WO2015081802A1 - 一种无针加药输液正压接头 - Google Patents

一种无针加药输液正压接头 Download PDF

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Publication number
WO2015081802A1
WO2015081802A1 PCT/CN2014/092274 CN2014092274W WO2015081802A1 WO 2015081802 A1 WO2015081802 A1 WO 2015081802A1 CN 2014092274 W CN2014092274 W CN 2014092274W WO 2015081802 A1 WO2015081802 A1 WO 2015081802A1
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Prior art keywords
positive pressure
hollow
vertical section
hollow rubber
rubber plug
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PCT/CN2014/092274
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English (en)
French (fr)
Inventor
梁栋科
林森
李涛
朱小叶
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上海康德莱企业发展集团医疗器械有限公司
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Publication of WO2015081802A1 publication Critical patent/WO2015081802A1/zh

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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
    • A61M39/22—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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/20—Closure caps or plugs for connectors or open ends of tubes

Definitions

  • the invention relates to a needleless medicinal infusion positive pressure joint in the field of medical instruments.
  • the needle-free dosing positive pressure connector is mainly used for medical injection, gravity infusion, liquid extraction, and can be connected with intravenous infusion devices, intravenous catheters, etc.
  • needle-free infusion positive pressure connector can avoid needle puncture Contamination of particles and micro-particles caused by human capillaries.
  • the needle-free dosing positive pressure connector produces a positive pressure, which automatically pushes the liquid in the IV infusion device, venous catheter, etc., to prevent blood from flowing back and avoid thrombosis.
  • the main problem of the current needle-free dosing positive pressure connector is that when the injection device is removed, the positive pressure provided by the needle-free dosing positive pressure connector is insufficient, resulting in a large amount of drug residue remaining in the needle-free dosing positive pressure connector. Inside, it causes a lot of waste of the liquid medicine, and can affect the accuracy of the dosage, and delay the treatment of the patient. At the same time, there is a metal structure inside the needle-free dosing positive pressure connector, which will affect the accuracy of the test results when performing nuclear magnetic resonance examination.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a needle-free medicinal infusion positive pressure joint, which can provide a larger positive pressure when the injection device is removed, and reduce the liquid medicine in the needle-free medicinal infusion.
  • the residual amount in the pressure joint reduces the waste of the liquid medicine and ensures the accuracy of the dosage.
  • a technical solution for achieving the above object is: a needle-free dosing positive pressure joint comprising a casing, the casing being divided into vertical sections, and in the middle of the vertical section, being connected to the vertical section Horizontal section
  • a hollow rubber plug is disposed in the vertical section, a semi-rigid rubber plug inner core is inserted and fixed on an upper portion of the hollow rubber plug, and a middle layer of the hollow rubber plug is provided with a partition layer supporting the inner core of the rubber plug a sealing structure is formed between an outer wall of the top of the hollow rubber plug and an inner wall of the upper portion of the vertical section; the hollow rubber plug partitions the vertical section from the horizontal section, and the bottom of the hollow rubber plug is The bottom of the vertical section is secured by a hollow gasket located within the outer casing.
  • the hollow gasket includes a gasket body fixedly inserted into a bottom of the inner wall of the hollow rubber plug, and a gasket flange at a bottom of the gasket body, and a top surface of the gasket flange
  • the bottom surface of the hollow rubber plug is fixed, the side surface of the gasket flange abuts against the inner wall of the vertical section, and the bottom of the vertical section is provided with a radially inwardly protruding supporting member for supporting the gasket flange The bottom surface.
  • gasket flange is provided with a pressure relief gap.
  • a middle portion of the hollow rubber plug is provided with a rubber plug flange on an outer wall of the hollow rubber plug, the rubber plug flange abuts against an inner wall of the vertical section, and the vertical section is The horizontal section is cut off.
  • the rubber plug inner core includes an inner core body fixedly inserted and fixed to the inner wall of the hollow rubber plug, and an inner core flange located at the top of the inner core body, the bottom surface of the inner core flange and the bottom The top surface of the hollow rubber plug is fixed.
  • the center of the top surface of the rubber core is provided with a liquid inlet.
  • a screw cap is sleeved on the outer wall of the upper portion of the vertical segment.
  • a screw is sleeved on the outer wall of the horizontal section, and the inner screw cap is sleeved between the screw and the radial direction of the horizontal section.
  • outer casing and the hollow gasket are both transparent.
  • the outer casing and the hollow gasket are both made of medical polycarbonate, the rubber core is made of medical polyacetal, and the hollow rubber stopper is made of medical silica gel.
  • a needle-free dosing positive pressure joint of the invention that is, a hollow rubber plug is arranged in a vertical section of the outer casing, and a semi-rigid rubber plug inner core is inserted and fixed on the upper part of the hollow rubber plug, hollow
  • the middle part of the rubber plug is provided with a partition supporting the inner core of the rubber plug, and a sealing structure is formed between the outer wall of the top of the hollow rubber plug and the inner wall of the upper part of the vertical section, and the hollow rubber plug will cover the vertical section of the outer shell and the water of the outer casing
