Anaesthesia machine air path system and anaesthesia machine

Abstract

The utility model relates to the technical field of medical equipment, and discloses an anaesthesia machine gas path system and an anaesthesia machine, the anaesthesia machine gas path system can select a mechanical control branch to control the mixing proportion of various gas sources so as to output first mixed gas, or can select a mechanical control branch to control the mixing proportion of various gas sources so as to output second mixed gas. The electronic control branch is selected to control the mixing proportion of the multiple gas sources so as to output second mixed gas, and then the first mixed gas or the second mixed gas is provided through the breathing loop. Therefore, when the flow of the gas sources does not need to be accurately controlled, the mechanical control branch can be selected to control the mixing proportion of the multiple gas sources so as to output the first mixed gas, and when the flow of the gas sources needs to be accurately controlled, the electronic control branch can be selected to control the mixing proportion of the multiple gas sources so as to output the second mixed gas. Compared with an anaesthesia machine which only performs flow control through a mechanical needle valve in the prior art, the anaesthesia machine has the advantage that the purpose of improving the applicability of the anaesthesia machine can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an anesthesia machine gas path system and an anesthesia machine. Background Art

[0002] Anesthesia machines are one of the common medical devices in the medical field. They deliver anesthetic agents into a patient's body through the patient's breathing to anesthetize the patient. During the use of an anesthesia machine, it is necessary to control the flow rate of the anesthetic agent in the anesthesia machine. By controlling the flow rate of the anesthetic agent, not only can the patient inhale a sufficient amount of anesthetic agent to achieve an anesthetic effect, but also it can prevent the patient from inhaling insufficient anesthetic agent and failing to achieve the desired effect.

[0003] Currently, most common anesthesia machines use mechanical needle valves for flow control. However, during use, mechanical needle valves can only control the flow rate of the anesthetic agent in the anesthesia machine within a certain range. When strict control of the anesthetic agent flow rate is required, especially in the small-flow anesthetic agent ventilation mode, using a mechanical needle valve for flow control cannot meet the actual usage requirements. Therefore, existing anesthesia machines have poor applicability. Summary of the Utility Model

[0004] Embodiments of the present utility model provide a ventilator control system and a ventilator to solve the problem of poor applicability of anesthesia machines.

[0005] An anesthesia machine gas path system, the anesthesia machine gas path system includes: a gas source branch, a mechanical control branch, an electronic control branch, and a breathing circuit. Among them,

[0006] The intake end of the gas source branch is respectively connected to multiple gas sources;

[0007] The mechanical control branch is connected to the outlet end of the gas source branch. When the electronic control branch is closed, the mechanical control branch controls the mixing ratio of multiple gas sources to output a first mixed gas;

[0008] The electronic control branch is connected to the outlet end of the gas source branch. When the mechanical control branch is closed, the electronic control branch controls the mixing ratio of multiple gas sources to output a second mixed gas;

[0009] The intake end of the breathing circuit is connected to the common outlet end of the mechanical control branch and the electronic control branch. The first outlet end of the breathing circuit is used to provide the first mixed gas or the second mixed gas, and the second outlet end of the breathing circuit is used to exhale to the atmosphere.

[0010] For the above system, optionally,

[0011] The mechanical control branch includes a mechanical air control branch, a mechanical oxygen control branch, and a mechanical anesthesia control branch. A nitrous oxide cut-off valve is provided on the mechanical oxygen control branch and the mechanical anesthesia control branch. A mechanical needle valve, a one-way valve, and a gas flow meter are respectively provided on the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch. The common air outlet end of the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch is connected to the air inlet end of the breathing circuit. The air inlet end of the mechanical air control branch is connected to an air source. The oxygen inlet end of the mechanical oxygen control branch is connected to an oxygen source. The nitrous oxide inlet end of the mechanical anesthesia control branch is connected to a nitrous oxide source.

[0012] For the above system, optionally,

[0013] The electronic control branch includes an electronic air control branch, an electronic oxygen control branch, and an electronic anesthesia control branch. A proportional valve and a gas flow meter are provided on the electronic oxygen control branch. A proportional valve and a gas flow meter are provided at the common air outlet end of the electronic air control branch and the electronic anesthesia control branch. A switching valve and a one-way valve are respectively provided on the electronic air control branch, the electronic oxygen control branch, and the electronic anesthesia control branch. The air outlet end of the electronic oxygen control branch is connected to the air inlet end of the breathing circuit. The common air outlet end of the electronic air control branch and the electronic anesthesia control branch is connected to the air inlet end of the breathing circuit. The air inlet end of the electronic air control branch is connected to an air source. The oxygen inlet end of the electronic oxygen control branch is connected to an oxygen source. The nitrous oxide inlet end of the electronic anesthesia control branch is connected to a nitrous oxide source.

