WO2016086832A1 - 一种带缓释正压的留置针 - Google Patents

一种带缓释正压的留置针 Download PDF

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Publication number
WO2016086832A1
WO2016086832A1 PCT/CN2015/096110 CN2015096110W WO2016086832A1 WO 2016086832 A1 WO2016086832 A1 WO 2016086832A1 CN 2015096110 W CN2015096110 W CN 2015096110W WO 2016086832 A1 WO2016086832 A1 WO 2016086832A1
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positive pressure
catheter
indwelling needle
sustained release
joint
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PCT/CN2015/096110
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English (en)
French (fr)
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邹卫平
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邹卫平
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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
    • 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
    • A61M5/1582—Double lumen needles
    • 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
    • A61M2206/00—Characteristics of a physical parameter; associated device therefor
    • A61M2206/10—Flow characteristics

Definitions

  • the present invention relates to a disposable medical device, and more particularly to an indwelling needle with a sustained release positive pressure.
  • the single-use intravenous indwelling needle used clinically in the clinical units of various medical institutions in China needs to be sealed after the infusion to avoid tube plugging due to the formation of blood clotting in the tube, but in practice, it is often caused by patient movement and blood.
  • the infiltration causes the blood to enter the tube, and if the blood is not flushed before the infusion of the next day, or the formed clot is flushed into the blood vessel, the blood vessel which is blocked by the blood during the circulation is formed into an embolism.
  • the patient brings great harm and even life-threatening.
  • anticoagulant drugs such as heparin sodium are injected into the patient to prevent blood coagulation
  • anticoagulant drugs such as heparin sodium
  • the tube time is limited, and it needs to be sealed several times.
  • the improper operation of the nurse can easily cause the tube blocking phenomenon.
  • the object of the present invention is to provide an indwelling needle with a sustained release positive pressure, which can provide a certain volume of liquid medicine and a continuous pressure source, and can stably release the chemical solution slowly, prevent clot formation in the indwelling tube, and avoid blocking the tube.
  • the phenomenon occurs, prolonging the service life of the indwelling needle, thereby avoiding secondary damage caused by the formed blood clot rushing into the patient's blood circulation system.
  • an indwelling needle assembly a double lumen catheter, a catheter clamp, a Y-type positive pressure connector and a reservoir
  • the indwelling needle assembly including a needle sheath, a catheter assembly and a needle assembly
  • a catheter clamp The sleeve is sleeved into the slot of the catheter clip, and the two ends of the double lumen catheter are respectively firmly connected with the Y-type oblique interface of the catheter assembly of the indwelling needle assembly and the lower end of the Y-type positive pressure connector joint base.
  • the liquid reservoir is screwed onto the oblique interface of the Y-type positive pressure joint, and the double-cavity catheter is a large and small double-lumen catheter, the large cavity is a conventional infusion channel, and the small cavity is a micro-aperture.
  • the positive pressure joint and the reservoir form a pressure after the release of the hydraulic pressure, which is a slow liquid permeation passage of the liquid medicine.
  • the reservoir with the sustained release positive pressure indwelling needle is a spring-loaded syringe in the rear inner cavity thereof. After the syringe is sucked, the spring is compressed, the syringe plunger is released, and the spring releases the pressure to form the indwelling needle. Pressure device.
  • the double lumen catheter with the sustained release positive pressure indwelling needle has a small cavity diameter of between 0.001 mm and 0.1 mm.
  • the Y-type positive pressure joint with the sustained-release positive pressure indwelling needle is composed of a Y-shaped outer casing with two interposed luer connectors, a silicon capsule, a spring and a joint base, and may also be a three-way connecting seat and a single positive
  • the pressure connector replaces the Y-type positive pressure connector
  • the single positive pressure connector is composed of a straight jacket with an interpolated Luer connector, a silicon capsule, a spring and a joint base, a Y-type positive pressure joint and a single positive pressure connection.
  • the spring in the head is also not available.
  • the spring in the syringe with the sustained release positive pressure indwelling needle can also be replaced by an elastic reservoir or a reservoir or an elastomer.
  • the outer surface of the double-lumen catheter with the sustained-release positive pressure indwelling needle can be added with a light-proof layer, the jacket of the catheter seat, the Y-shaped or straight positive pressure joint, the joint base and the tee joint, and the reservoir
  • the syringe casing is made of a material that is protected from light, or a layer of light is added to the outside.
  • the indwelling needle with slow release positive pressure of the invention has little difference from the use of the indwelling needle on the existing market, and the function is completely different.
  • the operation is as follows: the infusion needle of the infusion set is pulled out of the sheath and the insertion is slowed down.
  • the puncture device of the heparin cap for releasing the needle of the positive pressure device is inserted into the vial of the infusion set, so that the infusion set and the sustained release positive pressure device of the present invention are filled with the liquid, and the indwelling needle is removed.
  • Sheath close the infusion set regulator, follow the indwelling needle puncture operation procedure for wound disinfection, venipuncture, return to the needle assembly after returning blood, needle insertion, needle assembly, fixation, etc., infusion, during infusion
  • slowly pull the core rod to pump the liquid into the syringe casing, to the position of the core rod slot, and rotate the core rod at an angle so that the four bars of the core rod are offset from the slot of the cover, and the spring is compressed.
  • the core rod is stuck on the cover; when the infusion is nearing the end, the catheter clamp is closed, the infusion set end joint is separated from the positive pressure joint, a positive pressure is formed in the positive pressure joint, and then the four bars of the core rod are restored to the protection Compression bomb in the slot That is, the liquid medicine in the outer cylinder of the syringe is squeezed to form another positive pressure, so that the present invention simultaneously has two positive pressures simultaneously pressing the liquid medicine, and the squeezed liquid medicine in the tube of the present invention
  • the micropores along the double lumen catheter flow to the indwelling catheter, and the inflow of the indwelling catheter is also formed to be larger than the venous pressure of the human body and infiltrated into the vein, so that the invention keeps the liquid medicine infiltrating into the vein of the patient, due to the release of the positive pressure joint.
  • the volume of the drug solution is limited, and the release time is limited.
  • the release time of the present invention can be greatly prolonged, thereby more effectively preventing blood from coagulating in the indwelling catheter, thereby preventing the tube from being blocked and preventing thrombus formation. To prevent secondary injuries, this will also save the nurses from 6-8 hours/time of sealing and flushing, reducing their workload.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • Embodiment 2 is a schematic structural view of Embodiment 2 of the present invention.
  • the first embodiment comprises an indwelling needle assembly, a double lumen catheter (3), a catheter clamp (4), a Y positive pressure connector (5) and a reservoir (6), and the indwelling needle
  • the assembly comprises a needle sheath (7), a catheter assembly (1) and a needle assembly (2), the catheter clamp (4) is sleeved on the double lumen catheter (3), and the small lumen (31) surface of the catheter is snapped into the catheter clamp (4)
  • the two ends of the double-lumen conduit (3) are respectively firmly connected with the conduit assembly (1) Y-type oblique interface of the indwelling needle assembly and the lower end interface of the Y-type positive pressure joint joint base (54), and are stored.
  • the liquid device (6) is screwed onto the oblique interface of the Y-type positive pressure joint, and is characterized in that the double-lumen catheter (3) is a large and small double-lumen catheter, and the large chamber (31) is a conventional infusion channel.
  • the small cavity (32) is a micro-aperture.
  • the reservoir (6) with the sustained release positive pressure indwelling needle is a syringe with a spring (64) in the rear inner cavity thereof, and the spring (64) is compressed by the syringe after the liquid medicine is sucked to release the syringe core rod ( 62), the spring (64) releases the pressure so that the indwelling needle forms a positive pressure device.
  • the double lumen catheter (3) with the sustained release positive pressure indwelling needle has a small cavity (32) with a pore diameter of 0.001 mm to 0.1 mm.
  • the spring (54) in the syringe with the sustained release positive pressure indwelling needle can also be replaced by an elastic reservoir or a reservoir or an elastomer.
  • the catheter clip with the sustained release positive pressure indwelling needle in the middle of the lower convex portion of the upper and lower clamping portions thereof, opens a card slot (41) matching the outer diameter of the outer wall of the small hole along the direction of the catheter .
  • the outer surface of the double-lumen catheter (3) with the sustained-release positive pressure indwelling needle can be added with a light-proof layer, the jacket of the catheter seat, the Y-shaped or straight positive pressure joint, the joint base and the tee joint (9)
  • the syringe casing (61) of the liquid receiver (6) is made of a material that can be protected from light, or a light-shielding layer is additionally provided to form a light-shielded indwelling needle with a sustained release positive pressure. Used in conjunction with a light-shielding infusion set.
  • the indwelling needle with the sustained release positive pressure device of the first embodiment has little change with the use of the ordinary indwelling needle, and the operation is to first screw the infusion set end joint with the positive pressure joint (5) of the first embodiment, and infusion. Insert the needle of the device into the mouth of the vial, and after the infusion set and the indwelling needle with the sustained release positive pressure of the present invention are filled with the liquid medicine, close the infusion set adjuster, remove the indwelling needle sheath (7), and press the indwelling needle. Puncture operation procedure for wound disinfection, venipuncture, blood return, needle assembly (2), needle insertion, needle assembly (2), fixation, etc., at any point during the infusion process.
