JP2006068509A - Pre-fillable syringe - Google Patents

Pre-fillable syringe Download PDF

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JP2006068509A
JP2006068509A JP2005225014A JP2005225014A JP2006068509A JP 2006068509 A JP2006068509 A JP 2006068509A JP 2005225014 A JP2005225014 A JP 2005225014A JP 2005225014 A JP2005225014 A JP 2005225014A JP 2006068509 A JP2006068509 A JP 2006068509A
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front stopper
stopper
cylindrical container
syringe
lock hub
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JP4589193B2 (en
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Yusuke Sakurai
裕介 櫻井
Jotaro Kishimoto
丈太郎 岸本
Shinichiro Nakai
慎一郎 中井
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Takeda Pharmaceutical Co Ltd
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Takeda Chemical Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pre-fillable syringe which can prevent any air bubbles that have been enclosed in a liquid medicine filling chamber in order to mix a liquid medicine in the syringe just before the use from remaining near the bottom of a front stopper at the time of deaeration. <P>SOLUTION: This pre-fillable syringe is provided with a plurality of projections (24) on annular recessed parts (19) between a plurality of annular ribs of a front stopper (3) in order to delay the inflow of the liquid medicine, and a plurality of grooves (23) along the axis on the inner wall of a locking hub (5) in order to help the smooth movement of a gas and the liquid medicine enclosed therein, and a plurality of projections (18) which nip the front stopper (3) housed by the syringe from leaning even when it is pulled back and stop the lower end of the front stopper (3) from reaching the bottom so as to leave a clearance in a cylindrical container (1). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、使用直前に予め薬液中に意図的に充填された気体(11)を、針先を上方に向けながら、プランジャーロッド(6)を押して注射針(7)の先端から脱気するよう設計されたプレフィラブルシリンジにおいて、脱気時、気泡の一部がフロントストッパー(3)下辺部に残留したまま薬液が針先端から流出し、注射の途中にその気泡が抜けて針先の方に移動し、体内に投与されるという現象を防止するために、ロックハブ(5)の内壁に、軸に沿って複数条の溝(23)と、収容したフロントストッパー(3)が自重で後退したときフロントストッパー(3)をロックハブ(5)の底部より少し浮いた状態で挟持するよう複数の突起(18)を設け、且つフロントストッパー(3)の複数の環状リブにはさまれた環状谷間(19)に、フロントストッパー(3)の下方の気泡が抜けきらない間に薬液の流入するのを阻止する複数の突起(24)を設けてなるプレフィラブルシリンジに関する。   In the present invention, the gas (11) that is intentionally filled in the drug solution immediately before use is deaerated from the tip of the injection needle (7) by pushing the plunger rod (6) while the needle tip is directed upward. In the prefillable syringe designed in such a way, during degassing, the chemical solution flows out from the tip of the needle while some of the bubbles remain on the lower side of the front stopper (3), and the bubbles come off during the injection and the needle tip In order to prevent the phenomenon of being moved toward the body and being administered into the body, a plurality of grooves (23) along the axis and the accommodated front stopper (3) are retracted by their own weight on the inner wall of the lock hub (5). A plurality of protrusions (18) are provided so that the front stopper (3) is slightly lifted from the bottom of the lock hub (5), and the annular valley is sandwiched between the plurality of annular ribs of the front stopper (3). (19) About pre filler Bull syringe comprising a plurality of protrusions (24) provided for preventing the flowing of the chemical liquid while the bubbles downwardly is not completely pass through the front stopper (3).

プレフィラブルシリンジは、前端及び後端が開口された筒状容器(1)と、この筒状容器(1)内に気密性且つ液密性の薬液充填室(2)を設けるために摺動自在に挿入されたフロントストッパー(3)およびエンドストッパー(4)、エンドストッパー(4)に接続可能なプランジャーロッド(6)、筒状容器(1)先端に嵌着できプランジャーロッド(6)押出時に筒状容器(1)から押し出されたフロントストッパー(3)を収容して、その内壁とフロントストッパー(3)の外面との間隙から薬液を針基(9)に流すことができるロックハブ(5)および針基(9)を介してロックハブ(5)に嵌合することができる注射針(7)等を含んで構成されている。このプレフィラブルシリンジの基本構造については、特許文献1に詳しく記載されている。
特開2000−334043号公報
The prefillable syringe slides in order to provide a cylindrical container (1) whose front end and rear end are opened, and an airtight and liquid-tight drug solution filling chamber (2) in the cylindrical container (1). Freely inserted front stopper (3), end stopper (4), plunger rod (6) connectable to end stopper (4), plunger rod (6) that can be fitted to the tip of cylindrical container (1) A lock hub that accommodates the front stopper (3) pushed out from the cylindrical container (1) during extrusion and allows a chemical to flow from the gap between the inner wall and the outer surface of the front stopper (3) to the needle base (9). 5) and an injection needle (7) that can be fitted to the lock hub (5) via the needle base (9). The basic structure of this prefillable syringe is described in detail in Patent Document 1.
JP 2000-334043 A

しかしこのプレフィラブルシリンジは、たとえば、沈降精製百日せきジフテリア破傷風混合ワクチン、沈降破傷風トキソイド、日本脳炎ワクチンなどワクチン類を収容したキットとして既に医療現場に供給されているが、シリンジに充填する薬液の種類によっては、投与直前に薬液を均一にするためにシリンジを数回反転させてよく混合する必要のあるものがある。たとえば、沈降破傷風トキソイドはアルミニウムゲルが配合されているので一定時間靜置したものは僅かではあるが沈降が認められる。その沈降物を均一に分散させるために使用直前にシリンジを数回反転させるのであるが、薬液充填室(2)に、薬液のみが密封された状態ではシリンジを反転させても薬液はあまり攪拌、混合されない。
そこで薬液収容室(2)に、意図的に少量(0.01〜1.0mL程度)の気体(11)を封入しておき、シリンジの反転時薬液の攪拌、混合が効率よく行われる様に工夫をすると共に、使用時まずシリンジの針先が斜め上を向く方向にしてプランジャーロッド(6)を静かに押し出すと、気体が、続いて薬液がフロントストッパー(3)とロックハブ(5)との間隙を擦り抜けて針先から出ていく様に、フロントストッパーの底面(13)の外縁に2〜数個の切り欠き部を設けたプレフィラブルシリンジの開発が進められた。
However, this prefillable syringe has already been supplied to the medical field as a kit containing vaccines such as precipitated purified pertussis diphtheria tetanus mixed vaccine, precipitated tetanus toxoid, and Japanese encephalitis vaccine. Some types need to be mixed well by inverting the syringe several times in order to make the drug solution uniform immediately before administration. For example, since sedimented tetanus toxoid contains aluminum gel, sedimentation is observed even though it is slightly placed for a certain period of time. In order to disperse the sediment uniformly, the syringe is inverted several times immediately before use, but in the state where only the chemical solution is sealed in the chemical solution filling chamber (2), the chemical solution is stirred too much even if the syringe is inverted, Not mixed.
Therefore, a small amount (about 0.01 to 1.0 mL) of gas (11) is intentionally enclosed in the chemical solution storage chamber (2) so that the chemical solution can be efficiently stirred and mixed when the syringe is inverted. In addition, when in use, when the plunger rod (6) is gently pushed out with the needle tip of the syringe facing diagonally upward first, the gas and then the chemical solution are transferred to the front stopper (3) and the lock hub (5). Development of a prefillable syringe in which two to several notches were provided on the outer edge of the bottom surface (13) of the front stopper so as to pass through the gap and exit from the needle tip was advanced.

