CN103800974B - Timing, metering and charging device for oxygen delivery - Google Patents
Timing, metering and charging device for oxygen delivery Download PDFInfo
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- CN103800974B CN103800974B CN201410093677.4A CN201410093677A CN103800974B CN 103800974 B CN103800974 B CN 103800974B CN 201410093677 A CN201410093677 A CN 201410093677A CN 103800974 B CN103800974 B CN 103800974B
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Abstract
A timing, metering and charging device for oxygen delivery belongs to the technical field of medical equipment. The technical scheme is that the timing, metering and charging device comprises a gas pressure sensor, a temperature regulating device, a control device, a display device, a warning device and a communication device, wherein the gas pressure sensor and the temperature regulating device are arranged between an oxygen input end and an oxygen output end of oxygen delivery equipment; the gas pressure sensor transmits a pressure signal acquired and the temperature regulating device transmits an actual oxygen delivery temperature signal acquired to the control device; the control device is provided with two paths for outputting; one path outputs the oxygen delivery time, the oxygen flow and the oxygen consuming cost to the display device, and the other path outputs the oxygen flow to the warning device; the display device transmits the oxygen delivery time, the oxygen flow and the oxygen consuming cost and the warning device transmits a warning signal to the communication device. The timing, metering and charging device is used for detecting the oxygen supply amount and the oxygen supply time of the oxygen delivery equipment and calculating the oxygen delivery cost, and is convenient to use, high and accurate in data real-time performance, safe, and reliable.
Description
Technical field
The present invention relates to medical instruments field, particularly relate to metering and billing device during a kind of oxymeter.
Background technology
Oxygen therapy is a kind of conventional medical procedure, uses humidification bottle to patient when current doctor cures by oxygen therapy, and by humidification bottle by dry oxygen humidification, the oxygen after humidifying is used by oxygen catheter direct grafting patient's muzzle or sucks from mouth for patient with an oxygen absorption mask.The most in use, there is no special oxygen uptake timing metering device, but by medical worker's manual record substantially oxygen time, and it is multiplied by unit price calculating oxygen therapy expense by the time, this kind of method does not simply fail to accurate timing, and cannot accurate measurement, often causing charge dispute, the manual monitoring simultaneously curing by oxygen therapy process also considerably increases the work load of medical worker.
At present, for the problems referred to above, medical worker utilizes timer of the prior art, it is directly installed on oxygen supply device, when opening oxygen supply device, is pressed timer simultaneously, and when closing oxygen supply device, again press timer, calculate the oxygen therapy time by the moment of oxygen supply device opening and closing, and then calculate oxygen therapy expense.Although the problem solving the inconvenience of manual monitoring time, but oxygen consuming amount remains fuzzy data, and described timer and oxygen supply device are the devices of individualism, even if closing timer during oxygen therapy, being again turned on afterwards, medical personnel are still difficult to add up oxygen accurately and use the time.
Utility model patent CN202538105U discloses a kind of timing oxygen flow meter, it includes flowmeter bodies, valve controling rod and breather, on described valve controling rod axially disposed fluted, the free end of valve controling rod is can arrange timer in the way of the rotation of Valve controlling rod axis, being provided with on timer and axially extend to the connecting rod directly over groove along valve controling rod, the free end of connecting rod is fixedly installed the slip bump extended in groove.Utilizing lever principle, when Open valve controls the knob on bar, the bump in the connecting rod of connection timer skids off groove, and oxygen therapy and timing start simultaneously at, and are once closed by knob, and oxygen therapy and timing simultaneously close off.This utility model patent is not only provided with oxygen flow meter and time set is measured oxygen flow and uses the oxygen time, sufferer is made to become apparent from understanding the service condition of oxygen supply device, and the time set structure of machinery triggering form is opened with oxygen therapy, the shut-in time is Tong Bu, solves above-mentioned medical personnel and is difficult to the problem that accurate statistics oxygen uses the time.
