CN103656781B - The unidirectional fluid stopping device of a kind of venous transfusion - Google Patents
The unidirectional fluid stopping device of a kind of venous transfusion Download PDFInfo
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- CN103656781B CN103656781B CN201210353381.2A CN201210353381A CN103656781B CN 103656781 B CN103656781 B CN 103656781B CN 201210353381 A CN201210353381 A CN 201210353381A CN 103656781 B CN103656781 B CN 103656781B
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- fluid stopping
- end socket
- latex
- diaphragm
- diversion
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Abstract
The present invention relates to the unidirectional fluid stopping device of a kind of disposable intravenous infusion set, by the link at disposable intravenous infusion set capillary soft tube and tube for transfusion, unidirectional fluid stopping device with capillary soft tube one is set, prevent in infusion-completed or infusion process, patient sits up, stand, when even walking about, medicinal liquid reflux blood back phenomenon occurs.The present invention is little to disposable transfusion device structural modification, and structure is simple, and cost is low, is convenient to realize suitability for industrialized production, and does not change the work habit of medical personnel, is easy to be extended and applied, increases work efficiency, and saves piercing needle, reduces patient painful.
Description
Technical field
The object of the present invention is to provide a kind of venous transfusion unidirectional fluid stopping device, particularly one can prevent reflux in whole infusion process, the unidirectional fluid stopping device of anti-return blood.
Background technology
The disposable intravenous infusion set that current venous transfusion field uses, do not possess in infusion process and infusion-completed time, prevent reflux blood back function; Often there is blood back phenomenon to occur in transfusion, bring unexpected trouble to patient and medical worker; For this reason, many searchers and antecessor has been there is in this field, their Design and manufacture multiple in venous transfusion process and infusion-completed time, automatic flow-stop, prevent the device of reflux blood back, solve transfusion blood back problem, to reduce the cost of labor (reducing transfusion entourage) of transfusion nursing; Promote infusion safety, improve service quality, reduce the fruitless labour etc. of medical personnel; The method of current solution transfusion reflux blood back phenomenon has: one is increase plugging device in Murphy's dropper, as ball float, floating plug, flap valve etc., in order to when infusion-completed, ball floats etc. decline with the medicinal liquid face in Murphy's dropper, shutoff lower liquid outlet, medicinal liquid deficiency in tube for transfusion is declined, keeps overpressure to prevent reflux blood back; This method utilizes gravity principle, can realize cut-off easily, is effectively applicable to the patient be seated or recumbency is infused, but in patient posture variation, as stood, walking about, or sits up from the state of couching, all can cause reflux blood back.Two is install one-way non-return valve on Murphy's dropper tube for transfusion once, in infusion process and infusion-completed time stop the anti-return blood of reflux; In this, method generally adopts rubber finger sleeve, spring plug, elastic force door etc., and the shortcoming of these class methods has certain resistance to the flowing of medicinal liquid, affects the mobility of medicinal liquid; Three is adopt electronic equipment to the anti-return blood of the automatic cut-off realizing venous transfusion, its basic skills is installation detecting device on tube for transfusion, detects transfusion situation in real time, Timeliness coverage infusion-completed, start the stuck tube for transfusion of electrical installation, realize cut-off and prevent reflux blood back; These class methods want omnidistance power consumption detection, do not meet environmental protection and energy saving principle, and cost are higher; Four is directly adopt precision transfusion pump, not only can realize accurate control, prevent reflux blood back, also realize precision transfusion and infusion management; This method makes simple question complicated, the target lowered consumption with energy-conserving and environment-protective runs in the opposite direction, but also needs user to have certain technical ability, the more important thing is that this method is non-gravity infusion, natural namely science, lose nature and also just lose science; Lose gravity, also just lose safety.Therefore in venous transfusion, Design and manufacture can avoid above-mentioned defect, and the single intravenous infusion unidirectional fluid stopping device that reflux blood back phenomenon can be stoped again to occur is very necessary.
