CN102813984B

CN102813984B - Disposable self-exhaust two-way self-closed liquid-stop blood return-prevention infusion apparatus

Info

Publication number: CN102813984B
Application number: CN201210282059.5A
Authority: CN
Inventors: 雷冰
Original assignee: Sichuan Puruisi Biological Science & Technology Co Ltd
Current assignee: Sichuan Puruisi Biological Science & Technology Co Ltd
Priority date: 2012-08-09
Filing date: 2012-08-09
Publication date: 2014-05-07
Anticipated expiration: 2032-08-09
Also published as: CN102813984A

Abstract

The invention relates to a disposable self-exhaust two-way self-closed liquid-stop blood return-prevention infusion apparatus, which comprises an upper infusion catheter, a dropping funnel and a lower infusion catheter and is characterized in that the lower part of the dropping funnel is provided with a valve port; a check ring and a floating body are arranged in the dropping funnel; the floating body is provided with a lower liquid-stop plate; the lower liquid-stop plate and the valve port are matched to realize sealing; and the check ring on the floating body is matched with a retainer ring to realize spacing. The disposable self-exhaust two-way self-closed liquid-stop blood return-prevention infusion apparatus has the positive effects that when normal infusion is performed, an infusion process cannot be influenced at all, and after liquid is infused, the floating body can be lowered along with the lowering of the level of the liquid in the dropping funnel, and an upper liquid-stop plate at the lower end of the floating body can be matched with the valve port to realize closing to prevent the air from entering the dropping funnel, thus, medical negligence cannot occur. When liquid enters the dropping funnel again, as long as a pusher is extruded, the floating body can smoothly float again, but before the disposable self-exhaust two-way self-closed liquid-stop blood return-prevention infusion apparatus is invented, the process is fairly complicated. More important, when the dropping funnel is arranged at a low position, the upper liquid-stop plate can be matched with the retainer ring to realize reverse closing.

Description

Disposable use stops liquid blood return preventing infusion device from aerofluxus bidirectional self-sealing enclosed

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 aerofluxus bidirectional self-sealing enclosed, 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 aerofluxus bidirectional self-sealing enclosed, 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, on buoyancy aid, be provided with down only liquid sheet; Only liquid sheet and valve port coordinate realization sealing down; Baffle ring on buoyancy aid and back-up ring cooperation realize spacing.

Optimize, on baffle ring, be provided with only liquid sheet.

Optimize, above only the top in liquid sheet cross section is circular-arc; Adapt, the bottom in back-up ring cross section is circular-arc;

Optimize, between valve port and lower transfusion catheter, be provided with pusher.

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, buoyancy aid in dropping funnel can be subject to buoyancy, swim in the liquid in dropping funnel, can there is not any impact to infusion process, after liquid is totally lost, buoyancy aid can decline and reduce along with the page of the liquid in dropping funnel, and the upper only liquid sector-meeting of its lower end and valve port coordinate realizes sealing, prevents from that air from entering to cause malpractice.While again entering liquid in dropping funnel, only need extruding pusher, just can allow buoyancy aid again floating 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, above only liquid sector-meeting and back-up ring coordinate and realize oppositely sealing.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention 1;

Fig. 2 is the component diagram in Fig. 1;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is the A-A generalized section of Fig. 3;

Fig. 5 is the generalized section of the back-up ring in embodiment 1;

Fig. 6 is the structural representation of embodiment 2;

Fig. 7 is the structural representation of embodiment 3;

Fig. 8 is the structural representation of embodiment 4;

Fig. 9 is the structural representation of embodiment 5;

Figure 10 is the structural representation of embodiment 6.

The specific embodiment

Embodiment 1:

During normal infusion, liquid enters dropping funnel 11 from upper transfusion catheter 1, then from the valve port 12 of dropping funnel 11 bottoms to transfusion catheter 13, then by entry needle, enter human body.

In this process, in dropping funnel 11, 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, buoyancy aid 4 is just bathed in this liquid the inside.

Buoyancy aid 4 is subject to the buoyancy of liquid, floating, thus to the channel of normal infusion without any obstruction.Meanwhile, we can not allow this floating behavior depart from and control, so, on the inwall of dropping funnel 11, be provided with back-up ring 3, on buoyancy aid 4, there is baffle ring 14, in fact back-up ring 3 is exactly the Floating Height of having controlled baffle ring 14.