But, this synchronization is opened, is closed the frame for movement of oxygen therapy and timing for the angle of life-time service, because of repeatedly mechanical friction, make each structure that abrasion change occur, cannot quickly, flexibly, use accurately, described timing oxygen flow meter slow motion or misoperation not even action may be caused so that its service life reduces；And above-mentioned effusion meter is generally float-ball type gas flowmeter, measures numerical value and forbidden to truly have bigger error；In addition, medical worker needs described in manual transcription the oxygen flow measured by timing oxygen flow meter and uses oxygen time data, then manual conversion become with oxygen expense and input medical system statistics patient medical expense, and in use patient cannot as required situation regulation flow of oxygen.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, it is provided that metering and billing device during a kind of oxymeter so that it is oxygen-supplying amount and oxygen supply time, beneficially save medical resources can be detected accurately and timely.
Metering and billing device when a kind of oxymeter of offer is provided, for the oxygen supply device being made up of humidification bottle, air valve knob, manual flow regulation switch, oxygen input and oxygen output, it is characterized in that, including gas pressure sensor, register, control device, display device, communicator and alarm device；Described gas pressure sensor and described register are respectively positioned between described oxygen input and the described oxygen output of described oxygen supply device；The actual oxygen therapy temperature signal collected all is transferred to described control device by the pressure signal collected and described register by described gas pressure sensor, described control device has two-way to export, one tunnel output oxygen therapy time, oxygen flow and by oxygen expense extremely described display device, another road output oxygen flow is to described alarm device, and alarm signal by oxygen therapy time, oxygen flow and is all transferred to described communicator with oxygen expense and described alarm device by described display device.
Metering and billing device during this oxymeter, gas pressure sensor is mainly utilized to measure when air valve knob is opened and the oxygen pressure of oxygen input during manual flow regulation switch-mode regulation, the pressure signal input control device that gas pressure sensor will gather, and utilize register regulation oxygen therapy temperature and be also delivered to temperature value control device, described control device timing, oxygen pressure signal and temperature signal are converted into oxygen flow and calculate and use oxygen expense, and described data are delivered to display device respectively, understand that the concrete condition of oxygen supply device is to avoid medical expense dispute and communicator to be uploaded to main system to realize data for patient, save the statistical data work that medical worker is the most loaded down with trivial details；The use of alarm device is in order to avoid oxygen content is excessively used the two kinds of situations causing patient's peroxide to suck and to cause body harm and oxygen content persistently to flow out on a small quantity and cause medical resource to waste always；And the output signal of alarm device is transmitted to communicator, can the duty of remote real-time monitoring oxygen supply device.
Described register includes temperature-detecting device, temperature controller, digital display screen, power interface and start-stop button；Described temperature controller includes control circuit and heater block.The present invention utilizes register not only to regulate output oxygen temperature but also guarantees flow of oxygen and calculate accurately by oxygen expense.Human body suitably cures by oxygen therapy temperature typically at 20 DEG C-40 DEG C, utilizes register automatically to detect and adjusts less than the oxygen temperature value suitably curing by oxygen therapy temperature so that human body oxygen uptake is smooth and easy, comfortable；Simultaneously, oxygen supply device under condition of different temperatures is used and controls to be in unified and suitable oxygen therapy temperature range in oxygen therapy temperature, oxygen supply device at a temperature of curing by oxygen therapy compared to difference uses, and the calculating standard calculating the oxygen flow that obtained of chip and oxygen therapy expense through oxygen flow is unified, accurate, fair.
Described control device is made up of signal amplification circuit, analog to digital conversion circuit, single chip circuit, charging circuit, power circuit.
Described gas pressure sensor is the resistance strain type sensor being made up of metal element and resistance strain gage, described flexible member be stressed change after deformation, trigger the clocking capability of described single chip circuit.
Described gas pressure sensor gathers gas pressure signal, inputs described single chip circuit through described amplifying circuit, analog-digital conversion circuit as described successively.
The pin of the band clock circuit that the metal element that described gas pressure sensor deforms upon not only by sensed pressure change triggers single chip circuit carries out curing by oxygen therapy timing, and the resistance that resistor disc can be changed, the force value namely changed, through signal amplification circuit and analog to digital conversion circuit, it is converted into digital quantity input single chip circuit output oxygen flow.It follows that oxygen supply device is once use, the measurement of clocking capability and oxygen therapy pressure is opened simultaneously, can the most accurately measure oxygen therapy time and oxygen flow；The construction features of described gas pressure sensor is sensitiveer, stable, reliable compared to frame for movement triggering timing function.
Described charging circuit is by the oxygen flow of input and oxygen therapy Time Calculation output oxygen expense.
Described display device is LCD display circuit and display signal projector.
