CN102389603B - Automatic air discharging system of infusion device capable of preventing blood return - Google Patents
Automatic air discharging system of infusion device capable of preventing blood return Download PDFInfo
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- CN102389603B CN102389603B CN 201110387943 CN201110387943A CN102389603B CN 102389603 B CN102389603 B CN 102389603B CN 201110387943 CN201110387943 CN 201110387943 CN 201110387943 A CN201110387943 A CN 201110387943A CN 102389603 B CN102389603 B CN 102389603B
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- dropping funnel
- air
- exhaustor
- infusion device
- blood return
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Abstract
The invention discloses an automatic air discharging system of an infusion device capable of preventing blood return. The automatic air discharging system comprises a nozzle, a first air filter, a second air filter, a sealing plug and an air discharging pipe, and is characterized in that: the nozzle is located at the upper end of a dripping hopper cavity; the air discharging pipe is arranged in the dripping hopper cavity; a first end of the air discharging pipe is connected with the first air filter, and a second end of the air discharging pipe is connected with a dripping hopper wall and is provided with the sealing plug; a first waterproof air filtration membrane in the first air filter is located in a central region of a cylindrical cross section of a dripping hopper, and the highest point of the first waterproof air filtration membrane is located between 1/2 to 2/3 height of a dripping hopper pipe; and the second air filter provided with a second waterproof air filtration membrane is arranged between a lower infusion pipe and an external conical joint. According to the air discharging system and a special structure thereof, the air can be rapidly discharged automatically no matter whether the dripping hopper is in a violent shaking environment or not; when the dripping hopper is inclined or swung and air discharge is finished, the dripping speed can be persistently and well observed; and air entering the lower infusion pipe can also be automatically discharged.
Description
[affiliated technical field]
The present invention relates to the automatic exhaust system of disposable use blood return preventing infusion device, be particularly useful for blood return preventing infusion device.
[technical background]
Present blood return preventing infusion device automatic exhaust system, an or air filter is installed outside the sidewall of dropping funnel or is had the filter of sealing-plug, or cover at dropping funnel and to be connected to an air filter that extends into the exhaust needle in the dropping funnel below installing one.Air filtration film in the air filter is excessive when the aerofluxus in order to prevent the transfusion in the dropping funnel, so must select anti-dankness type for use.Though they can both realize dropping funnel aerofluxus fast automatically under general situation, but when under this dropping funnel is being in the environment of fierce vibrations, carrying out aerofluxus, because the transfusion in the dropping funnel both can produce a large amount of bubbles, can do fierce moving up and down again, variation has just taken place in their effect.Describedly be installed in the sort of gas extraction system that dropping funnel covers, when it before aerofluxus does not also finish, can be because above-mentioned former thereby make in the pipe of exhaust needle and just entered the transfusion that is mixed with gas, after the transfusion pillar in the aerofluxus needle tubing was positioned on the air pillar, this gas extraction system just can't aerofluxus.And described those the outer two kinds of gas extraction system of dropping funnel sidewall that are installed in, they when aerofluxus, though filter membrane lean against on the sidewall of dropping funnel, so the bubble of process can pass filter membrane to effluxing, because of the bubble of contact limited, so exhaust efficiency is also very poor.
In addition, above-mentioned those the outer two kinds of gas extraction system of dropping funnel sidewall that are installed in are when aerofluxus, if dropping funnel tilts, the opening that gas extraction system then is installed may be positioned at dropping funnel medium dip position up.Because the interface of the interior gas of dropping funnel, liquid is located in the horizontal plane at this opening point place topmost after the aerofluxus, the vertical dimension that splashes into pipe will shorten so liquid level is infused to the dropping funnel upper end, if tilt seriously will observe a speed.In addition, this dropping funnel, begins to tilt as this dropping funnel after aerofluxus finishes just perpendicular down, and the opening that gas extraction system is installed also is positioned at dropping funnel medium dip position up, and then this dropping funnel just can continue aerofluxus again, up to the transfusion liquid level rise to described opening flooded till.This dropping funnel might be observed again and drip speed like this.So, do not have the gas extraction system of sealing-plug just can't effectively control the position of gas, liquid interface, and this still is a defective that can not be ignored.Even gas extraction system has sealing-plug, can when aerofluxus, monitor the position of gas, liquid interface,, observe the function of dripping speed to prevent the dropping funnel forfeiture, but operation is simple inadequately in time with sealing-plug beyond the Great Wall.
