JPH0626574B2 - catheter - Google Patents
catheterInfo
- Publication number
- JPH0626574B2 JPH0626574B2 JP3-236940A JP23694091A JPH0626574B2 JP H0626574 B2 JPH0626574 B2 JP H0626574B2 JP 23694091 A JP23694091 A JP 23694091A JP H0626574 B2 JPH0626574 B2 JP H0626574B2
- Authority
- JP
- Japan
- Prior art keywords
- main body
- tip
- catheter
- reinforcing layer
- 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
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- Media Introduction/Drainage Providing Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はカテーテルに関する。FIELD OF THE INVENTION The present invention relates to catheters.
【０００２】[0002]
【従来の技術】図１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
能とされている。2. Description of the Related Art A catheter 1 as shown in FIG. 1 is guided by, for example, a guide wire or the like and inserted into a body cavity such as a blood vessel, and can reach a target site while controlling the direction of its tip.
【０００３】そこで、このカテーテル１には、本体部２
の基部をねじってその先端部３を方向づけることが可能
なように、大なるねじり剛性を有することが要求され
る。また、先端部３に目的部位に挿入容易な形状を容易
に与えることが可能であり、挿入時の先端部３が血管等
の挿入経路変化に沿って容易に変形して血管等の内壁に
損傷を与えることがないように、先端部３に柔軟性が要
求される。Therefore, this catheter 1 has a main body 2
The tip 3 must have a large torsional rigidity so that the base can be twisted to orient the tip 3. The tip 3 must also be flexible so that it can be easily shaped to facilitate insertion into the target site and so that it does not easily deform along the insertion path of a blood vessel or the like during insertion, thereby damaging the inner wall of the blood vessel or the like.
【０００４】図２は、先端部に柔軟性を有し、かつ大な
るねじり剛性を有してなる従来のカテーテル４を示す一
部破断図である。カテーテル４は、可撓性の内管部５
と、可撓性の外管部６との間にワイヤ層７を介装するこ
とによってねじり剛性の大なる本体部８を形成してい
る。更に、このカテーテル４は、上記本体部８の外管部
６を一部除去した端部に比較的柔軟な先端部９を接続さ
れている。[0004] Figure 2 is a partially cutaway view showing a conventional catheter 4 having flexibility at the tip and high torsional rigidity. The catheter 4 has a flexible inner tube 5.
The catheter 4 has a main body 8 with high torsional rigidity, which is formed by interposing a wire layer 7 between the main body 8 and the flexible outer tube 6. Furthermore, the catheter 4 has a relatively flexible tip 9 connected to the end of the main body 8 where the outer tube 6 has been partially removed.
【０００５】図３は、先端部に柔軟性を有し、かつ大な
るねじり剛性を有してなる従来の他のカテーテル１０を
示す一部破断図である。このカテーテル１０は、可撓性
内管部１１の基端から先端手前まで第１ワイヤ層１２を
形成され、その先端手前から折り返して再び基端まで第
２ワイヤ層１３を形成された後、内管部１１および両ワ
イヤ層１２、１３の上面に可撓性外管部１４を被覆され
ている。3 is a partially cutaway view of another conventional catheter 10 having flexibility at its distal end and high torsional rigidity. This catheter 10 has a first wire layer 12 formed from the base end of a flexible inner tube 11 to just before the tip, a second wire layer 13 folded back just before the tip and again formed to the base end, and then a flexible outer tube 14 covering the upper surfaces of the inner tube 11 and both wire layers 12 and 13.
【０００６】[0006]
【発明が解決しようとする課題】然しながら、上記カテ
ーテル４にあっては、本体部８と先端部９との接続部に
段差を生じ、血管等への挿入を円滑に行なうことが困難
であり、血栓を生ずる虞れがある。また、本体部８と先
端部９との接続不良により、両者間で離脱を生ずる虞れ
がある。However, in the above-mentioned catheter 4, a step occurs at the connection between the main body 8 and the tip 9, making it difficult to smoothly insert the catheter into a blood vessel, etc., and there is a risk of thrombus formation. In addition, there is a risk of the main body 8 and the tip 9 becoming detached due to poor connection.
