WO2016150319A2 - 防回血装置及医用输液器 - Google Patents

防回血装置及医用输液器 Download PDF

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WO2016150319A2
WO2016150319A2 PCT/CN2016/076383 CN2016076383W WO2016150319A2 WO 2016150319 A2 WO2016150319 A2 WO 2016150319A2 CN 2016076383 W CN2016076383 W CN 2016076383W WO 2016150319 A2 WO2016150319 A2 WO 2016150319A2
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liquid
liquid storage
infusion
tube
storage chamber
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WO2016150319A3 (zh
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魏安
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Guangzou Youan Medical Technology Co Ltd
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Guangzou Youan Medical Technology Co Ltd
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  • the invention relates to the field of medical instruments, in particular to an anti-return blood device which can be used for preventing blood return in a medical infusion device, and also relates to a medical infusion device with the anti-blood return device.
  • the liquid medicine in the infusion device continues to flow until the venous pressure of the human body and the gravity of the drug in the infusion device are balanced. After the liquid medicine is stopped, the blood in the human body will flow back into the catheter of the infusion set due to the diffusion of the liquid. This phenomenon not only causes the patient to panic, but also takes time for the nurse to drive the blood back to the human body, and there is also a patient occurrence. The possibility of a blood clot can even lead to a medical accident.
  • there are related anti-return blood transfusion devices at home and abroad which mainly adopt the following two schemes:
  • One of the schemes is: using a structure such as a float ball or a buoy, in the process of infusion, the float floats, the liquid flows down the gap between the float or the buoy and the infusion tube; when the infusion is stopped, the float sinks, and The gap between the infusion tube and the infusion tube is blocked, so that the liquid medicine in the infusion tube is in a state of weightlessness, thereby achieving the function of preventing blood return.
  • the application number is "200720186093.7”, “201120565710.0” and other Chinese patents.
  • Another solution is: when the infusion is completed, there is a component partially blocking the front end of the liquid discharge tube, or a slow flow device is used to slow down the flow rate of the liquid medicine, and the liquid medicine has a small flow rate in a long time, thereby being Achieve anti-return effect.
  • the application number is "201210103462.7", “201210189228.0” and other Chinese patents.
  • the liquid discharge pipe is provided with only one liquid inlet, and the flow rate of the chemical liquid is controlled by the structure of the component or the slow flow device which partially blocks the front end of the liquid discharge pipe, and the flow rate of the chemical liquid is related to the pressure and the aperture.
  • the production process is difficult to control, the process is complicated, the production cost is high, and it is difficult to achieve the expected anti-return effect.
  • the object of the present invention is to provide an anti-return device which is simpler in structure and more effective in preventing blood return, and a medical infusion device with the anti-blood-back device is also proposed accordingly.
  • An anti-bleeding device includes a cavity, the cavity is provided with a vent hole, a liquid inlet and a liquid discharge port, and a liquid storage tank and a siphon channel are disposed inside; the vent hole a gas permeable hydrophobic water blocking film is disposed; the liquid storage tank is located above the siphon channel, and a hydrophilic liquid stopping liquid filtration film is sealed on the groove to form a liquid storage chamber; a liquid discharge port is disposed in the liquid storage chamber, the liquid inlet is disposed outside the liquid storage chamber; and the siphon channel is provided with a first a notch that is in contact with the outer surface of the hydrophilic liquid-repellent liquid filtration membrane through the first gap.
  • the liquid discharge port is disposed at the top of the liquid storage chamber.
  • a diaphragm is disposed on the channel surface of the siphon channel.
  • the membrane is a hydrophilic membrane.
  • the siphon channel has a V-shaped cross section.
  • the siphon channel has a channel surface width greater than 0 mm and no greater than 5 mm.
  • the invention relates to a medical infusion device corresponding to the anti-return device of any of the above aspects.
