JPH11164893A - Indwelling needle and indwelling needle assembly - Google Patents

Indwelling needle and indwelling needle assembly

Info

Publication number
JPH11164893A
JPH11164893A JP9334696A JP33469697A JPH11164893A JP H11164893 A JPH11164893 A JP H11164893A JP 9334696 A JP9334696 A JP 9334696A JP 33469697 A JP33469697 A JP 33469697A JP H11164893 A JPH11164893 A JP H11164893A
Authority
JP
Japan
Prior art keywords
indwelling needle
linear body
main body
reinforcing material
outer tube
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
JP9334696A
Other languages
Japanese (ja)
Inventor
Koichi Tachikawa
浩一 立川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
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 Terumo Corp filed Critical Terumo Corp
Priority to JP9334696A priority Critical patent/JPH11164893A/en
Publication of JPH11164893A publication Critical patent/JPH11164893A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain high fracture resistance, excellent kink resistance, tracking performance, and excellent X-ray impermeability of an indwelling needle, by joining flexible inner and outer tubes via a reinforcing material constituted of a linear body having X-ray impermeability inside. SOLUTION: This indwelling needle main body 2 is made by joining inner and outer tubes 4, 6 constituted of a material flexibility via a reinforcing material 5 containing an X-ray impermeable substance. Inner and outer tubes 4, 6 are preferable to be polyurethane elastomer form the standpoint of kink resistance and economy. A linear body 51 to form the reinforcing material 5 is preferable to be a material with rigidity to obtain sufficient fracture resistance and kink resistance and thermoplastic resin simultaneously fusible with the tip end part of the indwelling needle main body in thermal working. A mater formed in a lattice by the linear body 51 as the reinforcing material 5 is wound around the periphery of the inner tube 4 so as to be alternately overlapped. A matter containing an X-ray impermeable substance as the core layer or a matter containing an X-ray impermeable substance as micropowder is cited for the linear body 51.

Description

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

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば輸液等の動
静脈留置に用いられる留置針に適用される留置針および
留置針組立体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indwelling needle and an indwelling needle assembly applied to an indwelling needle used for indwelling an artery and a vein such as an infusion solution.

【０００２】[0002]

【従来の技術】患者に対し輸液等を行う場合は、留置針
（外針）と内針とで構成される留置針組立体が用いられ
ている。この留置針組立体は、留置針（外針）内に内針
が挿通され一体となった２重針構造をなしており、動静
脈穿刺後に内針のみを抜去し、留置針のみを生体内に残
して使用するものである。そのため留置針本体には、血
管の湾曲、屈曲した部位での追従性を確保するために適
度な柔軟性が必要であり、各種エラストマー等の柔軟な
素材が使用されている。2. Description of the Related Art When performing infusion or the like on a patient, an indwelling needle assembly composed of an indwelling needle (outer needle) and an inner needle is used. This indwelling needle assembly has a double needle structure in which an inner needle is inserted through an indwelling needle (outer needle), and only the inner needle is withdrawn after arteriovenous puncture, and only the indwelling needle is inserted into a living body. To be used. Therefore, the indwelling needle main body needs to have appropriate flexibility in order to ensure the followability of a curved or bent portion of a blood vessel, and a flexible material such as various elastomers is used.

【０００３】しかし、留置針組立体の内針はステンレス
などの金属材料から構成され、その先端には、鋭利な刃
先（針先）が形成されているため、内針を留置針に対し
挿入または抜去する際に、鋭利な刃先により、留置針本
体に、切断、傷付き、削れ、割れ、折れ、剥離、破断等
の破損を与えるおそれがある。特に、このような留置針
本体の破損が生体の留置中に生じることは好ましくはな
い。さらに留置針本体には、血管の湾曲、屈曲した部位
で折れ曲がりが生じない耐キンク性、および製造時の先
端加工性と、血管の損傷軽減のためにできるだけ肉薄で
あることが必要とされる。そのため、柔軟性のみならず
適度な強度や耐破損性が必要とされる。However, since the inner needle of the indwelling needle assembly is made of a metal material such as stainless steel, and has a sharp cutting edge (needle point) formed at its tip, the inner needle is inserted or inserted into the indwelling needle. At the time of withdrawal, there is a possibility that the indwelling needle main body may be damaged such as cut, scratched, shaved, cracked, broken, peeled, broken or the like by the sharp cutting edge. In particular, it is not preferable that such breakage of the indwelling needle body occurs during indwelling of the living body. Further, the indwelling needle main body is required to be as thin as possible in order to curb the blood vessel, to prevent kink from being bent at a bent portion, to process the tip at the time of manufacturing, and to reduce the damage to the blood vessel. Therefore, not only flexibility but also appropriate strength and breakage resistance are required.

【０００４】また上述したように、万が一に破損が生じ
て留置針の一部が体内に残存した際には、留置針本体の
探索が困難となる。この対策として、留置針本体の内外
表面の一部に線状あるいは円環状にＸ線不透過物質を配
した留置針が製造されているが、Ｘ線不透過物質が露出
し、表面平滑性や安全性の点で好ましくない。またこの
問題を回避するべく、中間層としてＸ線不透過物質から
なる層を形成することも考えられるが、中間層のラミネ
ートの肉厚が加わり、留置針本体全体の肉厚を薄くする
ことが困難であり、かつ製造工程が煩雑となる。Further, as described above, if a part of the indwelling needle remains in the body by any chance due to breakage, it becomes difficult to search for the indwelling needle main body. As a countermeasure, an indwelling needle in which an X-ray opaque substance is arranged linearly or annularly on a part of the inner and outer surfaces of the indwelling needle body has been manufactured. It is not preferable in terms of safety. In order to avoid this problem, it is conceivable to form a layer made of an X-ray opaque substance as the intermediate layer. However, the thickness of the laminate of the intermediate layer is added, and the thickness of the entire indwelling needle body may be reduced. It is difficult and the manufacturing process becomes complicated.

【０００５】[0005]

【発明が解決しようとする課題】本発明の目的は、肉薄
で、表面平滑で、耐切断性、耐キンク性、先端加工性お
よびＸ線不透過性に優れる留置針およびそれを用いた留
置針組立体を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an indwelling needle which is thin, has a smooth surface, is excellent in cutting resistance, kink resistance, workability of a tip and X-ray opacity, and an indwelling needle using the same. An object is to provide an assembly.