Described communicator includes receiving unit, memory element and transmitter unit.
Described alarm device includes comparison circuit, alarm signal emitter and buzzer.
Described alarm device detects oxygen flow by described comparison circuit, when actual oxygen throughput is recovered normally to cure by oxygen therapy state higher than maximum oxygen throughput, described buzzer sounding alarm, manual adjustment manual flow regulation switch；When actual oxygen throughput is less than minimum oxygen flow, described buzzer sounding alarm, manually fasten air valve knob in case oxygen supply device opens by mistake opens.
The method have the advantages that
1, easy to use.Patient according to aerobic situation open and close or manually regulate oxygen supply device, and can understand the service condition of oxygen supply device from display device, it is to avoid unnecessary medical tangle；And medical worker only need to be uploaded to the information of main system by communicator can understand the service condition of each patient's oxygen supply device, it is greatly saved human resources.
2, real-time property is high and accurate.The timing of the use synchronous averaging of oxygen supply device and oxygen pressure detection function, and ensure oxygen therapy proper temperature by register, the most described oxygen Fare determined by travel time metering device fed back oxygen supply device service condition in time, efficiently and accurately.
3, safe and reliable.Alarm device monitor in real time the most very few situation of oxygen flow and and alarm, remind patient turn down flow of oxygen or close air valve knob；And medical worker is according to the alarm signal of main system, monitors the service condition of oxygen supply device in real time, and take corresponding measure to avoid malpractice or medical resource waste.
Accompanying drawing explanation
Below with reference to accompanying drawings specific embodiments of the present invention are described in detail, wherein:
Fig. 1 is the structure chart of the oxygen supply device of prior art；
Fig. 2 is equipped with the structure chart of the oxygen supply device of metering and billing device during oxymeter of the present invention；
The circuit block diagram of metering and billing device when Fig. 3 is oxymeter of the present invention；
When Fig. 4 is oxymeter of the present invention, metering and billing device is for the system block diagram of medical treatment master control system.
In figure, 1-gas flowmeter；2-air valve；3-humidification bottle；4-air valve knob；5-manual flow regulation switch；6-oxygen output；7-oxygen input；8-gas pressure sensor；9-controls device；10-display device；11-communicator；12-alarm device；13-register.
Detailed description of the invention
Below according to drawings and Examples, the present invention is described in further detail:
Fig. 1 show oxygen supply device of the prior art, this oxygen supply device mainly humidification bottle 3 by gas flowmeter 1, air valve 2 with equipped with pure water forms, rotate air valve knob and open oxygen terminal, make oxygen pass sequentially through oxygen input, gas flowmeter, humidification bottle and oxygen output, and be transported at patient use by flexible pipe；Rotate backward air valve and close oxygen terminal.
This oxygen supply device is although with recording the aerometer gauge of oxygen flow, but due to gas flowmeter limited precision, surveyed data have bigger error, and this oxygen supply device does not install oxygen therapy time set additional.Therefore, the present invention on this basis, metering and billing device when installing oxymeter between distribution pipeline and humidification bottle so that utilizing of oxygen supply device is more convenient, real-time property is high and accurate and safe and reliable.
Fig. 2 show equipped with the structure chart of the oxygen supply device of metering and billing device during oxymeter of the present invention.This oxygen supply device includes humidification bottle 3, air valve knob 4, manual flow regulation switch 5, oxygen input 6 and oxygen output 7, and during oxymeter, metering and billing device is arranged between manual flow regulation switch 5 and humidification bottle 3.When opening air valve knob 4, the oxygen of oxygen terminal flows into oxygen catheter for patient from oxygen input 6, air valve knob 4, manual flow regulation switch 5, gas pressure sensor 8, register 13, humidification bottle 3 and oxygen output 7 successively.It addition, patient also can be according to self aerobic situation, manual adjustment manual flow regulation switch 5.
Described gas pressure sensor 8 gathers oxygen pressure signal and described register collection actual oxygen therapy temperature signal is all sent to control device 9, realize the timing of oxygen therapy time, oxygen flow and oxygen therapy expense to calculate, surveyed data are sent to display device video data to patient, the transparency used to guarantee oxygen supply device to consume by described control device 9；Meanwhile, described control device 9 by oxygen flow information conveyance to alarm device 12, it is judged that oxygen supply device is the most proper use of.
