JP5158953B2

JP5158953B2 - Medical infusion tube

Info

Publication number: JP5158953B2
Application number: JP2008127686A
Authority: JP
Inventors: 誠西村; 幸西村
Original assignee: River Seiko Co Ltd
Current assignee: River Seiko Co Ltd
Priority date: 2008-04-14
Filing date: 2008-04-14
Publication date: 2013-03-06
Anticipated expiration: 2028-04-14
Also published as: JP2009254764A

Description

本発明は、医療用輸液チューブに関する。 The present invention relates to a medical infusion tube.

医療用輸液チューブは、体内への輸血、薬液或いは栄養液等の注入、又は体内からの排液（ドレナージ）や人工透析等を行うために、数時間以上にわたって留置されるものであり、可撓性のある合成樹脂材製のチューブで形成されている（例えば、特許文献１、２）。
特開２００４−１７３８４４号公報特開平８−５２２１１号公報 A medical infusion tube is placed for several hours or more in order to perform blood transfusion into the body, injection of medicinal solution or nutrient solution, drainage from the body, artificial dialysis, etc. It is formed of a tube made of a synthetic resin material (for example, Patent Documents 1 and 2).
JP 2004-173844 A JP-A-8-52211

医療用輸液チューブは一般に、高い位置に吊り下げられた輸液バッグ等に接続されて、チューブの先端に接続された穿刺具等が、その下方に横たわっている患者に穿刺された状態で長時間留置され、その間に患者が動くことは避けられない。すると、例えば図４に示されるように、輸液チューブ１が患者の動作で捩じれ合って弛みがなくなり（又は少なくなり）、引っ張られ易い状態になるため、その後の患者の動きによって接続部が外れてしまったり、輸液が正常に行われなくなってしまうおそれがあった。 A medical infusion tube is generally connected to an infusion bag or the like suspended at a high position, and a puncture device connected to the tip of the tube is punctured by a patient lying underneath for a long time. It is inevitable that the patient moves during that time. Then, for example, as shown in FIG. 4, the infusion tube 1 is twisted by the movement of the patient so that the infusion tube 1 is not loosened (or reduced) and is easily pulled. There was a risk that the infusion would not be performed normally.

本発明はそのような問題を解決するためになされたものであり、留置状態の間に患者が動いても捩れ合い難くて、接続部が外れるような事故が起こり難い安全性の高い医療用輸液チューブを提供することを目的とする。 The present invention has been made to solve such a problem, and it is difficult to twist even if a patient moves during the indwelling state, and it is difficult to cause an accident such as disconnection. The object is to provide a tube.

医療用の輸液の流路を形成する可撓性の合成樹脂材からなる医療用輸液チューブであって、中心軸周りの一定方向に、他の部分より可撓性が小さくて曲げ動作に対する抵抗が大きい硬質部が同じ向きに形成され、硬質部が他の部分より硬質の合成樹脂材で形成されている。
なお、硬質部が他の部分と同じ又は同系の材質で形成されていてもよい。また、硬質部が中心軸周りの四分の一周ないし四分の三周の範囲に形成されていてもよく、三分の一周ないし三分の二周の範囲に形成されているとより好ましい。また、硬質部が中心軸周りの略半周の範囲に形成されていてもよい。 A medical infusion tube made of a flexible synthetic resin material that forms a flow path for medical infusion, which is less flexible than other parts in a certain direction around the central axis and has a resistance to bending action. A large hard part is formed in the same direction, and the hard part is formed of a harder synthetic resin material than the other parts .
The hardness transforming portion may be formed of a material having the same or syngeneic with other parts. Further, the hard portion may be formed in the range of one quarter or three quarters around the central axis, and more preferably in the range of one third or two thirds. Moreover, the hard part may be formed in the range of the substantially half circumference around the central axis.

また、硬質部の硬度がＪＩＳ−Ｋ６２５３デュロメータータイプＡの硬度に準拠した場合に、他の部分の２倍以上の硬度であるとよく、硬質部の硬度が６０°ないし９０°、他の部分の硬度が２０°ないし３０°であってもよい。そして、硬質部が全長にわたって形成されていてもよいが、硬質部が全長の一部分に形成されていてもよく、硬質部が形成されているのが全長のうちの０．５ｍないし１．５ｍの範囲であってもよい。 In addition, when the hardness of the hard part conforms to the hardness of JIS-K6253 durometer type A, the hardness of the hard part is preferably at least twice that of the other part, and the hardness of the hard part is 60 ° to 90 °. The hardness may be 20 ° to 30 °. And although a hard part may be formed over the full length, a hard part may be formed in a part of full length, and it is 0.5m thru | or 1.5m of the full length that the hard part is formed. It may be a range.

本発明の医療用輸液チューブによれば、中心軸周りの一定方向に、他の部分より可撓性が小さくて曲げ動作に対する抵抗が大きい硬質部が同じ向きに形成されていることにより、留置状態の間に患者が動いても、硬質部が外周側に位置する大きな弧状になって捩れ合った状態にはならないので、引っ張られれば真っ直ぐな状態に戻って、接続部が外れるような事故が起こり難く非常に安全性が高い。 According to the medical infusion tube of the present invention, in the fixed direction around the central axis, the indwelling state is formed in the same direction with the hard part having a smaller flexibility and a greater resistance to bending operation than the other parts. Even if the patient moves during this period, the hard part does not become twisted because it is a large arc located on the outer peripheral side, so if it is pulled it will return to a straight state and an accident will occur in which the connection part will come off It is difficult and very safe.

以下、図面を参照して本発明の実施の形態を具体的に説明する。
図３は、医療用輸液チューブを示しており、医療用の輸液の流路を形成する可撓性の合成樹脂材からなる輸液チューブ１の一端側には、図示されていない輸液バッグ等に接続される接続針２が取り付けられ、他端側には図示されていない穿刺針等が接続されるコネクタ３が取り付けられている。ただし本発明においては、輸液チューブ１の両端にどのような部材が取り付けられていても差し支えない。輸液チューブ１は、例えばポリエチレン樹脂、ポリウレタン樹脂、酢酸ビニル樹脂、軟質塩化ビニル樹脂又はそれらの混合樹脂等のような可撓性を有する高分子材料により、全長にわたり内外径が一定の円形の断面形状に形成されている。ただし、途中で径が変化していてもよく、円形以外の断面形状であっても差し支えない。Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 3 shows a medical infusion tube. One end of an infusion tube 1 made of a flexible synthetic resin material that forms a flow path for medical infusion is connected to an infusion bag (not shown). A connecting needle 2 is attached, and a connector 3 to which a puncture needle or the like (not shown) is connected is attached to the other end. However, in the present invention, any member may be attached to both ends of the infusion tube 1. The infusion tube 1 is made of a flexible polymer material such as polyethylene resin, polyurethane resin, vinyl acetate resin, soft vinyl chloride resin, or a mixed resin thereof, and has a circular cross-sectional shape with a constant inner and outer diameter over the entire length. Is formed. However, the diameter may change in the middle, and the cross-sectional shape other than circular may be used.

輸液チューブ１は、Ａ−Ａ線で切断した断面図である図１に示されるように、中心軸周りの略半周の範囲に他の部分より可撓性が小さくて曲げ動作に対する抵抗が大きい硬質部１Ａが形成されていて、残りの部分が全部非硬質部１Ｂになっている。硬質部１Ａは、中心軸周りの一定方向に同じ向き（即ち、中心軸から見て同じ方向）に、非硬質部１Ｂと硬度だけが相違する同じ材質で形成されている。したがって、硬質部１Ａと非硬質部１Ｂとは製造時に溶融されたときに境界部で一体に融合している。ただし、硬質部１Ａと非硬質部１Ｂとが同系の材質であれば融合性がよい。また、融合性がよければ、硬質部１Ａと非硬質部１Ｂとが別の材質であっても差し支えない。 As shown in FIG. 1, which is a cross-sectional view taken along the line AA, the infusion tube 1 is a hard material that is less flexible than other portions and has a high resistance to bending operation in a substantially half-circumference range around the central axis. Part 1A is formed, and the remaining part is all non-hard part 1B. The hard portion 1A is formed of the same material that differs only in hardness from the non-hard portion 1B in the same direction in the constant direction around the central axis (that is, the same direction as viewed from the central axis). Accordingly, the hard portion 1A and the non-hard portion 1B are integrally fused at the boundary when melted during manufacturing. However, if the hard part 1A and the non-hard part 1B are similar materials, the fusion is good. Further, if the fusion property is good, the hard portion 1A and the non-hard portion 1B may be made of different materials.

硬質部１Ａの硬度は、ＪＩＳ−Ｋ６２５３デュロメータータイプＡの硬度に準拠した場合に、非硬質部１Ｂの２倍以上の硬度を有している。具体的には、非硬質部１Ｂの硬度が２０°ないし３０°であるのに対して、硬質部１Ａの硬度が６０°ないし９０°の範囲であり、輸液チューブ１は全長においてそのように構成されている。その結果、コネクタ３に接続された穿刺具等が患者に穿刺された状態で長時間留置された場合に、途中で患者が動いても、曲げ動作に対する抵抗が非硬質部１Ｂより大きい硬質部１Ａが同じ向きに形成されている輸液チューブ１は、相対的に伸び難い硬質部１Ａが全体において内周側に位置する大きな弧状になって、図４に示されるような捩れ合った状態にはならないので、引っ張り力が作用するとすぐに真っ直ぐな状態に戻って、接続部が外れたり輸液状態に異常が発生するような事故が起こり難く、安全性が非常に高い。 When the hardness of the hard part 1A conforms to the hardness of JIS-K6253 durometer type A, the hardness of the hard part 1A is twice or more that of the non-hard part 1B. Specifically, the hardness of the non-hard portion 1B is 20 ° to 30 °, whereas the hardness of the hard portion 1A is in the range of 60 ° to 90 °, and the infusion tube 1 is configured as such in the entire length. Has been. As a result, when the puncture device or the like connected to the connector 3 is left in a state of being punctured by the patient for a long time, even if the patient moves in the middle, the resistance to the bending operation is higher than the non-hard portion 1B. In the infusion tube 1 formed in the same direction, the hard part 1A, which is relatively difficult to extend, has a large arc shape located on the inner peripheral side as a whole, and does not become a twisted state as shown in FIG. Therefore, when a pulling force is applied, it returns to a straight state immediately, and it is difficult to cause an accident such as disconnection or abnormal infusion state, and safety is very high.

