WO2021078155A1 - Valve unidirectionnelle et cathéter médical doté de celle-ci - Google Patents

Valve unidirectionnelle et cathéter médical doté de celle-ci Download PDF

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Publication number
WO2021078155A1
WO2021078155A1 PCT/CN2020/122502 CN2020122502W WO2021078155A1 WO 2021078155 A1 WO2021078155 A1 WO 2021078155A1 CN 2020122502 W CN2020122502 W CN 2020122502W WO 2021078155 A1 WO2021078155 A1 WO 2021078155A1
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WIPO (PCT)
Prior art keywords
way valve
liquid
catheter body
deformed portion
flow hole
Prior art date
Application number
PCT/CN2020/122502
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English (en)
Chinese (zh)
Inventor
叶乐
许冠哲
高猛
杨旭燕
Original Assignee
杭州未名信科科技有限公司
浙江省北大信息技术高等研究院
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Application filed by 杭州未名信科科技有限公司, 浙江省北大信息技术高等研究院 filed Critical 杭州未名信科科技有限公司
Publication of WO2021078155A1 publication Critical patent/WO2021078155A1/fr

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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
    • A61M39/24—Check- or non-return valves

Definitions

  • the invention belongs to the field of medical equipment, and specifically relates to a one-way valve and a medical catheter with the one-way valve.
  • Medical catheters are widely used in various medical devices that require liquid delivery, such as the most common infusion catheters.
  • the mechanical properties and biocompatibility of the medical catheters have more stringent requirements.
  • medical catheters are also required to have some special properties, such as unidirectional fluidity. Take the medical catheter of an implantable insulin pump as an example. If the medical catheter does not have unidirectional fluidity, the body fluid will come into contact with the drug solution in the medical catheter, thereby contaminating the drug. Insulin is also easy to crystallize, which hinders the delivery of subsequent drug solutions and affects the therapeutic effect.
  • medical catheters usually use one-way valves to achieve their one-way fluidity.
  • the existing one-way valves are mostly controlled by circuits, and sealing problems need to be considered in a liquid environment, so the structure is complicated and the cost is high.
  • the purpose of the present invention is to at least solve the problem of complicated structure and high cost of the one-way valve of the existing medical catheter. This purpose is achieved through the following technical solutions:
  • the embodiment of the first aspect of the present invention proposes a one-way valve for a medical catheter.
  • the one-way valve includes a fixing portion for connecting the inner wall of the catheter body of the medical catheter.
  • the part is provided with a flow hole; a deformed part, the deformed part is connected to the fixed part, the deformed part has a first form and a second form, and the deformed part blocks the Overflow hole, when the deformed portion is in the second form, the blocking of the overflow hole is released, and when the liquid in the catheter body flows in the first direction, the deformed portion is driven into the first form, so When the liquid in the catheter body flows in the second direction, the deformed portion is driven into the second form.
  • the one-way valve of the embodiment of the present invention includes a fixed part and a deformed part.
  • the deformed part can switch between the first form and the second form under the action of the liquid in the catheter body of the medical catheter, and the deformed part is in the second form.
  • the overflow hole on the fixed part is blocked, and when the deformed part is in the second form, the blockage of the overflow hole is released, and when the liquid in the catheter body flows in the first direction, the deformed part is driven into the first form.
  • the deformed portion is driven into the second form, thereby ensuring that the liquid in the pipe body can only pass through the flow hole when flowing in the second direction, thereby realizing the liquid in the pipe body.
  • the one-way valve of the embodiment of the present invention has a purely mechanical structure, which does not need to be controlled by a circuit, and does not need to consider the sealing problem in a liquid environment, so the structure is relatively simple and the manufacturing cost is relatively low.
  • the one-way valve according to the embodiment of the present invention may also have the following additional technical features:
