JPWO2007129445A1 - Syringe, chemical injection device - Google Patents

Syringe, chemical injection device Download PDF

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Publication number
JPWO2007129445A1
JPWO2007129445A1 JP2008514373A JP2008514373A JPWO2007129445A1 JP WO2007129445 A1 JPWO2007129445 A1 JP WO2007129445A1 JP 2008514373 A JP2008514373 A JP 2008514373A JP 2008514373 A JP2008514373 A JP 2008514373A JP WO2007129445 A1 JPWO2007129445 A1 JP WO2007129445A1
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Prior art keywords
outer cylinder
syringe
inner cylinder
cylinder piston
piston
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JP2008514373A
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Japanese (ja)
Inventor
根本　茂
茂 根本
齋藤　尚
尚 齋藤
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Nemoto Kyorindo Co Ltd
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Nemoto Kyorindo Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/19—Syringes having more than one chamber, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31516—Piston or piston-rod constructions, e.g. connection of piston with piston-rod reducing dead-space in the syringe barrel after delivery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31596—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms comprising means for injection of two or more media, e.g. by mixing
    • A61M2005/31598—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms comprising means for injection of two or more media, e.g. by mixing having multiple telescopically sliding coaxial pistons encompassing volumes for components to be mixed
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/007—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests for contrast media

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

従来の注射器よりも簡単な構成で、複数の薬液を簡単に注入又は吸引可能なシリンジなどを提供する。吐出口５００を具備する外筒２００と、外筒２００の内部に設けられる１つ以上の内筒３００と、外筒２００に充填された薬液を吐出口５００に向けて押す外筒用ピストン７００と、内筒３００に充填された薬液を吐出口５００に向けて押す内筒用ピストン８００と、を備えたことを特徴とするシリンジ１００である。Provided is a syringe or the like capable of easily injecting or aspirating a plurality of drug solutions with a simpler configuration than a conventional syringe. An outer cylinder 200 having a discharge port 500, one or more inner cylinders 300 provided in the outer cylinder 200, and an outer cylinder piston 700 that pushes a chemical solution filled in the outer cylinder 200 toward the discharge port 500. The syringe 100 includes an inner cylinder piston 800 that pushes the chemical solution filled in the inner cylinder 300 toward the discharge port 500.

Description

本発明は、シリンジ及び薬液注入装置に関する。   The present invention relates to a syringe and a chemical liquid injector.

ＣＴ（Ｃｏｍｐｕｔｅｄ Ｔｏｍｏｇｒａｐｈｙ）スキャナ、ＭＲＩ（Ｍａｇｎｅｔｉｃ Ｒｅｓｏｎａｎｃｅ Ｉｍａｇｉｎｇ）装置、ＰＥＴ（Ｐｏｓｉｔｒｏｎ Ｅｍｉｓｓｉｏｎ Ｔｏｍｏｇｒａｐｈｙ）装置などの被験者の透視画像である断層画像を撮像する透視撮像装置や、ＣＴアンギオ装置、ＭＲＡ（ＭＲ Ａｎｇｉｏ）装置などの被験者の透視画像である血管画像を撮像する医療装置などを使用する際には、被験者に造影剤や生理食塩水などの薬液を注入などすることがある。この薬液の注入は、シリンジに充填された薬液がピストンに押されてシリンジの吐出口から吐出することにより行われるところ、従来、次のようなシリンジが提案された。すなわち、注射器のシリンダの内部に、シリンダと同軸に固定型小シリンダを設けており、外側のシリンダはドーナツ状の空間を有することになる注射器である（特許文献１の図２７参照）。この注射器においては、固定型小シリンダ内に、仕切部と小プランジャが、シリンダの方にはドーナツ状の仕切部と大プランジャがそれぞれ嵌装される。固定型小シリンダの仕切部と大プランジャとの間に室は、シリンダの仕切部と大プランジャとの間にはドーナツ状の室が形成され、これらの室にそれぞれ異なる注射剤が収容される（特許文献１の段落００６０参照）。
特開平８−３０８９２８号公報（特に図２７） CT (Computed Tomography) scanner, MRI (Magnetic Resonance Imaging) apparatus, PET (Positron Emission Tomography) apparatus, and the like, a fluoroscopic imaging apparatus that captures tomographic images that are fluoroscopic images of a subject, a CT angiography apparatus, and MRAo MRA When using a medical device that captures a blood vessel image that is a fluoroscopic image of a subject such as a subject, a medical solution such as a contrast medium or physiological saline may be injected into the subject. The injection of the chemical liquid is performed by pushing the chemical liquid filled in the syringe by the piston and discharging it from the discharge port of the syringe. Conventionally, the following syringe has been proposed. That is, a fixed small cylinder is provided inside the cylinder of the syringe coaxially with the cylinder, and the outer cylinder is a syringe having a donut-shaped space (see FIG. 27 of Patent Document 1). In this syringe, a partition portion and a small plunger are fitted into a fixed small cylinder, and a donut-shaped partition portion and a large plunger are fitted into the cylinder, respectively. A chamber is formed between the partition portion of the fixed type small cylinder and the large plunger, and a donut-shaped chamber is formed between the partition portion of the cylinder and the large plunger, and different injections are accommodated in these chambers ( (See paragraph 0060 of Patent Document 1).
JP-A-8-308928 (particularly FIG. 27)

