JP4209656B2

JP4209656B2 - Catheter connector

Info

Publication number: JP4209656B2
Application number: JP2002295617A
Authority: JP
Inventors: 英也斉藤; 哲朗岡野
Original assignee: Fukoku Co Ltd; Unisis Corp
Current assignee: Fukoku Co Ltd; Unisis Corp
Priority date: 2002-10-09
Filing date: 2002-10-09
Publication date: 2009-01-14
Anticipated expiration: 2022-10-09
Also published as: JP2004129741A

Description

【０００１】
【発明の属する技術分野】
本発明は、硬膜外麻酔用留置カテーテルなどに使用するコネクタに関する。
【０００２】
【従来の技術】
硬膜外麻酔の場合、抵抗消失法や懸滴法などを用いて穿刺した硬膜外針からカテーテルを硬膜外腔に挿入する。カテーテルの後端にはコネクタを接続し、コネクタにさらに注射器などの器具を接続して薬液を硬膜外腔に注入する。薬液は適時に注入されるが、注入を行わないときはコネクタをテープで皮膚に固定しておく。
【０００３】
図５〜８は株式会社ユニシス製の従来のコネクタ２１に関し、図５はコネクタ２１の断面図、図６はパッキン２７の断面図、図７はＡ部材２２を内端側から見た図、図８はＢ部材２３を内端側から見た図である。
【０００４】
コネクタ２１はＡ部材２２とＢ部材２３からなる。Ａ部材２２はプラスチックで概略砲弾形に形成され、中央にカテーテル２０を挿通する貫通孔２４を有し、内部にゴムなどの弾性体でなるパッキン２７が装着され、その後ろ側はＢ部材２３を装着するための空所である装着部２６が形成され、その内周面には螺条２５（雌ねじ）が形成されている。貫通孔２４の先端はカテーテルを挿入するための挿入口２４ａとしてＡ部材２２の線端面に開口している。Ｂ部材２３はプラスチックで概略筒状に形成され、中央にカテーテル２０を挿通する貫通孔２４を有し、内端部外周にはＡ部材２２の装着部２６に装着するための螺条２８（雄ねじ）が形成されている。貫通孔２４の後端側は狭窄部３０となっており、その後側は薬液注入部２９となっている。薬液注入部２９は着脱自在のキャップ（図示せず）で閉塞することができる。また、Ｂ部材２３の外周面には４枚の羽根３１が形成され、Ｂ部材をＡ部材に螺合しやすくなっている。図５に示すように、Ｂ部材はＡ部材の内端面に開口している前記装着部２６に内端部をねじ込むことでＡ部材と結合する。図６に示すように、パッキン２７は円筒状をなし、その先端側はテーパ状にやや尖った形状で、全長に亘って中央に貫通孔３２が設けられている。カテーテルは図６の矢印方向から挿通される。
【０００５】
Ａ部材２２とＢ部材２３とを緩く螺合した状態（パッキン２７が圧縮されていない状態）で、カテーテル２０をＡ部材の挿入口２４ａから貫通孔２４に、さらにパッキン２７の貫通孔３２に挿通する。カテーテルの先端は狭窄部３０に至るとそれ以上前進できなくなる。次に、Ｂ部材をＡ部材に対して回転させてねじ込むと、パッキン２７はＡ部材とＢ部材とに押圧圧縮され、貫通孔３２の径が収縮してカテーテルを固定する。そして、薬液注入部２９に注射器などの器具を接続して薬液をカテーテル２０に注入する。薬液は適時に注入されるが、注入を行わないときはコネクタ２１をテープで皮膚に固定しておく。
【０００６】
【発明が解決しようとする課題】
従来のコネクタは、ＡＢ両部材とも内端側の外形が円形であるので、螺合した両部材の締め付け具合が分かりにくかった。すなわち、締め付けすぎるとカテーテルが潰れて薬液の注入に支障を来し、締め付けが不足するとカテーテルの固定が不十分でカテーテルが脱落する事故が生じる。また、適正に締め付けることができても、施術中にＡＢ両部材の締め付けが緩んでカテーテルが脱落する可能性があり、締め付けが緩んだことを発見しずらいという問題があった。本発明はこれらの問題点を解決するためになされたものである。すなわち本発明の課題は、▲１▼ カテーテルを必要以上に締め付けない、▲２▼ カテーテルを確実に固定する、▲３▼ ＡＢ両部材の締め付けが緩みにくい、▲４▼ 万一緩んでも容易に判明する、コネクタを開発することである。
【０００７】
【課題を解決するための手段】