In addition, in each above-mentioned gas extraction system, all do not arrange and get rid of the parts that enter down the air in the tube for transfusion, in case if the misoperation of blood return preventing infusion device and after causing down tube for transfusion air inlet, if this part air would not be got rid of and will be entered vein with transfusion and produce thrombosis and human body is worked the mischief.
[summary of the invention]
In order to overcome the deficiency described in above-mentioned each gas extraction system, the present invention provides a kind of new aerofluxus scheme to dropping funnel, the gas extraction system that it can make blood return preventing infusion device also has comparatively ideal exhaust effect when using in fiercenesses such as ambulance concussion place, and when dropping funnel finishes aerofluxus under the situation of knockdown or after finishing aerofluxus, dropping funnel still has the air space that speed is dripped in clear observation, as after causing the following tube for transfusion air inlet of blood return preventing infusion device owing to misoperation, can get rid of the gas of this part automatically in addition.
The invention provides a kind of blood return preventing infusion device automatic exhaust system, comprise dropping funnel in the described blood return preventing infusion device, following tube for transfusion, be installed in down liquid medicine filter or hollow capsule pipe in the tube for transfusion, be installed in down the outer cone joint of tube for transfusion tail end, it comprises first air filter the present invention, exhaustor, nozzle, it is characterized in that: described nozzle is installed in the cervical region of dropping funnel upper end, the mouth mouth of nozzle is arranged on the upper end in dropping funnel chamber, described first air filter and exhaustor all are arranged on the dropping funnel intracavity, the main body of described first air filter is connected in first end of described exhaustor, second end of described exhaustor and the wall of this dropping funnel join, the first waterproof air filtration film is housed on described first air filter, and the described first waterproof air filtration film places the middle section of the cylinder position cross section of described dropping funnel, and the peak of the first waterproof air filtration film place described dropping funnel pipe high 1/2nd to 2/3rds between.
As preferably: be provided with one or more first air filter in the dropping funnel, the one or more first waterproof air filtration film is housed on described first air filter.
Further preferred: as to be furnished with a sealing-plug at second end of described exhaustor, between second end of described sealing-plug and described exhaustor, also to be provided with a brace, between second end of described exhaustor and described sealing-plug, also be provided with a sealing ring.
Further preferred: the opening of establishing on second end of described exhaustor and the dropping funnel sidewall joins.
Further preferred: the opening of establishing on second end of described exhaustor and the dropping funnel roof joins.
Further preferred: the opening of establishing on second end of described exhaustor and the dropping funnel diapire joins.
Further preferred: the cover plate at described liquid medicine filter is installed one or more second air filter.
Further preferred: one or more second air filter of installation above the containing cavity above described outer cone joint herb liquid filter membrane.
Further preferred: one or more second air filter is installed at middle and upper part or top at described hollow capsule pipe.
Further preferred: as to have one or more second waterproof air filtration films in described second air filter, have the protection cover plate in the outside of the second waterproof air filtration film, have one or more steam vent at the protection cover plate.