[0014] For the above system, optionally, the breathing circuit includes an inhalation branch and an exhalation branch, where

[0015] The inhalation branch is connected to the common air outlet end of the mechanical control branch and the electronic control branch. A gas flow meter, a vaporizer base, a one-way valve, an oxygen concentration sensor, an airway pressure gauge, an inhalation pressure sensor, and an inhalation flow sensor are provided at the air inlet end of the inhalation branch. The first mixed gas in the inhalation branch is mixed with the anesthetic gas in the vaporizer base to obtain a second mixed gas. The first air outlet end of the inhalation branch is used to provide the third mixed gas;

[0016] A one-way valve, a water collecting cup, an expiratory flow sensor, and an expiratory pressure sensor are provided on the expiratory branch. The first intake end of the expiratory branch communicates with the patient's lung air source, the second intake end of the expiratory branch communicates with the second outlet end of the inspiratory branch, and a carbon dioxide absorption device is provided between the second intake end of the expiratory branch and the second outlet end of the inspiratory branch. The first outlet end of the expiratory branch communicates with an auxiliary breathing branch, and the auxiliary breathing branch is used to assist the patient in breathing.

[0017] In the above system, optionally, a pressure relief valve, an ACGO switch, a gas path block pressure relief valve, and an ACGO outlet pressure sensor are provided at the intake end of the inspiratory branch. The intake end of the ACGO switch communicates with the intake end of the inspiratory branch. The first outlet end of the ACGO switch communicates with the outlet end of the inspiratory branch, and the second outlet end of the ACGO switch communicates with the gas path block pressure relief valve, the ACGO outlet pressure sensor, and the gas path block pressure relief valve.

[0018] In the above system, optionally, the auxiliary breathing branch includes a manual breathing branch, an electronically controlled breathing branch, and a switching switch. Among them,

[0019] The first outlet end of the expiratory branch communicates with the intake end of the switching switch. When the switching switch is switched to the manual breathing mode, the outlet end of the switching switch communicates with the intake end of the manual breathing branch. The outlet end of the manual breathing branch communicates with an exhaust gas discharge branch. The manual breathing branch includes a manual airbag and a pressure regulating and limiting valve. The exhaust gas discharge branch includes an air capacitor, a negative pressure one-way valve, and an exhaust gas treatment device;

[0020] When the switching switch is switched to the electronically controlled breathing mode, the outlet end of the switching switch communicates with the first intake end of the electronically controlled breathing branch. The second intake end of the electronically controlled breathing branch communicates with an oxygen gas source. The outlet end of the electronically controlled breathing branch is provided with a Pof-off valve, an expiratory valve, and a mechanical pressure relief valve, and communicates with the exhaust gas discharge branch. A filter, a gas path block pressure regulating valve, a driving gas proportional valve, a pressure sensor, a flow sensor, a gas path block pressure relief valve, a negative pressure valve, and a bellows are provided on the electronically controlled breathing branch;

[0021] Among them, the bellows includes a folding bladder and a box body. The outlet end of the switching switch communicates with the inner space of the folding bladder of the bellows. The outer space of the folding bladder of the bellows communicates with the oxygen gas source and the exhaust gas discharge branch.

[0022] In the above system, optionally, the electronically controlled breathing branch includes a PEEP control branch. A PEEP safety valve, a proportional valve, a PEEP pressure sensor, a gas resistance, and an air capacitor are provided on the PEEP control branch. The PEEP pressure sensor is connected to the expiratory valve on the electronically controlled breathing branch.