【０００６】[0006]

【課題を解決するための手段】上記の目的は、下記の本
発明により解決される。 （１）可撓性を有する内管および外管が補強材を介して
接合されてなり、かつ前記補強材は内部にＸ線不透過性
を有する物質を含んだ熱可塑性樹脂製の線状体にて形成
されたものであることを特徴とする留置針本体を備えた
留置針。 （２）前記熱可塑性樹脂がポリアミド系あるいはポリエ
ステル系樹脂である上記（１）に記載の留置針である。The above object is achieved by the present invention described below. (1) A flexible inner tube and an outer tube are joined via a reinforcing material, and the reinforcing material is a linear body made of a thermoplastic resin containing a substance having radiopaque properties inside. An indwelling needle provided with an indwelling needle main body, characterized by being formed by: (2) The indwelling needle according to (1), wherein the thermoplastic resin is a polyamide-based or polyester-based resin.

【０００７】（３）前記Ｘ線不透過性を有する物質が、
前記線状体の芯層として含まれる上記（１）乃至（２）
に記載の留置針である。 （４）前記Ｘ線不透過性を有する物質が、前記線状体に
微粉末として、好ましくは平均粒径０.１〜５μｍの微
粉末として含まれる上記（１）乃至（２）に記載の留置
針である。(3) The substance having radiopacity is:
The above (1) and (2) included as the core layer of the linear body
The indwelling needle described in 1. (4) The above-mentioned (1) or (2), wherein the substance having radiopaque properties is contained in the linear body as a fine powder, preferably as a fine powder having an average particle size of 0.1 to 5 μm. It is an indwelling needle.

【０００８】（５）前記Ｘ線不透過性を有する物質が、
硫酸バリウム、酸化ビスマスあるいは次炭酸ビスマスで
ある上記（１）乃至（４）に記載の留置針である。 （６）前記内管および外管が熱可塑性エラストマーであ
る上記（１）乃至（５）に記載の留置針である。(5) The substance having radiopacity is:
The indwelling needle according to any one of the above (1) to (4), which is barium sulfate, bismuth oxide or bismuth subcarbonate. (6) The indwelling needle according to any one of (1) to (5), wherein the inner tube and the outer tube are thermoplastic elastomers.

【０００９】（７）前記内管および外管が熱可塑性ポリ
ウレタンエラストマーである上記（１）乃至（６）に記
載の留置針である。 （８）上記（１）乃至（７）のいずれに記載の留置針
と、前記留置針の内側に挿入される内針とを備えること
を特徴とする留置針組立体である。(7) The indwelling needle according to (1) to (6), wherein the inner tube and the outer tube are thermoplastic polyurethane elastomers. (8) An indwelling needle assembly comprising: the indwelling needle according to any one of (1) to (7); and an inner needle inserted inside the indwelling needle.

【００１０】本発明の留置針は、その主要部分が内管と
外管とをその接合面に補強材を介して接合しており、補
強材として、内部にＸ線不透過性を有する物質を含んだ
熱可塑性樹脂製の線状体を格子状等に形成したものを用
いている。当該留置針は線状体の存在により、柔軟性を
維持しながら優れた耐キンク性、耐破損性およびＸ線不
透過性が得られる。そのため、血管の湾曲、屈曲した部
位での追従性を確保しながら、同部位での折れ曲がりが
生じない耐キンク性、および製造時の先端加工性を有す
る。また、留置針の鋭利な刃先による耐破損性にも優れ
るが、万が一に体内で切れた場合にもＸ線不透過性であ
るためＸ線造影によって留置針の探索が可能となる。さ
らに、Ｘ線不透過物質が露出しないため、表面平滑性や
安全性の点で優れている。[0010] The indwelling needle according to the present invention has a main part in which an inner tube and an outer tube are joined to each other at a joint surface thereof through a reinforcing material. A linear member made of a thermoplastic resin containing the resin is formed in a lattice shape or the like. The indwelling needle has excellent kink resistance, breakage resistance and X-ray opacity while maintaining flexibility due to the presence of the linear body. Therefore, while ensuring the curveability of the blood vessel and the followability at the bent portion, the kink resistance at which the bend does not occur at the same portion, and the tip workability at the time of manufacturing are obtained. In addition, although the incision needle is excellent in damage resistance due to the sharp cutting edge, even if the indwelling needle is cut in the body, the indwelling needle can be searched for by X-ray imaging because it is radiopaque. Furthermore, since the X-ray opaque substance is not exposed, it is excellent in terms of surface smoothness and safety.

【００１１】また、本発明の留置針では、補強材とし
て、内部にＸ線不透過性を有する物質を含んだ熱可塑性
樹脂製の線状体を格子状等に形成したものを用いるた
め、Ｘ線不透過物質を含んだ中間層をラミネートするも
のよりも厚み増大が回避され、しかも内部にＸ線不透過
性を有する物質を含んだ線状体の作用により、Ｘ線不透
過性が得られる。さらに、Ｘ線不透過性を有する物質
が、前記線状体の芯層に含まれる場合、線状体表面と内
管および外管の良好な密着性が得られやすい。Further, in the indwelling needle of the present invention, since a linear member made of a thermoplastic resin containing an X-ray opaque substance formed inside in a lattice shape or the like is used as a reinforcing material, An increase in thickness is avoided as compared with the case of laminating an intermediate layer containing a radiopaque substance, and furthermore, an X-ray opacity is obtained by the action of a linear body containing a substance having radiopaque inside. . Furthermore, when a substance having radiopacity is contained in the core layer of the linear body, good adhesion between the surface of the linear body and the inner tube and the outer tube is easily obtained.

【００１２】[0012]

【発明の実施の形態】以下、本発明の留置針および留置
針組立体を添付図面に示す好適例に基づいて詳細に説明
する。図１は、本発明の留置針組立体の全体構成例を示
す平面図、図２は、図１に示す留置針本体の中央部付近
の構成を拡大して示す縦断面図である。なお、図１及び
図２では、理解を容易にするために、留置針本体の径方
向を特に拡大して模式的に示してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An indwelling needle and an indwelling needle assembly according to the present invention will be described below in detail with reference to preferred embodiments shown in the accompanying drawings. FIG. 1 is a plan view showing an overall configuration example of the indwelling needle assembly of the present invention, and FIG. 2 is an enlarged longitudinal sectional view showing a configuration near a central portion of the indwelling needle main body shown in FIG. In FIGS. 1 and 2, the radial direction of the indwelling needle main body is particularly schematically shown in an enlarged scale for easy understanding.