Beneficial effect: all very good no matter whether 1 dropping funnel fierceness shakes exhaust effect.The first waterproof air filtration film places the middle section of dropping funnel cylinder position cross section in this programme, so when dropping funnel fierce rocking occur and makes when being mixed with a large amount of bubbles in the transfusion it in and doing the moving up and down of fierceness, the first waterproof air filtration film can be directly and is touched these bubbles in a large number, does not influence exhaust effect; If the not fierce vibrations of dropping funnel, what the first waterproof air filtration film touched before finishing aerofluxus so nearly all is air, air with will be automatically to effluxing after the first waterproof air filtration film contacts.So the aerofluxus theory of this programme is even more ideal with respect to those several classes in the background technology.2, get rid of the air that enters down in the tube for transfusion automatically.In this programme, down be provided with second air filter between tube for transfusion and the outer cone joint, it just can be got rid of automatically owing to misoperation enters down air in the tube for transfusion, has avoided gas to enter vein and causes the danger of thrombosis.3, dropping funnel continues to observe a speed.After the dropping funnel run-off the straight, the transfusion liquid level will be that a side shortens to the vertical dimension at nozzle mouth mouth place in the dropping funnel, and a side is elongated.The first waterproof air filtration film of this programme just places the middle section of dropping funnel cylinder position cross section, and this regional liquid level is little to the amplitude of variation of the vertical dimension at nozzle mouth mouth place.Because the dropping funnel automatic vent is because the first waterproof air filtration film is positioned on the liquid level of dropping funnel, so the position that this filter membrane was positioned on the liquid level after dropping funnel tilted is few, be not always the case even dropping funnel is horizontal, so can not cause effluxing of the interior a large amount of gases of dropping funnel, and make the excessive transfusion of suction in the dropping funnel.Again because the peak control of the first waterproof air filtration film in this programme the dropping funnel pipe high 1/2nd to 2/3rds between, so such design can not make dropping funnel lack the space that the air of fast usefulness is dripped in enough observations.In like manner, after aerofluxus finished, dropping funnel tilted or rocks, and the liquid level that also can not cause infusing in the dropping funnel significantly rises and makes the dropping funnel forfeiture observe the function of dripping speed.The present invention also is provided with a sealing-plug at dropping funnel in addition, so after the dropping funnel aerofluxus finishes, if be in when using on the fierce ambulance that shakes, can also be sealing-plug beyond the Great Wall, make dropping funnel beginning aerofluxus and cause the rising significantly of transfusion water level in it when aerofluxus again to occur bubble again in avoiding infusing.Therefore this programme can guarantee that dropping funnel has a function that continues an observation speed.
[Figure of description]
It is diagram one of the present invention that a kind of automatic exhaust system shown in Figure 1 is used for blood return preventing infusion device
It is diagram two of the present invention that a kind of automatic exhaust system shown in Figure 2 is used for blood return preventing infusion device
It is diagram three of the present invention that a kind of automatic exhaust system shown in Figure 3 is used for blood return preventing infusion device
[specific embodiment]
Embodiment one,
A kind of automatic exhaust system as shown in Figure 1 is used for blood return preventing infusion device, and dropping funnel 1 top is provided with dropping funnel lid 1A, and at nozzle 2 of cervical region connection of dropping funnel lid 1A, the mouth mouth 2A of nozzle 2 is arranged on the upper end in dropping funnel chamber.First air filter 4 and exhaustor 3 all are arranged on the dropping funnel intracavity.1A offers the second end 3A that an openning connects exhaustor 3 at the dropping funnel lid.The second end 3A at exhaustor 3 is furnished with a sealing-plug 5.Between the inwall of the second end 3A of sealing-plug 5 and exhaustor 3, be provided with a sealing ring 6, between the second end 3A of exhaustor 3 and sealing-plug 5, also be provided with a brace 5A.Exhaustor 3 pastes along the inwall of dropping funnel 1 and stretches into the dropping funnel intracavity, extend into dropping funnel 1 pipe high 1/2nd to 2/3rds between the time level of turning round extend towards the middle section of dropping funnel 1.Open Side Down and extend to form the main body of one or more first air filter 4 again for the first end 3B of exhaustor 3, first air filter 4 be shaped as cylinder or spherosome or hemisphere or globoid or circle hat body or bullet.The one or more first waterproof air filtration film 4A also is housed on the surface of first air filter 4, the first waterproof air filtration film 4A is positioned at the middle section of the cylinder position cross section of dropping funnel 1, and the peak of first waterproof air filtration film 4A control the pipe of dropping funnel 1 high 1/2nd to 2/3rds between.The first waterproof air filtration film is fitted on its main body closely by the method for ultrasonic or heat seal or gummed, has or there are linear mediastinum or grid in both sides in a side of filter membrane.
Below dropping funnel 1, be connected with tube for transfusion 7 down, be connected to an outer cone joint 9 in the lower end of following tube for transfusion 7.In the cone joint 9, installation is one or more above the containing cavity above being positioned at liquid medicine filtering membrane 9A both can make air filter, can make second air filter 8 of the upper cover plate of outer cone joint again outside.The one or more second waterproof air filtration film 8A is housed in second air filter 8; the outside at the second waterproof air filtration film 8A is provided with a block protection cover plate; filter membrane is covered; on the protection cover plate, also be provided with one or more steam vent 8B, intermittently chamber is arranged between protection cover plate and the second waterproof air filtration film 8A.
