WO2021014484A1 - Tube thermorétractable et cathéter - Google Patents

Tube thermorétractable et cathéter Download PDF

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Publication number
WO2021014484A1
WO2021014484A1 PCT/JP2019/028404 JP2019028404W WO2021014484A1 WO 2021014484 A1 WO2021014484 A1 WO 2021014484A1 JP 2019028404 W JP2019028404 W JP 2019028404W WO 2021014484 A1 WO2021014484 A1 WO 2021014484A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
shrinkable tube
inner layer
wire
catheter
Prior art date
Application number
PCT/JP2019/028404
Other languages
English (en)
Japanese (ja)
Inventor
優 八木
Original Assignee
朝日インテック株式会社
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.)
Filing date
Publication date
Application filed by 朝日インテック株式会社 filed Critical 朝日インテック株式会社
Priority to JP2021534846A priority Critical patent/JP7159477B2/ja
Priority to PCT/JP2019/028404 priority patent/WO2021014484A1/fr
Publication of WO2021014484A1 publication Critical patent/WO2021014484A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/02—Thermal shrinking

Definitions

  • the present disclosure relates to heat shrink tubing and catheters.
  • Heat-shrinkable tubes that shrink mainly in the radial direction when heated are used as covering materials or reinforcing materials at joints and ends of electric wires, cables, etc., and are also used in the field of medical equipment.
  • Patent Document 1 discloses a heat-shrinkable tube having a hollow cylindrical shape as a whole and having a plurality of protrusions extending inward in the longitudinal direction on the inner circumference thereof.
  • An object of the present disclosure is to provide a technique capable of improving the bonding strength between a heat-shrinkable tube and a resin tube.
  • the heat-shrinkable tube has a cylindrical shape in which a plurality of strands are woven into a mesh pattern.
  • intersections of the plurality of strands may not be joined to each other.
  • intersections of the plurality of strands may be joined to each other.
  • the wire diameter of the wire may increase after shrinking.
  • the wire diameter of the wire may gradually change from the tip to the base end side.
  • the catheter according to one aspect of the present disclosure includes a tubular inner layer, a heat-shrinkable tube which is joined to the inner layer or the outer periphery of the inner layer, and a plurality of strands are woven into a mesh to form a cylindrical shape. It comprises an outer layer that covers the heat shrink tubing.
  • the inner layer or the outer layer may have two resins adjacent to each other along the longitudinal direction of the catheter, and the heat-shrinkable tube may be arranged so as to straddle the two resins.
  • FIG. 1 It is an external view of the heat shrink tube which concerns on embodiment of this disclosure, (a) shows the state before shrinkage, (b) shows the state after shrinkage. It is an end view of the heat-shrinkable tube 1 cut along II-II of FIG. 1 (b).
  • FIG. 1 is an external view of the heat-shrinkable tube 1 according to the embodiment of the present disclosure, (a) shows a state before shrinkage, and (b) shows a state after shrinkage.
  • FIG. 2 is an end view of the heat-shrinkable tube 1 cut along the line II-II of FIG. 1 (b).
  • the heat-shrinkable tube 1 has a cylindrical shape in which a plurality of first strands 11 and a plurality of second strands 12 are woven together in a mesh pattern. Each first wire 11 and each second wire 12 spirals around the axis of the heat-shrinkable tube 1.
  • the heat-shrinkable tube 1 contracts mainly in the radial direction when heated, and the diameters of the first wire 11 and the second wire 12 increase due to the shrinkage.
  • the intersections C of the first strands 11 and the second strands 12 are not joined to each other.
  • a resin material having heat shrinkage can be adopted as a material constituting each first wire 11 and each second wire 12.
  • the resin material is not particularly limited, and examples thereof include biocompatible resin materials such as polyamide resin and fluororesin.
  • a resin having a relatively high melting point for example, PEEK (polyetheretherketone), FEP (fluorinated ethylenepropylene), PTFE (polytetrafluoroethylene)
  • PEEK polyetheretherketone
  • FEP fluorinated ethylenepropylene
  • PTFE polytetrafluoroethylene
  • the wire diameters of the first wire 11 and the second wire 12 are preferably 0.03 to 0.50 mm before shrinkage and 0.04 to 0.60 mm after shrinkage, for example.
  • the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end.
  • the diameter of the heat-shrinkable tube 1 is, for example, 0.5 to 6.0 mm before shrinkage, 0.3 to 5.0 mm after shrinkage, and preferably 1.5 to 3.5 mm before shrinkage. It is preferably 1.0 to 3.0 mm after shrinkage.
  • the catheter 20 as an example to which the heat-shrinkable tube 1 is applied will be described.
  • the form to which the heat-shrinkable tube 1 is applied is not limited to the catheter 20, and examples thereof include a balloon catheter.
  • FIG. 3 is a schematic view of the catheter 20.
  • the catheter 20 is, for example, a catheter used for diagnosing or treating a stenosis or an occlusion.
  • the catheter 20 mainly includes a catheter shaft 30, a tip 40 joined to the tip of the catheter shaft 30, and a connector 50 joined to the rear end of the catheter shaft 30.
  • FIG. 4 is a partial cross-sectional view of the catheter shaft of part A in FIG.
  • the catheter shaft 30 has an inner layer 31, a heat-shrinkable tube 1, and an outer layer 32 in this order from the inside in the radial direction.
  • the inner layer 31 is made of a resin material, has a tubular shape, and has a lumen into which a guide wire or another catheter can be inserted.
  • the resin material forming the inner layer 31 is not particularly limited, but is preferably formed of a resin material having excellent slipperiness, and for example, PTFE is used.
  • the heat-shrinkable tube 1 functions as a reinforcing body, is located outside the inner layer 31, and bites into the inner layer 31. That is, the inner layer 31 has entered the opening M of the heat-shrinkable tube 1.