【００１３】図１に示す留置針１は、留置針本体２と、
この留置針本体２の基端部２１に装着されたハブ８、お
よび基端部２１をハブ８にかしめて装着するためのかし
めピン７とで構成されている。留置針本体２は、その基
端部２１から先端にかけて内部に管腔３が形成されてい
る。この管腔３は、薬液等の流路となるものであり、留
置針１の血管への挿入時には、管腔３内に内針９の内針
本体９１が挿入されている。ハブ８は、管腔３内への薬
液等の注入口等として機能し、また、留置針１を操作す
る際の把持部としても機能する。An indwelling needle 1 shown in FIG.
The indwelling needle body 2 includes a hub 8 attached to a base end portion 21 and a caulking pin 7 for caulking the base end portion 21 to the hub 8. The lumen 3 is formed inside the indwelling needle main body 2 from the base end 21 to the tip. The lumen 3 serves as a flow path for a drug solution or the like. When the indwelling needle 1 is inserted into a blood vessel, the inner needle main body 91 of the inner needle 9 is inserted into the lumen 3. The hub 8 functions as an inlet for a drug solution or the like into the lumen 3, and also functions as a grip portion when operating the indwelling needle 1.

【００１４】図２は、本発明の留置針の留置針本体の内
部構造を示す一部切り欠き断面図である。図２には、留
置針本体２の中央付近が一部切り欠いた状態で示されて
いる。同図に示すように、留置針本体２は、内管４と外
管６とがＸ線不透過性を有する物質を含む補強材５を介
して接合された構造をなしている。内管および外管は、
それぞれ可撓性（柔軟性）を有する材料で構成されてい
る。FIG. 2 is a partially cutaway sectional view showing the internal structure of the indwelling needle body of the indwelling needle of the present invention. FIG. 2 shows a state where the vicinity of the center of the indwelling needle main body 2 is partially cut away. As shown in the figure, the indwelling needle main body 2 has a structure in which an inner tube 4 and an outer tube 6 are joined via a reinforcing material 5 containing a substance having radiopaque properties. The inner and outer tubes are
Each is made of a material having flexibility (flexibility).

【００１５】内管４および外管６の構成材料としては、
それぞれ、例えば、ポリプロピレン、ポリエチレン、エ
チレンー酢酸ビニル共重合体等のポリオレフィン、ポリ
アミド、ポリエチレンテレフタレート、ポリブチレンフ
タレート等のポリエステル、ポリウレタン、ポリ塩化ビ
ニル、ポリスチレン系樹脂、エチレンーテトラフルオロ
エチレン共重合体等のフッ素系樹脂、ポリアミドエラス
トマー、ポリエステルエラストマー、ポリウレタンエラ
ストマー、ポリスチレンエラストマー、フッ素系エラス
トマー等の各種エラストマー、またはこれらのうち２以
上を組み合わせたものが使用可能である。The constituent materials of the inner tube 4 and the outer tube 6 include:
For example, polypropylene, polyethylene, polyolefins such as ethylene-vinyl acetate copolymers, polyamides, polyesters such as polyethylene terephthalate, polybutylene phthalate, polyurethanes, polyvinyl chloride, polystyrene resins, ethylene-tetrafluoroethylene copolymers and the like Various elastomers such as a fluorine-based resin, a polyamide elastomer, a polyester elastomer, a polyurethane elastomer, a polystyrene elastomer, and a fluorine-based elastomer, or a combination of two or more thereof can be used.

【００１６】これらのうち、抗血栓性、耐キンク性およ
び経済性等の観点から、ポリウレタンエラストマーが好
ましい。ここで、ポリウレタンエラストマーとは、柔軟
性に富む他の樹脂とのポリマーアロイ（ポリマーブレン
ド、グラフト重合、ランダム重合等）や、可塑剤等で軟
質化したもの、さらには、これらの混合物をも含む概念
である。なお、内管４および外管６の構成材料は、同一
でも異なっていてもよい。内管４および外管６の構成材
料が同一または異なる場合において、外管６に用いられ
る材料の硬度は、ショアＤ硬度が３０〜８０程度である
のが好ましい。Of these, polyurethane elastomers are preferred from the viewpoints of antithrombotic properties, kink resistance and economy. Here, the polyurethane elastomer includes a polymer alloy (polymer blend, graft polymerization, random polymerization, or the like) with another resin having high flexibility, or a material softened by a plasticizer or the like, and further includes a mixture thereof. It is a concept. The constituent materials of the inner tube 4 and the outer tube 6 may be the same or different. When the constituent materials of the inner tube 4 and the outer tube 6 are the same or different, the Shore D hardness of the material used for the outer tube 6 is preferably about 30 to 80.

【００１７】図示の構成では、内管４および外管６の内
径および外径は、それぞれ一定となっているが、これら
は留置針本体２の長手方向に沿って変化してもよい。例
えば、内管４の内径が先端方向に向かって漸増する構成
であってもよい。In the configuration shown, the inner and outer diameters of the inner tube 4 and the outer tube 6 are respectively constant, but they may change along the longitudinal direction of the indwelling needle body 2. For example, a configuration may be adopted in which the inner diameter of the inner tube 4 gradually increases toward the distal end.

【００１８】図３は、補強材５として線状体５１を格子
状に形成したものを、内管４外周に線状体５１を交互に
重なるように巻き付けたものを示す。なお、図示の構成
では、留置針本体２の線状体５１は格子状に形成されて
いるが、これに限らず、留置針本体２の軸方向に沿って
直線状に形成されていてもよい。さらに、図示の例で
は、補強材５は、留置針本体２の全長にわたって配設さ
れているが、本発明では、このような構成に限らず、補
強材層５が先端部２２を除く部分に配設されているもの
であってもよい。FIG. 3 shows a reinforcing member 5 in which linear members 51 are formed in a lattice shape and wound around the outer periphery of the inner tube 4 so that the linear members 51 are alternately overlapped. In the illustrated configuration, the linear body 51 of the indwelling needle main body 2 is formed in a lattice shape, but is not limited thereto, and may be formed in a straight line along the axial direction of the indwelling needle main body 2. . Further, in the illustrated example, the reinforcing material 5 is disposed over the entire length of the indwelling needle main body 2. However, the present invention is not limited to such a configuration, and the reinforcing material layer 5 is provided at a portion other than the distal end portion 22. It may be provided.