  • the medical infusion device further comprises a cork puncture device, a Murphy tube, an infusion tube, an intravenous infusion needle, and a flow rate adjuster; the cork puncture device and the Murphy tube are connected to each other; the anti-return device And communicating with the Murphy tube and the infusion tube respectively; the infusion tube and the intravenous infusion needle are in communication with each other; and a flow rate regulator is disposed on the outer wall of the infusion tube for controlling the flow rate of the liquid in the infusion tube.
  • the anti-returning device proposed by the present invention can connect the liquid inlet to the Murphy tube of the medical infusion device, and the liquid discharge port is connected with the infusion tube of the medical infusion device; when used, the Murphy tube can be used.
  • the liquid medicine is dropped into the cavity through the liquid inlet, and the liquid medicine will enter the liquid storage tank (and the liquid storage chamber) and the siphon channel and rise slowly; the air in the cavity will pass through
  • the gas permeable hydrophobic water blocking film is discharged from the vent hole and discharged through the liquid discharging port on the other hand (the air will not be able to be completely wetted when the hydrophilic liquid stopping liquid filter film is completely wetted by the liquid medicine) Passing through, that is, unable to enter the liquid storage chamber, and therefore no longer discharged from the liquid discharge port; when the liquid level of the chemical liquid exceeds the liquid discharge port, the liquid medicine inside the liquid storage chamber will be Discharging the liquid discharge port into the infusion tube (at the same time, the liquid medicine outside the liquid storage portion can pass through the hydrophilic liquid stop liquid filtration membrane into the liquid storage chamber, and is discharged from the liquid discharge port Into the infusion tube), the infusion can be started at this time; when the infusion is about to be completed, as the liquid dropped
  • the residual liquid inside the cavity is siphoned into the liquid storage chamber along the siphon channel, reaches the liquid discharge port through the liquid storage chamber, and is slowly discharged into the infusion tube from the liquid discharge port, so that the infusion tube can still be Keep positive pressure for a long time to prevent blood return.
  • the invention has the advantages of simple structure, time controllable, practical and effective.
  • FIG. 1 is a schematic perspective view of an embodiment of an anti-return device according to the present invention.
  • FIG. 2 is a schematic front view showing the structure of an anti-return device according to the present invention.
  • Figure 3 is a schematic perspective view of Figure 2.
  • FIG. 4 is a schematic rear view of the structure of FIG. 2.
  • Figure 5 is a cross-sectional view showing the structure taken along line A-A of Figure 2;
  • Figure 6 is a cross-sectional view showing the structure taken along line B-B of Figure 2;
  • FIG. 7 is a schematic structural view of an embodiment of a medical infusion set according to the present invention.
  • an embodiment of the anti-return device includes a cavity 100 , and the cavity 100 is provided with a vent hole 10 , a liquid inlet 20 and a liquid discharge port 30 .
  • a liquid storage tank 40 and a siphon channel 50 are disposed therein;
  • a gas permeable hydrophobic water blocking film 15 is disposed at the vent hole 10 (the gas permeable hydrophobic water blocking film 15 can only be permeable to air and cannot be permeable to liquid
  • the liquid storage tank 40 is located above the siphon channel 50, and a hydrophilic liquid stopping liquid filtering membrane 45 is sealed on the groove (the hydrophilic liquid stopping liquid filtering membrane 45 is dipped) After being wet, it can only be permeated by the liquid and cannot be permeated by the air, so that it forms a liquid storage chamber 43; the liquid discharge port 30 is disposed in the liquid storage chamber 43, and the liquid inlet 20 is disposed in the
  • the wicking channel 50 is provided with a first
  • the anti-bleeding device proposed in the embodiment is suitable for use in a medical infusion device (of course, also suitable for use in a blood transfusion device), and the liquid inlet 20 can be connected with the Murphy tube of the medical infusion device, and the liquid discharge port 30 and the medical infusion device
  • the infusion tube is connected; in use, the liquid medicine of the Murphy tube can be dropped into the cavity 100 through the liquid inlet 20, and the liquid medicine will enter the liquid storage tank 40 (and the liquid storage chamber 43). And the siphon channel 50 is slowly rising; the air in the cavity 100 will be discharged from the vent hole 10 through the permeable hydrophobic water blocking film 15 on the one hand, and discharged through the liquid discharge port 30 on the other hand.
