KR20030065450A - Catheter needle hub preventing blood leak and backflow - Google Patents

Catheter needle hub preventing blood leak and backflow Download PDF

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Publication number
KR20030065450A
KR20030065450A KR1020030049901A KR20030049901A KR20030065450A KR 20030065450 A KR20030065450 A KR 20030065450A KR 1020030049901 A KR1020030049901 A KR 1020030049901A KR 20030049901 A KR20030049901 A KR 20030049901A KR 20030065450 A KR20030065450 A KR 20030065450A
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blood
needle
backflow
fluid
control valve
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KR1020030049901A
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Korean (ko)
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KR100521834B1 (en
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두재균
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두재균
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3293—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle hub

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

Abstract

PURPOSE: Provided is a backflow cutoff needle hub for an intravenous set which has the structure to prevent the leakage of blood when connecting the intravenous set and to cutoff the backflow occurred when the infusion pressure is suddenly lowered in infusion. CONSTITUTION: The backflow cutoff needle hub is applied to the blood transfusion needle(100) of biodegradable material instead of using a metal guide needle. An infusion solution channel(13) is formed in the main body(10), a part(12) for inserting the blood transfusion needle is formed in one side, a part for inserting tube is formed in another side, a backflow control valve(20) is bonded to the infusion channel. When the blood transfusion needle of biodegradable material enters the blood vessel with the needle bonded to the needle inserting part, the blood leakage is blocked by the backflow control valve and after connecting the intravenous set(110), the blood backflow is prevented.

Description

수액세트용 혈액누출 및 역류방지 니들허브 { Catheter needle hub preventing blood leak and backflow}Catheter needle hub preventing blood leak and backflow}

본 발명은 수액주사시에 사용하는 수액세트의 니들 허브에 관한 것으로, 상세히는 니들허브 내부에 역류제어 밸브를 설치하여 혈액 주사과정중 혈액의 누출과 역류를 방지하기 위한 것이다.The present invention relates to a needle hub of an infusion set used for infusion injection, and more particularly, to prevent the leakage and backflow of blood during the blood injection process by installing a backflow control valve inside the needle hub.

수액세트는 정맥주사시에 사용되는데 종래 일반적인 형태의 수액세트는 약제용기에 결합되는 챔버와, 조절장치, 카뉼라에 결합되는 허브 챔버와 허브를 연결하기 위한 튜브로 이루어져 있다.A fluid set is used for intravenous injection. A conventional fluid set includes a chamber coupled to a pharmaceutical container, a regulator, a hub chamber coupled to a cannula, and a tube for connecting the hub.

또한, 수액세트에 의한 수액주입은 카뉼라를 혈관속에 삽입하고, 캬뉼라의 허브를 수액세트와 연결하는 방법에 의해 이루어진다.Infusion by infusion set is also accomplished by inserting the cannula into the vessel and connecting the cannula's hub to the infusion set.

통상의 캬뉼라는 혈관의 보호를 위해 유연한 재질을 사용하며, 혈관 진입을 용이하게 하기 위해 금속제 가이드바늘과 한 단위로 구성하여 사용하게 된다.Conventional cannula uses a flexible material for the protection of blood vessels, and is used in one unit with a metal guide needle to facilitate the entry of blood vessels.

가이드바늘과 카뉼라를 한 단위로 구성한 경우 가이드바늘은 피부를 뚫고 들어가 캬뉼라의 혈관진입을 안내하는 역할을 수행한 후 캬뉼라로부터 분리하여 폐기되며, 카뉼라는 혈관에 진입된 상태에서 머리에 수액셋트를 연결함으로서 수액을 혈관내에 공급하는 작용을 한다.When the guide needle and the cannula are configured as a unit, the guide needle penetrates the skin and guides the cannula's vascular ingress and is then separated from the cannula and discarded. By connecting the set is to supply fluid into the blood vessels.

상기한 방법은 구혈대나 지압을 통하여 혈관 진입과정에서의 혈액 분출을 막기 위한 노력 하에서 이루어지나 수액세트의 연결과정에서 혈액의 누출 등이 필연적으로 발생케 된다.The above method is made in an effort to prevent blood ejection in the blood vessel entry process through a blood vessel or acupressure, but leakage of blood inevitably occurs in the process of connecting a fluid set.