【００１９】また、図示の例では、１種類の線状体５１
が配設されており、かつ線状体５１は内部にＸ線不透過
物質を含むものとなっているが、本発明では、このよう
な構成に限らず、線状体の種類は２種類以上であっても
よく、かつその内少なくとも１種類の線状体５１が内部
にＸ線不透過物質を含むものであればよい。In the illustrated example, one kind of linear body 51 is used.
Is disposed, and the linear body 51 contains an X-ray opaque substance inside. However, the present invention is not limited to such a configuration, and the number of types of linear bodies is two or more. And at least one of the linear members 51 may contain an X-ray opaque substance.

【００２０】線状体５１は、その断面を図４に示すＸ線
不透過物質５２を芯層として含む物や、その断面を図５
に示すＸ線不透過物質５２を微粉末として含む物があげ
られるが特に限定されない。なお、線状体５１内部の所
定位置に均一にＸ線不透過物質５２を配せられるよう
な、線状体５１の構成材料に対する高い分散性を有する
必要性のため、平均粒径０.１〜５μｍの微粉末として
用いることが好ましい。なお、線状体５１は、Ｘ線不透
過物質５２を芯層として含む場合は公知の芯−鞘型複合
繊維の紡糸方法、微粉末として含む場合は後述する構成
材料に微粉末を混ぜた原料を公知の紡糸方法を用いるこ
とにより得られる。The linear body 51 has an X-ray opaque substance 52 as a core layer shown in FIG. 4 as a core layer, and FIG.
However, there is no particular limitation on the substance containing the X-ray opaque substance 52 as a fine powder. In addition, since it is necessary to have a high dispersibility in the constituent material of the linear body 51 so that the X-ray opaque substance 52 can be uniformly arranged at a predetermined position inside the linear body 51, the average particle diameter is 0.1. It is preferable to use as a fine powder of up to 5 μm. In addition, when the linear body 51 includes the X-ray opaque material 52 as a core layer, a known method of spinning a core-sheath type composite fiber, and when the linear body 51 is included as a fine powder, a raw material obtained by mixing a fine powder with a constituent material described later. By using a known spinning method.

【００２１】補強材５を形成する線状体５１の構成材料
としては、十分な耐破損性と耐キンク性が得られる程度
の剛性を有するものであればいかなるものでもよい。好
ましくは先端部２２の熱加工時溶融可能な熱可塑性を有
するものがよく、例えば、ポリエチレンテレフタレート
（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）の
ようなポリエステル、ポリエチレン、ポリプロピレンの
ようなポリオレフィン、硬質ポリ塩化ビニル、ポリアミ
ド、ポリイミド、ポリスチレン、熱可塑性ポリウレタ
ン、ポリカーボネート、ＡＢＳ樹脂、アクリル樹脂、ポ
リメチルメタクリレート（ＰＭＭＡ）、ポリアセタール
（ＰＡ）、ポリアリレート、ポリオキシメチレン（ＰＯ
Ｍ）、高張力ポリビニルアルコール、フッ素樹脂、ポリ
フッ化ビニリデン（ＰＶｄＦ）、ポリテトラフルオロエ
チレン、エチレン−酢酸ビニルケン化物（ＥＶＯＨ）、
ポリスルホン、ポリエーテルスルホン、ポリエーテルケ
トン、ポリフェニレンオキサイド、ポリフェニレンスル
フィド、これらのうちのいずれかを含むポリマーアロ
イ、あるいはこれらのうちの２以上を組み合わせたもの
が挙げられる。As a constituent material of the linear body 51 forming the reinforcing member 5, any material may be used as long as it has sufficient rigidity to obtain sufficient breakage resistance and kink resistance. Preferably, the tip 22 has thermoplasticity that can be melted during thermal processing. Examples thereof include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyolefins such as polyethylene and polypropylene, and hard polychloride. Vinyl, polyamide, polyimide, polystyrene, thermoplastic polyurethane, polycarbonate, ABS resin, acrylic resin, polymethyl methacrylate (PMMA), polyacetal (PA), polyarylate, polyoxymethylene (PO
M), high tensile strength polyvinyl alcohol, fluororesin, polyvinylidene fluoride (PVdF), polytetrafluoroethylene, ethylene-vinyl acetate saponified (EVOH),
Examples thereof include polysulfone, polyether sulfone, polyether ketone, polyphenylene oxide, polyphenylene sulfide, a polymer alloy containing any of these, or a combination of two or more of these.

【００２２】ここで、ポリアミドとは、例えば、ナイロ
ン６、ナイロン６４、ナイロン６６、ナイロン６１０、
ナイロン６１２、ナイロン４６、ナイロン９、ナイロン
１１、ナイロン１２、Ｎ−アルコキシメチル変成ナイロ
ン、ヘキサメチレンジアミンーイソフタル酸縮重合体、
メタキシロイルジアミンーアジピン酸縮重合体のような
各種脂肪族または芳香族ポリアミドが代表的であり、そ
の他、前記ポリアミドと他の樹脂とのポリマーアロイ
（ポリマーブレンド、グラフト重合、ランダム重合
等）、さらには、これらの混合物をも含む概念である。Here, polyamide refers to, for example, nylon 6, nylon 64, nylon 66, nylon 610,
Nylon 612, Nylon 46, Nylon 9, Nylon 11, Nylon 12, N-alkoxymethyl modified nylon, Hexamethylenediamine-isophthalic acid condensation polymer,
Representative examples include various aliphatic or aromatic polyamides such as metaxyloyldiamine-adipic acid condensate, and polymer alloys of the polyamide and other resins (polymer blend, graft polymerization, random polymerization, etc.), Furthermore, the concept includes these mixtures.

【００２３】補強材５内部に含むＸ線不透過物質５２と
しては、十分なＸ線不透過性を有するものであればいか
なるものでもよい。例えば、硫酸バリウム、酸化ビスマ
ス、次炭酸ビスマス、粉末状タングステン、粉末状タン
タルあるいはこれらを組み合わせたものが挙げられる。The X-ray opaque material 52 contained in the reinforcing member 5 may be any material as long as it has sufficient X-ray opacity. For example, barium sulfate, bismuth oxide, bismuth subcarbonate, powdered tungsten, powdered tantalum, or a combination thereof can be used.