  • the hydrophilic liquid stopping liquid filtration membrane 45 When the hydrophilic liquid stopping liquid filtration membrane 45 is completely wetted by the chemical liquid, the air will be impermeable, i.e., cannot enter the liquid storage chamber 43, and therefore will not be discharged from the liquid discharge port 30)
  • the liquid level of the chemical liquid exceeds the liquid discharge port 30
  • the liquid medicine inside the liquid storage chamber 43 can be discharged from the liquid discharge port 30 into the infusion tube (at the same time, the medicine outside the liquid storage chamber 43)
  • the liquid can enter the inside of the liquid storage chamber 43 through the hydrophilic liquid stopping liquid filtration membrane 45, and is discharged from the liquid discharge port 30 into the infusion tube), and the liquid can be started.
  • the embodiment has the advantages of simple structure, time controllable (by changing the volume of the lower part of the cavity 100, the pore size of the hydrophilic liquid-repellent liquid filtration membrane 45, etc., which can change the anti-return time), practical and effective effects.
  • the siphon channel 50 is further optimized in this embodiment.
  • the liquid discharge port 30 is preferably disposed at the top of the liquid storage chamber 43 or, of course, may be disposed at the middle or the bottom of the liquid storage chamber 43, but the embodiment is preferably disposed at the top for optimal effect.
  • a diaphragm 55 is disposed on the channel surface of the siphon channel 50.
  • the main function of the diaphragm 55 is to cover the siphon channel 50 in a closed or semi-closed state, so that it forms a "sipper" structure, and more effectively passes the liquid remaining at the bottom of the cavity 100.
  • the siphon action is drained into the reservoir 43 and discharged from the drain port 30. Therefore, the material of the separator 55 is not particularly limited in this embodiment, and it may be a hydrophilic membrane or a hydrophobic membrane. This embodiment is preferably a hydrophilic film.
  • the cross section of the siphon channel 50 is preferably V-shaped in order to more effectively achieve drainage of the residual drug solution at the bottom of the cavity 100, while the channel width thereof is preferably greater than 0 mm and not greater than 5 mm.
  • the siphon channel is further provided with a second notch 52; and the second notch 52 is located opposite to the cavity. The bottom of the 100.
  • the present invention also provides an embodiment of a medical infusion set comprising any of the above embodiments of the anti-return device.
  • the medical infusion set embodiment further includes a stopper puncture device 200, a Murphy tube 300, an infusion tube 400, an intravenous infusion needle 500, and a flow rate adjuster 600; the cork stopper 200 and the Murphy's tube 300 are in communication with each other; the above-mentioned anti-return device is in communication with the Murphy tube 300 and the infusion tube 400, respectively; the infusion tube 400 and the intravenous infusion needle 500 are in communication with each other; the flow rate regulator 600 is installed in the chamber The outer wall of the infusion tube 400 is used to control the flow rate of the liquid in the infusion tube 400.
  • the medical infusion device embodiment proposed by the present invention also has the beneficial effects corresponding to the above embodiment of the anti-return device, and details are not described herein again.