  • the volume of the drug released by the positive pressure connector is usually limited, and the delay time is limited.
  • the release time of the present invention is greatly prolonged, thereby preventing blood from coagulation and solidification in the indwelling catheter. In addition, it can avoid blocking the tube to prevent the occurrence of blood clots.
  • Embodiment 2 differs from Embodiment 1 in that a straight positive pressure joint (8) and a three-way conduit seat (9) replace the Y-type positive pressure joint (5), and the operation is completely the same as in Embodiment 1. same.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种带缓释正压的留置针，包括留置针组件、双腔导管（3）、导管夹（4）、Y型正压接头（5）和贮液器（6），留置针组件包括针护套（7）、导管组件（1）和针组件（2），导管夹（4）套于双腔导管（3）上，双腔导管（3）的两端分别与留置针组件的导管组件（1）的Y型斜接口和Y型正压接头（5）的接头底座（54）的下端接口牢固连接，贮液器（6）旋接于Y型正压接头（5）的斜接口上，其特征在于：双腔导管（3）为一大一小的双腔导管，其大腔（31）为常规输液用通道，小腔（32）是一微小孔径，留置时在大腔（31）导管被导管夹（4）夹闭后，其正压接头（5）和贮液器（6）经释放后的液压形成压力，药液从小腔（32）缓慢流出渗入血管，阻止血栓形成。该留置针使用寿命长，可免于封管所耗器械，减少了医疗费用。

Description

一种带缓释正压的留置针 技术领域
本发明涉及一次性使用医疗器械，尤其是涉及一种带缓释正压的留置针。
背景技术
国内各医疗机构临床单位临床使用的一次性使用静脉留置针，在输液结束后匀需进行封管操作，以免因管内形成凝血造成堵管现象，但在实际应用过程中，往往因患者运动和血液的渗透而造成血液进入置管内，在进行第二天的输液前如未能冲管，或将已形成的凝血块冲入血管内，极易引起血液在循环过程中堵塞的血管形成栓塞，给患者带来极大的伤害甚至威胁生命，虽有为了防止血液凝固给患者注入肝素钠等防凝血药物，可有对肝素钠等防凝血药物过敏患者，也有用生理盐水进行封管，但其封管时间有限，需多次进行封管，另外，护士操作不当也极易造成堵管现象，现市场上有如正压接头装置，还有管内放置细纤维引流等等技术，其也只能是当时有正压，或者是因夹子夹得过紧，压力过小，药液释放不过来，没几分钟后药液就流不出来了，还是易形成堵管，如何能解决管内凝血防止血块产生是当前面临解决的难题。
发明内容
本发明的目的在于提供一种带带缓释正压的留置针，能提供一定体积的药液、持续的压力源，同时能稳定的缓慢释放药液，防止留置管内形成凝血块，避免堵管现象出现，延长留置针的使用寿命，从而也能避免因形成的血块冲入病人的血液循环系统中造成二次伤害。
为实现上述目的，本发明采用如下技术方案：包括留置针组件、双腔导管、导管夹、Y型正压接头和贮液器，留置针组件包括针护套、导管组件和针组件，导管夹套于双腔导管上，导管的小腔面卡入导管夹的卡槽内，双腔导管的两端分别与留置针组件的导管组件Y型斜接口和Y型正压接头接头底座下端接口牢固连接，贮液器旋接于Y型正压接头的斜接口上，其特征在于：双腔导管为一大一小的双腔导管，其大腔为常规输液用通道，小腔是一微小孔径，留置时在大腔导管被导管夹夹闭后，其正压接头和贮液器经释放后的液压形成压力，为药液缓慢渗液通道。
所述带缓释正压的留置针的贮液器为其后部内腔带有弹簧的注射器，注射器在抽吸药液后弹簧被压缩，释放注射器芯杆，弹簧即释放压力使留置针形成正压装置。
所述带缓释正压的留置针的双腔导管，其小腔孔径在0.001mm～0.1mm间。
所述带缓释正压的留置针的Y型正压接头，由带两内插式鲁尔接头的Y型外套、硅胶囊、弹簧和接头底座组成，也可以由三通连接座和单正压接头替代Y型正压接头，单正压接头由带1内插式鲁尔接头的直型外套、硅胶囊、弹簧和接头底座组成，Y型正压接头和单正压接 头中的弹簧也可不配备。
所述带缓释正压的留置针的注射器中的弹簧,也可是弹性贮液囊或是贮气囊或是弹性体代替。
所述带缓释正压的留置针的导管夹，在其中间上、下夹合部的下凸起中部，顺着导管方向开一与小孔外壁的外径相匹配的卡槽。
所述带缓释正压的留置针的双腔导管的外表可增加一层避光层，导管座、Y型或直型正压接头的外套、接头底座和三通连接座、贮液器的注射器外套采用能避光的材料制成，或也采用在外增一层避光层。
本发明的带缓释正压的留置针，与现有市场上的留置针使用上区别不大，功能却完全不同，操作如下：将输液器配的输液针拔去其护套后插入带缓释正压装置留置针的肝素帽的穿刺器件上，将输液器器插瓶针插入药瓶口上，使输液器及本发明的带缓释正压装置留置针充满药液后，拔去留置针护套，关闭输液器调节器，按留置针穿刺术操作流程进行创面消毒、静脉穿刺见回血后回抽针组件、进针、拔出针组件、固定等操作后进行输液，在输液过程中的任一时间点上，慢慢抽拉芯杆抽吸药液至注射器外套内，至芯杆卡槽位置，旋转芯杆一角度使芯杆的四条筋偏离护盖槽缝后，弹簧被压缩，芯杆被卡在护盖上；当输液临近结束时，关闭导管夹，将输液器末端接头与正压接头分离，正压接头内形成一股正压，之后将芯杆的四条筋恢复至护盖槽缝中，压缩弹簧的即被释放，注射器外筒内的药液被挤压，形成另一股正压，这样就使本发明同时拥有两股正压同时挤压药液，本发明管内的被挤压的药液沿着双腔导管的微孔流至留置导管，流至留置导管的同时也形成有大于人体静脉压而渗入静脉，使本发明一直保持着有药液渗入病人静脉血管，由于正压接头释放的药液体积有限，释放的时间有限，增加贮液器释放的药液后，就能大大延长本发明的释放时间，从而能更有效地防止血液在留置导管凝聚，进而能避免堵管防止血栓形成，防止二次伤害，这样还能免除护士每隔6-8小时/次的封管、冲管，减轻其工作量。
附图说明
图1为本发明实施例1的结构示意图；
图2为本发明实施例2的结构示意图；
附图标记：
1-导管组件，2-针组件，3-双腔导管，4-导管夹，5-Y型正压接头，6-贮液器，7-针护套，8-直型正压接头，9-三通座，31-大腔，32-小腔，41-卡槽，51-Y型外套，52-硅胶囊，53-弹簧，54-接头底座，61-注射器外套，62-芯杆，63-活塞，64-弹簧，65-护盖。
具体实施方式
下面结合实施例并对照附图对本发明作进一步详细说明。
实施例1
如图1和图2所示，本实施例1由留置针组件、双腔导管(3)、导管夹(4)、Y型正压接头(5)和贮液器(6)组成，留置针组件包括针护套(7)、导管组件(1)和针组件(2)，导管夹(4)套于双腔导管(3)上，导管的小腔(31)面卡入导管夹(4)的卡槽(41)内，双腔导管(3)的两端分别与留置针组件的导管组件(1)Y型斜接口和Y型正压接头接头底座(54)下端接口牢固连接，贮液器(6)旋接于Y型正压接头的斜接口上，其特征在于：双腔导管(3)为一大一小的双腔导管，其大腔(31)为常规输液用通道，小腔(32)是一微小孔径，留置时在大腔(31)导管被导管夹(4)夹闭后，其正压接头(5)和贮液器(6)经释放后的液压形成压力，为药液缓慢渗液通道。
所述带缓释正压的留置针的贮液器(6)为其后部内腔带有弹簧(64)的注射器，注射器在抽吸药液后弹簧(64)被压缩，释放注射器芯杆(62)，弹簧(64)即释放压力使留置针形成正压装置。
所述带缓释正压的留置针的双腔导管(3)，其小腔(32)孔径在0.001mm～0.1mm间。
所述带缓释正压的留置针的Y型正压接头(5)，由带两内插式鲁尔接头的Y型外套(51)、硅胶囊(52)、弹簧(53)和接头底座(54)组成，也可以由三通连接座(9)和单正压接头(8)替代Y型正压接头(5)，单正压接头(8)由带1内插式鲁尔接头的直型外套、硅胶囊、弹簧和接头底座组成，Y型正压接头(5)和单正压接头(8)中的弹簧也可不配备。
所述带缓释正压的留置针的注射器中的弹簧(54),也可是弹性贮液囊或是贮气囊或是弹性体代替。
所述带缓释正压的留置针的导管夹，在其中间上、下夹合部的下凸起中部，顺着导管方向开一与小孔外壁的外径相匹配的卡槽(41)。
所述带缓释正压的留置针的双腔导管(3)的外表可增加一层避光层，导管座、Y型或直型正压接头的外套、接头底座和三通连接座(9)、贮液器(6)的注射器外套(61)采用能避光的材料制成，或也采用在外增一层避光层,制成避光型的带带缓释正压的留置针，与避光输液器配套使用。
本实施例1的带缓释正压装置留置针，与普通留置针使用变化不大，其操作是先将输液器末端接头与实施例1上的正压接头(5)旋接，并将输液器器插瓶针插入药瓶口上，使输液器及本发明的带缓释正压的留置针充满药液后，关闭输液器调节器，拔去留置针针护套(7)，按留置针穿刺术操作流程进行创面消毒、静脉穿刺见回血后回抽针组件(2)、进针、拔出针组件(2)、固定等操作后进行输液，在输液过程中的任一时间点上，慢慢抽拉芯杆(62)抽吸药液至注射器外套(61)内，至芯杆(62)卡位槽位置，旋转芯杆(62)一角度使芯杆(62)的四条筋偏离护盖槽缝后，弹簧(64)被压缩，芯杆(62)被卡在护盖(65)上；当 输液临近结束时，关闭止水夹子(6)，将输液器末端接头与正压接头(5)分离，正压接头(5)内形成一股正压，之后将芯杆(62)的四条筋恢复至护盖槽缝中，压缩的弹簧(64)即被释放，注射器外筒(61)内的药液被胶塞(63)挤压，形成另一股正压，这样就使本发明同时拥有两股正压同时挤压药液，本发明管内的被挤压的药液沿着双腔导管(3)的小腔(32)微孔流至留置导管，同时也能形成大于人体静脉压而渗入静脉，通常使用的正压接头释放的药液体积有限，延缓的时间有限，增加贮液器释放的药液后，就大大延长本发明的释放时间，从而能防止血液在留置导管凝聚凝固，进而能避免堵管防止血栓的产生。
实施例2
如图2所示,实施例2与实施例1不同之处在于直型正压接头(8)和三通导管座(9)取代Y型正压接头(5)，其操作与实施例1完全一样。
以上所述实施例1和实施例2仅是本发明的优先实施方式。应当指出，对于本领域技术人员，在不脱离本发明原理的前提下，其各配件还可作出若干变型、改进及配件的增减，这也应视为属于本发明的保护范围。

Claims (7)

  1. 一种带缓释正压的留置针，包括留置针组件、双腔导管、导管夹、Y型正压接头和贮液器，留置针组件包括针护套、导管组件和针组件，导管夹套于双腔导管上，导管的小腔面卡入导管夹的卡槽内，双腔导管的两端分别与留置针组件的导管组件Y型斜接口和Y型正压接头接头底座下端接口牢固连接，贮液器旋接于Y型正压接头的斜接口上，其特征在于：双腔导管为一大一小的双腔导管，其大腔为常规输液用通道，小腔是一微小孔径，留置时在大腔导管被导管夹夹闭后，其正压接头和贮液器经释放后的液压形成压力，为药液缓慢渗液通道。
  2. 如权利要求1所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的贮液器为其后部内腔带有弹簧的注射器，注射器在抽吸药液后弹簧被压缩，释放注射器芯杆，弹簧即释放压力使留置针形成正压装置。
  3. 如权利要求1所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的双腔导管，其小腔孔径在0.001mm～0.1mm间。
  4. 如权利要求1所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的Y型正压接头，由带两内插式鲁尔接头的Y型外套、硅胶囊、弹簧和接头底座组成，也可以由三通连接座和单正压接头替代Y型正压接头，单正压接头由带1内插式鲁尔接头的直型外套、硅胶囊、弹簧和接头底座组成，Y型正压接头和单正压接头中的弹簧也可不配备。
  5. 如权利要求2所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的注射器中的弹簧,也可是弹性贮液囊或是贮气囊或是弹性体代替。
  6. 如权利要求1-5任一项所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的导管夹，在其中间上、下夹合部的下凸起中部，顺着导管方向开一与小孔外壁的外径相匹配的卡槽。
  7. 如权利要求1或4所述的带缓释正压的留置针，其特征在于：所述带缓释正压的留置针的双腔导管的外表可增加一层避光层，导管座、Y型或直型正压接头的外套、接头底座和三通连接座、贮液器的注射器外套采用能避光的材料制成，或也采用在外增一层避光层。
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