CN102908696A - Backflow liquid medicine filter for preventing blood return - Google Patents
Backflow liquid medicine filter for preventing blood return Download PDFInfo
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- CN102908696A CN102908696A CN 201110226302 CN201110226302A CN102908696A CN 102908696 A CN102908696 A CN 102908696A CN 201110226302 CN201110226302 CN 201110226302 CN 201110226302 A CN201110226302 A CN 201110226302A CN 102908696 A CN102908696 A CN 102908696A
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Abstract
The present invention relates to medical equipment, in particular to a backflow liquid medicine filter for preventing blood return, which is characterized in that the upper end of a connecting tube on an upper cover of the filter is closed, and a gas channel and a liquid channel are arranged in the connecting tube. An infusion apparatus is assembled by the backflow liquid medicine filter for preventing blood return, multi-stream gases in a dripping bucket are automatically exhausted through the gas channel, the liquid medicine flows out through the liquid channel for infusion, a backflow groove is formed on the outer wall of the connecting tube and communicated with the liquid channel through an infusion hole. When the liquid medicine flows through multiple layers of filtering membranes of the filter to block off the gas, the liquid is automatically stopped, the residue liquid in the dripping bucket is adsorbed to the liquid channel by the backflow groove and the micro infusion is maintained to achieve the effect of preventing the blood return. Therefore, the infusion apparatus assembled by the backflow liquid medicine filter for preventing blood return has the functions of automatic exhaust, automatic liquid stop and prevention of blood return at the same time.
Description
Technical field
The present invention relates to the category of medical apparatus and instruments, is a kind of adverse current blood return prevention liquid medicine filter.
Background technology
Existing transfusion device aerofluxus is difficult, and blood return prevention is more difficult, and this has been a long unsolved difficult problem since this.Have in recent years patent and the product of automatic vent, automatic liquid-stopping and blood return preventing infusion device, but these patents or product exist all many shortcomings to be difficult to carry out, be difficult to promote.
Chinese patent bubble-proof transfusion device (number of patent application 200720076629.X) proposes to establish an exhaustor in dropping funnel gas unnecessary in the dropping funnel is discharged automatically, but because transfusion and aerofluxus are at same passage, can only get rid of gas, the bubble that the gentle mixing of water forms then can not be got rid of.The transfusion device of automatic liquid-stopping is arranged both at home and abroad, and principle and the method for ending liquid are exactly the outlet that liquid has flowed rear autoshutdown dropping funnel, and gas can not enter downcomer, and the performance of automatic liquid-stopping is substantially reliable.But this series products all will carry out artificial aerofluxus by the operation of traditional product, only has the performance of automatic liquid-stopping.The product of many automatic liquid-stoppings all uses the title of blood return prevention or publicizes the performance of its blood return prevention, misreads to think and close that the blood of human vas just can't be back to transfusion device behind the downcomer, and this is wrong.Close the action of gravity of liquid in the rear tube eliminates because of downcomer, and the blood pressure of human body is greater than external air pressure, greater than the pressure in the transfusion device, so produce very soon blood back behind the automatic liquid-stopping, if untimely processing will produce thrombosis and stop up transfusion needle, deal with improperly and can cause malpractice.Not yet find to reach at present the transfusion device of blood return prevention effect.
Summary of the invention
The object of the present invention is to provide a kind of adverse current blood return prevention liquid medicine filter, the transfusion device of assembling with this filter has the function of automatic vent, automatic liquid-stopping and blood return prevention.
