JPH05220225A - Catheter - Google Patents

Catheter

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Publication number
JPH05220225A
JPH05220225A JP23694091A JP23694091A JPH05220225A JP H05220225 A JPH05220225 A JP H05220225A JP 23694091 A JP23694091 A JP 23694091A JP 23694091 A JP23694091 A JP 23694091A JP H05220225 A JPH05220225 A JP H05220225A
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JP
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Patent type
Prior art keywords
portion
catheter
tip
reinforcing layer
main body
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.)
Pending
Application number
JP23694091A
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Japanese (ja)
Inventor
Atsushi Matsumoto
Tatsuo Suzuki
淳 松本
龍夫 鈴木
Original Assignee
Terumo Corp
テルモ株式会社
Priority date (The priority date 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 date listed.)
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Abstract

PURPOSE: To provide a catheter gradually changing the torsional rigidity of a main body section and a tip section, accelerating the responsiveness of the tip section against the rotation of the main body section, and capable of preventing the abrupt bending of the tip section against the main body section.
CONSTITUTION: A catheter 30 is constituted of an inner pipe section 33 from a base end to the tip and an outer pipe section 34 covering the inner pipe section 33, the catheter 30 has a tip section 32 and a main body section 31, a single-layer reinforcing layer 35 is inserted between the inner pipe section 33 and the outer pipe section 34 of the main body section 31, the tip section 32 has no reinforcing layer 35, and the reinforcing layer 35 is constituted of a wire layer 35A lightly knitted on the base end side of the main body section 31 and a wire layer 35B coarsely knitted on the tip side of the main body section 31.
COPYRIGHT: (C)1993,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明はカテーテルに関する。 The present invention relates to a catheter.

【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。 The catheter 1 shown in Prior Art FIG. 1, for example, is guided to the guide wire or the like, is inserted into a blood vessel or the like in a body cavity, and is capable of reaching the site of interest while being controlled in the direction of the tip .

【0003】そこで、このカテーテル1には、本体部2 [0003] Thus, in this catheter 1, the main body part 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。 Twisting the base to be able to orient the tip portion 3 is required to have a large becomes torsional rigidity. 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。 Further, it is possible to provide the insertion easy shape to a target site easily to the tip 3, damage to the inner wall of the blood vessel or the like is easily deformed is inserted at the tip 3 along the insertion path change such as a blood vessel so as not to give, flexibility is required to the tip 3.

【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。 [0004] Figure 2 is flexible at the distal end, and is a partially cutaway view of a conventional catheter 4 consisting a large becomes torsional rigidity. カテーテル4は、可撓性の内管部5 The catheter 4, the flexible inner tube portion 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。 When, to form a body portion 8 large consisting of torsional stiffness by a wire layer 7 interposed between the flexible outer tube portion 6. 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。 In addition, the catheter 4 is connected to a relatively soft tip 9 to the end that partially removed outer tube portion 6 of the body portion 8.

【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。 [0005] Figure 3 is flexible at the distal end, and is a partially cutaway view showing another catheter 10 prior comprising a large becomes torsional rigidity. 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。 The catheter 10 is formed a first wire layer 12 from the proximal end of the inner flexible tube portion 11 to the tip before, after formation of the second wire layer 13 again to the proximal end is folded back from the tip front, inner It is covered with flexible outer tube portion 14 on the upper surface of the tube portion 11 and both wires 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。 [SUMMARY OF THE INVENTION] However, in the above catheter 4, caused a step in the connection portion between the body portion 8 and the distal end portion 9, it is difficult to smoothly perform the insertion into the blood vessel or the like, there is a possibility that cause blood clots. 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。 Further, the connection failure between the main body portion 8 and the distal end portion 9, there is a fear causing a disengagement therebetween.

