WO2020158473A1 - コネクタ - Google Patents

コネクタ Download PDF

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Publication number
WO2020158473A1
WO2020158473A1 PCT/JP2020/001636 JP2020001636W WO2020158473A1 WO 2020158473 A1 WO2020158473 A1 WO 2020158473A1 JP 2020001636 W JP2020001636 W JP 2020001636W WO 2020158473 A1 WO2020158473 A1 WO 2020158473A1
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WIPO (PCT)
Prior art keywords
connector
shaped
upright
flow path
flow paths
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Application number
PCT/JP2020/001636
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English (en)
French (fr)
Inventor
勇輝 間中
大輔 中川
拓弥 八島
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株式会社トップ
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Publication of WO2020158473A1 publication Critical patent/WO2020158473A1/ja

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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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • 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

Definitions

  • the present invention relates to a connector used for mixed injection into an infusion line.
  • the connector has a connector body including an inflow port through which a liquid such as an infusion solution flows from an infusion line, an outflow port through which the liquid flows out to the infusion line, and a connection space portion connecting the inflow port and the outflow port.
  • a flexible bottomed tubular member that is connected to the connector body and forms a mixed injection passage used for mixed infusion to an infusion line; and a cover member that covers the bottomed tubular member and is fixed to the connector body.
  • the bottomed tubular member is internally connected to the connector body in an inverted state so that a hollow portion communicating with the connection space portion is provided inside and the bottom surface is located in a direction away from the connection space portion. Further, the bottomed cylindrical member has a mixed injection port on the bottom surface, and the mixed injection port is a cavity when the bottomed cylindrical member is pressed toward the connection space by the tip of the injection cylinder used for the mixed injection. Communicate with the department.
  • liquid such as infusion solution that has flowed in from the infusion line via the inflow port flows out from the connection space portion to the infusion line via the outflow port as it is, except when performing mixed injection.
  • the hollow portion becomes a dead space that is not affected by the flow of the liquid from the inlet to the outlet, the liquid such as the infusion will once stay in the hollow portion and stay there. There is inconvenience.
  • An object of the present invention is to provide a connector that can eliminate such an inconvenience and reduce the amount of liquid such as infusion solution that stays in the cavity.
  • the connector of the present invention is a connector that is connected in the middle of an infusion line and is used for mixed injection into the infusion line, and is a connector that is upright from the bottom and has a U-shaped groove at the top.
  • a disk-shaped connector main body including a second upright member and a third upright member sandwiched between the first and second upright members and upright from the bottom and having a partition member on the upper part, and the first to third parts.
  • the first and second flow paths are formed between the upright member and the U-shaped groove portions of the first and second upright members, and the third upright member and An inverted U-shaped notch portion that accommodates the partition member between and forms a connection space portion that connects the first and second flow paths, and a cavity that communicates with an upper portion of the connection space portion and accommodates the partition member
  • a flexible tower-shaped member including an inner wall portion that forms a portion and a mixed injection port that communicates with the hollow portion, and a top surface of the flexible tower-shaped member is exposed while the side surface is covered to the connector body.
  • a cover member that is fixed and that has an inflow port that communicates with the first flow channel and through which liquid flows from the infusion line, and an outflow port that communicates with the second flow channel and through which liquid flows out of the infusion line. And is provided.
  • the flexible tower-shaped member straddles the first to third upright members of the connector main body by the inverted U-shaped notch and is closely attached to the side surface thereof, First and second flow paths and a connection space portion connecting the first and second flow paths are formed.
  • the flexible tower member is fixed to the connector main body by the cover member, the first flow path communicates with an inflow port of the cover member, and the second flow path has an outflow port of the cover member.
  • the partition member is housed in the connection space part and the cavity part communicating with the connection space part.
  • the liquid supplied by the infusion line flows into the connection space portion from the inflow port through the first flow path, It flows out from the outlet to the infusion line via the second flow path.
  • the hollow portion communicates with the upper portion of the connection space portion, and when the liquid flows into the hollow portion, it stays in the hollow portion as it is, and there is a concern that the hollow portion becomes a dead space. ..
  • the connector of the present invention is provided with the partition member above the third upright member, and the partition member is housed in the connection space portion and the cavity portion. Therefore, the inner volume of the connection space portion and the hollow portion is limited by the partition member, and the dead space in which the liquid stays can be reduced.