The object of the present invention is achieved like this: adverse current blood return prevention liquid medicine filter is comprised of base, loam cake and filter membrane.The connecting tube top closure of loam cake has two passages in the pipe, one be gas passage by steam vent be interlinked to the outside; Another is that fluid passage communicates with infusion hole, and steam vent is higher than infusion hole, and the outer wall of connecting tube has a width to be equal to or less than the counter-flow vat of 1mm, its upper end and infusion hole UNICOM.The filter membrane multilamellar, minimum two layers.Liquid medicine filter is the important component part of transfusion device, but existing liquid medicine filter only has the function of filtering liquid medicine, is assemblied in the terminal or dropping funnel of transfusion device.Adverse current blood return prevention liquid medicine filter then be assemblied in dropping funnel below, the connection stretch in the dropping funnel from the bottom of dropping funnel by pipe, the connection be equal to or greater than 10mm by the length of pipe in dropping funnel.The joint of base communicates with downcomer.During work, medicinal liquid enters dropping funnel unnecessary gas in the dropping funnel is got rid of automatically through steam vent, medicinal liquid enters downcomer and transfusion needle can be infused behind the liquid level closed grate hole after infusion hole, fluid passage, filter membrane filter, because gas passage and fluid passage separately avoid the gentle body of water to form bubble, even other factors are arranged, just in case intercepting bubble, can not pass through the multilayer filter membrane when bubble occurring after the medicinal liquid humidity, make it upwards enter dropping funnel from steam vent, still automatic vent and does not stop bubble to enter the double insurance of downcomer without bubble.When medicinal liquid has flowed when failing in time to process, because gas can not make downcomer sealing automatic liquid-stopping by filter membrane.End the debris in the dropping funnel behind the liquid under the adsorption of the surface tension of liquid and counter-flow vat, debris enters fluid passage through counter-flow vat and infusion hole.Because the very little liquid upruss of counter-flow vat, so flow velocity is extremely slow, flow is few, makes transfusion become trace and continues transfusion.Sustainable about 1 hour of 1-2 milliliter debris, micro-transfusion can prevent effectively that the body inner blood from refluxing to tube for transfusion.So the transfusion device with the assembling of adverse current blood return prevention liquid medicine filter has automatic vent without the function of bubble, Anti-bubble, automatic liquid-stopping and blood return prevention.
Adverse current blood return prevention liquid medicine filter of the present invention is comprised of base, loam cake and multiple filtration film, and the connecting tube of loam cake has gas passage and fluid passage, and the tube wall of connecting tube has a counter-flow vat, and is simple in structure.Can be used in conjunction with existing various transfusion devices, easily implement.
Description of drawings
Concrete structure of the present invention is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the profile of the adverse current blood return prevention liquid medicine filter of proposition according to the present invention.Fig. 2 is the profile with the transfusion device of adverse current blood return prevention liquid medicine filter assembling.
The specific embodiment
Below in conjunction with Fig. 1 and Fig. 2 details and the working condition that proposes according to the present invention is described.
Fig. 1 is adverse current blood return prevention liquid medicine filter, and it is comprised of base (1), loam cake (2) and filter membrane (3).The connecting tube of loam cake (4) has fluid passage (5) and gas passage (6), there is steam vent (9) upper end of gas passage, there is infusion hole (8) upper end of fluid passage, and the upper end of counter-flow vat (7) communicates with infusion hole (8).
Take Fig. 2 as example, transfusion device with the assembling of adverse current blood return prevention liquid medicine filter, the medicinal liquid that needle for inserting bottle during work (13) inserts medicinal fluid bag (not shown in FIG.) flows in the dropping funnel (11), and the filter membrane (3) that automatically gas unnecessary in the dropping funnel is passed down through liquid medicine filter through steam vent (9) and gas passage enters downcomer (12) and discharges.When medicinal liquid closed grate hole (9) is infused from downcomer (12) and transfusion needle (14) outflow after liquid medicine filter filters through filter membrane (3) owing to the action of gravity medicinal liquid enters through infusion hole (8), fluid passage (5).When medicinal liquid has flowed, fail in time to process or when changing medicinal fluid bag, moist multiple filtration film (3) is because the surface tension effects of medicinal liquid stops gas to pass through.Debris in the dropping funnel behind the automatic liquid-stopping (11) is adsorbed onto infusion hole (8) influent passage (5) continuation transfusion because of the surface tension effects counter-flow vat (7) of liquid with debris.Because counter-flow vat is with the debris adsorption and drainage that makes progress, be the extremely slow trace transfusion of speed, the debris of 1-2 milliliter can be kept about 1 hour.Owing to keeping transfusion state, keeping positive pressure energy to prevent that effectively the blood in the human body from refluxing to transfusion device, reaches the effect of blood return prevention in the transfusion device.Pushing dropping funnel (11) if need to continue to infuse behind the replacing medicinal fluid bag makes medicinal liquid flow into dropping funnel, flow into liquid medicine filter through infusion hole (8) and fluid passage (5) again, the gas in the filter enters dropping funnel (11) through gas passage (6) and steam vent (9).
So, cooperate the transfusion device of assembling with adverse current blood return prevention liquid medicine filter, have simultaneously the function of automatic vent, automatic liquid-stopping and blood return prevention.