  • the flat section is partitioned between the bottom of the hollow rubber plug and the bottom of the vertical section of the outer casing by a hollow gasket located inside the outer casing.
  • Figure 1 is a right side elevational view of a needleless dosing infusion positive pressure connector of the present invention.
  • Figure 2 is a cross-sectional view of the needle-free dosing positive pressure connector of the present invention taken along the line A-A.
  • FIG 3 is a top plan view of a hollow gasket in a needleless medicinal infusion positive pressure joint of the present invention.
  • Figure 4 is a cross-sectional view of the needle-free dosing positive pressure connector of the present invention in the infusion state, taken along the line A-A.
  • a needle-free dosing positive pressure joint of the present invention comprises a casing 1 having a structure of a tee, that is, the casing 1 is divided into vertical sections 11 which are open at both ends, and The middle portion of the vertical section 1 is a horizontal section 12 that is in contact with the vertical section 11. The radial center of the horizontal section 12 forms a liquid outlet 121 through which the liquid medicine flows out of the needle-free dosing positive pressure connection.
  • a hollow rubber plug 2 is arranged in the vertical section 11.
  • the upper part of the hollow rubber plug 2 is inserted and fixed with a semi-rigid rubber plug inner core 3, and the rigidity of the rubber core 3 must be greater than the rigidity of the hollow rubber plug 2.
  • the middle portion of the hollow rubber stopper 2 is provided with a partition 21 inside the hollow rubber stopper 2 for supporting the inner core 3 of the rubber stopper.
  • the upper portion of the hollow rubber stopper 2 corresponds to a semi-rigid structure and is substantially not deformed after being subjected to a force.
  • the upper portion of the vertical section 11, that is, the vertical section 11, is higher than the horizontal section 12, and the lower portion of the vertical section 11, that is, the vertical section 11, is lower than the horizontal section 12.
  • the needle-free dosing positive pressure joint can withstand certain human blood pressure without leakage; in order to separate the space inside the positive pressure joint of the needle-free dosing and the external space, thereby preventing the pollution of outside air and bacteria;
  • the pressing force for extruding the liquid medicine into the horizontal section 12 is provided, and in order to generate sufficient positive pressure in the positive pressure joint of the needle-free dosing in the injection device 7, the top of the hollow rubber stopper 2 Outer wall A sealing structure must be formed between the inner walls of the upper portion of the vertical section 11.
  • the top of the hollow rubber plug 2 is provided with an upper flange 23 on the outer wall of the hollow rubber plug 2 with an axial length of 0.5 to 1 mm, and the upper flange 23 abuts against the inner wall of the upper portion of the vertical section 11, thereby A sealing structure is formed between the outer wall of the top of the hollow rubber stopper 2 and the inner wall of the upper portion of the vertical section 11.
  • the sealing structure formed between the outer wall of the upper portion of the hollow rubber plug 2 and the inner wall of the upper portion of the vertical section 11 is not limited to the manner in which the upper flange 23 is provided, and the axial length of the upper flange 23 is not limited to 0.5 to 1 mm.
  • the outer wall of the hollow rubber plug 2 blocks the vertical section 11 from the horizontal section 12, so that a sealing structure is also formed between the hollow rubber plug 2 and the horizontal section 12.
  • a gap is left between the outer wall of the lower portion of the hollow rubber stopper 2 and the inner wall of the lower portion of the vertical section 11. The effect of this gap is to provide sufficient space for the high elastic compression deformation of the lower portion of the hollow rubber plug 2 when the injection device 7 is inserted from the top of the vertical section 11.
  • the bottom of the hollow rubber stopper 2 is provided with a hollow gasket 4 located inside the outer casing 1.
  • the bottom of the vertical section 11 is fixed to the bottom of the hollow rubber stopper 2.
  • the injection device 7 After the conical interface 71 of the injection device 7 is inserted into the needle-free dosing positive pressure connector from the top of the vertical section 11, the injection device 7 applies a force to the rubber core 3, and the rubber core 3 transmits the force to the hollow rubber stopper. 2 on.
  • the hollow rubber stopper 2 and the rubber stopper inner core 3 are entirely moved downward, and the upper portion of the hollow rubber stopper 2, that is, the portion above the barrier layer 21, is substantially not deformed.
  • the lower portion of the hollow rubber stopper 2, that is, the portion below the barrier layer 21, undergoes high elastic compression deformation, which acts as a spring.
  • the vertical section 11 communicates with the horizontal section 12.
  • the liquid medicine overflows from the liquid inlet port 33 on the top surface of the rubber stopper inner core 3, and follows the three uniformly distributed overflow grooves on the inner wall of the vertical section 11 (not shown in Figs. 2 and 4), filling the upper portion of the hollow rubber stopper 2
  • the outer wall is in the gap between the inner wall of the vertical section 11.
  • the drug solution flows out along the horizontal section 12 out of the needle-free dosing positive pressure connector.
  • the needle-free dosing positive pressure connector is in the injection state.
  • the injection device 7 When the injection device 7 is removed, the high elastic compression deformation of the lower portion of the hollow rubber stopper 2 is restored, and the outer wall of the hollow rubber stopper 2 re-separates between the vertical section 11 and the horizontal section 12.