【０００７】また、上記カテーテル１０は、本体部を構
成する内管部１１と外管部１４との間に、二層の第１ワ
イヤ層１２および第２ワイヤ層１３からなる補強層が介
装されていることから、補強層の厚みが大となり、カテ
ーテルが挿入される血管等の挿入路内径により定まる所
定のカテーテル外径下で、カテーテル内径が小となる。
また、上記補強層の厚みが大であることから、本体部の
カテーテル外径と先端部のカテーテル外径との間に比較
的大なる段差を生じ、血管等への挿入を行なうことが困
難となる。また、上記カテーテル１０は、本体部を構成
する内管部１１の上面で、第１ワイヤ層１２および第２
ワイヤ層１３を折り返すことによって形成しているの
で、その全体を連続して形成し、カテーテル用基材を得
ることができない。[0007] Furthermore, since the catheter 10 has a reinforcing layer consisting of two layers, a first wire layer 12 and a second wire layer 13, interposed between the inner tube portion 11 and the outer tube portion 14 that constitute the main body, the thickness of the reinforcing layer is large, and the inner diameter of the catheter is small under a specified outer diameter of the catheter determined by the inner diameter of the insertion path, such as a blood vessel, into which the catheter is inserted.
Furthermore, since the thickness of the reinforcing layer is large, a relatively large difference in level occurs between the outer diameter of the catheter at the main body portion and the outer diameter of the catheter at the tip portion, making it difficult to insert the catheter into a blood vessel, etc. Furthermore, in the catheter 10, the first wire layer 12 and the second wire layer 13 are formed on the upper surface of the inner tube portion 11 that constitutes the main body portion.
Since the wire layer 13 is formed by folding back, it is not possible to form the entire layer continuously to obtain a catheter base material.
【０００８】また、カテーテルにあっては、血管体腔内
への挿入作業性を向上するために、本体部と先端部のね
じり剛性の変化を緩やかなものをして、本体部の回動に
対する先端部の応答性を速くするとともに、本体部に対
する先端部の急な折れ曲がりを防止可能とすることが望
まれる。[0008] In addition, in the case of a catheter, in order to improve the ease of insertion into a blood vessel or body cavity, it is desirable to make the change in torsional rigidity between the main body and the tip portion gradual, thereby making it possible to speed up the response of the tip portion to rotation of the main body portion and to prevent the tip portion from bending suddenly relative to the main body portion.
【０００９】本発明は、本体部と先端部が一体形成さ
れ、ねじり剛性が大きくかつ先端部に柔軟性を有し、本
体部と先端部で外径が略均一化されるとともに、比較的
大なる内径を形成することができ、更に、本体部と先端
部のねじり剛性の変化を緩やかなものとして、本体部の
回動に対する先端部の応答性を速くするとともに、本体
部に対する先端部の急な折れ曲がりを防止することがで
きるカテーテルを提供することを目的をする。[0009] The object of the present invention is to provide a catheter in which the main body and tip are integrally formed, which has high torsional rigidity and flexibility at the tip, which has a substantially uniform outer diameter at the main body and tip, which can form a relatively large inner diameter, and which has a gradual change in torsional rigidity at the main body and tip, which speeds up the response of the tip to rotation of the main body, and which can prevent the tip from bending sharply relative to the main body.
【００１０】[0010]
【課題を解決するための手段】請求項１に記載の本発明
は、基端から先端に至る内管部と該内管部を被覆する外
管部からなるカテーテルであって、該カテーテルは先端
部と本体部を有し、該本体部における内管部と外管部と
の間に一層からなる補強層を介装し、かつ該先端部は上
記補強層を有さず、更に前記補強層は、本体部における
基端側の密に編まれたワイヤ層と、本体部における先端
側の粗に編まれたワイヤ層とからなるようにしたもので
ある。[Means for solving the problem] The present invention as set forth in claim 1 is a catheter comprising an inner tubular portion extending from the base end to the tip and an outer tubular portion covering the inner tubular portion, the catheter having a tip end and a main body portion, a reinforcing layer consisting of one layer interposed between the inner tubular portion and the outer tubular portion in the main body portion, the tip end portion not having the reinforcing layer, and further comprising a densely woven wire layer on the base end side of the main body portion and a loosely woven wire layer on the tip end side of the main body portion.
【００１１】請求項２に記載の本発明は、基端から先端
に至る内管部と該内管部を被覆する外管部からなるカテ
ーテルであって、該カテーテルは先端部と本体部を有
し、該本体部における内管部と外管部との間に一層から
なる補強層を介装し、かつ該先端部は上記補強層を有さ
ず、更に前記補強層は、本体部における基端側の編まれ
たワイヤ層と、本体部における先端側の編まれないワイ
ヤ層とからなるようにしたものである。[0011] The present invention described in claim 2 is a catheter consisting of an inner tubular portion extending from the base end to the tip and an outer tubular portion covering the inner tubular portion, the catheter having a tip end and a main body portion, a reinforcing layer consisting of one layer interposed between the inner tubular portion and the outer tubular portion in the main body portion, the tip end portion does not have the above-mentioned reinforcing layer, and further the reinforcing layer consists of a braided wire layer on the base end side of the main body portion and a non-braided wire layer on the tip end side of the main body portion.