  • the deformable portion includes a plurality of bionic valves, and mouths are formed between the plurality of bionic valves, and the ends of the plurality of bionic valves are exposed to liquid flowing in the first direction. Under the action of, can be close to each other to close the mouth, and the ends of a plurality of the bionic petals can be moved away from each other under the action of the liquid flowing in the second direction to open the mouth.
  • the number of the bionic valve is three.
  • the bionic valve is made of one of polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
  • the deforming part is a blade rotatably connected with the fixed part.
  • the number of blades is two
  • the one-way valve further includes a connecting shaft disposed in the flow hole, the connecting shaft passes through the center of the flow hole, and two The blades are all rotatably connected with the connecting shaft.
  • the flow hole is a tapered hole that is tapered along the first direction, and the outer edge of the blade is a curved surface that matches the wall surface of the tapered hole.
  • the one-way valve is made of titanium alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, nickel alloy, polyethylene, polypropylene, nylon, polyether ether ketone, polytetrafluoroethylene , At least one of polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
  • the fixing part is a fixing ring.
  • the embodiment of the second aspect of the present invention proposes a medical catheter, including a catheter body and a one-way valve provided in the catheter body, the one-way valve being the one-way valve in any of the above-mentioned embodiments.
  • a medical catheter includes a catheter body and a one-way valve provided in the catheter body, wherein the one-way valve includes a fixing part and a deforming part, and the deforming part can act on the liquid in the catheter body of the medical catheter Switch between the first form and the second form.
  • the one-way valve is a purely mechanical structure, it does not need to be controlled by an electric circuit, nor does it need to consider the sealing problem in a liquid environment, so the structure is relatively simple and the manufacturing cost is relatively low.
  • Figure 1 is a schematic diagram of a medical catheter according to an embodiment of the present invention (the one-way valve is in the first form);
  • Figure 2 is a schematic diagram of a medical catheter according to an embodiment of the present invention (the one-way valve is in the second form);
  • Figure 3 is a schematic diagram of a one-way valve according to an embodiment of the present invention.
  • Figure 4 is a schematic diagram of a one-way valve according to another embodiment of the present invention (in the first form);
  • Fig. 5 is a schematic side view of the structure shown in Fig. 4;
  • Fig. 6 is a schematic diagram of a one-way valve according to another embodiment of the present invention (in the second form).
  • first, second, third, etc. may be used in the text to describe multiple elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be These terms are restricted. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless clearly indicated by the context, terms such as “first”, “second” and other numerical terms do not imply an order or order when used in the text. Therefore, the first element, component, region, layer or section discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings of the example embodiments.
  • spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms are, for example, “inner”, “outer”, and “inner”. “, “outside”, “below”, “below”, “above”, “above”, etc.
  • This spatial relative relationship term is intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure is turned over, then elements described as “below other elements or features” or “below other elements or features” will then be oriented as “above the other elements or features" or “over the other elements or features". Above features”. Therefore, the example term “below” can include an orientation of above and below.
  • the device can be otherwise oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are explained accordingly.
  • the embodiment of the first aspect of the present invention proposes a one-way valve 10, which is used in a medical catheter 100, and the one-way valve 10 includes a fixed portion 11 and a deformed portion 12.
  • the fixing part 11 is used to connect the inner wall of the catheter body 20 of the medical catheter 100, and the fixing part 11 is provided with a flow hole 111, and the flow hole 111 is used to allow the liquid in the catheter body 20 to pass through the one-way valve 10.
  • the deforming part 12 is connected to the fixing part 11.