  • the needle-free dosing infusion positive pressure joint produces a sufficiently large positive
  • the amount of pressure automatically advances the drug solution along the horizontal section 12 to prevent blood from flowing back into the horizontal section 12 to avoid the formation of a thrombus.
  • the needle-free infusion positive pressure connector can provide a sufficient positive pressure to prevent blood from flowing back into the horizontal section 12, avoiding the formation of a thrombus, and reducing the liquid medicine in the needle-free dosing.
  • the residual amount in the positive pressure connector of the infusion reduces the waste of the liquid and ensures the accuracy of the dosage.
  • the hollow gasket 4 includes a gasket body 41 that is inserted and fixed to the bottom inner wall of the hollow rubber stopper 2, and a gasket flange 42 at the bottom of the gasket body 41.
  • the top surface and the hollow surface of the gasket flange 42 are hollow.
  • the bottom surface of the rubber stopper 2 is fixed, the side surface of the gasket flange 42 is closely attached to the inner wall of the vertical section 11, and a sealing structure is formed.
  • the bottom of the vertical section 11 is provided with a support member 111 protruding radially inwardly, and the support gasket flange 42 is provided. The bottom surface facilitates the positioning of the hollow gasket 4 within the outer casing 1.
  • the purpose of this design is to increase the contact area between the hollow gasket 4 and the bottom of the vertical section 11, disperse the force, and prevent the vertical section 11 from cracking during use.
  • the hollow gasket 4, that is, the radial center of the hollow gasket 4 is provided with a through hole 43 which functions to reduce the resistance of the lower portion of the hollow rubber stopper 2 in the high elastic compression deformation.
  • the gasket flange 42 of the hollow gasket 4 is provided with a pressure relief notch 421 on the radial edge of the gasket flange 42.
  • the middle portion of the hollow rubber plug 2 is provided with a rubber plug flange 22 on the outer wall of the hollow rubber plug 2.
  • the purpose of the rubber plug flange 22 is to connect the human body with the needle-free medicine infusion positive pressure joint.
  • the rubber plug flange 22 and the inner wall of the vertical section 11 form a seal structure, so that the needle-free dosing positive pressure joint can withstand a certain human blood pressure without leaking; at the same time, prevent the outside air and bacteria from entering. Pollution.
  • the rubber core 3 includes an inner core body 31 that is fixedly coupled to the inner wall of the hollow rubber plug 2, and an inner core flange 32 at the top of the inner core body 31.
  • the bottom surface and the inner core flange 32 are in the middle and the middle.
  • the top surface of the empty rubber stopper 2 is fixed.
  • the purpose of the design is to ensure that the upper portion of the hollow rubber plug 2 does not undergo high elastic compression deformation, and at the same time, the outer wall of the upper portion of the hollow rubber plug 2 and the inner wall of the vertical portion 11 are ensured when the needle-free dosing positive pressure joint is in the infusion state.
  • a gap can be formed between the two sides, so that the liquid can smoothly flow through the horizontal section 12 out of the needle-free dosing positive pressure joint.
  • the center of the top surface of the rubber core 3 is provided with a liquid inlet 33, and the liquid medicine in the injection device 7 passes through the liquid inlet 33 and overflows from the three overflow tanks evenly distributed on the inner wall of the vertical section 11.
  • the needle-free medicinal infusion positive pressure joint is discharged along the horizontal section 12.
  • the outer wall of the horizontal section 12 is sleeved with a screw 61, and the inner screw cap 62 is sleeved between the screw 61 and the radial direction of the horizontal section 12 for protecting the liquid outlet 121 from the outside air. Dust and bacteria contamination.
  • the outer wall of the upper portion of the vertical section 11 is sleeved with a screw cap 5 which is fixed by an external thread 112 on the outer wall of the top of the vertical section 11.
  • the function of the screw cap 5 is as a protective cap for the inlet end of the needle-free dosing positive pressure connector, which prevents the hollow rubber plug 2 at the liquid inlet end and the top surface of the rubber core 3 from being exposed to the outside air. The possibility of dust and bacteria contamination, which is currently not available in other needle-free dosing positive pressure connectors.
  • Another function of the external thread 112 is to fix the injection device 7 after the conical interface 71 of the injection device 7 is inserted into the top of the vertical section 11, as shown in FIG.
  • the outer casing 1 and the hollow gasket 4 are made of transparent plastic, and the high elastic compression deformation of the hollow rubber stopper 2 of the needle-free dosing positive pressure joint is visible, and the liquid medicine is in the needle-free dosing positive pressure joint. The flow is also visible. Whether the needle-free infusion connector is completely rinsed by the drug solution or whether the blood flow returns is visible, which is superior to the prior art.
  • the hollow rubber stopper 2 is made of medical silica gel.
  • the rubber core 3 and the hollow gasket 4 are more rigid than the hollow rubber plug 2, so the material of the rubber core 3 is preferably medical polyoxymethylene, which is opaque, hollow gasket 4, outer casing 1, screw 61
  • the material is preferably medical polycarbonate and is transparent.
  • the material of the inner screw cap 62 is preferably medical polypropylene, and the material of the screw cap 5 is preferably medical polyethylene, which is opaque.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
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Abstract

