JP6864838B2

JP6864838B2 - Medical stopcock

Info

Publication number: JP6864838B2
Application number: JP2018502989A
Authority: JP
Inventors: 裕之中神; 慎吾阪本; 一樹松本
Original assignee: Nipro Corp
Current assignee: Nipro Corp
Priority date: 2016-03-02
Filing date: 2017-02-09
Publication date: 2021-04-28
Anticipated expiration: 2037-02-09
Also published as: JP2021104367A; WO2017150125A1; JPWO2017150125A1

Description

本開示は医療用活栓に関し、特に薬液の注入に用いることができる医療用活栓に関する。 The present disclosure relates to a medical stopcock, and particularly to a medical stopcock that can be used for injecting a drug solution.

輸液回路及び血液回路等の医療用回路に、流路を切り換えるための三方活栓等の医療用活栓が接続されている場合がある。三方活栓を接続することにより、例えば、点滴等の際に、主流路を流れる薬液に側流路から別の薬液を容易に導入することができる。 A medical stopcock such as a three-way stopcock for switching the flow path may be connected to a medical circuit such as an infusion circuit and a blood circuit. By connecting a three-way stopcock, for example, another chemical solution can be easily introduced into the chemical solution flowing through the main flow path from the side flow path at the time of infusion or the like.

一般的な三方活栓は、直線的に配置された第１の管路及び第２の管路と、これに交差する方向に配置された第３の管路とを有している。３つの管路は円筒形の本体に接続され、本体の内側には円柱状の栓体が回転可能に挿入されている。栓体には内部を貫通するＴ字状の流通孔が設けられており、栓体を回転させて流通孔の位置を調整することにより、３つの管路の間を流通状態にしたり、遮断状態にしたりすることができる（例えば、特許文献１を参照。）。 A general three-way stopcock has a first line and a second line arranged linearly, and a third line arranged in a direction intersecting the first line. The three conduits are connected to a cylindrical body, and a cylindrical plug is rotatably inserted inside the body. The plug body is provided with a T-shaped flow hole that penetrates the inside, and by rotating the plug body to adjust the position of the flow hole, the flow state between the three pipelines can be set or blocked. (See, for example, Patent Document 1).

しかし、このような三方活栓は、栓体を貫通するＴ字状の流通孔によってデッドスペースが生じるため、例えば第３の管路から注入した薬液の一部がデッドスペースに滞留してしまう。 However, in such a three-way stopcock, a dead space is created by a T-shaped flow hole penetrating the stopcock body, so that, for example, a part of the chemical solution injected from the third conduit stays in the dead space.

薬液の滞留を防止することを目的として、栓体の外周面に溝を設け、第１の管路からの薬液により第３の管路をフラッシングする構成の三方活栓が検討されている（例えば、特許文献２を参照。）。 For the purpose of preventing the retention of the chemical solution, a three-way stopcock having a structure in which a groove is provided on the outer peripheral surface of the stopper and the third conduit is flushed with the chemical solution from the first conduit is being studied (for example, See Patent Document 2).

しかし、栓体の外周面に溝部を設けた場合においても、第３管路の本体側の部分にしか薬液が流れず、第３管路全体をフラッシングすることは困難である。このため、薬液の滞留を解消する効果が十分ではない。三方活栓に限らず他の医療用活栓についても同様である。 However, even when the groove portion is provided on the outer peripheral surface of the plug body, the chemical solution flows only to the portion on the main body side of the third pipeline, and it is difficult to flush the entire third pipeline. Therefore, the effect of eliminating the retention of the chemical solution is not sufficient. The same applies not only to three-way stopcocks but also to other medical stopcocks.

そこで、薬液の滞留を防止することを目的として、第３の管路内に隔壁を設け、第１の管路から流れてきた薬液や血液が隔壁を乗り越えて、第２の管路に流れるような構成の三方活栓が検討されている（例えば、特許文献３を参照。）。 Therefore, for the purpose of preventing the accumulation of the chemical solution, a partition wall is provided in the third conduit so that the drug solution and blood flowing from the first conduit can pass over the partition wall and flow into the second conduit. A three-way stopcock having a different configuration has been studied (see, for example, Patent Document 3).

特開２００５−０４６３４９号公報Japanese Unexamined Patent Publication No. 2005-046349 特開２００８−５１１３７１号公報Japanese Unexamined Patent Publication No. 2008-511371 特開２０１０−１４２４３８号公報Japanese Unexamined Patent Publication No. 2010-142438

しかしながら、従来の三方活栓は、第１の管路から第２の管路に流れる薬液等が隔壁を乗り越えなければ、第１の管路から第２の管路に流れることができない。このため、隔壁によって薬液の流れが一旦堰き止められ、第２の管路への流量が減少してしまい、第２の管路の末端に接続されたカテーテル等を通して、患者の体内に薬液を十分に投与することができないという問題がある。 However, in the conventional three-way stopcock, the chemical solution or the like flowing from the first pipe to the second pipe cannot flow from the first pipe to the second pipe unless it gets over the partition wall. For this reason, the flow rate of the drug solution is temporarily blocked by the partition wall, the flow rate to the second pipeline is reduced, and the drug solution is sufficiently supplied into the patient's body through a catheter or the like connected to the end of the second pipeline. There is a problem that it cannot be administered to.

本開示の課題は、管路内における薬液の滞留が生じにくく、第２の管路へ流れる薬液等の流量が減少しにくい医療用活栓を実現できるようにすることである。 An object of the present disclosure is to make it possible to realize a medical stopcock in which the chemical solution is less likely to stay in the pipeline and the flow rate of the chemical solution or the like flowing into the second pipeline is less likely to decrease.