Operational approach:
Confirm that earlier sealing-plug 5 opens errorlessly, again this blood return preventing infusion device and infusion bottle joined that the air in the dropping funnel 1 just begins by the first waterproof air filtration film 4A also to suck the transfusion of equivalent simultaneously to effluxing from infusion bottle.The transfusion that sucks sprays to the inwall of dropping funnel 1 earlier by the mouth mouth 2A of nozzle 2, again to dirty, avoided directly dropping on the filter membrane and influence exhaust efficiency.The transfusion that sucks has only sub-fraction to enter down tube for transfusion 7 downwards, so the transfusion in the dropping funnel 1 is constantly gathered, when liquid level rises to when this filter membrane flooded fully, aerofluxus just stops automatically.After aerofluxus begins, if the situation that dropping funnel 1 occurs tilting and rocks, because the first waterproof air filtration film is arranged on the middle section of dropping funnel cylinder position cross section, so be located at and dropping funnel lacked observe a space of dripping speed after aerofluxus no matter connect the opening of second end of exhaustor 3 on the dropping funnel, sealing-plug 5 also need not be beyond the Great Wall after the aerofluxus end.If dropping funnel is under the environment of fierce vibrations during aerofluxus, ought see that so the bubble in the transfusion is fewer and feweri in the dropping funnel, when just looking at liquid level and being raised to the top of filter membrane just at once with sealing-plug 5 beyond the Great Wall.So just can avoid in the dropping funnel occurring bubble again in the transfusion and continue aerofluxus and water level is risen, guarantee to have in the dropping funnel and observe a space of dripping speed.Other operation is the same with the operation of disposable use blood return preventing infusion device.
After transfusion is dripped to the greatest extent, ending liquid film and can stop transfusion to enter down tube for transfusion 7 in the dropping funnel 1, but after overtime, do not go timely to handle as the nurse, only liquid film will be lost the effect that ends liquid, and following tube for transfusion 7 enters air thereupon.Owing on the cone joint 9 second air filter 8 that includes the second waterproof air filtration film is housed outside, so when air enters outer cone joint 9 after, air is eliminating automatically just, has avoided air to enter human body and caused the hidden danger of thrombosis.
During the changing-over infusion bottle, earlier blood return preventing infusion device is shifted out in old bottle, is linked in the new bottle, if sealing-plug 5 by beyond the Great Wall just open it, what be opened just keeps intact, dropping funnel 1 will have been finished aerofluxus automatically.After aerofluxus finished, sealing-plug 5 was kept intact if dropping funnel is among the environment that does not have fierce vibrations; If be among the environment of fierce vibrations, just at once with sealing-plug 5 beyond the Great Wall.Other operation is the same with disposable use blood return preventing infusion device.
Embodiment two,
A kind of automatic exhaust system as shown in Figure 2 is used for blood return preventing infusion device, and the cervical region in dropping funnel 1 upper end connects a nozzle 2, and the mouth mouth 2A of nozzle 2 is arranged on the upper end in dropping funnel chamber.First air filter 4 and exhaustor 3 all are arranged on the dropping funnel intracavity.On the sidewall of dropping funnel 1, be positioned at dropping funnel 1 pipe high 1/2nd to 2/3rds between the position offer the second end 3A that an openning connects exhaustor 3, connect a sealing-plug 5 at the second end 3A of exhaustor 3.Between the inwall of sealing-plug 5 and exhaustor 3 second end 3A, be provided with a sealing ring 6, between the second end 3A of exhaustor 3 and sealing-plug 5, also be provided with a brace 5A.Exhaustor 3 levels are inwardly extended towards the middle section of dropping funnel 1, Open Side Down is connected with one or more first air filter 4 for the first end 3B of exhaustor 3, first air filter 4 be shaped as cylinder or spherosome or hemisphere or globoid or circle hat body or bullet.Be provided with the one or more first waterproof air filtration film 4A on the surface of first air filter 4, surface location is provided with the first waterproof air filtration film 4A.The first waterproof air filtration film 4A is positioned at the middle section of the cylinder position cross section of dropping funnel 1, and the peak of first waterproof air filtration film 4A control the pipe of dropping funnel 1 high 1/2nd to 2/3rds between.The first waterproof air filtration film is fitted on its main body closely by the method for ultrasonic or heat seal or gummed, has or there are linear mediastinum or grid in both sides in a side of filter membrane.