한편, 금속제 가이드바늘 사용에 따르는 불편과 안전 및 위생상의 상의 문제점 때문에 혈관 천자시(진입시)에는 충분한 강도로 피부를 뚫고 들어가고, 혈액속의 체온이나 효소의 작용에 의해 바늘의 날카로움이 감소되고 연화가 이루어져 유연한 형태의 카테타로 작용함으로서 금속제 바늘을 사용하지 않고서도 혈관주사가 가능하도록 한 생분해성 혈관주사용 바늘이 제시(대한민국특허출원제2002-0064615)된 바 있으며, 이것은 날카로움이 유지되고 있는 상태의 바늘 끝 부분을 혈관 안으로 밀어 넣고, 그 후 연화에 의해 일반 카뉼라와 같이 유연해지는 작용에 의해 기존의 금속제 가이드 바늘을 사용할 필요가 없는 장점을 가지나 이 또한 기존의 수액세트 시스템을 사용할 경우 수액세트의 연결과정에서 혈액의 누출 등이 필연적으로 발생게 된다.On the other hand, due to the inconvenience caused by the use of metal guide needles and problems of safety and hygiene, when penetrating the blood vessel (at the time of entry), it penetrates the skin with sufficient strength, and the sharpness of the needle is reduced and softened by the body temperature or the action of enzyme in the blood. A biodegradable angioplasty needle has been proposed (Korean Patent Application No. 2002-0064615), which acts as a flexible catheter and allows for angioplasty without the use of a metal needle, which is a sharp needle. The tip is pushed into the blood vessel, and then softened and then softened like a regular cannula, eliminating the need to use conventional metal guide needles. Blood leaks inevitably occur during the process.

본 발명은 금속제 가이드 바늘을 사용하지 않는 생분해성 소재로 이루어진 혈관주사용 바늘에 적용하여 수액세트연결도중 혈액의 누출을 차단하고, 수액공급과정에서 주입압력이 갑자기 낮아 질 때 발생하는 혈액의 역류를 방지할 수 있는 구조의 수액세트용 역류방지 니들허브를 제시한다.The present invention is applied to a blood injection needle made of a biodegradable material that does not use a metal guide needle to block the leakage of blood during fluid set connection, and to prevent the back flow of blood generated when the injection pressure suddenly decreases during the fluid supply process. We present a non-return needle hub for an infusion set that can be prevented.

도1은 본 발명의 구성도1 is a block diagram of the present invention

도2는 도1의 A-A부 상세구조도2 is a detailed structural diagram of A-A part of FIG.

*주요부호의 설명* Description of the major symbols

본 발명은 금속제 가이드 바늘을 사용하지 않는 생분해성 소재로 이루어진 혈관주사용 바늘에 적용되는 니들허브로서, 본체 내부에는 수액통로가 형성되고 일측에 혈관주사용 바늘 삽입부가 형성되며, 다른 일측 내부에는 튜브삽입부가 형성되고, 수액통로상에는 역류제어밸브가 결합되는 구조로 이루어져 생분해성 소재로 이루어진 혈관주사용 바늘을 바늘 삽입부에 결합한 상태로 혈관진입시 내부의 역류제어밸브에 의해 혈액의 유출이 차단되고, 수액세트 결합 후에는 혈액의 역류가 방지되도록 한 구성을 갖는다.The present invention is a needle hub that is applied to a needle for injection of blood vessels made of a biodegradable material that does not use a metal guide needle, a fluid passage is formed inside the body and a needle for injection of blood vessels is formed on one side, and the tube inside the other side. The insertion part is formed, and the flow control valve is coupled on the fluid passage, and the blood flow is blocked by the internal flow control valve inside the blood vessel when the blood vessel injection needle made of biodegradable material is coupled to the needle insertion part. After combining the fluid set, the constitution has a configuration to prevent backflow of blood.

상기한 본 발명은 혈관주사용 바늘에 결합된 상태에서 구혈대나 혈관의 압박이 없더라도 혈액의 누출을 자동으로 차단하고, 수액주사시 환자의 움직임, 수액의 종료 등에 의해 주입압이 낮아지더라도 혈액의 유출 및 역류가 자동으로 차단될 수 있도록 한 구성에 특징이 있다.The present invention described above automatically blocks blood leakage even when there is no compression of blood vessels or blood vessels in the state coupled to the needle for injection of blood vessels, and blood flows out even if the injection pressure decreases due to the movement of the patient or the end of the fluid during infusion. And a configuration such that backflow can be automatically shut off.