【００１２】請求項３に記載の本発明は、基端から先端
に至る内管部と該内管部を被覆する外管部からなるカテ
ーテルであって、該カテーテルは先端部と本体部を有
し、該本体部における内管部と外管部との間に一層から
なる補強層を介装し、かつ該先端部は上記補強層を有さ
ず、更に前記補強層の先端側の端部は、内管部に固定さ
れているようにしたものである。尚、ここで言う「固
定」は、補強層の先端側の端部を内管部に接着剤により
接着するほか、熱をかけて内管に融着、更には補強層で
あるワイヤ層を内管に埋設することも含めるものとす
る。The present invention as set forth in claim 3 is a catheter comprising an inner tubular section extending from the base end to the tip and an outer tubular section covering the inner tubular section, the catheter having a tip section and a main body section, a reinforcing layer consisting of one layer interposed between the inner tubular section and the outer tubular section in the main body section, the tip section having no reinforcing layer, and further the tip end of the reinforcing layer being fixed to the inner tubular section. Note that "fixing" as used here includes bonding the tip end of the reinforcing layer to the inner tubular section with an adhesive, fusing it to the inner tubular section by applying heat, and even embedding a wire layer as the reinforcing layer in the inner tubular section.
【００１３】[0013]
【作用】本発明によれば、下記〜の作用効果があ
る。
カテーテルは先端部と本体部を有し、該本体部におけ
る内管部と外管部との間に一層からなる補強層を介装
し、かつ該先端部は上記補強層を有していないようにし
たので、本体部と先端部が一体形成され、ねじり剛性が
大きくかつ先端部に柔軟性を有し、本体部と先端部で外
径が均一化されるとともに比較的大なる内径を形成する
ことが可能となる。The present invention has the following effects: The catheter has a tip portion and a main body portion, and a single-layer reinforcing layer is interposed between the inner and outer tubular portions of the main body portion, while the tip portion does not have the reinforcing layer. This allows the main body and the tip portion to be integrally formed, resulting in high torsional rigidity and flexibility at the tip portion, and allows the main body and the tip portion to have a uniform outer diameter and a relatively large inner diameter.
【００１４】補強層を密と粗の２段階、或いは編まれ
たものと編まれないものとの２段階にて構成するように
したので、本体部と先端部のねじり剛性の変化を緩やか
なものとして本体部の回動に対する先端部の応答性を速
くするとともに、本体部に対する先端部の急な折れ曲が
りを防止することが可能となる。[0014] The reinforcing layer is constructed in two stages, dense and loose, or woven and non-woven, so that the change in torsional rigidity between the main body and the tip is gradual, making it possible to speed up the response of the tip to the rotation of the main body and to prevent the tip from bending suddenly relative to the main body.
【００１５】補強層の先端側の端部が、内管部に固定
されてなるものとすることにより、製造段階における補
強層端部の内管部からの剥離を防止することが可能とな
る。[0015] By fixing the end portion of the reinforcing layer on the tip side to the inner tube portion, it is possible to prevent the end portion of the reinforcing layer from peeling off from the inner tube portion during the manufacturing stage.
【００１６】[0016]
【実施例】図４（Ａ）は本発明の第１実施例に係るカテ
ーテル３０を示す平面図、図４（Ｂ）は同カテーテル３
０の外管部の一部を剥離して示す平面図、図５（Ａ）お
よび（Ｂ）は同カテーテル３０の製造過程を示す平面図
である。4A is a plan view showing a catheter 30 according to a first embodiment of the present invention, and FIG. 4B is a plan view showing the same catheter 30.
5A and 5B are plan views showing the manufacturing process of the catheter 30. FIG.