医療用活栓の一態様は、円筒状の本体と、本体の側面に周方向に互いに間隔をおいてそれぞれ接続された第１管路、第２管路及び第３管路と、本体の内周面により外周面が支持され、本体に対して相対的に回転可能な柱状の栓体とを備え、第３管路は、第３管路内を区画する隔壁を有し、栓体は、その外周面に設けられた溝部を有し、第１管路と第２管路とは、栓体を前記第１の位置とした際に、溝部と本体の内壁面とにより構成され、第１管路と第３管路とを接続する第１流路と、溝部と本体の内壁面とにより構成され、第２管路と第３管路とを接続する第２流路と、隔壁の外周面と第３管路の内壁面とにより構成され、第１流路と第２流路とを接続する第３流路と、溝部と隔壁の本体側の端面とにより構成され、第１流路と第２流路とを接続する第４流路とにより接続される。 One aspect of the medical activation plug is a cylindrical main body, a first pipe line, a second pipe line and a third pipe line connected to the side surface of the main body at intervals in the circumferential direction, and an inner circumference of the main body. The outer peripheral surface is supported by the surface, and a columnar plug body that is rotatable relative to the main body is provided. It has a groove provided on the outer peripheral surface, and the first pipe and the second pipe are composed of the groove and the inner wall surface of the main body when the plug body is set to the first position, and the first pipe is formed. The first flow path connecting the road and the third pipeline, the second flow path which is composed of the groove and the inner wall surface of the main body and connects the second pipeline and the third pipeline, and the outer peripheral surface of the partition wall. And the inner wall surface of the third pipeline, the third flow path connecting the first flow path and the second flow path, and the groove portion and the end surface of the partition wall on the main body side, and the first flow path. It is connected by a fourth flow path that connects to the second flow path.

このような構成とすることにより、栓体の第１の位置において、第３流路だけでなく第４流路によっても第１管路と第２管路とが接続されるため、第１管路から第２管路への流量減少を防止できる。また、第３流路を流れる液により第３管路を十分にフラッシングすることも可能となる。 With such a configuration, at the first position of the plug, the first pipe and the second pipe are connected not only by the third flow path but also by the fourth flow path, so that the first pipe It is possible to prevent a decrease in the flow rate from the road to the second pipeline. In addition, the liquid flowing through the third flow path can sufficiently flush the third pipeline.

医療用活栓の一態様において、栓体を第１の位置とした場合に、溝部における第１流路となる部分の延長線は、隔壁の第１管路側の側面に達し、溝部における第２の流路となる部分の延長線は、隔壁の第２管路側の側面に達するようにしてもよい。また、栓体を第１の位置とした場合に、溝部における第１流路となる部分は、隔壁と交差する方向に延びていてもよい。このようにすることにより、第１流路と第２流路との間において、薬液をさらに滞留しにくくすることができる。 In one aspect of the medical stopcock, when the stopcock is in the first position, the extension line of the portion that becomes the first flow path in the groove reaches the side surface of the partition wall on the first conduit side, and the second in the groove. The extension line of the portion serving as the flow path may reach the side surface of the partition wall on the second pipeline side. Further, when the plug body is set to the first position, the portion of the groove portion that becomes the first flow path may extend in the direction intersecting the partition wall. By doing so, it is possible to make it more difficult for the chemical solution to stay between the first flow path and the second flow path.

医療用活栓の一態様において、第３流路は、第１管路側の第１の部分と第２管路側の第２部分とを有し、栓体を第１の位置とした場合に、溝部における第１流路となる部分の第３管路側の端部は、第３流路の第１の部分を本体内に延長した範囲内に位置するようにしてもよい。このような構成とすることにより第１流路から第３流路へ液が十分に流れるようにすることができる。 In one aspect of a medical stopcock, the third flow path has a first portion on the first conduit side and a second portion on the second conduit side, and when the stopcock is in the first position, the groove portion The end portion of the portion serving as the first flow path on the third pipeline side may be located within a range in which the first portion of the third flow path is extended in the main body. With such a configuration, the liquid can be sufficiently flowed from the first flow path to the third flow path.

医療用活栓の一態様において、第３管路は、本体側に向かって次第に内径が小さくなる縮径部を有していてもよい。縮径部を設けることにより、第３管路内に段差が生じず、薬液の滞留をより生じにくくすることができる。 In one aspect of a medical stopcock, the third conduit may have a reduced diameter portion whose inner diameter gradually decreases toward the main body side. By providing the reduced diameter portion, a step is not generated in the third pipeline, and it is possible to make it more difficult for the chemical solution to stay.

医療用活栓の一態様において、溝部の幅は、第３管路における本体側の端部の幅以上としてもよい。このような構成とすることにより、第３管路を十分にフラッシングすることが可能となる。この場合、溝部の幅は１．５ｍｍ以上、４．０ｍｍ以下とすることができる。 In one aspect of the medical stopcock, the width of the groove may be equal to or greater than the width of the end on the main body side in the third pipeline. With such a configuration, it is possible to sufficiently flush the third pipeline. In this case, the width of the groove can be 1.5 mm or more and 4.0 mm or less.

医療用活栓の一態様において、第３管路は、本体と反対側の端部からオスコネクタを挿入可能であり、挿入されたオスコネクタの先端は、隔壁の端面と当接するようにしてもよい。これにより、隔壁がオスコネクタの挿入深さを制限するストッパとなり、オスコネクタの接続が容易となると共に、弁体の脱落を生じにくくすることができる。 In one aspect of the medical stopcock, the male connector can be inserted into the third conduit from the end opposite to the main body, and the tip of the inserted male connector may be brought into contact with the end face of the partition wall. .. As a result, the partition wall serves as a stopper that limits the insertion depth of the male connector, facilitating the connection of the male connector and preventing the valve body from falling off.

医療用活栓の一態様において、第１管路は本体側に向かって縮径していてもよい。このような構成とすることにより、第１管路における液の滞留を少なくすることができる。 In one aspect of the medical stopcock, the first conduit may be reduced in diameter toward the main body. With such a configuration, it is possible to reduce the retention of the liquid in the first pipeline.

医療用活栓の一態様において、第１の位置において、第１流路の外側端部は、第１管路の端部下面よりも低い位置となるように設けられていてもよい。このような構成とすることにより、位置合わせのずれが生じた場合にも第１の管路における液の滞留が生じにくくすることができる。 In one aspect of the medical stopcock, the outer end of the first flow path may be provided at a position lower than the lower surface of the end of the first pipeline at the first position. With such a configuration, it is possible to prevent the liquid from staying in the first pipeline even when the alignment is misaligned.

本開示の医療用活栓によれば、管路内における薬液の滞留を生じにくくすることができる。 According to the medical stopcock of the present disclosure, it is possible to prevent the drug solution from staying in the pipeline.

