第２の層を該第１の
層を貫通して位置させた芯棒上および該第１の層
に被覆成形し、その後、該第１の層および該第２
の層から該芯棒を引抜き、該第１の層の内面と該
第２の層の内面を少なくとも該両層の境界部にお
いて滑らかに連続させるようにしたものである。 A second aspect of the present invention provides a method for manufacturing a catheter in which a tubular body portion having relatively low flexibility and a tubular tip portion having relatively high flexibility are integrally molded in the axial direction. A tubular first layer that exists as an inner layer in the main body and has relatively low flexibility is molded, and a tubular first layer that exists continuously in the main body and the tip and has relatively high flexibility. A second layer is overmolded onto the core rod positioned through the first layer and onto the first layer, and then the first layer and the second layer are overmolded.
The core rod is pulled out from the layer, and the inner surface of the first layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers.
また、本発明は、本体部の曲げ弾性率が2800〜
3200Kg／cm2であり、先端部の曲げ弾性率が1000〜
1400Kg／cm2であるようにしたものである。 In addition, the present invention has a bending elastic modulus of the main body of 2800 to 2800.
3200Kg/ cm2 , and the bending modulus of the tip is 1000~
The weight was set at 1400Kg/cm 2 .
発明の具体的説明
第２図は本発明の第１実施例に係るカテーテル
１０を示す断面図、第３図ＡおよびＢは同カテー
テル１０の製造過程を示す断面図である。 DETAILED DESCRIPTION OF THE INVENTION FIG. 2 is a sectional view showing a catheter 10 according to a first embodiment of the invention, and FIGS. 3A and 3B are sectional views showing the manufacturing process of the catheter 10.
カテーテル１０は、第２図に示すように、長さ
L1の本体部にのみ存在する、本発明における第
１の層としての円筒状の第１の樹脂層１２と、本
体部１１および長さL2の先端部１３に連続して
存在し、その本体部１１を形成する一部を第１の
樹脂層１２上に一体的に被覆成形してなる、本発
明における第２の層としての略円筒状の第２の樹
脂層１４とからなつている。 The catheter 10 has a length as shown in FIG.
A cylindrical first resin layer 12 as the first layer in the present invention exists only in the main body part of L1, and a cylindrical first resin layer 12 exists continuously in the main body part 11 and the tip part 13 of length L2, and the main body part A substantially cylindrical second resin layer 14 as the second layer in the present invention is formed by integrally covering and molding a part of the resin layer 11 on the first resin layer 12 .
ここで、第１の樹脂層１２の内径と第２の樹脂
層１４の内径は同一とされ、両樹脂層１２，１４
の境界部は滑らかに連続化されている。尚、本発
明において滑らかに連続するとは、境界部におい
て実質上段差がなく連続することを意味する。す
なわち、カテーテル１０は、第２の樹脂層１４の
外径をその外径とされ、第１の樹脂層１２および
第２の樹脂層１４の内径をその内径とされてい
る。 Here, the inner diameter of the first resin layer 12 and the inner diameter of the second resin layer 14 are the same, and both the resin layers 12, 14
The boundaries of are smoothly continuous. In the present invention, the term "smoothly continuous" means that there is substantially no difference in level at the boundary. That is, the catheter 10 has the outer diameter of the second resin layer 14 as its outer diameter, and the inner diameter of the first resin layer 12 and the second resin layer 14 as its inner diameter.
また、第１の樹脂層１２は、本体部１１に存在
するものであることからその可撓性を第２の樹脂
層１４の可撓性に比して比較的小とされ、例え
ば、曲げ弾性率2800〜3200Kg／cm2、好ましくは
3000Kg／cm2のポリアミドエラストマーから形成さ
れている。これに対し、第２の樹脂層１４は、そ
の可撓性と比較的大とされ、例えば曲げ弾性率
1000〜1400Kg／cm2、好ましくは1200Kg／cm2のポリ
アミドエラストマーから形成されている。すなわ
ち、カテーテル１０の本体部１１は、可撓性の比
較的小なる第１の樹脂層１２と可撓性の比較的大
なる第２の樹脂層１４によつて構成され、全体と
してその可撓性を比較的小とされている。また、
カテーテル１０の先端部１３は、可撓性の比較的
大なる第２の樹脂層１４によつてのみ構成され、
その可撓性を比較的大とされている。 Furthermore, since the first resin layer 12 is present in the main body 11, its flexibility is relatively small compared to that of the second resin layer 14, and for example, bending elasticity is Rate 2800-3200Kg/cm 2 , preferably
Made from 3000Kg/cm 2 polyamide elastomer. On the other hand, the second resin layer 14 has relatively high flexibility, for example, a bending modulus of elasticity.