ところが薬液充填室(2)に気体(11)を封入しておくと、使用直前にプランジャーロッド(6)を押してフロントストッパー(3)をロックハブ(5)に押しやり、気体を針先から抜かなければならない。この脱気操作の際、気体がまだ完全には放出されていない時にフロントストッパー(3)の複数の環状リブにはさまれた環状谷間(19)に薬液が素早く回ってしまうと、フロントストッパー(3)の底部などに残留している気体の放出を阻止することになり、完全には脱気されないまま薬液が注射針(7)先端から流出し出し、注射の途中にその気泡が抜けて体内に投与されることがある。この傾向は、薬液に界面活性剤が配合されているような場合は一層強くなる。
また、脱気操作時、ロッドの押圧を解いたり緩めたりすると、フロントストッパー(3)は自重でロックハブ(5)の底部、つまり筒状容器(1)の前端(20)方向に後退するが、その時フロントストッパー(3)の底部がロックハブ(5)と円筒容器の先端部(20)との間の連結部を塞ぐ結果、気体の放出を妨げることもある。
However, if the gas (11) is sealed in the chemical solution filling chamber (2), the plunger rod (6) is pushed just before use, the front stopper (3) is pushed to the lock hub (5), and the gas is removed from the needle tip. There must be. During this degassing operation, if the chemical solution quickly turns into the annular valley (19) sandwiched between the plurality of annular ribs of the front stopper (3) when the gas is not completely released, the front stopper ( 3) will prevent the gas remaining at the bottom, etc. from being released, and the drug solution will flow out from the tip of the injection needle (7) without being completely degassed, and the bubbles will escape during the injection. May be administered. This tendency becomes stronger when a surfactant is blended in the chemical solution.
In addition, when the rod is released or loosened during the deaeration operation, the front stopper (3) is retracted by its own weight toward the bottom of the lock hub (5), that is, toward the front end (20) of the cylindrical container (1). At that time, the bottom portion of the front stopper (3) may block the connecting portion between the lock hub (5) and the tip portion (20) of the cylindrical container.

本発明者らは、上記課題を解決するためにプレフィラブルシリンジにおけるロックハブの構造、フロントストッパーの材質や構造などを色々と変えて数多くのサンプルを試作し、それぞれ脱気テストを繰り返した結果、フロントストッパーの底面(13)の外縁に切り欠きがなく、且つ中心軸に対して直交する平面であるか、又はフロントストッパーの底面(13)から外周面(14)への連結部(12)がフロントストッパー(3)の中心軸に対して線対称をなす斜面および/または凸状曲面の面取部を形成させると共に、ロックハブ(5)の内壁に、複数の溝(23)と、収容したフロントストッパー(3)が後退したときフロントストッパー(3)を気体の通路を確保するためロックハブの底部から少し浮いた状態で挟持するよう複数の突起(18)を設け、且つフロントストッパー(3)の複数の環状リブにはさまれた環状谷間(19)に薬液の侵入を遅らせる複数の突起(24)を設けることにより、注射前に完全脱気を可能とすることができることを突き止め、さらに研究を重ねて本発明を完成するに至った。   In order to solve the above-mentioned problems, the inventors made a number of samples by variously changing the structure of the lock hub in the prefillable syringe, the material and structure of the front stopper, and the result of repeating the deaeration test, There is no notch on the outer edge of the bottom surface (13) of the front stopper and the surface is a plane orthogonal to the central axis, or the connecting portion (12) from the bottom surface (13) of the front stopper to the outer peripheral surface (14) A chamfered portion having a slope and / or a convex curved surface that is symmetric with respect to the central axis of the front stopper (3) is formed, and a plurality of grooves (23) are formed on the inner wall of the lock hub (5), and the received front When the stopper (3) is retracted, the front stopper (3) is clamped in a state of being slightly lifted from the bottom of the lock hub to secure a gas passage. By providing a plurality of protrusions (18) and a plurality of protrusions (24) for delaying the invasion of the chemical solution in the annular valleys (19) sandwiched between the plurality of annular ribs of the front stopper (3), complete removal before injection is achieved. The present invention has been completed through further research.