  • the deforming part 12 has a first form and a second form that can be converted to each other. When the deforming part 12 is in the first form, the flow hole 111 is blocked.
  • the liquid in the catheter body 20 cannot Through the flow hole 111, when the deformed part 12 is in the second form, the blocking of the flow hole 111 is released. At this time, the liquid in the catheter body 20 can pass through the flow hole 111.
  • the deformed portion 12 is driven into the first form, and when the liquid in the catheter body 20 flows in the second direction, the deformed portion 12 is driven into the second form.
  • the liquid in the duct body 20 may have two opposite flow directions. If one of the flow directions is defined as the first direction, then the other flow direction is defined as the second direction.
  • the one-way valve 10 of the embodiment of the present invention includes a fixed portion 11 and a deformed portion 12.
  • the deformed portion 12 can be operated between the first form and the second form under the action of the liquid in the catheter body 20 of the medical catheter 100 Conversion: when the deformed part 12 is in the first form, the overflow hole 111 on the fixed part 11 is blocked, and when the deformed part 12 is in the second form, the overflow hole 111 is unblocked, and the liquid in the catheter body 20 follows the first form.
  • the deformed portion 12 is driven into the first form, and when the liquid in the catheter body 20 flows in the second direction, the deformed portion 12 is driven into the second form, thereby ensuring that the liquid in the catheter body 20 only moves in the second direction.
  • the one-way valve 10 of the embodiment of the present invention has a purely mechanical structure, which does not need to be controlled by a circuit, and does not need to consider the sealing problem in a liquid environment, so the structure is relatively simple and the manufacturing cost is relatively low.
  • the deforming portion 12 includes a plurality of bionic valves 121, and an opening 122 communicating with the flow hole 111 is formed between the plurality of bionic valves 121.
  • the ends can be close to each other under the action of the liquid flowing in the first direction to close the mouth 122, and the ends of the multiple pieces of bionic valve 121 can be moved away from each other under the action of the liquid flowing in the second direction to make the mouth 122 Open.
  • the deforming portion 12 includes a plurality of bionic valves 121, which mainly imitate the aortic valve in an animal body.
  • the ends of the multiple bionic valves 121 are moved away from each other under the impact of the liquid, so that the mouth 122 is opened. At this time, the liquid can pass through the flow hole. 111.
  • the bionic valve 121 is folded to close the mouth 122. At this time, the liquid cannot pass through the flow hole 111 .
  • the number of the bionic valve 121 is at least two, that is to say, the provision of two bionic valves 121 is the minimum requirement to realize the plugging of the flow hole 111 and the contact plugging.
  • the number of biomimetic valves 121 is three. In this case, the overflow hole 111 can be better blocked, and the number of biomimetic valves 121 can be relatively small, thereby reducing the processing cost.
  • the biomimetic valve 121 must have a certain deformability. Therefore, the preferred manufacturing material can be polyethylene, polypropylene, nylon, polyether ether ketone, polytetrafluoroethylene, polyoxymethylene, ABS (Acrylonitrile Butadiene Styrene, propylene One of nitrile-butadiene-styrene copolymer), PBT (Polybutylene terephthalate, polybutylene terephthalate), and polyphenylene sulfide.
  • polyethylene polypropylene, nylon, polyether ether ketone, polytetrafluoroethylene, polyoxymethylene, ABS (Acrylonitrile Butadiene Styrene, propylene One of nitrile-butadiene-styrene copolymer), PBT (Polybutylene terephthalate, polybutylene terephthalate), and polyphenylene sulfide.
  • the deforming portion 12 is a blade 123 rotatably connected to the fixed portion 11, and the rotation of the blade 123 can block and release the flow hole 111 Blocking, thereby realizing the one-way flow of the liquid in the catheter body 20.
  • the one-way valve 10 further includes a connecting shaft 13 arranged in the flow hole 111, the connecting shaft 13 passes through the center of the flow hole 111, and the two blades 123 are both rotatably connected with the connecting shaft 13.
  • the connecting shaft 13 passes through the center of the flow hole 111, and there are two blades 123 that are both rotatably connected to the connecting shaft 13.