図１は一実施形態に係る医療用活栓を示す斜視図である。FIG. 1 is a perspective view showing a medical stopcock according to an embodiment. 図２は図１のII−II線における断面図である。FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 図３は図２のIII−III線における断面図である。FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 図４は栓体が第１の位置にある場合を示す断面図である。FIG. 4 is a cross-sectional view showing a case where the plug body is in the first position. 図５は栓体が第２の位置にある場合を示す断面図である。FIG. 5 is a cross-sectional view showing a case where the plug body is in the second position. 図６は第１流路の部分を拡大して示す断面図である。FIG. 6 is an enlarged cross-sectional view showing a portion of the first flow path. 図７は栓体の変形例を示す断面図である。FIG. 7 is a cross-sectional view showing a modified example of the plug body. 図８は医療用活栓の変形例を示す断面図である。FIG. 8 is a cross-sectional view showing a modified example of the medical stopcock.

図１〜３に示すように、本実施形態の医療用活栓は三方活栓であり、円筒状の本体１０１と、本体１０１の側面に周方向に互いに間隔をおいて接続された第１管路１１１、第２管路１１２及び第３管路１１３と、本体１０１の内周面により外周面が支持され、本体１０１に対して相対的に回転可能な円柱状の栓体１０２とを有している。 As shown in FIGS. 1 to 3, the medical stopcock of the present embodiment is a three-way stopcock, and is connected to the cylindrical main body 101 and the side surface of the main body 101 at intervals in the circumferential direction. , The second pipeline 112 and the third pipeline 113, and a columnar stopcock 102 whose outer peripheral surface is supported by the inner peripheral surface of the main body 101 and is rotatable relative to the main body 101. ..

本実施形態の三方活栓は、第１管路１１１と第２管路１１２とが、本体１０１を挟んで直線的に設けられており、第３管路１１３は、第１管路１１１及び第２管路１１２と直交する方向に設けられている。図１においては、第１管路１１１がメスルアコネクタであり、第２管路１１２がカプラ付オスルアコネクタであり、第３管路１１３が弁体１３４を有するニードルレスコネクタである例を示している。本実施形態の三方活栓は任意の方向に配置して使用することができるが、以下においては、第３管路１１３を上側に向けて配置されているとして説明を行う。また、各管路について、本体１０１と接続されている側を基端、反対側を末端として説明する。 In the three-way stopcock of the present embodiment, the first pipe line 111 and the second pipe line 112 are provided linearly with the main body 101 interposed therebetween, and the third pipe line 113 is the first pipe line 111 and the second line. It is provided in a direction orthogonal to the pipeline 112. FIG. 1 shows an example in which the first pipeline 111 is a female connector, the second pipeline 112 is an male lure connector with a coupler, and the third pipeline 113 is a needleless connector having a valve body 134. ing. The three-way stopcock of the present embodiment can be arranged and used in any direction, but in the following, it will be described assuming that the third pipeline 113 is arranged facing upward. Further, each pipeline will be described with the side connected to the main body 101 as the base end and the opposite side as the end.

第３管路１１３の基端部には、筒状の本体１０１の軸方向に沿って第３管路１１３を２つの部分に区画する隔壁１３３が設けられている。栓体１０２は、外周面に設けられた溝部１２１を有している。栓体１０２はハンドル１０５と一体となっており、ハンドル１０５と共に回転させることができる。 At the base end of the third pipeline 113, a partition wall 133 for partitioning the third pipeline 113 into two portions is provided along the axial direction of the tubular main body 101. The plug body 102 has a groove portion 121 provided on the outer peripheral surface. The plug body 102 is integrated with the handle 105 and can be rotated together with the handle 105.

図４に示すように、栓体１０２を本体１０１に対して相対回転させて第１の位置とした際に、溝部１２１と本体１０１の内壁とにより第１管路１１１と第３管路１１３とを接続する第１の通路１２３と、第２管路１１２と第３管路１１３とを接続する第２流路１２４とが形成される。また、隔壁１３３の外周面と第３管路１１３の内壁面とにより第１流路１２３と第２流路１２４とを接続する第３流路１２７が形成され、溝部１２１と隔壁１３３の本体１０１側の端部とにより第１流路１２３と第２流路１２４とを接続する第４流路１２８が形成される。 As shown in FIG. 4, when the plug body 102 is rotated relative to the main body 101 to be in the first position, the groove portion 121 and the inner wall of the main body 101 cause the first pipe line 111 and the third pipe line 113. A first passage 123 connecting the two passages 123 and a second passage 124 connecting the second pipeline 112 and the third pipeline 113 are formed. Further, a third flow path 127 connecting the first flow path 123 and the second flow path 124 is formed by the outer peripheral surface of the partition wall 133 and the inner wall surface of the third pipeline 113, and the groove portion 121 and the main body 101 of the partition wall 133 are formed. A fourth flow path 128 connecting the first flow path 123 and the second flow path 124 is formed by the side end portion.

このため、第１流路１２３と第２流路１２４とは、第３管路１１３内を通過する第３流路１２７により接続されると共に、本体１０１内を通過する第４流路１２７によっても接続される。さらに、第３流路１２７は、隔壁１３３により第１管路１１１側の第１部分１３１と第２管路１１２側の第２部分１３２とに区切られている。第３流路１２７を流れる薬液等は、第１部分１３１と第２部分１３２とを通過する。 Therefore, the first flow path 123 and the second flow path 124 are connected by the third flow path 127 passing through the third pipeline 113, and also by the fourth flow path 127 passing through the main body 101. Be connected. Further, the third flow path 127 is divided into a first portion 131 on the first pipeline 111 side and a second portion 132 on the second pipeline 112 side by the partition wall 133. The chemical solution or the like flowing through the third flow path 127 passes through the first portion 131 and the second portion 132.