【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。 Further, the catheter 10 is provided between the inner pipe part 11 and the outer tube portion 14 constituting the body portion, the reinforcing layer is interposed consisting of a first wire layer 12 and the second wire layer 13 of the bilayer since it was, the thickness of the reinforcing layer becomes large, the catheter is in a predetermined outer catheter 径下 defined by insertion path inside diameter such as blood vessels to be inserted, the catheter inner diameter becomes small.
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。 Further, since the thickness of the reinforcing layer is large, resulting a relatively large step between the catheter outside diameter of the catheter outer diameter and the distal end portion of the main body portion, and difficult to perform insertion into a blood vessel or the like Become. 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 Also, the catheter 10, the upper surface of the inner pipe portion 11 constituting the body portion, the first wire layer 12 and the second
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。 Since the forming by folding the wire layer 13, and formed continuously in its entirety, it is not possible 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] Further, in the catheter, in order to improve the insertion operability into the vessel body cavity, the change in the torsional rigidity of the main body portion and a distal portion with a gentle, tip relative rotation of the body portion with a faster response of the parts, it is desired to enable preventing sudden bending of the tip portion relative to the 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 present invention includes a main body portion and the tip portion are integrally formed, has flexibility in the torsional rigidity is large and the tip portion, with the outer diameter is substantially uniform in the body portion and the distal end portion, a relatively large becomes possible to form an inner diameter, further, the change in the torsional rigidity of the main body portion and the distal end portion as gradual, with a faster response of the tip relative to the rotation of the main body, suddenly the tip relative to the body portion the object of the invention to provide a catheter capable of preventing such bending a.

【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。 SUMMARY OF THE INVENTION The present invention as set forth in claim 1 is a catheter consisting of an outer tube portion that covers the inner tube portion and the inner tube portion extending from the proximal end to the distal end, the catheter tip has a parts and body part, interposed a reinforcing layer composed of one between the inner tube portion and the outer tube portion of the body portion, and the tip portion has no the reinforcing layer, further wherein the reinforcing layer it is obtained as composed of a wire layer woven tightly the proximal side of the main body portion, a wire layer woven coarse tip 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 the catheter consisting of an outer tube portion that covers the inner tube portion and the inner tube portion extending from the proximal end to the distal end, the catheter have a tip portion and a body portion and, interposed reinforcing layer composed of one between the inner tube portion and the outer tube portion of the body portion, and the tip portion has no the reinforcing layer, the further the reinforcing layer, base of the main body a wire layer braided end side, in which was set to a wire layer is not braided distal end side of the main body.

【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。 [0012] The present invention is defined in claim 3, a catheter consisting of an outer tube portion that covers the inner tube portion and the inner tube portion extending from the proximal end to the distal end, the catheter have a tip portion and a body portion and, interposed reinforcing layer composed of one between the inner tube portion and the outer tube portion of the body portion, and the tip portion has no the reinforcing layer, further the end portion of the front end side of the reinforcing layer it is obtained as being secured to the inner tubular part. 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。 Here, the term "fixed", in addition to adhering by an adhesive to the inner tubular part the ends of the distal side of the reinforcing layer, fused to the inner tube by applying heat, even the inner wire layer is reinforced layer also included be embedded in the tube.

【0013】 [0013]

【作用】本発明によれば、下記〜の作用効果がある。 According to the present invention, there is effect of the following ~. 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 catheter has a distal portion and a body portion, interposed reinforcing layer composed of one between the inner tube portion and the outer tube portion of the body portion, and such that the tip portion does not have the above reinforcing layer since the main body portion and the tip portion are integrally formed, has flexibility in the torsional rigidity is large and the tip portion to form a relatively large inner diameter with an outer diameter is made uniform by the main body portion and a distal portion it becomes possible.

【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] 2-step dense and coarse reinforcing layer, or because the the to constitute at two stages shall not woven as braided, gentle changes in the torsional rigidity of the main body portion and the distal portion as well as increase the response of the tip relative to the rotation of the main body portion, it is possible to prevent the sudden bending of the tip portion relative to the body portion.