The circuit block diagram of metering and billing device when Fig. 3 show oxymeter of the present invention.In figure, gas pressure sensor 8 and register conveying gather signal extremely control device 9, and described control device 9 is made up of operational amplification circuit, analog to digital conversion circuit, power circuit, single chip circuit and charging circuit.The oxygen pressure signal that described gas pressure sensor 8 gathers is the least, need to be to A/D change-over circuit after signal amplification circuit amplifies signal, the useful signal of general gas flow pressure transducer output is difference mode signal, then preferably differential mode amplification circuit is as signal amplification circuit.Measurement amount exports digital quantity input single chip circuit after A/D change-over circuit, described single chip circuit uses the singlechip chip calculating gas flow, the gas pressure signal collected and actual oxygen therapy temperature signal can be converted into gas flow signals and be exported to charging circuit, display device 10 and alarm device 12.
Described charging circuit, according to hospital's charging criterion, can design kinds of schemes.One of preferred version, when manual flow adjusting knob does not uses, then amount of oxygen determines, according to the oxygen therapy time be multiplied by the unit interval with oxygen expense calculate actual oxygen therapy expense；One of preferred version, when only considering oxygen flow, the oxygen expense of using being multiplied by specific discharge according to oxygen flow calculates actual oxygen therapy expense；One of preferred version, when considering oxygen flow and oxygen therapy time simultaneously, calculates actual oxygen therapy expense according to both sides relation founding mathematical models.
Described display device 10 and described alarm device 12 are all connected by correspondence with described communicator 11, alarm signal is launched to communicator 11 by alarm signal emitter by described display device 10 by the real-time Data Transmission of oxygen therapy time, oxygen flow and oxygen therapy expense to described communicator 11, described alarm device by display signal projector；Reception unit receiving real-time data in described communicator 11 and alarm signal are also stored by memory element, are then sent to medical treatment main system (such as Fig. 4) by transmitter unit.
Gas pressure sensor is one of critical component of the present invention, the gas pressure sensor that prioritizing selection can the most normally work in oxygen-enriched wet environment, highly sensitive and reliability is high, preferably resistance strain type sensor.Described gas pressure sensor 8 is constituted (not shown) by metallic elastic component and resistance strain gage, when metallic elastic component answers pressure change to strain, paste the resistance value of resistance strain gage on metallic elastic component surface by the strain along with flexible member respective change, say, that the changing value of resistance is equivalent to gas pressure change value.The present invention utilizes described gas pressure sensor 8 to gather oxygen pressure signal, and amplifies with the form of resistance signal, is converted into digital quantity input single chip circuit；The most described gas pressure sensor 8 internal mechanical structure triggers the clocking capability in single chip circuit, deform upon when metallic elastic component is stressed, with the conductive contact being connected to outside metallic elastic component, and described wire connects the clock circuit pin of single chip circuit, the most described metallic elastic component deformation makes described clock circuit work.The present invention utilizes described gas pressure sensor to realize the measurement of real-time oxygen pressure and oxygen therapy time timing simultaneously, and described gas pressure sensor is measured highly sensitive so that oxygen use data are accurately, timely, real-time is high, reduces medical tangle.
It addition, equipped with register 13 between oxygen input 7 and oxygen output 6.Described register 13 includes temperature-detecting device, temperature controller, digital display screen, power interface and start-stop button；Described temperature controller includes control circuit and heater block (not shown).Described register 13 is an automatic temperature-regulator, temperature-detecting device detection room temperature input temp controller, when the suitable oxygen uptake temperature set is more than 5 DEG C than measured temperature, control circuit output heating instructions in temperature controller, heater block is to output oxygen heating, during until the difference of the suitable oxygen uptake temperature of measured temperature and setting is not more than 5 DEG C, heater block stops output oxygen heating.Wherein, described digital display screen is used for showing oxygen therapy temperature；Described power interface connects the power circuit in described control device；Control circuit in described temperature controller can be made up of simple singlechip chip or comparison circuit, and heater block can be heating wire or the highest exothermic material of other heat conductivity.Therefore, one of benefit equipped with described register 13 is to adjust output oxygen temperature, even if so that the patient being in constant temperature also can suck comfortable oxygen at temperature relatively low period, cryogenic oxygen is avoided to stimulate respiratory tract and cardiopulmonary, resistance of human body is caused to decline, the problem making patient's aggravation what is more.