  • the flexible tower-shaped member is pressed toward the connection space portion by the tip of the injection cylinder for mixed injection.
  • the bottom of the mixed injection port communicates with the cavity, and the injection cylinder allows mixed injection into the infusion line.
  • the flexible tower-shaped member bends and bulges toward the cover member side. If the bulging is restricted by the cover member, it may be difficult to press the flexible tower-shaped member by the tip of the injection cylinder.
  • the first and second flow paths are linearly arranged, and the cover member has a gap between the flexible tower-shaped member on both sides of the straight line. .. Since the cover member has a gap between the flexible tower-shaped member on both sides of the straight line, when the flexible tower-shaped member is pressed toward the connection space portion, the cover member side. Since the portion that bulges out can be accommodated in the gap, it is possible to easily press the flexible tower-shaped member by the tip of the injection cylinder.
  • the first and second flow paths are located linearly, and the partition member has an elliptic truncated cone shape whose long axis is orthogonal to the straight line.
  • the partition member has an elliptical frustum shape, and the major axis of the elliptical frustum shape is orthogonal to the straight line, so that the liquid flowing into the connection space portion from the first flow path has the elliptical frustum shape. It is possible to guide the liquid along the side surface into the hollow portion, and further to guide the liquid folded at the upper end of the hollow portion to the second flow path, thereby further reducing the liquid retained in the hollow portion. it can.
  • the partition member has a slanted columnar shape instead of the elliptical truncated cone shape, and the slanted columnar slanted surface extends from the first flow path side to the second flow channel side. More preferably, it becomes gradually higher toward the roadside.
  • the partition member is in the shape of the slanted column, the liquid can be easily flowed along the inclined surface of the slanted column by flowing the liquid flowing into the connection space portion from the first flow path. The liquid can be guided to the inside of the cavity, and the amount of the liquid retained in the cavity can be further reduced.
  • FIG. 2 is an assembly view of the connector shown in FIG. 1.
  • FIG. 3A is a sectional view taken along the line III-III in FIG. 3B is a sectional view taken along line BB of FIG. 3A.
  • FIG. 3C is a sectional view taken along line CC of FIG. 3A.
  • FIG. 5A is a plan view showing another configuration example of the connector of the present invention.
  • 5B is a sectional view taken along line BB of FIG. 5A.
  • FIG. 6A is an explanatory cross-sectional view showing a state in which the flexible tower-shaped member is pressed toward the connection space portion by the tip portion of the injection cylinder in the configuration example of the cross-section shown in FIG. 5A.
  • 6B is a sectional view taken along line BB of FIG. 6A.
  • the perspective view which shows the structure of the connector main body in the further another structural example of the connector of this invention.
  • FIG. 8 is an explanatory sectional view showing a case where the connector body shown in FIG. 7 is used in the configuration example of the section shown in FIG. 3A.
  • the connector 1 of the present embodiment is a medical instrument that is connected in the middle of an infusion line (not shown) and is used for mixed injection of a drug solution or the like into the infusion line. 2, a flexible tower-shaped member 3, and a cover member 4 that covers the flexible tower-shaped member 3 and is fixed to the connector body 2.
  • the connector body 2 includes first and second upright members 21a and 21b that are upright from the bottom and a third upright member 22 that is upright from the bottom.
  • the first and second upright members 21a, 21b are plate-shaped, are formed linearly on the bottom of the connector body 2, and are provided with U-shaped grooves 23a, 23b on their upper portions.
  • the third upright member 22 has a columnar shape, is sandwiched between the first and second plate-shaped upright members 21a and 21b, and is provided with an elliptic truncated cone-shaped partition member 24 on the upper portion.
  • the flexible tower-shaped member 3 has a substantially cylindrical shape, and includes an inverted U-shaped cutout portion 31, an inner wall portion 33 (see FIG. 3) that forms a cavity 32 that communicates with the inverted U-shaped cutout portion 31, and a ceiling. And a mixed injection port 35 opening to the surface 34.
  • the cover member 4 includes a hollow large-diameter cover portion 41 that accommodates the lower portion of the flexible tower-shaped member 3 and a hollow small-diameter cover portion 42 that accommodates the upper portion of the flexible tower-shaped member 3, and has a large diameter.