  • the blades 123 can be arranged substantially symmetrically with respect to the connecting shaft 13, thereby ensuring When the liquid passes through the flow hole 111 when the two blades 123 are opened, the flow velocity of each part of the liquid is substantially equal, thereby ensuring the smooth flow of the liquid.
  • the flow hole 111 is a tapered hole arranged in a first direction
  • the outer edge of the blade 123 is a curved surface that matches the wall surface of the tapered hole
  • the flow hole 111 is set as a tapered hole.
  • a limit is formed on the blade 123, so as to ensure that the blade 123 does not continue to rotate after it rotates to block the flow hole 111.
  • the sealing performance when the blade 123 blocks the flow hole 111 can also be enhanced.
  • the one-way valve 10 can be made of metal materials or polymer materials, such as titanium alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, nickel alloy, polyethylene, polypropylene, nylon, polyether ether ketone, and polytetrafluoroethylene. At least one of ethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
  • the fixing portion 11 is a fixing ring
  • the outer diameter of the fixing ring can be adapted to the inner diameter of the catheter body 20 to ensure the assembly stability between the fixing ring and the catheter body 20.
  • the fixing ring and the catheter body 20 can be connected by two-shot injection molding, bonding, suture, stent fixation, and the like.
  • the embodiment of the second aspect of the present invention proposes a medical catheter 100, which includes a catheter body 20 and a one-way valve 10 provided in the catheter body 20.
  • the one-way valve 10 is the one-way valve 10 in any of the above-mentioned embodiments. .
  • the medical catheter 100 includes a catheter body 20 and a one-way valve 10 provided in the catheter body 20.
  • the one-way valve 10 includes a fixed portion 11 and a deformed portion 12, and the deformed portion 12 can be used in the medical catheter.
  • the liquid in the catheter body 20 of 100 switches between the first form and the second form. When the deformed part 12 is in the first form, the overflow hole 111 on the fixed part 11 is blocked, and the deformed part 12 is in the second form.
  • the blocking of the flow hole 111 is released, and when the liquid in the catheter body 20 flows in the first direction, the deformed portion 12 is driven into the first configuration, and when the liquid in the catheter body 20 flows in the second direction, the deformed portion is driven 12 enters the second form, thereby ensuring that the liquid in the duct body 20 can only pass through the flow hole 111 when flowing in the second direction, thereby realizing the unidirectional flow of the liquid in the duct body 20. Since the one-way valve 10 has a purely mechanical structure, it does not need to be controlled by an electric circuit, nor does it need to consider the sealing problem in a liquid environment, so the structure is relatively simple and the manufacturing cost is relatively low.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (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)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une valve unidirectionnelle et un cathéter médical doté de celle-ci, qui appartiennent au domaine des instruments médicaux. La valve unidirectionnelle (10) comprend : une partie fixe (11), la partie fixe (11) étant utilisée pour être reliée à la paroi interne d'un corps de cathéter (20) d'un cathéter médical, un trou traversant (111) étant disposé sur la partie fixe (11) ; et une partie de déformation (121), la partie de déformation (121) étant reliée à la partie fixe (11), la partie de déformation (121) ayant une première forme et une seconde forme, la partie de déformation (121) bloquant le trou traversant (111) lorsqu'elle se trouve dans la première forme, et la partie de déformation (121) débloquant le trou traversant (111) lorsqu'elle se trouve dans la seconde forme, lorsqu'un liquide dans le corps de cathéter (20) s'écoule dans une première direction, la partie de déformation (121) étant entraînée pour se trouver dans la première forme, et lorsque le liquide dans le corps de cathéter (20) s'écoule dans une seconde direction, la partie de déformation (121) étant entraînée pour se trouver dans la seconde forme. La valve unidirectionnelle a une structure purement mécanique qui ne nécessite pas de circuit pour effectuer une commande ou n'a pas besoin de prendre en compte le problème d'étanchéité dans un environnement liquide, ce qui permet ainsi d'avoir une structure relativement simple et un coût de fabrication relativement bas.
PCT/CN2020/122502 2019-10-22 2020-10-21 Valve unidirectionnelle et cathéter médical doté de celle-ci WO2021078155A1 (fr)