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  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • External Artificial Organs (AREA)

Abstract

本发明涉及一种防回血装置及一种医用输液器，其中，防回血装置包括腔体，所述腔体上设置有排气孔、进液口和排液口，其内部设置有储液槽和虹吸渠；所述排气孔处设置有透气疏水性阻水膜；所述储液槽相对位于所述虹吸渠的上方，且其槽口上面设置有亲水性止液药液过滤膜，使其形成储液室；所述排液口设置在所述储液室内，所述进液口设置在所述储液室外；所述虹吸渠设置有第一缺口，其通过所述第一缺口跟所述亲水性止液药液过滤膜外表面相接。本发明具备结构简单、时间可控、实用、有效等有益效果。

Description

防回血装置及医用输液器 技术领域
本发明涉及医疗器械领域，具体涉及一种可用于医用输液器中起到防回血作用的防回血装置，同时还涉及一种带有该防血回装置的医用输液器。
背景技术
现有的大部分医用输液器在输液过程中，输液器内的药液一直流下去，直至人体的静脉压与输液器中药物的重力平衡时药液才停止。在药液停止后，由于液体的扩散作用，人体里的血液会回流到输液器的导管中，这种现象不但会引起病人的惊恐，需要护士花时间驱使血液流回人体，而且还存在患者发生血栓的可能性，甚至导致医疗事故的发生。为解决这些问题，国内外已有相关防回血输液装置，其主要采用以下两种方案：
其中一种方案为：采用浮球或浮标等结构，在输液过程中，浮球浮起，药液顺着浮球或浮标与输液管的缝隙流下；停止输液时，浮球下沉，将其与输液管之间的缝隙堵住，使输液管中的药液处于失重状态，以此来达到防回血功能。如申请号为“200720186093.7”、“201120565710.0”等中国专利。但是，由于人体静脉压的作用及液体具有相互扩散的作用，导致血液会倒流回输液器中，所以无法达到防回血的效果，这样会更容易造成血栓形成，更易造成医疗事故。
另一种方案为：接近输液完成时，存在一组件部分堵住排液管前端，或使用缓流装置来减缓药液的流速，药液在较长的时间内，其流速较小，从而可达到防回血的效果。如申请号为“201210103462.7”、“201210189228.0”等中国专利。目前的实施方式中，排液管均只设有一进液口，药液的流速由部分堵住排液管前端的组件或者缓流装置的结构来控制，由于药液流速与压力、孔径有关，使产品生产过程难以控制，工艺复杂，生产成本高，难以达到预期的防回血效果。
发明内容
本发明的目的在于提供一种结构更加简单、且更能有效防回血的防回血装置，同时还相应提出一种带有该防血回装置的医用输液器。
本发明提出的一种防回血装置，其包括腔体，所述腔体上设置有排气孔、进液口和排液口，其内部设置有储液槽和虹吸渠；所述排气孔处设置有透气疏水性阻水膜；所述储液槽相对位于所述虹吸渠的上方，且其槽口上面密封有亲水性止液药液过滤膜，使其形成储液室；所述排液口设置在所述储液室内，所述进液口设置在所述储液室外；所述虹吸渠设置有第一 缺口，其通过所述第一缺口跟所述亲水性止液药液过滤膜外表面相接。
优选的，所述排液口设置在所述储液室内的顶部。
优选的，所述虹吸渠的渠面上设置有隔膜。
优选的，所述隔膜为亲水膜。
优选的，所述虹吸渠的横截面为V型。
优选的，所述虹吸渠的渠面宽度大于0mm且不大于5mm。
本发明相应提出的一种医用输液器，其包括上述任一方案的防回血装置。
优选的，所述医用输液器还包括瓶塞穿刺器、墨菲氏管、输液管、静脉输液针以及流速调节器；所述瓶塞穿刺器和墨菲氏管相互连通；所述防回血装置分别与所述墨菲氏管和输液管连通；所述输液管和静脉输液针相互连通；流速调节器安设在所述输液管外壁上，用于控制所述输液管中液体的流速。
有益效果：本发明提出的防回血装置，可将其进液口与医用输液器的墨菲氏管连通，排液口与医用输液器的输液管连通；使用时，可将墨菲氏管的药液通过所述进液口滴入所述腔体中，药液将进入所述储液槽(及储液室)和虹吸渠中并慢慢上涨；腔体中的空气将一方面透过所述透气疏水性阻水膜从所述排气孔排出，另一方面通过所述排液口排出(当所述亲水性止液药液过滤膜被药液完全浸湿后，空气将无法透过，即无法进入所述储液室，因此不再从所述排液口排出)；当所述药液的液面超过所述排液口时，储液室内部的药液将可从所述排液口排到输液管中(同时，储液室外部的药液可以透过所述亲水性止液药液过滤膜进入所述储液室内部，并从所述排液口排到输液管中)，此时便可开始进行输液；在输液即将完成时，随着滴入所述腔体的药液减少，将会产生虹吸作用，腔体内部残留的药液顺着虹吸渠被虹吸到储液室中，经储液室到达排液口，并从所述排液口缓慢排入输液管中，使输液管内依然能够保持较长时间的正压，防止回血。本发明具备结构简单、时间可控、实用、有效等有益效果。
附图说明
图1是本发明提出的一种防回血装置实施例的立体结构示意图。
图2是本发明提出的一种防回血装置实施例的主视结构示意图。
图3是图2的透视结构示意图。
图4是图2的后视结构示意图。
图5是图2的A-A剖视结构示意图。
图6是图2的B-B剖视结构示意图。
图7是本发明提出的一种医用输液器实施例的结构示意图。
图中：10-排气孔，15-透气疏水性阻水膜，20-进液口，30-排液口，40-储液槽，43-储液室，45-亲水性止液药液过滤膜，50-虹吸渠，51-第一缺口，52-第二缺口，55-隔膜，100-腔体，200-瓶塞穿刺器，300-墨菲氏管，400-输液管，500-静脉输液针，600-流速调节器。
具体实施方式
为了便于本领域技术人员理解，下面将结合附图以及实施例对本发明进行进一步描述。
请一并参阅图1至图6，本发明提出的一种防回血装置实施例，其包括腔体100，所述腔体100上设置有排气孔10、进液口20和排液口30，其内部设置有储液槽40和虹吸渠50；所述排气孔10处设置有透气疏水性阻水膜15(该透气疏水性阻水膜15只能被空气透过，不能被液体透过)；所述储液槽40相对位于所述虹吸渠50的上方，且其槽口上面密封有亲水性止液药液过滤膜45(该亲水性止液药液过滤膜45在浸湿之后只能被液体透过，不能被空气透过)，使其形成储液室43；所述排液口30设置在所述储液室43内，所述进液口20设置在所述储液室43外；所述虹吸渠50设置有第一缺口51，其通过所述第一缺口51跟所述亲水性止液药液过滤膜45外表面(本实施例中亲水性止液药液过滤膜45位于储液室43内的表面为内表面，位于储液室43外的表面为外表面)相接。
本实施例提出的防回血装置适用于医用输液器中(当然也适用于输血器中)，可将其进液口20与医用输液器的墨菲氏管连通，排液口30与医用输液器的输液管连通；使用时，可将墨菲氏管的药液通过所述进液口20滴入所述腔体100中，药液将进入所述储液槽40(及储液室43)和虹吸渠50中并慢慢上涨；腔体100中的空气将一方面透过所述透气疏水性阻水膜15从所述排气孔10排出，另一方面通过所述排液口30排出(当所述亲水性止液药液过滤膜45被药液完全浸湿后，空气将无法透过，即无法进入所述储液室43，因此不再从所述排液口30排出)；当所述药液的液面超过所述排液口30时，储液室43内部的药液将可从所述排液口30排到输液管中(同时，储液室43外部的药液可以透过所述亲水性止液药液过滤膜45进入所述储液室43内部，并从所述排液口30排到输液管中)，此时便可开始进行输液；在输液即将完成时，随着滴入所述腔体100的药液减少，将会产生虹吸作用，腔体100内部残留的药液顺着虹吸渠50被虹吸到储液室43中，经储液室43到达排液口30，并从所述排液口30缓慢排入输液管中，使输液管内依然能够保持较长时间的正压，防止回血。本实施例具备结构简单、时间可控(通过改变腔体100下部体积、亲水性止液药液过滤膜45孔径等可改变防回血时间)、实用、有效等有益效果。