図５に示すように、栓体１０２を第１の位置から１８０度程度回転させた第２の位置とすることにより、第１管路１１１と第２管路１１２とは、溝部１２１と本体１０１の内壁面とにより形成される第５流路１２９により接続されるが、第３管路１１３とは接続されず第３流路１２７は閉鎖される。なお、栓体１０２を第１の位置から時計回りに９０度程度回転させた第３の位置とすることにより、第１管路１１１と第３管路１１３とを接続することができ、反時計回りに９０度程度回転させた第４の位置とすることにより第２管路１１２と第３管路１１３とを接続することができる。 As shown in FIG. 5, by setting the plug body 102 to the second position rotated by about 180 degrees from the first position, the first pipe line 111 and the second pipe line 112 are separated from each other by the groove portion 121 and the main body 101. Although it is connected by the fifth flow path 129 formed by the inner wall surface of the pipe, it is not connected to the third pipeline 113 and the third flow path 127 is closed. By setting the plug body 102 to the third position, which is rotated clockwise by about 90 degrees from the first position, the first pipe line 111 and the third pipe line 113 can be connected, and counterclockwise. The second line 112 and the third line 113 can be connected by setting the fourth position rotated by about 90 degrees.

栓体１０２を第１の位置として、第１管路１１１から第２管路１１２側へ薬液等を流す場合に、第４流路１２８が塞がれ、第３管路１１３に設けられた第３流路１２７だけが開通していると、流路の抵抗が大きくなり、第２管路１１２への流量が減少してしまう。しかし、本実施形態の三方活栓は、第３流路１２７だけでなく第４の流路１２８によっても第１管路１１１と第２管路１１２とが接続されているため、第１管路１１１から第２管路１１２への流量を確保し、流量減少を発生しにくくできる。第１流路１２３から第３流路１２７に流れ込んだ薬液は、第１部分１３１側を末端側に流れ、第３管路１１３の末端側において隔壁１３３を乗り越え第２部分１３２を通って第２流路１２４へ流れる。このため、隔壁１３３が無い場合と比べて、第３管路１１３の全体をフラッシングすることができる。従って、第３管路１１３から別の薬液を注入した場合に、第３管路１１３から注入した薬液が第３管路１１３内にほとんど滞留しないようにできる。 When the chemical solution or the like is flowed from the first pipe line 111 to the second pipe line 112 side with the plug body 102 as the first position, the fourth flow path 128 is blocked and the third pipe line 113 is provided. If only the three flow paths 127 are open, the resistance of the flow paths will increase and the flow rate to the second pipeline 112 will decrease. However, in the three-way stopcock of the present embodiment, since the first pipe line 111 and the second pipe line 112 are connected not only by the third flow path 127 but also by the fourth flow path 128, the first pipe line 111 It is possible to secure the flow rate from the pipe to the second pipeline 112 and make it difficult for the flow rate to decrease. The chemical solution that has flowed from the first flow path 123 to the third flow path 127 flows to the terminal side on the first portion 131 side, gets over the partition wall 133 on the terminal side of the third conduit 113, passes through the second portion 132, and passes through the second portion 132. It flows into the flow path 124. Therefore, the entire third pipeline 113 can be flushed as compared with the case where the partition wall 133 is not provided. Therefore, when another chemical solution is injected from the third conduit 113, the chemical solution injected from the third conduit 113 can be prevented from staying in the third conduit 113.

図３に示すように、第３管路１１３の基端部における軸方向に沿った幅は、第１流路１２３及び第２流路１２４である溝部１２１の幅と一致している。このため、第１管路１１１側から第１流路１２３を流れてきた第１の薬液は、第４流路１２８側だけでなく、第３流路１２７の第１部分１３１内へもスムーズに導かれる。また、第２部分１３２内から第２流路１２４へ流れる。このため、第３管路１１３内における薬液の滞留をより生じにくくすることができる。なお、三方活栓は輸液、麻酔及び経腸栄養等に使用され、それぞれの用途で適切な流量を確保するために溝部１２１の幅は１．５ｍｍ〜４．０ｍｍであることが好ましく、本体側の端部の幅は１．５ｍｍ〜４．０ｍｍであることが好ましい。 As shown in FIG. 3, the width along the axial direction at the base end portion of the third pipeline 113 coincides with the width of the groove portion 121 which is the first flow path 123 and the second flow path 124. Therefore, the first chemical solution flowing from the first conduit 111 side to the first flow path 123 smoothly flows not only into the fourth flow path 128 side but also into the first portion 131 of the third flow path 127. Be guided. Further, it flows from the inside of the second portion 132 to the second flow path 124. Therefore, it is possible to make it more difficult for the chemical solution to stay in the third conduit 113. The three-way stopcock is used for infusion, anesthesia, enteral nutrition, etc., and the width of the groove 121 is preferably 1.5 mm to 4.0 mm in order to secure an appropriate flow rate for each application, and the width of the groove 121 is preferably 1.5 mm to 4.0 mm. The width of the end is preferably 1.5 mm to 4.0 mm.

なお、上記のような寸法は特に限定されるものでなく、用途によって適宜変更することができる。 The dimensions as described above are not particularly limited, and can be appropriately changed depending on the intended use.

第３管路１１３には、末端側から基端側に向かって次第に内径が小さくなる縮径部１３５を設けることができる。縮径部１３５を設けることにより、第１流路１２３及び第２流路１２４である溝部１２１の幅に合わせて狭くなった基端側と、注射筒等が挿入できる内径を有する末端側とを段差無く接続することができ、第３流路１２７を流れる液量を十分に確保でき、薬液の滞留をより生じにくくすることができる。 The third pipeline 113 may be provided with a reduced diameter portion 135 whose inner diameter gradually decreases from the terminal side to the proximal end side. By providing the reduced diameter portion 135, the base end side narrowed according to the width of the groove portion 121 which is the first flow path 123 and the second flow path 124 and the terminal side having an inner diameter into which an injection tube or the like can be inserted are provided. It is possible to connect without a step, a sufficient amount of liquid flowing through the third flow path 127 can be secured, and the retention of the chemical liquid can be made less likely to occur.

第３管路１１３にオスルアコネクタを挿入する場合、隔壁１３３は、オスルアコネクタの挿入深さを制限するストッパとすることができる。この場合、オスルアコネクタを適切な位置まで挿入した際に、オスルアコネクタの先端が、隔壁１３３の末端側の端面と当接するように設計すればよい。例えば、標準的なカプラ付オスルアコネクタの場合、４．０ｍｍ〜８．０ｍｍ程度挿入できるようにすることが好ましい。 When the male lure connector is inserted into the third pipeline 113, the partition wall 133 can be a stopper that limits the insertion depth of the male lure connector. In this case, when the male lure connector is inserted to an appropriate position, the tip of the male lure connector may be designed to come into contact with the end face on the terminal side of the partition wall 133. For example, in the case of a standard male lure connector with a coupler, it is preferable to be able to insert about 4.0 mm to 8.0 mm.

