CN114642810A - Anesthesia machine gas circuit system and ventilation method thereof - Google Patents

Abstract

The invention provides an anesthesia machine gas path system, which aims to solve the problems of high oxygen consumption and limited use scene of the existing anesthesia machine and comprises an oxygen supply module, a laughing gas supply module, an air supply module, a driving gas switching valve, a breathing gas mixing module, a breathing end module and a driving end module, wherein the driving end module is used for providing gas suction pressure of a breathing end, the oxygen supply module is provided with a first oxygen shunt and a second oxygen shunt, the air supply module is provided with a first air shunt and a second air shunt, the first oxygen shunt and the first air shunt are respectively communicated to the driving gas switching valve, and the driving gas switching valve is communicated to the driving end module. Meanwhile, the invention also discloses a ventilation method of the anesthesia machine gas circuit system. The gas circuit system of the anesthesia machine provided by the invention can reduce the consumption of oxygen to a certain extent, reduce the pressure limit on an oxygen gas source and improve the stability of the anesthesia machine system.

Description

Anesthesia machine gas circuit system and ventilation method thereof

Technical Field

The invention belongs to the technical field of inhalation type anesthesia equipment, and particularly relates to a ventilation method of an anesthesia machine gas circuit system.

Background

Anesthesia is a method of temporarily unconsciousness of an organism, either wholly or locally, for surgical treatment. There are various methods for anesthesia, such as needle anesthesia, injection anesthesia, and inhalation anesthesia. The general anesthesia method used in hospitals is mainly inhalation anesthesia at present. Inhalation anesthesia has become increasingly sophisticated since 1846 where Langning was first anesthetized with ether. The development of modern pharmacology and the progress of science and technology, particularly the application of electronic computer technology, greatly improve the modern inhalation anesthesia level. The inhalation anesthesia is easy to control, safe and effective. Is the first choice when the operation is carried out in the current hospital. The anesthesia machine is an instrument for performing general anesthesia by using an inhalation anesthesia method.

Anesthesia machine in the current market is mainly with pneumatic electric control type, adopts gaseous drive anesthetic respiratory's bellows to provide sufficient pressure for patient's breathing, and the drive gas is mostly oxygen, can lead to a large amount of extravagant oxygen in-service use. Meanwhile, under the special condition that the oxygen supply pressure is insufficient or no oxygen exists, the machine cannot be used, and the use scene of the machine is limited.

Disclosure of Invention

The invention provides a ventilation method of an anesthesia machine gas circuit system, aiming at the problems of large oxygen consumption and limited use scene of the existing anesthesia machine.

The technical scheme adopted by the invention for solving the technical problems is as follows:

on one hand, the invention provides an anesthesia machine gas circuit system, which comprises an oxygen supply module, a laughing gas supply module, an air supply module, a driving gas switching valve, a breathing gas mixing module, a breathing end module and a driving end module, the drive end module is used for providing gas suction pressure of the breathing end, the oxygen supply module is provided with a first oxygen shunt and a second oxygen shunt, the air supply module is provided with a first air shunt and a second air shunt, the first oxygen shunt and the first air shunt are respectively communicated to the driving gas switching valve, the driving gas switching valve is communicated to the driving end module, the second oxygen shunt, the laughing gas supply module and the second air shunt are respectively communicated to the breathing gas mixing module, and the breathing gas mixing module is communicated to the breathing end module.

Optionally, the gas circuit system of the anesthesia apparatus further includes a first pressure reducing valve, a second pressure reducing valve, and a third pressure reducing valve, the second oxygen partial flow is connected to the breathing gas mixing module via the first pressure reducing valve, the laughing gas supply module is connected to the breathing gas mixing module via the second pressure reducing valve, and the air supply module is connected to the breathing gas mixing module via the third pressure reducing valve.

Optionally, the oxygen supply module includes a pipeline oxygen source supply branch, a standby oxygen source supply branch, and a first oxygen source selection switching valve, the pipeline oxygen source supply branch, the standby oxygen source supply branch, the first oxygen split stream, and the second oxygen split stream are respectively connected to the first oxygen source selection switching valve, and the first oxygen source selection switching valve is configured to switch oxygen supplies of the pipeline oxygen source supply branch and the standby oxygen source supply branch to the first oxygen split stream and the second oxygen split stream.