Claims (4)
1. adverse current blood return prevention liquid medicine filter that is formed by base, filter membrane and loam cake, connecting tube (4) upper end closed that it is characterized in that loam cake, two passages are arranged in the pipe, gas passage (6) communicates with steam vent (9), fluid passage (5) communicates with infusion hole (8), connection has a counter-flow vat (7) by the outer wall of pipe, the upper end of counter-flow vat and infusion hole (8) UNICOM.
2. adverse current blood return prevention liquid medicine filter according to claim 1 is characterized in that filter membrane is multilamellar, minimum two layers.
3. adverse current blood return prevention liquid medicine filter according to claim 1, it is characterized in that adverse current blood return prevention liquid medicine filter is assemblied in the below of the dropping funnel (11) of transfusion device, connecting tube (4) is stretched in the dropping funnel from the bottom of dropping funnel, and the length in described dropping funnel is equal to or greater than 10mm.
4. adverse current blood return prevention liquid medicine filter according to claim 1, it is characterized in that adverse current blood return prevention liquid medicine filter is assemblied in dropping funnel (11) below of transfusion device, the joint (10) of base (1) is connected with the downcomer (12) of transfusion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226302 CN102908696A (en) | 2011-08-01 | 2011-08-01 | Backflow liquid medicine filter for preventing blood return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226302 CN102908696A (en) | 2011-08-01 | 2011-08-01 | Backflow liquid medicine filter for preventing blood return |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102908696A true CN102908696A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110226302 Pending CN102908696A (en) | 2011-08-01 | 2011-08-01 | Backflow liquid medicine filter for preventing blood return |
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| CN (1) | CN102908696A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977473A (en) * | 2014-05-16 | 2014-08-13 | 戎静华 | Automatic stopping infusion device provided with exhausting fluid storing tube and micro-flow-rate infusion tube |
| CN104189969A (en) * | 2014-05-24 | 2014-12-10 | 戎静华 | Automatic liquid-stopping infusion apparatus with novel exhaust liquid-storage tube |
| CN104888298A (en) * | 2015-03-24 | 2015-09-09 | 广州友安医疗科技有限公司 | Blood return prevention device and medical infusion apparatus |
| CN105194768A (en) * | 2015-11-02 | 2015-12-30 | 天津哈娜好兴达医用制品有限公司 | Filter drip chamber with automatic liquid stopping and automatic exhausting functions |
| CN114247006A (en) * | 2022-01-20 | 2022-03-29 | 上海协贮智能科技服务有限公司 | Infusion apparatus capable of automatically stopping liquid and preventing blood return |
-
2011
- 2011-08-01 CN CN 201110226302 patent/CN102908696A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977473A (en) * | 2014-05-16 | 2014-08-13 | 戎静华 | Automatic stopping infusion device provided with exhausting fluid storing tube and micro-flow-rate infusion tube |
| CN104189969A (en) * | 2014-05-24 | 2014-12-10 | 戎静华 | Automatic liquid-stopping infusion apparatus with novel exhaust liquid-storage tube |
| CN104888298A (en) * | 2015-03-24 | 2015-09-09 | 广州友安医疗科技有限公司 | Blood return prevention device and medical infusion apparatus |
| WO2016150319A2 (en) * | 2015-03-24 | 2016-09-29 | 广州友安医疗科技有限公司 | Device preventing backflow of blood, and medical infusion device |
| WO2016150319A3 (en) * | 2015-03-24 | 2017-02-09 | 广州友安医疗科技有限公司 | Device preventing backflow of blood, and medical infusion device |
| CN105194768A (en) * | 2015-11-02 | 2015-12-30 | 天津哈娜好兴达医用制品有限公司 | Filter drip chamber with automatic liquid stopping and automatic exhausting functions |
| CN105194768B (en) * | 2015-11-02 | 2019-05-03 | 普多邦兴达(天津)医疗科技有限公司 | With automatic liquid-stopping, self-bleeding filtering dropping funnel |
| CN114247006A (en) * | 2022-01-20 | 2022-03-29 | 上海协贮智能科技服务有限公司 | Infusion apparatus capable of automatically stopping liquid and preventing blood return |
| CN114247006B (en) * | 2022-01-20 | 2024-02-20 | 上海协贮智能科技服务有限公司 | Infusion apparatus capable of automatically stopping liquid and preventing blood return |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |