JP2006020803A - Cannula - Google Patents

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JP2006020803A
JP2006020803A JP2004201084A JP2004201084A JP2006020803A JP 2006020803 A JP2006020803 A JP 2006020803A JP 2004201084 A JP2004201084 A JP 2004201084A JP 2004201084 A JP2004201084 A JP 2004201084A JP 2006020803 A JP2006020803 A JP 2006020803A
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cannula
cylindrical
opening
movable
puncture
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JP4414296B2 (en
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Hitoshi Mabuchi
仁志 馬渕
Michiyo Matsunaga
倫世 松永
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Nippon Covidien Ltd
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Nippon Covidien Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cannula, excellent in safety, capable of efficiently sucking medical solutions, etc. stored in various containers. <P>SOLUTION: The cannula 20 consists of a cannula body 21 comprising a tubular puncture part 24 with an opening 25 and a liquid channel 21a formed in the interior, and a movable cannula body 22 formed with a liquid channel 22a communicating with the liquid channel 21a in the interior and a distal end opening 28 formed at the distal end. The movable cannula part 22 is movable between a position where the distal end opening 28 is retreated to the proximal end side of the tubular puncture part 24 from the opening 25 and a position where the distal end opening 28 is advanced forward from the distal end of the tubular puncture part 24. The movable cannula part 22 is provided with an engagement projection 27 and the tubular puncture part 24 is provided with engagement grooves 26a and 26b, respectively, so that the movable cannula part 22 can be immobilized at a position on the proximal end side and at a position on the distal end side of the tubular puncture part 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、アンプル等の容器に収容された薬液等を吸引したり、吸引した薬液等を輸液ラインを介して患者に供給したりする際に用いられるカニューレに関する。   The present invention relates to a cannula that is used when a drug solution or the like stored in a container such as an ampoule is sucked or a sucked drug solution or the like is supplied to a patient via an infusion line.

従来から、バイアルやアンプル等の容器に収容された生理食塩水や薬液等を、先端にカニューレが取り付けられた注射器で吸引し、この薬液等を、患者の体に接続された輸液ラインの所定部分に注入することにより患者の体内に供給することが行われている。このカニューレの先端部は細い筒状の針で構成され、その筒状の針の先端に、薬液等を注入・注出するための開口部が形成されている。このようなカニューレを金属で構成し、その先端部の針先を尖鋭に形成すると、不注意によって医療従事者や患者にカニューレの針先が刺さる等の事故が生じる虞がある。このため、安全性を考慮して、カニューレを樹脂材料で構成するとともに、その先端部の針先を、バイアルの蓋等を構成するゴムを刺すことができる程度の鋭利さを備えた形状にしたものがある(例えば、特許文献1参照)。
特開2002―17853号公報
Conventionally, a physiological saline or medicinal solution contained in a container such as a vial or ampoule is sucked with a syringe with a cannula attached to the tip, and this medicinal solution or the like is a predetermined part of an infusion line connected to the patient's body. Injecting into the body of a patient is performed. The distal end portion of the cannula is constituted by a thin cylindrical needle, and an opening portion for injecting and dispensing a drug solution or the like is formed at the distal end of the cylindrical needle. If such a cannula is made of metal and the tip of the tip of the cannula is sharply formed, there is a risk of accidents such as inadvertent sticking of the tip of the cannula to a medical worker or patient. For this reason, in consideration of safety, the cannula is made of a resin material, and the tip of the cannula is shaped to have a sharpness that can be stabbed with rubber constituting the lid of the vial or the like. There are some (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2002-17853

しかしながら、前述した従来の樹脂製のカニューレは、金属製のカニューレに比べて強度や剛性が劣るため、バイアルのゴム蓋等を貫通させるためには金属製のカニューレよりも太く、かつ短くする必要が生じる。このため、アンプルのようにゴム蓋が無く、針先を底部まで挿し込まなければ内部の薬液を全部吸い取ることができない容器での使用には不向きであるという問題がある。
本発明は、このような事情に鑑みなされたもので、その目的は、種々の容器に収容された薬液等を効率よく吸引でき、かつ安全性に優れたカニューレを提供することである。
However, since the conventional resin cannula described above is inferior in strength and rigidity compared to a metal cannula, it is necessary to make it thicker and shorter than a metal cannula in order to penetrate the rubber lid of the vial. Arise. For this reason, there is no rubber lid like an ampoule, and there is a problem that it is unsuitable for use in a container that cannot absorb all of the chemical inside unless the needle tip is inserted to the bottom.
This invention is made | formed in view of such a situation, The objective is to provide the cannula which can aspirate the chemical | medical solution etc. which were accommodated in the various container efficiently, and was excellent in safety | security.

前述した目的を達成するため、本発明に係るカニューレの構成上の特徴は、先端側部分に開口部が形成された筒状穿刺部を含み、内部に開口部に連通する液体流路が形成されたカニューレ本体と、先端側部分に先端開口部が形成され内部に先端開口部に連通する連通液体流路が形成された筒状の可動カニューレ部とを備えたカニューレであって、先端開口部を開口部と同じ位置または開口部よりも筒状穿刺部の基端部側に後退させた位置と、先端開口部を筒状穿刺部の先端部よりも前方に進出させた位置との間で移動可能な状態で、可動カニューレ部をカニューレ本体に取り付け、可動カニューレが前方に進出したときに、連通液体流路が液体流路に連通して前方に伸びるようにしたことにある。   In order to achieve the above-described object, a structural feature of the cannula according to the present invention includes a cylindrical puncture portion having an opening formed at the distal end side portion, and a liquid channel communicating with the opening is formed therein. A cannula main body and a cylindrical movable cannula part having a tip opening formed in the tip side portion and a communication liquid channel communicating with the tip opening inside. Move between the same position as the opening or a position where the proximal end of the tubular puncture part is retracted from the opening and a position where the distal opening is advanced forward from the distal end of the tubular puncture part In a possible state, the movable cannula portion is attached to the cannula body, and when the movable cannula advances forward, the communication liquid channel communicates with the liquid channel and extends forward.

前述のように構成した本発明のカニューレは、筒状穿刺部を含むカニューレ本体と、筒状穿刺部に対してスライド移動可能に取り付けられた可動カニューレ部とで構成されている。したがって、薬液等が収容された容器に応じて可動カニューレ部をカニューレ本体の筒状穿刺部から進退させることにより、どのような容器に収容された薬液等でも吸引することができる。例えば、アンプル等の容器に収容された薬液等を吸引する際には、筒状穿刺部から可動カニューレ部を突出させることにより、容器内の薬液等を残らず吸引することができる。すなわち、このカニューレは、アンプルのようにゴム蓋等を備えていない長い容器から薬液等を吸引する場合には、可動カニューレ部を筒状穿刺部から突出させて筒状穿刺部と可動カニューレ部との合計長さを長くした状態で、可動カニューレ部の先端開口部から薬液等を吸引する。   The cannula of the present invention configured as described above includes a cannula body including a cylindrical puncture portion, and a movable cannula portion that is slidably attached to the cylindrical puncture portion. Accordingly, by moving the movable cannula part back and forth from the cylindrical puncture part of the cannula body according to the container in which the chemical solution or the like is stored, the chemical solution or the like stored in any container can be aspirated. For example, when a drug solution or the like stored in a container such as an ampoule is sucked, the drug solution or the like in the container can be sucked without leaving the movable cannula part by projecting from the cylindrical puncture part. That is, this cannula is designed to project the movable cannula part from the cylindrical puncture part and to move the cylindrical puncture part and the movable cannula part when a chemical solution or the like is sucked from a long container not provided with a rubber lid or the like like an ampoule. In a state where the total length is increased, a drug solution or the like is sucked from the distal end opening of the movable cannula.

また、バイアルのようにゴム蓋を備えた容器に収容された薬液等を吸引する場合や、ゴム部を備えた医療用活栓を介して患者の体内に薬液等を供給する場合には、可動カニューレ部を筒状穿刺部の基端部側に後退させて筒状穿刺部を先端側に位置させた状態で、筒状穿刺部の針先を直接、バイアルのゴム蓋や医療用活栓のゴム部に差し込み、薬液等を吸引したり供給したりする。   When a drug solution or the like contained in a container having a rubber lid such as a vial is sucked, or when a drug solution or the like is supplied to the patient's body through a medical stopcock having a rubber part, a movable cannula The needle tip of the cylindrical puncture part is directly attached to the rubber lid of the vial or the medical stopcock rubber part with the part retracted toward the proximal end side of the cylindrical puncture part and the cylindrical puncture part positioned on the distal end side. Insert into and suck in or supply chemicals.

ゴム蓋等を備えた容器の場合、上下方向に反転させても内部の薬液等が漏れることがないため、筒状穿刺部を刺した状態で容器を逆さまにすることによって筒状穿刺部の先端部を容器の底部に到達させることなく薬液等の吸引が可能になる。これによって、種々の容器に収容された略すべての薬液等を容器内に残すことなく適正な状態で患者に供給することができる。また、カニューレ本体と可動カニューレ部とが、一体的に組み付けられているため取り扱いやすくなる。なお、開口部が形成されるカニューレ本体の先端側部分は、先端部と、先端部の近傍部分の双方を含むものとする。   In the case of a container equipped with a rubber lid etc., even if it is inverted in the vertical direction, the internal chemicals do not leak, so the tip of the cylindrical puncture part can be obtained by turning the container upside down with the cylindrical puncture part stabbed A chemical solution or the like can be sucked without causing the portion to reach the bottom of the container. As a result, almost all of the drug solution and the like stored in various containers can be supplied to the patient in an appropriate state without leaving them in the container. Moreover, since the cannula body and the movable cannula part are assembled together, it becomes easy to handle. In addition, the front end side part of the cannula main body in which an opening part is formed shall include both a front-end | tip part and the vicinity part of a front-end | tip part.