また、隔壁１３３の末端側は半球状等の曲面形状を有することが好ましい。このように構成することで、末端側が角形状である場合に比べて第３管路１１３内での滞留を防止しやすくなる。 Further, it is preferable that the terminal side of the partition wall 133 has a curved surface shape such as a hemisphere. With such a configuration, it becomes easier to prevent retention in the third pipeline 113 as compared with the case where the terminal side has a square shape.

本実施形態において、栓体１０２を第１の位置とした状態において、図４に示すように、溝部１２１の第４流路１２８を構成する頂上部は平坦となっていることが好ましい。このような構成とすることにより、図５に示すように栓体１０２を第１の位置から１８０度回転させた第２の位置とした場合に、第５流路１２９の中間部に大きく盛り上がった凸部が生じている場合と比べて、第５流路１２９にボトルネックが生じにくく、第１管路１１１から第２管路１１２への十分な流量を確保できる。なお、頂上部は、完全に平らではなく若干の膨らみが設けられていてもよい。例えば、本体１０１の内周とほぼ平行な曲面等とすることができる。少なくとも、第１流路１２３である斜面と頂上部との接続部分及び第２流路１２４である斜面と頂上部との接続部分は、第３流路１２７方向へ伸びる曲面となっていた方が好ましい。このように構成することで、第３流路への流れが促され、第１管路１１１から第２管路１１２への十分な流量を確保できる。 In the present embodiment, it is preferable that the top portion of the groove 121 forming the fourth flow path 128 is flat as shown in FIG. 4 in the state where the plug 102 is in the first position. With such a configuration, when the plug body 102 is set to the second position rotated by 180 degrees from the first position as shown in FIG. 5, the plug body 102 is greatly raised in the middle portion of the fifth flow path 129. Compared with the case where the convex portion is generated, a bottleneck is less likely to occur in the fifth flow path 129, and a sufficient flow rate from the first line line 111 to the second line line 112 can be secured. It should be noted that the top portion may not be completely flat and may be provided with a slight bulge. For example, it can be a curved surface or the like substantially parallel to the inner circumference of the main body 101. At least, the connecting portion between the slope and the top of the first flow path 123 and the connecting portion between the slope and the top of the second flow path 124 should be curved surfaces extending in the direction of the third flow path 127. preferable. With such a configuration, the flow to the third flow path is promoted, and a sufficient flow rate from the first line 111 to the second line 112 can be secured.

また、図４に示すように、第１の位置において、第１流路１２３の上端部は、第１管路１１１の基端における上側の端部よりも上側に設けられることが好ましい。このように構成することで、第１部分１３１への流れが促され、その結果滞留を生じにくくすることができる。 Further, as shown in FIG. 4, it is preferable that the upper end portion of the first flow path 123 is provided above the upper end portion at the base end of the first pipeline 111 at the first position. With such a configuration, the flow to the first portion 131 is promoted, and as a result, retention can be less likely to occur.

なお、三方活栓は輸液、麻酔及び経腸栄養等に使用され、それぞれの用途で適切な流量を確保するために本体１０１の内径Φは４．５ｍｍ〜１０．５ｍｍとすることができる。栓体１０２を第１の位置とした際に、第３管路１１３を通る薬液の量を十分に確保するために、第４流路１２８における溝部１２１の底面と隔壁１３３の本体１０１側の端面との最小間隔ｄ１は、０．８ｍｍ〜２．８ｍｍ程度とすることが好ましい。ｄ１をこのような値とすることにより、栓体１０２を第２の位置とした際に、第１管路１１１と第２管路１１２との間の流量も十分に確保できる。また、溝部１２１の最大高低差ｈを２．０ｍｍ〜５．０ｍｍ程度とすることもできる。 The three-way stopcock is used for infusion, anesthesia, enteral nutrition, etc., and the inner diameter Φ of the main body 101 can be 4.5 mm to 10.5 mm in order to secure an appropriate flow rate for each application. When the plug body 102 is set to the first position, the bottom surface of the groove 121 in the fourth flow path 128 and the end surface of the partition wall 133 on the main body 101 side in order to secure a sufficient amount of the chemical solution passing through the third conduit 113. The minimum distance d1 from and is preferably about 0.8 mm to 2.8 mm. By setting d1 to such a value, a sufficient flow rate between the first pipe line 111 and the second pipe line 112 can be secured when the plug body 102 is set to the second position. Further, the maximum height difference h of the groove portion 121 can be set to about 2.0 mm to 5.0 mm.

栓体１０２を第１の位置とした際に、第１流路１２３及び第２流路１２４の流量を確保するために、第１流路１２３及び第２流路１２４における溝部１２１の底面と本体１０１の内壁面との最小間隔ｄ２及びｄ３は、１．０ｍｍ〜２．５ｍｍ程度とすることが好ましい。ｄ２及びｄ３をこのような値とすることにより、栓体１２０を第２の位置とした際に、第１管路１１１と第２管路１１２との間の流量も十分に確保できる。 When the plug body 102 is set to the first position, the bottom surface and the main body of the groove 121 in the first flow path 123 and the second flow path 124 are used to secure the flow rates of the first flow path 123 and the second flow path 124. The minimum distances d2 and d3 from the inner wall surface of 101 are preferably about 1.0 mm to 2.5 mm. By setting d2 and d3 to such values, a sufficient flow rate between the first pipe line 111 and the second pipe line 112 can be secured when the plug body 120 is set to the second position.