상기에서 본체는 혈관 주사용 바늘(캬뉼라와 동일한 의미로 사용)을 꽂아 혈관에 집입을 쉽게 할 수 있도록 손으로 잡을 수 있는 부분으로서 원통형 또는 각형등 다양한 형태로 외형을 구성할 수 있다.The main body can be configured in various forms, such as cylindrical or angular, as a portion that can be held by a hand so that the blood vessel can be easily inserted into a blood vessel by inserting a needle (used in the same sense as a cannula).

본체의 하부에 형성된 혈관주사용 바늘 삽입부는 생분해성 혈관주사용 바늘의 허브를 꽂아 사용할 수 있도록 된 부분으로 본체의 하단으로부터 약간 돌출된 형태의 원통형으로 구성된다.The intravenous needle insertion unit formed at the lower part of the main body is a portion that can be used by inserting the hub of the biodegradable intravenous intravenous needle and has a cylindrical shape that protrudes slightly from the lower end of the main body.

본체 내에 형성된 수액통로는 수액세트의 결합시 튜브를 통하여 전달된 수액을 혈관주사용 바늘에 전달하기 위한 통로로서 본체의 선단에서 하부까지 연속된다.The fluid passage formed in the main body is a passage for delivering the fluid delivered through the tube to the needle for infusion when the fluid set is combined, and continues from the tip to the bottom of the main body.

튜브삽입부는 수액세트를 구성하는 튜브를 결합하기 위한 부분으로 튜브의 선단을 억지로 끼워 맞춤 할 수 있도록 테이퍼진 형태로 구성된다.The tube insertion part is a part for joining the tubes constituting the infusion set, and is configured in a tapered form so as to forcibly fit the tip of the tube.

역류제어밸브는 혈액의 압력이 작용할 때는 닫혀지고, 수액의 압력이 작용할 때는 열리도록 구성된 일 방향 제어밸브의 형태로 구성되며, 다양한 방식으로 구성할 수 있으나 접촉면의 증대를 통하여 완벽한 차단기능을 발휘할 수 있도록 원추형태의 접촉면을 형성한 구조가 바람직하다.The backflow control valve is configured in the form of a one-way control valve configured to close when the blood pressure is applied and open when the fluid pressure is applied, and can be configured in various ways, but it can exhibit a complete blocking function by increasing the contact surface. It is preferable that the conical contact surface is formed so that it is.

이하 첨부된 도면에 의한 실시례에 의해 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도1 및 도2는 본 발명의 구조를 도시하기 위한 것으로, 본 발명은 원통형의 본체(10)를 사용하고, 원추형의 역류제어밸브(20)와, 이를 고정하기 위한 고정링(30)을 사용한 실시형태를 보인 것이다.1 and 2 are for showing the structure of the present invention, the present invention uses a cylindrical body 10, using a conical backflow control valve 20, and using a fixing ring 30 for fixing it An embodiment is shown.

실시례에 따르면, 본체(10)는 원통형으로 구성하고, 상단부에 걸림턱(11)을 형성하여 혈관주사용 바늘(100)을 분리하거나 수액세트(110)의 분리 결합을 용이하게 할 수 있도록 구성한다.According to the embodiment, the main body 10 is configured in a cylindrical shape, to form a locking jaw (11) at the upper end to separate the vascular injection needle 100 or to facilitate the separation coupling of the infusion set (110) do.

본체의 하단부에는 약간의 테이퍼를 갖는 혈관주사용 바늘 삽입부(12)를 형성하고, 내부에는 상부에서 하부까지 연속된 수액통로(13)를 형성하였다.At the lower end of the main body, a needle injection portion 12 for injection of blood vessels having a slight taper was formed, and an infusion passage 13 continuous from the top to the bottom was formed therein.

수액통로는 상부로부터 하부까지 4단계(13a)(13b)(13c)(13d)로 구분하여 상부의 첫 번째 단(12a)의 내경이 가장 크고, 두 번째 단(13b), 세 번째 단(13c)으로 갈수록 점차로 작아 지도록 구성한 후 가장 하부의 단(13d)는 세 번째 단보다 약간 크게 구성하여 역류제어밸브(20)를 간편하게 설치할 수 있도록 구성하였다.The fluid passage is divided into four steps (13a) (13b) (13c) (13d) from the top to the bottom, and the inner diameter of the first stage (12a) at the top is the largest, the second stage (13b), and the third stage (13c). The lower stage (13d) is configured to be slightly larger than the third stage after the configuration to gradually become smaller) was configured to easily install the backflow control valve (20).