しかしながら、上記従来の注射器は、上記したところからも明らかなように複雑な構成をしているため、これを動作させる際にも、複雑な工程を踏む必要がある。以下、上記従来の注射器を動作させる工程について説明する。
上記従来の注射器において、まず、押圧部を押して小プランジャを注射針に向けて押し込むと、室の圧力が上昇し、仕切部が注射針の方に移動する。仕切部の注射針側の空気は、貫通孔から室に入り、室の圧力を上げる。これに応じてドーナツ状の仕切部も注射針側に移動する。仕切部の左側にある空気は、空気抜きの孔から外部に排出される。仕切部が移動して貫通孔を越えると、貫通孔を通って室内の注射剤が室に入り、二つの注射剤が混合される。ドーナツ状の仕切部は、圧力の上昇に伴ってさらに注射針に向かって進行する（特許文献１の段落００６２参照）。
小プランジャの押圧部が、大プランジャの押圧部に重なると、大プランジャも一緒に注射針に向かって進みだす。これにより、室の圧力がさらに上昇し、ドーナツ状の仕切部は、やがて貫通孔の左側まで移動し、室と注射針とは貫通孔と端末連通部とを介して連通状態となる。この状態で針を上に向けて室内の空気を注射針から外部に排出し、その後、注射することになる。なお、貫通孔から針までの空間は、出来るだけ小さくなるように作り、注射液の残量を極力少量にするようにすべきである（特許文献１の段落００６３参照）。
以上説明したように、上記従来の注射器には、複雑な構成をしているため、これを動作させる際にも、複雑な工程を踏む必要があるという問題があった。
そこで、本発明は、従来の注射器よりも簡単な構成で、複数の薬液を簡単に注入又は吸引可能なシリンジ及び薬液注入装置を提供することを目的とする。However, since the conventional syringe has a complicated configuration as apparent from the above, it is necessary to take a complicated process when operating the syringe. Hereinafter, the process of operating the conventional syringe will be described.
In the conventional syringe, first, when the pressing portion is pushed and the small plunger is pushed toward the injection needle, the pressure in the chamber rises and the partition portion moves toward the injection needle. The air on the injection needle side of the partition enters the chamber through the through hole and raises the pressure in the chamber. In response to this, the donut-shaped partition also moves to the injection needle side. The air on the left side of the partition is discharged to the outside through the air vent hole. When the partition moves and passes through the through-hole, the injection in the room enters the chamber through the through-hole, and the two injections are mixed. The donut-shaped partition further advances toward the injection needle as the pressure increases (see paragraph 0062 of Patent Document 1).
When the pressing portion of the small plunger overlaps the pressing portion of the large plunger, the large plunger starts to move toward the injection needle together. Thereby, the pressure in the chamber further rises, and the donut-shaped partition portion eventually moves to the left side of the through hole, and the chamber and the injection needle are in communication with each other via the through hole and the terminal communication portion. In this state, the needle is directed upward, the room air is discharged from the injection needle to the outside, and then injection is performed. The space from the through hole to the needle should be made as small as possible so that the remaining amount of the injection solution is as small as possible (see paragraph 0063 of Patent Document 1).
As described above, since the conventional syringe has a complicated configuration, there is a problem that it is necessary to take a complicated process when operating the syringe.
Then, an object of this invention is to provide the syringe and chemical | medical solution injection | pouring apparatus which can inject | pour or suck a several chemical | medical solution easily with a structure simpler than the conventional syringe.