Another benefit equipped with described register 13 is to ensure that the accuracy of detection data.Described register 13 is installed in before described gas pressure sensor 8 (such as Fig. 2) or (not shown) can afterwards.First turn on off button and start described register 13, when the measured temperature of oxygen is less than the suitable oxygen uptake temperature 5 DEG C set, heater block heating is until both differences are less than 5 DEG C, and the output of the most described register 13 stops the temperature after heating, i.e. actual oxygen therapy temperature；When the measured temperature of oxygen is not less than the suitable oxygen uptake temperature 5 DEG C of setting, described register 13 exports the actual measurement temperature of oxygen, i.e. actual oxygen therapy temperature.Then, described register 13 exports the single chip circuit in actual oxygen therapy temperature signal extremely described control device, and actual oxygen therapy temperature and the oxygen pressure of input are conversed oxygen flow according to chip internal counting circuit by single chip circuit.Finally, when being no longer necessary to oxygen therapy temperature homoiothermic is processed, again described register is closed by off button.Therefore, even if the period that temperature is relatively low, especially winter, oxygen supply device uses calculated to use oxygen flow all identical with any period with by oxygen expense, and measurement criteria is consistent, and data are accurately and reliably.
During use, opening air valve knob 4, oxygen supply device is started working.Period, patient can regulate switch 5 according to needed for oneself with oxygen time, oxygen consuming amount, closedown air valve knob 4 or regulation manual flow.When there is power failure or disconnection fault suddenly, the work of described single chip circuit is by storage battery power supply, because the described outer power circuit being connected on outside single chip circuit is made up of external power supply, switching circuit and accumulator, switching circuit is once detect that external power supply is less than 0V, and single chip circuit works on after being transferred to accumulator；During power-off, the built-in storage storage real time data of described single-chip microcomputer；When recovering again to power, during this oxymeter, metering and billing device works on；And when new patient opens use oxygen conveying device, the function of reset in single-chip microcomputer is opened, measurement data before removing.Therefore, when integrated above-mentioned control device 9, the reset button of single-chip microcomputer is encapsulated in outside device.
The most normally use to monitor oxygen supply device, be provided with alarm device 12.Described alarm device includes comparison circuit and buzzer.The more real-time oxygen flow of comparison circuit, needs to consider to exceed maximum oxygen throughput and two kinds of situations less than minimum oxygen flow, it is therefore desirable to arrange two comparators, and described maximum oxygen throughput and minimum oxygen flow are empirical value in medical treatment；When actual oxygen throughput is reported to the police higher than maximum oxygen throughput, buzzer, and now oxygen consuming amount exceeds patient's normal oxygen uptake standard, then manual adjustment manual flow regulation switch is needed to recover normal oxygen therapy state, to avoid peroxide respiratory hazard health；When actual oxygen throughput is less than minimum oxygen flow, buzzer sounding alarm, and time of fire alarming continues for some time, now oxygen supply device does not completely closes after opening by mistake or using, then need manually to fasten air valve knob to avoid medical resource to waste.
When Fig. 4 show oxymeter of the present invention, metering and billing device is for the system block diagram of medical treatment master control system.According to said process, when utilizing described oxymeter, metering and billing device detects the service condition of each patient's oxygen supply device, and transmitting real-time data is to communication device.During multiple oxymeter, the communication device of metering and billing device uses information as the end that uses of each oxygen supply device to the oxygen therapy of the medical treatment main system each oxygen supply device of this terminal transmission.Medical personnel are not required to manually add up oxygen therapy time and flow of oxygen and calculating oxygen therapy expense, it is only necessary to intuitively, quickly know that according to the information uploaded patient uses oxygen situation；Meanwhile, each oxygen supply device service condition can be monitored in real time the most normally, according to warning message, make in time not with regard to measure.
Embodiment described above is only to be described the preferred embodiment of the present invention, is not defined the spirit and scope of the present invention.On the premise of without departing from design concept of the present invention; various modification that technical scheme is made by this area ordinary person and improvement; the protection domain of invention all should be dropped into, the technology contents that the present invention is claimed, all record in detail in the claims.
