WO2010048778A1 - 自动排气防气泡输液器 - Google Patents

自动排气防气泡输液器 Download PDF

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Publication number
WO2010048778A1
WO2010048778A1 PCT/CN2009/001171 CN2009001171W WO2010048778A1 WO 2010048778 A1 WO2010048778 A1 WO 2010048778A1 CN 2009001171 W CN2009001171 W CN 2009001171W WO 2010048778 A1 WO2010048778 A1 WO 2010048778A1
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WIPO (PCT)
Prior art keywords
liquid
infusion
hole
axial
pipe
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Application number
PCT/CN2009/001171
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English (en)
French (fr)
Inventor
徐土松
周丽
Original Assignee
Xu Tusong
Zhou Li
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CNU2008201667169U external-priority patent/CN201275336Y/zh
Priority claimed from CN2008101216667A external-priority patent/CN101385884B/zh
Application filed by Xu Tusong, Zhou Li filed Critical Xu Tusong
Publication of WO2010048778A1 publication Critical patent/WO2010048778A1/zh

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Classifications

    • 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
    • A61M5/36—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 with means for eliminating or preventing injection or infusion of air into 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

Definitions

  • the invention relates to a medical device, in particular to an infusion set.
  • Existing infusion sets generally include a stopper puncture device, a drip bucket, and an infusion hose, which are easy to form bubbles in the drip bucket and the infusion hose during use, so the nurse needs to perform the operation of eliminating the air bubbles, which increases the operation time.
  • Chinese patent (patent number: ZL032054599) proposes an anti-bubble infusion device. This infusion remover removes excess gas from the dripper and the change of the position of the dripper does not enter the downcomer. It is suitable for non-gravity infusion sets, but still at the beginning of operation. Must be manually vented.
  • Cipheral patent application discloses an automatic exhaust self-destructing infusion set consisting of a cork puncture, a catheter and a dripper, characterized in that there is an exhaust pipe in the dripper, and its lower end It is connected to the lower conduit, and the upper end is inclined.
  • the excess gas in the drip bucket is automatically discharged through the exhaust pipe.
  • the liquid level of the chemical liquid exceeds the infusion hole of the exhaust pipe, it flows from the infusion hole into the downcomer. Excess gas in the drip chamber was discharged before the liquid medicine flowed into the downcomer, and no air bubbles were formed to achieve automatic exhaust.
  • the object of the present invention is to provide an automatic exhaust infusion set which effectively solves the technical problem of bubble generation of an infusion set, and has the characteristics of simple structure and convenient use.
  • the present invention adopts the following technical solutions: Automatic infusion infusion set, the infusion set includes a cork piercing device, a flow regulating valve, a drip bucket, an upper infusion hose and a lower infusion hose, the upper infusion hose is connected to the cork penetrator, and the flow regulating valve is arranged in the lower infusion
  • the liquid inlet and the outlet of the dripper are respectively connected to the infusion hose and the lower infusion hose
  • the lower outlet of the dripper is provided with a lower connecting tube
  • the lower end of the lower connecting tube is connected to the lower end
  • the infusion hose, the upper end of the lower connecting pipe extends upward to form an exhaust pipe, the exhaust pipe is provided with an axial through hole, the axial through hole is electrically connected with the lower infusion hose, and is axially in the peripheral wall of the exhaust pipe
  • a liquid guiding gap that is electrically connected to the axial through hole is provided.
  • the anti-bubble generating principle of the present invention is as follows: After the liquid enters the drip bucket, since the liquid has surface tension, the pressure of the liquid at the beginning cannot overcome the surface tension formed by the liquid in the liquid guiding gap, and the liquid cannot enter the axial through hole; Dropping, the liquid immerses the liquid guiding gap, and the air pressure of the drip bucket increases. When the sum of the air pressure and the liquid pressure causes the pressure to overcome the surface tension formed by the liquid in the liquid guiding gap, the liquid breaks into the gap and enters the axial through hole. Conduct fluid guiding. At this time, since the bubble generated at the time of dropping has floated up after a certain period of time, the liquid entering the bottom of the axial through hole has no bubble, and the generation of the bubble can be effectively prevented.
  • the above liquid guiding slits are one or two or three or four.
  • more than four liquid-conducting gaps increase the cost of processing and at the same time reduce the strength of the exhaust pipe.
  • the upper end of the axial through hole is closed. Closing the upper end of the axial through hole prevents liquid from dripping directly into the axial through hole.
  • the length of the liquid guiding slit is 0.5 cm to 3.0 cm.
  • the length of the liquid guiding slit is very critical. When the length is too short, the amount of liquid in the drip tube is small when the surface tension is overcome, and the bubble does not have a sufficient floating distance; the length is too long, and the liquid dropping time for immersing the liquid guiding gap is increased.
  • the width of the liquid guiding slit described above is 0.2 to 1.5 mm.
  • the thickness of the outer wall of the exhaust pipe is 0. 5 ⁇ 1.5mm.
  • the above-mentioned liquid guiding slits are three or four, and three or four liquid guiding slits are uniformly disposed on the peripheral wall of the exhaust pipe, and the upper end of the axial through hole is closed. The upper end of the axial through hole is closed to prevent the liquid from directly dropping into the axial through hole; on the other hand, the strength of the exhaust pipe is increased.
  • the liquid inlet of the dripper is provided with an upper connecting pipe
  • the upper infusion hose is connected to the upper end of the upper connecting pipe
  • the upper connecting pipe extends downward to form a liquid discharging pipe
  • the bottom of the liquid discharging pipe is closed.
  • a liquid outlet hole is provided in the side wall of the discharge pipe.
  • the above-mentioned liquid guiding slit is one, and one liquid discharging hole is provided, and the liquid guiding slit and the liquid discharging hole are respectively provided on both sides.
  • the above structure has the simplest structure, and at the same time prevents the liquid on the liquid discharge hole from directly passing through the axial through hole.
  • the lower connecting pipe and the upper connecting pipe are each a hard plastic. Made of hard plastic for easy processing and assembly.
  • the invention adopts the above technical solution, and realizes the same function as compared with 200610146971.2, can effectively prevent the infusion device bubble generation and at the same time has self-destruction function, but the structure is simpler and more convenient to use, and the invention has Extensive promotion and application value.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • Fig. 2 is a schematic view showing the structure of the upper connecting pipe in the first embodiment.
  • Figure 3 is a schematic view showing the structure of the lower connecting pipe in the first embodiment.
  • Embodiment 2 is a schematic structural view of Embodiment 2 of the present invention. detailed description
  • the automatic infusion set includes a stopper puncturing device, a flow regulating valve, a drip bucket 1, an upper infusion hose 2, and a lower infusion hose 3 (the stopper puncturing device and the flow regulating valve are The existing structure is not marked in the drawing), the upper infusion hose 2 is connected to the stopper stopper, and the flow regulating valve is disposed on the lower infusion hose 3, and the inlet port 7 and the outlet port 8 of the dripper 1 are respectively The upper infusion hose 2 and the lower infusion hose 3 are connected, and the lower connecting tube 9 is sleeved on the liquid outlet 8 of the dripper 1, and the lower infusion hose 3 is connected to the lower end of the lower connecting tube 9. As shown in FIG.
  • the lower connecting pipe 9 is made of hard plastic, and the upper end of the lower connecting pipe 9 extends upward to form an exhaust pipe 10, and the exhaust pipe 10 is provided with an axial through hole 12, and the axial through hole 12 is The lower infusion hose 3 is electrically connected.
  • the thickness of the peripheral wall of the exhaust pipe 10 is 1.0 mm.
  • the peripheral wall of the exhaust pipe 10 is axially provided with a liquid guiding slit 11 which is electrically connected to the axial through hole 12.
  • the length of the liquid guiding slit 11 is 1.5 cm.
  • the width of the liquid slit 11 is 0.5 mm.
  • the inlet port 7 of the dripper 1 is provided with an upper connecting pipe 4, and the upper infusion hose 2 is connected to the upper end of the upper connecting pipe 4.
  • the upper connecting pipe 4 is made of hard plastic, and the upper connecting pipe 4 extends downward to form a liquid discharging pipe 5, the bottom of the liquid discharging pipe 5 is closed, and one liquid discharging is provided on the side wall of the liquid discharging pipe 5.
  • the hole 6, the liquid guiding slit 11 and the liquid discharging hole 6 are provided on both sides, respectively.
  • the automatic infusion set includes a drip bucket 1, an infusion hose 2 and a lower infusion hose 3, and the inlet port 7 and the outlet port 8 of the drip chamber 1 are respectively connected to the infusion soft
  • the tube 2 and the lower infusion hose 3 are provided with a lower connecting tube 9 on the liquid outlet 8 of the dripper 1, and the lower infusion tube 3 is connected to the lower end of the lower connecting tube 9.
  • the lower connecting pipe 9 is an upper end of the rigid plastic lower connecting pipe 9 extending upward to form an exhaust pipe 10, the exhaust pipe 10 is provided with an axial through hole 12, and the upper end of the axial through hole 12 is sealed.
  • the closed axial through hole 12 is electrically connected to the lower infusion hose 3.
  • the thickness of the peripheral wall of the exhaust pipe 10 is 1.0 mm, and the circumferential wall of the exhaust pipe 10 is uniformly provided with three liquid guiding slits 11 which are electrically connected to the axial through holes 12, and the length of the liquid guiding slit 11 is 1.5 cm.
  • the width of the liquid guiding slit 11 is 0.5 mm.
  • the inlet port 8 of the dripper 1 is provided with an upper connecting pipe 4, and the upper infusion hose 2 is connected to the upper end of the upper connecting pipe 4.
  • the upper connecting pipe 4 is made of hard plastic, and the upper connecting pipe 4 extends downward to form a liquid discharging pipe 5, and the bottom of the liquid discharging pipe 5 is closed, and the side walls of the liquid discharging pipe 5 are respectively provided on the side walls of the liquid discharging pipe 5 Outlet hole 6.

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

Abstract

一种自动排气输液器包括滴斗（1），上输液软管（2）和下输液软管（3）。滴斗（1）的进液口（7）和出液口（8）分别连通上输液管（2）和下输液软管（3）。滴斗（1）的出液口（8）上套接设有下连接管（9），并且下连接管（9）的下端连接下输液软管（3）。下连接管（9）的上端向上延伸形成排气管（10），轴向通孔（12）设于排气管（10）内，轴向通孔（12）与下输液软管（3）相导通。与轴向通孔（12）相导通的导液缝隙（11）轴向设置在排气管（10）的周壁。

Description

自动排气防气泡输液器 技术领域
本发明涉及一种医药器械， 尤其涉及一种输液器。
背景技术
现有的输液器一般包括瓶塞穿刺器、 滴斗和输液软管， 使用时容易在 滴斗和输液软管内形成气泡， 因此护士需要进行排除气泡的操作， 这样增 加了操作的时间。 中国专利 （专利号： ZL032054599)提出防气泡输液器， 这种输液器排除滴斗内多余气体后滴斗位置的改变气泡不会进入下导管， 适用于非重力输液器， 但在开始操作时仍须人工排气。
中国发明专利申请（申请号为 200610146971.2 ) 公开了一种由瓶塞穿 刺器、 导管和滴斗组成的自动排气自毁式输液器， 其特征是滴斗内有一支 排气管， 它的下端与下导管接通， 上端倾斜， 当药液注入滴斗时将滴斗内 多余的气体自动经排气管排出。 药液的液面超过排气管的输液孔时从输液 孔流入下导管。 在药液流入下导管前已将滴斗内多余的气体排出， 没有形 成气泡， 达到自动排气。 滴斗内输液孔下面的残留液不能排出， 无法清洗， 无法再用， 达到自毁作用。 由于上述的专利的排气管需要做成上端倾斜， 这样在铸模和安装排气管的时候均存在困难。
发明内容
为了解决现有的输液器使用时需要人工排除气泡的技术缺陷。 本发明 的目的是提供一种自动排气输液器， 其有效地解决了输液器气泡产生的技 术问题， 具有结构简单、 使用方便的特点。
为了实现上述的技术目的， 本发明采用了以下的技术方案： 自动排气输液器， 该输液器包括瓶塞穿剌器、 流量调节阀、 滴斗、 上 输液软管和下输液软管， 上输液软管连通瓶塞穿剌器， 流量调节阀设置在 下输液软管上， 滴斗的进液口和出液口分别连通上输液软管和下输液软管， 滴斗的出液口上套接设有下连接管， 下连接管的下端连接所述的下输液软 管， 下连接管上端向上延伸形成排气管， 所述的排气管内设有轴向通孔， 轴向通孔与下输液软管相导通， 并在排气管的周壁轴向设置有与轴向通孔 相导通的导液缝隙。
本发明的防气泡产生原理在于： 液体进入滴斗后， 由于液体具有表面 张力， 开始时液体的压强无法克服液体在导液缝隙形成的表面张力， 液体 不能进入轴向通孔； 在液体逐级滴加， 液体浸没导液缝隙， 同时滴斗的空 气压强增大， 在空气压强和液体的压强之和使压力克服液体在导液缝隙形 成的表面张力时， 液体突破缝隙进入轴向通孔， 进行导液。 此时， 由于经 过了一段时间， 在滴液时产出的气泡已经上浮， 而进入轴向通孔的底部的 液体不具有气泡， 可以有效地防止气泡产生。
作为优选， 上述的导液缝隙为 1条或 2条或 3条或 4条。 一般情况下， 导液缝隙多于 4条会增加加工的成本， 同时导致排气管的强度降低。
作为优选， 上述的轴向通孔的上端封闭。 将轴向通孔的上端封闭可以 防止液体直接滴入轴向通孔内。
作为优选， 上述的导液缝隙的长度为 0.5cm〜3.0cm。 导液缝隙的长度 是非常关键的， 长度过短， 则克服表面张力时， 滴管内液体量少， 无法使 气泡具有足够上浮距离； 长度过长， 增加浸没导液缝隙的液体滴加时间。
作为优选， 上述的导液缝隙的宽度为 0.2〜1.5mm。
作为优选， 上述的排气管的周壁的厚度为 0. 5〜1.5mm。 作为优选，上述的导液缝隙为 3条或 4条， 3条或 4条导液缝隙均匀设 置在排气管的周壁， 轴向通孔的上端封闭。 将轴向通孔的上端封闭， 一方 面防止液体直接滴入轴向通孔内； 另一方面增加排气管的强度。
作为优选， 上述的滴斗的进液口上设有上连接管， 所述的上输液软管 连接在上连接管的上端， 上连接管向下延伸形成出液管， 出液管的底部封 闭， 在出液管的侧壁设有出液孔。 上述的结构使液体浸液的时候， 最开始 是从液管侧壁流下， 可以避免由于开始就是滴加而产生气泡。
作为优选， 上述的导液缝隙为 1条， 出液孔为 1个， 导液缝隙和出液 孔分别设置在两侧。 上述结构， 结构最为简单， 同时又可以防止出液孔上 的液体直接轴向通孔内。
作为优选， 上述的下连接管和上连接管分别为硬质塑料。 采用硬质塑 料， 便于加工和装配。
本发明由于采用了上述的技术方案， 与 200610146971.2相比， 实现了 同样的功能， 可以有效地防止输液器气泡产生和同时又具有自毁功能， 但 是结构更为简单、 使用更方便， 本发明具有广泛的推广应用价值。
附图说明
图 1为本发明实施例 1的结构示意图。
图 2为实施例 1中上连接管的结构示意图。
图 3为实施例 1中下连接管的结构示意图。
图 4为本发明实施例 2的结构示意图。 具体实施方式
下面结合附图对本发明的具体实施方式做一个详细的说明。
实施例 1
如图 1所示的自动排气输液器， 该输液器包括瓶塞穿刺器、 流量调节 阀、 滴斗 1、 上输液软管 2和下输液软管 3 (瓶塞穿刺器和流量调节阀为现 有的结构未在附图中标记出）， 上输液软管 2连通瓶塞穿剌器， 流量调节阀 设置在下输液软管 3上， 滴斗 1的进液口 7和出液口 8分别连通上输液软 管 2和下输液软管 3， 滴斗 1的出液口 8上套接设有下连接管 9， 下连接管 9的下端连接所述的下输液软管 3。 如图 3所示， 下连接管 9为硬质塑料， 下连接管 9上端向上延伸形成排气管 10，所述的排气管 10内设有轴向通孔 12,轴向通孔 12与下输液软管 3相导通。排气管 10的周壁的厚度为 1.0mm， 排气管 10的周壁轴向设置有 1条与轴向通孔 12相导通的导液缝隙 11， 导 液缝隙 11的长度为 1.5cm， 导液缝隙 11的宽度为 0.5mm。
如图 1所示，滴斗 1的进液口 7上设有上连接管 4，所述的上输液软管 2连接在上连接管 4的上端。如图 2所示， 上连接管 4为硬质塑料， 上连接 管 4向下延伸形成出液管 5， 出液管 5的底部封闭，在出液管 5的侧壁设有 1个出液孔 6， 导液缝隙 11和出液孔 6分别设置在两侧。
实施例 2
如图 4所示的自动排气输液器，该输液器包括滴斗 1、上输液软管 2和 下输液软管 3，滴斗 1的进液口 7和出液口 8分别连通上输液软管 2和下输 液软管 3， 滴斗 1的出液口 8上套接设有下连接管 9， 下连接管 9的下端连 接所述的下输液软管 3。下连接管 9为硬质塑料下连接管 9上端向上延伸形 成排气管 10， 所述的排气管 10内设有轴向通孔 12， 轴向通孔 12的上端封 闭，轴向通孔 12与下输液软管 3相导通。排气管 10的周壁的厚度为 1.0mm, 排气管 10的周壁轴向均匀设置有 3条与轴向通孔 12相导通的导液缝隙 11， 导液缝隙 11的长度为 1.5cm， 导液缝隙 11的宽度为 0.5mm。
如图 4所示，滴斗 1的进液口 8上设有上连接管 4，所述的上输液软管 2连接在上连接管 4的上端。如图 2所示， 上连接管 4为硬质塑料， 上连接 管 4向下延伸形成出液管 5， 出液管 5的底部封闭，在出液管 5的两侧侧壁 上分别设有出液孔 6。

Claims

权 利 要 求 书
1. 自动排气输液器， 该输液器包括瓶塞穿剌器、 流量调节阀、 滴斗 （1)、 上输液软管（2)和下输液软管（3)， 上输液软管（2)连通瓶塞穿刺器， 流量调节阀设置在下输液软管 （3) 上， 滴斗 （1) 的进液口 （7) 和出 液口 （8) 分别连通上输液软管 （2) 和下输液软管 （3)， 其特征在于- 滴斗 （1) 的出液口 （8) 上套接设有下连接管 （9)， 下连接管 （9) 的 下端连接所述的下输液软管 （3), 下连接管 （9) 上端向上延伸形成排 气管（10)， 所述的排气管 (10) 内设有轴向通孔 (12)， 轴向通孔 (12) 与下输液软管 （3) 相导通， 并在排气管 （10) 的周壁轴向设置有与轴 向通孔 （12)相导通的导液缝隙 （11)。
2. 根据权利要求 1所述的自动排气输液器， 其特征在于： 导液缝隙 （11) 为 1条或 2条或 3条或 4条。
3. 根据权利要求 1所述的自动排气输液器， 其特征在于： 轴向通孔 （12) 的上端封闭。
4. 根据权利要求 1所述的自动排气输液器， 其特征在于： 导液缝隙 （11) 的长度为 0.5cm〜3.0cm。
5. 根据权利要求 1所述的自动排气输液器， 其特征在于： 导液缝隙 （11) 的宽度为 0.2〜1.5mm。
6. 根据权利要求 1所述的自动排气输液器， 其特征在于： 排气管 （10) 的 周壁的厚度为 0.5〜1.5mm。
7. 根据权利要求 1所述的自动排气输液器， 其特征在于： 导液缝隙 （11) 为 3条或 4条， 3条或 4条导液缝隙 （11)均匀设置在排气管 （10) 的 周壁， 轴向通孔（12) 的上端封闭。
8. 根据权利要求 1〜7任意一项权利要求所述的自动排气输液器， 其特征 在于： 滴斗 （1 ) 的进液口 （7)上设有上连接管 （4), 所述的上输液软 管 （2)连接在上连接管 （4) 的上端， 上连接管 （4) 向下延伸形成出 液管 （5)， 出液管 （5 ) 的底部封闭， 在出液管 （5) 的侧壁设有出液孔
(6)。
9. 根据权利要求 8所述的自动排气输液器， 其特征在于： 导液缝隙 （11 ) 为 1条， 出液孔（6) 为 1个， 导液缝隙（11 )和出液孔 （6)分别设置 在两侧。
10.根据权利要求 8所述的自动排气输液器， 其特征在于： 下连接管 （9) ' 和上连接管 （4) 分别为硬质塑料。
PCT/CN2009/001171 2008-10-27 2009-10-23 自动排气防气泡输液器 WO2010048778A1 (zh)

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