本発明によれば、上記した課題は、次の手段により解決される。   According to the present invention, the above-described problem is solved by the following means.

第１の発明は、吐出口を具備する外筒と、前記外筒の内部に設けられる１つ以上の内筒と、前記外筒に充填された薬液を前記吐出口に向けて押す外筒用ピストンと、前記内筒に充填された薬液を前記吐出口に向けて押す内筒用ピストンと、を備えたことを特徴とするシリンジである。
第1の発明によれば、外筒用ピストンを押せば外筒の内部に充填されている薬液を吐出し、外筒用ピストンを引けば外筒の内部に薬液が吸引することが可能である。また、第1の発明によれば、内筒用ピストンを押せば内筒の内部に充填されている薬液を吐出し、内筒用ピストンを引けば内筒の内部に薬液を吸引することが可能である。したがって、第1の発明によれば、従来の注射器よりも簡単な構成で、複数の薬液を簡単に注入又は吸引可能が可能となる。
内筒の数は２つ以上ある場合は、外筒の内側に内筒が設けられ、この内筒の内側に内筒が順次設けられる。
また、外筒用ピストン及び内筒用ピストンは、それぞれ外筒及び内筒に充填された薬液を吐出口に向けて押せれば足りる。もっとも、外筒用ピストン及び内筒用ピストンには、「押す」に加えて「引く」ことも可能なピストンが含まれる。本発明に係るシリンジは、外筒用ピストン及び内筒用ピストンを「押す」及び「引く」ことが可能な場合、薬液を注入可能なシリンジであるばかりでなく、薬液を含む液体を吸引可能なシリンジともなる。
なお、薬液とは、たとえば、ＣＴ（Ｃｏｍｐｕｔｅｄ Ｔｏｍｏｇｒａｐｈｙ）スキャナ、ＭＲＩ（Ｍａｇｎｅｔｉｃ Ｒｅｓｏｎａｎｃｅ Ｉｍａｇｉｎｇ）装置、ＰＥＴ（Ｐｏｓｉｔｒｏｎ Ｅｍｉｓｓｉｏｎ Ｔｏｍｏｇｒａｐｈｙ）装置などで被験者の透視画像である断層画像を撮像する場合に使用される造影剤や、ＣＴアンギオ装置やＭＲＡ（ＭＲ Ａｎｇｉｏ）装置などで被験者の透視画像である血管画像を撮像する場合に使用される造影剤をいう。The first invention is for an outer cylinder having a discharge port, one or more inner cylinders provided in the outer cylinder, and an outer cylinder that pushes a chemical solution filled in the outer cylinder toward the discharge port. A syringe comprising: a piston; and an inner cylinder piston that pushes a chemical solution filled in the inner cylinder toward the discharge port.
According to the first invention, if the outer cylinder piston is pushed, the chemical liquid filled in the outer cylinder is discharged, and if the outer cylinder piston is pulled, the chemical liquid can be sucked into the outer cylinder. . Further, according to the first invention, it is possible to discharge the chemical liquid filled in the inner cylinder by pushing the inner cylinder piston, and to suck the chemical liquid into the inner cylinder by pulling the inner cylinder piston. It is. Therefore, according to the first invention, it is possible to easily inject or suck a plurality of medicinal liquids with a simpler configuration than the conventional syringe.
When there are two or more inner cylinders, the inner cylinder is provided inside the outer cylinder, and the inner cylinders are sequentially provided inside the inner cylinder.
The outer cylinder piston and the inner cylinder piston need only be able to push the chemical solution filled in the outer cylinder and the inner cylinder toward the discharge port, respectively. However, the piston for the outer cylinder and the piston for the inner cylinder include a piston that can be “pulled” in addition to “push”. When the outer cylinder piston and the inner cylinder piston can be “pushed” and “pulled”, the syringe according to the present invention is not only a syringe capable of injecting a chemical solution but also capable of sucking a liquid containing the chemical solution. It can also be a syringe.
The chemical solution is, for example, a contrast agent used for imaging a tomographic image that is a fluoroscopic image of a subject using a CT (Computed Tomography) scanner, an MRI (Magnetic Resonance Imaging) apparatus, a PET (Positron Emission Tomography) apparatus, or the like. In addition, it refers to a contrast agent used when a blood vessel image, which is a fluoroscopic image of a subject, is imaged with a CT angio device or an MRA (MR Angio) device.