【００１７】カテーテル３０は、図４（Ａ）および
（Ｂ）に示すように、長さＬ1 のねじり剛性が比較的小
なる先端部３１と、長さＬ2 のねじり剛性が比較的小な
る先端部３２とが軸方向に一体形成されている。上記カ
テーテル３０にあっては、本体部３１における可撓性の
内管部３３と可撓性の外管部３４との間に、一層からな
る補強層３５を介装し、先端部３２を内管部３３と外管
部３４の一体化状態によって形成している。ここで、補
強層３５は、本体部３１における反先端部３２側（基端
側）の密に編まれたワイヤ層３５Ａと、本体部３１にお
ける先端部３２側の粗に編まれたワイヤ層３５Ｂとから
形成されている。ワイヤ層３５Ｂの先端部３２側の端部
は、内管部３３に接着されている。4A and 4B, the catheter 30 comprises a distal end portion 31 having a length L1 and a relatively low torsional rigidity, and a distal end portion 32 having a length L2 and a relatively low torsional rigidity, which are integrally formed in the axial direction. In the catheter 30, a single-layer reinforcing layer 35 is interposed between a flexible inner tube portion 33 and a flexible outer tube portion 34 of the main body portion 31, and the distal end portion 32 is formed by integrating the inner tube portion 33 and the outer tube portion 34. The reinforcing layer 35 is formed of a densely woven wire layer 35A on the side of the main body portion 31 opposite the distal end portion 32 (the base end side), and a loosely woven wire layer 35B on the distal end portion 32 side of the main body portion 31. The end of the wire layer 35B on the distal end portion 32 side is bonded to the inner tube portion 33.
【００１８】上記カテーテル３０によれば、前記カテー
テル２０と同様に、本体部３１と先端部３２とが一体形
成され、ねじり剛性が大きくかつ先端部３２に柔軟性を
有し、本体部３１と先端部３２で外径が略均一化される
とともに、比較的大なる内径を形成することが可能とな
る。特に、上記カテーテル３０にあっては、本体部３１
における反先端部３２側（基端側）の密に編まれたワイ
ヤ層３５Ａと、本体部３１における先端部３２側の粗に
編まれたワイヤ層３５Ｂとによって、補強層３５を形成
したので、本体部３１と先端部３２のねじり剛性の変化
をゆるやかなものとして、本体部３１の回動に対する先
端部３２の応答性を速くするとともに、本体部３１に対
する先端部３２の急な折れ曲がりを防止し、折れ曲がり
に基づくカテーテル内部空間の閉塞発生を防止すること
が可能となる。また、上記カテーテル３０にあっては、
ワイヤ層３５Ｂの先端部３２側の端部を内管部３３に接
着したから、製造段階におけるワイヤ層３５Ｂの内管部
３３からの剥離を防止することが可能となる。According to the catheter 30, similar to the catheter 20, the main body 31 and the tip 32 are integrally formed, the torsional rigidity is high, and the tip 32 has flexibility. The outer diameters of the main body 31 and the tip 32 are made substantially uniform, and it is possible to form a relatively large inner diameter. In particular, in the catheter 30, the main body 31
The reinforcing layer 35 is formed by a densely woven wire layer 35A on the side opposite the tip portion 32 (the base end side) of the catheter 30 and a loosely woven wire layer 35B on the tip portion 32 side of the main body 31, so that the change in torsional rigidity between the main body 31 and the tip portion 32 is gradual, making it possible to speed up the response of the tip portion 32 to the rotation of the main body 31 and to prevent sudden bending of the tip portion 32 relative to the main body 31, thereby preventing blockage of the catheter interior space due to bending.
Since the end of the wire layer 35B on the tip portion 32 side is bonded to the inner tube portion 33, it is possible to prevent the wire layer 35B from peeling off from the inner tube portion 33 during the manufacturing process.