Optionally, the laughing gas supply module includes a pipeline laughing gas source supply branch, a standby laughing gas source supply branch and a second gas source selection switching valve, the pipeline laughing gas source supply branch and the standby laughing gas source supply branch are respectively connected to the second gas source selection switching valve, and the second gas source selection switching valve is used for switching the laughing gas supply of the pipeline laughing gas source supply branch and the standby laughing gas source supply branch.

Optionally, the air supply module includes a pipeline air source supply branch, a standby air source supply branch, and a third air source selection switching valve, the pipeline air source supply branch, the standby air source supply branch, the first air diversion, and the second air diversion are respectively connected to the third air source selection switching valve, and the third air source selection switching valve is configured to switch air supplies of the pipeline air source supply branch and the standby air source supply branch to the first air diversion and the second air diversion.

Optionally, the breathing gas mixing module includes system switch, oxygen laughing stop valve, flowmeter module, jar module and the ACGO switch module of volatilizing, the second oxygen reposition of redundant personnel via in proper order system switch with the oxygen laughing stop valve is connected to the flowmeter module, laughing gas supply module via the oxygen laughing stop valve is connected to the flowmeter module, the second air reposition of redundant personnel via system switch is connected to the flowmeter module, the flowmeter module is connected the jar module of volatilizing, the jar module of volatilizing is connected ACGO switch module, ACGO switch module connects the respiratory end module, ACGO switch module is provided with the ACGO interface.

Optionally, the breathing gas mixing module further includes a fast oxygenation pipeline, and the fast oxygenation pipeline is decomposed and communicated with the second oxygen shunt and the ACGO switch module.

Optionally, the driving end module includes an air box, and the driving gas switching valve is connected to the air box, the first oxygen shunt, and the first air shunt, respectively.

Optionally, the breathing end module comprises an inhalation pipeline and an exhalation pipeline, a first one-way valve, an oxygen concentration detection module and a first flow monitoring module are sequentially arranged on the inhalation pipeline, a second flow detection module, a second one-way valve, a carbon dioxide absorption device, an exhalation valve and a waste gas recovery module are sequentially arranged on the exhalation pipeline, and the air box is connected with the inhalation pipeline and the exhalation pipeline.

In another aspect, the present invention provides a ventilation method for an anesthesia machine airway system as described above, including the following steps:

the oxygen supply module outputs oxygen respectively through a first oxygen shunt and a second oxygen shunt, the air supply module outputs air respectively through the first air shunt and the second air shunt, and the laughing gas supply module outputs laughing gas;

switching the first oxygen split stream or the first air split stream as the driving gas of the driving end module by the driving gas switching valve;

the breathing gas mixing module is used for adjusting the proportion of oxygen, laughing gas and air supplied by the second oxygen shunt, the laughing gas supply module and the second air shunt and mixing the oxygen, the laughing gas and the air, the mixed gas is output to the breathing end module to be inhaled by a patient, and the driving end module is used for providing the gas inhalation pressure of the breathing end.

According to the gas circuit system of the anesthesia machine, the second oxygen shunt of the oxygen supply module and the second air shunt of the air supply module are simultaneously used as laughing gas mixed gas of the breathing end module of the anesthesia machine, so that the dependence of the gas circuit system of the anesthesia machine on oxygen can be reduced; meanwhile, the first oxygen shunt of the oxygen supply module and the first air shunt of the air supply module can be replaced as driving gas of the driving end module, and under different use scenes, an operator can selectively adopt air or oxygen through the driving gas switching valve to drive the driving end module so as to provide pressure required by the breathing end module to assist the patient in breathing, so that the consumption of oxygen can be reduced to a certain extent, the pressure limit on an oxygen gas source is reduced, and the stability of the anesthesia machine system is improved by replacing oxygen and air as the driving gas of the driving end module.

Drawings

Fig. 1 is a schematic block diagram of an anesthesia machine airway system provided by the present invention.