第２の発明は、前記外筒と前記内筒とが同心円状に設けられていることを特徴とする第１の発明に係るシリンジである。
第２の発明によれば、外筒と内筒とが同心円状に設けられるため、外筒からの薬液の注入に偏りが生じることを防止できる。A second invention is a syringe according to the first invention, wherein the outer cylinder and the inner cylinder are provided concentrically.
According to the second invention, since the outer cylinder and the inner cylinder are provided concentrically, it is possible to prevent a bias from occurring in the injection of the chemical solution from the outer cylinder.

第３の発明は、前記内筒を支持する支持部材が前記吐出口側に設けられていることを特徴とする第１の発明又は第２の発明に係るシリンジである。
第3の発明によれば、外筒から注入する薬液の量を制限することなく、内筒を支持することが可能となる。なお、支持部材は、内筒が1つである場合、内筒と外筒の間に支持部材を設けることが可能であり、内筒が2つ以上ある場合、内筒と外筒の間に支持部材を設けることが可能であるとともに、内筒と内筒の間にも設けることが可能である。A third invention is the syringe according to the first invention or the second invention, characterized in that a support member for supporting the inner cylinder is provided on the discharge port side.
According to the third invention, it is possible to support the inner cylinder without limiting the amount of the chemical liquid injected from the outer cylinder. The support member can be provided between the inner cylinder and the outer cylinder when the number of inner cylinders is one. When there are two or more inner cylinders, the support member can be provided between the inner cylinder and the outer cylinder. A support member can be provided, and can also be provided between the inner cylinder and the inner cylinder.

第４の発明は、前記吐出口から前記内筒に対する薬液の逆流を防止する弁を備えたことを特徴とする第１の発明〜第３の発明のいずれか１つに係るシリンジである。
第4の発明によれば、外筒用ピストンを引いた際に、薬液が内筒へ逆流することを防止することができる。4th invention is provided with the valve which prevents the back flow of the chemical | medical solution with respect to the said inner cylinder from the said discharge outlet, It is a syringe which concerns on any one of 1st invention-3rd invention characterized by the above-mentioned.
According to the fourth invention, when the outer cylinder piston is pulled, it is possible to prevent the chemical liquid from flowing back to the inner cylinder.

第５の発明は、前記外筒用ピストン及び前記内筒用ピストンの少なくとも一方の前記吐出側の形状が、山形状であることを特徴とする第１の発明〜第４の発明のいずれか１つに係るシリンジである。
第5の発明によれば、薬液を注入するために要する力を低減することができる。According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the shape of the discharge side of at least one of the outer cylinder piston and the inner cylinder piston is a mountain shape. It is the syringe which concerns on one.
According to the fifth aspect, the force required to inject the chemical solution can be reduced.

第６の発明は、前記外筒用ピストン及び前記内筒用ピストンの少なくとも一方の前記吐出側と反対側に、前記外筒用ピストン、前記内筒用ピストンを押す押部材の先端とロック可能なロック部が設けられている、ことを特徴とする第１の発明〜第５の発明のいずれか１つに係るシリンジである。
第6の発明によれば、外筒用ピストン及び内筒ピストンは、押すだけでなく引くことも可能となり、薬液の注入に加えて吸引も可能となる。According to a sixth aspect of the present invention, at least one of the outer cylinder piston and the inner cylinder piston can be locked to a distal end of a pressing member that pushes the outer cylinder piston and the inner cylinder piston. A syringe according to any one of the first to fifth inventions, wherein a lock portion is provided.
According to the sixth aspect of the invention, the outer cylinder piston and the inner cylinder piston can be pulled as well as pushed, and can be sucked in addition to the injection of the chemical solution.

第７の発明は、第１の発明〜第６の発明のいずれか１つに係るシリンジが取り付けられていることを特徴とする薬液注入装置である。
第７の発明に係る薬液注入装置は、上記従来の注射器が取り付けられた薬液注入装置と比較して、簡単に制御することができる。7th invention is the chemical injection device characterized by attaching the syringe which concerns on any one of 1st invention-6th invention.
The chemical injection device according to the seventh aspect of the invention can be easily controlled as compared with the chemical injection device to which the conventional syringe is attached.