  • the inner layer 31 is softened by inserting the inner layer 31 into the heat-shrinkable tube 1 before shrinkage, heating the heat-shrinkable tube 1 and the inner layer 31, and shrinking the heat-shrinkable tube 1. Obtained by digging into.
  • the outer layer 32 is made of a resin material and covers the inner layer 31 and the heat-shrinkable tube 1.
  • the outer layer 32 enters the opening M of the heat-shrinkable tube 1 and covers the inner layer 31.
  • the resin material constituting the outer layer 32 is not particularly limited, and polyamide, polyamide elastomer, polyester, polyurethane and the like are used.
  • the heat-shrinkable tube 1 and the catheter 20 of the present disclosure since the heat-shrinkable tube 1 has a plurality of strands 11 and 12 woven into a mesh shape to form a cylindrical shape, the heat-shrinkable tube 1 is heat-shrinked before shrinkage.
  • the inner layer 31 By providing the inner layer 31 inside the tube 1 and contracting the heat-shrinkable tube 1, the inner layer enters the opening M of the heat-shrinkable tube 1.
  • the rigidity of the inner layer 31 can be improved, and the bonding strength between the inner layer 31 and the heat-shrinkable tube 1 can be improved.
  • the outer layer 32 also penetrates into the opening M of the heat-shrinkable tube 1, the bonding strength between the outer layer 32 and the inner layer 31 can be improved.
  • the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be improved.
  • the intersections C of the first strands 11 and the second strands 12 are not joined to each other, but as shown in FIG. 5, the first strands 11 and the intersections C of the second strands 12 are not joined to each other.
  • the intersection C of each of the second strands 12 may be joined to each other. Since the intersections C of the first strands 11 and the second strands 12 are joined to each other, the pitches between the plurality of first strands 11 and between the plurality of second strands 12 are kept constant. Since it can be shrunk in the state, the bonding strength with the inner layer 31 can be further improved.
  • the wire diameters of the first wire 11 and the second wire 12 are substantially constant from one end to the other end, but the first wire 11 and each second wire are substantially constant.
  • the wire diameter of the 2 wire 12 may gradually change from the tip to the base end side.
  • the wire diameters of the first wire 11 and the second wire 12 may gradually decrease from the tip to the base end side.
  • the rigidity of the resin tube (inner layer 31 and outer layer 32) coated with the heat-shrinkable tube 1 can be gradually increased from the tip end to the base end side.
  • the heat-shrinkable tube 1 bites into the inner layer 31, but as shown in FIG. 7, the entire heat-shrinkable tube 1 may be covered with the inner layer 31.
  • the heat shrink tubing 1 may be arranged at the seam 33 between the inner layer 31 and the outer layer 32. That is, the heat-shrinkable tube 1 may be arranged so as to be sandwiched between the inner layer 31 and the outer layer 32.
  • the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the centers of the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33, but the first wire 11 and the second wire 12 of the heat-shrinkable tube 1 are located on the seam 33.
  • the center may be located on the inner layer 31 side or the outer layer 32 side.
  • the inner layer 31 has a first resin 31A and a second resin 31B adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (first resin). It may be arranged so as to straddle 31A and the second resin 31B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the first resin 31A and the second resin 31B are made of different materials, and the first resin 31A located on the tip side of the second resin 31B is made of a material having higher flexibility than the second resin 31B.
  • the outer layer 32 has a third resin 32A and a fourth resin 32B that are adjacent to each other along the longitudinal direction of the catheter 20, and the heat-shrinkable tube 1 has the two resins (third resin). It may be arranged so as to straddle the 32A and the fourth resin 32B). As a result, the bonding hardness between resins made of different materials is improved, and breakage and resin cracking of the catheter shaft 30 can be suppressed.
  • the third resin 32A and the fourth resin 32B are made of different materials, and the third resin 32A located on the tip side of the fourth resin 32B is made of a material having higher flexibility than the fourth resin 32B.
  • each first wire 11 and each second wire 12 spirally extend around the axis of the heat-shrinkable tube 1, as shown in FIG.
  • a plurality of first strands 61 extending along the axial direction and a plurality of second strands 62 extending along the circumferential direction are woven into a mesh shape to form a cylindrical shape. May be.
  • the intersection of each of the first strands 61 and each of the second strands 62 may be in a non-bonded state or may be in a bonded state.
  • the shrinkage ratios of the first wire 61 and the second wire 62 may be the same or different.
  • first strands 11 and 61 and the second strands 12 and 62 are single-layer single wires, but they may be stranded wires or multiple layers.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne une technologie capable d'améliorer la force de liaison entre un tube thermorétractable et un tube en résine.　Ce cathéter est pourvu : d'une couche interne tubulaire ; d'un tube thermorétractable qui est lié à l'intérieur de la couche interne ou à la périphérie externe de la couche interne, est formé d'une pluralité de fils élémentaires tricotés en forme de filet, et a une forme cylindrique ; et d'une couche externe qui recouvre le tube thermorétractable.
PCT/JP2019/028404 2019-07-19 2019-07-19 Tube thermorétractable et cathéter WO2021014484A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021534846A JP7159477B2 (ja) 2019-07-19 2019-07-19 熱収縮チューブおよびカテーテル
PCT/JP2019/028404 WO2021014484A1 (fr) 2019-07-19 2019-07-19 Tube thermorétractable et cathéter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/028404 WO2021014484A1 (fr) 2019-07-19 2019-07-19 Tube thermorétractable et cathéter