すなわち本発明は、
[1]
前端(20)および後端(21)が開口した筒状容器(1)、その筒状容器(1)内に気密性且つ液密性の薬液充填室(2)を設けるためにそれぞれ複数の環状リブ(15)、(25)を有して筒状容器(1)内にそれぞれ摺動自在に挿入されたフロントストッパー(3)およびエンドストッパー(4)、エンドストッパー(4)に接続が可能なプランジャーロッド(6)、筒状容器(1)の前端に嵌着され、プランジャーロッド(6)の押出時、筒状容器(1)から押し出されたフロントストッパー(3)を収容し、意図的に封入された気体(11)や薬液をその内壁とフロントストッパー(3)の側面との間隙から針基(9)方向に流すことができるロックハブ(5)およびロックハブ(5)に嵌合することができる注射針(7)を含んで構成されるプレフィラブルシリンジにおいて、ロックハブ(5)の内壁に、軸に沿って複数条の溝(23)と、収容したフロントストッパー(3)が後退したときフロントストッパー(3)を気体の通路を確保するためロックハブの底部から少し浮いた状態で挟持するよう複数の突起(18)を設け、フロントストッパー(3)の複数の環状リブにはさまれた環状谷間(19)に複数の突起(24)を設けてなるプレフィラブルシリンジ。
[2]フロントストッパーの底面(13)が中心軸に対して直交する平面であるか、又はフロントストッパーの底面(13)から外周面(14)への連結部(12)がフロントストッパー(3)の中心軸に対して線対称をなす斜面および/または凸状曲面の面取部を形成している[1]記載のプレフィラブルシリンジ。
[3]連結部(12)が面取部を形成し、フロントストッパーの底面(13)及び外周面(14)におけるそれぞれの面取開始線が、面取部を有しない場合の底面外縁(A)からそれぞれフロントストッパー(3)の直径の1/10〜1/2、高さの1/20〜1/4の位置にある請求項2記載のプレフィラブルシリンジ。
である。
That is, the present invention
[1]
A cylindrical container (1) having an open front end (20) and a rear end (21), and a plurality of annular shapes for providing an airtight and liquid-tight drug solution filling chamber (2) in the cylindrical container (1). It is possible to connect to the front stopper (3), the end stopper (4), and the end stopper (4) that have ribs (15) and (25) and are slidably inserted into the cylindrical container (1). The plunger rod (6) is fitted to the front end of the cylindrical container (1) and accommodates the front stopper (3) pushed out from the cylindrical container (1) when the plunger rod (6) is pushed out. The gas (11) and the chemical solution enclosed in the lock are fitted to the lock hub (5) and the lock hub (5) that can flow in the direction of the needle base (9) from the gap between the inner wall and the side surface of the front stopper (3). Including a needle (7) that can In the prefillable syringe configured, a plurality of grooves (23) on the inner wall of the lock hub (5) and the front stopper (3) accommodated in the inner wall of the lock hub (5) are retracted, and the front stopper (3) passes through the gas passage. A plurality of protrusions (18) are provided so as to be held slightly floating from the bottom of the lock hub, and a plurality of protrusions (19) are provided in the annular valley (19) sandwiched between the plurality of annular ribs of the front stopper (3). A prefillable syringe provided with 24).
[2] The bottom surface (13) of the front stopper is a plane orthogonal to the central axis, or the connecting portion (12) from the bottom surface (13) of the front stopper to the outer peripheral surface (14) is the front stopper (3). The prefillable syringe according to [1], wherein an inclined surface and / or a convex chamfered portion that are line-symmetric with respect to the central axis of the surface are formed.
[3] The connecting portion (12) forms a chamfered portion, and each of the chamfering start lines on the bottom surface (13) and the outer peripheral surface (14) of the front stopper has a chamfered portion. The prefillable syringe according to claim 2, which is located at 1/10 to 1/2 of the diameter of the front stopper (3) and 1/20 to 1/4 of the height.
It is.

本発明に係わるプレフィラブルシリンジは、図1に示すように、前端(20)および後端(21)が開口した筒状容器(1)、その筒状容器(1)内に薬液を密封する薬液充填室(2)を設けるために摺動自在に挿入されたフロントストッパー(3)、およびエンドストッパー(4)、エンドストッパー(4)に接続可能なプランジャーロッド(6)、プランジャーの押圧によりシリンジ先端から押し出されたフロントストッパー(3)を収容すると共に、その内壁に空気や薬液を針先方向に流出させることができる数条の溝を設けたロックハブ(5)および注射針(7)から構成されている。
シリンジを使用する前、ロックハブ(5)内には通常空気のみが存在している。薬液充填室(2)には溶液、懸濁液、乳液などの薬液が充填されているが、例えば、破傷風ワクチン、三種混合ワクチン、日本脳炎ワクチンなど、使用直前に薬液を均一に混合する必要のある薬液を充填した場合は、シリンジ反転時の混合を容易にするために少量(0.01〜1.0mL)の気体(11)、通常は空気、が封入されている。保存時フロントストッパー(3)およびエンドストッパー(4)は薬液充填室(2)の前後の液密性を保持して挿入されているので薬液が外に漏出することはない。
As shown in FIG. 1, the prefillable syringe according to the present invention seals a chemical solution in a cylindrical container (1) having an open front end (20) and a rear end (21), and the cylindrical container (1). Front stopper (3) slidably inserted to provide the chemical solution filling chamber (2), end stopper (4), plunger rod (6) connectable to the end stopper (4), plunger push The lock hub (5) and the injection needle (7) which accommodates the front stopper (3) pushed out from the tip of the syringe by the air and provided with several grooves on the inner wall of the front stopper (3) can flow out in the direction of the needle tip It is composed of
Before using the syringe, there is usually only air in the lock hub (5). The drug solution filling chamber (2) is filled with drug solutions such as solutions, suspensions, and emulsions. For example, tetanus vaccine, triple vaccine, and Japanese encephalitis vaccine need to be mixed evenly just before use. When a certain chemical solution is filled, a small amount (0.01 to 1.0 mL) of gas (11), usually air, is enclosed in order to facilitate mixing during syringe reversal. During storage, the front stopper (3) and the end stopper (4) are inserted while maintaining the liquid-tightness before and after the chemical solution filling chamber (2), so that the chemical solution does not leak out.

注射に際しては、図2に示すように、薬液混合後、まずプランジャーロッド(6)を押し上げるとその押圧によりフロントストッパー(3)が前進し、本発明のフロントストッパーの底面(13)の構造に起因して勢いよく飛び出すように筒状容器(1)の先端からロックハブ(5)内の奥深い位置に移動し、収容される。ロックハブ(5)の内壁には、軸に沿って複数条の溝(23)と、収容したフロントストッパー(3)が自重で後退したときフロントストッパー(3)を傾きなく少し浮かせた状態で挟持するよう複数の突起(18)が設けられており、気体および薬液がその溝を通って針基(9)に流出することができる構造になっている。したがってプランジャーロッド(6)の押圧によりまずフロントストッパー(3)がロックハブ(5)内に移動し、封入されていた気体(11)が溝(23)やフロントストッパー(3)の外周とロックハブ(5)との間隙を通って針先から外部に誘導、放出され、つづいて薬液も同じ経路で針の先端に達する。   For injection, as shown in FIG. 2, after mixing the chemical solution, when the plunger rod (6) is first pushed up, the front stopper (3) moves forward by the pushing, and the structure of the bottom surface (13) of the front stopper of the present invention is obtained. As a result, it moves from the tip of the cylindrical container (1) to a deep position in the lock hub (5) so as to jump out vigorously and is accommodated. On the inner wall of the lock hub (5), when the plurality of grooves (23) and the stored front stopper (3) are retracted by their own weight along the axis, the front stopper (3) is held in a slightly floating state without tilting. A plurality of projections (18) are provided, and the gas and the chemical liquid can flow out to the needle base (9) through the groove. Therefore, when the plunger rod (6) is pressed, the front stopper (3) is first moved into the lock hub (5), and the enclosed gas (11) is transferred to the groove (23), the outer periphery of the front stopper (3) and the lock hub ( 5) is guided and released from the needle tip to the outside through the gap with 5), and then the chemical solution reaches the tip of the needle through the same route.