本発明は、カテーテル（２０）を挿通する貫通孔（４）とこれに連通する薬液注入部（９）を有し、相互に螺合する螺条（５、８）を有するＡ部材（２）とＢ部材（３）とに分割され、前記貫通孔（４）のカテーテル挿入口と前記薬液注入部（９）はそれぞれＡ又はＢの別々の部材にあって、Ａ又はＢのいずれかの部材にカテーテル（２０）を挿通する貫通孔（１１）を有するパッキン（７）を装着し、前記貫通孔（４）のカテーテル挿入口から前記パッキン（７）の貫通孔（１１）にカテーテル（２０）を挿入後、前記Ａ部材（２）とＢ部材（３）とを螺合して該ＡＢ両部材（２、３）で前記パッキン（７）を押圧圧縮することでカテーテル（２０）を固定し、前記薬液注入部（９）に注射器などを接続してカテーテルに薬液を供給するカテーテルのコネクタにおいて、前記パッキン（７）が概略円筒形をなし、その両端面の中央部から小径の円筒状の突出部（１２、１３）が突出形成され、前記貫通孔が一方の突出部から反対側の突出部まで中心を貫いて形成されていることを特徴とするカテーテルのコネクタある。
また本発明は、上記のコネクタにおいて、前記ＡＢ両部材（２、３）の相対する内端面（１４、１５）の外形を非円形のほぼ同一形状とすると共に、該内端面（１４、１５）に相互に凹凸係合しあう係合部（１７）を設け、ＡＢ両部材（２、３）を螺合して両部材の内端面（１４、１５）の外形が一致したときに前記係合部（１７）が相互に係合することを特徴とするカテーテルのコネクタである。
さらに本発明は、上記のコネクタにおいて、前記係合部（１７）が相互に係合したときに、前記パッキン（７）が適度に押圧圧縮されてカテーテルを適性に固定することを特徴とするカテーテルのコネクタである。
【０００８】
パッキンの形状を、概略円筒形とし、その両端面の中央部から本体よりも小径の円筒状の突出部を突出形成した形状とし、貫通孔を、一方の突出部から反対側の突出部まで中心を貫いて形成したので、パッキンを押圧圧縮した場合、貫通孔が収縮してカテーテルを締め付ける圧力がパッキン全長に亘って均一化し、カテーテルが潰れにくく、かつ、確実に固定できるようになる。
【０００９】
また本発明のコネクタは上記の構成であるので、Ａ部材にＢ部材をねじ込んで両部材の内端面の外形が一致したときに係合部が相互に係合し、それ以上ねじ込むことに抵抗を生じると共に、緩みにくく、両部材の内端面の外形が一致しているために目でも容易に確認でき、万一締め付けが緩んでも容易に判明する。したがって、係合部が相互に係合したときに、パッキンが適度に押圧圧縮されてカテーテルを適性に固定するようにしておけば、前記の課題を達成することができる。

【００１０】
【発明の実施の形態】
以下、実施例を表した図面に基づいて本発明を詳細に説明する。図１は実施例のコネクタ１の断面図、図２はパッキン７の断面図、図３はＢ部材３を内端側から見た図、図４はＡ部材２を内端側から見た図である。
【００１１】
コネクタ１はＡ部材２とＢ部材３からなる。ＡＢ両部材はプラスチック製で断面が扁平な楕円状に形成され、図３、４に示すように、それぞれの内端面１４、１５の外形は同一形状（扁平な楕円形）となっている。Ａ部材２は、中央に竿状部６がその回りをくりぬくことで形成され、その中央にはカテーテル２０を挿通する貫通孔４が形成されている。竿状部６の外周には螺条５が形成されている。Ａ部材２の内端面１４には係合部１７を構成する凹部１７ａが設けられている。
【００１２】
Ｂ部材３は中央に円筒状の筒状部１０がその内端面１５から突出するように形成され、その内周面には螺条８が形成されている。筒状部１０にはパッキン７が装着され、その後ろ側は狭窄部１６となっている。さらにその後ろ側はパッキン７の貫通孔１１に連通する薬液注入部９となっている。薬液注入部９の後端は着脱自在のキャップ１８が設けられている。Ｂ部材３の内端面１５には係合部１７を構成する凸部１７ｂが設けられている。
【００１３】
竿状部６の螺条５と筒状部１０の螺条８を螺合することでＡ部材２にＢ部材３をねじ込み、図１に示すように、ＡＢ両部材の内端面１４、１５の外形が一致すると係合部１７（凹部１７ａ、凸部１７ｂ）が凹凸係合する。このときパッキン７はＡＢ両部材によって適度に押圧圧縮される。
【００１４】
Ａ部材２とＢ部材３とを緩く螺合した状態（パッキン７が圧縮されていない状態）で、カテーテル２０をＡ部材の先端側から貫通孔４に、さらにパッキン７の貫通孔１１に挿通する。カテーテルの先端は狭窄部１６に至るとそれ以上前進できなくなる。次に、Ｂ部材をＡ部材に対して回転させて、ＡＢ両部材の内端面１４、１５の形状が一致し係合部１７（凹部１７ａ、凸部１７ｂ）が凹凸係合するまでねじ込む。このときパッキン７はＡＢ両部材によって適度に押圧圧縮されるので、カテーテル２０は潰れることなく確実にコネクタ１に固定される。係合部１７が係合しているので、ＡＢ両部材が緩みにくく、したがってカテーテルが外れることがなく、万一緩んだ場合はＡＢ両部材の内端面１４、１５の外形が一致せずにずれるため一見して容易に判明する。その上、コネクタ１は扁平な楕円状の断面を有する平たい小判形であるので、薬液の注入を行わないときはコネクタ１をテープで皮膚に容易確実に固定できる。