なお、そのような特性を得るためには、硬質部１Ａが必ずしも輸液チューブ１の断面の半周に形成されている必要はなく、硬質部１Ａが輸液チューブ１の中心軸周りの四分の一周ないし四分の三の周の範囲（即ち、図２において９０°≦θ≦２７０°）に形成されていればよく、三分の一周ないし三分の二周の範囲（即ち、図２において１２０°≦θ≦２４０°）に形成されていれば、より好ましい。また、硬質部１Ａが必ずしも輸液チューブ１の全長にわたって形成されている必要もなく、例えば、輸液チューブ１の全長が１ｍないし３ｍ程度ある場合に、硬質部１Ａは、捩じれ合いが発生し易い部分を中心に全長の半分の０．５ｍないし１．５ｍの範囲に形成されていれば、捩じれ合い防止の作用効果が得られる。 In order to obtain such characteristics, the hard portion 1A does not necessarily have to be formed in the half circumference of the cross section of the infusion tube 1, and the hard portion 1A has a quarter circumference around the central axis of the infusion tube 1. It suffices if it is formed within the range of the circumference of three quarters (that is, 90 ° ≦ θ ≦ 270 ° in FIG. 2), and the range of one third to two thirds (ie, 120 ° in FIG. 2). ≦ θ ≦ 240 °) is more preferable. Further, the hard portion 1A does not necessarily have to be formed over the entire length of the infusion tube 1. For example, when the total length of the infusion tube 1 is about 1 m to 3 m, the hard portion 1A has a portion where twisting is likely to occur. If it is formed in the range of 0.5 m to 1.5 m which is half of the total length at the center, the effect of preventing twisting can be obtained.

本発明の実施の形態に係る医療用輸液チューブにおいて、図３に示されるＡ−Ａ線で切断した輸液チューブの断面図。Sectional drawing of the infusion tube cut | disconnected by the AA line shown by FIG. 3 in the medical infusion tube which concerns on embodiment of this invention. 本発明の実施の形態に係る医療用輸液チューブにおける、輸液チューブの変形例のＡ−Ａ線で切断した断面図。Sectional drawing cut | disconnected by the AA line of the modification of the infusion tube in the medical infusion tube which concerns on embodiment of this invention. 本発明の実施の形態の医療用輸液チューブの側面図。The side view of the medical infusion tube of embodiment of this invention. 従来の医療用輸液チューブが捩れ合った状態の側面図。The side view of the state where the conventional medical infusion tube twisted.

Explanation of symbols

１…輸液チューブ
１Ａ…硬質部
１Ｂ…非硬質部（他の部分）DESCRIPTION OF SYMBOLS 1 ... Infusion tube 1A ... Hard part 1B ... Non-hard part (other part)

Claims

A medical infusion tube made of a flexible synthetic resin material forming a flow path for medical infusion,
In a certain direction around the central axis, a hard part that is less flexible than other parts and has a high resistance to bending motion is formed in the same direction ,
The medical infusion tube, wherein the hard part is formed of a synthetic resin material harder than other parts .

The medical infusion tube according to claim 1, wherein the hard portion is formed of the same or similar material as other portions.

3. The medical infusion tube according to claim 1 , wherein the hard portion is formed in a range of one-fourth to three-fourths around a central axis .

The medical infusion tube according to claim 3 , wherein the hard portion is formed in a range of one third to two thirds around the central axis .

The medical infusion tube according to claim 4, wherein the hard portion is formed in a substantially half-circumferential range around a central axis .

The medical infusion tube according to any one of claims 1 to 5 , wherein when the hardness of the hard portion conforms to the hardness of JIS-K6253 durometer type A, the medical strength is twice or more that of other portions. Infusion tube.

The medical infusion tube according to claim 6 , wherein the hardness of the hard portion is 60 ° to 90 °, and the hardness of the other portion is 20 ° to 30 ° .

The medical infusion tube according to any one of claims 1 to 7 , wherein the hard portion is formed over the entire length .

The medical infusion tube in any one of Claim 1 to 7 WHEREIN: The medical infusion tube in which the said hard part is formed in a part of full length.

The medical infusion tube according to claim 9 , wherein the hard portion is formed in a range of 0.5 m to 1.5 m of the entire length .