また、本発明に係るカニューレの他の構成上の特徴は、可動カニューレ部を筒状穿刺部の基端部側に後退させた位置と、可動カニューレ部を筒状穿刺部の先端部側に進出させた位置とに、それぞれ可動カニューレ部を筒状穿刺部に対して静止させるための係合部を設けたことにある。これによると、可動カニューレ部を使用に応じた適正位置に確実に静止させることができるため、カニューレの操作が容易になる。この場合の係合部としては、溝部と突部などの互いに着脱可能に係合できる構造や、摩擦抵抗を利用したもの等を使用することができる。   In addition, other structural features of the cannula according to the present invention include a position where the movable cannula portion is retracted toward the proximal end side of the cylindrical puncture portion, and the movable cannula portion is advanced toward the distal end side of the cylindrical puncture portion. In other words, the movable cannula part is provided with an engaging part for making the movable cannula part stationary with respect to the cylindrical puncture part. According to this, since the movable cannula part can be surely stopped at an appropriate position according to use, the operation of the cannula becomes easy. As the engaging portion in this case, a structure that can be detachably engaged with each other, such as a groove portion and a protruding portion, a member that uses frictional resistance, or the like can be used.

また、本発明に係るカニューレのさらに他の構成上の特徴は、筒状穿刺部の先端部を閉塞して筒状穿刺部の先端側部分の側部に開口部を形成するとともに、可動カニューレ部を筒状穿刺部の外周面側に取り付け、可動カニューレ部が筒状穿刺部の基端部側に後退したときに筒状穿刺部の先端側部分が露呈し、可動カニューレ部が筒状穿刺部の先端部側に進出したときに筒状穿刺部の先端部が可動カニューレ部によって覆われるようにしたことにある。   Still another structural feature of the cannula according to the present invention is that the distal end portion of the cylindrical puncture portion is closed to form an opening in the side portion of the distal end side portion of the tubular puncture portion, and the movable cannula portion Is attached to the outer peripheral surface side of the cylindrical puncture portion, and the distal end portion of the cylindrical puncture portion is exposed when the movable cannula portion is retracted to the proximal end side of the cylindrical puncture portion, and the movable cannula portion is the cylindrical puncture portion The distal end portion of the cylindrical puncture portion is covered with the movable cannula portion when the distal end portion of the tube is advanced.

このように構成したカニューレでは、筒状穿刺部の先端部を閉塞して、筒状穿刺部の先端側部分の側部に注入・注出用の開口部を形成している。このため、筒状穿刺部をバイアルのゴム蓋や医療用活栓のゴム部に刺しても、その先端部は、開口部の縁部をゴム蓋等に強く押し付けることなく、ゴム蓋等の内部を通過するだけであるため、開口部の縁部がゴム蓋等を削り取って破損させることはない。このため、ゴム蓋等の破片が薬液等とともにカニューレ本体の内部に入り込むといったことを防止できる。   In the cannula thus configured, the distal end portion of the cylindrical puncture portion is closed, and an opening for injection and extraction is formed on the side portion of the distal end portion of the cylindrical puncture portion. For this reason, even if the cylindrical puncture part is inserted into the rubber lid of the vial or the rubber part of the medical stopcock, the tip of the tip does not press the edge of the opening strongly against the rubber lid etc. Since it only passes, the edge of the opening does not scrape the rubber lid or the like and cause damage. For this reason, it can prevent that fragments, such as a rubber lid, enter the inside of a cannula main body with a chemical | medical solution etc.

また、本発明に係るカニューレのさらに他の構成上の特徴は、可動カニューレ部が筒状穿刺部の基端部側に後退したときに筒状穿刺部の開口部に対応する可動カニューレ部の側部に、開口部と連通し、先端開口部の一部を構成する側部開口部を形成したことにある。   Still another structural feature of the cannula according to the present invention is that the side of the movable cannula corresponding to the opening of the cylindrical puncture when the movable cannula is retracted toward the proximal end of the cylindrical puncture. That is, a side opening that forms a part of the tip opening and communicates with the opening.

これによると、可動カニューレ部が筒状穿刺部の基端部側に後退したときに、可動カニューレ部の先端部が筒状穿刺部の開口部に位置していても、筒状穿刺部の開口部と可動カニューレ部の側部開口部とが連通するため薬液等の注入・注出がスムーズに行える。この結果、可動カニューレ部の取り付け位置や形状の設定に自由度が増すようになり、特に長さを自由に設定することが可能になる。なお、この側部開口部は、先端開口部の一部を構成するもので、可動カニューレ部の先端面に開口部を形成し、この開口部と連続して形成してもよいし、離れた位置に形成してもよい。また、この側部開口部だけで先端開口部を構成してもよい。   According to this, even when the distal end portion of the movable cannula portion is positioned at the opening portion of the cylindrical puncture portion when the movable cannula portion is retracted toward the proximal end portion side of the cylindrical puncture portion, the opening of the cylindrical puncture portion is Since the portion and the side opening of the movable cannula communicate with each other, injection and extraction of a chemical solution and the like can be performed smoothly. As a result, the degree of freedom increases in setting the mounting position and shape of the movable cannula part, and in particular, the length can be freely set. In addition, this side part opening part comprises a part of front-end | tip opening part, forms an opening part in the front end surface of a movable cannula part, and may form continuously with this opening part, and it separated You may form in a position. Moreover, you may comprise a front-end | tip opening part only by this side part opening part.

また、本発明に係るカニューレのさらに他の構成上の特徴は、筒状穿刺部の先端部に開口部を形成するとともに、可動カニューレ部を筒状穿刺部の内周面側に取り付け、可動カニューレ部が筒状穿刺部の基端部側に後退したときに可動カニューレ部の先端部は筒状穿刺部内に入り込み、可動カニューレ部が筒状穿刺部の先端部側に進出したときに可動カニューレ部の先端部は筒状穿刺部の先端部から突出するようにしたことにある。これによっても、種々の容器に収容された薬液等を効率よく吸引することができる。また、可動カニューレ部が筒状穿刺部の内部側に位置するため、カニューレを取り扱う際に、邪魔にならなくなる。   Still another structural feature of the cannula according to the present invention is that an opening is formed at the tip of the cylindrical puncture portion, and the movable cannula portion is attached to the inner peripheral surface side of the cylindrical puncture portion. The movable cannula part enters the cylindrical puncture part when the part moves backward to the proximal end side of the cylindrical puncture part, and the movable cannula part moves when the movable cannula part advances to the distal end side of the cylindrical puncture part This is because the distal end portion of the tube protrudes from the distal end portion of the cylindrical puncture portion. Also by this, the chemical | medical solution etc. which were accommodated in the various containers can be aspirated efficiently. Moreover, since the movable cannula part is located on the inner side of the cylindrical puncture part, it does not get in the way when handling the cannula.

また、本発明にかかるカニューレのさらに他の構成上の特徴は、先端部に先端開口部が形成された筒状部を含み、内部に先端開口部に連通する液体流路が形成されたカニューレ本体と、先端側部分に開口部が形成された穿刺部を含み、内部に開口部およびカニューレ本体の液体流路と連通する連通液体流路が形成された可動カニューレ部とを備えたカニューレであって、可動カニューレ部を筒状部の内周面側に取り付け、可動カニューレ部が穿刺部を筒状部の先端部から突出させた状態で、筒状部に対して進退できるようにしたことにある。これによると、穿刺部をバイアルのゴム蓋や医療用活栓のゴム部等に刺す必要があるとともに、筒状部と可動カニューレ部との合計長さを長くする必要がある場合に好適な使用が可能になる。   Still another structural feature of the cannula according to the present invention is that the cannula body includes a cylindrical portion having a tip opening formed at the tip, and a liquid flow channel communicating with the tip opening is formed therein. And a movable cannula part including a puncture part having an opening formed at the distal end side portion and having a communication liquid channel communicating with the liquid channel of the opening and the cannula body inside. The movable cannula part is attached to the inner peripheral surface side of the cylindrical part, and the movable cannula part can move forward and backward with respect to the cylindrical part with the puncture part protruding from the tip part of the cylindrical part. . According to this, it is necessary to pierce the puncture part into the rubber lid of the vial, the rubber part of the medical stopcock, etc., and it is suitable for use when it is necessary to increase the total length of the cylindrical part and the movable cannula part. It becomes possible.

また、本発明にかかるカニューレは、樹脂材料で構成することが好ましい。これによると針先を鈍針状に形成して安全性を高めることができるとともに、形状の設計に自由度が増すようになり、複雑な形状のカニューレを成形することができる。   The cannula according to the present invention is preferably made of a resin material. According to this, the needle tip can be formed in a blunt needle shape to increase safety, and the degree of freedom in designing the shape can be increased, so that a cannula having a complicated shape can be formed.