【００２４】なお、線状体５１は、上記材料等による単
繊維または繊維の集合体（例えば単繊維を縒ったもの）
のいずれでもよいが、留置針本体の先端部２２の後加工
性から、単繊維が好ましい。また、線状体５１の太さ
は、その構成材料との関係で必要かつ十分な補強効果お
よび柔軟性が得られる程度のものであり、かつ留置針本
体の先端部の後加工が容易なものとされ、たとえば上記
ポリアミド単繊維による場合は、直径２０〜５０μｍ程
度とするのが好ましい。なお、線状体５１は、単一で用
いても、複数本を束ねた状態で用いてもよい。The linear body 51 is made of a single fiber or an aggregate of fibers (for example, a single fiber twisted) made of the above-described materials.
However, single fibers are preferred from the viewpoint of the post-processability of the distal end portion 22 of the indwelling needle main body. Further, the thickness of the linear body 51 is such that the necessary and sufficient reinforcing effect and flexibility are obtained in relation to the constituent material thereof, and the post-processing of the distal end portion of the indwelling needle main body is easy. For example, in the case of the above-mentioned polyamide single fiber, the diameter is preferably about 20 to 50 μm. In addition, the linear body 51 may be used singly or may be used in a state where a plurality of bundles are bundled.

【００２５】また、線状体５１は、留置針本体の先端部
２２を加熱処理によりテーパ状に加工したり、また、留
置針本体の基端部２１をかしめピンを嵌めるために加熱
処理により予めラッパ状に加工したりする際に、留置針
本体２と同時に溶融または軟化することが好ましい。実
際、線状体５１と留置針本体２の溶融または軟化温度の
差が６０℃以内であれば加工が容易であり、またその差
が３０℃以内であればさらに加工が容易となる。以上の
ような留置針１によれば、留置針本体２の優れた耐切断
性および耐キンク性が得られ、しかも肉薄でＸ線不透過
性にも優れる。The linear body 51 is formed by heating the distal end portion 22 of the indwelling needle body into a tapered shape by heating, or caulking the base end portion 21 of the indwelling needle body by heating to fit a pin. When processing into a trumpet shape, it is preferable to melt or soften simultaneously with the indwelling needle main body 2. Actually, if the difference between the melting or softening temperature of the linear body 51 and the indwelling needle main body 2 is within 60 ° C., the working is easy, and if the difference is within 30 ° C., the working becomes even easier. According to the indwelling needle 1 as described above, the indwelling needle main body 2 has excellent cutting resistance and kink resistance, and is thin and has excellent X-ray opacity.

【００２６】次に、本発明の留置針の留置針本体の製造
方法の好適例について説明する。まず、定法に従い、内
管４を成形する。次に、この内管４の外周面に線状体５
１を交互に重なるように格子状に巻き付ける。この巻き
付け方法は、例えばスパイラル機と呼ばれる装置（図示
せず）を用い、その線状体供給部から線状体５１を繰り
出し、一方、前記線状体供給部に対し内管４をその軸方
向に移動するとともにその軸を中心に回転して、内管４
の外周面に線状体５１を連続的に巻き付けて行く。Next, a preferred example of the method for manufacturing the indwelling needle main body of the indwelling needle of the present invention will be described. First, the inner tube 4 is formed according to a standard method. Next, a linear body 5
1 are wound in a grid pattern so as to alternately overlap. In this winding method, for example, a device (not shown) called a spiral machine is used to feed out the linear body 51 from the linear body supply portion, and the inner tube 4 is moved in the axial direction with respect to the linear body supply portion. To the inner tube 4
The linear body 51 is continuously wound around the outer peripheral surface of.

【００２７】また、上記では、内管４が回転しかつ軸方
向に移動する移動方式としているが、本発明では、内管
４と線状体供給部とが相対的に回転し、かつ相対的に内
管軸方向に移動すればよいため、例えば、内管４が回転
し、線状体供給部が内管軸方向に移動する構成、内管
４が軸方向に移動し、線状体供給部が内管の外周回りに
回転する構成、内管４が固定され、線状体供給部が内
管４の外周回りに回転するとともに内管軸方向に移動す
る構成またはこれらを組み合わせた構成であってもよ
い。In the above description, the inner tube 4 is rotated and moved in the axial direction. However, in the present invention, the inner tube 4 and the linear body supply unit are relatively rotated and relatively moved. For example, since the inner pipe 4 may be moved in the axial direction, the inner pipe 4 is rotated, and the linear body supply unit is moved in the axial direction of the inner pipe. The configuration is such that the portion rotates around the outer circumference of the inner pipe, the inner pipe 4 is fixed, and the linear body supply section rotates about the outer circumference of the inner pipe 4 and moves in the axial direction of the inner pipe, or a combination thereof. There may be.

【００２８】以上のようにして内管４の外周面に補強材
５が形成されたら、その外周を外管６で被覆する。外管
６の接合は、外管６の内周面が内管４の外周面および線
状体５１と密着するようになされ、その方法としては、
例えば、接着剤または溶剤により接着する方法、内管４
等と融着（例えば、熱融着、高周波融着）する方法、外
管６を加熱または溶剤により膨潤させて内管４を挿入
し、その後収縮させる方法、溶融した外管材料または液
状化した外管材料を被着させ、冷却または脱溶媒処理に
より固化させて外管６を形成する方法等が挙げられる
が、この中で溶融した外管材料を被着させ、冷却により
固化させて外管６を形成する方法が製造工程が簡単であ
り、かつ産業分野において一般的な方法である。After the reinforcing member 5 is formed on the outer peripheral surface of the inner tube 4 as described above, the outer periphery is covered with the outer tube 6. The outer tube 6 is joined such that the inner peripheral surface of the outer tube 6 is in close contact with the outer peripheral surface of the inner tube 4 and the linear body 51.
For example, a method of bonding with an adhesive or a solvent, the inner tube 4
(For example, heat fusion, high-frequency fusion), the outer tube 6 is heated or swelled by a solvent, the inner tube 4 is inserted, and then the outer tube 6 is contracted. A method of forming an outer tube 6 by applying an outer tube material and solidifying the outer tube material by cooling or desolvation treatment may be used. In this method, a molten outer tube material is applied and solidified by cooling. The method of forming 6 has a simple manufacturing process and is a common method in the industrial field.

【００２９】本発明によれば、上記外管形成方法におい
て、溶融した外管材料を被着させる前に補強材５の表面
を適度に予備加熱した後、溶融した外管材料を被着さ
せ、冷却により固化させて外管６を形成させる。以上の
ような留置針１によれば、留置針本体２の肉厚が薄く、
優れた耐切断性及び耐キンク性が得られ、しかも肉薄で
Ｘ線不透過性も有する留置針本体２が得られる。According to the present invention, in the above outer tube forming method, the surface of the reinforcing member 5 is appropriately preheated before the molten outer tube material is applied, and then the molten outer tube material is applied. The outer tube 6 is formed by solidification by cooling. According to the indwelling needle 1 as described above, the thickness of the indwelling needle main body 2 is thin,
The indwelling needle main body 2 which has excellent cut resistance and kink resistance, is thin, and has radiopaque properties is obtained.

