CN104208778A - Nebulization drug delivery system for respiratory circuit - Google Patents
Nebulization drug delivery system for respiratory circuit Download PDFInfo
- Publication number
- CN104208778A CN104208778A CN201410484315.8A CN201410484315A CN104208778A CN 104208778 A CN104208778 A CN 104208778A CN 201410484315 A CN201410484315 A CN 201410484315A CN 104208778 A CN104208778 A CN 104208778A
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- Prior art keywords
- air inlet
- atomization
- utricule
- inlet pipe
- drug storage
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Links
- 230000000241 respiratory effect Effects 0.000 title claims abstract description 13
- 238000012377 drug delivery Methods 0.000 title abstract 4
- 238000002663 nebulization Methods 0.000 title 1
- 239000003814 drug Substances 0.000 claims abstract description 117
- 238000000889 atomisation Methods 0.000 claims abstract description 83
- 229940079593 drug Drugs 0.000 claims abstract description 59
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims description 16
- 238000002604 ultrasonography Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 230000003444 anaesthetic effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 210000004072 lung Anatomy 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000001225 therapeutic effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006199 nebulizer Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 208000019693 Lung disease Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001949 anaesthesia Methods 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002664 inhalation therapy Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Medicinal Preparation (AREA)
Abstract
The invention relates to an atomization drug delivery system for a respiratory circuit, which comprises a respiratory drug delivery device and a drug atomization device; the respiratory drug delivery device comprises a drug storage atomization bag body, a first air inlet pipe, a second air inlet pipe and an air outlet pipe; the medicine storage atomization bag body is arranged on the medicine atomization device, and is provided with an air inlet, an air outlet and a medicine injection port; one-way valves are respectively arranged in the medicine storage atomization bag body and positioned at the air inlet and the air outlet; the air inlet of the medicine storage atomization bag body is connected with one end of the first air inlet pipe, the air outlet of the medicine storage atomization bag body is connected with one end of the second air inlet pipe, and the other end of the second air inlet pipe is connected with one end of the air outlet pipe through a three-way joint. The invention has simple breathing circuit and can avoid the adverse effect of atomized medicine on the equipment.
Description
Technical field
The present invention relates to a kind of atomized medicine introducing system, be specifically related to a kind of atomized medicine introducing system for breathing circuit.
Background technology
Fog inhalation therapy refers to and uses special atomising device that drug solution is atomized into small granule, small drug particles after atomization enters also attachment and disperse in respiratory tract and lung by the method sucked, locally therapeutical effect is there is in lung, play a role further through the absorption of human body to medicine again, reach effective and noninvasive therapeutical effect rapidly.
Nebulizer fixing on current respirator mainly utilizes the atomization of water, and main purpose keeps breathing gas one section of degree moistening, avoids dry gas on the impact of air flue; But when the nebulizer on application respirator body carries out medicinal atomized, because medicine exists different media, acid-base value, the medicine of atomization can cause extreme influence to equipment, infringement respirator.In prior art, also there is the atomized medicine introducing system being made medical liquid atomizing by high pressure oxygen air-flow, but this atomized medicine introducing system is only applicable to clear-headed patient, inapplicable to the patient being in the state such as respirator on intensive care unit, and there is no anesthetic machine special-purpose medicaments atomising device at present.
In addition, the atomized medicine introducing system of prior art, breathing circuit pipeline is longer, easily causes medicine to be attached to tube wall, causes waste; Meanwhile, atomization gas in breathing circuit and respirator inside deposition in respiratory, can cause corresponding pollution, also can injury device.
Summary of the invention
The object of the invention is to overcome the defect of above-mentioned prior art and provide a kind of atomized medicine introducing system for breathing circuit, this atomized medicine introducing system not only breathing circuit is simple, and atomization medicine also can be avoided the harmful effect of air feed equipment.
For achieving the above object, the technical scheme that the present invention takes is: a kind of atomized medicine introducing system for breathing circuit, and it comprises respiratory administration device and medicinal atomized device; Described respiratory administration device comprises drug storage atomization utricule, the first air inlet pipe, the second air inlet pipe and escape pipe; Described drug storage atomization utricule is located on described medicinal atomized device, and this drug storage atomization utricule is provided with air inlet, gas outlet and medicine-pouring port; In described drug storage atomization utricule, and be positioned at air inlet and gas outlet place is respectively equipped with one-way cock; The air inlet of described drug storage atomization utricule is connected with one end of described first air inlet pipe, the gas outlet of described drug storage atomization utricule is connected with one end of described second air inlet pipe, and the other end of described second air inlet pipe is connected with one end of described escape pipe by three way cock.