Claims (8)
1. metering and billing device during an oxymeter, for the oxygen supply device being made up of humidification bottle (3), air valve knob (4), manual flow regulation switch (5), oxygen input (6) and oxygen output (7), it is characterized in that, including gas pressure sensor (8), register (13), control device (9), display device (10), communicator (11) and alarm device (12)；Described gas pressure sensor (8) and described register (13) are respectively positioned between the described oxygen input (6) of described oxygen supply device and described oxygen output (7)；The actual oxygen therapy temperature signal collected all is transferred to described control device (9) by the pressure signal collected and described register (13) by described gas pressure sensor (8)；Described control device (9) has two-way to export, the road output oxygen therapy time, oxygen flow and by oxygen expense to described display device (10), another road output oxygen flow extremely described alarm device (12)；Alarm signal by oxygen therapy time, oxygen flow and is all transmitted to described communicator (11) by described display device (10) with oxygen expense and described alarm device (12)；Described control device (9) is made up of signal amplification circuit, analog to digital conversion circuit, single chip circuit, charging circuit, power circuit；Described gas pressure sensor (8) is the resistance strain type sensor being made up of metal element and resistance strain gage, described flexible member be stressed change after deformation, trigger the clocking capability of described single chip circuit.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described register (13) includes temperature-detecting device, temperature controller, digital display screen, power interface and start-stop button；Described temperature controller includes control circuit and heater block.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described gas pressure sensor (8) gathers gas pressure signal, inputs described single chip circuit through described amplifying circuit, analog-digital conversion circuit as described successively.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described charging circuit is by the oxygen flow of input and oxygen therapy Time Calculation output oxygen expense.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described display device (10) is LCD display circuit and display signal projector.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described communicator (11) includes receiving unit, memory element and transmitter unit.
The most according to claim 1, metering and billing device during oxymeter, is characterized in that, described alarm device (12) includes comparison circuit, alarm signal emitter and buzzer.
Metering and billing device during oxymeter the most according to claim 7, it is characterized in that, described alarm device (12) detects oxygen flow by described comparison circuit, when actual oxygen throughput is higher than maximum oxygen throughput, described buzzer sounding alarm, manual adjustment manual flow regulation switch recovers normally to cure by oxygen therapy state；When actual oxygen throughput is less than minimum oxygen flow, described buzzer sounding alarm, manually fasten air valve knob in case oxygen supply device opens by mistake opens.
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| CN201410093677.4A CN103800974B (en) | 2014-03-14 | 2014-03-14 | Timing, metering and charging device for oxygen delivery |
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| CN103800974B true CN103800974B (en) | 2017-01-11 |
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| CN105288803A (en) * | 2014-06-10 | 2016-02-03 | 绍兴市超捷医疗器械有限公司 | Medical gas terminal control system |
| CN104436390A (en) * | 2014-11-04 | 2015-03-25 | 尚健国际有限公司 | Oxygen inhalation compliance module used for oxygen therapy |
| CN104721930A (en) * | 2015-03-27 | 2015-06-24 | 郝泽蕊 | System for providing ventilation support |
| CN106730200A (en) * | 2016-12-27 | 2017-05-31 | 北京澳森信息工程技术研究院有限公司 | A kind of digitalization control method of the oxygen inhalation apparatus based on pressure sensor |
| CN107185092A (en) * | 2017-07-21 | 2017-09-22 | 丁宝艳 | A kind of medical portable oxygen generating means of internal medicine |
| CN109658618A (en) * | 2019-02-18 | 2019-04-19 | 孙冠名 | A kind of medical oxygen terminal timing oxygen uptake and traffic statistics charging system |
| CN110060421A (en) * | 2019-04-25 | 2019-07-26 | 温州西软科技有限公司 | Oxygen uptake charge system based on Internet of Things |
| CN110155949B (en) * | 2019-06-10 | 2024-03-29 | 山西卫弋医疗科技有限公司 | Oxygen generating device, flow purchasing and charging system and method of oxygen generating device |
| CN111243184A (en) * | 2020-01-08 | 2020-06-05 | 南京市第一医院 | Full-automatic intelligent digital oxygen flow monitoring device |
| CN111359067A (en) * | 2020-03-23 | 2020-07-03 | 成都市龙泉驿区第一人民医院 | Oxygen induction and flow recording system |
| CN113269929A (en) * | 2021-06-16 | 2021-08-17 | 杭州市余杭区中医院 | Automatic oxygen inhalation fee counter |
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| CN103800974A (en) | 2014-05-21 |
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