【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。 The end of the tip side of the reinforcing layer, by shall become fixed to the inner tubular part, it is possible to prevent peeling from the inner tube portion of the reinforcing layer end in 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 DETAILED DESCRIPTION FIG. 4 (A) a plan view showing a catheter 30 according to the first embodiment of the present invention, FIG. 4 (B) the catheter 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。 Plan view showing peeling a portion of the outer tube portion of 0, FIG. 5 (A) and (B) is a plan view showing a manufacturing process of the catheter 30.

【0017】カテーテル30は、図4(A)および(B)に示すように、長さL 1のねじり剛性が比較的小なる先端部31と、長さL 2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。 The catheter 30, as shown in FIG. 4 (A) and (B), the distal end portion 31 the torsional rigidity is relatively small length L 1, the torsional rigidity is relatively small length L 2 It is integrally formed on the distal end portion 32 axial direction. 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。 The above In the catheter 30, between the outer tube portion 34 of the inner tubular part 33 and the flexibility of the flexible of the main body 31, interposed reinforcing layer 35 composed of one, inner tip portion 32 It is formed by the structural integrity of the tube portion 33 and the outer tube portion 34. 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。 Here, the reinforcing layer 35, a wire layer 35A woven tightly anti tip 32 side of the main body portion 31 (proximal end side), a wire layer 35B woven into coarse tip 32 side of the main body portion 31 It is formed from. 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。 End of the tip portion 32 side of the wire layer 35B is adhered to the inner tubular part 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。 According to the catheter 30, similar to the catheter 20, is formed with the main body portion 31 and the distal end portion 32 is integrally comprises a flexible torsional rigidity is large and the tip portion 32, body portion 31 and the distal end together with the outer diameter is substantially uniform in part 32, it is possible to form a relatively large inner diameter. 特に、上記カテーテル30にあっては、本体部31 In particular, in the above catheter 30, the main body portion 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。 A wire layer 35A woven tightly anti tip 32 side (base end side) in the, by a wire layer 35B woven into coarse tip 32 side of the main body 31, so to form a reinforcing layer 35, the change in the torsional rigidity of the main body portion 31 and the distal end portion 32 as being loose, the body portion 31 with a faster response of the tip portion 32 for rotation of, and prevent sudden bending of the tip 32 relative to the body portion 31 , it is possible to prevent clogging occurrence of the catheter inner space based on bending. また、上記カテーテル30にあっては、 Further, in the above catheter 30,
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。 Because adhered to the inner tubular part 33 of the end portion of the distal end portion 32 side of the wire layer 35B, it is possible to prevent peeling from the inner tube portion 33 of the wire layer 35B in the manufacturing stage.