Drug storage atomization utricule of the present invention is equivalent to medicated bag, is used for filling the medicine (being loaded on after medicine physiological saline solution in drug storage utricule) that can be used for nebulae inhalation clinically, and medicine is atomized into molecule in drug storage atomization utricule.The one-way cock of air inlet and the setting of gas outlet place is positioned in drug storage atomization utricule, can ensure that the drug particles of gas and atomization only passes through along drug storage utricule air inlet to direction, gas outlet, medicine access arrangement can be prevented, decrease atomized medicine introducing process Chinese medicine to the impact of equipment.
As the improvement of technique scheme, described atomized medicine introducing system also comprises the feeder being provided with air feed port and return-air port, the air feed port of described feeder is connected with the other end of described first air inlet pipe, and the return-air port of described feeder is connected with the other end of described escape pipe.Further, described feeder is breathing equipment or the respirator of anesthetic machine.
As the improvement of technique scheme, described medicinal atomized device is ultrasound atomizer.Further, described ultrasound atomizer comprises fixed mount, the signal generator be located on described fixed mount, be located on described signal generator and the atomization cylinder that liquid is housed and the cylinder cap be located on described atomization cylinder, and described atomization cylinder side is located also to be provided with leakage fluid dram bottom it; Described drug storage atomization utricule is located in the atomization cylinder of described ultrasound atomizer.Described signal generator comprises network source, power control circuit, transforming circuit, ventilation liquid level control circuit, oscillating circuit and transducer; Wherein, the network source of alternating current 220V; by by and off switch and there is overcurrent protection function power control circuit after enter transforming circuit; change into low-voltage dc power supply; oscillating circuit and transducer (piezoelectric ceramic piece) is driven normally to work; produce certain frequency and the adjustable ultrasonic signal of intensity; the generation of ultrasonic signal simultaneously controls by ventilation and liquid level control circuit, namely only has oxygen export and just have atomizing functions in the normal situation of liquid level in atomization cylinder at respirator.Signal generator can parameter set by atomized medicine introducing system of the present invention, produce corresponding ultrasonic signal, liquid drug, by the liquid drug of liquid effects in atomization cylinder in drug storage atomization utricule, is atomized into the molecule that directly can be absorbed by human body alveolar by ultrasonic energy.Liquid in atomization cylinder can be preferably water.Place bottom it, atomization cylinder side arranges leakage fluid dram, the liquid in conveniently replaced atomization cylinder.
As the improvement of technique scheme, described drug storage atomization utricule is made up of polythene material, and the bottom of this drug storage atomization utricule is semiellipsoid or hemisphere.Bottom is that the atomization utricule of semiellipsoid or spheroid is conveniently placed in atomization cylinder; Drug storage atomization utricule can be the utricule of whole clearing, is convenient to like this observe the medicine in utricule.
As the improvement of technique scheme, the medicine-pouring port of described drug storage atomization utricule is provided with sealing cap.The drug storage utricule being provided with sealing cap is hermetic container.
As the improvement of technique scheme, described first air inlet pipe and escape pipe are telescopic pipeline.Further, described first air inlet pipe and escape pipe are the corrugated tube that polythene material is made.
As the improvement of technique scheme, described second air inlet pipe is made up of polythene material, and the inner surface of described second air inlet pipe is smooth.Second air inlet pipe inner surface is smooth reduces medicine attachment in pipe.
The operation principle of atomized medicine introducing system of the present invention is: after opening feeder, oxygen enters drug storage atomization utricule by the first air inlet pipe, be atomized with drug storage together with the medicinal atomized granule in utricule successively by the second air inlet pipe, three way cock, enter human body respiration path, thus enter respiratory system, realize atomization inspiration treatment; During human exhaled breath, the gas of exhalation enters feeder return-air port through escape pipe.The concrete using method of the present invention is: when using the atomized medicine introducing system of said structure, first connecting tee joint and human body respiration path (being namely connected with the breathing laryngeal mask interface of people or tracheal intubation port etc.); After opening feeder, under the effect of feeder output gas pressure, oxygen pushes the one-way cock at drug storage atomization utricule air inlet place open, enters in drug storage atomization utricule; Now, start medicinal atomized device, medicinal atomized one-tenth granule and gas and vapor permeation, push the one-way cock at drug storage atomization utricule gas outlet place open, enter the second air inlet pipe.