Below dropping funnel 1, be connected with down tube for transfusion 7, connect a liquid medicine filter 10 at tube for transfusion 7 down, in liquid medicine filter 10, install one or more second air filter 8 at the cover plate of the containing cavity of feed liquor one side.The one or more second waterproof air filtration film 8A is installed in second air filter 8; the outside at the second waterproof air filtration film 8A is provided with a block protection cover plate; filter membrane is covered; on the protection cover plate, also be provided with one or more steam vent 8B, intermittently chamber is arranged between protection cover plate and the second waterproof air filtration film 8A.
Operational approach: identical with embodiment one.
Embodiment three,
A kind of automatic exhaust system as shown in Figure 3 is used for blood return preventing infusion device, and the cervical region in dropping funnel 1 upper end connects a nozzle 2, and the mouth mouth 2A of nozzle 2 is arranged on the upper end in dropping funnel chamber.First air filter 4 and exhaustor 3 all are arranged on the dropping funnel intracavity.Offer the second end 3A that an openning connects exhaustor 3 on the diapire of dropping funnel holder 1B, the second end 3A at exhaustor 3 connects a sealing-plug 5, between sealing-plug 5 and exhaustor 3 inwalls, be provided with a sealing ring 6, between the second end 3A of exhaustor 3 and sealing-plug 5, also be provided with a brace 5A.Exhaustor upwards extends towards the dropping funnel intracavity, arrive dropping funnel 1 pipe high 1/2nd to 2/3rds between the time level of turning round extend towards the middle section of dropping funnel 1.Open Side Down is connected with one or more first air filter 4 for the first end 3B of exhaustor 3, first air filter 4 be shaped as cylinder or spherosome or hemisphere or globoid or circle hat body or bullet.On the surface of first air filter 4, also be provided with the one or more first waterproof air filtration film 4A, the first waterproof air filtration film 4A is positioned at the middle section of the cylinder position cross section of dropping funnel 1, and the peak of first waterproof air filtration film 4A control the pipe of dropping funnel 1 high 1/2nd to 2/3rds between.The first waterproof air filtration film is fitted on its main body closely by the method for ultrasonic or heat seal or gummed, has or there are linear mediastinum or grid in both sides in a side of filter membrane.
Below dropping funnel 1, be connected with tube for transfusion 7 down, connect a hollow capsule pipe 11 at following tube for transfusion 7, at middle and upper part or the top of hollow capsule pipe 11 one or more second air filters 8 are installed.The one or more second waterproof air filtration film 8A is installed in second air filter 8; the outside at the second waterproof air filtration film 8A is provided with a block protection cover plate; filter membrane is covered; on the protection cover plate, also be provided with one or more steam vent 8B, intermittently chamber is arranged between protection cover plate and the second waterproof air filtration film 8A.
Operational approach: identical with embodiment one.
Claims (6)
1. blood return preventing infusion device automatic exhaust system, comprise dropping funnel (1) in the described blood return preventing infusion device, following tube for transfusion (7), be installed in down liquid medicine filter (10) or hollow capsule pipe (11) in the tube for transfusion (7), be installed in down the outer cone joint (9) of tube for transfusion (7) tail end, it comprises first air filter (4) native system, exhaustor (3), nozzle (2), feature is: described nozzle (2) is installed in the cervical region of dropping funnel (1) upper end, the mouth mouth (2A) of nozzle (2) is arranged on the upper end in dropping funnel chamber, described first air filter (4) and exhaustor (3) all are arranged on the dropping funnel intracavity, the main body of described first air filter (4) is connected in first end (3B) of described exhaustor (3), second end (3A) and the dropping funnel wall of described exhaustor (3) join, the first waterproof air filtration film (4A) is housed on described first air filter (4), the described first waterproof air filtration film (4A) is fixed on the main body by the method for ultrasonic or heat seal or gummed closely, the described first waterproof air filtration film (4A) places the middle section of the cylinder position cross section of described dropping funnel (1), and the peak of the first waterproof air filtration film (4A) place described dropping funnel (1) pipe high 1/2nd to 2/3rds between.
2. a kind of blood return preventing infusion device automatic exhaust system described in claim 1, it is characterized in that: be provided with one or more first air filter (4) in the dropping funnel (1), the one or more first waterproof air filtration film (4A) is housed on described first air filter (4).