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CN201911008104.6A CN110947092A (zh) 2019-10-22 2019-10-22 单向阀及具有其的医用导管
CN201911008104.6 2019-10-22

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947092A (zh) * 2019-10-22 2020-04-03 浙江省北大信息技术高等研究院 单向阀及具有其的医用导管

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4666429A (en) * 1986-02-26 1987-05-19 Intelligent Medicine, Inc. Infusion device having improved valving apparatus
US6565526B2 (en) * 2000-03-09 2003-05-20 The Regents Of The University Of California Bistable microvalve and microcatheter system
CN201791165U (zh) * 2010-07-25 2011-04-13 李雪甫 瓣膜形止回血输液装置
CN102989083A (zh) * 2012-12-15 2013-03-27 于秀月 管道内防回流瓣膜
CN205391382U (zh) * 2016-01-19 2016-07-27 泸州医学院附属医院 一种新型引流袋
CN106308985A (zh) * 2015-07-03 2017-01-11 上海交通大学医学院附属新华医院 防返流胆道引流支架
CN107126621A (zh) * 2017-03-30 2017-09-05 史源 用于管路的磁性连接装置
CN110947092A (zh) * 2019-10-22 2020-04-03 浙江省北大信息技术高等研究院 单向阀及具有其的医用导管

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660205A (en) * 1994-12-15 1997-08-26 Epstein; Alan B. One-way valve
DK2512574T3 (en) * 2009-12-18 2018-01-08 Coloplast As UROLOGICAL DEVICE
US9126012B2 (en) * 2011-10-06 2015-09-08 Becton, Dickinson And Company Intravenous catheter with duckbill valve
ES2969696T3 (es) * 2012-04-06 2024-05-22 Bard Inc C R Método para formar un catéter de extremo cerrado
WO2015104336A1 (fr) * 2014-01-08 2015-07-16 B. Braun Melsungen Ag Dispositifs cathéters à soupapes et procédés apparentés
CN204864535U (zh) * 2015-08-10 2015-12-16 安徽省天康医疗用品有限公司 一种医疗输液用防回流阀
CN105240576B (zh) * 2015-09-11 2018-03-06 尹钢 工业用仿生瓣膜式高频响应单向流动启闭阀
CN206745698U (zh) * 2016-12-28 2017-12-15 天津哈娜好医材有限公司 一种输液器防回流装置
CN207101600U (zh) * 2017-01-23 2018-03-16 青岛市第三人民医院 急诊室用人工呼吸装置
CN108653872A (zh) * 2017-03-29 2018-10-16 张家界航空工业职业技术学院 一种防止血液回流的注射/输液针管
CN207856069U (zh) * 2017-07-10 2018-09-14 江苏雅凯医疗科技有限公司 医用单向阀
CN207421355U (zh) * 2017-11-01 2018-05-29 高特控股集团有限公司 一种具有防回流功能的阀门
CN108355225B (zh) * 2018-01-24 2021-04-27 山东百多安医疗器械股份有限公司 一种具有双重防返流瓣膜的静脉导管及其制备方法
CN108211043A (zh) * 2018-03-06 2018-06-29 江苏苏云医疗器材有限公司 无针加药装置
CN208545215U (zh) * 2018-07-06 2019-02-26 李政宏 一种新型污水处理管道
CN109125863A (zh) * 2018-09-30 2019-01-04 天津伊腾圣杰医疗器械有限公司 一种多功能注射组件
CN109172928A (zh) * 2018-09-30 2019-01-11 天津伊腾圣杰医疗器械有限公司 一种注射导管止回阀
CN109731174A (zh) * 2019-02-15 2019-05-10 王爱莲 一种高效妇科临床用阴道清洗装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4666429A (en) * 1986-02-26 1987-05-19 Intelligent Medicine, Inc. Infusion device having improved valving apparatus
US6565526B2 (en) * 2000-03-09 2003-05-20 The Regents Of The University Of California Bistable microvalve and microcatheter system
CN201791165U (zh) * 2010-07-25 2011-04-13 李雪甫 瓣膜形止回血输液装置
CN102989083A (zh) * 2012-12-15 2013-03-27 于秀月 管道内防回流瓣膜
CN106308985A (zh) * 2015-07-03 2017-01-11 上海交通大学医学院附属新华医院 防返流胆道引流支架
CN205391382U (zh) * 2016-01-19 2016-07-27 泸州医学院附属医院 一种新型引流袋
CN107126621A (zh) * 2017-03-30 2017-09-05 史源 用于管路的磁性连接装置
CN110947092A (zh) * 2019-10-22 2020-04-03 浙江省北大信息技术高等研究院 单向阀及具有其的医用导管

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