  • the cover part 41 is provided with an inflow port 43 through which the liquid flows in from the infusion line, and an outflow port 44 through which the liquid flows out into the infusion line.
  • the inflow port 43 is formed in the normal direction from the side surface of the large diameter cover portion 41, and the outflow port 44 is formed in the normal line direction from the side surface of the large diameter cover portion 41 which is symmetrical with respect to the inflow port 43.
  • the inlet 43 and the outlet 44 are linearly arranged.
  • the small-diameter cover portion 42 is provided with a male screw portion 45 to which a lock cylinder (not shown) of an injection cylinder is screwed on the outer peripheral surface, while a hole portion 46 exposing the top surface 34 of the flexible tower-shaped member 3. Equipped with.
  • the flexible tower-shaped member 3 has the inverted U-shaped notch 31 that straddles the first to third upright members 21a, 21b, 22. Then, the first and second flow paths 36a and 36b are formed linearly between the U-shaped groove portions 23a and 23b of the first and second upright members 21a and 21b.
  • the flexible tower-shaped member 3 is a connection that accommodates the partition member 24 between the first and second flow paths 36a and 36b and connects the first and second flow paths 36a and 36b.
  • the space 37 is formed.
  • connection space portion 37 has a gap between it and the partition member 24, and the partition member 24 has a first and a first elliptical frustum-shaped long axes formed linearly in the connection space portion 37. It is arranged so as to be orthogonal to the two flow paths 36a and 36b.
  • the cavity portion 32 communicates with the upper portion of the connection space portion 37 and accommodates the partition member 24 with a gap between the cavity member 32 and the partition member 24.
  • the mixed injection port 35 has a rhombic shape in plan view and opens on the top surface 34 of the flexible tower-shaped member 3.
  • the mixed injection port 35 is normally closed, and when the flexible tower-shaped member 3 is pressed in the direction of the connection space 37 by the tip portion 5 (see FIG. 4) of the injection cylinder used for mixed injection, the mixed injection port 35 is provided in the cavity 32. Communicate.
  • the cover member 4 exposes the top surface 34 of the flexible tower-shaped member 3 while the side surface is fixed and fixed to the connector main body 2.
  • the outlet 44 communicates with the first flow path 36a, and communicates with the second flow path 36b.
  • the connector 1 when connected to the middle of an infusion line (not shown), a liquid such as an infusion solution that has flowed in from the infusion line through the inflow port 43 is indicated by an arrow in FIG. 3A.
  • the first flow path 36a guides the connection space 37, and in the connection space 37, the partition member 24 is introduced into the cavity 32 along the side surface of the partition member 24 on the first flow path 36a side.
  • the liquid introduced into the hollow portion 32 is folded back at the upper end of the hollow portion 32, guided to the second flow passage 36b by the side surface of the partition member 24 on the side of the second flow passage 36b, and passed through the outflow port 44 to the infusion line. Spill to. Therefore, in the connector 1, the liquid such as the infusion can be allowed to flow out to the infusion line without accumulating in the cavity 32.
  • connection space portion 37 a part of the liquid guided to the connection space portion 37 goes around the partition member 24 and flows into the second flow path 36b, as shown by the arrow in FIG. 3C.
  • the distal end portion 5 of the injection cylinder containing the liquid medicine to be mixed injected is inserted into the hole portion 46 of the cover member 4 and is flexible.
  • the top surface 34 of the sex tower-shaped member 3 is pressed toward the connection space portion 37. With this configuration, the mixed injection port 35 communicates with the cavity 32 as described above.
  • the injection cylinder is provided with a lock cylinder (not shown) which is an outer cylinder provided on the outer peripheral side of the distal end portion 5 and has an internal thread portion formed on the inner peripheral surface
  • the female thread of the lock cylinder is provided.
  • the portion can be screwed into a male screw portion 45 formed on the outer peripheral surface of the small diameter cover portion 42.
  • the liquid medicine or the like contained in the injection cylinder is injected from the tip portion 5 of the injection cylinder into the cavity 32 as shown by the arrow, and the liquid for the infusion line is Mixed injection of chemicals is performed.