Summary of the invention
The object of the present invention is to provide a kind of can automatic unidirectional fluid stopping in venous transfusion, the unidirectional fluid stopping device of anti-return blood, in order to achieve the above object, technical scheme of the present invention is achieved in that unidirectional fluid stopping device 1, it is primarily of mozzle 1-1, water conservancy diversion end socket 1-2, fluid stopping latex diaphragm 1-3 are formed; Its unidirectional fluid stopping device 1, is arranged on the capillary vessel 1-5 of connecting puncture needle and the connection end of tube for transfusion; Its overall appearance is that centre is comparatively thick, the circular geometry that two ends are thinner; Its thinner rear and front end is feed tube 1-1-1 and drain pipe 1-2-11 respectively; Feed tube 1-1-1 is connected with lower tube for transfusion tapered joint head 1-4; Drain pipe 1-2-11 is connected with capillary tube 1-5; Its structural relation is that mozzle 1-1 is made up of feed tube 1-1-1 and blower inlet casing 1-1-2; Water conservancy diversion end socket 1-2 one end and blower inlet casing 1-1-2 are assemblied in one, and the other end is the drain pipe 1-2-11 of unidirectional fluid stopping device 1; Unidirectional fluid stopping latex diaphragm 1-3 in blower inlet casing 1-1-2, between the fluid stopping latex diaphragm limiting stand 1-2-2 being assemblied in its nick arc fluid stopping sealing surface 1-1-2-4 and water conservancy diversion end socket 1-2.
Described mozzle 1-1, its feed tube 1-1-1 section is comparatively thin, is connected with the tapered joint head 1-4 of tube for transfusion, and its feed tube inlet 1-1-1-1 internal diameter is comparatively thick, is inwardly taper pipe laying 1-1-1-2 and its equal diameter pipeline 1-1-1-3; The tapered joint head 1-4 of its taper pipe laying and tube for transfusion matches; Feed tube 1-1-1 external diameter is equal, by the excessive section 1-1-1-4 in inclined-plane, is excessively blower inlet casing 1-1-2; Blower inlet casing 1-1-2 external diameter is comparatively thick, is respectively diversion cavity 1-1-2-1, pod apertures 1-1-2-2 in its shell, fluid stopping seal 1-1-2-3, nick arc sealing surface 1-1-2-4, diversion column stopper slot 1-1-2-5, diversion chamber 1-1-2-6, diversion chamber anchor ring 1-1-2-7, water conservancy diversion end socket installing port 1-1-2-8; Diversion cavity 1-1-2-1, by center equal diameter pipeline 1-1-1-3, is communicated with multiple pod apertures 1-1-2-2 of periphery and forms; The liquid outlet of pod apertures 1-1-2-2 is fluid stopping seal 1-1-2-3; Array distribution is on nick arc sealing surface 1-1-2-4 in the form of a ring for multiple fluid stopping seal 1-1-2-3, and itself and fluid stopping latex diaphragm 1-3 fit; The opposite side of fluid stopping latex diaphragm 1-2 is diversion chamber 1-1-2-6; The center of nick arc sealing surface 1-1-2-4 is fluid stopping latex film sheet post stopper slot 1-1-2-5; The port of blower inlet casing 1-1-2 is the installing port 1-1-2-7 of water conservancy diversion end socket 1-2.
Described water conservancy diversion end socket 1-2, it is by fluid stopping latex diaphragm limited post 1-2-1, fluid stopping latex diaphragm limiting stand 1-2-2, latex diaphragm position limiting pile 1-2-3, position limiting pile carrier side 1-2-4, end socket flow-guiding mouth 1-2-5, end socket pod apertures 1-2-6, end socket diversion cavity 1-2-7, end socket installs outer ring surface 1-2-8, mounting limit platform 1-2-9, the excessive section 1-2-10 in inclined-plane, drain pipe 1-2-11, fluid pipeline 1-2-12, liquid outlet 1-2-13 are formed; Fluid stopping latex diaphragm limited post 1-2-1, penetrate in the center spacing hole 1-3-1 of fluid stopping latex diaphragm 1-3 during installation, its termination embeds in fluid stopping latex diaphragm stopper slot 1-1-2-5, and fluid stopping latex diaphragm limiting stand 1-2-2 is pressed in the centre of fluid stopping latex diaphragm 1-3; The extension of fluid stopping latex diaphragm limiting stand 1-2-2 is diaphragm position limiting pile 1-2-3, and latex diaphragm position limiting pile 1-2-3 is positioned on position limiting pile carrier side 1-2-4, and it is structure as a whole; In the carrier side of latex diaphragm position limiting pile 1-2-3 periphery, array has multiple end socket flow-guiding mouth 1-2-5 in the form of a ring, and end socket flow-guiding mouth 1-2-5 is the inlet of end socket pod apertures 1-2-6 and is attached thereto logical; Multiple end socket pod apertures 1-2-6 is connected with the fluid pipeline 1-2-12 at center, and form end socket diversion cavity 1-2-7, the medicinal liquid in end socket diversion cavity 1-2-7 flows to fluid pipeline 1-2-12, flows out from liquid outlet 1-2-13; The installation outer ring surface 1-2-8 of water conservancy diversion end socket 1-2, embed when assembling in the water conservancy diversion end socket installing port 1-1-2-8 of diversion shell 1-1-2, mounting limit platform 1-2-9 and end socket installing port 1-1-2-8 fits tightly; Drain pipe 1-2-11 is connected with capillary vessel 1-5.