【００１５】
図２に示すように、ゴムなどの弾性体でなるパッキン７は円筒形の本体と、その両端面の中央部から本体よりも小径の円筒形の突出部１２、１３を同芯状に（軸芯を一致させて）突出形成した形状となっている。突出部１２、１３の突出長さはほぼ同じである。貫通孔１１は一方の突出部から反対側の突出部まで中心を貫いて形成されている。カテーテルは矢印方向から挿通される。
【００１６】
図６に示す従来のパッキン２７を押圧圧縮すると、貫通孔３２が収縮してカテーテルを締め付ける圧力（面圧）は、貫通孔３２の両端付近のきわめて狭い範囲に発生し、中央部の広い範囲にはほとんど面圧が発生しない。このように、従来の形状のパッキンの面圧分布は両端部に偏って発生するために、締め付けすぎるとパッキン端部でカテーテルが潰れやすく、また、カテーテルを潰さないように締め付けを加減すると全体としての締め付け力が小さくなってカテーテルが外れやすい、すなわち、適度な締め付けとするのが容易でない。一方、図２に示す本発明におけるパッキン７は、面圧がパッキンの長さ方向にほぼ均一に分布する。したがって、パッキンを押圧圧縮した場合に適度な締め付けの範囲が広くなり、容易に適度な締め付けとすることができるから、カテーテルが潰れにくく、かつ、確実に固定できるようになる。
【００１７】
上記の実施例は本発明の一例であって、特許請求の範囲に記載されていない事項については適宜変更することができる。例えば、コネクタの全体形状は小判形である必要はなく、円形、多角形など任意である。また、断面形状や内端面の形状は楕円形に限らず長円形、四辺形などとすることができるが、なるべく扁平な形状とするのが、締め付けの緩みを発見しやすく、またテープで皮膚に固定しやすいので好適である。パッキンはＢ部材に限らず、Ａ部材に装着することもできる。
【００１８】
【発明の効果】
本発明のコネクタは、▲１▼ カテーテルを必要以上に締め付けることがなく、▲２▼カテーテルを確実に固定でき、▲３▼ ＡＢ両部材の締め付けが緩みにくく、▲４▼ 万一緩んでも容易に判明するものである。
【図面の簡単な説明】
【図１】実施例のコネクタ１の断面図である。
【図２】パッキン７の断面図である。
【図３】Ｂ部材３を内端側から見た図である。
【図４】Ａ部材２を内端側から見た図である。
【図５】従来のコネクタ２１の断面図である。
【図６】パッキン２７の断面図である。
【図７】Ａ部材２２を内端側から見た図である。
【図８】Ｂ部材２３を内端側から見た図である。
【符号の説明】
１コネクタ
２Ａ部材
３Ｂ部材
４貫通孔
５螺条
６竿状部
７パッキン
８螺条
９薬液注入部
１０筒状部
１１貫通孔
１２突出部
１３突出部
１４内端面
１５内端面
１６狭窄部
１７係合部
１８キャップ
２０カテーテル
２１コネクタ
２２Ａ部材
２３Ｂ部材
２４貫通孔
２５螺条
２６装着部
２７パッキン
２８螺条
２９薬液注入部
３０狭窄部
３１羽根
３２貫通孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector used for an indwelling catheter for epidural anesthesia.
[0002]
[Prior art]
In the case of epidural anesthesia, a catheter is inserted into the epidural space from an epidural needle that has been punctured using the resistance disappearance method or the hanging drop method. A connector is connected to the rear end of the catheter, and an instrument such as a syringe is further connected to the connector to inject the drug solution into the epidural space. The drug solution is injected in a timely manner, but when the injection is not performed, the connector is fixed to the skin with tape.