  • the flexible tower-shaped member 3 is pressed against the distal end portion 5 of the injection cylinder to compress the hollow portion 32 and reduce the internal volume thereof, and the medicinal solution and the like are filled with the hollow portion 32.
  • FIGS. 5A and 5B another aspect of the connector 1 is shown in FIGS. 5A and 5B.
  • the large-diameter cover portion 41 of the cover member 4 has flexible tower-shaped members 3 on both sides of a straight line formed by the first and second flow paths 36a and 36b. There is a gap 47 between and.
  • the flexible tower-shaped member 3 Since the connector 1 has the large-diameter cover portion 41 of the cover member 4 and the flexible tower-shaped member 3 with a gap 47 between them, the flexible tower-shaped member 3 is formed as shown in FIGS. 6A and 6B. Since the bulging portion of the flexible tower-shaped member 3 can be accommodated in the gap 47 when the distal end portion 5 of the syringe barrel is pressed in the direction of the connection space 37, the distal end portion 5 of the syringe barrel can be used. The flexible tower-shaped member 3 can be easily pressed.
  • FIG. 7 shows another mode of the connector 1.
  • the connector 1 includes a partition member 25 in the shape of a slanting column in the upper part of the third upright member 22 of the connector body 2 instead of the partition member 24 in the shape of an elliptic truncated cone.
  • the partition member 25 includes an inclined surface 26 that gradually increases from the first flow path 36a side toward the second flow path 36b side.
  • the connector 1 includes the partition member 25 having a slanting column shape, as shown by an arrow in FIG. 8, the infusion liquid that has flowed into the connection space portion 37 from the infusion line through the inflow port 43 and the first flow path 36a.
  • a liquid such as the above along the inclined surface 26 of the partition member 25
  • the connector 1 including the partition member 25 having a slanting column shape the liquid retained in the cavity 32 can be further reduced.

