CN102813983B - Disposable self-exhausted bidirectional automatic-closing-type liquid-stop anti-blood-return transfusion device - Google Patents

Disposable self-exhausted bidirectional automatic-closing-type liquid-stop anti-blood-return transfusion device Download PDF

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Publication number
CN102813983B
CN102813983B CN201210282002.5A CN201210282002A CN102813983B CN 102813983 B CN102813983 B CN 102813983B CN 201210282002 A CN201210282002 A CN 201210282002A CN 102813983 B CN102813983 B CN 102813983B
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liquid
valve port
transfusion
closing
liquid sheet
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CN102813983A (en
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雷冰
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Sichuan Puruisi Biological Science & Technology Co Ltd
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Sichuan Puruisi Biological Science & Technology Co Ltd
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Abstract

The invention relates to a disposable self-exhausted bidirectional automatic-closing-type liquid-stop anti-blood-return transfusion device, which comprises an upper transfusion catheter, a drip chamber and a lower transfusion catheter. The transfusion device is characterized in that a valve port is arranged at the lower part of the drip chamber; an upper retaining ring and a floating body are arranged in the drip chamber, a closing assembly is arranged below the floating body, and the closing assembly comprises a fixed seat, an upper liquid-stop sheet and a lower liquid-stop sheet; a lower retaining ring is arranged on the inner wall of the drip chamber, and the lower retaining ring is arranged between the upper liquid-stop sheet and the lower liquid-stop sheet; the valve port is arranged at the middle part of the lower retaining ring and is respectively matched with the upper liquid-stop sheet and the lower liquid-stop sheet to realize closing; and a push device is arranged between the valve port and the lower transfusion catheter. The disposable self-exhausted bidirectional automatic-closing-type liquid-stop anti-blood-return transfusion device has the positive effects that when normal transfusion is conducted, the valve port is opened in two directions and any influence is not caused to the transfusion process; and after liquid is fully transfused, air is prevented from entering a human body and causing medical accidents; when liquid enters the drip chamber again, the push device is only needed to be squeezed and smooth restoration can be realized; and more importantly, when the drip chamber is placed at a low position, the lower liquid-stop sheet is matched with the valve port to realize reverse closing.