【００１９】次に、上記カテーテル３０の製造方法につ
いて説明する。まず、可撓性の内管部３３が押出し成形
される。次に、内管部３３の上面に、図５（Ａ）に示す
ように補強層３５を連続的に一層形成する。ここで、補
強層３５は、網の目が密（例えばピッチＰ1 ＝ 1mm）な
ワイヤ層３５Ａと、網の目が粗（例えばピッチＰ2 ＝10
mm）なワイヤ層３５Ｂとが交互に形成される。次に除去
すべき一定区間のワイヤ層３５Ｂの端部を内管部３３に
接着剤で接着した後上記ワイヤ層３５Ｂの略中央部の一
部を図５（Ｂ）に示すように除去する。次に、内管部３
３、ワイヤ層３５Ａ、３５Ｂの上面に、可撓性の外管部
３４を押出し成形する。次にワイヤ層３５Ａのある部分
の略中間部Ｘ1 と、補強層３５のない部分の略中間部Ｘ
2 で切断し、ワイヤ層３５Ａ、３５Ｂのある部分を本体
部３１とし、補強層３５のない部分を先端部３２とする
カテーテル３０を得る。ここで、本実施例にあっては、
「補強層３５のある部分の中間部と補強層３５のない部
分の中間部を切断する」という従来全く見られなかった
技術的事項を具備したから、補強層３５のある部分と補
強層３５のない部分の境界部で切断する等に比して、補
強層３５をカテーテル３０の 2本分連続形成でき、生産
性を向上できるという格別のメリットがある。すなわ
ち、上記製造方法によれば、カテーテル３０を高い生産
性にて連続して形成可能となる。Next, a method for manufacturing the catheter 30 will be described. First, the flexible inner tube portion 33 is extrusion-molded. Next, a reinforcing layer 35 is continuously formed on the upper surface of the inner tube portion 33 as shown in FIG. 5(A). Here, the reinforcing layer 35 is made up of a wire layer 35A having a fine mesh (for example, a pitch P1 = 1 mm) and a wire layer 35B having a coarse mesh (for example, a pitch P2 = 10 mm).
Next, the end of the wire layer 35B of a certain section to be removed is adhered to the inner pipe portion 33 with an adhesive, and then a part of the approximate center of the wire layer 35B is removed as shown in FIG.
3. The flexible outer tube portion 34 is extruded on the upper surface of the wire layers 35A and 35B. Next, the outer tube portion 34 is extruded at a substantially intermediate portion X1 where the wire layer 35A is present and at a substantially intermediate portion X2 where the reinforcing layer 35 is not present.
2 , to obtain a catheter 30 having a main body 31 as the portion with the wire layers 35A and 35B and a tip portion 32 as the portion without the reinforcing layer 35.
Because the method employs a technical feature never before seen before, namely, "cutting the middle part of the portion with the reinforcing layer 35 from the middle part of the portion without the reinforcing layer 35," it is possible to continuously form the reinforcing layer 35 for two catheters 30, which has the distinct advantage of improving productivity, compared to cutting at the boundary between the portion with the reinforcing layer 35 and the portion without the reinforcing layer 35. In other words, the above manufacturing method enables the continuous formation of catheters 30 with high productivity.
【００２０】図６（Ａ）は本発明の第２実施例に係るカ
テーテル４０を示す平面図、図６（Ｂ）は同カテーテル
４０の外管部の一部を剥離して示す平面図、図７（Ａ）
および（Ｂ）は同カテーテル４０の製造過程を示す平面
図である。FIG. 6(A) is a plan view showing a catheter 40 according to a second embodiment of the present invention, FIG. 6(B) is a plan view showing the catheter 40 with a portion of the outer tube portion thereof peeled off, and FIG.
10A and 10B are plan views showing the manufacturing process of the catheter 40.
【００２１】カテーテル４０は、図６（Ａ）および
（Ｂ）に示すように、長さＬ1 のねじり剛性が比較的大
なる本体部４１と、長さＬ2 のねじり剛性が比較的小な
る先端部４２とが軸方向に一体形成されている。上記カ
テーテル４０にあっては、本体部４１における可撓性の
内管部４３と可撓性の外管部４４との間に、一層からな
る補強層４５を介装し、先端部４２を内管部４３に外管
部４４の一体化状態によって形成している。ここで、補
強層４５は、本体部４１における反先端部４２側（基端
側）の編まれたワイヤ層４５Ａと、本体部４１における
先端部４２側の編まれないワイヤ層４５Ｂとから形成さ
れている。ワイヤ層４５Ｂの先端部４２側の端部は、内
管部４３に接着されている。編まれないワイヤ層４５Ｂ
は、図７の通りカテーテル軸と平行に設けられている。As shown in Figures 6A and 6B, the catheter 40 is formed integrally in the axial direction with a main body 41 having a length L1 and a relatively high torsional rigidity and a distal end 42 having a length L2 and a relatively low torsional rigidity. In the catheter 40, a single layer of reinforcing layer 45 is interposed between a flexible inner tube 43 and a flexible outer tube 44 of the main body 41, and the distal end 42 is formed by integrating the inner tube 43 with the outer tube 44. The reinforcing layer 45 is formed from a braided wire layer 45A on the side of the main body 41 opposite the distal end 42 (the base end side), and an unbraided wire layer 45B on the distal end 42 side of the main body 41. The end of the wire layer 45B on the distal end 42 side is bonded to the inner tube 43. The unbraided wire layer 45B
is provided parallel to the catheter axis as shown in FIG.