本発明によれば、従来の注射器よりも簡単な構成で、複数の薬液を簡単に注入又は吸引することが可能である。   According to the present invention, it is possible to easily inject or suck a plurality of medicinal solutions with a simpler configuration than a conventional syringe.

本発明の実施の形態に係るシリンジ１００の概略斜視図である。It is a schematic perspective view of the syringe 100 which concerns on embodiment of this invention. 本発明の実施の形態に係るシリンジ１００のA-A断面図である。It is AA sectional drawing of the syringe 100 which concerns on embodiment of this invention. 本発明の他の実施の形態に係るシリンジ１００の断面図である。It is sectional drawing of the syringe 100 which concerns on other embodiment of this invention.

符号の説明Explanation of symbols

１００ シリンジ
２００ 外筒
３００ 内筒
４００ 支持部材
４１０ 貫通孔
５００ 吐出口
６００ 弁
７００ 外筒用ピストン
７１０ ロック部
８００ 内筒用ピストン
８１０ ロック部100 Syringe 200 Outer cylinder 300 Inner cylinder 400 Support member 410 Through hole 500 Discharge port 600 Valve 700 Outer cylinder piston 710 Lock portion 800 Inner cylinder piston 810 Lock portion

以下に、添付した図面を参照しつつ、本発明を実施するための最良の形態を詳細に説明する。   The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

図１は、本発明の実施の形態に係るシリンジ１００の概略斜視図であり、図２は、本発明の実施の形態に係るシリンジ１００のA-A断面図である。
図１、２に示すように、本発明の実施の形態に係るシリンジ１００は、外筒２００と内筒３００とを備えている。本発明は、外筒２００と内筒３００の位置関係を限定するものではないが、外筒２００と内筒３００とを同心円とすれば、外筒２００からの薬液の注入に偏りが生じることを防止できるので、好ましい。
内筒３００は、支持部材４００によって外筒２００に支持されており、外筒２００内で不要な動くことがない。なお、支持部材４００は、任意の位置に設けることができるが、吐出口５００と反対側に設けると、外筒用ピストン７００の移動が妨げられてしまい、外筒２００から注入する薬液の量が制限されてしまう。したがって、支持部材４００は、本実施の形態に係るシリンジ１００のように、吐出口５００側、特に、内筒３００の先端部分に設けることが好ましい。このようにしても、内筒３００の吐出口５００と反対側の部分は、外筒用ピストン７００と内筒用ピストン８００とに挟持されるため、外筒２００に対して大きく動いてしまうということは防止される。なお、支持部材４００には、貫通孔４１０が形成されているため、薬液の移動が支持部材４００によって遮断されることはない。
内筒３００の先端には弁６００が設けられており、薬液の逆流が防止されている。
外筒用ピストン７００と内筒用ピストン８００とは独立しており、外筒用ピストン７００だけで薬液を注入し吸引することが可能であるし、内筒ピストン８００だけで薬液を注入し吸引することが可能である。
図２に示す実施の形態においては、外筒用ピストン７００と内筒用ピストン８００の先端の形状が平坦に形成されているが、外筒用ピストン７００と内筒用ピストン８００はそれぞれ任意に形成でき、特に限定されるものではない。外筒用ピストン７００と内筒用ピストン８００の先端の形状は、たとえば図３に示すように山形状に形成でき、このようにすれば薬液を注入するために要する力を低減することができる。
なお、外筒用ピストン７００と内筒用ピストン８００との吐出口５００側とは反対側の面に、切り欠きや嵌合可能な凹凸などのロック部７１０、８１０を設け、薬液注入装置（図示せず）のプレッサーなどとロックさせれば、外筒用ピストン７００及び内筒用ピストン８００を押すだけではなく、引くことが可能となる。FIG. 1 is a schematic perspective view of a syringe 100 according to the embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the syringe 100 according to the embodiment of the present invention.
As shown in FIGS. 1 and 2, the syringe 100 according to the embodiment of the present invention includes an outer cylinder 200 and an inner cylinder 300. Although the present invention does not limit the positional relationship between the outer cylinder 200 and the inner cylinder 300, if the outer cylinder 200 and the inner cylinder 300 are concentric, there is a bias in the injection of the chemical solution from the outer cylinder 200. Since it can prevent, it is preferable.
The inner cylinder 300 is supported by the outer cylinder 200 by the support member 400 and does not move unnecessarily in the outer cylinder 200. The support member 400 can be provided at an arbitrary position. However, if the support member 400 is provided on the side opposite to the discharge port 500, the movement of the outer cylinder piston 700 is hindered, and the amount of the chemical injected from the outer cylinder 200 is reduced. It will be restricted. Therefore, it is preferable that the support member 400 is provided on the discharge port 500 side, particularly on the distal end portion of the inner cylinder 300, like the syringe 100 according to the present embodiment. Even in this case, the portion of the inner cylinder 300 opposite to the discharge port 500 is sandwiched between the outer cylinder piston 700 and the inner cylinder piston 800, and thus moves greatly with respect to the outer cylinder 200. Is prevented. In addition, since the support member 400 has the through-hole 410, the movement of the chemical solution is not blocked by the support member 400.
A valve 600 is provided at the tip of the inner cylinder 300 to prevent the back flow of the chemical solution.
The outer cylinder piston 700 and the inner cylinder piston 800 are independent, and the chemical liquid can be injected and sucked only by the outer cylinder piston 700, or the chemical liquid can be injected and sucked only by the inner cylinder piston 800. It is possible.
In the embodiment shown in FIG. 2, the outer cylinder piston 700 and the inner cylinder piston 800 are formed to have flat ends, but the outer cylinder piston 700 and the inner cylinder piston 800 are arbitrarily formed. There is no particular limitation. The tip shapes of the outer cylinder piston 700 and the inner cylinder piston 800 can be formed in a mountain shape as shown in FIG. 3, for example, and the force required to inject the chemical can be reduced.
In addition, lock portions 710 and 810 such as notches and fitting irregularities are provided on the surface opposite to the discharge port 500 side of the outer cylinder piston 700 and the inner cylinder piston 800, and a chemical solution injection device (FIG. If it is locked with a presser (not shown) or the like, the outer cylinder piston 700 and the inner cylinder piston 800 can be pulled as well as pushed.