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

Abstract

空洞部に滞留する輸液等の液体を低減することができるコネクタを提供する。コネクタ１は輸液ラインの途中に接続されて混注に用いられる。上部にＵ字溝部２３ａ，２３ｂを備える直立部材２１ａ，２１ｂと、上部に仕切り部材２４，２５を備える直立部材２２とを備える円盤状のコネクタ本体２と、直立部材２１ａ，２１ｂのＵ字溝部２３ａ，２３ｂとの間に流路３６ａ，３６ｂを形成し、かつ、流路３６ａ，３６ｂを接続する接続空間部３７を形成する逆Ｕ字状切欠部３１と、仕切り部材２４，２５を収容する空洞部３２を形成する内壁部３３と、混注口３５とを備える可撓性塔状部材３１と、可撓性塔状部材３をコネクタ本体２に固定し、かつ、流路３６ａに連通する流入口４３と、流路３６ｂに連通する流出口４４とを備えるカバー部材４とを備える。

Description

コネクタ
　本発明は、輸液ラインに対する混注に用いられるコネクタに関する。
　従来、輸液ラインの途中に接続されて該輸液ラインに対する薬液等の混注に用いられるコネクタが知られている（例えば、特許文献１参照）。
　前記コネクタは、輸液ラインから輸液等の液体が流入する流入口と、該液体が該輸液ラインに流出する流出口と、該流入口と該流出口とを接続する接続空間部とを備えるコネクタ本体と、コネクタ本体に接続されて輸液ラインに対する混注に用いられる混注路を形成する可撓性の有底筒状部材と、該有底筒状部材を覆って該コネクタ本体に固定するカバー部材とを備える。
　前記有底筒状部材は、内部に接続空間部に連通する空洞部を備え、底面が接続空間部から離間する方向に位置するように、倒立状態で前記コネクタ本体に接続される。また、前記有底筒状部材は底面に混注口を備えており、混注口は該有底筒状部材が該混注に用いられる注射筒の先端部により接続空間部方向に押圧されることにより空洞部に連通する。
特開２００４－２０９２７８号公報
　特許文献１に記載の前記コネクタでは、混注を行うとき以外は、輸液ラインから流入口を介して流入した輸液等の液体はそのまま接続空間部から流出口を介して輸液ラインに流出する。
　しかしながら、前記空洞部は流入口から流出口に至る液体の流れに影響を受けない死空間となるので、前記輸液等の液体は一旦空洞部に流入するとそのまま該空洞部に滞留することになるという不都合がある。
　本発明は、かかる不都合を解消して、空洞部に滞留する輸液等の液体を低減することができるコネクタを提供することを目的とする。
　かかる目的を達成するために、本発明のコネクタは、輸液ラインの途中に接続されて該輸液ラインに対する混注に用いられるコネクタであって、底部から直立し上部にＵ字溝部を備える第１及び第２の直立部材と、該第１及び第２の直立部材に挟まれて底部から直立し上部に仕切り部材を備える第３の直立部材とを備える円盤状のコネクタ本体と、該第１～第３の直立部材を跨いでその側面に密着し該第１及び第２の直立部材のＵ字溝部との間に第１及び第２の流路を形成し、かつ、該第３の直立部材との間に該仕切り部材を収容し該第１及び第２の流路を接続する接続空間部を形成する逆Ｕ字状切欠部と、該接続空間部の上部に連通し該仕切り部材を収容する空洞部を形成する内壁部と、該空洞部に連通する混注口とを備える可撓性塔状部材と、該可撓性塔状部材の天面を露出させる一方、側面を覆って該コネクタ本体に固定し、かつ、該第１の流路に連通し該輸液ラインから液体が流入する流入口と、該第２の流路に連通し液体が該輸液ラインに流出する流出口とを備えるカバー部材とを備えることを特徴とする。
　本発明のコネクタによれば、前記可撓性塔状部材が、逆Ｕ字状切欠部により、前記コネクタ本体の前記第１～第３の直立部材を跨いでその側面に密着することにより、前記第１及び第２の流路と、該第１及び第２の流路を接続する接続空間部とを形成する。前記可撓性塔状部材は、前記カバー部材により前記コネクタ本体に固定され、前記第１の流路が該カバー部材の流入口に連通し、前記第２の流路が該カバー部材の流出口に連通し、かつ、前記接続空間部と該接続空間部に連通する前記空洞部に前記仕切り部材を収容する。
　そこで、本発明のコネクタは、輸液ラインの途中に接続されたときには、該輸液ラインにより供給される液体が、前記流入口から前記第１の流路を介して前記接続空間部に流入し、前記第２の流路を介して前記流出口から該輸液ラインに流出する。このとき、前記接続空間部の上部には前記空洞部が連通しており、該空洞部に前記液体が流入するとそのまま該空洞部に滞留し、該空洞部が死空間となることが懸念される。