The reference numbers in the drawings of the specification are as follows:

1. an oxygen supply module; 1a, first oxygen shunting; 1b, second oxygen shunting; 11. a pipeline oxygen source supply branch; 12. a standby oxygen source supply branch; 13. a first gas source selection switch valve; 14. an oxygen pipeline high-pressure gas source inlet; 15. a first filter; 16. a first pressure relief valve; 17. a third check valve; 18. an oxygen standby gas source module; 19. a fourth check valve; 2. a laughing gas supply module; 21. a pipeline laughing gas source supply branch; 22. a standby laughing gas source supply branch; 23. a second gas source selection switching valve; 24. a laughing gas pipeline high-pressure gas source inlet; 25. a second filter; 26. a second pressure relief valve; 27. a fifth check valve; 28. a laughing gas standby gas source module; 29. a sixth check valve; 3. an air supply module; 3a, first air shunting; 3b, second air is divided; 31. a pipeline air source supply branch; 32. a backup air source supply branch; 33. a third gas source selection switching valve; 34. an air pipeline high-pressure air source inlet; 35. a third filter; 36. a third pressure relief valve; 37. a seventh check valve; 38. an air standby air source module; 39. an eighth check valve; 4. driving the gas switching valve; 5. a breathing gas mixing module; 51. a system switch; 52. an oxygen smile stop valve; 53. a flow meter module; 54. a volatilization pot module; 55. an ACGO switch module; 56. an ACGO interface; 6. a drive end module; 7. a respiratory end module; 71. a first check valve; 72. an oxygen concentration detection module; 73. a first flow monitoring module; 74. a second flow detection module; 75. a pressure detection device; 76. a second one-way valve; 77. a carbon dioxide absorbing device; 78. an exhalation valve; 79. an exhaust gas recovery module; 101. a first pressure reducing valve; 102. a second pressure reducing valve; 103. a third pressure reducing valve; 104. an oxygen flow meter; 105. an air flow meter.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, an embodiment of the present invention provides an anesthesia machine gas path system, including an oxygen supply module 1, a laughing gas supply module 2, an air supply module 3, a driving gas switching valve 4, a breathing gas mixing module 5, a breathing end module 7, and a driving end module 6, where the driving end module 6 is configured to provide a gas suction pressure at the breathing end, the oxygen supply module 1 has a first oxygen shunt 1a and a second oxygen shunt 1b, the air supply module 3 has a first air shunt 3a and a second air shunt 3b, the first oxygen shunt 1a and the first air shunt 3a are respectively conducted to the driving gas switching valve 4, the driving gas switching valve 4 is conducted to the driving end module 6, the second oxygen shunt 1b, the laughing gas supply module 2, and the second air shunt 3b are respectively conducted to the breathing gas mixing module 5, the breathing gas mixing module 5 is conducted to the breathing end module 7.

The second oxygen shunt 1b of the oxygen supply module 1 and the second air shunt 3b of the air supply module 3 are simultaneously used as laughing gas mixed gas of the anesthesia machine breathing end module 7, so that the dependence of an anesthesia machine gas path system on oxygen can be reduced; meanwhile, the first oxygen shunt 1a of the oxygen supply module 1 and the first air shunt 3a of the air supply module 3 can be replaced as the driving gas of the driving end module 6, and in different use scenarios, an operator can selectively use air or oxygen through the driving gas switching valve 4 to drive the driving end module 6, so as to provide the pressure required by the breathing end module 7 to assist the patient in breathing, which can reduce the consumption of oxygen to some extent and reduce the pressure limit on the oxygen gas source, and the replacement of oxygen and air as the driving gas of the driving end module 6 also improves the stability of the anesthesia machine system.

In an embodiment, the anesthesia machine gas circuit system further includes a first pressure reducing valve 101, a second pressure reducing valve 102, and a third pressure reducing valve 103, the second oxygen split stream 1b is connected to the breathing gas mixing module 5 via the first pressure reducing valve 101, the laughing gas supply module 2 is connected to the breathing gas mixing module 5 via the second pressure reducing valve 102, and the air supply module 3 is connected to the breathing gas mixing module 5 via the third pressure reducing valve 103.