It is made of polyamide elastomer with a weight of 1000 to 1400 Kg/cm 2 , preferably 1200 Kg/cm 2 . That is, the main body 11 of the catheter 10 is composed of a first resin layer 12 with relatively low flexibility and a second resin layer 14 with relatively high flexibility, and the flexibility as a whole is It is said to have a relatively small size. Also,
The distal end portion 13 of the catheter 10 is composed only of a relatively flexible second resin layer 14,
Its flexibility is said to be relatively high.
なお、このカテーテル１０にあつては、本体部
１１の端部にカテーテルハブを接続し、先端部１
３に必要な屈曲形状を与えられた後、使用に供さ
れる。 In this catheter 10, a catheter hub is connected to the end of the main body 11, and the tip 1 is connected to the catheter hub.
3. After being given the necessary bent shape, it is ready for use.
上記第１実施例によれば、可撓性が比較的小な
る本体部１１と可撓性が比較的大なる先端部１３
とが一体成形されてなるカテーテル１０を得るこ
とが可能となる。したがつて、本体部１１と先端
部１３との接続部に段差を生ずることなく、血管
等への挿入を円滑に行うことが可能となるととも
に、血栓を生じにくく、また本体部１１と先端部
１３との間で離脱を生ずるおそれもない。 According to the first embodiment, the main body portion 11 has relatively low flexibility and the tip portion 13 has relatively high flexibility.
It becomes possible to obtain a catheter 10 in which the two are integrally molded. Therefore, it is possible to smoothly insert the body part 11 and the distal end part 13 into a blood vessel etc. without creating a step at the connection part, and it is difficult to cause blood clots. There is no risk of a separation between the two countries.
次に上記カテーテル１０の製造方法について説
明する。まず、必要なカテーテル１０の長さより
も長い、本発明における芯棒としての、例えば銀
線、銅線等からなる芯金１５上に、第３図Ａに示
すように、可撓性の比較的小なる第１の樹脂層１
２を被覆成形する。この第１の樹脂層１２は、円
筒状とされ本体部１１の長さL1よりも長い範囲
に被覆される。例えば、長さ150cm、外径1.4mmの
芯金１５に、芯金１５の一端から110cmの長さで、
外径1.9mmの第１の樹脂層１２を被覆する。 Next, a method for manufacturing the catheter 10 will be described. First, as shown in FIG. 3A, a flexible relatively Small first resin layer 1
2 is coated and molded. This first resin layer 12 has a cylindrical shape and covers an area longer than the length L1 of the main body part 11. For example, for a core bar 15 with a length of 150 cm and an outer diameter of 1.4 mm, a length of 110 cm from one end of the core bar 15,
A first resin layer 12 having an outer diameter of 1.9 mm is coated.
次に、芯金１５上および上記第１の樹脂層１２
上に、第１の樹脂層１２に比して可撓性の比較的
大なる樹脂材料からなる第２の樹脂層１４を被覆
成形する。この第２の樹脂層１４は、長さL1の
本体部１１および長さL2の先端部１３にわたつ
て連続的に被覆される。例えば、外径2.3mmの第
２の樹脂層１４を、芯金１５と第１の樹脂層１２
の上面に被覆する。 Next, on the core metal 15 and the first resin layer 12
A second resin layer 14 made of a resin material having relatively greater flexibility than the first resin layer 12 is formed on top. This second resin layer 14 continuously covers the main body portion 11 having a length L1 and the tip portion 13 having a length L2. For example, the second resin layer 14 with an outer diameter of 2.3 mm is placed between the core bar 15 and the first resin layer 12.