(第1実施形態)
以下、本発明の第1実施形態に係るカニューレを図面を用いて説明する。図1は、同実施形態に係るカニューレ20が取り付けられた注射器10を示している。この注射器10は、生理食塩水や薬液等を収容するためのシリンダー部11と、シリンダー部11内に薬液等を吸引するためのピストン部12とを備えている。シリンダー部11は、表面に目盛りが施された円筒体からなるシリンダー本体13と、シリンダー本体13の先端(図1における右側部分)に形成された細径円筒状の被取付け部14と、シリンダー本体13の後端部の外周に形成されたフランジ状の指当て部15とで構成されている。
(First embodiment)
Hereinafter, a cannula according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a syringe 10 to which a cannula 20 according to the embodiment is attached. The syringe 10 includes a cylinder portion 11 for storing physiological saline, a chemical solution, and the like, and a piston portion 12 for sucking the chemical solution and the like into the cylinder portion 11. The cylinder part 11 includes a cylinder main body 13 formed of a cylindrical body with a scale on the surface, a thin cylindrical attached portion 14 formed at the tip of the cylinder main body 13 (the right side portion in FIG. 1), and a cylinder main body. 13 and a flange-like finger rest 15 formed on the outer periphery of the rear end portion.

ピストン部12は、先端に形成されたゴム部(図示せず)をシリンダー本体13の内周面に液密的に接触させた状態でシリンダー部11内に移動可能に取り付けられた円柱状部16と、円柱状部16の後端部に形成された円板状の操作部17とで構成されている。そして、シリンダー部11の被取付け部14にカニューレ20が着脱可能な状態で取り付けられている。   The piston portion 12 is a columnar portion 16 movably attached to the cylinder portion 11 in a state where a rubber portion (not shown) formed at the tip is in liquid-tight contact with the inner peripheral surface of the cylinder body 13. And a disk-shaped operation portion 17 formed at the rear end portion of the columnar portion 16. And the cannula 20 is attached to the to-be-attached part 14 of the cylinder part 11 in the state which can be attached or detached.

カニューレ20は、図2ないし図4に示したように、カニューレ本体21とカニューレ本体21にスライド可能な状態で取り付けられた可動カニューレ部22とで構成されている。カニューレ本体21は、段違いの略円筒体で構成され、内部には本発明の液体流路としての液体流路21aがカニューレ本体21の中心軸に沿って形成されている。また、カニューレ本体21は、注射器10の被取付け部14の外周面に液密的に取り付けられる円筒状の取付け部23を備えており、その先端側に、小径の筒状穿刺部24が形成されている。   As shown in FIGS. 2 to 4, the cannula 20 includes a cannula body 21 and a movable cannula part 22 that is slidably attached to the cannula body 21. The cannula body 21 is formed of a substantially cylindrical body having a different level, and a liquid channel 21 a as a liquid channel of the present invention is formed along the central axis of the cannula body 21. Further, the cannula body 21 includes a cylindrical attachment portion 23 that is liquid-tightly attached to the outer peripheral surface of the attachment portion 14 of the syringe 10, and a small-diameter cylindrical puncture portion 24 is formed on the distal end side thereof. ing.

筒状穿刺部24は、基端部24aから先端部側に向けてやや先細りになった円筒状に形成され、その先端部に鈍針24bが形成されている。そして、液体流路21aにおける鈍針24bの内部に形成された部分は、一定の内径に設定されているが、鈍針24bの外周部は、後部(基端部24a側部分)から先端側に向って徐々に大径になるテーパ状に形成されている。また、鈍針24bの先端部は、先端側が徐々に細くなった2段状の傾斜部(後部側が円錐台形で、先端側が円錐形)で構成されて、前端面は閉塞されている。   The cylindrical puncture portion 24 is formed in a cylindrical shape that is slightly tapered from the proximal end portion 24a toward the distal end portion, and a blunt needle 24b is formed at the distal end portion. And the part formed in the inside of the blunt needle 24b in the liquid flow path 21a is set to the fixed internal diameter, but the outer peripheral part of the blunt needle 24b is the front end side from the rear part (base end part 24a side part). It is formed in a tapered shape with a gradually increasing diameter. Further, the blunt needle 24b has a tip end portion formed of a two-step inclined portion (the rear side is a truncated cone shape and the tip side is conical) whose tip side is gradually narrowed, and the front end surface is closed.

そして、鈍針24bの先端側部分の両側部に、液体流路21aに通じる開口部25が対向して形成されている。また、筒状穿刺部24の基端部24a側部分の外周面には、係合溝部26aが円周に沿って設けられ、鈍針24bの外周面における開口部25の後端部よりもやや後部に係合溝部26bが円周に沿って設けられている。係合溝部26aの深さは係合溝部26bの深さよりも大きく設定されているが、係合溝部26a,26bのそれぞれの溝底部から筒状穿刺部24の中心軸Lまでの長さは同じ長さに設定されている。また、液体流路21aにおける鈍針24bよりも筒状穿刺部24の基端側に位置する部分は、筒状穿刺部24のテーパに沿うように基端部24aから先端部側に向けて先細りに形成されている。   And the opening part 25 which leads to the liquid flow path 21a is formed in the both sides of the front end side part of the blunt needle 24b facing. Further, an engagement groove 26a is provided along the circumference on the outer peripheral surface of the proximal end portion 24a side portion of the cylindrical puncture portion 24, and is slightly more than the rear end portion of the opening 25 on the outer peripheral surface of the blunt needle 24b. An engagement groove 26b is provided at the rear part along the circumference. The depth of the engaging groove portion 26a is set to be larger than the depth of the engaging groove portion 26b, but the length from the bottom of each of the engaging groove portions 26a and 26b to the central axis L of the cylindrical puncture portion 24 is the same. It is set to length. Further, a portion of the liquid flow channel 21a that is located closer to the proximal end of the cylindrical puncture portion 24 than the blunt needle 24b tapers from the proximal end portion 24a toward the distal end portion along the taper of the cylindrical puncture portion 24. Is formed.

また、可動カニューレ部22は、円筒体で構成され、内部には液体流路21aに連通可能な本発明の連通液体流路としての液体流路22aが可動カニューレ部22の中心軸に沿って形成されている。この液体流路22aを形成する可動カニューレ部22の内周面は、可動カニューレ部22が筒状穿刺部24の基端部24a側に位置したときに、筒状穿刺部24の外周面と密着するように、先端部側の内径が小さく、後端部側に行くほど徐々に内径が大きくなるテーパ状に形成されている。そして、可動カニューレ部22の内周面における後部側部分に、係合溝部26a,26bと係合可能な係合突部27が円周に沿って設けられている。また、可動カニューレ部22の先端面には、先端側が先細りになった突起部22bが形成されており、この突起部22bの中央に液体流路22aに通じる先端開口部28が形成されている。   Moreover, the movable cannula part 22 is comprised by the cylindrical body, and the liquid flow path 22a as a communicating liquid flow path of this invention which can communicate with the liquid flow path 21a is formed in the inside along the central axis of the movable cannula part 22. Has been. The inner peripheral surface of the movable cannula part 22 forming the liquid channel 22a is in close contact with the outer peripheral surface of the cylindrical puncture part 24 when the movable cannula part 22 is positioned on the proximal end part 24a side of the cylindrical puncture part 24. Thus, the inner diameter on the front end side is small, and the inner diameter gradually increases toward the rear end side. An engagement protrusion 27 that can engage with the engagement groove portions 26 a and 26 b is provided along the circumference on the rear side portion of the inner peripheral surface of the movable cannula portion 22. Further, a protruding portion 22b having a tapered tip is formed on the distal end surface of the movable cannula portion 22, and a distal end opening 28 communicating with the liquid flow path 22a is formed at the center of the protruding portion 22b.

図3および図4のように、可動カニューレ部22が筒状穿刺部24の基端部24a側に後退して、係合溝部26aと係合突部27とが係合したときには、可動カニューレ部22は内周面を筒状穿刺部24の外周面に密着させて静止状態を維持する。また、図2のように、可動カニューレ部22が筒状穿刺部24の先端部側に突出したときには、係合溝部26bと係合突部27とが係合し、その係合によって、可動カニューレ部22の内周面と筒状穿刺部24の外周面との間が密閉された状態で可動カニューレ部22は静止状態を維持する。この可動カニューレ部22は、カニューレ本体21と同軸的に取り付けられており、その中心軸も中心軸Lとなる。また、これらのカニューレ本体21および可動カニューレ部22は、ともに熱可塑性樹脂材料を成形した成形品で構成されている。   As shown in FIGS. 3 and 4, when the movable cannula portion 22 is retracted toward the proximal end portion 24a side of the cylindrical puncture portion 24 and the engagement groove portion 26a and the engagement protrusion 27 are engaged, the movable cannula portion 22 keeps the inner peripheral surface in close contact with the outer peripheral surface of the cylindrical puncture portion 24 to maintain a stationary state. In addition, as shown in FIG. 2, when the movable cannula portion 22 protrudes toward the distal end side of the cylindrical puncture portion 24, the engagement groove portion 26b and the engagement projection portion 27 engage with each other, and the engagement makes the movable cannula. The movable cannula part 22 maintains a stationary state in a state where the space between the inner peripheral surface of the part 22 and the outer peripheral surface of the cylindrical puncture part 24 is sealed. The movable cannula part 22 is coaxially attached to the cannula body 21, and the central axis thereof is also the central axis L. Further, both the cannula body 21 and the movable cannula part 22 are formed of a molded product obtained by molding a thermoplastic resin material.