The pressure difference between the first oxygen partial flow 1a and the second oxygen partial flow 1b is realized by arranging a first pressure reducing valve 101, and the pressure difference between the first air partial flow 3a and the second air partial flow 3b is realized by arranging a third pressure reducing valve 103, so that the first oxygen partial flow 1a and the first air partial flow 3a with higher air pressure can be provided when the driving end module 6 is driven to operate; when used as breathing gas, the second oxygen partial flow 1b and the second oxygen partial flow 1b are provided at a lower pressure, so that the same oxygen supply module 1 and air supply module 3 function as both driving power and breathing gas.

In an embodiment, an oxygen flow meter 104 is arranged on the second oxygen partial flow 1b and an air flow meter 105 is arranged on the second air partial flow 3b to monitor the oxygen and air flow on the second oxygen partial flow 1b and the second air partial flow 3b for subsequent control of the amount of oxygen and air supplied.

In an embodiment, the oxygen supply module 1 includes a pipeline oxygen source supply branch 11, a standby oxygen source supply branch 12, and a first oxygen source selection switching valve 13, where the pipeline oxygen source supply branch 11, the standby oxygen source supply branch 12, the first oxygen shunt 1a, and the second oxygen shunt 1b are respectively connected to the first oxygen source selection switching valve 13, and the first oxygen source selection switching valve 13 is configured to switch oxygen supplies of the pipeline oxygen source supply branch 11 and the standby oxygen source supply branch 12 to the first oxygen shunt 1a and the second oxygen shunt 1 b.

Specifically, an oxygen pipeline high-pressure gas source inlet 14, a first filter 15 and a third one-way valve 17 are sequentially arranged on the pipeline oxygen source supply branch 11, the oxygen pipeline high-pressure gas source inlet 14 is used for being connected to a high-pressure oxygen pipeline, the first filter 15 is used for filtering input high-pressure oxygen to prevent impurities from entering the pipeline oxygen source supply branch 11, and the third one-way valve 17 is used for preventing backflow and leakage of oxygen; the spare oxygen source supply branch 12 is sequentially provided with an oxygen spare gas source module 18 and a fourth one-way valve 19, the oxygen spare gas source module 18 is a detachable oxygen bottle or other oxygen storage or preparation devices, and the fourth one-way valve 19 is used for avoiding backflow and leakage of oxygen; the third check valve 17 and the fourth check valve 19 are connected to the first gas source selection switch valve 13, respectively.

When the oxygen pipeline high-pressure gas source inlet 14 and the oxygen standby gas source module 18 are simultaneously connected to gas sources, the pipeline gas source is preferentially selected to be supplied to a subsequent gas circuit system under the action of the first gas source selection switching valve 13; when only one of the oxygen source supply branch 11 and the standby oxygen source supply branch 12 is connected, the connected oxygen source is selected for oxygen supply, so that the switching of oxygen supply in different scenes can be adapted, and the normal and stable operation of the gas path system of the anesthesia machine can be ensured.

In an embodiment, a first pressure relief valve 16 is disposed on the pipeline oxygen source supply branch 11, and the first pressure relief valve 16 is configured to perform a pressure relief function when a pipeline oxygen source pressure is too high, so as to avoid a potential safety hazard caused by the too high pipeline pressure.

In an embodiment, the laughing gas supply module 2 includes a pipeline laughing gas source supply branch 21, a standby laughing gas source supply branch 22, and a second gas source selection switching valve 23, wherein the pipeline laughing gas source supply branch 21 and the standby laughing gas source supply branch 22 are respectively connected to the second gas source selection switching valve 23, and the second gas source selection switching valve 23 is configured to switch laughing gas supplies of the pipeline laughing gas source supply branch 21 and the standby laughing gas source supply branch 22.

Specifically, a laughing gas pipeline high-pressure gas source inlet 24, a second filter 25 and a fifth one-way valve 27 are sequentially arranged on the pipeline laughing gas source supply branch 21, the laughing gas pipeline high-pressure gas source inlet 24 is used for being connected with a high-pressure laughing gas pipeline, the second filter 25 is used for filtering input high-pressure laughing gas to prevent impurities from entering the pipeline laughing gas source supply branch 21, and the fifth one-way valve 27 is used for preventing laughing gas from flowing back and leaking; a standby laughing gas source module 28 and a sixth one-way valve 29 are sequentially arranged on the standby laughing gas source supply branch 22, the standby laughing gas source module 28 is a detachable laughing gas bottle or other laughing gas storage or preparation devices, and the sixth one-way valve 29 is used for avoiding backflow and leakage of laughing gas; the fifth check valve 27 and the sixth check valve 29 are respectively connected to the second air source selection switch valve 23.