Publications (1)

Publication Number Publication Date
WO2021014484A1 true WO2021014484A1 (fr) 2021-01-28

Family

ID=74192454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/028404 WO2021014484A1 (fr) 2019-07-19 2019-07-19 Tube thermorétractable et cathéter

Country Status (2)

Country Link
JP (1) JP7159477B2 (fr)
WO (1) WO2021014484A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000513072A (ja) * 1996-06-18 2000-10-03 レイケム・リミテッド 磨耗保護
JP2010042115A (ja) * 2008-08-11 2010-02-25 Hanako Medical Kk 柔軟性が変化する医療用チューブ
JP2012070906A (ja) * 2010-09-28 2012-04-12 Asahi Intecc Co Ltd ガイドワイヤ
CN104562425A (zh) * 2014-12-26 2015-04-29 深圳市骏鼎达科技有限公司 热收缩结构、套管、保护带及热收缩结构生产方法
JP2017113567A (ja) * 2015-12-23 2017-06-29 バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. 埋め込み式単軸センサーを備える多層カテーテルシャフト構造体及びこれに関連する方法
WO2017195580A1 (fr) * 2016-05-10 2017-11-16 英孝 和田 Microcathéter
JP2018107986A (ja) * 2016-12-28 2018-07-05 日本電設工業株式会社 通線工具

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000513072A (ja) * 1996-06-18 2000-10-03 レイケム・リミテッド 磨耗保護
JP2010042115A (ja) * 2008-08-11 2010-02-25 Hanako Medical Kk 柔軟性が変化する医療用チューブ
JP2012070906A (ja) * 2010-09-28 2012-04-12 Asahi Intecc Co Ltd ガイドワイヤ
CN104562425A (zh) * 2014-12-26 2015-04-29 深圳市骏鼎达科技有限公司 热收缩结构、套管、保护带及热收缩结构生产方法
JP2017113567A (ja) * 2015-12-23 2017-06-29 バイオセンス・ウエブスター・(イスラエル)・リミテッドBiosense Webster (Israel), Ltd. 埋め込み式単軸センサーを備える多層カテーテルシャフト構造体及びこれに関連する方法
WO2017195580A1 (fr) * 2016-05-10 2017-11-16 英孝 和田 Microcathéter
JP2018107986A (ja) * 2016-12-28 2018-07-05 日本電設工業株式会社 通線工具

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Publication number Publication date
JP7159477B2 (ja) 2022-10-24
JPWO2021014484A1 (fr) 2021-01-28

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