【００３０】[0030]

【実施例】以下、本発明の留置針の留置針本体の具体的
実施例について説明する。各実施例にその条件を示す図
２〜図３に示す構成の留置針本体を前述した方法により
製造した。なお、補強材の作製には電線加工用横巻きシ
ールド機を用い、線状体５１を交互に整線しダイスで密
着巻き付けを行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the indwelling needle body of the indwelling needle of the present invention will be described. The indwelling needle main body having the configuration shown in FIGS. 2 and 3 showing the conditions in each example was manufactured by the method described above. The reinforcing material was manufactured by using a horizontal winding shield machine for processing electric wires, alternately arranging the linear bodies 51, and tightly winding them with a die.

【００３１】この巻き付け方法は、電線加工用横巻きシ
ールド機の線状体供給部から線状体５１を繰り出し、一
方前記線状体供給部に対し内管４をその軸方向に移動す
るとともにその軸を中心に回転して、内管４の外周面に
線状体５１を留置針本体２の軸方向に対して一定の角度
及びピッチで連続的に巻き付けて行き、さらに引き続い
て別のもう１台の電線加工用横巻きシールド機の線状体
供給部から線状体５１を繰り出し、一方前記線状体供給
部に対し内管４をその軸方向に移動するとともにその軸
を中心に、線状体５１の巻き付け方向とは反対方向に回
転して、内管４の外周面に線状体５１を留置針本体２の
軸方向に対して一定の角度及びピッチで連続的に巻き付
けて行く。これにより、線状体５１どうしが交差し、線
状体５１どうしの組合せで格子点が形成される。この巻
き付け時に、前記線状体供給部に予めセッティングされ
る線状体数により、前記ピッチ間の各線状体数すなわち
各線状体密度が決定される。In this winding method, the wire 51 is fed out from the wire supply portion of the horizontal winding shield machine for wire processing, while the inner pipe 4 is moved in the axial direction with respect to the wire supply portion and the wire 51 is moved. Rotating around the axis, the linear body 51 is continuously wound around the outer peripheral surface of the inner tube 4 at a constant angle and pitch with respect to the axial direction of the indwelling needle main body 2, and subsequently, another one is further wound. The linear body 51 is paid out from the linear body supply section of the horizontal winding shield machine for processing electric wires, while the inner pipe 4 is moved in the axial direction with respect to the linear body supply section, and the wire is moved around the axis. The wire 51 is rotated in the direction opposite to the direction in which the wire 51 is wound, and the wire 51 is continuously wound around the outer peripheral surface of the inner tube 4 at a constant angle and pitch with respect to the axial direction of the indwelling needle main body 2. As a result, the linear bodies 51 intersect, and a lattice point is formed by a combination of the linear bodies 51. At the time of this winding, the number of linear bodies between the pitches, that is, the density of each linear body is determined by the number of linear bodies preset in the linear body supply unit.

【００３２】尚、外管形成方法において、溶融した外管
材料を被着させる前に、補強材層５の表面を１６０℃で
予備加熱し、線状体５１を適度に加熱させた後、溶融し
た外管材料を被着させ、冷却により固化させて外管６を
形成させた。In the outer tube forming method, before the molten outer tube material is applied, the surface of the reinforcing material layer 5 is preheated at 160 ° C., and the linear body 51 is appropriately heated. The outer tube material thus formed was applied and solidified by cooling to form an outer tube 6.

【００３３】上記の補強材層５の表面を加熱する時、加
熱温度が１８０℃だと温度が高すぎて線状体５１も溶融
してしまい、補強材層５の補強効果が殆ど消失する。ま
た、加熱温度が１００℃だと温度が低すぎて線状体５１
が余り加熱されないために、内管と外管の密着性が低
い。When the surface of the reinforcing material layer 5 is heated at a heating temperature of 180 ° C., the temperature is too high and the linear body 51 is melted, and the reinforcing effect of the reinforcing material layer 5 is almost lost. If the heating temperature is 100 ° C., the temperature is too low and the linear body 51
Is not heated so much that the adhesion between the inner tube and the outer tube is low.

【００３４】（実施例１）下記にその条件を示す留置針
本体を前述した方法により製造した。 留置針本体全長：３２ｍｍ 外管６の外径：０.８６ｍｍ 内管４の外径：０.７５ｍｍ 内管４の内径：０.６４ｍｍ 外管６の構成材料：熱可塑性ポリウレタンエラストマー
（ショアＤ硬度：６７、融点：１７０℃） 内管４の構成材料：外管６に同じ 線状体５１の構成材料：ポリアミド（ナイロン６、融
点：２１０℃）の単繊維 線状体５１の直径：４１μｍ Ｘ線不透過物質５２の構成材料：硫酸バリウム（平均粒
径０.６５μｍ） 補強材層５の構成：線状体５１を格子状に形成（図３に
示す状態） 留置針本体２の軸方向に対する傾斜角度：４５度 巻き付けピッチ：１.５ｍｍ 線状体５１の本数：１６本Example 1 An indwelling needle main body having the following conditions was produced by the above-described method. Indwelling needle body total length: 32 mm Outer diameter of outer tube 6: 0.86 mm Outer diameter of inner tube 4: 0.75 mm Inner tube 4 inner diameter: 0.64 mm Constituent material of outer tube 6: thermoplastic polyurethane elastomer (Shore D hardness) : 67, melting point: 170 ° C) Material of the inner tube 4: Same as the outer tube 6 Material of the linear body 51: Single fiber of polyamide (nylon 6, melting point: 210 ° C) Diameter of the linear body 51: 41 μm X Material of the radiopaque material 52: barium sulfate (average particle size 0.65 μm) Structure of the reinforcing material layer 5: linear bodies 51 are formed in a lattice shape (the state shown in FIG. 3) with respect to the axial direction of the indwelling needle main body 2. Tilt angle: 45 degrees Winding pitch: 1.5 mm Number of linear bodies 51: 16

【００３５】（試験例）得られた留置針本体２の耐キン
ク性を調べるために、留置針本体２を５ｍｍの曲率で９
０度に５０回繰り返し曲げた時の、留置針本体２の折れ
の有無を調べた。また、３００ｍｍ／分の速度で留置針
本体２を軸方向に真直に引張した際の破断時の荷重を測
定した。さらに、留置針本体２の外管表面の平滑性につ
いて目視確認を行い、Ｘ線不透過性についてはＸ線照射
写真により目視確認を行った。これらの結果を下記表１
に示す。なお、測定は、室温下（２０℃）および恒温下
（３７℃（体温付近））で行った。(Test Example) In order to examine the kink resistance of the obtained indwelling needle main body 2, the indwelling needle main body 2 was set at 9 mm with a curvature of 5 mm.
The presence or absence of breakage of the indwelling needle main body 2 when repeatedly bent at 0 degrees 50 times was examined. Further, the load at break when the indwelling needle main body 2 was pulled straight in the axial direction at a speed of 300 mm / min was measured. Furthermore, the smoothness of the outer tube surface of the indwelling needle main body 2 was visually confirmed, and the X-ray opacity was visually confirmed by an X-ray irradiation photograph. The results are shown in Table 1 below.
Shown in The measurement was performed at room temperature (20 ° C.) and at a constant temperature (37 ° C. (near body temperature)).

【００３６】[0036]

【表１】 [Table 1]

【００３７】（実施例２）線状体５１の本数を各１２本
とした以外は実施例１と同様の留置針本体を製造し、上
記試験例と同様の測定を行った結果を下記表２に示す。(Example 2) The same indwelling needle body as in Example 1 was manufactured except that the number of the linear bodies 51 was 12 each, and the same measurement as in the above-mentioned test example was performed. Shown in

【００３８】[0038]

【表２】 [Table 2]

【００３９】（実施例３）Ｘ線不透過物質５２の構成材
料を酸化ビスマス（平均粒径２.５μｍ）とした以外は
実施例１と同様の留置針本体を製造し、上記試験例と同
様の測定を行った結果を下記表３に示す。Example 3 An indwelling needle body was manufactured in the same manner as in Example 1 except that bismuth oxide (average particle size: 2.5 μm) was used as a constituent material of the X-ray opaque substance 52, and the same as in the above-mentioned test example. Table 3 below shows the results of the measurement.

【００４０】[0040]

【表３】 [Table 3]

【００４１】（実施例４）Ｘ線不透過物質５２を線状体
５１の断面積の５０％を占める芯層として構成した以外
は実施例１と同様の留置針本体を製造し、上記試験例と
同様の測定を行った結果を下記表４に示す。(Example 4) The same indwelling needle body as in Example 1 was manufactured except that the X-ray opaque substance 52 was constituted as a core layer occupying 50% of the cross-sectional area of the linear body 51, and the above test example was performed. Table 4 below shows the results of the same measurements.

【００４２】[0042]

【表４】 [Table 4]

【００４３】（比較例１）線状体５１を配設しないこと
以外は実施例１と同様の留置針本体を製造し、上記試験
例と同様の測定を行った結果を下記表５に示す。Comparative Example 1 The same indwelling needle body as in Example 1 was manufactured except that the linear body 51 was not provided, and the same measurement as in the above-mentioned test example was performed. The results are shown in Table 5 below.

【００４４】[0044]

【表５】 [Table 5]

【００４５】（比較例２）外管６及び内管４の構成材料
に硫酸バリウムを３０ｗｔ％均一混合した以外は比較例
１と同様の留置針本体を製造し、上記試験例ト同様の測
定を行った結果を下記表６に示す。(Comparative Example 2) An indwelling needle body similar to that of Comparative Example 1 was manufactured except that barium sulfate was uniformly mixed with 30 wt% of the constituent materials of the outer tube 6 and the inner tube 4, and the same measurement as in the above Test Example 1 was performed. The results obtained are shown in Table 6 below.

【００４６】[0046]

【表６】 [Table 6]

【００４７】（結果）以上、本発明の留置針の留置針本
体の各実施例及び比較例に示すように、折れ発生頻度、
耐破断（破損）性、潤滑性、Ｘ線不透過性のすべてにお
いて、実施例は優れた効果を示した。また、Ｘ線不透過
性を有する物質を芯層として含む線状体５１を用いる他
は各実施例と同じ条件の留置針本体についても同様な試
験を行った結果、各実施例と同様の優れた効果を示し
た。なお、本発明はこれらに限定されるものではない。(Results) As described in each of the examples and comparative examples of the indwelling needle body of the indwelling needle of the present invention,
The examples showed excellent effects in all of the rupture (breakage) resistance, lubricity, and X-ray opacity. In addition, a similar test was performed on the indwelling needle body under the same conditions as in each of the examples except that the linear body 51 containing a substance having radiopaque properties as the core layer was used. Showed the effect. Note that the present invention is not limited to these.

【００４８】[0048]

【発明の効果】以上述べたように、本発明の留置針によ
れば、留置針本体２は補強材により十分な破断強度が得
られるため、高い耐破損性を有し、また、優れた耐キン
ク性と追随性が発揮される。また、線状体に熱可塑性樹
脂を用いることにより、先端部の熱加工時に線状体が溶
融可能となり、テーパー状の先端加工等が容易となる。
この結果、留置針本体の切断や折れ曲がり等の事故を防
止することができる。さらに、内部にＸ線不透過性を有
する物質を含んだ線状体を補強材として用いるため、線
状体のＸ線不透過作用により、優れたＸ線不透過性が容
易に得られる。As described above, according to the indwelling needle of the present invention, the indwelling needle main body 2 has a sufficient breaking strength due to the reinforcing material, and therefore has high breakage resistance and excellent resistance to breakage. Kink property and followability are exhibited. Further, by using a thermoplastic resin for the linear body, the linear body can be melted at the time of thermal processing of the distal end portion, and the tapered distal end processing and the like can be facilitated.
As a result, accidents such as cutting and bending of the indwelling needle main body can be prevented. Furthermore, since a linear body containing a substance having radiopaque properties therein is used as a reinforcing material, excellent radiopaque properties can be easily obtained by the radiopaque action of the linear body.