この構成において、図1に示したように、可動カニューレ部22が筒状穿刺部24の先端部からに突出した状態のカニューレ20が取り付けられた注射器10を用いて、例えば、図5に示したアンプル31内の薬液32を吸引する場合について説明する。この場合、まず、アンプル31をくびれ部分に形成された切断部31aに沿って折り曲げて、アンプル本体31bから上部の閉塞蓋部31cを切断して取り除く。つぎに、上端が開口したアンプル本体31bの開口から、アンプル本体31b内に可動カニューレ部22の先端部を挿入し、突起部22bの先端開口部28を薬液32に浸けた状態で、注射器10のピストン部12をシリンダー部11から引き抜きながら上方に移動させる。   In this configuration, as shown in FIG. 1, using the syringe 10 to which the cannula 20 with the movable cannula portion 22 protruding from the distal end portion of the cylindrical puncture portion 24 is attached, for example, as shown in FIG. The case where the chemical | medical solution 32 in the ampoule 31 is attracted | sucked is demonstrated. In this case, first, the ampule 31 is bent along the cutting portion 31a formed in the constricted portion, and the upper closing lid portion 31c is cut and removed from the ampule main body 31b. Next, the tip of the movable cannula part 22 is inserted into the ampoule body 31b from the opening of the ampoule body 31b whose upper end is opened, and the tip opening 28 of the protrusion 22b is immersed in the drug solution 32. The piston portion 12 is moved upward while being pulled out from the cylinder portion 11.

これによって、アンプル本体31b内の薬液32は徐々に、注射器10のシリンダー本体13内に吸引されていく。この際、低下していく薬液32の液面高さに応じて注射器10を移動させて注射器10に取り付けたカニューレ20をアンプル本体31b内の下方側に位置させる。そして、図6に示したように、殆どの薬液32を吸引して、突起部22bの先端部がアンプル本体31bの底部に到達すると、図7のようにアンプル本体31bを傾倒させ、アンプル本体31bの上部側に形成された窪みの部分に残りの薬液32を溜める。   As a result, the drug solution 32 in the ampoule body 31 b is gradually sucked into the cylinder body 13 of the syringe 10. At this time, the syringe 10 is moved according to the liquid level height of the decreasing drug solution 32 and the cannula 20 attached to the syringe 10 is positioned on the lower side in the ampoule body 31b. Then, as shown in FIG. 6, when most of the chemical liquid 32 is sucked and the tip of the protrusion 22b reaches the bottom of the ampoule body 31b, the ampoule body 31b is tilted as shown in FIG. The remaining medicinal solution 32 is stored in a hollow portion formed on the upper side of.

そして、注射器10に取り付けたカニューレ20をアンプル本体31bの開口側に引き出して、突起部22bの先端開口部28を、薬液32の中に浸け、再度、ピストン部12をシリンダー部11から引き抜くように後退させることにより、残りの薬液32をシリンダー本体13内に吸引させる。これによって、アンプル31内の薬液32の殆どを注射器10で吸引することができる。   Then, the cannula 20 attached to the syringe 10 is pulled out to the opening side of the ampoule body 31b, the tip opening 28 of the protrusion 22b is immersed in the chemical solution 32, and the piston 12 is pulled out from the cylinder 11 again. By retracting, the remaining chemical liquid 32 is sucked into the cylinder body 13. As a result, most of the drug solution 32 in the ampoule 31 can be sucked by the syringe 10.

つぎに、注射器10に吸引した薬液32を患者(図示せず)の体内に供給する場合について説明する。図8は、患者の体に接続された輸液ライン33が備える三方活栓34を示しており、この三方活栓34を介して注射器10内の薬液32は患者に供給される。三方活栓34は、可撓性のチューブ33a,33bを直線状に接続する分岐管34a,34bと、分岐管34a,34b間に形成されたチャンバ部35と、チャンバ部35から分岐管34a,34bに対して直交する方向に延びる分岐管34cとを備えている。   Next, a case where the drug solution 32 sucked into the syringe 10 is supplied into the body of a patient (not shown) will be described. FIG. 8 shows a three-way cock 34 provided in an infusion line 33 connected to the patient's body, and the drug solution 32 in the syringe 10 is supplied to the patient via the three-way cock 34. The three-way cock 34 includes branch pipes 34a and 34b for connecting flexible tubes 33a and 33b in a straight line, a chamber part 35 formed between the branch pipes 34a and 34b, and the branch pipes 34a and 34b from the chamber part 35. And a branch pipe 34c extending in a direction orthogonal to.

そして、チャンバ部35内には、弁体36が回転自在に設置されており、この弁体36を操作レバー38の操作によって回転させることにより、分岐管34a,34b,34c間における連通ルートを適宜切り換えることができる。また、分岐管34cの内部には、天然ゴムまたは合成ゴムからなる弾性体(図示せず)が設置されている。この弾性体には、チャンバ部35の内部側と分岐管34cの外部側との間を貫通するスリットが設けられているが、通常時には、弾性体の弾性によってスリットは閉塞された状態になっている。   A valve body 36 is rotatably installed in the chamber portion 35. By rotating the valve body 36 by operating the operation lever 38, a communication route between the branch pipes 34a, 34b, and 34c is appropriately set. Can be switched. An elastic body (not shown) made of natural rubber or synthetic rubber is installed inside the branch pipe 34c. The elastic body is provided with a slit penetrating between the inner side of the chamber portion 35 and the outer side of the branch pipe 34c. Normally, the slit is closed by the elasticity of the elastic body. Yes.

そして、注射器10内に吸引した薬液32を患者に供給する際には、弁体36を回転させて、分岐管34cと、患者側に接続された分岐管、例えば、分岐管34aとを連通させる。そして、可動カニューレ部22を筒状穿刺部24の基端部24a側に後退させ、鈍針24bを分岐管34c内の弾性体のスリットに刺し込む。これによって、鈍針24bの開口部25は、チャンバ部35内に位置し、注射器10内の薬液32を輸液ライン33に供給可能な状態になる。その状態で、注射器10のピストン部12を、シリンダー部11内に押し込むことにより、薬液32は、チャンバ部35から分岐管34aおよびチューブ33a等を介して、患者の体内、例えば血管内に供給される。   And when supplying the chemical | medical solution 32 suck | inhaled in the syringe 10 to a patient, the valve body 36 is rotated and the branch pipe 34c and the branch pipe connected to the patient side, for example, the branch pipe 34a are connected. . Then, the movable cannula part 22 is retracted toward the proximal end part 24a side of the cylindrical puncture part 24, and the blunt needle 24b is inserted into the slit of the elastic body in the branch pipe 34c. As a result, the opening 25 of the blunt needle 24b is positioned in the chamber portion 35, and the medicinal solution 32 in the syringe 10 can be supplied to the infusion line 33. In this state, by pushing the piston portion 12 of the syringe 10 into the cylinder portion 11, the chemical liquid 32 is supplied from the chamber portion 35 into the patient's body, for example, a blood vessel via the branch pipe 34a and the tube 33a. The

この場合、鈍針24bに先端側が大径になったテーパ部が形成されているため、鈍針24bが弾性体の復元力によって後退して弾性体から外れることを防止できる。また、鈍針24bの先端部が2段状の段部に形成されているとともに、開口部25が鈍針24bの側部に形成されているため、鈍針24bを弾性体に刺し込む際、弾性体が、鈍針24bの先端部および開口部25の縁部によって削り取られて破損するといったことは生じない。したがって、削り取られた弾性体の破片が、薬液32とともに患者の体内に送られるといったことも生じず、薬液32は適正な状態を維持したまま患者の体内に供給される。   In this case, since the blunt needle 24b is formed with a tapered portion having a large diameter on the tip side, it is possible to prevent the blunt needle 24b from retreating from the elastic body due to the restoring force of the elastic body. Moreover, since the front-end | tip part of the blunt needle 24b is formed in the step part of two steps, and the opening part 25 is formed in the side part of the blunt needle 24b, when inserting the blunt needle 24b in an elastic body, The elastic body is not scraped off and damaged by the tip of the blunt needle 24b and the edge of the opening 25. Therefore, the scraped pieces of the elastic body are not sent into the patient's body together with the drug solution 32, and the drug solution 32 is supplied to the patient's body while maintaining an appropriate state.

図9は、可動カニューレ部22が筒状穿刺部24の基端部24a側に位置した状態のカニューレ20が取り付けられた注射器10で、バイアル37に収容された薬液32aを吸引している状態を示している。このバイアル37では、蓋37aがゴム製のキャップ部とキャップ部の周囲を固定するアルミニウム製の枠部(図示せず)で構成されている。この場合には、鈍針24bを直接蓋37aの中央部に刺し込んで、開口部25をバイアル37内に位置させる。そして、バイアル37を注射器10とともに、上下に反転させて鈍針24bの先端側部分を薬液32aに浸ける。その状態で、注射器10のピストン部12をシリンダー部11から下方に引いて、シリンダー本体13内に薬液32aを吸引する。   FIG. 9 shows a state in which the medicinal solution 32a accommodated in the vial 37 is sucked by the syringe 10 to which the cannula 20 is attached with the movable cannula portion 22 positioned on the proximal end portion 24a side of the cylindrical puncture portion 24. Show. In this vial 37, the lid 37a is composed of a rubber cap part and an aluminum frame part (not shown) for fixing the periphery of the cap part. In this case, the blunt needle 24 b is directly inserted into the center of the lid 37 a and the opening 25 is positioned in the vial 37. Then, the vial 37 is turned upside down together with the syringe 10, and the tip side portion of the blunt needle 24b is immersed in the drug solution 32a. In this state, the piston portion 12 of the syringe 10 is pulled downward from the cylinder portion 11 to suck the drug solution 32 a into the cylinder body 13.