　しかし、本発明のコネクタは、前記第３の直立部材の上部に前記仕切り部材を備えており、該仕切り部材は前記接続空間部と前記空洞部とに収容されている。従って、前記接続空間部と前記空洞部との内容積は前記仕切り部材により制限されることとなり、前記液体が滞留する死空間を低減することができる。
　また、本発明のコネクタは、混注時には混注を行う注射筒の先端により前記可撓性塔状部材が前記接続空間部方向に押圧される。このようにすると、前記混注口の底部が前記空洞部に連通し、前記注射筒により前記輸液ラインに対する混注が可能になる。一方、前記注射筒の先端により前記可撓性塔状部材が前記接続空間部方向に押圧されると、該可撓性塔状部材が撓んで前記カバー部材側に膨出することになるが、該膨出が該カバー部材により規制されると該注射筒の先端による該可撓性塔状部材の押圧が困難になることがある。
　そこで、本発明のコネクタにおいて、前記第１及び第２の流路は直線状に位置し、前記カバー部材は該直線の両側において前記可撓性塔状部材との間に間隙を存することが好ましい。前記カバー部材が前記直線の両側において前記可撓性塔状部材との間に間隙を存することにより、該可撓性塔状部材が前記接続空間部方向に押圧されたときに、該カバー部材側に膨出する部分を前記間隙に収容することができるので、前記注射筒の先端による前記可撓性塔状部材の押圧を容易に行うことができる。
　また、本発明のコネクタにおいて、前記第１及び第２の流路は直線状に位置し、前記仕切り部材は長軸が該直線に直交する楕円錐台形状であることが好ましい。前記仕切り部材が楕円錐台形状であり、該楕円錐台形状の長軸が前記直線に直交することにより、前記第１の流路から前記接続空間部に流入した液体を該楕円錐台形状の側面に沿って前記空洞部内に案内し、さらに該空洞部の上端で折り返した該液体を前記第２の流路に案内することができ、該空洞部に滞留する該液体をより低減することができる。
　また、本発明のコネクタにおいて、前記仕切り部材は、前記楕円錐台形状に代えて、斜切円柱状であり、該斜切円柱状の傾斜面が該第１の流路側から該第２の流路側に向けて次第に高くなることがさらに好ましい。前記仕切り部材が前記斜切円柱状である場合には、前記第１の流路から前記接続空間部に流入した液体を該斜切円柱状の傾斜面に沿って流すことにより、容易に前記空洞部内に案内することができ、該空洞部に滞留する該液体をさらに低減することができる。
本発明のコネクタの一構成例を示す斜視図。 図１に示すコネクタの組立図。 図３Ａは図１のIII－III線断面図。 図３Ｂは図３ＡのＢ－Ｂ線断面図。 図３Ｃは図３ＡのＣ－Ｃ線断面図。 図３Ａに示す断面の構成例において、注射筒の先端部により可撓性塔状部材を接続空間部方向に押圧した状態を示す説明的断面図。 図５Ａは本発明のコネクタの他の構成例を示す平面図。 図５Ｂは図５ＡのＢ－Ｂ線断面図。 図６Ａは図５Ａに示す断面の構成例において、注射筒の先端部により可撓性塔状部材を接続空間部方向に押圧した状態を示す説明的断面図。 図６Ｂは図６ＡのＢ－Ｂ線断面図。 本発明のコネクタのさらに他の構成例におけるコネクタ本体の構成を示す斜視図。 図３Ａに示す断面の構成例において、図７に示すコネクタ本体を用いた場合を示す説明的断面図。
　次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。
　図１及び図２に示すように、本実施形態のコネクタ１は、図示しない輸液ラインの途中に接続されて該輸液ラインに対する薬液等の混注に用いられる医療用器具であり、円盤状のコネクタ本体２と、可撓性塔状部材３と、可撓性塔状部材３を覆ってコネクタ本体２に固定するカバー部材４とからなる。
　コネクタ本体２は、底部から直立する第１及び第２の直立部材２１ａ，２１ｂと、底部から直立する第３の直立部材２２とを備える。第１及び第２の直立部材２１ａ，２１ｂは板状であってコネクタ本体２の底部に直線状に形成されており、それぞれの上部にＵ字溝部２３ａ，２３ｂを備えている。また、第３の直立部材２２は円柱状であって第１及び第２の板状直立部材２１ａ，２１ｂの間に挟まれており、上部に楕円錐台形状の仕切り部材２４を備えている。
　可撓性塔状部材３は略円筒状であり、逆Ｕ字状切欠部３１と、逆Ｕ字状切欠部３１に連通する空洞部３２を形成する内壁部３３（図３参照）と、天面３４に開口する混注口３５とを備える。
　カバー部材４は、可撓性塔状部材３の下部を収容する中空の大径カバー部４１と、可撓性塔状部材３の上部を収容する中空の小径カバー部４２とを備え、大径カバー部４１は輸液ラインから液体が流入する流入口４３と、液体が該輸液ラインに流出する流出口４４とを備えている。流入口４３は大径カバー部４１の側面から法線方向に形成され、流出口４４は流入口４３に対して対称となる大径カバー部４１の側面から法線方向に形成されており、流入口４３と流出口４４とが直線状に配置されている。また、小径カバー部４２は、外周面に注射筒のロック筒（図示せず）が螺合される雄ねじ部４５を備える一方、可撓性塔状部材３の天面３４を露出する孔部４６を備えている。