【0019】次に、上記カテーテル30の製造方法について説明する。 [0019] Next, a method for manufacturing of the catheter 30. まず、可撓性の内管部33が押出し成形される。 First, flexibility of the inner tubular part 33 is extruded. 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。 Next, the upper surface of the inner tube portion 33, continuously further forming the reinforcing layer 35 as shown in FIG. 5 (A). ここで、補強層35は、網の目が密(例えばピッチP 1 = 1mm)なワイヤ層35Aと、網の目が粗(例えばピッチP 2 =10 Here, the reinforcing layer 35 has a mesh of a net is dense (e.g. pitch P 1 = 1 mm) wire layers 35A, mesh of a net coarse (e.g. pitch P 2 = 10
mm)なワイヤ層35Bとが交互に形成される。 mm) and wire layer 35B are alternately formed. 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。 Then removed as shown a portion of a substantially central portion of the wire layer 35B was adhered with an adhesive end of the fixed section of the wire layer 35B to be removed into the inner tube portion 33 in FIG. 5 (B). 次に、内管部3 Next, the inner tubular part 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。 3, the wire layer 35A, the upper surface of 35B, extruding a flexible outer tube portion 34. 次にワイヤ層35Aのある部分の略中間部X 1と、補強層35のない部分の略中間部X Then a substantially intermediate portion X 1 of the portion of the wire layer 35A, a substantially intermediate portion X of the portion without the reinforcing layer 35
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。 Cut with 2, wire layers 35A, a portion of the 35B and the main body portion 31, to obtain a catheter 30 to the distal end portion 32 of the portion without the reinforcing layer 35. ここで、本実施例にあっては、 Here, in the present embodiment,
「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。 Because equipped with a conventional totally seen not technical matters of "cutting the middle portion of the intermediate portion having no reinforcing layer 35 portion of the portion of the reinforcing layer 35 ', the parts and the reinforcing layer 35 with reinforcement layer 35 compared to the like for cutting the boundary portion of the portion without the reinforcing layer 35 can two pins successive formation of the catheter 30, there is a special advantage that the productivity can be improved. 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。 That is, according to the above manufacturing method, it is possible continuously formed catheter 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) [0020] FIG 6 (A) is a plan view showing a catheter 40 according to a second embodiment of the present invention and FIG. 6 (B) a plan view showing a peeled part of the outer tube portion of the catheter 40, FIG. 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。 And (B) is a plan view showing a 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L 1のねじり剛性が比較的大なる本体部41と、長さL 2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。 The catheter 40, as shown in FIG. 6 (A) and (B), the main body portion 41 torsional rigidity is relatively large length L 1, the torsional rigidity is relatively small length L 2 It is integrally formed on the distal end portion 42 axial direction. 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。 The above In the catheter 40, between the outer tube portion 44 and the inner tube portion 43 flexible in flexibility at the body portion 41, interposed reinforcing layer 45 composed of one, inner tip portion 42 It is formed by the structural integrity of the outer tube portion 44 on the pipe portion 43. 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。 Here, the reinforcing layer 45 is formed from a wire layer 45A which braided anti tip 42 side of the main body portion 41 (proximal end side), and the wire layer 45B is not braided distal portion 42 side of the main body portion 41 ing. 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。 End of the tip portion 42 side of the wire layer 45B is adhered to the inner tubular part 43. 編まれないワイヤ層45B Not woven wire layer 45B
は、図7の通りカテーテル軸と平行に設けられている。 It is provided parallel to the street catheter shaft of Figure 7.

【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。 According to the catheter 40, similar to the catheter 20, the body portion 41 and the distal end portion 42 is integrally formed, has flexibility in the torsional rigidity is large and the tip portion 42, body portion 41 and the distal portion together with the outer diameter is substantially uniform at 42, it is possible to form a relatively large inner diameter. また、上記カテーテル40は、前記カテーテル30 Also, the catheter 40, the catheter 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。 Similarly, with faster response of the tip 42 relative to the rotation of the main body 41 changes in the torsional rigidity of the main body portion 41 and the distal end portion 42 as a gradual, abrupt bending of the tip 42 with respect to the main body portion 41 and the It becomes possible to prevent. 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。 Further, in the above catheter 40, since adhered to the inner tubular part 43 of the end portion of the distal end portion 42 side of the wire layer 45B, preventing separation from the inner tube portion 43 of the end portion of the wire layer 45B in the manufacturing stage it is possible to become.