[0003]
5 to 8 are related to a conventional connector 21 manufactured by Unisys Corporation, FIG. 5 is a cross-sectional view of the connector 21, FIG. 6 is a cross-sectional view of the packing 27, and FIG. 7 is a view of the A member 22 as viewed from the inner end side. 8 is a view of the B member 23 as seen from the inner end side.
[0004]
The connector 21 includes an A member 22 and a B member 23. The A member 22 is made of plastic and has a substantially bullet-like shape. The A member 22 has a through-hole 24 through which the catheter 20 is inserted in the center, and a packing 27 made of an elastic material such as rubber is attached to the inside thereof. A mounting portion 26 which is a space for mounting is formed, and a thread 25 (female screw) is formed on the inner peripheral surface thereof. The distal end of the through hole 24 opens on the line end surface of the A member 22 as an insertion port 24a for inserting a catheter. The B member 23 is made of plastic and has a substantially cylindrical shape. The B member 23 has a through-hole 24 through which the catheter 20 is inserted at the center. ) Is formed. The rear end side of the through hole 24 is a narrowed portion 30, and the rear side is a chemical solution injection portion 29. The chemical injection part 29 can be closed with a removable cap (not shown). Further, four blades 31 are formed on the outer peripheral surface of the B member 23 so that the B member can be easily screwed into the A member. As shown in FIG. 5, the B member is coupled to the A member by screwing the inner end portion into the mounting portion 26 that opens to the inner end surface of the A member. As shown in FIG. 6, the packing 27 has a cylindrical shape, and the tip side thereof has a slightly tapered shape, and a through hole 32 is provided at the center over the entire length. The catheter is inserted from the direction of the arrow in FIG.
[0005]
In a state where the A member 22 and the B member 23 are loosely screwed (the packing 27 is not compressed), the catheter 20 is inserted from the insertion port 24a of the A member into the through hole 24 and further into the through hole 32 of the packing 27. To do. When the tip of the catheter reaches the stenosis 30, it can no longer be advanced. Next, when the B member is rotated with respect to the A member and screwed in, the packing 27 is pressed and compressed by the A member and the B member, and the diameter of the through hole 32 is contracted to fix the catheter. Then, an instrument such as a syringe is connected to the drug solution injection unit 29 to inject the drug solution into the catheter 20. The chemical solution is injected in a timely manner, but when the injection is not performed, the connector 21 is fixed to the skin with a tape.
[0006]
[Problems to be solved by the invention]
In the conventional connector, since both the AB members have a circular outer shape on the inner end side, it is difficult to understand the tightening condition of the screwed members. That is, if the catheter is tightened too much, the catheter will be crushed and the injection of the chemical solution will be hindered. If the clamping is insufficient, the catheter will be insufficiently fixed and the catheter will fall off. In addition, even if it can be properly tightened, there is a possibility that the AB members are loosened during the treatment and the catheter may fall off, and it is difficult to find that the tightening is loose. The present invention has been made to solve these problems. That is, the problems of the present invention are as follows: (1) Do not tighten the catheter more than necessary, (2) Securely fix the catheter, (3) It is difficult to loosen both AB members, (4) Easily become clear even if it is loosened To develop a connector.
[0007]
[Means for Solving the Problems]
The present invention has an A member (2) having a through hole (4) through which a catheter (20) is inserted and a chemical solution injection part (9) communicating with the through hole (4), and having threads (5, 8) screwed together. And the B member (3), the catheter insertion port of the through hole (4) and the drug solution injection part (9) are respectively in separate members A or B, and either member A or B A packing (7) having a through hole (11) through which the catheter (20) is inserted is attached to the catheter (20), and the catheter (20) is inserted into the through hole (11) of the packing (7) from the catheter insertion port of the through hole (4). Then, the A member (2) and the B member (3) are screwed together, and the packing (7) is pressed and compressed by the AB members (2, 3) to fix the catheter (20). A cartridge is connected to the drug injection part (9) to supply a drug solution to the catheter. The connector ether, the packing (7) is substantially a cylindrical small diameter cylindrical protrusion (12, 13) is protruded from the center portion of both end faces thereof, the through hole is from one of the projecting portions A catheter connector characterized by being formed through the center to the opposite protrusion .
Further, according to the present invention, in the connector described above, the outer end faces (14, 15) of the AB members (2, 3) facing each other have substantially the same non-circular shape, and the inner end faces (14, 15). An engaging portion (17) that engages with each other is provided on the upper and lower sides, and when both the AB members (2, 3) are screwed together and the outer shapes of the inner end surfaces (14, 15) of both members coincide, A catheter connector characterized in that the parts (17) engage with each other.
Furthermore, the present invention provides the above-mentioned connector, wherein when the engaging portions (17) are engaged with each other, the packing (7) is appropriately pressed and compressed to fix the catheter appropriately. Connector.
[0008]
The shape of the packing is a substantially cylindrical shape, with a cylindrical protruding part with a smaller diameter than the main body protruding from the center of both end faces, and the through hole is centered from one protruding part to the protruding part on the opposite side When the packing is pressed and compressed, the through hole contracts and the pressure for tightening the catheter is uniform over the entire length of the packing, and the catheter is not easily crushed and can be fixed securely.
[0009]
In addition, since the connector of the present invention has the above-described configuration, when the B member is screwed into the A member and the outer end surfaces of both members coincide with each other, the engaging portions engage with each other, and resistance to further screwing is obtained. As it occurs, it is difficult to loosen, and since the outer shapes of the inner end surfaces of both members are matched, it can be easily confirmed with the eyes, and even if the tightening is loosened, it is easily found. Therefore, when the engaging portions are engaged with each other, the above-described problem can be achieved if the packing is appropriately pressed and compressed to fix the catheter appropriately.

[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing examples. 1 is a cross-sectional view of the connector 1 of the embodiment, FIG. 2 is a cross-sectional view of the packing 7, FIG. 3 is a view of the B member 3 seen from the inner end side, and FIG. 4 is a view of the A member 2 seen from the inner end side. It is.
[0011]
The connector 1 includes an A member 2 and a B member 3. Both members AB are made of plastic and are formed in an elliptical shape with a flat cross section. As shown in FIGS. 3 and 4, the outer end surfaces 14 and 15 have the same outer shape (flat elliptical shape). The A member 2 is formed by hollowing out the periphery of the hook-shaped portion 6 at the center, and a through hole 4 through which the catheter 20 is inserted is formed at the center. A thread 5 is formed on the outer periphery of the bowl-shaped portion 6. The inner end surface 14 of the A member 2 is provided with a concave portion 17 a that constitutes the engaging portion 17.
[0012]
The B member 3 is formed at the center so that a cylindrical tubular portion 10 protrudes from the inner end surface 15 thereof, and a thread 8 is formed on the inner peripheral surface thereof. A packing 7 is attached to the cylindrical portion 10, and a constricted portion 16 is formed on the rear side thereof. Further, the rear side is a chemical solution injection portion 9 communicating with the through hole 11 of the packing 7. A detachable cap 18 is provided at the rear end of the chemical liquid injector 9. On the inner end surface 15 of the B member 3, a convex portion 17 b constituting the engaging portion 17 is provided.
[0013]
The B member 3 is screwed into the A member 2 by screwing the screw 5 of the hook-like portion 6 and the screw 8 of the cylindrical portion 10, and as shown in FIG. When the outer shapes match, the engaging portion 17 (concave portion 17a, convex portion 17b) engages with the concave and convex portions. At this time, the packing 7 is appropriately pressed and compressed by the AB members.
[0014]
In a state where the A member 2 and the B member 3 are loosely screwed (the packing 7 is not compressed), the catheter 20 is inserted from the distal end side of the A member into the through hole 4 and further into the through hole 11 of the packing 7. . When the distal end of the catheter reaches the stenosis 16, it cannot advance further. Next, the B member is rotated with respect to the A member, and is screwed in until the shapes of the inner end faces 14 and 15 of both the AB members match and the engaging portions 17 (concave portions 17a and convex portions 17b) engage with each other. At this time, since the packing 7 is appropriately pressed and compressed by both AB members, the catheter 20 is securely fixed to the connector 1 without being crushed. Since the engaging portion 17 is engaged, both the AB members are not easily loosened, so that the catheter is not detached. In the unlikely event, the outer shapes of the inner end faces 14 and 15 of the AB both members are not matched. Therefore, it is easily found at first glance. In addition, since the connector 1 has a flat oval shape with a flat elliptical cross section, the connector 1 can be easily and securely fixed to the skin with a tape when no chemical solution is injected.
[0015]
As shown in FIG. 2, the packing 7 made of an elastic body such as rubber has a cylindrical main body and cylindrical protrusions 12 and 13 having a diameter smaller than that of the main body from the center of both end faces thereof. It has a shape that protrudes by matching the cores. The protruding lengths of the protruding portions 12 and 13 are substantially the same. The through hole 11 is formed through the center from one protrusion to the opposite protrusion. The catheter is inserted from the direction of the arrow.