【００４９】つまり本発明は、当該留置針は線状体の存
在により、柔軟性を維持しながら優れた耐キンク性、耐
破損性およびＸ線不透過性が得られる。そのため、血管
の湾曲、屈曲した部位での追従性を確保しながら、同部
位での折れ曲がりが生じない耐キンク性、および製造時
の先端加工性を有する。また、留置針の鋭利な刃先によ
る耐破損性にも優れるが、万が一に体内で切れた場合に
もＸ線不透過性であるためＸ線造影によって留置針の探
索が可能となる。さらに、Ｘ線不透過物質が露出しない
ため、表面平滑性や安全性の点で優れている。That is, in the present invention, the indwelling needle has excellent kink resistance, breakage resistance and X-ray opacity while maintaining flexibility due to the presence of the linear body. Therefore, while ensuring the curveability of the blood vessel and the followability at the bent portion, the kink resistance at which the bend does not occur at the same portion, and the tip workability at the time of manufacturing are obtained. In addition, although the incision needle is excellent in damage resistance due to the sharp cutting edge, even if the indwelling needle is cut in the body, the indwelling needle can be searched for by X-ray imaging because it is radiopaque. Furthermore, since the X-ray opaque substance is not exposed, it is excellent in terms of surface smoothness and safety.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 本発明の留置針組立体の構成例を示す平面図
である。FIG. 1 is a plan view showing a configuration example of an indwelling needle assembly of the present invention.

【図２】 図１に示す留置針の留置針組立体の内部構造
を示す一部切り欠き断面図である。FIG. 2 is a partially cutaway sectional view showing the internal structure of the indwelling needle assembly of the indwelling needle shown in FIG.

【図３】 図１に示す留置針の留置針組立体における補
強材の構成を示す斜視図である。FIG. 3 is a perspective view showing a configuration of a reinforcing member in the indwelling needle assembly of the indwelling needle shown in FIG.

【図４】 図１に示す留置針の留置針組立体の補強材に
おける線状体の内部構造の一例を示す断面図である。4 is a cross-sectional view showing an example of an internal structure of a linear body in a reinforcing material of the indwelling needle assembly of the indwelling needle shown in FIG.

【図５】 図１に示す留置針の留置針組立体の補強材に
おける線状体の内部構造の他例を示す断面図である。FIG. 5 is a cross-sectional view showing another example of the internal structure of the linear body in the reinforcing material of the indwelling needle assembly of the indwelling needle shown in FIG.

【符号の説明】[Explanation of symbols]

１ ；留置針 ２ ；留置針本体 ２１；基端部 ２２；先端部 ３ ；管腔 ４ ；内管 ５ ；補強材 ５１；線状体 ５２；Ｘ線不透過性物質 ６ ；外管 ７ ；かしめピン ８ ；ハブ外管 ９ ；内針 ９１；内針本体 ９２；刃先（針先） １０ ；内針ハブ DESCRIPTION OF SYMBOLS 1; indwelling needle 2; indwelling needle main body 21; base end 22; distal end 3; lumen 4; inner tube 5; reinforcing material 51; Pin 8; Hub outer tube 9; Inner needle 91; Inner needle main body 92; Blade tip (needle tip) 10; Inner needle hub

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】可撓性を有する内管および外管が補強材を
介して接合されてなり、かつ前記補強材は内部にＸ線不
透過性を有する物質を含んだ熱可塑性樹脂製の線状体に
て形成されたものであることを特徴とする留置針本体を
備えた留置針。An inner tube and an outer tube having flexibility are joined via a reinforcing material, and the reinforcing material is a wire made of a thermoplastic resin containing a radiopaque substance inside. An indwelling needle provided with an indwelling needle main body, which is formed in a shape. 【請求項２】前記熱可塑性樹脂がポリアミド系あるいは
ポリエステル系樹脂である請求項１に記載の留置針。2. The indwelling needle according to claim 1, wherein said thermoplastic resin is a polyamide or polyester resin. 【請求項３】前記Ｘ線不透過性を有する物質が、前記線
状体の芯層として含まれる請求項１乃至２に記載の留置
針。3. The indwelling needle according to claim 1, wherein the radiopaque substance is contained as a core layer of the linear body. 【請求項４】前記Ｘ線不透過性を有する物質が、前記線
状体に微粉末として含まれる請求項１乃至２に記載の留
置針。4. The indwelling needle according to claim 1, wherein the substance having radiopaque properties is contained as fine powder in the linear body. 【請求項５】前記Ｘ線不透過性を有する物質が、硫酸バ
リウム、酸化ビスマスあるいは次炭酸ビスマスである請
求項１乃至４に記載の留置針。5. The indwelling needle according to claim 1, wherein the substance having radiopaque properties is barium sulfate, bismuth oxide or bismuth subcarbonate. 【請求項６】前記内管および外管が熱可塑性エラストマ
ーである請求項１乃至５に記載の留置針。6. The indwelling needle according to claim 1, wherein the inner tube and the outer tube are made of a thermoplastic elastomer. 【請求項７】前記内管および外管が熱可塑性ポリウレタ
ンエラストマーである請求項１乃至６に記載の留置針。7. The indwelling needle according to claim 1, wherein the inner tube and the outer tube are made of a thermoplastic polyurethane elastomer. 【請求項８】請求項１乃至７のいずれに記載の留置針
と、前記留置針の内側に挿入される内針とを備えること
を特徴とする留置針組立体。8. An indwelling needle assembly comprising the indwelling needle according to any one of claims 1 to 7, and an inner needle inserted inside the indwelling needle.
JP9334696A 1997-12-04 1997-12-04 Indwelling needle and indwelling needle assembly Pending JPH11164893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9334696A JPH11164893A (en) 1997-12-04 1997-12-04 Indwelling needle and indwelling needle assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9334696A JPH11164893A (en) 1997-12-04 1997-12-04 Indwelling needle and indwelling needle assembly

Publications (1)

Publication Number Publication Date
JPH11164893A true JPH11164893A (en) 1999-06-22

Family

ID=18280204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9334696A Pending JPH11164893A (en) 1997-12-04 1997-12-04 Indwelling needle and indwelling needle assembly

Country Status (1)

Country Link
JP (1) JPH11164893A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2008056625A1 (en) * 2006-11-07 2010-02-25 株式会社カネカ Medical catheter tube
CN113084911A (en) * 2021-03-25 2021-07-09 苏州嘉斯度智能装备有限公司 Melt head structure of automatic melt head machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2008056625A1 (en) * 2006-11-07 2010-02-25 株式会社カネカ Medical catheter tube
CN113084911A (en) * 2021-03-25 2021-07-09 苏州嘉斯度智能装备有限公司 Melt head structure of automatic melt head machine
CN113084911B (en) * 2021-03-25 2023-02-21 苏州嘉斯度智能装备有限公司 Melt head structure of automatic melt head machine

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