図４に示すように、栓体１０２を第１の位置とした状態において、溝部１２１における第１流路１２３を構成する部分の延長線が、隔壁１３３の第１管路１１１側の側面の最下端に達し、第２流路１２４を構成する部分の延長線が、隔壁１３３の第２管路１１２側の側面の最下端に達するようにできる。栓体１０２を第２の位置とした際に十分な流量を確保できるように第４流路１２８を大きくすると、栓体１０２を第１の位置とした場合に、第１管路１１１から第２管路１１２へ流れる薬液の大部分が隔壁１３３の下側の第４流路１２８を通過してしまい、第３管路１１３をフラッシングできないおそれがある。しかし、本実施形態の三方活栓は、溝部１２１における第１流路１２３である斜面の延長線及び第２流路１２４である斜面の延長線が、隔壁１３３の側面の最下端に達するように設計されている。このため、第１管路１１１から第１流路１２３により第３管路１１３に向かう薬液の流れは、隔壁１３３の側面に当たり、隔壁１３３に沿って第３流路１２７の第１部分１３１内に侵入しやすくなる。また、第２部分１３２からの薬液の流れは、第２流路１２４に当たり、第２管路１１２側へ流れやすくなる。このため、第３管路１１３を通る薬液の量を十分に確保することができる。 As shown in FIG. 4, when the plug 102 is in the first position, the extension line of the portion of the groove 121 that constitutes the first flow path 123 is the outermost side surface of the partition wall 133 on the first conduit 111 side. The extension line of the portion that reaches the lower end and constitutes the second flow path 124 can reach the lowermost end of the side surface of the partition wall 133 on the second pipeline 112 side. If the fourth flow path 128 is increased so that a sufficient flow rate can be secured when the plug body 102 is set to the second position, the first conduit 111 to the second line 111 to the second when the plug body 102 is set to the first position. Most of the chemical solution flowing into the pipeline 112 may pass through the fourth flow path 128 below the partition wall 133, and the third pipeline 113 may not be flushed. However, the three-way stopcock of the present embodiment is designed so that the extension line of the slope which is the first flow path 123 and the extension line of the slope which is the second flow path 124 in the groove portion 121 reach the lowermost end of the side surface of the partition wall 133. Has been done. Therefore, the flow of the chemical liquid from the first conduit 111 to the third conduit 113 by the first conduit 123 hits the side surface of the partition wall 133 and enters the first portion 131 of the third channel 127 along the partition wall 133. It becomes easy to invade. Further, the flow of the chemical solution from the second portion 132 hits the second flow path 124 and tends to flow toward the second pipeline 112 side. Therefore, a sufficient amount of the chemical solution passing through the third conduit 113 can be secured.

なお、図６に示すように、栓体１０２を第１の位置とした状態において、溝部１２１における第１流路１２３を構成する部分の第３管路側１１３側の端部（上端部）１２３ａは、第３流路１２７の第１の部分１３１を本体１０１内に延長した範囲に位置するようにすることができる。第１流路１２３の上端部１２３ａが、第１の部分１３１を延長した範囲内に位置することにより、第１流路１２３から第３流路１２７へ流れる流量を十分に確保することができる。同様に、栓体１０２を第１の位置とした状態において、溝部１２１における第２流路１２４を構成する部分の第３管路側１１３側の端部（上端部）１２４ａは、第３流路１２７の第２の部分１３２を本体１０１内に延長した範囲に位置するようにすることができる。 As shown in FIG. 6, in the state where the plug body 102 is in the first position, the end portion (upper end portion) 123a on the third pipeline side 113 side of the portion constituting the first flow path 123 in the groove portion 121 is , The first portion 131 of the third flow path 127 can be located in the extended range in the main body 101. By locating the upper end portion 123a of the first flow path 123 within the range extending the first portion 131, it is possible to sufficiently secure the flow rate flowing from the first flow path 123 to the third flow path 127. Similarly, in the state where the plug body 102 is in the first position, the end portion (upper end portion) 124a on the third conduit side 113 side of the portion constituting the second flow path 124 in the groove portion 121 is the third flow path 127. The second portion 132 of the above can be located in an extended range within the main body 101.

また、図７に示すように、栓体１０２を第１の位置とした場合に、溝部１２１における第１流路１２３及び第２流路１２４となる部分は、隔壁１３３がある方向へ湾曲していてもよい。この場合にも、栓体１０２を第１の位置とした状態において、溝部１２１における第１流路１２３を構成する部分の上端部１２３ａは、第３流路１２７の第１の部分１３１を本体１０１内に延長した範囲に位置するようにすることができる。このような構成とすることで、栓体１０２を第１の位置とした場合に、第１流路１２３の流量を十分に確保しやすくなり、第１流路１２３から第３流路１２７へ流れ込む流量及び第１流路１２３から第４流路１２８へ流れ込む流量を確保しやすくなる。また、栓体１０２を第２の位置とした場合に、第１管路１１１から第２管路１１２への流量も確保しやすくなる。 Further, as shown in FIG. 7, when the plug body 102 is set to the first position, the portions of the groove portion 121 that become the first flow path 123 and the second flow path 124 are curved in the direction in which the partition wall 133 is located. You may. Also in this case, in the state where the plug body 102 is in the first position, the upper end portion 123a of the portion forming the first flow path 123 in the groove portion 121 has the first portion 131 of the third flow path 127 as the main body 101. It can be located in an extended range within. With such a configuration, when the plug body 102 is set to the first position, it becomes easy to secure a sufficient flow rate of the first flow path 123, and the flow flows from the first flow path 123 to the third flow path 127. It becomes easy to secure the flow rate and the flow rate flowing from the first flow path 123 to the fourth flow path 128. Further, when the plug body 102 is set to the second position, it becomes easy to secure the flow rate from the first pipe line 111 to the second pipe line 112.

また、図６、図７に示すように、第１流路１２１の斜面の頂部付近における曲率の符号が正から負、又は負から正に変化する部分は１カ所であることが好ましい。曲率が変化する部分を１ヶ所とすることにより、第１流路１２１において段差を生じさせず、段差による滞留を生じにくくできる。 Further, as shown in FIGS. 6 and 7, it is preferable that the sign of the curvature in the vicinity of the top of the slope of the first flow path 121 changes from positive to negative or from negative to positive at one place. By setting the portion where the curvature changes to one place, it is possible to prevent a step from being generated in the first flow path 121 and to prevent retention due to the step.