[0016]
When the conventional packing 27 shown in FIG. 6 is pressed and compressed, the pressure (surface pressure) at which the through-hole 32 contracts and clamps the catheter is generated in a very narrow range near both ends of the through-hole 32 and in a wide range at the center. There is almost no surface pressure. As described above, since the surface pressure distribution of the conventional packing is biased toward both ends, the catheter tends to be crushed at the end of the packing if tightened too much. The tightening force becomes small and the catheter is likely to come off, that is, it is not easy to achieve proper tightening. On the other hand, in the packing 7 according to the present invention shown in FIG. 2, the surface pressure is distributed almost uniformly in the length direction of the packing. Therefore, when the packing is pressed and compressed, an appropriate tightening range is widened and the appropriate tightening can be easily performed. Therefore, the catheter is not easily crushed and can be reliably fixed.
[0017]
The above embodiment is an example of the present invention, and matters not described in the claims can be changed as appropriate. For example, the overall shape of the connector does not need to be an oval shape, and may be any shape such as a circle or a polygon. In addition, the cross-sectional shape and the shape of the inner end face are not limited to an ellipse, but can be an oval, a quadrilateral, etc. It is suitable because it is easy to fix. The packing can be attached not only to the B member but also to the A member.
[0018]
【The invention's effect】
The connector of the present invention (1) does not tighten the catheter more than necessary, (2) can securely fix the catheter, (3) it is difficult to loosen the AB members, and (4) easily even if it is loosened. It turns out.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a connector 1 according to an embodiment.
FIG. 2 is a cross-sectional view of packing 7;
FIG. 3 is a view of a B member 3 as viewed from the inner end side.
FIG. 4 is a view of an A member 2 as viewed from the inner end side.
5 is a cross-sectional view of a conventional connector 21. FIG.
6 is a cross-sectional view of packing 27. FIG.
FIG. 7 is a view of the A member 22 as viewed from the inner end side.
FIG. 8 is a view of the B member 23 as seen from the inner end side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connector 2 A member 3 B member 4 Through-hole 5 Screw 6 Gutter-shaped part 7 Packing 8 Screw 9 Screw part 10 Cylindrical part 11 Through-hole 12 Projection part 13 Projection part 14 Inner end surface 15 Inner end surface 16 Narrow part 17 Engagement part 18 Cap 20 Catheter 21 Connector 22 A member 23 B member 24 Through hole 25 Screw 26 Mounting part 27 Packing 28 Screw 29 Chemical solution injection part 30 Narrow part 31 Blade 32 Through hole

Claims

An A member (2) and a B member (having a through hole (4) through which the catheter (20) is inserted and a chemical liquid injection part (9) communicating with the through hole (4) and having screw threads (5, 8) screwed together. 3), the catheter insertion port of the through-hole (4) and the drug solution injection part (9) are respectively in separate members A or B, and the catheter (20 ) Is inserted, and the catheter (20) is inserted into the through hole (11) of the packing (7) from the catheter insertion port of the through hole (4). The A member (2) and the B member (3) are screwed together and the packing (7) is pressed and compressed by the AB members (2, 3) to fix the catheter (20), and the drug solution injection Of the catheter that supplies a liquid medicine to the catheter by connecting a syringe or the like to the section (9) In the connector,
The packing (7) has a substantially cylindrical shape, and cylindrical projections (12, 13) having small diameters project from the central portions of both end faces thereof, and the through hole is a projection on the opposite side from one projection. Catheter connector characterized by being formed through the center

2. The connector according to claim 1, wherein the outer end faces (14, 15) of the AB members (2, 3) facing each other have substantially the same non-circular shape, and are mutually connected to the inner end faces (14, 15). An engaging portion (17) that engages with the concave and convex portions is provided, and when the AB both members (2, 3) are screwed together and the outer shapes of the inner end surfaces (14, 15) of both members coincide with each other, the engaging portion (17 ) Are engaged with each other.

The connector according to claim 2 , wherein when the engaging portions (17) are engaged with each other, the packing (7) is appropriately pressed and compressed to fix the catheter appropriately.