　図３Ａ及び図３Ｂに示すように、本実施形態のコネクタ１では、可撓性塔状部材３は、逆Ｕ字状切欠部３１が第１～第３の直立部材２１ａ，２１ｂ，２２を跨いでその側面に密着し、第１及び第２の直立部材２１ａ，２１ｂのＵ字溝部２３ａ，２３ｂとの間に第１及び第２の流路３６ａ，３６ｂを直線状に形成する。また、可撓性塔状部材３は、第１及び第２の流路３６ａ，３６ｂの間に、仕切り部材２４を収容し、かつ、第１及び第２の流路３６ａ，３６ｂを接続する接続空間部３７を形成する。接続空間部３７は、仕切り部材２４との間に間隙を存しており、仕切り部材２４は、接続空間部３７内に、楕円錐台形状の長軸が直線状に形成された第１及び第２の流路３６ａ，３６ｂと直交するように配置される。
　このとき、空洞部３２は、接続空間部３７の上部に連通しており、仕切り部材２４との間に間隙を存して仕切り部材２４を収容するようになっている。また、混注口３５は、平面視菱形であって可撓性塔状部材３の天面３４に開口する。混注口３５は、通常は閉じていて、混注に用いられる注射筒の先端部５（図４参照）により可撓性塔状部材３が接続空間部３７方向に押圧されたときに空洞部３２に連通する。
　また、図３Ａ及び図３Ｃに示すように、カバー部材４は、可撓性塔状部材３の天面３４を露出させる一方、側面を覆ってコネクタ本体２に固定したときに、流入口４３が第１の流路３６ａに連通し、流出口４４が第２の流路３６ｂに連通するようにされている。
　図３Ａ～３Ｃに示す断面形状を備えるコネクタ１では、図示しない輸液ラインの途中に接続されたときに、該輸液ラインから流入口４３を介して流入した輸液等の液体が、図３Ａに矢示するように、第１の流路３６ａにより接続空間部３７に案内され、接続空間部３７では仕切り部材２４の第１の流路３６ａ側の側面に沿って空洞部３２に導入される。空洞部３２に導入された液体は、空洞部３２の上端で折り返し、仕切り部材２４の第２の流路３６ｂ側の側面により第２の流路３６ｂに案内され、流出口４４を介して輸液ラインに流出する。従って、コネクタ１では、空洞部３２に前記輸液等の液体を滞留させることなく、前記輸液ラインに流出させることができる。
　また、接続空間部３７に案内された液体の一部は、図３Ｃに矢示するように、仕切り部材２４の周囲を回って第２の流路３６ｂに流入する。
　輸液ラインに接続したコネクタ１を用いて混注を行うときには、図４に示すように、混注する薬液等が収容された注射筒の先端部５をカバー部材４の孔部４６に挿入し、可撓性塔状部材３の天面３４を接続空間部３７方向に押圧する。このようにすると、前述のように、混注口３５が空洞部３２に連通する。
　このとき、注射筒が、先端部５の外周側に設けられた外套筒であって内周面に雌ねじ部が形成されているロック筒（図示せず）を備えるときには、該ロック筒の雌ねじ部を小径カバー部４２の外周面に形成された雄ねじ部４５に螺合することができる。前記ロック筒の雌ねじ部を雄ねじ部４５に螺合することにより、注射筒の先端部５により可撓性塔状部材３の天面を接続空間部３７方向に押圧する動作を容易かつ確実に行うことができる。
　そして、注射筒のプランジャーをシリンダーに押し込むことにより、該注射筒に収容されている薬液等が矢示するように該注射筒の先端部５から空洞部３２に注入されて、輸液ラインに対する該薬液等の混注が行われる。
　前記混注の際には、可撓性塔状部材３が注射筒の先端部５に押圧されることにより空洞部３２が圧縮されてその内容積が低減されており、前記薬液等は空洞部３２で前記輸液等の液体と容易に混合されて、第２の流路３６ｂから流出口４４を介して輸液ラインに流出することができる。
　次に、コネクタ１の他の態様を図５Ａ及び図５Ｂに示す。図５Ａ及び図５Ｂに示す態様において、コネクタ１は、カバー部材４の大径カバー部４１が、第１及び第２の流路３６ａ，３６ｂの形成する直線の両側において可撓性塔状部材３との間に間隙４７を存している。
　コネクタ１は、カバー部材４の大径カバー部４１が可撓性塔状部材３との間に間隙４７を存することにより、図６Ａ及び図６Ｂに示すように、可撓性塔状部材３が注射筒の先端部５により接続空間部３７方向に押圧されたときに、可撓性塔状部材３の膨出する部分を間隙４７に収容することができるので、注射筒の先端部５による可撓性塔状部材３の押圧を容易に行うことができる。