[0023] In the above system, optionally, the gas source branch includes an oxygen branch, a nitrous oxide branch, and an air branch. System switches are provided on the oxygen branch and the air branch. Among them,

[0024] The intake ends of the oxygen branch, the nitrous oxide branch, and the air branch are respectively connected to an oxygen gas source, a nitrous oxide gas source, and an air gas source. Filters, pipeline pressure sensors, pressure relief valves, check valves, and pressure regulating valves are respectively provided on the oxygen branch, the nitrous oxide branch, and the air branch;

[0025] The outlet ends of the oxygen branch, the nitrous oxide branch, and the air branch are respectively connected to the intake end of the mechanical control branch to provide an oxygen gas source, a nitrous oxide gas source, and an air gas source for the mechanical control branch respectively;

[0026] The outlet ends of the oxygen branch, the nitrous oxide branch, and the air branch are respectively connected to the intake end of the electronic control branch to provide an oxygen gas source, a nitrous oxide gas source, and an air gas source for the electronic control branch respectively;

[0027] Before the pressure regulating valve provided on the oxygen branch, a high-pressure oxygen output end is provided on the oxygen branch, and a check valve is provided on the high-pressure oxygen output end. After the pressure regulating valve provided on the oxygen branch, an auxiliary oxygen output end is provided on the oxygen branch, and an auxiliary flow meter and an auxiliary flow regulating valve are provided on the auxiliary oxygen output end;

[0028] After the pressure regulating valve provided on the air branch, an auxiliary air output end is provided on the air branch, and the auxiliary flow meter and the auxiliary flow regulating valve are provided on the auxiliary air output end.

[0029] In the above system, optionally, the anesthesia machine gas circuit system further includes: a rapid oxygen filling branch,

[0030] The intake end of the rapid oxygen filling branch is connected to the output end of the oxygen branch, the outlet end of the rapid oxygen filling branch is connected to the intake end of the breathing circuit, and a rapid oxygen filling switch is provided on the rapid oxygen filling branch.

[0031] An anesthesia machine includes the anesthesia machine gas circuit system according to any one of the above.

[0032] In summary, the present utility model discloses an anesthesia machine gas path system and an anesthesia machine. The anesthesia machine gas path system in the present utility model can select a mechanical control branch to control the mixing ratio of multiple gas sources to output a first mixed gas, or select an electronic control branch to control the mixing ratio of multiple gas sources to output a second mixed gas, and then provide the first mixed gas or the second mixed gas through the breathing circuit. It can be seen that in the present utility model, when it is not necessary to accurately control the gas source flow rate, the mechanical control branch can be selected to control the mixing ratio of multiple gas sources to output the first mixed gas; when it is necessary to accurately control the gas source flow rate, the electronic control branch can be selected to control the mixing ratio of multiple gas sources to output the second mixed gas. Compared with the anesthesia machine that only controls the flow rate through a mechanical needle valve in the prior art, the purpose of improving the applicability of the anesthesia machine can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 is a schematic structural diagram of an anesthesia machine gas path system disclosed in an embodiment of the present utility model;

[0035] Figure 2 is another schematic structural diagram of an anesthesia machine gas path system disclosed in an embodiment of the present utility model;

[0036] Among them, 1. gas source branch, 2. mechanical control branch, 3. electronic control branch, 4. breathing circuit, 5. auxiliary breathing branch, 6. nitrous oxide stop valve, 7. mechanical needle valve, 8. one-way valve, 9. gas flow meter, 10. proportional valve, 11. switching valve, 12. vaporizer base, 13. carbon dioxide absorption device, 14. oxygen concentration sensor, 15. airway pressure gauge, 16. inhalation pressure sensor, 17. inhalation flow sensor, 18. water cup, 19. exhalation flow sensor, 20. exhalation pressure sensor, 21. pressure relief valve, 22. ACGO switch, 23. airway block pressure relief valve, 24. ACGO outlet pressure sensor, 25. manual breathing branch, 26. electric control breathing branch, 27. switching switch, 28. exhaust gas emission branch, 2 9. Manual airbag, 30. Pressure regulating and limiting valve, 31. Gas container, 32. Negative pressure one-way valve, 33. Waste gas treatment device, 34. Pof-off valve, 35. Exhalation valve, 36. Filter, 37. Air circuit block pressure regulating valve, 38. Driving gas proportional valve, 39. Pressure sensor, 40. Flow sensor, 41. Bellows, 42. Negative pressure valve, 43. PEEP safety valve, 44. PEEP pressure sensor, 45. Air resistance, 46. Oxygen branch, 47. Laughing gas branch, 48. Air branch, 49. Auxiliary flow meter, 50. Auxiliary flow regulating valve, 51. Rapid oxygen filling switch, 52. Gas tank pressure gauge, 53. Gas tank pressure regulating valve, 54. Pressure reducer with built-in pressure relief valve, 55. Mechanical pressure relief valve, 56. Pipeline pressure sensor, 57. Pressure regulating valve. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] To thoroughly understand the present utility model, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present utility model. The preferred embodiments of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model can also have other embodiments.