When the laughing gas pipeline high-pressure gas source inlet 24 and the laughing gas standby gas source module 28 are simultaneously connected with gas sources, the pipeline gas source is preferentially selected to be supplied to a subsequent gas circuit system under the action of the second gas source selection switching valve 23; when only one of the pipeline laughing gas source supply branch 21 and the standby laughing gas source supply branch 22 is connected, the connected gas source is selected for laughing gas supply, the switching of laughing gas supply in different scenes can be adapted, and the normal and stable operation of an anesthesia machine gas path system is ensured.

In an embodiment, a second pressure release valve 26 is disposed on the pipeline laughing gas source supply branch 21, and the second pressure release valve 26 is configured to perform a pressure release function when the pressure of the pipeline laughing gas source is too high, so as to avoid a potential safety hazard caused by the too high pipeline pressure.

In an embodiment, the air supply module 3 includes a pipeline air source supply branch 31, a standby air source supply branch 32, and a third air source selection switching valve 33, the pipeline air source supply branch 31, the standby air source supply branch 32, the first air branch 3a, and the second air branch 3b are respectively connected to the third air source selection switching valve 33, and the third air source selection switching valve 33 is configured to switch air supplies of the pipeline air source supply branch 31 and the standby air source supply branch 32 to the first air branch 3a and the second air branch 3 b.

Specifically, the pipeline air source supply branch 31 is sequentially provided with an air pipeline high-pressure air source inlet 34, a third filter 35 and a seventh check valve 37, the air pipeline high-pressure air source inlet 34 is used for being connected to a high-pressure air pipeline, the third filter 35 is used for filtering input high-pressure air to prevent impurities from entering the pipeline air source supply branch 31, and the seventh check valve 37 is used for preventing air from flowing back and leaking; the spare air source supply branch 32 is sequentially provided with an air spare air source module 38 and an eighth one-way valve 39, the air spare air source module 38 is an air compressor or other high-pressure air supply devices, and the eighth one-way valve 39 is used for avoiding air backflow and leakage; the seventh check valve 37 and the eighth check valve 39 are respectively connected to the third air source selection switch valve 33.

When the air source is connected to the air pipe high-pressure air source inlet 34 and the air standby air source module 38 at the same time, the pipe air source is preferentially selected to be supplied to the subsequent air path system under the action of the third air source selection switching valve 33; when only one of the pipeline air source supply branch 31 and the standby air source supply branch 32 is connected, the connected air source is selected for air supply, so that the switching of air supply in different scenes can be adapted, and the normal and stable operation of an anesthesia machine air path system can be ensured.

In an embodiment, a third pressure release valve 36 is disposed on the pipeline air source supply branch 31, and the third pressure release valve 36 is configured to perform a pressure release function when the pipeline air source pressure is too high, so as to avoid a potential safety hazard caused by the too high pipeline pressure.

In an embodiment, the breathing Gas mixing module 5 includes a system switch 51, an oxygen shutoff valve 52, a flow meter module 53, a volatilization tank module 54, and an ACGO switch module 55(Auxiliary Common Gas Outlet), the second oxygen sub-stream 1b is connected to the flow meter module 53 via the system switch 51 and the oxygen shutoff valve 52 in sequence, the laughing Gas supply module 2 is connected to the flow meter module 53 via the oxygen shutoff valve 52, the second air sub-stream 3b is connected to the flow meter module 53 via the system switch 51, the flow meter module 53 is connected to the volatilization tank module 54, the volatilization tank module 54 is connected to the ACGO switch module 55, the ACGO switch module 55 is connected to the breathing end module 7, and the ACGO switch module 55 is provided with an ACGO interface 56.

The system switch 51 is used to control the air and oxygen supply of the second air partial flow 3b and the second oxygen partial flow 1b to the respiratory end module 7; the laughing gas stop valve 52 is used for adjusting the mixing ratio of oxygen and laughing gas, specifically, the flow of oxygen, laughing gas and air introduced into the volatilization tank module 54 is detected by the flow meter module 53, the laughing gas stop valve 52 controls the on-off of the second oxygen shunt 1b and the laughing gas supply module 2, the system switch 51 controls the on-off of the second air shunt 3b and the second oxygen shunt 1b, and the volatilization tank module 54 is used for mixing oxygen, laughing gas and air.