Described unidirectional fluid stopping diaphragm 1-3, it is thinner latex flat circle laminated structure, and by mounting limit hole, center 1-3-1, the unilateral 1-3-2 of latex film, latex diaphragm outer ring surface 1-3-3 is formed; In assembly, the dress spacing hole 1-3-1 that wherein feels at ease is sleeved on fluid stopping diaphragm limited post 1-2-1, mounting limit hole, center 1-3-1 periphery pressing diaphragm is below fluid stopping latex diaphragm limiting stand 1-2-2, one side of the unilateral 1-3-2 of latex film fits on nick arc sealing surface 1-1-2-4, another side is positioned at diversion chamber 1-1-2-6, the diameter of latex diaphragm outer ring surface 1-3-3 is equal with the internal diameter of diversion chamber anchor ring 1-1-2-7, and formation is sealed and matched
Beneficial effect:
Structure of the present invention is simple, easily manufactures, low cost of manufacture; Latex good springiness sealing fluid stopping is effective; The soft resistance of quality is little, and liquid medicine flow is smooth and easy; Avoid transfusion blood back phenomenon, make transfusion safer; Decrease medical personnel's fruitless labour, improve nursing service quality; Decrease because blood back blood coagulation is punctured the misery brought to patient again, save transfusion puncture needle head.
Accompanying drawing illustrates:
Fig. 1 is that unidirectional fluid stopping device front view also can be used as to select and wants accompanying drawing.
Fig. 2 unidirectional fluid stopping device sectional view.
Fig. 3 is draft tube structure figure.
Fig. 4 latex diaphragm figure.
Fig. 5 is water conservancy diversion end socket front view.
Fig. 6 water conservancy diversion end socket side view.
1 unidirectional fluid stopping device
1-1 mozzle
1-1-1 feed tube
1-1-1-1 feed tube inlet
1-1-1-2 taper pipe laying
1-1-1-3 equal diameter pipeline
The excessive section in 1-1-1-4 inclined-plane
1-1-2 blower inlet casing
1-1-2-1 diversion cavity
1-1-2-2 pod apertures
1-1-2-3 fluid stopping seal
1-1-2-4 nick arc sealing surface
1-1-2-5 diversion column stopper slot
1-1-2-6 diversion chamber
1-1-2-7 diversion chamber anchor ring
1-1-2-8 water conservancy diversion end socket installing port
1-2 water conservancy diversion end socket
1-2-1 fluid stopping latex diaphragm limited post
1-2-2 fluid stopping latex diaphragm limiting stand
1-2-3 latex diaphragm position limiting pile
1-2-4 position limiting pile carrier side
1-2-5 end socket flow-guiding mouth
1-2-6 end socket pod apertures
1-2-7 end socket diversion cavity
1-2-8 end socket installs outer ring surface
1-2-9 mounting limit platform
The excessive section in 1-2-10 inclined-plane
1-2-11 drain pipe
1-2-12 fluid pipeline
1-2-13 liquid outlet
1-3 fluid stopping latex diaphragm
1-3-1 center spacing hole
1-3-2 latex film is unilateral
1-3-3 latex diaphragm outer ring surface
1-4 tapered joint head
1-5 punctures capillary vessel
Specific embodiment
Constructive embodiment; The automatic unidirectional fluid stopping device 1 of venous transfusion provided by the present invention, it is by mozzle 1-1, water conservancy diversion end socket 1-2, and unidirectional fluid stopping latex diaphragm 1-3 is assembled, and the entirety of this assembly forms middle comparatively thick, the circular geometry outward appearance that two ends are thinner; Its thinner rear and front end is respectively feed tube 1-1-1 and drain pipe 1-2-12; In the present case, this assembly is arranged on the link of capillary vessel 1-5 and lower tube for transfusion taper connection end 1-4, and its thinner feed tube 1-1-1 is connected with tube for transfusion tapered joint head 1-4; Its thinner drain pipe 1-2-12 is connected with capillary vessel 