【００２２】上記カテーテル４０によれば、前記カテー
テル２０と同様に、本体部４１と先端部４２が一体形成
され、ねじり剛性が大きくかつ先端部４２に柔軟性を有
し、本体部４１と先端部４２で外径が略均一化されると
ともに、比較的大なる内径を形成することが可能とな
る。また、上記カテーテル４０は、前記カテーテル３０
と同様に、本体部４１と先端部４２のねじり剛性の変化
をゆるやかなものとして本体部４１の回動に対する先端
部４２の応答性を速くするとともに、本体部４１に対す
る先端部４２の急な折れ曲がりを防止可能となる。ま
た、上記カテーテル４０にあっては、ワイヤ層４５Ｂの
先端部４２側の端部を内管部４３に接着したから、製造
段階におけるワイヤ層４５Ｂの端部の内管部４３からの
剥離を防止することが可能となる。According to the catheter 40, similar to the catheter 20, the main body 41 and the tip portion 42 are integrally formed, the torsional rigidity is large, and the tip portion 42 has flexibility, and the outer diameters of the main body 41 and the tip portion 42 are made substantially uniform, and it is possible to form a relatively large inner diameter.
Similarly, the change in torsional rigidity between the main body portion 41 and the tip portion 42 is made gradual, which makes it possible to speed up the response of the tip portion 42 to the rotation of the main body portion 41 and to prevent the tip portion 42 from bending suddenly relative to the main body portion 41. Furthermore, in the catheter 40, the end of the wire layer 45B on the tip portion 42 side is bonded to the inner tubular portion 43, which makes it possible to prevent the end of the wire layer 45B from peeling off from the inner tubular portion 43 during manufacturing.
【００２３】次に、上記カテーテル４０の製造方法につ
いて説明する。まず、可撓性の内管部４３が押出し成形
される。次に、内管部４３上に、図７（Ａ）に示すよう
に、補強層４５を連続的に一層形成する。ここで、補強
層４５は編まれたワイヤ層４５Ａと、編まれない補強層
４５Ｂとが交互に形成される。次に、除去すべき一定区
間のワイヤ層４５Ｂの端部を内管部４３に接着剤で接着
した後上記ワイヤ層４５Ｂの略中央部の一部を図７
（Ｂ）に示すように除去する。次に、内管部４３、ワイ
ヤ層４５Ａ、４５Ｂの上面に外管部４４を押出し成形す
る。次に、ワイヤ層４５Ａのある部分の略中間部Ｘ1
と、補強層４５のない部分の略中間部Ｘ2 で切断し、ワ
イヤ層４５Ａ、４５Ｂのある部分を本体部４１とし、補
強層４５のない部分を先端部４２とするカテーテル４０
を得る。ここで、本実施例にあっては、「補強層４５の
ある部分の中間部と補強層４５のない部分の中間部を切
断する」という従来全く見られなかった技術的事項を具
備したから、補強層４５のある部分と補強層４５のない
部分の境界部で切断する等に比して、補強層４５をカテ
ーテル４０の 2本分連続形成でき、生産性を向上できる
という格別のメリットがある。すなわち、上記製造方法
によれば、カテーテル４０を高い生産性にて連続して形
成可能となる。Next, a method for manufacturing the catheter 40 will be described. First, the flexible inner tube 43 is extrusion-molded. Next, as shown in Figure 7(A), a reinforcing layer 45 is continuously formed on the inner tube 43. Here, the reinforcing layer 45 is formed by alternating braided wire layers 45A and non-braided reinforcing layers 45B. Next, the end of a certain section of the wire layer 45B to be removed is adhered to the inner tube 43 with an adhesive, and then a portion of the approximate center of the wire layer 45B is removed as shown in Figure 7.
Next, the outer tube portion 44 is extruded onto the upper surfaces of the inner tube portion 43 and the wire layers 45A and 45B. Next, the wire layer 45A is removed from the approximately intermediate portion X 1
The catheter 40 is cut at the approximate middle portion X2 of the portion without the reinforcing layer 45, and the portion with the wire layers 45A and 45B is made into the main body portion 41, and the portion without the reinforcing layer 45 is made into the tip portion 42.