以下、本発明の実施の形態に係るシリンジを用いて薬液を注入する方法の一例について説明する。
まず、外筒２００に生理食塩水を収容し、内筒３００に造影剤を収容する。ここで、造影剤とは、ＣＴ（Ｃｏｍｐｕｔｅｄ Ｔｏｍｏｇｒａｐｈｙ）スキャナ、ＭＲＩ（Ｍａｇｎｅｔｉｃ Ｒｅｓｏｎａｎｃｅ Ｉｍａｇｉｎｇ）装置、ＰＥＴ（Ｐｏｓｉｔｒｏｎ Ｅｍｉｓｓｉｏｎ Ｔｏｍｏｇｒａｐｈｙ）装置などで被験者の透視画像である断層画像を撮像する場合に使用されるものや、ＣＴアンギオ装置やＭＲＡ（ＭＲ Ａｎｇｉｏ）装置などで被験者の透視画像である血管画像を撮像する場合に使用されるものである。
次ぎに、吐出口５００に接続されるチューブ（図示せず）に混入している気泡を取り除くべく、外筒用ピストン７００を押して、外筒２００に収容されている生理食塩水を吐出口５００から吐出する。
次ぎに、内筒用ピストン８００を押して、内筒３００に収容されている造影剤を吐出口５００から吐出する。この際、内筒用ピストン８００を引いても、弁６００が設けられているため、薬液がシリンジ１００に逆流することはない。
次ぎに、本発明の実施の形態に係るシリンジを用いて薬液を注入する方法の他の一例について説明する。
まず、内筒３００に造影剤を収容する。
次ぎに、外筒用ピストン７００を引いて、外筒２００に薬液を吸引する。この際、弁６００が設けられているため、薬液が内筒３００に逆流することはない。
次ぎに、内筒用ピストン８００を押して、内筒３００に収容されている造影剤を吐出口５００から注入する。Hereinafter, an example of a method for injecting a chemical solution using the syringe according to the embodiment of the present invention will be described.
First, physiological saline is accommodated in the outer cylinder 200, and a contrast agent is accommodated in the inner cylinder 300. Here, the contrast agent is a CT (Computed Tomography) scanner, an MRI (Magnetic Resonance Imaging) apparatus, a PET (Positron Emission Tomography) apparatus, or the like used when imaging a tomographic image that is a fluoroscopic image of a subject. It is used when a blood vessel image, which is a fluoroscopic image of a subject, is picked up by a CT angio device or an MRA (MR Angio) device.
Next, in order to remove bubbles mixed in a tube (not shown) connected to the discharge port 500, the outer cylinder piston 700 is pushed, and the physiological saline contained in the outer tube 200 is discharged from the discharge port 500. Discharge.
Next, the inner cylinder piston 800 is pushed, and the contrast agent accommodated in the inner cylinder 300 is discharged from the discharge port 500. At this time, even if the inner cylinder piston 800 is pulled, the valve 600 is provided, so that the chemical solution does not flow back into the syringe 100.
Next, another example of a method for injecting a chemical solution using the syringe according to the embodiment of the present invention will be described.
First, the contrast medium is accommodated in the inner cylinder 300.
Next, the outer cylinder piston 700 is pulled to suck the chemical into the outer cylinder 200. At this time, since the valve 600 is provided, the chemical liquid does not flow back into the inner cylinder 300.
Next, the inner cylinder piston 800 is pushed to inject the contrast agent contained in the inner cylinder 300 from the discharge port 500.

以上説明した本発明の実施の形態に係るシリンジ１００によれば、従来の注射器よりも簡単な構成で、複数の薬液を簡単に注入又は吸引することが可能である。また、以上説明した本発明の実施の形態に係るシリンジ１００によれば、２つのシリンジを取り替えることなく、２種類の薬液を注入できる。また、薬液の注入・吸引の必要がある場合でも、２つのシリンジを取り替える必要がない。したがって、本発明の実施の形態に係るシリンジ１００によれば、薬液の注入・吸引についての処理に要する時間や手間を削減できるとともに、処理ミスによる医療過誤を防止することが可能となる。   According to the syringe 100 according to the embodiment of the present invention described above, it is possible to easily inject or suck a plurality of chemical solutions with a simpler configuration than a conventional syringe. Moreover, according to the syringe 100 which concerns on embodiment of this invention demonstrated above, two types of chemical | medical solutions can be inject | poured, without replacing two syringes. Further, even when it is necessary to inject / suck the chemical solution, it is not necessary to replace the two syringes. Therefore, according to the syringe 100 according to the embodiment of the present invention, it is possible to reduce the time and labor required for the process of injecting and aspirating the chemical solution, and to prevent a medical error due to a processing error.

以上の説明は、実施の形態に関するものであるから、本発明は、上記の説明によって何ら限定されない。たとえば、上記の説明では、シリンジ１００が外筒２００と内筒３００という２つの筒を有することとしたが、本発明に係るシリンジは、３つ以上の筒を有することも可能である。また、外筒用ピストン７００及び内筒用ピストン８００は、それぞれ外筒２００及び内筒３００に充填された薬液を吐出口に向けて押せれば足りるが、「押す」に加えて「引く」ことも可能である。上記実施の形態に係るシリンジ１００は、外筒用ピストン２００及び内筒用ピストン３００を「押す」及び「引く」ことが可能な場合、薬液を注入可能なシリンジであるばかりでなく、薬液を含む液体を吸引可能なシリンジともなる。
Since the above description relates to the embodiment, the present invention is not limited by the above description. For example, in the above description, the syringe 100 has two cylinders, the outer cylinder 200 and the inner cylinder 300, but the syringe according to the present invention may have three or more cylinders. In addition, the outer cylinder piston 700 and the inner cylinder piston 800 need only be able to push the chemical solution filled in the outer cylinder 200 and the inner cylinder 300 toward the discharge port, respectively, but in addition to “push”, “pull”. Is also possible. When the outer cylinder piston 200 and the inner cylinder piston 300 can be “pushed” and “pulled”, the syringe 100 according to the above embodiment is not only a syringe capable of injecting a chemical solution but also includes a chemical solution. It also serves as a syringe capable of sucking liquid.

Claims (7)

吐出口を具備する外筒と、
前記外筒の内部に設けられる１つ以上の内筒と、
前記外筒に充填された薬液を前記吐出口に向けて押す外筒用ピストンと、
前記内筒に充填された薬液を前記吐出口に向けて押す内筒用ピストンと、
を備えたことを特徴とするシリンジ。An outer cylinder having a discharge port;
One or more inner cylinders provided inside the outer cylinder;
An outer cylinder piston that pushes the liquid medicine filled in the outer cylinder toward the discharge port;
A piston for an inner cylinder that pushes the chemical filled in the inner cylinder toward the discharge port;
A syringe comprising: 前記外筒と前記内筒とが同心円状に設けられていることを特徴とする請求項１に記載のシリンジ。   The syringe according to claim 1, wherein the outer cylinder and the inner cylinder are provided concentrically. 前記内筒を支持する支持部材が前記吐出口側に設けられていることを特徴とする請求項１又は請求項２に記載のシリンジ。   The syringe according to claim 1 or 2, wherein a support member that supports the inner cylinder is provided on the discharge port side. 前記吐出口から前記内筒に対する薬液の逆流を防止する弁を備えたことを特徴とする請求項１〜請求項３のいずれか１項に記載のシリンジ。   The syringe according to any one of claims 1 to 3, further comprising a valve that prevents a back flow of the chemical liquid from the discharge port to the inner cylinder. 前記外筒用ピストン及び前記内筒用ピストンの少なくとも一方の前記吐出側の形状が、山形状であることを特徴とする請求項１〜請求項４のいずれか１項に記載のシリンジ。   The syringe according to any one of claims 1 to 4, wherein a shape of the discharge side of at least one of the outer cylinder piston and the inner cylinder piston is a mountain shape. 前記外筒用ピストン及び前記内筒用ピストンの少なくとも一方の前記吐出側と反対側に、前記外筒用ピストン、前記内筒用ピストンを押す押部材の先端とロック可能なロック部が設けられている、ことを特徴とする請求項１〜請求項５のいずれか１項に記載のシリンジ。   At least one of the outer cylinder piston and the inner cylinder piston opposite to the discharge side is provided with a lock portion that can lock the distal end of the outer cylinder piston and the pressing member that presses the inner cylinder piston. The syringe according to any one of claims 1 to 5, wherein the syringe is characterized. 請求項１〜請求項６のいずれか１項に記載のシリンジが取り付けられていることを特徴とする薬液注入装置。   A medical fluid injection device to which the syringe according to any one of claims 1 to 6 is attached.
JP2008514373A 2006-04-19 2007-04-11 Syringe, chemical injection device Pending JPWO2007129445A1 (en)

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JP2006116014 2006-04-19
PCT/JP2007/000390 WO2007129445A1 (en) 2006-04-19 2007-04-11 Syringe and medicinal liquid infusion apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014525295A (en) * 2011-09-02 2014-09-29 ユニトラクト シリンジ プロプライエタリイ リミテッド Automatic reconfiguration for dual chamber syringes
JP2014525802A (en) * 2011-07-29 2014-10-02 バイオメット・バイオロジックス・リミテッド・ライアビリティ・カンパニー Spray tip that blends multiple fluids for a coaxial syringe

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DE69330373T2 (en) * 1992-12-01 2002-05-02 Tetsuro Higashikawa SYRINGE
US5535746A (en) * 1994-03-29 1996-07-16 Sterling Winthrop Inc. Prefilled syringe for use with power injector
EP0951306B1 (en) * 1996-11-12 2005-07-20 Medrad Inc. Prefillable syringes and injectors for use therewith
JP2000140102A (en) * 1998-11-13 2000-05-23 Eiken Chem Co Ltd Two-reservoir type syringe, method for preventing oxidation of medicinal liquid and method for administering medicinal liquid using the same
JP4064276B2 (en) * 2003-03-26 2008-03-19 スーガン株式会社 Connected structure
JP4902096B2 (en) * 2003-07-10 2012-03-21 株式会社根本杏林堂 Chemical syringe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014525802A (en) * 2011-07-29 2014-10-02 バイオメット・バイオロジックス・リミテッド・ライアビリティ・カンパニー Spray tip that blends multiple fluids for a coaxial syringe
JP2014525295A (en) * 2011-09-02 2014-09-29 ユニトラクト シリンジ プロプライエタリイ リミテッド Automatic reconfiguration for dual chamber syringes

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