为了更好地实现本实施例的目的，本实施例还对所述虹吸渠50做了进一步优化。
具体的，所述排液口30优选设置在所述储液室43内的顶部，当然也可设置在储液室43内的中部或底部，但本实施例优选设置在顶部，以达到最佳效果。
进一步，所述虹吸渠50的渠面上设置有隔膜55。
所述隔膜55的主要作用是为了将所述虹吸渠50封盖成封闭或半封闭状态，使所述其形成一“吸管”结构，更有效地将所述腔体100底部残留的药液通过虹吸作用引流至储液室43中，并从排液口30排出。因此，本实施例对隔膜55的材料不作特殊限定，其可以是亲水膜也可以是疏水膜。本实施例优选为亲水膜。
所述虹吸渠50的横截面优选为V型，以便更有效地实现对所述腔体100底部残留药液的引流，同时，其渠面宽度优选为大于0mm且不大于5mm。
本实施例中，为了使腔体100底部的残留药液能够顺利进入所述虹吸渠50中，所述虹吸渠还设置有第二缺口52；且所述第二缺口52相对位于所述腔体100内的底部。
相应的，本发明还提出了一种医用输液器实施例，其包括上述防回血装置实施例中任一可选方案。
进一步地，请参阅图7，所述医用输液器实施例其还包括瓶塞穿刺器200、墨菲氏管300、输液管400、静脉输液针500以及流速调节器600；所述瓶塞穿刺器200和墨菲氏管300相互连通；上述防回血装置分别与所述墨菲氏管300和输液管400连通；所述输液管400和静脉输液针500相互连通；流速调节器600安设在所述输液管400外壁上，用于控制所述输液管400中液体的流速。
可以理解的是，本发明提出的医用输液器实施例同样具备与上述防回血装置实施例相应的有益效果，这里不再赘述。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (9)

  1. 一种防回血装置，其特征在于，包括腔体，所述腔体上设置有排气孔、进液口和排液口，其内部设置有储液槽和虹吸渠；所述排气孔处设置有透气疏水性阻水膜；所述储液槽相对位于所述虹吸渠的上方，且其槽口上面密封有亲水性止液药液过滤膜，使其形成储液室；所述排液口设置在所述储液室内，所述进液口设置在所述储液室外；所述虹吸渠设置有第一缺口，其通过所述第一缺口跟所述亲水性止液药液过滤膜外表面相接。
  2. 根据权利要求1所述的防回血装置，其特征在于，所述排液口设置在所述储液室内的顶部。
  3. 根据权利要求1所述的防回血装置，其特征在于，所述虹吸渠的渠面上设置有隔膜。
  4. 根据权利要求3所述的防回血装置，其特征在于，所述隔膜为亲水膜。
  5. 根据权利要求1所述的防回血装置，其特征在于，所述虹吸渠的横截面为V型。
  6. 根据权利要求1所述的防回血装置，其特征在于，所述虹吸渠的渠面宽度大于0mm且不大于5mm。
  7. 根据权利要求1所述的防回血装置，其特征在于，所述虹吸渠还设置有第二缺口，所述第二缺口相对位于所述腔体内的底部。
  8. 一种医用输液器，其特征在于，包括权利要求1所述的防回血装置。
  9. 根据权利要求8所述的医用输液器，其特征在于，还包括瓶塞穿刺器、墨菲氏管、输液管、静脉输液针以及流速调节器；所述瓶塞穿刺器和墨菲氏管相互连通；所述防回血装置分别与所述墨菲氏管和输液管连通；所述输液管和静脉输液针相互连通；流速调节器安设在所述输液管外壁上，用于控制所述输液管中液体的流速。
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