Here, this embodiment employs a technical feature never before seen before, namely, "cutting the middle portion of the portion with the reinforcing layer 45 from the middle portion of the portion without the reinforcing layer 45." This has the distinct advantage of enabling the reinforcing layer 45 to be continuously formed for two catheters 40, thereby improving productivity, compared to cutting at the boundary between the portion with the reinforcing layer 45 and the portion without the reinforcing layer 45. In other words, the above manufacturing method enables the catheter 40 to be continuously formed with high productivity.
【００２４】[0024]
【発明の効果】以上のように本発明によれば、本体部と
先端部が一体形成され、ねじり剛性が大きくかつ先端部
に柔軟性を有し、本体部と先端部で外径が略均一化され
るとともに、比較的大なる内径を形成することができ、
更に、本体部と先端部のねじり剛性の変化を緩やかなも
のとして、本体部の回動に対する先端部の応答性を速く
するとともに、本体部に対する先端部の急な折れ曲がり
を防止することができるカテーテルを提供することがで
きる。As described above, according to the present invention, the main body and tip are integrally formed, the torsional rigidity is high, the tip has flexibility, the outer diameters of the main body and tip are substantially uniform, and a relatively large inner diameter can be formed.
Furthermore, it is possible to provide a catheter in which the torsional rigidity of the main body and tip portion changes gradually, thereby increasing the response of the tip portion to rotation of the main body portion and preventing the tip portion from bending suddenly relative to the main body portion.
【図１】図１は一般のカテーテルを示す平面図である。FIG. 1 is a plan view showing a typical catheter.
【図２】図２は従来例に係るカテーテルを示す一部破断
図である。FIG. 2 is a partially cutaway view showing a conventional catheter.
【図３】図３は他の従来例に係るカテーテルを示す一部
破断図である。FIG. 3 is a partially cutaway view showing another conventional catheter.
【図４】図４（Ａ）は本発明の第１実施例に係るカテー
テルを示す平面図、図４（Ｂ）は同カテーテルの外管部
の一部を剥離して示す平面図である。4A is a plan view showing a catheter according to a first embodiment of the present invention, and FIG. 4B is a plan view showing the catheter with a portion of its outer tube portion peeled off.
【図５】図５（Ａ）および（Ｂ）は同カテーテルの製造
過程を示す平面図である。5A and 5B are plan views showing the manufacturing process of the catheter.
【図６】図６（Ａ）は本発明の第２実施例に係るカテー
テルを示す平面図、図６（Ｂ）は同カテーテルの外管部
の一部を剥離して示す平面図である。6A is a plan view showing a catheter according to a second embodiment of the present invention, and FIG. 6B is a plan view showing the catheter with a portion of its outer tube portion peeled off.
【図７】図７（Ａ）および（Ｂ）は同カテーテルの製造
過程を示す平面図である。7A and 7B are plan views showing the manufacturing process of the catheter.
３０、４０ カテーテル ３１、４１ 本体部 ３２、４２ 先端部 ３３、４３ 内管部 ３４、４４ 外管部 ３５、４５ 補強層 ３５Ａ、３５Ｂ、４５Ａ、４５Ｂ ワイヤ層 30, 40 Catheter 31, 41 Main body 32, 42 Tip 33, 43 Inner tube 34, 44 Outer tube 35, 45 Reinforcement layer 35A, 35B, 45A, 45B Wire layer
Claims (3)
被覆する外管部からなるカテーテルであって、該カテー
テルは先端部と本体部を有し、該本体部における内管部
と外管部との間に一層からなる補強層を介装し、かつ該
先端部は上記補強層を有さず、更に前記補強層は、本体
部における基端側の密に編まれたワイヤ層と、本体部に
おける先端側の粗に編まれたワイヤ層とからなることを
特徴とするカテーテル。[Claim 1] A catheter comprising an inner tubular portion extending from the base end to the tip and an outer tubular portion covering the inner tubular portion, the catheter having a tip end and a main body portion, a reinforcing layer consisting of one layer interposed between the inner tubular portion and the outer tubular portion in the main body portion, the tip end not having the reinforcing layer, and further characterized in that the reinforcing layer comprises a densely woven wire layer on the base end side of the main body portion and a loosely woven wire layer on the tip end side of the main body portion.
被覆する外管部からなるカテーテルであって、該カテー
テルは先端部と本体部を有し、該本体部における内管部
と外管部との間に一層からなる補強層を介装し、かつ該
先端部は上記補強層を有さず、更に前記補強層は、本体
部における基端側の編まれたワイヤ層と、本体部におけ
る先端側の編まれないワイヤ層とからなることを特徴と
するカテーテル。[Claim 2] A catheter comprising an inner tubular portion extending from the base end to the tip and an outer tubular portion covering the inner tubular portion, the catheter having a tip end and a main body portion, a reinforcing layer consisting of one layer interposed between the inner tubular portion and the outer tubular portion in the main body portion, the tip end not having the reinforcing layer, and further characterized in that the reinforcing layer comprises a braided wire layer on the base end side of the main body portion and a non-braided wire layer on the tip end side of the main body portion.