【0023】次に、上記カテーテル40の製造方法について説明する。 Next, a method for manufacturing of the catheter 40. まず、可撓性の内管部43が押出し成形される。 First, flexibility of the inner tubular part 43 is extruded. 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。 Next, on the inner tubular part 43, as shown in FIG. 7 (A), continuously further forming the reinforcing layer 45. 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。 Here, the reinforcing layer 45 and the wire layer 45A woven, not knitted reinforcing layer 45B are formed alternately. 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 Next, FIG part of a substantially central portion of the wire layer 45B was adhered with an adhesive end of the wire layer 45B of to be removed a certain section to the inner tubular part 43 7
(B)に示すように除去する。 Removed to as shown in (B). 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。 Next, the inner tubular part 43, a wire layer 45A, extruding the outer tube portion 44 on the upper surface of 45B. 次に、ワイヤ層45Aのある部分の略中間部X 1 Then, substantially intermediate portion X 1 of a portion of the wire layer 45A
と、補強層45のない部分の略中間部X 2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 When cut with a substantially middle portion X 2 of the portion without the reinforcing layer 45, a catheter 40 of the wire layer 45A, a portion of the 45B and the main body portion 41, and distal portion 42 of the portion without the reinforcing layer 45
を得る。 Obtained. 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。 Here, in the present embodiment, since equipped with a conventional totally seen not technical matters of "cutting the middle portion of the intermediate portion having no reinforcing layer 45 portion of a portion of the reinforcing layer 45 ' compared to the like for cutting at the boundary portion between the portion having no reinforcing layer 45 with reinforcement layer 45, the reinforcing layer 45 can two pins successive formation of the catheter 40, there is a special advantage that the productivity can be improved . 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。 That is, according to the above manufacturing method, it is possible continuously formed catheter 40 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、 According to the present invention as described above, according to the present invention, the main body portion and the tip portion are integrally formed, large torsional stiffness and having a flexible tip, substantially the outer diameter uniform in the tool body and the tip section with the reduction, it is possible to form a relatively large inner diameter,
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。 Furthermore, a catheter can prevent a change in the torsional rigidity of the main body portion and the distal end portion as gradual, with a faster response of the tip relative to the rotation of the main body portion, a sharp bending of the tip relative to the body portion it is possible to provide a.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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 general 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。 Figure 2 is a partially broken-away view of a catheter according to a conventional example.

【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。 Figure 3 is a partially broken-away view of a catheter according to another conventional example.

【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。 [4] FIG. 4 (A) a plan view showing a catheter according to a first embodiment of the present invention, FIG. 4 (B) is a plan view showing a peeled part of the outer tube portion of the catheter.

【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。 [5] FIG. 5 (A) and (B) is a plan view showing a 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。 [6] FIG. 6 (A) is a plan view showing a catheter according to a second embodiment of the present invention, FIG. 6 (B) is a plan view showing a peeled part of the outer tube portion of the catheter.

【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。 [7] FIG. 7 (A) and (B) is a plan view showing a manufacturing process of the catheter.

【符号の説明】 DESCRIPTION OF SYMBOLS

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 and 41 the body portion 32 and 42 tip 33,43 inner tube portion 34, 44 the outer tube 35 and 45 reinforcing layers 35A, 35B, 45A, 45B wire layer

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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ことを特徴とするカテーテル。 1. A catheter comprising a outer tube portion covering the inner tubular part and the inner tube portion extending from the proximal end to the distal end, the catheter has a distal portion and a body portion, the inner tube in the body portion interposed reinforcing layer composed of one between the parts and the outer tube portion, and the tip portion has no the reinforcing layer, further wherein the reinforcing layer is woven tightly the proximal side of the body portion catheter, wherein the wire layers, that consists of a wire layer woven coarse tip side of the main body portion.
  2. 【請求項2】 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ことを特徴とするカテーテル。 2. A catheter consisting of an outer tube portion that covers the inner tube portion and the inner tube portion extending from the proximal end to the distal end, the catheter has a distal portion and a body portion, the inner tube in the body portion interposed reinforcing layer composed of one between the parts and the outer tube portion, and the tip portion has no the reinforcing layer, further wherein the reinforcing layer is a wire layer woven base end side of the main body When the catheter, characterized by comprising a wire layer is not braided distal end side of the main body.
  3. 【請求項3】 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ことを特徴とするカテーテル。 3. A catheter consisting of an outer tube portion that covers the inner tube portion and the inner tube portion extending from the proximal end to the distal end, the catheter has a distal portion and a body portion, the inner tube in the body portion parts and interposed reinforcing layer composed of one between the outer tube portion, and the tip portion has no the reinforcing layer, further the end portion of the front end side of the reinforcing layer is secured to the inner tubular part catheter, characterized by that.
JP23694091A 1991-08-26 1991-08-26 Catheter Pending JPH05220225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23694091A JPH05220225A (en) 1991-08-26 1991-08-26 Catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23694091A JPH05220225A (en) 1991-08-26 1991-08-26 Catheter