本実施形態の三方活栓は、第１流路１２３の延長線及び第２流路１２４の延長線が、隔壁１３３の側面の最下端に達するようにしたが、溝部１２１における第１流路１２３である部分の延長線及び第２流路１２４である部分の延長線が、隔壁１３３と交差するようにできればよく、隔壁１３３の側面の最下端よりも上側に達するようにすることともできる。この場合においても、第１流路１２３の延長線及び第２流路１２４の延長線が隔壁１３３の基端面に達している場合と比べて、第３管路１１３へ薬液を導くことができる。但し、第１流路１２３の延長線及び第２流路１２４の延長線が、隔壁１３３の側面の最下端に達している場合の方が、流路となる溝部１２１の深さを確保しやすく、流量の確保が容易となる。 In the three-way stopcock of the present embodiment, the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the lowermost end of the side surface of the partition wall 133, but the first flow path 123 in the groove portion 121 It suffices if the extension line of a certain portion and the extension line of the portion that is the second flow path 124 intersect with the partition wall 133, and may reach above the lowermost end of the side surface of the partition wall 133. Also in this case, the chemical solution can be guided to the third conduit 113 as compared with the case where the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the base end surface of the partition wall 133. However, when the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the lowermost end of the side surface of the partition wall 133, it is easier to secure the depth of the groove portion 121 which is the flow path. , It becomes easy to secure the flow rate.

図４に示すように、栓体１０２を第１の位置とした場合に、第１流路１２３の外側端部が、第１管路１１１の基端における下側の端部（端部下面）よりも若干下側に位置し、第２流路１２４の外側端部が、第２管路１１２の端部下面よりも若干下側に位置することが好ましい。術者が栓体１０２を操作する際に、完全にずれが生じないように位置を合わせることは困難であり、通常は０°より大きく±６°より小さい程度のずれが生じる。栓体１０２を完全に第１の位置に合わせた場合に、第１流路１２３と第１管路１１１との端部同士及び第２流路１２４と第２管路１１２との端部同士が完全に一致するようにすると、位置合わせの僅かなずれによっても、第１管路１１１の基端を塞ぐような段差が生じるおそれがある。第１管路１１１の基端を塞ぐような段差が生じると、流量が制限され、滞留の原因となる。一方、栓体１０２を完全に第１の位置に合わせた場合に、第１流路１２３の外側端部が第１管路１１１の端部下面よりも若干下側に位置するようにすれば、位置合わせがずれた場合においても第１管路１１１の端部を塞ぐような段差を生じにくくすることができる。第２流路１２４と第２管路１１２との関係においても同様である。 As shown in FIG. 4, when the plug body 102 is set to the first position, the outer end portion of the first flow path 123 is the lower end portion (lower end portion) at the base end of the first pipeline 111. It is preferable that the outer end portion of the second flow path 124 is located slightly below the lower surface of the end portion of the second pipeline 112. When the operator operates the plug body 102, it is difficult to align the plug body 102 so as not to cause a complete deviation, and usually a deviation of more than 0 ° and less than ± 6 ° occurs. When the plug body 102 is completely aligned with the first position, the ends of the first flow path 123 and the first pipe line 111 and the ends of the second flow path 124 and the second pipe line 112 are aligned with each other. If they are made to match perfectly, even a slight misalignment may cause a step that closes the base end of the first pipeline 111. If a step that closes the base end of the first pipeline 111 occurs, the flow rate is limited, which causes retention. On the other hand, when the plug body 102 is completely aligned with the first position, if the outer end portion of the first flow path 123 is located slightly below the lower surface of the end portion of the first pipeline 111, Even if the alignment is misaligned, it is possible to prevent a step that closes the end of the first pipeline 111 from occurring. The same applies to the relationship between the second flow path 124 and the second pipeline 112.

また、図５に示すように、栓体１０２を第２の位置とした場合に、第５流路１２９の第２管路１１２側の外側端部が、第２管路１１２の基端における上側の端部（端部上面）よりも若干上側に位置し、第５流路１２９の第１管路１１１側の外側端部が、第１管路１１１の基端における端部正面よりも若干上側に位置することが好ましい。このような配置とすることにより、栓体１０２が第２の位置から若干ずれた場合においても、第１管路１１１の端部を塞ぐような段差が生じにくく、第１管路１１１と第２管路１１２との間を第５流路１２９を介してスムーズに薬液が流れるようにできる。 Further, as shown in FIG. 5, when the plug body 102 is set to the second position, the outer end portion of the fifth flow path 129 on the second pipeline 112 side is the upper side at the base end of the second pipeline 112. The outer end of the fifth flow path 129 on the first pipeline 111 side is located slightly above the end (upper surface of the end) of the first pipeline 111, and slightly above the front end of the first conduit 111. It is preferably located at. With such an arrangement, even if the plug 102 is slightly displaced from the second position, a step that closes the end of the first pipeline 111 is unlikely to occur, and the first pipeline 111 and the second pipeline 111 and the second pipeline 111 are less likely to be stepped. The chemical solution can flow smoothly between the pipe line 112 and the pipe line 112 via the fifth flow path 129.

本実施形態において、第３管路１１３に設ける弁体１３４は、スリットを有するスリット弁とすることができる。スリット弁とすることにより、第３管路１１３にルアシリンジ等のオスルアコネクタを挿入し、薬液を容易に注入することができる。また、オスルアコネクタを抜き取ることにより再び第３管路１１３の末端を閉止できる。 In the present embodiment, the valve body 134 provided in the third conduit 113 can be a slit valve having a slit. By using the slit valve, a male lure connector such as a lure syringe can be inserted into the third pipe line 113, and the chemical solution can be easily injected. Further, the end of the third pipeline 113 can be closed again by pulling out the male lure connector.

本実施形態において、第３管路１１３の末端を閉止する弁体１３４が外部ハウジング１３７と内部ハウジング１３６との間に挟み込まれている例を示したが、弁体１３４の固定方法はこれに限らずどのようにしてもよい。また、外部ハウジング１３７にカプラを係合するためのねじ山１３８が設けられている構成としたが、ねじ山１３８が無い構成としてもよい。第３管路１１３は、薬液等の注入及び末端の閉止ができれば、ニードルレスコネクタ以外のコネクタとすることもできる。例えば、スリットの無い弁体を設け、注射針を用いて薬液を注入する構成とすることができる。また、図８に示すように、ルアシリンジ等が接続できる単純なメスコネクタとすることも可能である。 In the present embodiment, an example is shown in which the valve body 134 that closes the end of the third pipeline 113 is sandwiched between the outer housing 137 and the inner housing 136, but the method of fixing the valve body 134 is limited to this. It doesn't matter what you do. Further, although the external housing 137 is provided with the screw thread 138 for engaging the coupler, the external housing 137 may be configured without the screw thread 138. The third conduit 113 can be a connector other than the needleless connector as long as it can inject a chemical solution or the like and close the end. For example, a valve body without a slit may be provided, and a drug solution may be injected using an injection needle. Further, as shown in FIG. 8, it is also possible to use a simple female connector to which a lure syringe or the like can be connected.