一种无针加药输液正压接头，包括外壳（1），外壳（1）分为垂直段（11），以及在垂直段（11）中部，与垂直段（11）相接的水平段（12）。垂直段（11）内设有中空胶塞（2），中空胶塞（2）的上部插接固定有一个半刚性的胶塞内芯（3），中空胶塞（2）的中部设有支撑胶塞内芯（3）的隔层（21）。中空胶塞（2）顶部的外壁与垂直段（11）上部的内壁之间形成密封结构。中空胶塞（2）将垂直段（11）与水平段（12）隔断，中空胶塞（2）的底部与垂直段（11）的底部之间通过位于外壳（1）内的中空垫片（4）固定。在注射器械拔除时，该接头能提供足够的正压量，防止人体血液回流，减少药液在接头内的残留量，保证用药剂量的准确性。

Description

一种无针加药输液正压接头 技术领域
本发明涉及医疗器械领域的一种无针加药输液正压接头。
背景技术
无针加药输液正压接头主要用于医疗中注射药液、重力输液、液体抽取，可与静脉输液器，静脉导管等注射器械连接，无针加药输液正压接头可以避免由于针头穿刺可能对人体毛细血管带来的微粒、微屑的污染。当注射器械拔除时，无针加药输液正压接头产生一个正压，自动使静脉输液器，静脉导管等内的液体向前推进，可防止血液回流，避免形成血栓。目前的无针加药输液正压接头存在的主要问题是：注射器械拔除时，无针加药输液正压接头提供的正压量不足，造成大量药液残留在无针加药输液正压接头内，引起了大量药液的浪费，并可影响用药剂量的准确性，耽误病人的治疗。同时，无针加药输液正压接头内部还存在金属结构，其在进行核磁共振检查时将影响检查结果的准确性。
发明内容
本发明的目的是为了克服现有技术的不足，提供一种无针加药输液正压接头，其在注射器械拔除时能提供更大的正压量，减少药液在无针加药输液正压接头内的残留量，减少药液的浪费，保证用药剂量的准确性。
实现上述目的的一种技术方案是：一种无针加药输液正压接头，包括外壳，所述外壳分为垂直段，以及在所述垂直段中部，与所述垂直段相接 的水平段；
所述垂直段内设有中空胶塞，所述中空胶塞的上部插接固定有一个半刚性的胶塞内芯，所述中空胶塞的中部设有支撑所述胶塞内芯的隔层，所述中空胶塞顶部的外壁与所述垂直段上部的内壁之间形成密封结构；所述中空胶塞将所述垂直段与所述水平段隔断，所述中空胶塞的底部与所述垂直段的底部之间通过位于所述外壳内的中空垫片固定。
进一步的，所述中空垫片包括与所述中空胶塞内壁底部插接固定的垫片本体，以及位于所述垫片本体底部的垫片凸缘，所述垫片凸缘的顶面与所述中空胶塞的底面固定，所述垫片凸缘的侧面紧贴所述垂直段的内壁，所述垂直段的底部设有径向向内凸出的支撑部件，支撑所述垫片凸缘的底面。
再进一步的，所述垫片凸缘上设有减压缺口。
再进一步的，所述中空胶塞的中部设有位于所述中空胶塞外壁上的胶塞凸缘，所述胶塞凸缘紧贴所述垂直段的内壁，并将所述垂直段与所述水平段隔断。
进一步的，所述胶塞内芯包括与所述中空胶塞内壁插接固定的内芯本体以及与位于所述内芯本体顶部的内芯凸缘，所述内芯凸缘的底面与所述中空胶塞的顶面固定。
再进一步的，所述胶塞内芯的顶面的中心设有进液口。
进一步的，所述垂直段上部的外壁上套接有旋紧盖。
进一步的，所述水平段的外壁上套接有螺口，所述螺口与所述水平段的径向之间套接内螺护帽。
进一步的，所述外壳和所述中空垫片均是透明的。
再进一步的，所述外壳和所述中空垫片均由医用聚碳酸酯制成，所述胶塞内芯由医用聚甲醛制成，所述中空胶塞由医用硅胶制成。
采用了本发明的一种无针加药输液正压接头的技术方案，即在外壳的垂直段内设置中空胶塞，中空胶塞的上部插接固定有一个半刚性的胶塞内芯，中空胶塞的中部设有支撑胶塞内芯的隔层，中空胶塞顶部的外壁与垂直段上部的内壁之间形成密封结构，中空胶塞将外壳的垂直段与外壳的水 平段隔断，中空胶塞的底部与外壳的垂直段的底部之间通过一个位于外壳内的中空垫片固定的技术方案。其技术效果是：在注射器械拔除时，其能提供足够的正压量，防止人体血液的返流，减少药液在无针加药输液正压接头内的残留量，减少药液的浪费，保证用药剂量的准确性。
附图说明
图1为本发明的一种无针加药输液正压接头的右视图。
图2为本发明的一种无针加药输液正压接头的A-A面剖视图。
图3为本发明的一种无针加药输液正压接头中的中空垫片的俯视图。
图4为本发明的一种无针加药输液正压接头在输液状态下的A-A面剖视图。
具体实施方式
请参阅图1至图4，本发明的发明人为了能更好地对本发明的技术方案进行理解，下面通过具体地实施例，并结合附图进行详细地说明：
请参阅图1至图4，本发明的一种无针加药输液正压接头，包括外壳1，外壳1具有三通管的结构，即外壳1分为两端开口的垂直段11，以及在垂直段1的中部，与垂直段11相接的水平段12。水平段12的径向中心形成药液流出无针加药输液正压接头的出液口121。
垂直段11内设有一个中空胶塞2，中空胶塞2的上部插接固定有一个半刚性的胶塞内芯3，胶塞内芯3的刚度必须大于中空胶塞2的刚度。中空胶塞2的中部，设有位于中空胶塞2内部，用于支撑胶塞内芯3的隔层21。中空胶塞2的上部相当于具有半刚性结构，在受力后基本不变形。
同时，垂直段11上部即垂直段11中高于水平段12部分，垂直段11下部即垂直段11中低于水平段12部分。为了使无针加药输液正压接头能够承受一定的人体血液压力而不泄漏；为了将无针加药输液正压接头内的空间与外部空间隔断，从而防止外界空气和细菌的污染；为了能在输液过程中，提供将药液挤出水平段12的挤压力，还为了在注射器械7拔除时，使无针加药输液正压接头内产生足够的正压量，中空胶塞2顶部的外壁与 垂直段11上部的内壁之间必须形成密封结构。
本实施例中，中空胶塞2的顶部，设有位于中空胶塞2外壁上的，轴向长度为0.5～1mm的上凸缘23，上凸缘23紧贴垂直段11上部的内壁，从而使中空胶塞2顶部的外壁与垂直段11上部的内壁之间形成了密封结构。必须说明的是，中空胶塞2上部的外壁与垂直段11上部的内壁之间形成密封结构并不局限于设置上凸缘23这一种方式，上凸缘23的轴向长度也不局限于0.5～1mm。
同时，中空胶塞2的外壁将垂直段11与水平段12隔断，使中空胶塞2与水平段12之间也形成密封结构。
中空胶塞2下部的外壁与垂直段11下部的内壁之间留有间隙。该间隙的作用在于：在注射器械7从垂直段11的顶部插入时，为中空胶塞2下部的高弹压缩形变提供足够空间。
中空胶塞2的底部设有一个位于外壳1内的中空垫片4。将垂直段11的底部与中空胶塞2的底部固定。
注射器械7的圆锥接口71从垂直段11的顶部插入无针加药输液正压接头后，注射器械7将力作用于胶塞内芯3上，胶塞内芯3将力传导到中空胶塞2上。中空胶塞2和胶塞内芯3整体下移，中空胶塞2的上部，即隔层21以上的部分，基本不变形。中空胶塞2的下部，即隔层21以下的部分，发生高弹压缩形变，相当于起到了一个弹簧的作用。
随着中空胶塞2的下部，发生高弹性压缩形变，中空胶塞2的上部的外壁与垂直段11的内壁之间形成的间隙用于存储药液。同时，垂直段11与水平段12之间连通。药液从胶塞内芯3顶面上的进液口33溢出，顺着垂直段11内壁上的三条均匀分布的溢流槽(图2和图4中未显示)，充满中空胶塞2上部的外壁与垂直段11内壁之间的间隙中。接着，药液沿着水平段12流出无针加药输液正压接头。无针加药输液正压接头处于注射状态。
当拔除注射器械7后，中空胶塞2的下部的高弹压缩形变复原，中空胶塞2的外壁将垂直段11与水平段12之间重新隔断。该过程中，由于中空胶塞2高弹压缩形变复原，无针加药输液正压接头内产生一个足够大正 压量，自动使药液沿着水平段12向前推进，防止血液回流进入水平段12，避免形成血栓。
通过上述的设计，在注射器械7拔除时，无针加药输液正压接头能提供足够大的正压量，防止血液回流进入水平段12，避免形成血栓，并减少药液在无针加药输液正压接头内的残留量，减少药液的浪费，保证用药剂量的准确性。
本实施例中，中空垫片4包括与中空胶塞2底部内壁插接固定的垫片本体41，以及位于垫片本体41底部的垫片凸缘42，垫片凸缘42的顶面与中空胶塞2的底面固定，垫片凸缘42的侧面紧贴垂直段11的内壁，形成密封结构，垂直段11的底部设有径向向内凸出的支撑部件111，支撑垫片凸缘42的底面，从而便于中空垫片4在外壳1内的定位。这样设计的目的在于增加中空垫片4与垂直段11底部的接触面积，分散受力，防止垂直段11在使用过程中开裂。中空垫片4，即中空垫片4的径向中心设有贯通孔43，其作用在于：减少中空胶塞2下部在高弹压缩形变中受到的阻力。
为了进一步减少中空胶塞2下部在高弹压缩形变中受到的阻力，中空垫片4的垫片凸缘42上设有一个位于垫片凸缘42径向边缘上的减压缺口421。在中空胶塞2的下部发生高弹压缩形变时，位于中空胶塞2下部的外壁与垂直段11下部的内壁之间的间隙中的空气可通过减压缺口421排出。中空胶塞2的下部完成高弹压缩形变后，中空胶塞2下部的外壁与垂直段11下部的内壁之间形成密封结构，因而药液不会从垂直段11底部滴漏。
本实施例中，中空胶塞2的中部设有位于中空胶塞2外壁上的胶塞凸缘22，胶塞凸缘22的目的在于：在无针加药输液正压接头与人体相连而未注射变形时，胶塞凸缘22与垂直段11的内壁形成密封件结构，使无针加药输液正压接头能够承受一定的人体血液压力而不泄漏；同时，防止外界空气和细菌进入而造成污染。
本实施例中，胶塞内芯3包括与中空胶塞2内壁插接固定的内芯本体31以及与位于内芯本体31顶部的内芯凸缘32，内芯凸缘32的底面与中 空胶塞2的顶面固定。这样设计的目的在于：保证中空胶塞2的上部不发生高弹压缩形变，同时保证在无针加药输液正压接头处于输液状态下时，中空胶塞2上部的外壁与垂直段11的内壁之间能形成间隙，使药液能够顺利通过水平段12流出无针加药输液正压接头。
同时，胶塞内芯3的顶面的中心设有进液口33，注射器械7里的药液正是通过进液口33，再从在垂直段11内壁上均匀分布的三条溢流槽溢出，充满中空胶塞2上部的外壁与垂直段11内壁之间的间隙中，沿着水平段12流出无针加药输液正压接头。
本实施例中，水平段12的外壁上套接有螺口61，螺口61与水平段12的径向之间套接内螺护帽62，用于保护出液口121不受外界空气中灰尘和细菌的污染。
同时，垂直段11上部的外壁上套接有旋紧盖5，旋紧盖5通过位于垂直段11顶部外壁上的外螺纹112固定。旋紧盖5的作用在于：作为无针加药输液正压接头进液端的保护帽，很好地防止了进液端的中空胶塞2，以及胶塞内芯3顶面暴露在外，被外界空气中灰尘和细菌的污染的可能，这是目前其它无针加药输液正压接头所没有的。外螺纹112的另外一个作用在于：在注射器械7的圆锥接口71插入垂直段11的顶部后，将注射器械7固定，如图4所示。
外壳1和中空垫片4由透明塑料制成，无针加药输液正压接头的中空胶塞2的高弹压缩形变都是可视的，药液在无针加药输液正压接头内的流动也是可视的，无针加药输液接头内是否被药液完全冲洗，或者是否发生血液的回流也都是可视的，优于现有技术的同类产品。
同时，为了实现中空胶塞2的高弹压缩形变，中空胶塞2是由医用硅胶制成的。胶塞内芯3和中空垫片4的刚度要大于中空胶塞2的刚度，因此胶塞内芯3的材料优选医用聚甲醛，是不透明的，中空垫片4、外壳1，螺口61的材料优选医用聚碳酸酯，是透明的。内螺护帽62的材料优选医用聚丙烯，旋紧盖5的材料优选医用聚乙烯，都是不透明的。本实施例中无针加药输液正压接头内部无金属部件保证了输液病人进行核磁共振检查的正确结果。

Claims (10)

  1. 一种无针加药输液正压接头，包括外壳(1)，所述外壳(1)分为垂直段(11)，以及在所述垂直段(11)中部，与所述垂直段(11)相接的水平段(12)；其特征在于：
    所述垂直段(11)内设有中空胶塞(2)，所述中空胶塞(2)的上部插接固定有一个半刚性的胶塞内芯(3)，所述中空胶塞(2)的中部设有支撑所述胶塞内芯(3)的隔层(21)，所述中空胶塞(2)顶部的外壁与所述垂直段(11)上部的内壁之间形成密封结构；所述中空胶塞(2)将所述垂直段(11)与所述水平段(12)隔断，所述中空胶塞(2)的底部与所述垂直段(11)的底部之间通过位于所述外壳(1)内的中空垫片(4)固定。
  2. 根据权利要求1所述的一种无针加药输液正压接头，其特征在于：所述中空垫片(4)包括与所述中空胶塞(2)内壁底部插接固定的垫片本体(41)，以及位于所述垫片本体(41)底部的垫片凸缘(42)，所述垫片凸缘(42)的顶面与所述中空胶塞(2)的底面固定，所述垫片凸缘(42)的侧面紧贴所述垂直段(11)的内壁，所述垂直段(11)的底部设有径向向内凸出的支撑部件(111)，支撑所述垫片凸缘(42)的底面。
  3. 根据权利要求2所述的一种无针加药输液正压接头，其特征在于：所述垫片凸缘(42)上设有减压缺口(421)。
  4. 根据权利要求2所述的一种无针加药输液正压接头，其特征在于：所述中空胶塞(2)的中部设有位于所述中空胶塞(2)外壁上的胶塞凸缘(22)，所述胶塞凸缘(22)紧贴所述垂直段(11)的内壁，并将所述垂直段(11)与所述水平段(12)隔断。
  5. 根据权利要求1至4中任意一项所述的一种无针加药输液正压接头，其特征在于：所述胶塞内芯(3)包括与所述中空胶塞(2)内壁插接固定的内芯本体(31)以及与位于所述内芯本体(31)顶部的内芯凸缘(32)，所述内芯凸缘(32)的底面与所述中空胶塞(2)的顶面固定。
  6. 根据权利要求5所述的一种无针加药输液正压接头，其特征在于：所述胶塞内芯(3)的顶面的中心设有进液口(33)。
  7. 根据权利要求1至4中任意一项所述的一种无针加药输液正压接头，其特征在于：所述垂直段(11)上部的外壁上套接有旋紧盖(5)。
  8. 根据权利要求1至4中任意一项所述的一种无针加药输液正压接头，其特征在于：所述水平段(12)的外壁上套接有螺口(61)，所述螺口(61)与所述水平段(12)的径向之间套接内螺护帽(62)。
  9. 根据权利要求1至4中任意一项所述的一种无针加药输液正压接头，其特征在于：所述外壳(1)和所述中空垫片(4)均是透明的。
  10. 根据权利要求9中所述的一种无针加药输液正压接头，其特征在于：所述外壳(1)和所述中空垫片(4)均由医用聚碳酸酯制成，所述胶塞内芯(3)由医用聚甲醛制成，所述中空胶塞(2)由医用硅胶制成。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106730119A (zh) * 2017-02-17 2017-05-31 河南曙光汇知康生物科技股份有限公司 一种输液用无针接头
CN108236759A (zh) * 2018-01-17 2018-07-03 威海洁瑞医用制品有限公司 医用输液正向流动接头装置
CN109999264A (zh) * 2019-04-26 2019-07-12 台州安融医疗器械有限公司 医用单向正压三叉

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103599577A (zh) * 2013-12-03 2014-02-26 上海康德莱企业发展集团医疗器械有限公司 一种无针加药输液正压接头
CN106110493A (zh) * 2016-07-25 2016-11-16 江苏华安吉泰医疗器械有限公司 无针正压接头

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6883778B1 (en) * 1996-11-18 2005-04-26 Nypro Inc. Apparatus for reducing fluid drawback through a medical valve
CN201061640Y (zh) * 2007-08-08 2008-05-21 孙东 无针密闭输液接头
CN201091713Y (zh) * 2007-08-17 2008-07-30 朱锡才 输液接头
CN103599577A (zh) * 2013-12-03 2014-02-26 上海康德莱企业发展集团医疗器械有限公司 一种无针加药输液正压接头
CN203677628U (zh) * 2013-12-03 2014-07-02 上海康德莱企业发展集团医疗器械有限公司 一种无针加药输液正压接头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6245048B1 (en) * 1996-12-16 2001-06-12 Icu Medical, Inc. Medical valve with positive flow characteristics
CN1172727C (zh) * 1996-12-16 2004-10-27 Icu医学有限公司 正向流动阀
US6029946A (en) * 1997-09-15 2000-02-29 Tiva Medical Inc. Needleless valve
CN201414998Y (zh) * 2009-05-31 2010-03-03 广东龙心医疗器械有限公司 无针正压加药输液接头
CN101879339B (zh) * 2010-07-12 2011-10-12 上海康德莱企业发展集团医疗器械有限公司 一种无针加药正压接头
CN201840715U (zh) * 2010-07-12 2011-05-25 上海康德莱企业发展集团医疗器械有限公司 一种无针加药正压接头

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6883778B1 (en) * 1996-11-18 2005-04-26 Nypro Inc. Apparatus for reducing fluid drawback through a medical valve
CN201061640Y (zh) * 2007-08-08 2008-05-21 孙东 无针密闭输液接头
CN201091713Y (zh) * 2007-08-17 2008-07-30 朱锡才 输液接头
CN103599577A (zh) * 2013-12-03 2014-02-26 上海康德莱企业发展集团医疗器械有限公司 一种无针加药输液正压接头
CN203677628U (zh) * 2013-12-03 2014-07-02 上海康德莱企业发展集团医疗器械有限公司 一种无针加药输液正压接头

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106730119A (zh) * 2017-02-17 2017-05-31 河南曙光汇知康生物科技股份有限公司 一种输液用无针接头
CN108236759A (zh) * 2018-01-17 2018-07-03 威海洁瑞医用制品有限公司 医用输液正向流动接头装置
CN109999264A (zh) * 2019-04-26 2019-07-12 台州安融医疗器械有限公司 医用单向正压三叉
CN109999264B (zh) * 2019-04-26 2023-11-03 台州安融医疗器械有限公司 医用单向正压三叉

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