Beneficial effect of the present invention is: atomized medicine introducing system breathing circuit of the present invention is simple, by atomising device, by the molecule that medicinal atomized one-tenth directly can be absorbed by alveolar; After drug particles enters alveolar, in lung, locally there is therapeutical effect, then play effect through the whole body that is absorbed in of human body to medicine, accelerate curative effect of medication, reach the object of timely control, intervention and treatment respiratory system disease; The present invention, owing to being provided with one-way cock, can prevent atomized medicine introducing process Chinese medicine on the impact of equipment.In addition, the present invention had both been applicable to treatment and the prevention of patient's pulmonary disease of respirator, was also applicable to the treatment of anaesthesia patient prevention pulmonary complication.
Accompanying drawing explanation
Fig. 1 is the perspective view of the atomized medicine introducing system for breathing circuit of the present invention;
Fig. 2 is the perspective view of respiratory administration device in Fig. 1;
Fig. 3 is the perspective view of ultrasound atomizer in Fig. 1.
In figure, 1 is respiratory administration device, and 2 is ultrasound atomizer; 11 is the second air inlet pipe, 12 be drug storage atomization utricule, 13 is escape pipe for medicine-pouring port, 14 is the first air inlet pipe, 15,16 be sealing cap, 17 for three way cock; 21 be fixed mount, 22 be signal generator, 23 be atomization cylinder, 24 for cylinder cap, 25 is leakage fluid dram.
Detailed description of the invention
For better the object, technical solutions and advantages of the present invention being described, below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, 2, a kind of atomized medicine introducing system for breathing circuit of the embodiment of the present invention, it comprises respiratory administration device 1 and medicinal atomized device, and medicinal atomized device is preferably ultrasound atomizer 2; Respiratory administration device 1 comprises drug storage atomization utricule 12, first air inlet pipe 14, second air inlet pipe 11 and escape pipe 15; Drug storage atomization utricule 12 is located on ultrasound atomizer 2, and this drug storage atomization utricule 12 is provided with air inlet, gas outlet and medicine-pouring port 13; In drug storage atomization utricule 12, and be positioned at air inlet and gas outlet place is respectively equipped with one-way cock; The air inlet of drug storage atomization utricule 12 is connected with one end of the first air inlet pipe 14, and the gas outlet of drug storage atomization utricule 12 is connected with one end of the second air inlet pipe 11, and the other end of the second air inlet pipe 11 is connected with one end of escape pipe 15 by three way cock 17.In drug storage atomization utricule 12, be positioned at air inlet and gas outlet place arranges one-way cock respectively, the flow direction of the drug particles of gas and atomization can be made only along drug storage atomization utricule 12 air inlet to the direction of its gas outlet, can prevent medicine access arrangement from impacting equipment like this.
Preferably, atomized medicine introducing system of the present invention also comprises the feeder being provided with air feed port and return-air port, the air feed port of this feeder is connected with the other end of the first air inlet pipe 14, its return-air port is connected with the other end of escape pipe 15 (feeder selects existing device, and its concrete structure and concrete connected mode thereof do not draw in the accompanying drawings); Further, feeder is breathing equipment in anesthetic machine or respirator (breathing equipment of respirator and anesthetic machine is existing structure, and its structure and concrete connected mode thereof do not draw in the accompanying drawings).