本実施形態において、第１管路１１１がメスルアコネクタであり、第２管路１１２がオスルアコネクタである例を示したが、第１管路１１１及び第２管路１１２はどのようなコネクタとしてもよい。例えば、メスルアコネクタとオスルアコネクタを入れ替えても、両方をオスルアコネクタ又はメスルアコネクタとしてもよい。また、コネクタではなく、パイプ等と直結されていてもよい。本実施形態において、上流側の管路は、本体部に向かって次第に縮径しているようにすることができる。このような構成とすることにより、上流側の管路内における液の滞留を生じにくくすることができる。 In the present embodiment, an example is shown in which the first pipeline 111 is a female connector and the second pipeline 112 is an male lure connector, but what kind of connector is the first pipeline 111 and the second pipeline 112? May be. For example, the female connector and the male lure connector may be exchanged, or both may be the male lure connector or the female lure connector. Further, it may be directly connected to a pipe or the like instead of a connector. In the present embodiment, the upstream pipeline can be gradually reduced in diameter toward the main body. With such a configuration, it is possible to prevent the liquid from staying in the pipeline on the upstream side.

本実施形態において、医療用活栓が三方活栓である例を示したが、三方活栓に限らず、薬液の注入を行う分岐を有している医療用活栓を同様の構成とすることができる。例えば、第３管路と反対側に第４管路が設けられた構成とすることもできる。 In the present embodiment, an example in which the medical stopcock is a three-way stopcock has been shown, but the same configuration can be applied not only to the three-way stopcock but also to a medical stopcock having a branch for injecting a chemical solution. For example, the configuration may be such that the fourth pipeline is provided on the opposite side of the third pipeline.

本実施形態の医療用活栓は、管路内における薬液の滞留が生じにくく、輸液回路等の医療用回路に接続する医療用活栓として有用である。 The medical stopcock of the present embodiment is useful as a medical stopcock connected to a medical circuit such as an infusion circuit because the drug solution does not easily stay in the pipeline.

１０１本体
１０２栓体
１０５ハンドル
１１１第１管路
１１２第２管路
１１３第３管路
１２１溝部
１２３第１流路
１２４第２流路
１２７第３流路
１２８第４流路
１２９第５流路
１３１第１部分
１３２第２部分
１３３隔壁
１３４弁体
１３５縮径部
１３６内部ハウジング
１３７外部ハウジング
１３８ねじ山101 Main body 102 Plug 105 Handle 111 1st pipeline 112 2nd pipeline 113 3rd pipeline 121 Groove 123 1st flow path 124 2nd flow path 127 3rd flow path 128 4th flow path 129 5th flow path 131 1st part 132 2nd part 133 Partition wall 134 Valve body 135 Reduced diameter part 136 Inner housing 137 External housing 138 Thread

Claims

Cylindrical body and
The first pipe, the second pipe, and the third pipe, which are connected to the side surface of the main body at intervals in the circumferential direction, respectively.
An outer peripheral surface is supported by the inner peripheral surface of the main body, and a columnar plug body that is rotatable relative to the main body is provided.
The third pipeline has a partition wall for partitioning the inside of the third pipeline.
The plug body has a groove portion provided on the outer peripheral surface thereof, and has a groove portion.
The first pipe line and the second pipe line are composed of the groove portion and the inner wall surface of the main body when the plug body is set to the first position, and the first pipe line and the third pipe line are formed. A first flow path connecting the road, a second flow path formed by the groove portion and the inner wall surface of the main body, and connecting the second pipe line and the third pipe line, and an outer peripheral surface of the partition wall. And the inner wall surface of the third pipeline, the third flow path connecting the first flow path and the second flow path, and the groove portion and the end surface of the partition wall on the main body side. , Connected by a fourth flow path connecting the first flow path and the second flow path .
The groove has a top portion that constitutes the fourth flow path, and has a top portion.
The top is a medical stopcock whose length in the direction connecting the first flow path and the second flow path is longer than that of the partition wall when the plug body is in the first position.

When the stopcock is set to the first position, the extension line of the portion of the groove portion that becomes the first flow path reaches the side surface of the partition wall on the first conduit side, and the second flow in the groove portion. The medical stopcock according to claim 1, wherein the extension line of the portion to be a road reaches the side surface of the partition wall on the second conduit side.

According to claim 1, when the stopcock is set to the first position, the portion of the groove that serves as the first flow path intersects the partition wall and extends in the direction toward the third conduit. The medical stopcock described.

The third flow path has a first portion on the first pipeline side and a second portion on the second pipeline side.
When the stopcock is set to the first position, the end portion of the groove portion that becomes the first flow path on the third pipeline side has the first portion of the third flow path in the main body. The medical stopcock according to claim 1, which is located within the range extended to.

The medical stopcock according to any one of claims 1 to 4, wherein the third conduit has a reduced diameter portion whose inner diameter gradually decreases toward the main body side.

The medical stopcock according to any one of claims 1 to 5, wherein the width of the end portion on the main body side in the third pipeline is equal to or larger than the width of the groove portion.

The medical stopcock according to claim 6, wherein the width of the groove is 1.5 mm or more and 4.0 mm or less.

A male connector can be inserted into the third pipeline from the end opposite to the main body.
The medical stopcock according to any one of claims 1 to 7, wherein the tip of the inserted male connector comes into contact with the end surface of the partition wall.

The medical stopcock according to any one of claims 1 to 8, wherein the first pipeline has a diameter reduced toward the main body side.

Any one of claims 1 to 9, wherein the outer end of the first flow path is provided at a position lower than the lower surface of the end of the first pipeline at the first position. The medical stopcock described in.