1-5; This assembly also can be arranged on other any position of the tube for transfusion between the Murphy's dropper of disposable transfusion device and piercing needle; The mozzle 1-1 of unidirectional fluid stopping device 1, is made up of feed liquor connection tube 1-1-1 and blower inlet casing 1-1-2; Feed liquor connection tube 1-1-1 is the feed liquor link of unidirectional fluid stopping device 1; Equal diameter pipeline 1-1-1-3 is inwardly respectively, pod apertures 1-1-2-1 from input duct 1-1-1-2; Equal diameter pipeline 1-1-1-3 is communicated with multiple pod apertures 1-1-2-1, forms diversion cavity 1-1-2-2; Water conservancy diversion aperture 1-1-2-3 is diversion cavity 1-1-2-2 liquid outlet, is also fluid stopping seal; Multiple fluid stopping seal 1-1-2-3 is distributed on nick arc fluid stopping sealing surface 1-1-2-4 in the form of a ring, nick arc fluid stopping sealing surface 1-1-2-4 is forward diversion chamber 1-1-2-6, has latex fluid stopping diaphragm 1-3 interval between diversion chamber 1-1-2-6 and nick arc sealing surface 1-1-2-4; Latex fluid stopping diaphragm 1-3, one-way sealing fluid stopping seal 1-1-2-3; Diversion chamber 1-1-2-5, by the end socket flow-guiding mouth 1-2-5 on diaphragm position limiting pile carrier side 1-2-4, is communicated with multiple end socket pod apertures 1-2-6; Multiple end socket pod apertures 1-2-6 is communicated with fluid pipeline 1-2-12, forms end socket diversion cavity 1-2-7; The fluid pipeline 1-2-12 of end socket diversion cavity 1-2-7 is communicated with capillary vessel 1-5.
In infusion process, medicinal liquid flows in diversion cavity 1-1-2-1 from feed tube 1-1-1; Under pressure, push unidirectional fluid stopping latex diaphragm 1-3 open, flow in diversion chamber 1-1-2-6; Pass through end socket flow-guiding mouth 1-2-5 from diversion chamber 1-1-2-6 again, flow in end socket diversion cavity 1-2-7; Flow out from the fluid pipeline 1-2-12 be communicated with it again; The flow channel of medicinal liquid in unidirectional fluid stopping device 1 is unimpeded; Unidirectional fluid stopping latex diaphragm 1-3 quality is soft, elasticity is good, when medicinal liquid flows to liquid outlet 1-2-13 direction, only need small mobilization force, unidirectional fluid stopping latex diaphragm 1-3 bending forward can be promoted, leave nick arc sealing surface 1-1-2-4, open flow channel, make liquid medicine flow unblocked; When medicinal liquid stop flowing time, the unidirectional fluid stopping diaphragm of latex under the effect of its own resilient, reinstatement, the fluid stopping seal 1-1-2-3 on airtight nick arc sealing surface 1-1-2-4; When medicinal liquid reflux, liquid medicine flow passages that latex unidirectional fluid stopping diaphragm is airtight, prevents medicinal liquid reflux, avoids the generation of reflux blood back phenomenon.
The present invention operates and uses simple, and because of itself and the union joint Integral design of puncture needle capillary soft tube, and small volume, imperceptible with the traditional disposable transfusion device of non-meticulous inspection user has anything to change, and does not change original use habit on using; Common disposable intravenous infusion set with unidirectional fluid stopping device capillary soft tube piercing needle with the use of, venous transfusion reflux blood back phenomenon can be solved.
Structure of the present invention is simple, injection moulding can be adopted to produce, one-shot forming; Its injection mold is simple, and can adopt and split multimode even note, batch production, meets supply; Automated assembly line can also be used to produce, reduce production cost, improve output, save labour force etc.