フロントストッパー(3)は、その複数の環状リブ(15)にはさまれた環状谷間(19)に薬液の素早い回りを遅らせるための複数の突起(24)を設けてあるので、脱気操作時、フロントストッパー(3)のリブの谷間(19)への薬液の廻りが遅らされ、気体はフロントストッパー(3)の前進とともに円滑にロックハブ(5)とフロントストッパー(3)の隙間や溝(23)を通って針先から外に放出される。突起(24)の数は、一つの環状谷間(19)に3〜12個、好ましくは、4〜8個である。
フロントストッパー(3)の上面は、平坦でもよくまた気体や薬液の流出を容易にするため上面周縁に面取部や1〜数個の切り欠き(17)または突起を設けてもよい。
フロントストッパー(3)およびエンドストッパー(4)の素材としてはノルマルブチルゴム、ハロゲン化ブチルゴム、ブタジエンゴム、イソプレンゴム、イソブチレンゴムなどの弾性ゴム材料が挙げられるが、通常ハロゲン化ブチルゴムが用いられる。
それぞれのストッパーは摺動を円滑にし、且つ液密性を高めるため通常1〜数本の環状リブ(15)、(25)が設けられている。
フロントストッパー(3)およびエンドストッパー(4)の上面、下面には、洗浄時の水によるストッパー同士の付着を防止するために複数個、とくに2〜6個の小突起(16)が設けられていてもよい。
The front stopper (3) is provided with a plurality of protrusions (24) for delaying the rapid rotation of the chemical solution in the annular valley (19) sandwiched between the plurality of annular ribs (15). , The liquid around the ribs (19) in the ribs of the front stopper (3) is delayed, and the gas smoothly moves between the lock hub (5) and the front stopper (3) as the front stopper (3) advances. 23) and is discharged out of the needle tip. The number of the protrusions (24) is 3 to 12, preferably 4 to 8, in one annular valley (19).
The upper surface of the front stopper (3) may be flat, and a chamfered portion or one to several notches (17) or protrusions may be provided on the periphery of the upper surface in order to facilitate the outflow of gas or chemicals.
Examples of the material of the front stopper (3) and the end stopper (4) include elastic rubber materials such as normal butyl rubber, halogenated butyl rubber, butadiene rubber, isoprene rubber, and isobutylene rubber. Usually, halogenated butyl rubber is used.
Each stopper is usually provided with one to several annular ribs (15) and (25) in order to facilitate sliding and improve liquid tightness.
On the upper and lower surfaces of the front stopper (3) and end stopper (4), a plurality of, especially 2 to 6 small protrusions (16) are provided to prevent the stoppers from adhering to each other due to water during cleaning. May be.

図3に示されるように、ロックハブ(5)の内壁面には、押圧によりフロントストッパー(3)がロックハブ(5)内に収容されたとき気体や薬液の通路を確保するために、シリンジの軸方向と平行に1〜16本、好ましくは3〜8本の溝(23)が設けられている。これらの溝は、図3−Bに示されるように、針基との連結部(22)にかけて周囲から放射状に集合する。又ロックハブの内壁には、フロントストッパー(3)が後退した折、フロントストッパー(3)を傾きなくかつその底部に気体や薬液の移動を容易にするために必要な程度の間隙を残して収容しうるように複数箇、通常3〜8箇の突起(18)を形成させる。   As shown in FIG. 3, on the inner wall surface of the lock hub (5), when the front stopper (3) is housed in the lock hub (5) by pressing, the shaft of the syringe is secured to secure a passage for gas and chemicals. 1 to 16, preferably 3 to 8 grooves (23) are provided in parallel to the direction. As shown in FIG. 3B, these grooves gather radially from the periphery over the connecting portion (22) with the needle base. When the front stopper (3) is retracted on the inner wall of the lock hub, the front stopper (3) is accommodated without tilting and leaving the gap at the bottom to facilitate the movement of gas and chemicals. A plurality of, usually 3-8, protrusions (18) are formed as possible.

本発明の特徴をなす部分は、上述のフロントストッパー(3)の構造とロックハブ(5)の構造にあるが、そのほかにフロントストッパーの連結部(12)の構造にも工夫がある。
すなわちフロントストッパーの底面(13)から外周面(14)にかけての連結部(12)が、外縁の切り欠きがなく、且つフロントストッパー(3)の中心軸に対して直交する平面であるか、中心軸に対して線対称をなす斜面(図7)または凸状曲面からなる面取り部(12)を構成していることである。このフロントストッパー(3)の底部の構造により、脱気操作時、プランジャーからの押圧でフロントストッパー(3)は飛び出すようにロックハブ(5)の奥まで(針基に近い位置)移動し、フロントストッパー(3)の底部は、筒状容器(1)の先端開口部と間隙をもって収容される(図4)。この筒状容器(1)の先端開口部とフロントストッパー(3)下部の間に生じた隙間から、気体(11)がロックハブ(5)の内壁に設けられた溝(23)や、フロントストッパーの外周面(14)とロックハブ(5)の内壁の間隙を通り抜けて円滑に針基(9)に移行する。又ロックハブの内壁には、複数個の軸に沿った小突起(18)がもうけられているので、フロントストッパー(3)が後退した折、フロントストッパー(3)を傾きなく、かつその底面に空気や薬液の移動を容易にするために必要な程度の間隙を残して収容することができる。その結果、封入されていた空気や薬液は、スムースに針の方向に移動する。
The parts that characterize the present invention lie in the structure of the front stopper (3) and the structure of the lock hub (5), but the structure of the connecting portion (12) of the front stopper is also devised.
That is, the connecting portion (12) from the bottom surface (13) to the outer peripheral surface (14) of the front stopper is a flat surface that has no notch on the outer edge and is orthogonal to the central axis of the front stopper (3). That is, it forms a chamfered portion (12) composed of a slope (FIG. 7) or a convex curved surface that is line-symmetric with respect to the axis. Due to the structure of the bottom of the front stopper (3), the front stopper (3) moves to the back of the lock hub (5) (position close to the needle base) so as to pop out by pressing from the plunger during deaeration operation. The bottom of the stopper (3) is accommodated with a gap from the tip opening of the cylindrical container (1) (FIG. 4). From the gap formed between the front end opening of the cylindrical container (1) and the lower part of the front stopper (3), the gas (11) flows into the groove (23) provided on the inner wall of the lock hub (5) or the front stopper. It passes through the gap between the outer peripheral surface (14) and the inner wall of the lock hub (5) and smoothly transitions to the needle base (9). Since the inner wall of the lock hub is provided with small projections (18) along a plurality of axes, the front stopper (3) is not tilted and the bottom of the front stopper (3) is not inclined. And can be accommodated leaving a gap of a necessary degree to facilitate the movement of the chemical solution. As a result, the enclosed air or chemical moves smoothly in the direction of the needle.