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the disclosure pertains. It will be further understood that the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art, and will not be interpreted in an idealized or overly formal sense unless clearly defined herein.

[0042] The present utility model discloses an anesthesia machine gas path system and an anesthesia machine. In the anesthesia machine gas path system of the present utility model, the mechanical control branch 2 can be selected to control the mixing ratio of multiple gas sources to output a first mixed gas, or the electronic control branch 3 can be selected to control the mixing ratio of multiple gas sources to output a second mixed gas, and then the first mixed gas or the second mixed gas is provided through the breathing circuit 4. It can be seen that in the present utility model, when it is not necessary to accurately control the gas source flow rate, the mechanical control branch 2 can be selected to control the mixing ratio of multiple gas sources to output a first mixed gas. When it is necessary to accurately control the gas source flow rate, the electronic control branch 3 can be selected to control the mixing ratio of multiple gas sources to output a second mixed gas. Compared with the anesthesia machine that only controls the flow rate through the mechanical needle valve 7 in the prior art, the purpose of improving the applicability of the anesthesia machine can be achieved. The following is illustrated by specific embodiments.

[0043] As Figure 1 shown, it is a schematic structural diagram of an anesthesia machine gas path system disclosed in an embodiment of the present utility model. The anesthesia machine gas path system includes: a gas source branch 1, a mechanical control branch 2, an electronic control branch 3, and a breathing circuit 4, wherein,

[0044] The intake end of the gas source branch 1 is respectively communicated with multiple gas sources.

[0045] The mechanical control branch 2 is connected to the outlet end of the gas source branch 1. When the electronic control branch 3 is closed, the mechanical control branch 2 controls the mixing ratio of multiple gas sources to output a first mixed gas.

[0046] The electronic control branch 3 is connected to the outlet end of the gas source branch 1. When the mechanical control branch 2 is closed, the electronic control branch 3 controls the mixing ratio of multiple gas sources to output a second mixed gas.

[0047] The inlet end of the breathing circuit 4 is connected to the common outlet end of the mechanical control branch 2 and the electronic control branch 3. The first outlet end of the breathing circuit 4 is used to provide the first mixed gas or the second mixed gas, and the second outlet end of the breathing circuit 4 is used to exhale to the atmosphere.

[0048] Among them, the inlet end of the gas source branch 1 is connected to multiple gas sources including but not limited to an oxygen gas source, an air gas source, and a nitrous oxide gas source.

[0049] The working process of the above anesthetic machine gas path system: When the electronic control branch 3 is closed, the mechanical control branch 2 controls the mixing ratio of multiple gas sources to output a first mixed gas. During inhalation, the first mixed gas enters the breathing circuit 4 and enters the patient's body through the first outlet end of the breathing circuit 4. During exhalation, it exhales to the atmosphere through the second outlet end of the breathing circuit 4.

[0050] In practical applications, the anesthetic machine gas path system in this embodiment can close the mechanical control branch 2 or the electronic control branch 3 according to actual needs. When the mechanical control branch 2 needs to be used, the electronic control branch 3 is closed. When the electronic control branch 3 needs to be used, the mechanical control branch 2 is closed. For example, when the patient is young or middle-aged, the mechanical control branch 2 can be selected and the electronic control branch 3 is closed. When the patient is young or old, the electronic control branch 3 can be selected and the mechanical control branch 2 is closed. It should be noted that in this embodiment, the mechanical control branch 2 or the electronic control branch 3 can also be selected according to the actual condition of the patient, which can be determined according to the actual situation. The selection basis for the mechanical control branch 2 and the electronic control branch 3 in this embodiment is not specifically limited.

[0051] The utility model discloses an anesthesia machine gas circuit system. In the anesthesia machine gas circuit system of the utility model, the mechanical control branch 2 can be selected to control the mixing ratio of multiple gas sources to output a first mixed gas, or the electronic control branch 3 can be selected to control the mixing ratio of multiple gas sources to output a second mixed gas, and then the first mixed gas or the second mixed gas is provided through the breathing circuit 4. It can be seen that in the utility model, when it is not necessary to accurately control the gas source flow, the mechanical control branch 2 can be selected to control the mixing ratio of multiple gas sources to output a first mixed gas, and when it is necessary to accurately control the gas source flow, the electronic control branch 3 can be selected to control the mixing ratio of multiple gas sources to output a second mixed gas. Compared with the anesthesia machine that only controls the flow through the mechanical needle valve 7 in the prior art, the purpose of improving the applicability of the anesthesia machine can be achieved.

[0052] In one embodiment, as Figure 2 shown, the mechanical control branch 2 in this embodiment includes a mechanical air control branch, a mechanical oxygen control branch, and a mechanical anesthesia control branch. A nitrous oxide cut-off valve 6 is provided on the mechanical oxygen control branch and the mechanical anesthesia control branch. Mechanical needle valves 7, check valves 8, and gas flow meters 9 are respectively provided on the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch. The common outlet end of the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch is connected to the inlet end of the breathing circuit 4. The inlet end of the mechanical air control branch is connected to the air source, the inlet end of the mechanical oxygen control branch is connected to the oxygen source, and the inlet end of the mechanical anesthesia control branch is connected to the nitrous oxide source.

[0053] In practical applications, for the nitrous oxide cut-off valve 6 provided on the mechanical oxygen control branch and the mechanical anesthesia control branch, when the oxygen flow in the mechanical oxygen control branch decreases, the nitrous oxide cut-off valve 6 will synchronously control the nitrous oxide flow in the mechanical anesthesia control branch to decrease. When there is no oxygen supply in the mechanical oxygen control branch, the nitrous oxide cut-off valve 6 will synchronously control the mechanical anesthesia control branch to stop supplying. Mechanical needle valves 7, check valves 8, and gas flow meters 9 are respectively provided on the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch. Among them, the mechanical needle valves 7 on different branches respectively control the size of the gas flow in each branch through a mechanical structure. The check valve 8 is used to prevent the gas from flowing back in each branch, and the gas flow meter 9 is used to monitor the gas flow in each branch in real time. Nitrous oxide, oxygen, and air are mixed at the common outlet end of the mechanical air control branch, the mechanical oxygen control branch, and the mechanical anesthesia control branch to obtain a first mixed gas.

[0054] It should be noted that when it is necessary to close the mechanical control branch 2, controlling the mechanical needle valve 7 on each branch to close can achieve closing the mechanical control branch 2.

[0055] In summary, in this embodiment, by means of the nitrous oxide shut-off valve 6, it is possible to avoid the situations of excessive oxygen content and too low oxygen content when the oxygen gas source is exhausted, which is beneficial to improving the safety of the anesthesia machine equipment.

[0056] In one embodiment, as Figure 2 shown, the electronic control branch 3 in this embodiment includes an electronic air control branch, an electronic oxygen control branch, and an electronic anesthesia control branch. A proportional valve 10 and a gas flow meter 9 are provided on the electronic oxygen control branch. A proportional valve 10 and a gas flow meter 9 are provided at the common gas outlet end of the electronic air control branch and the electronic anesthesia control branch. A switching valve 11 and a one-way valve 8 are respectively provided on the electronic air control branch, the electronic oxygen control branch, and the electronic anesthesia control branch. The gas outlet end of the electronic oxygen control branch is communicated with the intake end of the breathing circuit 4. The common gas outlet end of the electronic air control branch and the electronic anesthesia control branch is communicated with the second intake end of the breathing circuit 4. The intake end of the electronic air control branch is communicated with the air gas source. The intake end of the electronic oxygen control branch is communicated with the oxygen gas source. The intake end of the electronic anesthesia control branch is communicated with the nitrous oxide gas source.

[0057] In practical applications, the switching valves 11 respectively provided on the electronic air control branch, the electronic oxygen control branch, and the electronic anesthesia control branch can respectively control the on / off of the electronic air control branch, the electronic oxygen control branch, and the electronic anesthesia control branch. The one-way valve 8 is used to prevent the gas from flowing back in each branch. The proportional valve 10 is used to control the gas flow rate of the electronic oxygen control branch. The gas flow meter 9 is used to monitor the gas flow rate in different branches in real time.

[0058] It should be noted that when it is necessary to close the electronic control branch 3, controlling the switching valves 11 on each branch to close can achieve closing the electronic control branch 3.

[0059] In summary, in this embodiment, the gas flow rate is controlled by the proportional valve 10. Compared with controlling the air flow rate by the mechanical needle valve 7, it can have higher control accuracy, is applicable to application scenarios with high requirements for gas flow rate accuracy, and is beneficial to improving the flow rate control accuracy of the anesthesia machine.

[0060] In one embodiment, as Figure 2 shown, the breathing circuit 4 in this embodiment includes an inhalation branch and an exhalation branch. Among them,

[0061] The inhalation branch is communicated with the common gas outlet end of the mechanical control branch 2 and the electronic control branch 3. A gas flow meter 9 and a vaporizer base 12 are provided at the intake end of the inhalation branch. The first mixed gas in the inhalation branch is mixed with the anesthetic gas in the vaporizer base 12 to obtain a second mixed gas. The first gas outlet end of the inhalation branch is used to provide a third mixed gas.

[0062] The first intake end of the exhalation branch is connected to the patient's lung air source, the second intake end of the exhalation branch is connected to the second outlet end of the inhalation branch, a carbon dioxide absorption device 13 is arranged between the second intake end of the exhalation branch and the second outlet end of the inhalation branch, and the first outlet end of the exhalation branch is connected to the auxiliary breathing branch 5, and the auxiliary breathing branch 5 is used to assist the patient in breathing.

[0063] Among them, other anesthetic gases used in combination with nitrous oxide are placed in the vaporizer base 12. The anesthetic gases in the vaporizer include but are not limited to sevoflurane (ether), and in addition, enflurane (ether), isoflurane (ether), desflurane (ether), methoxyflurane, etc. In addition, there may be one or more vaporizers on the vaporizer base 12. When there are multiple vaporizers, different anesthetic gases can be stored in different vaporizers. In this embodiment, the number of vaporizers on the vaporizer base 12 is not limited.

[0064] In practical applications, during inhalation, the first mixed gas of the mechanical control branch 2 or the second mixed gas of the electronic control branch 3, when passing through the inhalation branch, is mixed with the anesthetic gas in the vaporizer base 12 arranged on the inhalation branch to obtain a third mixed gas, and with the assistance of the auxiliary breathing branch 5, the third mixed gas is provided to the patient through the outlet end of the inhalation branch. During exhalation, exhalation is carried out through the exhalation branch to the auxiliary breathing branch 5, so as to exhale to the atmosphere through the auxiliary breathing branch 5. In addition, during the inhalation and exhalation processes of the patient, the carbon dioxide absorption device 13 can absorb carbon dioxide in the gas, reducing the oxygen concentration in the gas during inhalation and exhalation. Among them, the carbon dioxide absorption device 13 includes but is not limited to a soda lime canister.

[0065] In one embodiment, as Figure 2 shown, in this embodiment, a pressure relief valve 21, an ACGO switch 22, a gas path block pressure relief valve 23, and an ACGO outlet pressure sensor 24 are arranged at the intake end of the inhalation branch. The intake end of the ACGO switch 22 is connected to the intake end of the inhalation branch, the first outlet end of the ACGO switch 22 is connected to the outlet end of the inhalation branch, and the second outlet end of the ACGO switch 22 is connected to the gas path block pressure relief valve 23 and the ACGO outlet pressure sensor 24 and the gas path block pressure relief valve 23.

[0066] Among them, the ACGO switch 22 can switch the output direction of the fresh gas, whether it is output through the ACGO port or connected to the inhalation branch to the patient end.

[0067] In one embodiment, as Figure 2 shown, in this embodiment, the auxiliary breathing branch 5 includes an electronically controlled breathing branch 26, a manually controlled breathing branch 25, and a switch 27, where

[0068] The first air outlet end of the exhalation branch is connected to the air inlet end of the switching switch 27. When the switching switch 27 is switched to the manual breathing mode, the air outlet end of the switching switch 27 is connected to the air inlet end of the manual breathing branch 25, and the air outlet end of the manual breathing branch 25 is connected to the waste gas discharge branch 28. The manual breathing branch 25 includes a manual airbag 29 and a pressure regulating and limiting valve 30 (APL valve). The waste gas discharge branch 28 includes an air capacitance 31, a negative pressure check valve 32, and a waste gas treatment device 33;