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 11 reduces gradually, simultaneously, buoyancy aid 4 also can be along with reduction, down only liquid sheet 6 from valve port 12 more and more close to, final, before liquid flows to end, only liquid sheet 6 has sealed valve port 12 down, no matter be liquid or air, all can not have entered lower transfusion catheter 7, patient does not have the risk of input air.

When fortuitous event appears in transfusion device, such as falling or placing not at that time, dropping funnel 11 highly can be lower than patient's health height, and at this moment, the flow direction of the liquid in dropping funnel 11 will reverse: by dropping funnel 11 lower ends, to upper end, flowed.Reason based on same, buoyancy aid 4 can move up, and baffle ring 14 can be drawn close to back-up ring 3, and the upper only liquid sheet 5 that we arrange also can be drawn close to back-up ring 3 until contact, and 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, upper only liquid sheet 5 and back-up ring 3 are all that the flexible material (as silica gel) adopting is made, and both contact surfaces are designed to circular arc.

Dosing mouth 2 is in order to add other drug design, the 7th, air filter.

Embodiment 2:

As shown in Figure 6, roughly the same with embodiment 1, difference is not arrange only liquid sheet 5, and oppositely sealing only relies on baffle ring 14 and back-up ring 3 to realize, and sealing effectiveness can differ from so certainly, and the present embodiment is only basic effect, can not reach optimum efficiency.

Embodiment 3:

As shown in Figure 7, with embodiment 1, compare with embodiment 2, difference is that baffle ring 14 shapes are had any different, at valve port 12, be arranged with pusher 9, the problem solving is: if liquid flows to end, only liquid sheet 6 contacts in closed state with valve port 12 down, when needs continue transfusion, hang up bottle, new liq enters in dropping funnel 11, in theory, all parts and action can reset, but but gone wrong, buoyancy aid 4 is without any the action resetting, its reason is: because size is limit, the buoyancy of buoyancy aid 9 designs is not enough to overcome the adhesive force between lower only liquid sheet 6 and valve port 12.

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 11, with partially liq, lower only liquid sheet 6 is pushed open from valve port 12, 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 9 of design very easily: pusher 9 is in fact a transition conduit (upper end is connected with valve port), with hands extruding pusher 9, it is to internal strain, make valve port 12 also to internal strain, just lower only liquid sheet 6 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 11 interior generations enters into pusher 9, pinch pusher 9 with hands, bubble will be moved upwards up on liquid level, has reached self-purging object.

Be worth explanation time, the present embodiment is the upper only liquid sheet 5 of design not equally, oppositely sealing is also basic realization, if realize best sealing effect, only need add and load onto only liquid sheet 5 at baffle ring 14, this just no longer repeats for embodiment.

Embodiment 4:

As shown in Figure 8, and implemented 4 similarly, difference is that the shape of pusher 9 changes to some extent, is changed into the connection with certain angle by rounding off, and its essential principle and using method are identical.In addition, the present embodiment is provided with only liquid sheet 5.

Embodiment 5:

As shown in Figure 9, similar to Example 4, difference is that difference is that baffle ring 14 shapes are distinguished to some extent.

Embodiment 5:

As shown in Figure 9, in the present embodiment, in order there to be better forward sealing effect, the area of valve port 12 is reduced, meanwhile, on lower only liquid valve, designed bulb and coordinated with it realization sealing.

Claims

1. disposable use stops liquid blood return preventing infusion device from aerofluxus bidirectional self-sealing enclosed, comprises transfusion catheter, dropping funnel, lower transfusion catheter, air filter, pusher, it is characterized in that: dropping funnel bottom is valve port; In dropping funnel, be provided with back-up ring and buoyancy aid, on buoyancy aid, be provided with down only liquid sheet; Only liquid sheet and valve port coordinate realization sealing down; Baffle ring on buoyancy aid and back-up ring cooperation realize spacing, are provided with only liquid sheet on baffle ring.

2. disposable use as claimed in claim 1 stops liquid blood return preventing infusion device from aerofluxus bidirectional self-sealing enclosed, it is characterized in that: above only the top in liquid sheet cross section is circular-arc; Adapt, the bottom in back-up ring cross section is circular-arc.