3. a kind of blood return preventing infusion device automatic exhaust system described in claim 1, it is characterized in that: second end (3A) at described exhaustor (3) is furnished with a sealing-plug (5), between second end (3A) of described sealing-plug (5) and described exhaustor (3), also be provided with a brace, between second end (3A) of described exhaustor (3) and described sealing-plug (5), also be provided with a sealing ring (6).
4. a kind of blood return preventing infusion device automatic exhaust system described in claim 1, it is characterized in that: the opening of establishing on second end (3A) of described exhaustor (3) and dropping funnel (1) sidewall joins.
5. a kind of blood return preventing infusion device automatic exhaust system described in claim 1, it is characterized in that: the opening of establishing on second end (3A) of described exhaustor (3) and dropping funnel (1) roof joins.
6. a kind of blood return preventing infusion device automatic exhaust system described in claim 1, it is characterized in that: the opening of establishing on second end (3A) of described exhaustor (3) and dropping funnel (1) diapire joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110387943 CN102389603B (en) | 2011-11-20 | 2011-11-20 | Automatic air discharging system of infusion device capable of preventing blood return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110387943 CN102389603B (en) | 2011-11-20 | 2011-11-20 | Automatic air discharging system of infusion device capable of preventing blood return |
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| CN102389603A CN102389603A (en) | 2012-03-28 |
| CN102389603B true CN102389603B (en) | 2013-07-17 |
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| CN 201110387943 Expired - Fee Related CN102389603B (en) | 2011-11-20 | 2011-11-20 | Automatic air discharging system of infusion device capable of preventing blood return |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688534B (en) * | 2012-05-11 | 2014-02-12 | 魏颖德 | Multifunctional liquid medicine filter for infusion |
| CN103191499B (en) * | 2013-03-27 | 2018-04-03 | 北京福尔安娜科技发展有限公司 | Positioning and mounting structure of the pointed only bubble exhaust membrane in drop bottle steam vent |
| CN104138628B (en) * | 2013-05-22 | 2016-04-20 | 山东威高集团医用高分子制品股份有限公司 | A kind of automatic liquid-stopping dropping funnel |
| US20160213861A1 (en) | 2015-01-27 | 2016-07-28 | Becton, Dickinson And Company | Air stop membrane for maintaining a fluid column in an iv set |
| CN104758998A (en) * | 2015-04-21 | 2015-07-08 | 山东新华安得医疗用品有限公司 | Exhaust and liquid stopping infusion apparatus |
| CN104740734A (en) * | 2015-04-21 | 2015-07-01 | 山东新华安得医疗用品有限公司 | Exhaust infusion apparatus |
| CN107432966A (en) * | 2017-08-31 | 2017-12-05 | 浙江康康医疗器械有限公司 | A kind of exhaust dropping funnel certainly |
| CN114887143B (en) * | 2022-04-24 | 2023-10-03 | 上海南湖职业技术学院 | Auxiliary checking equipment for venous transfusion process |
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| US6261267B1 (en) * | 1998-10-09 | 2001-07-17 | Globe Enterprises, Inc. | Automatic IV shut off valve |
| EP1693077A2 (en) * | 2005-02-18 | 2006-08-23 | Becton, Dickinson and Company | Pressure activated IV set with drip chamber having a lateral access and a pressure valve |
| CN101670134A (en) * | 2008-09-13 | 2010-03-17 | 谢世庚 | Automatic exhaust blood return prevention infusion apparatus |
| CN201969108U (en) * | 2011-01-16 | 2011-09-14 | 谢世庚 | Automatic blood backflow prevention infusion apparatus |
| CN202336116U (en) * | 2011-11-20 | 2012-07-18 | 戎静华 | Automatic exhaust system for blood return prevention infusion apparatus |
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| US6261267B1 (en) * | 1998-10-09 | 2001-07-17 | Globe Enterprises, Inc. | Automatic IV shut off valve |
| EP1693077A2 (en) * | 2005-02-18 | 2006-08-23 | Becton, Dickinson and Company | Pressure activated IV set with drip chamber having a lateral access and a pressure valve |
| CN101670134A (en) * | 2008-09-13 | 2010-03-17 | 谢世庚 | Automatic exhaust blood return prevention infusion apparatus |
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| CN202336116U (en) * | 2011-11-20 | 2012-07-18 | 戎静华 | Automatic exhaust system for blood return prevention infusion apparatus |
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