この場合も、鈍針24bを蓋37aに刺し込む際、開口部25の縁部によって、蓋37aが削り取られることはない。また、バイアル37の上下を反転させて薬液32aを抜き取るため、バイアル37内の薬液32aの殆どを効率よく注射器10内に吸引することができる。注射器10に吸引された薬液32aは、図8に示した輸液ライン33を用い、前述した方法によって、患者の体内に供給される。   Also in this case, when the blunt needle 24b is inserted into the lid 37a, the lid 37a is not scraped off by the edge of the opening 25. Further, since the vial 37 is turned upside down to extract the drug solution 32a, most of the drug solution 32a in the vial 37 can be efficiently sucked into the syringe 10. The drug solution 32a sucked into the syringe 10 is supplied into the patient's body by the method described above using the infusion line 33 shown in FIG.

このように、本実施形態に係るカニューレ20では、可動カニューレ部22がカニューレ本体21の筒状穿刺部24に対してスライド可能に取り付けられているため、可動カニューレ部22を筒状穿刺部24に対して進退させることにより、可動カニューレ部22と筒状穿刺部24との全体長さを変更することができる。また、その際、先端側に鈍針24bの開口部25を位置させたり、可動カニューレ部22の先端開口部28を位置させたりすることができる。このため、アンプル31やバイアル37等どのような形状の容器に収容された薬液32,32a等でも吸引することができる。また、本実施形態に係るカニューレ20では、筒状穿刺部24の外周面に係合溝部26a,26bを設け、可動カニューレ部22の内周面に、係合溝部26a,26bと係合可能な係合突部27を設けている。   As described above, in the cannula 20 according to the present embodiment, the movable cannula part 22 is slidably attached to the cylindrical puncture part 24 of the cannula main body 21, so the movable cannula part 22 is attached to the cylindrical puncture part 24. On the other hand, the total length of the movable cannula part 22 and the cylindrical puncture part 24 can be changed by advancing and retracting. At that time, the opening 25 of the blunt needle 24b can be positioned on the distal end side, and the distal opening 28 of the movable cannula 22 can be positioned. For this reason, the drug solution 32, 32a, etc. accommodated in any shape container such as the ampule 31 and the vial 37 can be sucked. In the cannula 20 according to the present embodiment, the engagement groove portions 26 a and 26 b are provided on the outer peripheral surface of the cylindrical puncture portion 24, and the engagement groove portions 26 a and 26 b can be engaged with the inner peripheral surface of the movable cannula portion 22. An engagement protrusion 27 is provided.

このため、係合溝部26aと係合突部27を係合させることにより、可動カニューレ部22を筒状穿刺部24の基端部24a側に後退させた位置で静止させることができ、係合溝部26bと係合突部27を係合させることにより、可動カニューレ部22を筒状穿刺部24の先端部側に突出させた位置で静止させることができる。また、その際、可動カニューレ部22が、筒状穿刺部24に対して確実に係合するため、注射器10およびカニューレ20の操作が容易になるとともに、可動カニューレ部22と筒状穿刺部24との間を確実に密閉して薬液32,32a等の漏れを防止することができる。   For this reason, by engaging the engagement groove 26a and the engagement protrusion 27, the movable cannula 22 can be stopped at the position retracted toward the proximal end 24a of the cylindrical puncture 24, and the engagement By engaging the groove 26 b and the engaging protrusion 27, the movable cannula 22 can be stopped at a position where it protrudes toward the distal end side of the cylindrical puncture portion 24. At this time, since the movable cannula portion 22 is securely engaged with the cylindrical puncture portion 24, the operation of the syringe 10 and the cannula 20 is facilitated, and the movable cannula portion 22, the cylindrical puncture portion 24, It is possible to prevent the chemical liquids 32 and 32a from leaking.

さらに、本実施形態に係るカニューレ20では、鈍針24bの先端側部分の側部に開口部25を形成しているため、鈍針24bを三方活栓34の弾性体やバイアル37の蓋37aに刺しても、鈍針24bが弾性体や蓋37aを削り取って破損させることはない。また、カニューレ20は、金属に比べて強度や剛性がそれ程高くない樹脂材料で構成され、その鈍針24bの先端部が2段状の傾斜部に形成されているため、医療従事者や患者にこの鈍針24bが刺さるといった問題も生じない。また、鈍針24bは、先端側の外径が基端側の外径よりも大きく設定されたテーパ状に形成されているため、鈍針24bを三方活栓34の弾性体やバイアル37の蓋37aに差し込んだ際に、鈍針24bが弾性体や蓋37aから後退して外れることを防止できる。このため、薬液32等の吸引や供給を適正な状態で行える。   Furthermore, in the cannula 20 according to the present embodiment, the opening 25 is formed at the side of the distal end side portion of the blunt needle 24b, so that the blunt needle 24b is inserted into the elastic body of the three-way cock 34 and the lid 37a of the vial 37. However, the blunt needle 24b does not scrape and damage the elastic body or the lid 37a. In addition, the cannula 20 is made of a resin material that is not so high in strength and rigidity as compared with metal, and the blunt needle 24b has a tip portion formed in a two-step inclined portion. There is no problem that the blunt needle 24b is stuck. Further, since the blunt needle 24b is formed in a tapered shape in which the outer diameter on the distal end side is set larger than the outer diameter on the proximal end side, the blunt needle 24b is formed by the elastic body of the three-way stopcock 34 or the lid 37a of the vial 37. It is possible to prevent the blunt needle 24b from being retracted and removed from the elastic body or the lid 37a. For this reason, the chemical liquid 32 and the like can be sucked and supplied in an appropriate state.

(第2実施形態)
図10ないし図12は、本発明の第2実施形態に係るカニューレ40を示している。このカニューレ40では、カニューレ本体41が、取付け部23と同じ構造の取付け部43と、筒状穿刺部44とで構成されており、筒状穿刺部44は、基端側部44aとその先端部に形成された鈍針44bとで構成されている。そして、基端側部44aは、外周面の直径が全長にわたって略均一に設定され、内部の液体流路41aを形成する内周面の直径が基端部側が大きく先端側が小さく設定された筒状に形成されている。鈍針44bは、基端側部44a側の部分が基端側部44aよりも小さな直径の筒状に形成され、その先端に先細りになった先端部44cが形成されている。
(Second Embodiment)
10 to 12 show a cannula 40 according to a second embodiment of the present invention. In the cannula 40, the cannula main body 41 includes an attachment portion 43 having the same structure as the attachment portion 23 and a cylindrical puncture portion 44. The cylindrical puncture portion 44 includes a proximal end side portion 44a and a distal end portion thereof. And a blunt needle 44b formed on the surface. The base end side portion 44a has a cylindrical shape in which the diameter of the outer peripheral surface is set to be substantially uniform over the entire length, and the diameter of the inner peripheral surface forming the internal liquid channel 41a is set larger on the base end portion side and smaller on the front end side. Is formed. The blunt needle 44b is formed in a cylindrical shape having a diameter smaller than that of the base end side portion 44a on the base end side portion 44a side, and a tip end portion 44c that is tapered at the tip end is formed.

この先端部44cは、後端部が基端側部44aと略等しい太さに設定され、その先端部は、先端側が徐々に細くなった2段状の傾斜部で構成されて、前端面は閉塞されている。そして、鈍針44bにおける先端部44cの後部両側部に、液体流路41aに通じる開口部45が対向して形成されている。なお、液体流路41aにおける鈍針44bの内部に形成された部分は全長にわたって同径に形成されている。また、この筒状穿刺部44では、基端側部44aの外周面には係合溝部46が円周に沿って設けられているが、鈍針44bの外周面には係合溝部は設けられていない。   The distal end portion 44c has a rear end portion set to a thickness substantially equal to the proximal end side portion 44a, and the distal end portion is constituted by a two-step inclined portion whose distal end side is gradually narrowed. It is blocked. And the opening part 45 which leads to the liquid flow path 41a is formed in the back part both sides of the front-end | tip part 44c in the blunt needle 44b facing. In addition, the part formed in the inside of the blunt needle 44b in the liquid flow path 41a is formed in the same diameter over the full length. Further, in this cylindrical puncture portion 44, an engagement groove portion 46 is provided along the circumference on the outer peripheral surface of the proximal end side portion 44a, but an engagement groove portion is provided on the outer peripheral surface of the blunt needle 44b. Not.

また、カニューレ40が備える可動カニューレ部42は、筒状穿刺部44の外周面に沿って移動可能な本体部42bと、本体部42bが筒状穿刺部44の先端側に位置したときに、鈍針44bの先端より前方に突出する突出部42cとで構成されている。そして、可動カニューレ部42の内部に液体流路42aが形成され、その液体流路42aを形成する内周面は、可動カニューレ部42が筒状穿刺部44の基端部側に位置したときに、筒状穿刺部44の外周面と密着するように形成されている。そして、可動カニューレ部42の内周面における後部側部分に、係合溝部46と係合可能な係合突部47が円周に沿って設けられている。   The cannula 40 includes a movable cannula portion 42 that is movable when the main body portion 42b is movable along the outer peripheral surface of the cylindrical puncture portion 44, and the main body portion 42b is positioned on the distal end side of the cylindrical puncture portion 44. It is comprised by the protrusion part 42c which protrudes ahead from the front-end | tip of the needle 44b. A liquid channel 42 a is formed inside the movable cannula part 42, and the inner peripheral surface forming the liquid channel 42 a is located when the movable cannula part 42 is located on the proximal end side of the cylindrical puncture part 44. The cylindrical puncture part 44 is formed so as to be in close contact with the outer peripheral surface. An engagement protrusion 47 that can engage with the engagement groove 46 is provided on the rear side portion of the inner peripheral surface of the movable cannula 42 along the circumference.

また、突出部42cの先端部における両側部分には、開口部45と同じ大きさの本発明の側部開口としての切欠き開口部48が形成されている。この切欠き開口部48は、図11および図12に示したように、可動カニューレ部42が筒状穿刺部44の基端部側に位置したときに、開口部45と一致するように配置されている。また、切欠き開口部48の先端部は開放されて、可動カニューレ部42の先端部に形成された先端開口部48aに連通している。この切欠き開口部48と先端開口部48aとで、本発明に係る先端開口部が構成される。   Moreover, the notch opening part 48 as a side part opening of this invention of the same magnitude | size as the opening part 45 is formed in the both sides part in the front-end | tip part of the protrusion part 42c. As shown in FIGS. 11 and 12, the notch opening 48 is disposed so as to coincide with the opening 45 when the movable cannula portion 42 is located on the proximal end side of the cylindrical puncture portion 44. ing. Further, the distal end portion of the notch opening portion 48 is opened and communicates with the distal end opening portion 48 a formed at the distal end portion of the movable cannula portion 42. The notch opening 48 and the tip opening 48a constitute the tip opening according to the present invention.

したがって、可動カニューレ部42が筒状穿刺部44の基端部側に位置して、係合溝部46と係合突部47とが係合したときには、可動カニューレ部42は内周面を筒状穿刺部44の外周面に密着させて静止状態を維持する。また、可動カニューレ部42が筒状穿刺部44の先端部側に突出したときには、係合突部47が鈍針44bの外周面に密着状態で接触し、その接触によって、可動カニューレ部42の内周面と筒状穿刺部44の外周面との間が密閉された状態で可動カニューレ部42は静止状態を維持する。   Therefore, when the movable cannula portion 42 is positioned on the proximal end side of the cylindrical puncture portion 44 and the engagement groove 46 and the engagement protrusion 47 are engaged, the movable cannula portion 42 has a cylindrical inner peripheral surface. It is brought into close contact with the outer peripheral surface of the puncture unit 44 to maintain a stationary state. When the movable cannula part 42 protrudes toward the distal end side of the cylindrical puncture part 44, the engagement protrusion 47 comes into close contact with the outer peripheral surface of the blunt needle 44b. The movable cannula part 42 maintains a stationary state in a state where the space between the peripheral surface and the outer peripheral surface of the cylindrical puncture part 44 is sealed.

このように構成したことにより、可動カニューレ部42の軸方向の長さを長く設定しても、可動カニューレ部42を筒状穿刺部44の基端部側に位置させたときに、可動カニューレ部42が筒状穿刺部44の開口部45を塞ぐことがなくなる。このため、薬液等の注入・注出をスムーズに行える。これによって、可動カニューレ部42の取り付け位置や形状の設定に自由度が増すようになる。このカニューレ40のそれ以外の作用効果については、前述した第1実施形態に係るカニューレ20と同様である。また、この場合、欠き開口部48に代えて、先端開口部48aから離れた部分に窓状の開口部を設けてもよい。   With this configuration, even when the axial length of the movable cannula portion 42 is set long, when the movable cannula portion 42 is positioned on the proximal end side of the cylindrical puncture portion 44, the movable cannula portion 42 does not block the opening 45 of the cylindrical puncture portion 44. For this reason, injection | pouring and extraction | pouring of a chemical | medical solution etc. can be performed smoothly. This increases the degree of freedom in setting the mounting position and shape of the movable cannula part 42. The other operational effects of the cannula 40 are the same as those of the cannula 20 according to the first embodiment described above. In this case, a window-like opening may be provided in a portion away from the tip opening 48 a instead of the notch opening 48.

(第3実施形態)
図13ないし図15は、本発明の第3実施形態に係るカニューレ50を示している。このカニューレ50では、可動カニューレ部52の突出部52cに設けられる切欠き開口部58が突出部52cの側部の一方にだけ形成されている。このカニューレ50のそれ以外の部分の構成については、前述した第2実施形態に係るカニューレ40と同一である。したがって、同一部分に同一符号を記してその説明を省略する。ただし、図13ないし図15は、図10ないし図12をそれぞれ軸回り方向に90度回転した状態を示している。
(Third embodiment)
13 to 15 show a cannula 50 according to a third embodiment of the present invention. In the cannula 50, a notch opening 58 provided in the protrusion 52c of the movable cannula 52 is formed only on one side of the protrusion 52c. About the structure of the other part of this cannula 50, it is the same as the cannula 40 which concerns on 2nd Embodiment mentioned above. Therefore, the same reference numerals are given to the same parts and the description thereof is omitted. However, FIGS. 13 to 15 show a state in which FIGS. 10 to 12 are respectively rotated 90 degrees in the direction around the axis.

このように構成したことにより、可動カニューレ部52を前方に突出させ、この可動カニューレ部52を介して、薬液32等をカニューレ50内に注入したり、注出したりする場合には、可動カニューレ部52の液体流路42aとカニューレ本体41の液体流路41aとを2個の開口部45によって連通させるようになる。また、可動カニューレ部52を介さず、直接筒状穿刺部44から薬液32等をカニューレ50内に注入したり、注出したりする場合には、一方の開口部45が可動カニューレ部52によって閉塞されるため、他方の開口部45だけによってカニューレ50内と外部側部分とが連通する。このカニューレ50のそれ以外の作用効果については、前述した第2実施形態に係るカニューレ40と同様である。   With this configuration, when the movable cannula portion 52 protrudes forward, and when the medicinal solution 32 or the like is injected or poured out into the cannula 50 via the movable cannula portion 52, the movable cannula portion The two liquid channels 42 a and the liquid channel 41 a of the cannula main body 41 are communicated with each other through the two openings 45. In addition, when the drug solution 32 or the like is directly injected into the cannula 50 from the cylindrical puncture unit 44 or dispensed without the movable cannula unit 52, one opening 45 is blocked by the movable cannula unit 52. Therefore, the inside of the cannula 50 communicates with the outside portion only by the other opening 45. Other functions and effects of the cannula 50 are the same as those of the cannula 40 according to the second embodiment described above.

(第4実施形態)
図16ないし図18は、本発明の第4実施形態に係るカニューレ60を示している。このカニューレ60では、カニューレ本体61が、取付け部23等と同じ構造の取付け部63と、筒状部64とで構成されており、筒状部64は、筒状基端部64aとその先端部に形成された穿刺部64bとで構成されている。筒状基端部64aは、外周面の直径が全長にわたって略均一に設定され、内部の液体流路61aを形成する内周面の直径も全長にわたって略均一設定されている。そして、液体流路61aにおける筒状基端部64aの先端部に近い部分に係合溝部66が円周に沿って設けられている。
(Fourth embodiment)
16 to 18 show a cannula 60 according to a fourth embodiment of the present invention. In the cannula 60, the cannula body 61 is composed of an attachment part 63 having the same structure as the attachment part 23 and the like, and a cylindrical part 64. The cylindrical part 64 has a cylindrical base end part 64a and a distal end part thereof. And a puncture portion 64b formed in the above. In the cylindrical base end portion 64a, the diameter of the outer peripheral surface is set substantially uniformly over the entire length, and the diameter of the inner peripheral surface forming the internal liquid channel 61a is also set substantially uniformly over the entire length. And the engagement groove part 66 is provided in the part close | similar to the front-end | tip part of the cylindrical base end part 64a in the liquid flow path 61a along the periphery.

穿刺部64bは、筒状基端部64aよりも小さな直径の筒状に形成され、その先端部が斜め方向に切断されて尖鋭な先端部64cに形成されている。そして、先端部64cの先端に液体流路61aに通じる開口部65が形成されている。また、カニューレ60が備える可動カニューレ部62は、筒状部64の内周面に沿って移動可能な円筒状の本体部62bと、本体部62bの後端部外周に形成されたフランジ状の係合突部67とで構成されている。係合突部67は、係合溝部66に係合可能であるとともに、筒状基端部64aの内周面に対して圧接し任意の位置に可動カニューレ部62を静止させることができる。そして、可動カニューレ部62の内部に液体流路61aに連通可能な液体流路62aが形成されている。   The puncture portion 64b is formed in a cylindrical shape having a diameter smaller than that of the cylindrical base end portion 64a, and the distal end portion thereof is cut in an oblique direction to form a sharp distal end portion 64c. And the opening part 65 which leads to the liquid flow path 61a is formed in the front-end | tip of the front-end | tip part 64c. The cannula 60 includes a movable cannula part 62, a cylindrical main body part 62b movable along the inner peripheral surface of the cylindrical part 64, and a flange-like engagement formed on the outer periphery of the rear end of the main body part 62b. It is composed of a mating protrusion 67. The engaging protrusion 67 can be engaged with the engaging groove 66, and can be brought into pressure contact with the inner peripheral surface of the cylindrical base end portion 64a to make the movable cannula portion 62 stationary. A liquid channel 62 a that can communicate with the liquid channel 61 a is formed inside the movable cannula 62.

このカニューレ60によっても、アンプル31やバイアル37等の種々の容器に収容された薬液32等を効率よく吸引することができる。また、このカニューレ60では、可動カニューレ部62が筒状部64の内部側に位置するため、カニューレ60を取り扱う際に、邪魔にならなくなる。このカニューレ60のそれ以外の作用効果については、前述した第1実施形態に係るカニューレ20と同様である。   The cannula 60 can also efficiently suck the drug solution 32 and the like stored in various containers such as the ampule 31 and the vial 37. Moreover, in this cannula 60, since the movable cannula part 62 is located in the inside of the cylindrical part 64, it does not become obstructive when handling the cannula 60. The other operational effects of the cannula 60 are the same as those of the cannula 20 according to the first embodiment described above.

(第5実施形態)
図19ないし図21は、本発明の第5実施形態に係るカニューレ70を示している。このカニューレ70では、カニューレ本体71が、取付け部73と、筒状部74とで構成されている。筒状部74は、外周面の直径が全長にわたって略均一に設定され、内部の液体流路71aを形成する内周面の直径は、取付け部73側部分が大きく先端側に行くほど徐々に小さくなったテーパ状に形成されている。そして、液体流路71aを形成する筒状部74の内周面における先端部に近い部分に係合溝部76が円周に沿って設けられている。
(Fifth embodiment)
19 to 21 show a cannula 70 according to a fifth embodiment of the present invention. In the cannula 70, the cannula main body 71 includes an attachment portion 73 and a cylindrical portion 74. The cylindrical portion 74 has an outer peripheral surface having a substantially uniform diameter over its entire length, and the diameter of the inner peripheral surface forming the internal liquid channel 71a is gradually smaller as the mounting portion 73 side portion becomes larger and the tip side is approached. It is formed in a tapered shape. And the engagement groove part 76 is provided in the part close | similar to the front-end | tip part in the internal peripheral surface of the cylindrical part 74 which forms the liquid flow path 71a along the circumference.

また、カニューレ70が備える可動カニューレ部72は、筒状部74の内周面に沿って移動可能な本体部72bと、本体部72bの先端部に形成され穿刺部78とで構成されている。本体部72bは、外周面の直径と内周面の直径とが、ともに後端側部分が大きく先端側部分が小さく設定された円筒体で構成されており、後端部外周にフランジ状の係合突部77が形成されている。この係合突部77は、係合溝部76および液体流路71aにおける取付け部73と筒状部74との境界の段部に係合可能になっている。   The cannula 70 includes a movable cannula portion 72 that includes a main body portion 72b that can move along the inner peripheral surface of the cylindrical portion 74, and a puncture portion 78 that is formed at the distal end of the main body portion 72b. The main body 72b is formed of a cylindrical body in which the diameter of the outer peripheral surface and the diameter of the inner peripheral surface are both set so that the rear end portion is large and the front end portion is small. A mating protrusion 77 is formed. The engaging protrusion 77 can be engaged with the engaging groove portion 76 and a step portion at the boundary between the mounting portion 73 and the cylindrical portion 74 in the liquid flow path 71a.

また、穿刺部78は、円筒状に形成された鈍針で構成されている。そして、可動カニューレ部72内に形成された液体流路72aにおける穿刺部78の内部に形成された部分は、一定の内径に設定されているが、穿刺部78の外周部は、後部側から先端側に向って徐々に大径になるテーパ状に形成されている。また、穿刺部78の先端部は、先端側が徐々に細くなった2段状の傾斜部で構成されて、前端面は閉塞されている。そして、穿刺部78の先端側部分の両側部に、液体流路72aに通じる開口部75が対向して形成されている。また、可動カニューレ部72の外周面における本体部72bと穿刺部78との境界部には、穿刺部78がカニューレ本体71内に入り込むことを防止するためのフランジ状の進入防止部79が形成されている。   Moreover, the puncture part 78 is comprised with the blunt needle formed in the cylindrical shape. And the part formed in the inside of the puncture part 78 in the liquid flow path 72a formed in the movable cannula part 72 is set to the fixed internal diameter, but the outer peripheral part of the puncture part 78 is a front-end | tip from the rear side. It is formed in a tapered shape that gradually increases in diameter toward the side. In addition, the distal end portion of the puncture portion 78 is constituted by a two-step inclined portion whose distal end side is gradually narrowed, and the front end surface is closed. And the opening part 75 which leads to the liquid flow path 72a is formed in the both sides of the front end side part of the puncture part 78 facing. In addition, a flange-shaped intrusion prevention portion 79 for preventing the puncture portion 78 from entering the cannula main body 71 is formed at the boundary between the main body portion 72 b and the puncture portion 78 on the outer peripheral surface of the movable cannula portion 72. ing.

したがって、可動カニューレ部72が筒状部74の基端部側に位置したときには、液体流路71aにおける取付け部73と筒状部74との境界の段部に係合突部77が係合するとともに、進入防止部79が筒状部74の先端面に接触して、可動カニューレ部72は外周面を筒状部74の内周面に密着させて静止状態を維持する。また、可動カニューレ部72が筒状部74の先端部側に突出したときには、係合突部77と係合溝部76とが係合して、可動カニューレ部72は静止状態を維持する。このカニューレ70によると、穿刺部78を筒状部74の先方に長く伸ばした状態で、バイアル37の蓋37aや三方活栓34の弾性体部等に刺す必要がある場合に好適な使用が可能になる。   Therefore, when the movable cannula portion 72 is positioned on the proximal end side of the cylindrical portion 74, the engaging protrusion 77 engages with the stepped portion at the boundary between the mounting portion 73 and the cylindrical portion 74 in the liquid channel 71a. At the same time, the entry preventing portion 79 comes into contact with the distal end surface of the cylindrical portion 74, and the movable cannula portion 72 keeps the outer peripheral surface in close contact with the inner peripheral surface of the cylindrical portion 74 and maintains a stationary state. Further, when the movable cannula part 72 protrudes toward the distal end side of the cylindrical part 74, the engagement protrusion 77 and the engagement groove part 76 are engaged, and the movable cannula part 72 maintains a stationary state. According to this cannula 70, the puncture part 78 can be suitably used when it is necessary to puncture the lid 37a of the vial 37, the elastic body part of the three-way cock 34, etc. with the puncture part 78 extended to the end of the cylindrical part 74. Become.

また、本発明に係るカニューレは、前述した各実施形態に限定するものでなく、適宜変更実施が可能である。例えば、前述した各実施形態が備える各部分の構成を組み合わせを変更しながら使用することができ、これによって使用に多様性が生じる。また、各部分を構成する材料や形状についても、本発明の技術範囲内で適宜変更が可能である。   Further, the cannula according to the present invention is not limited to the above-described embodiments, and can be modified as appropriate. For example, the configuration of each part included in each of the above-described embodiments can be used while changing the combination, thereby generating diversity in use. Further, the material and shape constituting each part can be appropriately changed within the technical scope of the present invention.

本発明の第1実施形態に係るカニューレが取り付けられた注射器を示す正面図である。It is a front view which shows the syringe with which the cannula which concerns on 1st Embodiment of this invention was attached. 可動カニューレ部を前方に延ばした状態のカニューレを示す正面図である。It is a front view which shows the cannula of the state which extended the movable cannula part ahead. 可動カニューレ部を後退させた状態のカニューレを示す正面図である。It is a front view which shows the cannula in the state which retracted the movable cannula part. 図3の断面図である。FIG. 4 is a cross-sectional view of FIG. 3. アンプルを示す正面図である。It is a front view which shows an ampule. 図1に示した注射器でアンプル本体の薬液を吸引する状態を示す正面図である。It is a front view which shows the state which attracts | sucks the chemical | medical solution of an ampoule main body with the syringe shown in FIG. 図1に示した注射器で傾倒させたアンプル本体内に残った薬液を吸引する状態を示す正面図である。It is a front view which shows the state which attracts | sucks the chemical | medical solution which remained in the ampoule main body tilted with the syringe shown in FIG. 注射器から輸液ラインに薬液を供給する状態を示す一部切欠き正面図である。It is a partially notched front view which shows the state which supplies a chemical | medical solution from a syringe to an infusion line. 注射器でバイアルの薬液を吸引する状態を示す正面図である。It is a front view which shows the state which attracts | sucks the chemical | medical solution of a vial with a syringe. 第2実施形態に係るカニューレの可動カニューレ部を前方に延ばした状態を示す正面図である。It is a front view which shows the state which extended the movable cannula part of the cannula which concerns on 2nd Embodiment ahead. 図11のカニューレの可動カニューレ部を後退させた状態を示す正面図である。It is a front view which shows the state which retracted the movable cannula part of the cannula of FIG. 図11の断面図である。It is sectional drawing of FIG. 第3実施形態に係るカニューレの可動カニューレ部を前方に延ばした状態を示す正面図である。It is a front view which shows the state which extended the movable cannula part of the cannula which concerns on 3rd Embodiment ahead. 図13のカニューレの可動カニューレ部を後退させた状態を示す正面図である。It is a front view which shows the state which retracted the movable cannula part of the cannula of FIG. 図13の断面図である。It is sectional drawing of FIG. 第4実施形態に係るカニューレの可動カニューレ部を前方に延ばした状態を示す正面図である。It is a front view which shows the state which extended the movable cannula part of the cannula which concerns on 4th Embodiment to the front. 図16のカニューレの可動カニューレ部を後退させた状態を示す正面図である。It is a front view which shows the state which retracted the movable cannula part of the cannula of FIG. 図17の断面図である。It is sectional drawing of FIG. 第5実施形態に係るカニューレの可動カニューレ部を前方に延ばした状態を示す正面図である。It is a front view which shows the state which extended the movable cannula part of the cannula which concerns on 5th Embodiment to the front. 図19のカニューレの可動カニューレ部を後退させた状態を示す正面図である。It is a front view which shows the state which retracted the movable cannula part of the cannula of FIG. 図20の断面図である。It is sectional drawing of FIG.