Coat the top surface of the
次に、上記第１の樹脂層１２および第２の樹脂
層１４から芯金１５を引抜き、必要な長さに切断
し、カテーテル１０を得る。すなわち、第１の樹
脂層１２と第２の樹脂層１４が重なつている部分
を本体部１１とし、第２の樹脂層１４のみからな
つている部分を先端部１３として用いる。例え
ば、第１の樹脂層１２に曲げ弾性率2800〜3200
Kg／cm2、好ましくは3000Kg／cm2のポリアミドエラ
ストマーを用い、第２の樹脂層１４に曲げ弾性率
1000〜1400Kg／cm2、好ましくは1200Kg／cm2のポリ
アミドエラストマーを用いるものとすれば、可撓
性が比較的小なる本体部１１と可撓性が比較的大
なる先端部１３からなるカテーテル１０を得るこ
とが可能となる。すなわち、上記製造方法によれ
ば、本発明に係るカテーテル１０を容易に製造す
ることが可能となる。 Next, the core bar 15 is pulled out from the first resin layer 12 and the second resin layer 14 and cut into a required length to obtain the catheter 10. That is, the portion where the first resin layer 12 and the second resin layer 14 overlap is used as the main body portion 11, and the portion consisting only of the second resin layer 14 is used as the tip portion 13. For example, the first resin layer 12 has a bending elastic modulus of 2800 to 3200.
Kg/cm 2 , preferably 3000 Kg/cm 2 polyamide elastomer is used, and the second resin layer 14 has a flexural modulus of elasticity of
If a polyamide elastomer of 1000 to 1400 Kg/cm 2 , preferably 1200 Kg/cm 2 is used, the catheter 10 consists of a main body portion 11 with relatively low flexibility and a tip portion 13 with relatively high flexibility. It becomes possible to obtain. That is, according to the above manufacturing method, it is possible to easily manufacture the catheter 10 according to the present invention.
第４図は本発明の第２実施例に係るカテーテル
２０を示す断面図、第５図ＡおよびＢは同カテー
テル２０の製造過程を示す断面図であり、前記カ
テーテル１０における同一部分は同一符号を付す
ものとする。 FIG. 4 is a sectional view showing a catheter 20 according to a second embodiment of the present invention, and FIGS. 5A and 5B are sectional views showing the manufacturing process of the same catheter 20. Identical parts in the catheter 10 are designated by the same reference numerals. shall be attached.
このカテーテル２０が前記カテーテル１０と異
なる点は、第１の樹脂層１２と第２の樹脂層１４
との間に、例えば線径0.08mmのステンレス鋼線か
らなるワイヤ層２１を例えばピツチ１mmで編んだ
点のみにある。 This catheter 20 is different from the catheter 10 described above in that the first resin layer 12 and the second resin layer 14
A wire layer 21 made of, for example, stainless steel wire with a wire diameter of 0.08 mm is woven at a pitch of, for example, 1 mm between the two wires.
したがつて、この第２実施例によれば、上記カ
テーテル１０と同様な本体部１１と先端部１３と
を確実にかつ両者間に段差を形成することなく一
体成形可能とするとともに、本体部１１のねじり
剛性を大とし、本体部１１に加えるねじり操作に
よつて先端部１３をより適確に方向づけることが
可能なカテーテル２０を得ることが可能となる。 Therefore, according to the second embodiment, the main body part 11 and the distal end part 13 similar to the catheter 10 can be integrally molded reliably and without forming a step between them, and the main body part 11 It is possible to obtain a catheter 20 that has high torsional rigidity and can more accurately orient the distal end portion 13 by twisting the main body portion 11.
次に、上記カテーテル２０の製造方法について
説明する。このカテーテル２０の製造方法が前記
カテーテル１０の製造方法と異なる点は、芯金１
５上への第１の樹脂層１２の被覆成形の後、第５
図Ａに示すように、第１の樹脂層１２上にワイヤ
層２１を編み、その後、第５図Ｂに示すように、
第１の樹脂層１２およびワイヤ層２１上ならびに
芯金１５上に第２の樹脂層１４を被覆成形する点
のみにある。すなわち、この製造方法によれば、
本発明に係るカテーテル２０を容易に製造するこ
とが可能となる。 Next, a method for manufacturing the catheter 20 will be described. The manufacturing method of this catheter 20 differs from the manufacturing method of the catheter 10 described above in that the core metal 1
After coating and molding the first resin layer 12 on the top of the fifth resin layer 12,
As shown in Figure A, the wire layer 21 is knitted on the first resin layer 12, and then, as shown in Figure 5B,
The only difference is that the second resin layer 14 is coated and molded on the first resin layer 12 and the wire layer 21 and on the core metal 15. That is, according to this manufacturing method,
It becomes possible to easily manufacture the catheter 20 according to the present invention.
なお、カテーテル１０，２０の構成材料として
は、ポリアミドエラストマーに限らず、ポリウレ
タンエラストマー、ポリエステルエラストマー、
ポリエチレン等の可撓性プラスチツクを広く用い
ることが可能である。 Note that the material for constructing the catheters 10 and 20 is not limited to polyamide elastomer, but may also include polyurethane elastomer, polyester elastomer,
Flexible plastics such as polyethylene can be widely used.
なお、所望によりカテーテル１０，２０の外表
面に生体適合性のある材料、例えばシリコーン樹
脂、シリコーンウレタン共重合体、セグメントポ
リウレタン等の層を設けることによりさらに生体
適合性に優れたカーテンを得ることができる。 Additionally, if desired, a curtain with even better biocompatibility can be obtained by providing a layer of a biocompatible material such as silicone resin, silicone urethane copolymer, segmented polyurethane, etc. on the outer surface of the catheters 10 and 20. can.
また、本発明に係るカテーテルの製造方法にお
いては、第１の層あるいは第１の層とワイヤ層を
成形後、その内部に芯棒を挿入し、それらの上に
第２の層を被覆成形し、その後芯棒を引抜くよう
にしてもよい。 Further, in the method for manufacturing a catheter according to the present invention, after forming the first layer or the first layer and the wire layer, a core rod is inserted therein, and a second layer is coated and formed on top of the core rod. , and then the core rod may be pulled out.
発明の具体的効果
以上のように、本発明の第１は、可撓性が比較
的小なる管状本体部と、可撓性が比較的大なる管
状先端部とが軸方向に一体に成形されてなるカテ
ーテルにおいて、該本体部に内層として存在し、
可撓性を比較的小とする管状の第１の層と、該本
体部および該先端部に連続して存在し、該第１の
層上に一部を一体的に被覆成形され、可撓性を比
較的大とする管状の第２の層とからなり、該第１
の層の内面と該第２の層の内面は少なくとも該両
層の境界部において滑らかに連続してなるように
したものである。したがつて、本発明の第１によ
れば、本体部と先端部とが確実にかつ両者間に段
差を形成することなく一体成形されてなるカテー
テルを得ることが可能となる。 Specific Effects of the Invention As described above, the first aspect of the present invention is that the tubular body portion having relatively low flexibility and the tubular tip portion having relatively high flexibility are integrally molded in the axial direction. present as an inner layer in the main body,
A tubular first layer having relatively low flexibility, which is continuously present in the main body portion and the tip portion, and is partially integrally coated on the first layer, and is flexible. a tubular second layer having a relatively large strength;
The inner surface of the second layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers. Therefore, according to the first aspect of the present invention, it is possible to obtain a catheter in which the main body portion and the distal end portion are integrally molded reliably and without forming a step between the two.
よつて、カテーテルの本体部と先端部の境界部
は滑らかであり、血管等への挿入を円滑に行うこ
とができる。また、両者間に段差がないことによ
り血液に対して悪影響を与えることがなく、血管
内での血液凝固すなわち血栓を生じさせたりする
ことがない。さらに、本体部と先端部の夫々は切
れ目がなく連続して成形されているため、両者を
接着剤等により接続した場合のような接続不良に
よる両者の離脱といつた危険がない。 Therefore, the boundary between the main body and the distal end of the catheter is smooth, allowing smooth insertion into a blood vessel or the like. In addition, since there is no step between the two, there is no adverse effect on blood, and no blood coagulation, that is, thrombus, occurs within the blood vessel. Furthermore, since the main body portion and the tip portion are each molded continuously without any breaks, there is no risk of separation of the two due to a poor connection, as would be the case if the two were connected with adhesive or the like.
また、本体部と先端部はその内面が境界部にお
いて滑らかに連続しているため、ガイドワイヤ等
への挿入も円滑に行うことができる。 Further, since the inner surfaces of the main body and the distal end are smoothly continuous at the boundary, insertion into a guide wire or the like can be performed smoothly.
また、本発明の第２は、可撓性が比較的小なる
管状本体部と、可撓性が比較的大なる管状先端部
とが軸方向に一体に成形されてなるカテーテルの
製造方法において、該本体部に内層として存在
し、可撓性を比較的小とする管状の第１の層を成
形し、該本体部および該先端部に連続して存在
し、可撓性を比較的大とする第２の層を該第１の
層を貫通して位置させた芯棒上および該第１の層
上に被覆成形し、その後、該第１の層および該第
２の層から該芯棒を引抜き、該第１の層の内面と
該第２の層の内面を少なくとも該両層の境界部に
おいて滑らかに連続させるようにしたものであ
る。 A second aspect of the present invention is a method for manufacturing a catheter in which a tubular main body portion having relatively low flexibility and a tubular tip portion having relatively high flexibility are integrally molded in the axial direction. A tubular first layer that exists as an inner layer in the main body and has relatively low flexibility is molded, and a tubular first layer that exists continuously in the main body and the tip and has relatively high flexibility. A second layer is coated on the core rod located through the first layer and on the first layer, and then the core rod is formed from the first layer and the second layer. The inner surface of the first layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers.
したがつて、本発明の第２によれば、可撓性の
異なる本体部と先端部とが確実にかつ両者間に段
差を形成することなく一体成形されてなるカテー
テルを容易に製造することが可能となる。 Therefore, according to the second aspect of the present invention, it is possible to easily manufacture a catheter in which the main body portion and the distal end portion, which have different flexibilities, are integrally molded reliably and without forming a step between the two. It becomes possible.
また本体部と先端部の内面をその境界部におい
て滑らかに連続して形成することができる。 Further, the inner surfaces of the main body and the tip can be formed to be smoothly continuous at the boundary.
さらに本体部の曲げ弾性率を2800〜3200Kg／
cm2、好ましくは3000Kg／cm2とすることにより、カ
テーテルを血管内に挿入するときに押し進める力
を先端部に適確に伝えることができる。また、先
端部の曲げ弾性率1000〜1400Kg／cm2、好ましくは
1200Kg／cm2とすることにより、カテーテルを血管
内に挿入するときに血管壁を傷つけることなく挿
入可能な可撓性を与えることができる。 Furthermore, the bending elastic modulus of the main body was increased to 2800 to 3200 kg/
cm 2 , preferably 3000 Kg/cm 2 , it is possible to accurately transmit the pushing force to the tip when inserting the catheter into the blood vessel. In addition, the bending elastic modulus of the tip part is 1000 to 1400 Kg/cm 2 , preferably
By setting the weight to 1200 Kg/cm 2 , it is possible to provide flexibility that allows the catheter to be inserted into a blood vessel without damaging the blood vessel wall.
第１図は一般のカテーテルを示す平面図、第２
図は本発明の第１実施例に係るカテーテルを示す
断面図、第３図ＡおよびＢは同第１実施例に係る
カテーテルの製造過程を示す断面図、第４図は本
発明の第２実施例に係るカテーテルを示す断面
図、第５図ＡおよびＢは同第２実施例に係るカテ
ーテルの製造過程を示す断面図である。
１０，２０……カテーテル、１１……本体部、
１２……第１の樹脂層、１３……先端部、１４…
…第２の樹脂層、１５……芯金。
Figure 1 is a plan view showing a general catheter, Figure 2 is a plan view showing a general catheter;
The figure is a sectional view showing a catheter according to a first embodiment of the present invention, FIGS. 3A and 3B are sectional views showing the manufacturing process of the catheter according to the first embodiment, and FIG. 4 is a sectional view showing a catheter according to a second embodiment of the present invention. FIGS. 5A and 5B are cross-sectional views showing the manufacturing process of the catheter according to the second embodiment. 10, 20...Catheter, 11... Main body,
12...First resin layer, 13...Tip portion, 14...
...Second resin layer, 15...Core metal.
Claims (1)
が比較的大なる管状先端部とが軸方向に一体に成
形されてなるカテーテルにおいて、該本体部に内
層として存在し、可撓性を比較的小とする管状の
第１の層と、該本体部および該先端部に連続して
存在し、該第１の層上に一部を一体的に被覆成形
され、可撓性を比較的大とする管状の第２の層と
からなり、該第１の層の内面と該第２の層の内面
は少なくとも該両層の境界部において滑らかに連
続してなることを特徴とするカテーテル。 ２ 本体部の曲げ弾性率が2800〜3200Kg／cm2であ
り、先端部の曲げ弾性率が1000〜1400Kg／cm2であ
る特許請求の範囲第１項記載のカテーテル。 ３ 可撓性が比較的小なる管状本体部と、可撓性
が比較的大なる管状先端部とが軸方向に一体に成
形されてなるカテーテルの製造方法において、該
本体部に内層として存在し、可撓性を比較的小と
する管状の第１の層を成形し、該本体部および該
先端部に連続して存在し、可撓性を比較的大とす
る第２の層を該第１の層を貫通して位置させた芯
棒上および該第１の層上に被覆成形し、その後、
該第１の層および該第２の層から該芯棒を引抜
き、該第１の層の内面と該第２の層の内面を少な
くとも該両層の境界部において滑らかに連続させ
ることを特徴とするカテーテルの製造方法。 ４ 本体部の曲げ弾性率が2800〜3200Kg／cm2であ
り、先端部の曲げ弾性率が1000〜1400Kg／cm2であ
る特許請求の範囲第３項記載のカテーテルの製造
方法。[Scope of Claims] 1. A catheter in which a tubular main body with relatively low flexibility and a tubular tip with relatively high flexibility are integrally molded in the axial direction, wherein the main body has an inner layer. a tubular first layer with relatively low flexibility; a tubular first layer that exists continuously in the main body portion and the tip portion, and is partially integrally coated on the first layer; and a tubular second layer having relatively high flexibility, and the inner surface of the first layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers. A catheter characterized by: 2. The catheter according to claim 1, wherein the main body portion has a bending elastic modulus of 2800 to 3200 Kg/cm 2 and the tip portion has a bending elastic modulus of 1000 to 1400 Kg/cm 2 . 3. A method for manufacturing a catheter in which a tubular main body with relatively low flexibility and a tubular distal end with relatively high flexibility are integrally molded in the axial direction. , a tubular first layer having relatively low flexibility is molded, and a second layer having relatively high flexibility, which is continuously present in the main body portion and the tip portion, is molded. A coating is formed on a core rod positioned through one layer and on the first layer, and then,
The core rod is pulled out from the first layer and the second layer, and the inner surface of the first layer and the inner surface of the second layer are smoothly continuous at least at the boundary between the two layers. A method for manufacturing a catheter. 4. The method for manufacturing a catheter according to claim 3, wherein the main body portion has a bending elastic modulus of 2800 to 3200 Kg/cm 2 and the tip portion has a bending elastic modulus of 1000 to 1400 Kg/cm 2 .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58129351A JPS6021767A (en) | 1983-07-18 | 1983-07-18 | Catheter and production thereof |
| JP2002438A JPH02232065A (en) | 1983-07-18 | 1990-01-11 | Catherter and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58129351A JPS6021767A (en) | 1983-07-18 | 1983-07-18 | Catheter and production thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002438A Division JPH02232065A (en) | 1983-07-18 | 1990-01-11 | Catherter and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6021767A JPS6021767A (en) | 1985-02-04 |
| JPH0332376B2 true JPH0332376B2 (en) | 1991-05-13 |
Family
ID=15007452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58129351A Granted JPS6021767A (en) | 1983-07-18 | 1983-07-18 | Catheter and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003501197A (en) * | 1999-06-11 | 2003-01-14 | サイムド ライフ システムズ， インコーポレイテッド | Sheath with large flexible middle for medical devices |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102390A (en) * | 1985-05-02 | 1992-04-07 | C. R. Bard, Inc. | Microdilatation probe and system for performing angioplasty in highly stenosed blood vessels |
| US4955862A (en) * | 1989-05-22 | 1990-09-11 | Target Therapeutics, Inc. | Catheter and catheter/guide wire device |
| JP2557276B2 (en) * | 1990-05-24 | 1996-11-27 | 日本ゼオン株式会社 | Medical tube |
| JPH05305143A (en) * | 1991-05-13 | 1993-11-19 | Sumitomo Bakelite Co Ltd | Medical catheter |
| JPH05305144A (en) * | 1991-05-13 | 1993-11-19 | Sumitomo Bakelite Co Ltd | Catheter for medical treatment |
| US7674245B2 (en) * | 2001-06-07 | 2010-03-09 | Cardiac Pacemakers, Inc. | Method and apparatus for an adjustable shape guide catheter |
| US7717899B2 (en) | 2002-01-28 | 2010-05-18 | Cardiac Pacemakers, Inc. | Inner and outer telescoping catheter delivery system |
-
1983
- 1983-07-18 JP JP58129351A patent/JPS6021767A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003501197A (en) * | 1999-06-11 | 2003-01-14 | サイムド ライフ システムズ， インコーポレイテッド | Sheath with large flexible middle for medical devices |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6021767A (en) | 1985-02-04 |
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