Publications (1)

Publication Number Publication Date
JPH05220225A true true JPH05220225A (en) 1993-08-31

Family

ID=17008007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23694091A Pending JPH05220225A (en) 1991-08-26 1991-08-26 Catheter

Country Status (1)

Country Link
JP (1) JPH05220225A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715863A2 (en) 1994-11-10 1996-06-12 Target Therapeutics, Inc. Catheter
US5891112A (en) * 1995-04-28 1999-04-06 Target Therapeutics, Inc. High performance superelastic alloy braid reinforced catheter
US5891114A (en) * 1997-09-30 1999-04-06 Target Therapeutics, Inc. Soft-tip high performance braided catheter
US5927345A (en) * 1996-04-30 1999-07-27 Target Therapeutics, Inc. Super-elastic alloy braid structure
US5951539A (en) * 1997-06-10 1999-09-14 Target Therpeutics, Inc. Optimized high performance multiple coil spiral-wound vascular catheter
US5971975A (en) * 1996-10-09 1999-10-26 Target Therapeutics, Inc. Guide catheter with enhanced guidewire tracking
US6143013A (en) * 1995-04-28 2000-11-07 Target Therapeutics, Inc. High performance braided catheter
US6152912A (en) * 1997-06-10 2000-11-28 Target Therapeutics, Inc. Optimized high performance spiral-wound vascular catheter
US6159187A (en) * 1996-12-06 2000-12-12 Target Therapeutics, Inc. Reinforced catheter with a formable distal tip
US6197014B1 (en) 1996-05-30 2001-03-06 Target Therapeutics, Inc. Kink-resistant braided catheter with distal side holes
US6689120B1 (en) 1999-08-06 2004-02-10 Boston Scientific Scimed, Inc. Reduced profile delivery system
JP2007229244A (en) * 2006-03-01 2007-09-13 Fukuda Denshi Co Ltd Tube for catheter and control method of manufacturing device of tube for catheter
US7815626B1 (en) * 1998-06-12 2010-10-19 Target Therapeutics, Inc. Catheter with knit section
US8973239B2 (en) 2004-12-10 2015-03-10 Boston Scientific Scimed, Inc. Catheter having an ultra soft tip and methods for making the same

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715863A2 (en) 1994-11-10 1996-06-12 Target Therapeutics, Inc. Catheter
US5658264A (en) * 1994-11-10 1997-08-19 Target Therapeutics, Inc. High performance spiral-wound catheter
US5795341A (en) * 1994-11-10 1998-08-18 Target Therapeutics, Inc. High performance spiral-wound catheter
US5853400A (en) * 1994-11-10 1998-12-29 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
US6143013A (en) * 1995-04-28 2000-11-07 Target Therapeutics, Inc. High performance braided catheter
US5927345A (en) * 1996-04-30 1999-07-27 Target Therapeutics, Inc. Super-elastic alloy braid structure
US6197014B1 (en) 1996-05-30 2001-03-06 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
US6165163A (en) * 1997-09-30 2000-12-26 Target Therapeutics, Inc. Soft-tip performance braided catheter
US7815626B1 (en) * 1998-06-12 2010-10-19 Target Therapeutics, Inc. Catheter with knit section
US8181324B2 (en) 1998-06-12 2012-05-22 Target Therapeutics, Inc. Catheter with knit section
US6689120B1 (en) 1999-08-06 2004-02-10 Boston Scientific Scimed, Inc. Reduced profile delivery system
US8973239B2 (en) 2004-12-10 2015-03-10 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 Tube for catheter and control method of manufacturing device of tube for catheter

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