In above-mentioned atomized medicine introducing system, the structure of ultrasound atomizer 2 can have multiple, preferred structure is as shown in Figure 3: ultrasound atomizer 2 comprises fixed mount 21, the signal generator 22 be located on fixed mount 21, the cylinder cap 24 being located at the atomization cylinder 23 on signal generator 22 and being located on atomization cylinder 23, atomization cylinder 23 is built with liquid (this liquid can select water), and atomization cylinder 23 side is located also to be provided with leakage fluid dram 25 bottom it; When selecting the ultrasound atomizer 2 of this structure, drug storage atomization utricule 12 is located in the atomization cylinder 23 of ultrasound atomizer 2, as shown in Figure 1.Signal generator 22 can produce corresponding ultrasonic signal according to the parameter of atomized medicine introducing Operation system setting of the present invention, energy delivery is atomized the liquid medicine in utricule 12 by the ultrasound wave liquid passed through in atomization cylinder 23 to drug storage, make the molecule that medicinal atomized one-tenth directly can be absorbed by alveolar; Liquid in the conveniently replaced atomization cylinder 23 of leakage fluid dram 25 is set.
Atomization cylinder 23 is placed in, the drug storage atomization utricule 12 that we use bottom to be semiellipsoid for convenience of drug storage is atomized utricule 12.Certainly, drug storage atomization utricule 12 may also be bottom for hemispheroidal utricule.Preferably, drug storage atomization utricule 12 is made up of polythene material.
In order to ensure that drug storage atomization utricule 12 is hermetic container, its medicine-pouring port 13 is also provided with sealing cap 16.
Preferably, in atomized medicine introducing system of the present invention, the corrugated tube that the first air inlet pipe 14 and escape pipe 15 are made for polythene material, all scalable; The non-telescoping pipeline that second air inlet pipe 11 is made for polythene material, and adhere in pipeline for reducing medicine, the inner surface of the second air inlet pipe 11 is smooth.
Finally to should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. for an atomized medicine introducing system for breathing circuit, it is characterized in that: comprise respiratory administration device and medicinal atomized device; Described respiratory administration device comprises drug storage atomization utricule, the first air inlet pipe, the second air inlet pipe and escape pipe; Described drug storage atomization utricule is located on described medicinal atomized device, and this drug storage atomization utricule is provided with air inlet, gas outlet and medicine-pouring port; In described drug storage atomization utricule, and be positioned at air inlet and gas outlet place is respectively equipped with one-way cock; The air inlet of described drug storage atomization utricule is connected with one end of described first air inlet pipe, the gas outlet of described drug storage atomization utricule is connected with one end of described second air inlet pipe, and the other end of described second air inlet pipe is connected with one end of described escape pipe by three way cock.
2. as claimed in claim 1 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described atomized medicine introducing system also comprises the feeder being provided with air feed port and return-air port, the air feed port of described feeder is connected with the other end of described first air inlet pipe, and the return-air port of described feeder is connected with the other end of described escape pipe.
3., as claimed in claim 2 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described feeder is breathing equipment or the respirator of anesthetic machine.
4., as claimed in claim 1 or 2 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described medicinal atomized device is ultrasound atomizer.
5. as claimed in claim 4 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described ultrasound atomizer comprises fixed mount, the signal generator be located on described fixed mount, be located on described signal generator and the atomization cylinder that liquid is housed and the cylinder cap be located on described atomization cylinder, described atomization cylinder side is located also to be provided with leakage fluid dram bottom it; Described drug storage atomization utricule is located in the atomization cylinder of described ultrasound atomizer.
6. as claimed in claim 1 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described drug storage atomization utricule is made up of polythene material, and the bottom of this drug storage atomization utricule is semiellipsoid or hemisphere.
7. as claimed in claim 1 for the atomized medicine introducing system of breathing circuit, it is characterized in that: the medicine-pouring port of described drug storage atomization utricule is provided with sealing cap.
8., as claimed in claim 1 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described first air inlet pipe and escape pipe are telescopic pipeline.
9., as claimed in claim 8 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described first air inlet pipe and escape pipe are the corrugated tube that polythene material is made.