Description

Disposable use stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus
Technical field
The present invention relates to a kind of medical apparatus and instruments, specifically disposable infusion device.
Background technology
Transfusion device is mainly used in carrying medicinal liquid to patient, and its structure mainly comprises contact pin, upper transfusion catheter, dropping funnel, lower transfusion catheter; In use, after if the liquid on upper contact pin is totally lost, in the time of need to changing liquid, must be timely: before the liquid that store in dropping funnel has dripped, allow new liq enter into dropping funnel, otherwise can enter air in dropping funnel, thereby formation bubble, bubble can enter in lower transfusion catheter smoothly along with flowing of liquid, and bubble can enter human body by entry needle pin hole like this, thereby formation aeroembolism, physical and mental health and even the life security that when serious, can threaten patient.Meanwhile, the bubble producing during dropping liquid also likely enters human body.
For fear of above-mentioned situation, when practical application, medical worker, patient and entourage show great attention to the progress situation of transfusion, and nonetheless, the situation of error is still a lot.
In addition, also likely there is clinically the situation that another is dangerous: at ordinary times, patient's height is lower than the height of dropping funnel, under the effect of pressure, with regard to energy normal infusion.Once both take a turn for the worse at height relationships, dropping funnel is low while putting (such as falling), and equally due to pressure, the blood in patient body will enter dropping funnel along lower transfusion catheter.
Summary of the invention
The object of the invention is to provide a kind of disposable use and stops liquid blood return preventing infusion device to make up the deficiency of prior art from the two-way automatic closing type of aerofluxus, and this transfusion device can be realized and lack liquid or dropping funnel is low automatic bidirectional sealing while putting, thereby guarantees the safety of transfusion.
The present invention realizes the technical scheme that its object used to be:
Disposable use stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, comprises transfusion catheter, dropping funnel, lower transfusion catheter, it is characterized in that: dropping funnel bottom is valve port; In dropping funnel, be provided with back-up ring and buoyancy aid, buoyancy aid is arranged with sealing assembly, and sealing assembly comprises holder, above stops liquid sheet and stop down liquid sheet; On dropping funnel inwall, have lower back-up ring, lower back-up ring is at upper only liquid sheet and lower only between liquid sheet; Lower back-up ring middle part is valve port, and valve port is respectively with upper only liquid sheet, only liquid sheet is realized sealing down.
Optimize, between buoyancy aid and sealing assembly, mounting means is axial socket, and has axial free displacement between the two.
Optimize, between valve port and lower transfusion catheter, be provided with pusher.
Optimize, the density of sealing assembly is 0.98-1.02.
Optimize, above only liquid sheet and the lower only cross sectional shape of liquid sheet are circular arc, adapt, lower back-up ring the cross sectional shape of contact surface be up and down arc surface.
Optimize, above only liquid sheet and the lower only cross sectional shape of liquid sheet are straight line, adapt, lower back-up ring contact surface be up and down plane.
Optimize, pusher is the transition conduit between valve port and lower transfusion catheter, and the internal diameter of transition conduit is 0.1mm ~ 20mm.
Good effect of the present invention is: during normal infusion, sealing assembly in dropping funnel is suspended in the liquid in dropping funnel, valve port bidirectional opening, can there is not any impact to infusion process, after liquid is totally lost, sealing assembly can decline and reduce along with the page of the liquid in dropping funnel, and above only liquid sector-meeting and valve port coordinate and realize sealing, prevents from that air from entering to cause malpractice.While again entering liquid in dropping funnel, only need extruding pusher, just can reset smoothly, before the present invention occurs, this process is quite loaded down with trivial details.The more important thing is, when dropping funnel is low while putting, lower only liquid sector-meeting and valve port coordinate realizes oppositely sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the sealing assembly in Fig. 1;
Fig. 3 is the top view of Fig. 1;
Fig. 4 is lower back-up ring generalized section;
Fig. 5 is the structural representation of embodiment 2;
Fig. 6 is the structural representation of embodiment 3.
The specific embodiment
Embodiment 1:
As shown in Figures 1 to 4, during normal infusion, liquid enters dropping funnel 20 from upper transfusion catheter 1, then from the valve port 21 of dropping funnel 20 bottoms to transfusion catheter 13, then by entry needle, enter human body.
In this process, in dropping funnel 20, have all the time certain liquid and be used for completely cutting off air (this is also the original intention that designed originally it), in the present invention, sealing assembly (upper fixed seat 9, above only liquid sheet 4, lower fixed seat 12, only liquid sheet 5 and connecting rod 8 down) is just bathed in this liquid the inside.
Due to the sealing proportion of assembly and liquid phase with, so sealing assembly can be in suspended state, valve port 11 is in bidirectional opening state, thus to the channel of normal infusion without any obstruction.
The effect of buoyancy aid 7 is the axial wobble of restriction sealing assembly, and keeping sealing assembly is vertical moving up and down, thus be designed to telescopic connected mode, and there is no the effect of power between the two, there is the relative displacement of vertical direction.Upper back-up ring 3 is Floating Heights of restriction buoyancy aid 7.
Suppose, liquid has been totally lost, but no one notes, our invention just has following action: there is no entering of upper end liquid, the liquid levels in dropping funnel 20 reduces gradually, simultaneously, sealing assembly also can be along with reduction, upper only liquid sheet 4 from lower back-up ring 10 more and more close to, final, before liquid flows to end, upper only liquid sheet has sealed valve port 21, no matter be liquid or air, all can not have entered lower transfusion catheter 7, patient does not have the risk of input air.
At valve port 21, be arranged with pusher 11, the problem solving is: if liquid flows to end, upper only liquid sheet 4 contacts in closed state with valve port 21, when needs continue transfusion, hangs up bottle, new liq enters in dropping funnel 20, in theory, all parts and action can reset, but have but gone wrong, sealing assembly is without any the action resetting, and its reason is: above only the adhesive force between liquid sheet 4 and valve port 21 has hindered homing action.
Before the present invention occurs, for smooth reset, the indigenous method that medical personnel generally adopt is: the end that pinches lower transfusion catheter 13 with a hands, can't be near, more far better, another is pushing transfusion catheter 13, liquid in it is caught up with toward dropping funnel 20, with partially liq, upper only liquid sheet 4 is pushed open from valve port 21, can be imagined, this is that (pipe is very thin for the action of a suitable consumption power, intensity), nurse often strength is little again, so the consumption of time is also very long.
We just can address this problem by the pusher 11 of design very easily: pusher 11 is in fact a transition conduit (upper end is connected with valve port), with hands extruding pusher 11, it is to internal strain, make valve port 21 also to internal strain, just lower upper only liquid sheet 4 there is the direct effect of thrust, simultaneously the liquid in it also can have to upper only liquid sheet 4 effect of thrust, laborsavingly saves time again.
The another one effect of pusher 9: if the bubble of dropping funnel 20 interior generations enters into pusher 11, pinch pusher 11 with hands, bubble will be moved upwards up on liquid level, has reached self-purging object.
When fortuitous event appears in transfusion device, such as falling or placing not at that time, dropping funnel 20 highly can be lower than patient's health height, and at this moment, the flow direction of the liquid in dropping funnel 20 will reverse: by dropping funnel 20 lower ends, to upper end, flowed.Reason based on same, sealing assembly can move up, final, and lower only liquid sheet 5 has just sealed valve port 21, has so just realized reverse sealing, has stopped the generation of blood back phenomenon.
In order to obtain better oppositely sealing effect, in the present embodiment, above stopping liquid sheet 4, stopping liquid sheet 5 and lower back-up ring 10 is down all that the flexible material (as silica gel) adopting is made, and contact surface is designed to circular arc.
Dosing mouth 2 is in order to add other drug design, the 6th, air filter.
Embodiment 2:
As shown in Figure 5, roughly the same with embodiment 1, difference is that the shape of buoyancy aid 7 changes to some extent, and its essential principle and using method are identical.
Implement 3:
As shown in Figure 6, roughly the same with embodiment 1, difference is to stop liquid sheet 4, only the contact surface of liquid sheet 5 and lower back-up ring 10 is designed to planar shaped down.In addition, the shape of pusher 9 changes to some extent, and by being connected and changing the connection with certain angle into the direct rounding off of dropping funnel 20, its essential principle and using method are identical.