상기한 첫 번째 단(12a)은 역류제어밸브의 고정을 위한 고정링(30)을 삽입하고, 고정링 안쪽으로 튜브결합부(31)를 형성하며, 고정링의 하단부에는 역 원추형태의 역류제어밸브 접촉면(32)을 형성한다.The first stage 12a inserts a fixing ring 30 for fixing the backflow control valve, forms a tube coupling part 31 inside the fixing ring, and has a reverse cone shaped reverse flow control at the lower end of the fixing ring. The valve contact surface 32 is formed.

3번째 단은 원추형태의 단으로 구성하여 고정링과 3번째 단 사이의 2번째 단에 역류제어밸브를 삽입할 수 있는 공실(14)이 형성될 수 있게 한다.The third stage is configured as a cone-shaped stage so that the vacancy 14 into which the counter flow control valve can be inserted is formed at the second stage between the fixed ring and the third stage.

역류제어밸브(20)는 원주상의 상부에 원추형태의 접촉면(21)이 형성되고, 하부에 틈이 형성된 역 원추형 접촉면(22)이 형성된 구조로 한다.The reverse flow control valve 20 has a conical contact surface 21 formed on a circumferential upper portion, and a reverse conical contact surface 22 having a gap formed on a lower portion thereof.

상기한 구조의 역류제어밸브는 고정링에 형성된 접촉면(32)과 3번째 단에 형성한 접촉면 사이에 대략 4-5mm 정도의 유격을 가지고 압력의 방향에 따라 공실내에서 유동할 수 있는 상태로 결합된다.The counter flow control valve of the above structure has a clearance of about 4-5 mm between the contact surface 32 formed on the fixed ring and the contact surface formed on the third stage, and is coupled in a state capable of flowing in the vacancy along the direction of pressure. do.

따라서, 혈액의 압력이 작용하는 경우( 즉, 혈관주사용 바늘의 혈관내 주입시와 수액용기를 낮추어 혈액압이 수액압보다 강해진 경우)에는 상승하여 고정링의 접촉면과 역류제어밸브의 접촉면이 밀착 접촉됨으로서 혈액의 외부 유출 또는 역류가 방지되고, 혈관에 혈관주사용 바늘(100)을 꽂고 수액세트(110)를 결합한 상태에서 수액을 높여 주면 수액의 압력이 혈압보다 높아져 역류제어밸브가 하강하여 하부의 접촉면과 3번째 단의 접촉면이 접촉하며, 이때는 접촉면에 형성된 틈새를 통하여 수액이 차단되지 않고 흘러들어 가게 된다.Therefore, when blood pressure is applied (i.e., when intravenous injection of the needle is lowered and the fluid container is lowered to make the blood pressure stronger than the fluid pressure), the contact surface of the fixed ring and the contact surface of the backflow control valve come into close contact with each other. The contact prevents the outflow or reverse flow of blood, and the blood pressure is higher than the blood pressure by increasing the fluid in the state in which the vascular injection needle 100 is inserted into the blood vessel, and the fluid set 110 is coupled, so that the backflow control valve descends to lower the blood pressure. The contact surface of and the contact surface of the third stage is in contact, in which case the sap flows through the gap formed in the contact surface without blocking.

이상의 구성에 의한 본 발명은 일반 캬뉼라와 달리 금속제 가이드 바늘이 필요 없는 생분해성 소재를 이용한 혈관주사용 바늘을 사용하여 상기 바늘과 본 발명에 의한 니들허브를 결합한 상태에서 혈관에 진입시키면 혈압이 역류제어밸브를 밀어 올려 수액통로를 자동으로 차단시켜줌으로서 구혈대등을 사용하거나 지압을 하지 않더라도 혈액의 외부 유출이 근본적으로 방지된다.The present invention by the above configuration, unlike the general cannula using a blood vessel injection needle using a biodegradable material that does not require a metal guide needle when entering the blood vessel in the state in which the needle and needle hub according to the present invention combined blood pressure backflow By pushing the control valve, the fluid passage is automatically shut off, which prevents the outflow of blood.