The ACGO switch module 55 is configured to switch the breathing gas between the breathing end module 7 and the ACGO interface 56, and deliver the fresh gas to the external artificial respiration system through the ACGO interface 56.

In an embodiment, the breathing gas mixing module 5 further comprises a fast oxygenation line in communication with the second oxygen split stream 1b and the ACGO switch module 55.

The fast oxygen charging pipeline is used for rapidly supplying oxygen to the ACGO switch module 55 by adopting the second oxygen shunt 1 b.

In an embodiment, the driving-end module 6 includes a bellows, the driving-gas switching valve 4 is connected to the bellows, the first oxygen shunt 1a and the first air shunt 3a are switched by the driving-gas switching valve 4 to serve as driving gas of the bellows, and the bellows provides an auxiliary pressure of the breathing-end module 7 to assist the patient to breathe, so as to ensure laughing gas to enter the lungs of the patient, and achieve a stable anesthetic effect.

In an embodiment, the respiratory module 7 includes an inhalation pipeline and an exhalation pipeline, the inhalation pipeline is sequentially provided with a first one-way valve 71, an oxygen concentration detection module 72 and a first flow monitoring module 73, the exhalation pipeline is sequentially provided with a second flow detection module 74, a second one-way valve 76, a carbon dioxide absorption device 77, an exhalation valve 78 and an exhaust gas recovery module 79, and the air box connects the inhalation pipeline and the exhalation pipeline.

When a patient inhales, the mixed gas in the volatilization tank module 54 reaches the end of the patient through the first one-way valve 71, the oxygen concentration detection module 72 and the first flow monitoring module 73, and the inhalation phase is completed; when the patient exhales, the exhaled gas enters the carbon dioxide absorption device 77 through the second flow detection module 74 and the second one-way valve 76 at the proximal end of the patient, and is exhausted through the exhalation valve 78 and the exhaust gas recovery module 79, so as to complete the exhalation phase.

In an embodiment, a pressure detecting device 75 is further disposed on the exhalation pipeline.

Another embodiment of the present invention provides a ventilation method for an anesthesia machine airway system as described above, which includes the following steps:

the oxygen supply module 1 outputs oxygen respectively through a first oxygen shunt 1a and a second oxygen shunt 1b, the air supply module 3 outputs air respectively through a first air shunt 3a and a second air shunt 3b, and the laughing gas supply module 2 outputs laughing gas;

controlling and switching the first oxygen partial flow 1a or the first air partial flow 3a as the driving gas of the driving end module 6 by the driving gas switching valve 4;

the breathing gas mixing module 5 is used for adjusting the proportion of oxygen, laughing gas and air supplied by the second oxygen shunt 1b, the laughing gas supply module 2 and the second air shunt 3b and mixing the oxygen, the laughing gas and the air, the mixed gas is output to the breathing end module 7 to be inhaled by a patient, and the driving end module 6 is used for providing the gas inhalation pressure of the breathing end.

Through setting up breathing gas mixing module 5 carries out the switching of breathing gas mixture, sets up simultaneously drive gas diverter valve 4 carries out the switching of drive end module 6's drive gas source, can effectively deal with the condition such as oxygen pressure is not enough or not have the oxygen supply, guarantees the steady operation of anesthesia machine, expands the applicable scene of anesthesia machine.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An anesthesia machine gas circuit system is characterized by comprising an oxygen supply module, a laughing gas supply module, an air supply module, a driving gas switching valve, a breathing gas mixing module, a breathing end module and a driving end module, the drive end module is used for providing gas suction pressure of the breathing end, the oxygen supply module is provided with a first oxygen shunt and a second oxygen shunt, the air supply module is provided with a first air shunt and a second air shunt, the first oxygen shunt and the first air shunt are respectively communicated to the driving gas switching valve, the driving gas switching valve is communicated to the driving end module, the second oxygen shunt, the laughing gas supply module and the second air shunt are respectively communicated to the breathing gas mixing module, and the breathing gas mixing module is communicated to the breathing end module.