被覆する外管部からなるカテーテルであって、該カテー
テルは先端部と本体部を有し、該本体部における内管部
と外管部との間に一層からなる補強層を介装し、かつ該
先端部は上記補強層を有さず、更に前記補強層の先端側
の端部は、内管部に固定されていることを特徴とするカ
テーテル。[Claim 3] A catheter comprising an inner tubular portion extending from the base end to the tip and an outer tubular portion covering the inner tubular portion, the catheter having a tip portion and a main body portion, a reinforcing layer consisting of one layer interposed between the inner tubular portion and the outer tubular portion in the main body portion, the tip portion not having the reinforcing layer, and further characterized in that the tip side end of the reinforcing layer is fixed to the inner tubular portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-236940A JPH0626574B2 (en) | 1982-11-01 | catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-236940A JPH0626574B2 (en) | 1982-11-01 | catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05220225A JPH05220225A (en) | 1993-08-31 |
| JPH0626574B2 true JPH0626574B2 (en) | 1994-04-13 |
Family
ID=17007998
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3-236940A Expired - Lifetime JPH0626574B2 (en) | 1982-11-01 | catheter | |
| JP23694082A Pending JPH0626574B1 (en) | 1982-11-01 | 1991-08-26 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23694082A Pending JPH0626574B1 (en) | 1982-11-01 | 1991-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPH0626574B2 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5658264A (en) * | 1994-11-10 | 1997-08-19 | Target Therapeutics, Inc. | High performance spiral-wound catheter |
| US5891112A (en) * | 1995-04-28 | 1999-04-06 | Target Therapeutics, Inc. | High performance superelastic alloy braid reinforced catheter |
| EP0782463B1 (en) * | 1995-04-28 | 2000-03-01 | Target Therapeutics, Inc. | High performance braided catheter |
| JPH0970321A (en) * | 1995-09-06 | 1997-03-18 | K M Japan Kk | Dressing table with cooler |
| US5927345A (en) * | 1996-04-30 | 1999-07-27 | Target Therapeutics, Inc. | Super-elastic alloy braid structure |
| US5782811A (en) | 1996-05-30 | 1998-07-21 | Target Therapeutics, Inc. | Kink-resistant braided catheter with distal side holes |
| US5971975A (en) * | 1996-10-09 | 1999-10-26 | Target Therapeutics, Inc. | Guide catheter with enhanced guidewire tracking |
| US6159187A (en) * | 1996-12-06 | 2000-12-12 | Target Therapeutics, Inc. | Reinforced catheter with a formable distal tip |
| US5951539A (en) * | 1997-06-10 | 1999-09-14 | Target Therpeutics, Inc. | Optimized high performance multiple coil spiral-wound vascular catheter |
| US6152912A (en) * | 1997-06-10 | 2000-11-28 | Target Therapeutics, Inc. | Optimized high performance spiral-wound vascular catheter |
| US5891114A (en) * | 1997-09-30 | 1999-04-06 | Target Therapeutics, Inc. | Soft-tip high performance braided catheter |
| US7815626B1 (en) * | 1998-06-12 | 2010-10-19 | Target Therapeutics, Inc. | Catheter with knit section |
| US6689120B1 (en) | 1999-08-06 | 2004-02-10 | Boston Scientific Scimed, Inc. | Reduced profile delivery system |
| US7815599B2 (en) | 2004-12-10 | 2010-10-19 | Boston Scientific Scimed, Inc. | Catheter having an ultra soft tip and methods for making the same |
| JP2007229244A (en) * | 2006-03-01 | 2007-09-13 | Fukuda Denshi Co Ltd | Catheter tube and control method of catheter tube manufacturing apparatus |
| US10821264B1 (en) | 2019-12-10 | 2020-11-03 | Inneuroco, Inc. | Mixed coil catheter and process for making same |
-
1982
- 1982-11-01 JP JP3-236940A patent/JPH0626574B2/en not_active Expired - Lifetime
-
1991
- 1991-08-26 JP JP23694082A patent/JPH0626574B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0626574B1 (en) | 1994-04-13 |
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