수액세트를 고정링의 결합부에 결합한 상태로 혈관주입이 가능하고, 분리된 상태에서 혈관 진입을 시행한 후 수액세트를 결합할 수 있으며, 수액세트의 결합과정에서 완벽한 혈액의 차단이 이루어짐으로서 위생적이고, 간편해진다.Vessel injection is possible with the infusion set coupled to the coupling part of the fixed ring, and the infusion set can be combined after the entry of blood vessels in the separated state, and the blood is completely blocked in the infusion process. And simple.

이상의 구성에 의한 본 발명은 혈관주사시 필연적으로 야기되는 혈액의 누출문제를 완벽하게 제한 할 수 있고, 수액 투여중 부주의에 의해 필요 높이 보다 낮아지거나 수액의 소진 상태에서 혈압이 작용할 때 역류제어밸브가 자동으로 혈액의 역류를 차단시켜 줌으로서 위생적이고, 안전성이 향상된다.The present invention by the above configuration can completely limit the problem of leakage of blood inevitably caused during blood vessel injection, and when the blood pressure acts when the blood pressure is lowered than the required height by inadvertent administration during the administration of fluid or the fluid is exhausted, Hygiene and safety are improved by automatically blocking the back flow of blood.

Claims (2)

금속제 가이드 바늘을 사용하지 않는 생분해성 소재로 이루어진 혈관주사용 바늘에 적용되는 니들허브로서, 본체 내부에는 수액통로가 형성되고 일측에 혈관주사용 바늘 삽입부가 형성되며, 다른 일측 내부에는 튜브삽입부가 형성되고, 수액통로상에는 역류제어밸브가 결합되는 구조로 이루어져 생분해성 소재로 이루어진 혈관주사용 바늘을 바늘 삽입부에 결합한 상태로 혈관진입시 내부의 역류제어밸브에 의해 혈액의 유출이 차단되고, 수액세트 결합 후에는 혈액의 역류가 방지되도록 한 구성을 특징으로 하는 수액세트용 혈액누출 및 역류방지 니들허브.Needle hub applied to an injection needle made of a biodegradable material that does not use a metal guide needle. A fluid passage is formed inside the body, and an injection needle insertion part is formed on one side, and a tube insertion part is formed inside the other side. On the infusion passage, the flow control valve is coupled to the structure, and the vascular injection needle made of a biodegradable material is coupled to the needle insertion part, and the outflow of the blood is blocked by the internal flow control valve at the time of entering the blood vessel, and the infusion set is combined. After the blood leakage and reflux prevention needle hub for the fluid set, characterized in that the configuration to prevent the back flow of blood. 제1항에 있어서, 역류제어밸브는 원주상의 상부에 원추형태의 접촉면이 형성되고, 하부에 틈이 형성된 역 원추형 접촉면이 형성되는 구조로 하여 혈압의 작용시 수액통로 상에 형성한 역 원추형 접촉면에 상부 접촉면이 밀착 접촉됨으로서 수액통로가 차단되고, 수액의 압력이 작용시 하부의 상부접촉면은 열리고 하부의 틈을 통하여 수액의 흐름이 이루어 지도록 구성한 것을 특징으로 하는 수액세트용 혈액누출 및 역류방지 니들허브.The reverse flow control valve of claim 1, wherein the reverse flow control valve has a conical contact surface formed on the upper portion of the circumference, and a reverse conical contact surface formed with a gap on the lower portion thereof. The fluid contact block is blocked by the upper contact surface being in close contact with the fluid, and when the pressure of the fluid is applied, the upper contact surface of the lower part is opened and the fluid flows through the gap in the lower part. Herb.
KR10-2003-0049901A 2003-07-21 2003-07-21 Catheter needle hub preventing blood leak and backflow KR100521834B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145561A3 (en) * 2019-01-07 2020-11-12 김성기 Branch adapter for infusion set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145561A3 (en) * 2019-01-07 2020-11-12 김성기 Branch adapter for infusion set
CN113573753A (en) * 2019-01-07 2021-10-29 金圣起 Multi-way connecting component of infusion device
CN113573753B (en) * 2019-01-07 2023-06-27 金圣起 Multi-way connecting assembly of transfusion device

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