2. The gas circuit system of claim 1, further comprising a first pressure reducing valve, a second pressure reducing valve, and a third pressure reducing valve, wherein the second oxygen partial flow is connected to the breathing gas mixing module via the first pressure reducing valve, the laughing gas supply module is connected to the breathing gas mixing module via the second pressure reducing valve, and the air supply module is connected to the breathing gas mixing module via the third pressure reducing valve.

3. The anesthesia machine gas circuit system of claim 1, wherein the oxygen supply module comprises a pipeline oxygen source supply branch, a standby oxygen source supply branch and a first gas source selection switching valve, the pipeline oxygen source supply branch, the standby oxygen source supply branch, the first oxygen shunt and the second oxygen shunt are respectively connected to the first gas source selection switching valve, and the first gas source selection switching valve is configured to switch oxygen supplies of the pipeline oxygen source supply branch and the standby oxygen source supply branch to the first oxygen shunt and the second oxygen shunt.

4. The gas circuit system of the anesthesia machine of claim 1, wherein the laughing gas supply module comprises a pipeline laughing gas source supply branch, a standby laughing gas source supply branch and a second gas source selection switching valve, the pipeline laughing gas source supply branch and the standby laughing gas source supply branch are respectively connected with the second gas source selection switching valve, and the second gas source selection switching valve is used for switching the laughing gas supply of the pipeline laughing gas source supply branch and the standby laughing gas source supply branch.

5. The anesthesia machine air circuit system of claim 1, wherein the air supply module comprises a pipeline air source supply branch, a backup air source supply branch and a third air source selection switch valve, the pipeline air source supply branch, the backup air source supply branch, the first air shunt and the second air shunt are respectively connected to the third air source selection switch valve, and the third air source selection switch valve is configured to switch the air supply of the pipeline air source supply branch and the backup air source supply branch to the first air shunt and the second air shunt.

6. The anesthesia machine gas circuit system of claim 1, wherein the breathing gas mixing module comprises a system switch, an oxygen smile stop valve, a flow meter module, a volatilization tank module and an ACGO switch module, the second oxygen split stream is connected to the flow meter module via the system switch and the oxygen smile stop valve in sequence, the laughing gas supply module is connected to the flow meter module via the oxygen smile stop valve, the second air split stream is connected to the flow meter module via the system switch, the flow meter module is connected to the volatilization tank module, the volatilization tank module is connected to the ACGO switch module, the ACGO switch module is connected to the breathing end module, and the ACGO switch module is provided with an ACGO interface.

7. The anesthesia machine gas circuit system of claim 6, wherein the breathing gas mixing module further comprises a rapid oxygenation line in de-operative communication with the second oxygen split stream and the ACGO switch module.

8. The anesthesia machine gas circuit system of claim 1, wherein the drive-end module comprises a bellows, and the drive gas switching valve is connected to the bellows, the first oxygen split stream and the first air split stream, respectively.

9. The anesthesia machine gas circuit system according to claim 8, wherein the breathing end module comprises an inhalation pipeline and an exhalation pipeline, the inhalation pipeline is sequentially provided with a first one-way valve, an oxygen concentration detection module and a first flow monitoring module, the exhalation pipeline is sequentially provided with a second flow detection module, a second one-way valve, a carbon dioxide absorption device, an exhalation valve and an exhaust gas recovery module, and the bellows is connected with the inhalation pipeline and the exhalation pipeline.

10. A ventilation method for an anesthesia machine airway system as in any of claims 1-9, comprising the following steps:

the oxygen supply module outputs oxygen respectively through a first oxygen shunt and a second oxygen shunt, the air supply module outputs air respectively through the first air shunt and the second air shunt, and the laughing gas supply module outputs laughing gas;

controlling and switching the first oxygen split stream or the first air split stream as the driving gas of the driving end module through the driving gas switching valve;

the breathing gas mixing module is used for adjusting the proportion of oxygen, laughing gas and air supplied by the second oxygen shunt, the laughing gas supply module and the second air shunt and mixing the oxygen, the laughing gas and the air, the mixed gas is output to the breathing end module to be inhaled by a patient, and the driving end module is used for providing the gas inhalation pressure of the breathing end.

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