　次に、コネクタ１のさらに他の態様を図７に示す。図７に示す態様において、コネクタ１は、コネクタ本体２の第３の直立部材２２の上部に、楕円錐台形状の仕切り部材２４に代えて、斜切円柱状の仕切り部材２５を備えている。仕切り部材２５は、第１の流路３６ａ側から第２の流路３６ｂ側に向けて次第に高くなる傾斜面２６を備えている。
　コネクタ１は、斜切円柱状の仕切り部材２５を備えることにより、図８に矢示するように、輸液ラインから流入口４３、第１の流路３６ａを介して接続空間部３７に流入した輸液等の液体を、仕切り部材２５の傾斜面２６に沿って流すことにより、楕円錐台形状の仕切り部材２４の場合よりも容易に空洞部３２に案内することができる。この結果、斜切円柱状の仕切り部材２５を備えるコネクタ１によれば、空洞部３２に滞留する前記液体をさらに低減することができる。
　１…コネクタ、　２…コネクタ本体、　３…可撓性塔状部材、　４…カバー部材、　５…注射筒、　２１ａ，２１ｂ，２２…直立部材、　２３ａ，２３ｂ…Ｕ字溝部、　２４，２５…仕切り部材、　３１…逆Ｕ字状切欠部、　３２…空洞部、　３３…内壁面、　３４…天面、　３５…混注口、　３６ａ，３６ｂ…流路、　３７…接続空間部、　４３…流入口、　４４…流出口。

Claims (4)

  1. 　輸液ラインの途中に接続されて該輸液ラインに対する混注に用いられるコネクタであって、
    　底部から直立し上部にＵ字溝部を備える第１及び第２の直立部材と、該第１及び第２の直立部材に挟まれて底部から直立し上部に仕切り部材を備える第３の直立部材とを備える円盤状のコネクタ本体と、
    　該第１～第３の直立部材を跨いでその側面に密着し該第１及び第２の直立部材のＵ字溝部との間に第１及び第２の流路を形成し、かつ、該第３の直立部材との間に該仕切り部材を収容し該第１及び第２の流路を接続する接続空間部を形成する逆Ｕ字状切欠部と、該接続空間部の上部に連通し該仕切り部材を収容する空洞部を形成する内壁部と、該空洞部に連通する混注口とを備える可撓性塔状部材と、
    　該可撓性塔状部材の天面を露出させる一方、側面を覆って該コネクタ本体に固定し、かつ、該第１の流路に連通し該輸液ラインから液体が流入する流入口と、該第２の流路に連通し液体が該輸液ラインに流出する流出口とを備えるカバー部材とを備えることを特徴とするコネクタ。
  2. 　請求項１記載のコネクタにおいて、前記第１及び第２の流路は直線状に位置し、前記カバー部材は該直線の両側において前記可撓性塔状部材との間に間隙を存することを特徴とするコネクタ。
  3. 　請求項１記載のコネクタにおいて、前記第１及び第２の流路は直線状に位置し、前記仕切り部材は長軸が該直線に直交する楕円錐台形状であることを特徴とするコネクタ。
  4. 　請求項１記載のコネクタにおいて、前記第１及び第２の流路は直線状に位置し、前記仕切り部材は斜切円柱状であり、該斜切円柱状の傾斜面が該第１の流路側から該第２の流路側に向けて次第に高くなることを特徴とするコネクタ。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055056A (ja) * 2006-09-01 2008-03-13 Nippon Sherwood Medical Industries Ltd 液体混注具
JP2009078101A (ja) * 2007-09-27 2009-04-16 Nippon Sherwood Medical Industries Ltd 液体混注具
WO2015087982A1 (ja) * 2013-12-11 2015-06-18 日機装株式会社 混注部材
JP2016147077A (ja) * 2016-03-16 2016-08-18 テルモ株式会社 コネクタ

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JP6006220B2 (ja) * 2011-09-27 2016-10-12 テルモ株式会社 コネクタ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055056A (ja) * 2006-09-01 2008-03-13 Nippon Sherwood Medical Industries Ltd 液体混注具
JP2009078101A (ja) * 2007-09-27 2009-04-16 Nippon Sherwood Medical Industries Ltd 液体混注具
WO2015087982A1 (ja) * 2013-12-11 2015-06-18 日機装株式会社 混注部材
JP2016147077A (ja) * 2016-03-16 2016-08-18 テルモ株式会社 コネクタ

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