10., as claimed in claim 1 for the atomized medicine introducing system of breathing circuit, it is characterized in that: described second air inlet pipe is made up of polythene material, the inner surface of described second air inlet pipe is smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410484315.8A CN104208778B (en) | 2014-09-19 | 2014-09-19 | Nebulization drug delivery system for respiratory circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410484315.8A CN104208778B (en) | 2014-09-19 | 2014-09-19 | Nebulization drug delivery system for respiratory circuit |
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| Publication Number | Publication Date |
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| CN104208778A true CN104208778A (en) | 2014-12-17 |
| CN104208778B CN104208778B (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410484315.8A Active CN104208778B (en) | 2014-09-19 | 2014-09-19 | Nebulization drug delivery system for respiratory circuit |
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| CN (1) | CN104208778B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390262A (en) * | 2016-10-14 | 2017-02-15 | 柳州环山科技有限公司 | Ultrasonic atomization device of breathing machine |
| CN106512158A (en) * | 2016-12-16 | 2017-03-22 | 广东食品药品职业学院 | Intelligent atomizing administration system based on breathing loop |
| CN106860992A (en) * | 2017-04-10 | 2017-06-20 | 无锡圣诺亚科技有限公司 | The Breathing Suppotion of aerosolizable administration sets backup breathing system |
| WO2018107587A1 (en) * | 2016-12-16 | 2018-06-21 | 广东食品药品职业学院 | New atomization drug delivery apparatus convenient for atomization treatment of perioperative patient |
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| CN201049127Y (en) * | 2006-12-31 | 2008-04-23 | 王煜东 | Respiratory loop ultrasonic atomizing therapeutic device |
| CN104001253A (en) * | 2014-05-09 | 2014-08-27 | 广州医科大学附属第一医院 | Invasive/noninvasive mechanical ventilation gas humidifying and heating system and method |
| CN204106767U (en) * | 2014-09-19 | 2015-01-21 | 黑子清 | For the atomized medicine introducing system of breathing circuit |
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2014
- 2014-09-19 CN CN201410484315.8A patent/CN104208778B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201049127Y (en) * | 2006-12-31 | 2008-04-23 | 王煜东 | Respiratory loop ultrasonic atomizing therapeutic device |
| CN104001253A (en) * | 2014-05-09 | 2014-08-27 | 广州医科大学附属第一医院 | Invasive/noninvasive mechanical ventilation gas humidifying and heating system and method |
| CN204106767U (en) * | 2014-09-19 | 2015-01-21 | 黑子清 | For the atomized medicine introducing system of breathing circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390262A (en) * | 2016-10-14 | 2017-02-15 | 柳州环山科技有限公司 | Ultrasonic atomization device of breathing machine |
| CN106512158A (en) * | 2016-12-16 | 2017-03-22 | 广东食品药品职业学院 | Intelligent atomizing administration system based on breathing loop |
| WO2018107587A1 (en) * | 2016-12-16 | 2018-06-21 | 广东食品药品职业学院 | New atomization drug delivery apparatus convenient for atomization treatment of perioperative patient |
| CN106512158B (en) * | 2016-12-16 | 2022-11-15 | 广东食品药品职业学院 | Intelligent atomization drug delivery system based on breathing circuit |
| CN106860992A (en) * | 2017-04-10 | 2017-06-20 | 无锡圣诺亚科技有限公司 | The Breathing Suppotion of aerosolizable administration sets backup breathing system |
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| Publication number | Publication date |
|---|---|
| CN104208778B (en) | 2017-06-16 |
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Effective date of registration: 20220513 Address after: No. 600 Tianhe Road, Tianhe District, Guangzhou, Guangdong 510000 Patentee after: THE THIRD AFFILIATED HOSPITAL OF SUN YAT-SEN University Address before: 510630 Department of Anesthesiology, the Third Affiliated Hospital of Sun Yat sen University, No. 600 Tianhe Road, Tianhe District, Guangzhou, Guangdong Patentee before: Youko Kiyoshi Patentee before: Wen Zhihao |
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Effective date of registration: 20230117 Address after: Room A1401, Guofu Cultural and Creative Industry Factory, No. 16 Lanjing Middle Road, Zhukeng Community, Longtian Street, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen meiger biomedical Group Co.,Ltd. Address before: No. 600 Tianhe Road, Tianhe District, Guangzhou, Guangdong 510000 Patentee before: THE THIRD AFFILIATED HOSPITAL OF SUN YAT-SEN University |
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Denomination of invention: Atomization drug delivery system for respiratory circuit Granted publication date: 20170616 Pledgee: Shenzhen Rural Commercial Bank Co.,Ltd. Nanshan Sub branch Pledgor: Shenzhen meiger biomedical Group Co.,Ltd.|SHENZHEN MAYGREEN MEDICAL EQUIPMENT Co.,Ltd. Registration number: Y2024980002652 |