Claims (2)
1. the unidirectional fluid stopping device (1) of venous transfusion, is characterized in that: it is by mozzle (1-1), water conservancy diversion end socket (1-2), and unidirectional fluid stopping diaphragm (1-3) is formed, unidirectional fluid stopping device (1), is arranged on the capillary vessel (1-5) of connecting puncture needle and the connection end of tube for transfusion, its overall appearance is that centre is comparatively thick, the circular geometry that two ends are thinner, its thinner rear and front end is feed tube (1-1-1) and drain pipe (1-2-11) respectively, feed tube (1-1-1) is connected with lower tube for transfusion tapered joint head (1-4), drain pipe (1-2-11) is connected with capillary vessel 1-5, its structural relation is that mozzle (1-1) is made up of feed liquor connection tube (1-1-1) and blower inlet casing (1-1-2), water conservancy diversion end socket (1-2) one end and blower inlet casing (1-1-2) are assemblied in one, and the other end is the drain pipe (1-2-11) of unidirectional fluid stopping device (1), unidirectional fluid stopping latex diaphragm (1-3), in water conservancy diversion shell (1-1-2), is assemblied between its nick arc fluid stopping sealing surface (1-1-2-4) and fluid stopping diaphragm limiting stand (1-2-2) of water conservancy diversion end socket (1-2), the mozzle (1-1) of the unidirectional fluid stopping device (1) of venous transfusion, its feed tube (1-1-1) section is thinner, be connected with the tapered joint head (1-4) of tube for transfusion, its feed tube inlet (1-1-1-1) internal diameter is comparatively thick, is inwardly taper pipe laying (1-1-1-2) and its equal diameter pipeline (1-1-1-3), the tapered joint head (1-4) of its taper pipe laying and tube for transfusion matches, feed tube (1-1-1) external diameter is equal, by the excessive section in inclined-plane (1-1-1-4), is excessively blower inlet casing (1-1-2), blower inlet casing (1-1-2) external diameter is thicker, diversion cavity (1-1-2-1) is respectively in its shell, pod apertures (1-1-2-2), fluid stopping seal (1-1-2-3), nick arc sealing surface (1-1-2-4), diversion column stopper slot (1-1-2-5), diversion chamber (1-1-2-6), diversion chamber's anchor ring (1-1-2-7), water conservancy diversion end socket installing port (1-1-2-8), diversion cavity (1-1-2-1), by center equal diameter pipeline (1-1-1-3), is communicated with multiple pod apertures (1-1-2-2) of periphery and forms, the liquid outlet of pod apertures (1-1-2-2) is fluid stopping seal (1-1-2-3), array distribution is on nick arc sealing surface (1-1-2-4) in the form of a ring for multiple fluid stopping seal (1-1-2-3), and itself and fluid stopping latex diaphragm (1-3) fit, the opposite side of fluid stopping latex diaphragm (1-2) is diversion chamber (1-1-2-6), and the center of nick arc sealing surface (1-1-2-4) is fluid stopping latex film sheet post stopper slot (1-1-2-5), the port of blower inlet casing (1-1-2) is the installing port (1-1-2-7) of water conservancy diversion end socket (1-2), the water conservancy diversion end socket (1-2) of the unidirectional fluid stopping device (1) of venous transfusion, it is by fluid stopping latex diaphragm limited post (1-2-1), fluid stopping latex diaphragm limiting stand (1-2-2), latex diaphragm position limiting pile (1-2-3), position limiting pile carrier side (1-2-4), end socket flow-guiding mouth (1-2-5), end socket pod apertures (1-2-6), end socket diversion cavity (1-2-7), end socket installs anchor ring (1-2-8), mounting limit platform (1-2-9), the excessive section in inclined-plane (1-2-10), drain pipe (1-2-11), fluid pipeline (1-2-12), liquid outlet (1-2-13) is formed, fluid stopping latex diaphragm limited post (1-2-1), penetrate in the center spacing hole (1-3-1) of fluid stopping latex diaphragm (1-3) during installation, its termination embeds in fluid stopping latex diaphragm stopper slot (1-1-2-5), and fluid stopping latex diaphragm limiting stand (1-2-2) is pressed in the centre of fluid stopping latex diaphragm (1-3), the extension of fluid stopping latex diaphragm limiting stand (1-2-2) is latex diaphragm position limiting pile (1-2-3), and latex diaphragm position limiting pile (1-2-3) is positioned on position limiting pile carrier side (1-2-4), and it is structure as a whole, in the carrier side that latex diaphragm position limiting pile (1-2-3) is peripheral, array has multiple end socket flow-guiding mouth (1-2-5) in the form of a ring, and end socket flow-guiding mouth (1-2-5) is the inlet of end socket pod apertures (1-2-6) and is attached thereto logical, multiple end socket pod apertures (1-2-6) is connected with the fluid pipeline (1-2-12) at center, form end socket diversion cavity (1-2-7), medicinal liquid in end socket diversion cavity (1-2-7) flows to fluid pipeline (1-2-12), flows out from liquid outlet (1-2-13), the installation outer ring surface (1-2-8) of water conservancy diversion end socket (1-2), embed when assembling in the water conservancy diversion end socket installing port (1-1-2-8) of blower inlet casing (1-1-2), mounting limit platform (1-2-9) and end socket installing port (1-1-2-8) fit tightly, drain pipe (1-2-11) is connected with capillary vessel (1-5).