Claims (2)

1. disposable use stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, comprises transfusion catheter, dropping funnel, lower transfusion catheter, it is characterized in that: dropping funnel bottom is valve port; In dropping funnel, be provided with back-up ring and buoyancy aid, buoyancy aid is arranged with sealing assembly, and sealing assembly comprises holder, above stops liquid sheet and stop down liquid sheet; On dropping funnel inwall, have lower back-up ring, lower back-up ring is at upper only liquid sheet and lower only between liquid sheet; Lower back-up ring middle part is described valve port, and described valve port is respectively with upper only liquid sheet, only liquid sheet is realized sealing down; Between described valve port and lower transfusion catheter, be provided with pusher.
2. disposable use as claimed in claim 1 stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, it is characterized in that: between buoyancy aid and sealing assembly, mounting means is axial socket, and has axial free displacement between the two.
3. disposable use as claimed in claim 1 or 2 stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, it is characterized in that: the density of sealing assembly is 0.98g/cm 3-1.02g/cm 3.
4. disposable use as claimed in claim 1 stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, it is characterized in that: above only liquid sheet and the lower only cross sectional shape of liquid sheet are circular arc, adapt, and the cross sectional shape of contact surface up and down of lower back-up ring is arc surface.
5. disposable use as claimed in claim 1 stops liquid blood return preventing infusion device from the two-way automatic closing type of aerofluxus, it is characterized in that: above only liquid sheet and the lower only cross sectional shape of liquid sheet are straight line, adapt, and the contact surface up and down of lower back-up ring is plane.
CN201210282002.5A 2012-08-09 2012-08-09 Disposable self-exhausted bidirectional automatic-closing-type liquid-stop anti-blood-return transfusion device Active CN102813983B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105126191A (en) * 2015-08-19 2015-12-09 四川普瑞斯生物科技有限公司 Automatic exhausting, liquid-stopping and blood return-preventing drip chamber
CN105561448A (en) * 2016-01-06 2016-05-11 日日新知识产权投资温州有限公司 Liquid stopper
CN109481795B (en) * 2018-12-29 2023-12-19 四川普瑞斯生物科技有限公司 Double liquid-stopping self-exhausting safety dropping funnel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2039970U (en) * 1988-11-26 1989-06-28 方正国 Intravenous drip injector
US5234414A (en) * 1992-09-28 1993-08-10 Hung Yung Feng Automatically closed dripping apparatus for intravenous administration
CN2574689Y (en) * 2002-10-21 2003-09-24 韦元强 Transfusion warner
CN201286915Y (en) * 2008-10-04 2009-08-12 杨梅芳 Disposable self-closing liquid-keeping transfusion device with valve opening sac

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8480635B2 (en) * 2010-03-04 2013-07-09 Hsien-Tsung Wang Automatic intravenous fluid flow control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2039970U (en) * 1988-11-26 1989-06-28 方正国 Intravenous drip injector
US5234414A (en) * 1992-09-28 1993-08-10 Hung Yung Feng Automatically closed dripping apparatus for intravenous administration
CN2574689Y (en) * 2002-10-21 2003-09-24 韦元强 Transfusion warner
CN201286915Y (en) * 2008-10-04 2009-08-12 杨梅芳 Disposable self-closing liquid-keeping transfusion device with valve opening sac

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