これに対し、図8に示されるように、公知のフロントストッパーの底面構造が外周面と底面の接する角の2〜4個所に切り欠き(17)を設けたものは、フロントストッパーがロックハブ(5)内に移行する際に気体の一部が切り欠きを通ってロックハブ内に漏れるため、薬液充填室にあまり圧力が掛からず、フロントストッパー(3)が勢いよく飛び出さないのでロックハブ(5)の奥にまで収容され難い。その結果、筒状容器(1)先端の開口部と切り欠きを有するフロントストッパー底部付近に気泡が残留する率が高まる。   On the other hand, as shown in FIG. 8, when the bottom structure of a known front stopper is provided with notches (17) at two to four corners where the outer peripheral surface and the bottom surface are in contact, the front stopper has a lock hub (5 ) As part of the gas passes through the notch and leaks into the lock hub when moving into the lock hub, pressure is not applied to the chemical solution filling chamber and the front stopper (3) does not pop out vigorously, so the lock hub (5) It is difficult to be housed in the back. As a result, the rate at which bubbles remain in the vicinity of the bottom of the front stopper having the opening and notch at the tip of the cylindrical container (1) increases.

図7に示されるように、フロントストッパー(3)の下部の連結部(12)が面取部構成している場合、フロントストッパーの底面(13)及び外周面(14)におけるそれぞれの面取開始線が、面取部を有しない場合の底面外縁(A)からそれぞれフロントストッパー(3)の直径の1/10〜1/2、好ましくは1/5〜1/3、高さの1/20〜1/4、好ましくは1/10〜1/4(すなわち、図7のフロントストッパーの中軸断面図におけるA点からX点の長さがフロントストッパーの直径の1/10〜1/2、好ましくは1/5〜1/3であり、A点からY点の長さがフロントストッパーの高さの1/20〜1/4、好ましくは1/10〜1/4)であると、気泡残存率は極めて低くなる。面取り部に形成させる斜面は、単斜面に限らず、2〜複数の斜面、すなわち、多段の傾斜面を形成させてもよい。
面取部(12)が凸状曲面を構成している場合、曲面は中軸断面図において中軸線に対称な円弧又は、楕円弧を形成するものが好ましい。面取部(12)が、斜面と、凸状曲面を組み合わせたものでもよい。
また、フロントストッパー(3)の少なくとも面取部と底面を含む部分をフッ素樹脂で被覆しておくと、脱気は一層容易となる。フッソ樹脂の被覆層の厚みは、10〜100μm程度である。
As shown in FIG. 7, when the lower connecting portion (12) of the front stopper (3) forms a chamfered portion, the chamfering starts on the bottom surface (13) and the outer peripheral surface (14) of the front stopper. When the wire does not have a chamfered portion, the diameter of the front stopper (3) from the bottom outer edge (A) is 1/10 to 1/2, preferably 1/5 to 1/3, and 1/20 of the height. ~ 1/4, preferably 1/10 to 1/4 (that is, the length from the point A to the point X in the central axis sectional view of the front stopper of FIG. 7 is 1/10 to 1/2 of the diameter of the front stopper, preferably Is 1/5 to 1/3, and when the length from the point A to the point Y is 1/20 to 1/4, preferably 1/10 to 1/4) of the height of the front stopper, bubbles remain The rate is very low. The slope formed in the chamfered portion is not limited to a single slope, and two or more slopes, that is, a multi-stage slope may be formed.
When the chamfered portion (12) forms a convex curved surface, it is preferable that the curved surface forms a circular arc or an elliptical arc that is symmetrical with respect to the central axis in the sectional view of the central axis. The chamfered portion (12) may be a combination of a slope and a convex curved surface.
Degassing is further facilitated by covering at least the portion including the chamfered portion and the bottom surface of the front stopper (3) with a fluororesin. The thickness of the coating layer of the fluorine resin is about 10 to 100 μm.

エンドストッパー(4)の形状は、従来から使用されているものと同形でよく、摺動性と気密性、液密性を備えたものであれば特に限定されない。液密性を高めるため、1〜4周程度の環状リブ(25)を備えたものがよい。
針キャップ(8)、ロックハブ(5)、フィンガーグリップ(10)、プランジャーロッド(6)の形状、材質は、従来品のものでよく、たとえば、ポリプロピレンなどのような硬質プラスチックが用いられる。筒状容器(1)は、ガラス又は透明な硬質プラスチックが適している。
薬液投与前の脱気は、シリンジの針(7)を斜め上方に向け、ゆっくりとプランジャーロッド(6)を押し上げ、フロントストッパー(3)がロックハブ(5)内に収容されるのを確認してから更にプランジャーロッド(6)を押し上げると、気泡はフロントストッパー(3)の底部に残留することなくスムースに針先から排出される。
The shape of the end stopper (4) may be the same as that conventionally used, and is not particularly limited as long as it has slidability, air tightness, and liquid tightness. In order to improve liquid-tightness, the thing provided with the cyclic | annular rib (25) of about 1-4 circumferences is good.
The shape and material of the needle cap (8), the lock hub (5), the finger grip (10), and the plunger rod (6) may be conventional ones, and for example, a hard plastic such as polypropylene is used. As the cylindrical container (1), glass or transparent hard plastic is suitable.
For deaeration before drug administration, point the syringe needle (7) diagonally upward and slowly push up the plunger rod (6) to confirm that the front stopper (3) is housed in the lock hub (5). When the plunger rod (6) is further pushed up after that, the bubbles are smoothly discharged from the needle tip without remaining at the bottom of the front stopper (3).

本発明によれば、シリンジの薬液充填室(2)に封入された気泡を使用直前に脱気する際、気泡(11)の一部がフロントストッパー(3)の下部周辺に付着したまま薬液が針先に移行するという、いわゆる気泡残留現象を、ほぼ確実に防止することができ、かつ薬液を円滑に注射することができる。   According to the present invention, when the bubbles enclosed in the drug solution filling chamber (2) of the syringe are degassed immediately before use, the drug solution remains with a part of the bubbles (11) attached to the lower periphery of the front stopper (3). The so-called bubble residual phenomenon of shifting to the needle tip can be almost certainly prevented, and the drug solution can be injected smoothly.

以下に実施例と実験例を挙げて本発明を具体的に説明する。   The present invention will be specifically described below with reference to examples and experimental examples.

薬剤調製タンク中で1mLあたり精製百日せきワクチン含量が8国際単位以上、ジフテリアトキソイド含量が約30Lf及び破傷風トキソイド含量が約5Lf (Limit of flocculation)になるよう各ワクチン原液を添加した後、緩衝性の生理食塩液で希釈混合した。ついで1mLあたりフェノキシエタノール含量が3.5〜6.4μL(好ましくは5μL)となるよう添加した後、アルミニウム塩を1mLあたり0.2mgとなるよう加え、水酸化ナトリウム液でpHを5.4〜7.4の範囲になるよう調整した。この液をプレフィラブルシリンジに0.62〜0.67mL充填し、沈降精製百日せきジフテリア破傷風混合ワクチンキットとした。
沈降精製百日せきジフテリア破傷風混合ワクチン(1mL中)の処方
精製百日せきワクチン 8国際単位以上
ジフテリアトキソイド 約30Lf
破傷風トキソイド 約5Lf
アルミニウム塩 0.2mg
水酸化ナトリウム液 適量
フェノキシエタノール 5μL
緩衝性の生理食塩液 適量
After each vaccine stock solution is added so that the purified pertussis vaccine content per mL is 8 international units or more in the drug preparation tank, the diphtheria toxoid content is about 30 Lf, and the tetanus toxoid content is about 5 Lf (Limit of flocculation). Diluted with physiological saline solution. Next, after adding phenoxyethanol content to 3.5 to 6.4 μL (preferably 5 μL) per mL, aluminum salt was added to 0.2 mg per mL, and the pH was adjusted to 5.4 to 7 with sodium hydroxide solution. Adjusted to be in the range of .4. 0.62 to 0.67 mL of this solution was filled in a prefillable syringe to prepare a sedimentation-purified pertussis diphtheria tetanus mixed vaccine kit.
Prescription of precipitated purified pertussis diphtheria tetanus mixed vaccine (in 1 mL) Purified pertussis vaccine 8 international units or more diphtheria toxoid about 30 Lf
Tetanus toxoid about 5Lf
Aluminum salt 0.2mg
Sodium hydroxide solution appropriate amount Phenoxyethanol 5μL
Buffered saline solution

薬剤調製タンク中で1mLあたりの不活化日本脳炎ウイルスがたん白含量として80μg以下となるよう緩衝性の生理食塩液で希釈混合し、ついで1mLあたりフェノキシエタノール含量が3.5〜6.4μL(好ましくは5μL)及びポリソルベート80含量が0.25μLとなるよう添加調整した。この液をプレフィラブルシリンジに0.62〜0.67mL充填し、日本脳炎ワクチンキットとした。
日本脳炎ワクチン(1mL中)の処方
不活化日本脳炎ウイルス(たん白量) 80μg以下
ポリソルベート80 0.25μL
フェノキシエタノール 5μL
緩衝性の生理食塩液 適量
〔実験例1〕
In a drug preparation tank, the inactivated Japanese encephalitis virus per mL is diluted and mixed with a buffered physiological saline so that the protein content is 80 μg or less, and then the phenoxyethanol content per mL is 3.5 to 6.4 μL (preferably 5 μL) and polysorbate 80 content was adjusted to 0.25 μL. 0.62 to 0.67 mL of this solution was filled into a prefillable syringe to prepare a Japanese encephalitis vaccine kit.
Formula of Japanese encephalitis vaccine (in 1 mL) Inactivated Japanese encephalitis virus (protein amount) 80 μg or less Polysorbate 80 0.25 μL
Phenoxyethanol 5μL
Buffered saline solution
[Experimental Example 1]

図1、図5及び7図に示したように、複数の環状リブ(15)にはさまれた環状谷間(19)に複数の突起(24)を持ち、直径7.3mm、高さ6mmで、底面及び外周面における面取開始点が、面取部を有しない場合の底面外縁点Aからそれぞれ1.5mm、0.5mmの面取部(12)を有し、且つその面取部の外周面との接点にR0.1の円弧状面取部を有したフロントストッパー及びロックハブ(5)の内壁に、軸に沿って複数条の溝(23)及び収容したフロントストッパー(3)が後退したときフロントストッパー(3)を気体の通路を確保するためロックハブの底部から少し浮いた状態で挟持するよう複数の突起(18)を設けたシリンジ(本発明品)、図8に示した底面に3カ所の切り欠き(17)があり、直径7.3mm、高さ6mmのフロントストッパーを持ち、溝(23)及び突起(24)を有しないロックハブを持つシリンジ(従来品)及び突起(24)、ロックハブ(5)の内壁の溝(23)及び突起(18)を有しない以外は本発明品と同じ構成のシリンジ(比較品)のそれぞれ90本に、実施例2の日本脳炎ワクチンを0.67mLずつ充填し、静置した。
シリンジを取り出し、手で3回反転し、液を振り混ぜて均等に分散させた後、シリンジからキャップを外した。先端を上に約30〜45度斜めにして、プランジャーロッドをゆっくりと押し、フロントストッパーをロックハブ内に移動させ、気泡を抜く操作をした。この脱泡操作の後、目視にて残留気泡の存在の有無を確かめた。
その結果、従来品では、90本中、4本に、比較品では90本中、2本にそれぞれ外部から容易に確認できる大きさの気泡が残留したのに対して、本発明品の場合は、90本中気泡が残留したものは全くなかった。
〔実験例2〕
As shown in FIGS. 1, 5 and 7, a plurality of protrusions (24) are provided in an annular valley (19) sandwiched between a plurality of annular ribs (15), and the diameter is 7.3 mm and the height is 6 mm. The chamfer start points on the bottom surface and the outer peripheral surface have chamfered portions (12) of 1.5 mm and 0.5 mm from the bottom surface outer edge point A when the chamfered portion is not provided, and A plurality of grooves (23) and the housed front stopper (3) are retracted along the inner wall of the front stopper and the lock hub (5) having an arc chamfered portion of R0.1 at the contact point with the outer peripheral surface. A syringe (invention product) provided with a plurality of protrusions (18) so as to hold the front stopper (3) in a state of being slightly lifted from the bottom of the lock hub in order to secure a gas passage, on the bottom surface shown in FIG. There are 3 notches (17), diameter 7.3m A syringe (conventional product) having a front stopper with a height of 6 mm and having a lock hub not having the groove (23) and the protrusion (24) and the protrusion (24), the groove (23) and the protrusion ( Each of the 90 syringes (comparative products) having the same configuration as the product of the present invention except for having no 18) was filled with 0.67 mL of the Japanese encephalitis vaccine of Example 2 and allowed to stand.
The syringe was taken out, inverted by hand three times, and the liquid was shaken and dispersed evenly, and then the cap was removed from the syringe. The tip was tilted upward by about 30 to 45 degrees, the plunger rod was slowly pushed, the front stopper was moved into the lock hub, and air bubbles were removed. After this defoaming operation, the presence or absence of residual bubbles was visually confirmed.
As a result, in the conventional product, bubbles of a size that can be easily confirmed from the outside remained in four out of 90 in the conventional product and in two in 90 in the comparative product, whereas in the case of the present product, None of the 90 bubbles remained.
[Experimental example 2]

実験例1と同様にして、実施例1の沈降精製百日せきジフテリア破傷風混合ワクチンをシリンジに充填し、実験例1と同様にして比較品と本発明品における気泡を抜く実験を行った。
その結果、比較品では、90本中、1本に外部から容易に確認できる大きさの気泡が残留したのに対して、本発明品の場合は、90本中気泡が残留したものは全くなかった。
In the same manner as in Experimental Example 1, the precipitated purified pertussis diphtheria tetanus mixed vaccine of Example 1 was filled into a syringe, and an experiment was conducted in the same manner as in Experimental Example 1 to remove bubbles in the comparative product and the product of the present invention.
As a result, in the comparative product, one of 90 bubbles remained in a size that could be easily confirmed from the outside, whereas in the case of the present invention, none of the 90 bubbles remained. It was.

本発明のプレフィラブルシリンジは、たとえば、沈降破傷風トキソイドワクチンなどのように、静置しておいた場合に沈降物が認められるような注射液に、投与直前にシリンジ内の薬液を均一に混合するために薬液収容部に意図的に空気を挿入しておき、シリンジを数回反転させてよく混合する用に設計された注射器に適して効果がある。   The prefillable syringe of the present invention uniformly mixes the drug solution in the syringe immediately before administration with an injection solution in which a precipitate is observed when left standing, such as a sedimented tetanus toxoid vaccine. In order to do this, there is an effect suitable for a syringe designed to mix air by intentionally inserting air into the drug solution container and inverting the syringe several times.

本発明のシリンジの保存時の状態(薬液充填室に気泡が封入された状態)を示す断面図Sectional drawing which shows the state at the time of the preservation | save of the syringe of this invention (The state by which the bubble was enclosed in the chemical | medical solution filling chamber) 本発明のシリンジの脱気を終えた時点での断面図Sectional drawing at the time of finishing deaeration of the syringe of the present invention 3−Aはフロントストッパー収容前のロックハブ断面図、3−Bは筒状容器の方から見た端面図3-A is a cross-sectional view of the lock hub before the front stopper is accommodated, and 3-B is an end view as viewed from the cylindrical container. ロックハブと収容されたフロントストッパーの透視図Perspective view of lock hub and housed front stopper 図4のフロントストッパーの下方から視た斜視図The perspective view seen from the lower part of the front stopper of FIG. 6−Aはフロントストッパーの底面図、6−Bはフロントストッパーの縦断面図および6−Cはフロントストッパーの頂部図6-A is a bottom view of the front stopper, 6-B is a longitudinal sectional view of the front stopper, and 6-C is a top view of the front stopper. 面取部が斜面であるフロントストッパーの断面図Cross section of front stopper with chamfered chamfer 従来のフロントストッパーの斜視図A perspective view of a conventional front stopper

符号の説明Explanation of symbols

1 筒状容器
2 薬液充填室
3 フロントストッパー
4 エンドストッパー
5 ロックハブ
6 プランジャーロッド
7 注射針
8 針キャップ
9 針基
10 フィンガーグリップ
11 気泡
12 フロントストッパーの面取部
13 フロントストッパーの底面
14 フロントストッパーの外周面
15 フロントストッパーの環状リブ
16 フロントストッパー上面、底面の付着防止小突起
17 フロントストッパー上面部の切り欠き
18 ロックハブ内壁に設けられた突起
19 環状リブに挟まれた環状谷間
20 筒状容器の前端
21 筒状容器の後端
22 ロックハブと針基との連結部
23 ロックハブ内壁に設けられた溝
24 フロントストッパーの環状谷間に設けられた突起
25 エンドストッパーの環状リブ
図7におけるAは、面取部が無い場合のフロントストッパー縦断面図における
底面の外縁点
図7におけるXは、フロントストッパー縦断面図における底面の面取開始点
図7におけるYは、フロントストッパー縦断面図における外周面の面取開始点
1 cylindrical container
2 Chemical solution filling room
3 Front stopper
4 End stopper
5 Lock hub
6 Plunger rod
7 Injection needle
8 Needle cap
9 Needle base
DESCRIPTION OF SYMBOLS 10 Finger grip 11 Air bubbles 12 Front stopper chamfer 13 Front stopper bottom surface 14 Front stopper outer peripheral surface 15 Front stopper annular rib 16 Front stopper top surface and bottom surface adhesion prevention protrusion 17 Front stopper top surface notch 18 Lock hub Protrusions provided on the inner wall 19 Annular valleys sandwiched between annular ribs 20 Front end of the cylindrical container 21 Rear end of the cylindrical container 22 Connecting portion between the lock hub and the needle base 23 Groove provided on the inner wall of the lock hub 24 Annular front stopper Projection provided in the valley 25 Annular rib of the end stopper A in FIG. 7 is an outer edge point of the bottom surface in the front stopper longitudinal section when there is no chamfered portion X in FIG. 7 is a surface of the bottom surface in the longitudinal section of the front stopper Starting point Y in Fig. 7 Chamfering starting point of the outer peripheral surface of the front stopper longitudinal section

Claims (3)

前端(20)および後端(21)が開口した筒状容器(1)、その筒状容器(1)内に気密性且つ液密性の薬液充填室(2)を設けるためにそれぞれ複数の環状リブ(15)、(25)を有して筒状容器(1)内にそれぞれ摺動自在に挿入されたフロントストッパー(3)およびエンドストッパー(4)、エンドストッパー(4)に接続が可能なプランジャーロッド(6)、筒状容器(1)の前端に嵌着され、プランジャーロッド(6)の押出時、筒状容器(1)から押し出されたフロントストッパー(3)を収容し、意図的に封入された気体(11)や薬液をその内壁とフロントストッパー(3)の側面との間隙から針基(9)方向に流すことができるロックハブ(5)およびロックハブ(5)に嵌合することができる注射針(7)を含んで構成されるプレフィラブルシリンジにおいて、ロックハブ(5)の内壁に、軸に沿って複数条の溝(23)と、収容したフロントストッパー(3)が後退したときフロントストッパー(3)を挟持するよう複数の突起(18)を設け、フロントストッパー(3)の複数の環状リブの環状谷間(19)に複数の突起(24)を設けてなるプレフィラブルシリンジ。   A cylindrical container (1) having an open front end (20) and a rear end (21), and a plurality of annular shapes for providing an airtight and liquid-tight drug solution filling chamber (2) in the cylindrical container (1). It is possible to connect to the front stopper (3), the end stopper (4), and the end stopper (4) that have ribs (15) and (25) and are slidably inserted into the cylindrical container (1). The plunger rod (6) is fitted to the front end of the cylindrical container (1) and accommodates the front stopper (3) pushed out from the cylindrical container (1) when the plunger rod (6) is pushed out. The gas (11) and the chemical solution enclosed in the seal are fitted to the lock hub (5) and the lock hub (5) that can flow in the direction of the needle base (9) from the gap between the inner wall and the side surface of the front stopper (3). Including a needle (7) that can In the prefillable syringe constructed, the front stopper (3) is clamped when the plurality of grooves (23) and the accommodated front stopper (3) are retracted along the axis on the inner wall of the lock hub (5). A prefillable syringe provided with a plurality of protrusions (18) and a plurality of protrusions (24) in the annular valleys (19) of the plurality of annular ribs of the front stopper (3). フロントストッパーの底面(13)が中心軸に対して直交する平面であるか、又はフロントストッパーの底面(13)から外周面(14)への連結部(12)がフロントストッパー(3)の中心軸に対して線対称をなす斜面および/または凸状曲面の面取部を形成している請求項1記載のプレフィラブルシリンジ。   The bottom surface (13) of the front stopper is a plane perpendicular to the central axis, or the connecting portion (12) from the bottom surface (13) of the front stopper to the outer peripheral surface (14) is the central axis of the front stopper (3). The prefillable syringe according to claim 1, wherein a sloped surface and / or a chamfered portion of a convex curved surface that is line-symmetric with respect to the surface is formed. 連結部(12)が面取部を形成し、フロントストッパーの底面(13)及び外周面(14)におけるそれぞれの面取開始線が、面取部を有しない場合の底面外縁(A)からそれぞれフロントストッパー(3)の直径の1/10〜1/2、高さの1/20〜1/4の位置にある請求項2記載のプレフィラブルシリンジ。

The connecting portion (12) forms a chamfered portion, and the respective chamfer start lines on the bottom surface (13) and the outer peripheral surface (14) of the front stopper are respectively from the bottom surface outer edge (A) when the chamfered portion is not provided. The prefillable syringe according to claim 2, wherein the front stopper (3) is located at 1/10 to 1/2 of the diameter and 1/20 to 1/4 of the height.

JP2005225014A 2004-08-04 2005-08-03 Prefillable syringe Active JP4589193B2 (en)

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JP2005225014A JP4589193B2 (en) 2004-08-04 2005-08-03 Prefillable syringe

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012120585A (en) * 2010-12-06 2012-06-28 Fine Rubber Kenkyusho:Kk Syringe member, medical syringe using the syringe member, and method for manufacturing the syringe member
WO2022050613A1 (en) * 2020-09-07 2022-03-10 이오플로우(주) Liquid medicine infusion device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513677U (en) * 1974-06-26 1976-01-12
JPH08141091A (en) * 1994-11-18 1996-06-04 Arte:Kk Injector in common use as two chamber type vessel
JPH11155951A (en) * 1997-12-01 1999-06-15 Kaken Pharmaceut Co Ltd Decompression syringe and manufacture thereof
JP2002263186A (en) * 2001-03-09 2002-09-17 Takeda Chem Ind Ltd Gasket for bypass type pre-filled syringe
JP2004129723A (en) * 2002-10-08 2004-04-30 Arute:Kk Syringe serving also as container

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513677U (en) * 1974-06-26 1976-01-12
JPH08141091A (en) * 1994-11-18 1996-06-04 Arte:Kk Injector in common use as two chamber type vessel
JPH11155951A (en) * 1997-12-01 1999-06-15 Kaken Pharmaceut Co Ltd Decompression syringe and manufacture thereof
JP2002263186A (en) * 2001-03-09 2002-09-17 Takeda Chem Ind Ltd Gasket for bypass type pre-filled syringe
JP2004129723A (en) * 2002-10-08 2004-04-30 Arute:Kk Syringe serving also as container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012120585A (en) * 2010-12-06 2012-06-28 Fine Rubber Kenkyusho:Kk Syringe member, medical syringe using the syringe member, and method for manufacturing the syringe member
WO2022050613A1 (en) * 2020-09-07 2022-03-10 이오플로우(주) Liquid medicine infusion device
US11964128B2 (en) 2020-09-07 2024-04-23 Eoflow Co., Ltd. Liquid medicine injection device

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