2. the unidirectional fluid stopping device (1) of venous transfusion according to claim 1, it is characterized in that: unidirectional fluid stopping latex diaphragm (1-3) is thinner latex flat circle laminated structure, by mounting limit hole, center (1-3-1), latex film unilateral (1-3-2), latex diaphragm outer ring surface (1-3-3) is formed; In assembly, dress spacing hole (1-3-1) of wherein feeling at ease is sleeved on fluid stopping latex diaphragm limited post (1-2-1), mounting limit hole, center (1-3-1) periphery pressing diaphragm is below fluid stopping latex diaphragm limiting stand (1-2-2), one side of latex film unilateral (1-3-2) fits on nick arc sealing surface (1-1-2-4), another side is positioned at diversion chamber (1-1-2-6), the diameter of latex diaphragm outer ring surface (1-3-3) is equal with the internal diameter of diversion chamber's anchor ring (1-1-2-7), and formation is sealed and matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210353381.2A CN103656781B (en) | 2012-09-21 | 2012-09-21 | The unidirectional fluid stopping device of a kind of venous transfusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210353381.2A CN103656781B (en) | 2012-09-21 | 2012-09-21 | The unidirectional fluid stopping device of a kind of venous transfusion |
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| Publication Number | Publication Date |
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| CN103656781A CN103656781A (en) | 2014-03-26 |
| CN103656781B true CN103656781B (en) | 2016-03-16 |
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| CN201210353381.2A Expired - Fee Related CN103656781B (en) | 2012-09-21 | 2012-09-21 | The unidirectional fluid stopping device of a kind of venous transfusion |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106668977A (en) * | 2016-12-28 | 2017-05-17 | 天津哈娜好医材有限公司 | Check valve used for infusion apparatus and use method of check valve |
| CN106492306A (en) * | 2016-12-28 | 2017-03-15 | 天津哈娜好医材有限公司 | Transfusion device back-flow preventer and its using method |
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| US4535820A (en) * | 1984-05-24 | 1985-08-20 | Burron Medical Inc. | Normally closed check valve |
| US4610275A (en) * | 1985-11-04 | 1986-09-09 | Beecher William H | Valve for relieving pressure or checking reverse flow |
| DE3922291C1 (en) * | 1989-07-06 | 1990-11-08 | Pfrimmer-Viggo Gmbh & Co Kg, 8520 Erlangen, De | Medical non-return valve - has diaphragm moved against lip seal around valve axis |
| EP0947752A1 (en) * | 1998-03-30 | 1999-10-06 | Medex | Threshold valve |
| CN201267678Y (en) * | 2008-07-18 | 2009-07-08 | 上海双鸽实业有限公司 | Disposal one-way valve for infusion |
| CN202270260U (en) * | 2011-09-19 | 2012-06-13 | 上海美华医疗器具股份有限公司 | General anti-countercurrent valve |
| CN202761808U (en) * | 2012-09-21 | 2013-03-06 | 郑州昊能科技有限公司 | Single-way stop-flowing device for venous transfusion |
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2012
- 2012-09-21 CN CN201210353381.2A patent/CN103656781B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535820A (en) * | 1984-05-24 | 1985-08-20 | Burron Medical Inc. | Normally closed check valve |
| US4610275A (en) * | 1985-11-04 | 1986-09-09 | Beecher William H | Valve for relieving pressure or checking reverse flow |
| DE3922291C1 (en) * | 1989-07-06 | 1990-11-08 | Pfrimmer-Viggo Gmbh & Co Kg, 8520 Erlangen, De | Medical non-return valve - has diaphragm moved against lip seal around valve axis |
| EP0947752A1 (en) * | 1998-03-30 | 1999-10-06 | Medex | Threshold valve |
| CN201267678Y (en) * | 2008-07-18 | 2009-07-08 | 上海双鸽实业有限公司 | Disposal one-way valve for infusion |
| CN202270260U (en) * | 2011-09-19 | 2012-06-13 | 上海美华医疗器具股份有限公司 | General anti-countercurrent valve |
| CN202761808U (en) * | 2012-09-21 | 2013-03-06 | 郑州昊能科技有限公司 | Single-way stop-flowing device for venous transfusion |
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