符号の説明Explanation of symbols

20,40,50,60,70…カニューレ、21,41,61,71…カニューレ本体、21a,22a,41a,42a,61a,62a,71a,72a…液体流路、22,42,52,62,72…可動カニューレ部、24,44…筒状穿刺部、24a…基端部、25,45,65,75…開口部、26a,26b,46,66,76…係合溝部、27,47,67,77…係合突部、28,48a…先端開口部、44a…基端側部、48,58…切欠き開口部、64,78,74…筒状部、64b…穿刺部、64a…筒状基端部。
20, 40, 50, 60, 70 ... cannula, 21, 41, 61, 71 ... cannula body, 21a, 22a, 41a, 42a, 61a, 62a, 71a, 72a ... liquid flow path, 22, 42, 52, 62 , 72 ... movable cannula part, 24, 44 ... cylindrical puncture part, 24a ... proximal end part, 25, 45, 65, 75 ... opening part, 26a, 26b, 46, 66, 76 ... engagement groove part, 27, 47 , 67, 77 ... engagement protrusion, 28, 48a ... distal end opening, 44a ... proximal end side, 48, 58 ... notch opening, 64, 78, 74 ... cylindrical part, 64b ... puncture part, 64a ... Cylindrical base end.

Claims (6)

先端側部分に開口部が形成された筒状穿刺部を含み内部に前記開口部に連通する液体流路が形成されたカニューレ本体と、先端側部分に先端開口部が形成され内部に前記先端開口部に連通する連通液体流路が形成された筒状の可動カニューレ部とを備えたカニューレであって、
前記先端開口部を前記開口部と同じ位置または前記開口部よりも前記筒状穿刺部の基端部側に後退させた位置と、前記先端開口部を前記筒状穿刺部の先端部よりも前方に進出させた位置との間で移動可能な状態で、前記可動カニューレ部を前記カニューレ本体に取り付け、前記可動カニューレが前方に進出したときに、前記連通液体流路が前記液体流路に連通して前方に伸びるようにしたことを特徴とするカニューレ。
A cannula body including a cylindrical puncture portion having an opening formed in the distal end portion and having a liquid flow channel communicating with the opening therein, and a distal opening formed in the distal end portion and the distal end opening therein A cannula having a cylindrical movable cannula part in which a communication liquid channel communicating with the part is formed,
The front end opening is located at the same position as the opening or a position where the front end opening is retracted to the proximal end side of the cylindrical puncture portion with respect to the opening, and the front end opening is forward of the front end portion of the cylindrical puncture portion. The movable cannula part is attached to the cannula body in a state where the movable cannula is advanced to the position where the movable liquid cannula is moved forward, and the communicating liquid channel communicates with the liquid channel. A cannula characterized by extending forward.
前記可動カニューレ部を前記筒状穿刺部の基端部側に後退させた位置と前記可動カニューレ部を前記筒状穿刺部の先端部側に進出させた位置とに、それぞれ前記可動カニューレ部を前記筒状穿刺部に対して静止させるための係合部を設けた請求項1に記載のカニューレ。   The movable cannula part is moved to a position where the movable cannula part is retracted toward the proximal end side of the cylindrical puncture part and a position where the movable cannula part is advanced toward the distal end side of the cylindrical puncture part, respectively. The cannula according to claim 1, further comprising an engaging portion for making the tube puncture portion stationary. 前記筒状穿刺部の先端部を閉塞して前記筒状穿刺部の先端側部分の側部に前記開口部を形成するとともに、前記可動カニューレ部を前記筒状穿刺部の外周面側に取り付け、前記可動カニューレ部が前記筒状穿刺部の基端部側に後退したときに前記筒状穿刺部の先端側部分が露呈し、前記可動カニューレ部が前記筒状穿刺部の先端部側に進出したときに前記筒状穿刺部の先端部が前記可動カニューレ部によって覆われるようにした請求項1または2に記載のカニューレ。   Closing the distal end of the tubular puncture portion to form the opening in the side portion of the distal end portion of the tubular puncture portion, and attaching the movable cannula portion to the outer peripheral surface side of the tubular puncture portion; When the movable cannula portion is retracted to the proximal end side of the cylindrical puncture portion, the distal end side portion of the cylindrical puncture portion is exposed, and the movable cannula portion has advanced to the distal end side of the cylindrical puncture portion The cannula according to claim 1 or 2, wherein a tip end portion of the cylindrical puncture portion is sometimes covered with the movable cannula portion. 前記可動カニューレ部が前記筒状穿刺部の基端部側に後退したときに前記筒状穿刺部の開口部に対応する前記可動カニューレ部の側部に、前記開口部と連通し、前記先端開口部の一部を構成する側部開口部を形成した請求項3に記載のカニューレ。   When the movable cannula part is retracted to the proximal end part side of the cylindrical puncture part, the side part of the movable cannula part corresponding to the opening part of the cylindrical puncture part communicates with the opening part, and the distal end opening The cannula according to claim 3, wherein a side opening constituting a part of the part is formed. 前記筒状穿刺部の先端部に前記開口部を形成するとともに、前記可動カニューレ部を前記筒状穿刺部の内周面側に取り付け、前記可動カニューレ部が前記筒状穿刺部の基端部側に後退したときに前記可動カニューレ部の先端部は前記筒状穿刺部内に入り込み、前記可動カニューレ部が前記筒状穿刺部の先端部側に進出したときに前記可動カニューレ部の先端部は前記筒状穿刺部の先端部から突出するようにした請求項1または2に記載のカニューレ。   The opening is formed at the distal end portion of the cylindrical puncture portion, the movable cannula portion is attached to the inner peripheral surface side of the cylindrical puncture portion, and the movable cannula portion is on the proximal end side of the cylindrical puncture portion When the movable cannula part moves into the cylindrical puncture part, the distal end part of the movable cannula part moves into the cylindrical puncture part. The cannula according to claim 1 or 2, wherein the cannula protrudes from a distal end portion of the puncture portion. 先端部に先端開口部が形成された筒状部を含み内部に前記先端開口部に連通する液体流路が形成されたカニューレ本体と、先端側部分に開口部が形成された穿刺部を含み内部に前記開口部および前記カニューレ本体の液体流路と連通する連通液体流路が形成された可動カニューレ部とを備えたカニューレであって、
前記可動カニューレ部を前記筒状部の内周面側に取り付け、前記可動カニューレ部が前記穿刺部を前記筒状部の先端部から突出させた状態で、前記筒状部に対して進退できるようにしたことを特徴とするカニューレ。
A cannula body including a cylindrical portion having a tip opening formed at the tip and including a liquid channel communicating with the tip opening inside, and a puncture portion having an opening formed at the tip side. A movable cannula part formed with a communicating liquid channel communicating with the opening and the liquid channel of the cannula body,
The movable cannula part is attached to the inner peripheral surface side of the cylindrical part, and the movable cannula part can advance and retreat with respect to the cylindrical part with the puncture part protruding from the distal end part of the cylindrical part. A cannula characterized by that.
JP2004201084A 2004-07-07 2004-07-07 Cannula Expired - Fee Related JP4414296B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0767934A (en) * 1993-08-02 1995-03-14 Becton Dickinson & Co Liquid chemical access assembly for vial and ampul
JP2001502589A (en) * 1996-12-19 2001-02-27 バイオ−プレクサス・インコーポレーテツド Self-dulling needle medical devices and methods for their manufacture
JP2002017856A (en) * 2000-07-06 2002-01-22 Terumo Corp Liquid leader
JP2002519133A (en) * 1998-07-02 2002-07-02 ホワイト、スポット、アクチェンゲゼルシャフト Device for introducing fibrin adhesive into perforated conduit
JP2003284759A (en) * 2002-03-27 2003-10-07 Jms Co Ltd Liquid absorbing device
JP2003339878A (en) * 2002-05-22 2003-12-02 Nippon Sherwood Medical Industries Ltd Inverted taper-shaped cannula

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0767934A (en) * 1993-08-02 1995-03-14 Becton Dickinson & Co Liquid chemical access assembly for vial and ampul
JP2001502589A (en) * 1996-12-19 2001-02-27 バイオ−プレクサス・インコーポレーテツド Self-dulling needle medical devices and methods for their manufacture
JP2002519133A (en) * 1998-07-02 2002-07-02 ホワイト、スポット、アクチェンゲゼルシャフト Device for introducing fibrin adhesive into perforated conduit
JP2002017856A (en) * 2000-07-06 2002-01-22 Terumo Corp Liquid leader
JP2003284759A (en) * 2002-03-27 2003-10-07 Jms Co Ltd Liquid absorbing device
JP2003339878A (en) * 2002-05-22 2003-12-02 Nippon Sherwood Medical Industries Ltd Inverted taper-shaped cannula

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