[0069] When the switching switch 27 is switched to the electronic control breathing mode, the air outlet end of the switching switch 27 is connected to the first air inlet end of the electronic control breathing branch 26. The second air inlet end of the electronic control breathing branch 26 is connected to an oxygen gas source. The air outlet end of the electronic control breathing branch 26 is provided with a Pof-off valve 34, an exhalation valve 35, and a mechanical pressure relief valve 55, and is connected to the waste gas discharge branch 28. A filter 36, an air path block pressure regulating valve 37, a driving gas proportional valve 38, a pressure sensor 39, a flow sensor 40, an air path block pressure relief valve 23, a negative pressure valve 42, and a bellows 41 are arranged on the electronic control breathing branch 26;

[0070] Among them, the bellows 41 includes a folding bladder and a box body. The air outlet end of the switching switch 27 is connected to the inner space of the folding bladder of the bellows 41, and the outer space of the folding bladder of the bellows 41 is connected to the oxygen gas source and the waste gas discharge branch 28.

[0071] In practical applications, when the switching switch 27 is switched to the manual breathing mode, the gas exhaled by the patient enters the manual airbag 29 in the manual breathing branch 25. When the patient inhales, by manually squeezing the manual airbag 29, it assists the patient in inhaling. When the patient inhales, by squeezing the manual airbag 29, the gas in the manual airbag 29 is squeezed into the patient's lungs, and at the same time, the anesthetic gas is also squeezed into the patient's lungs. When the switching switch 27 is switched to the electronic control breathing mode, the gas exhaled by the patient enters the inner space of the folding bladder of the bellows 41 in the electronic control breathing branch 26. When the patient inhales, the driving gas proportional valve 38 drives oxygen into the outer space of the folding bladder of the bellows 41, so that while squeezing the gas in the inner space of the folding bladder into the patient's lungs, the anesthetic gas is also squeezed into the patient's lungs. Thus, when the patient is completely anesthetized and unable to breathe independently, the purpose of assisting the patient in breathing can be achieved.

[0072] In one embodiment, as Figure 2 shown, the electronic control breathing branch 26 in this embodiment includes a PEEP control branch. A PEEP safety valve 43, a proportional valve 10, a PEEP pressure sensor 44, an air resistance 45, and an air capacitance 31 are arranged on the PEEP control branch. The PEEP pressure sensor 44 is connected to the exhalation valve 35 on the electronic control breathing branch 26.

[0073] In one embodiment, as Figure 2As shown, the gas source branch 1 in this embodiment includes an oxygen branch 46, a nitrous oxide branch 47 and an air branch 48, and a system switch is provided on the oxygen branch 46 and the air branch 48, wherein:

[0074] The air inlet ends of the oxygen branch 46, the nitrous oxide branch 47 and the air branch 48 are connected to the oxygen source, the nitrous oxide source and the air source respectively, and the oxygen branch 46, the nitrous oxide branch 47 and the air branch 48 are respectively provided with a filter 36, a pipeline pressure sensor 56, a pressure relief valve 21, a check valve 8 and a pressure regulating valve 57;

[0075] The gas outlet ends of the oxygen branch 46, the laughing gas branch 47 and the air branch 48 are respectively connected to the gas inlet end of the mechanical control branch 2, so as to provide the mechanical control branch 2 with oxygen gas source, laughing gas gas source and air gas source respectively;

[0076] The gas outlet ends of the oxygen branch 46, the laughing gas branch 47 and the air branch 48 are respectively connected to the gas inlet end of the electronic control branch 3, so as to provide the electronic control branch 3 with oxygen gas source, laughing gas gas source and air gas source respectively;

[0077] Before the pressure regulating valve 57 provided on the oxygen branch 46, a high-pressure oxygen output end is provided on the oxygen branch 46, and a one-way valve 8 is provided on the high-pressure oxygen output end; after the pressure regulating valve 57 provided on the oxygen branch 46, an auxiliary oxygen output end is provided on the oxygen branch 46, and an auxiliary flow meter 49 and an auxiliary flow regulating valve 50 are provided on the auxiliary oxygen output end;

[0078] Before the pressure regulating valve 57 provided on the air branch 48 , an auxiliary air output terminal is provided on the oxygen branch 46 , and an auxiliary flow meter 49 and an auxiliary flow regulating valve 50 are provided on the auxiliary air output terminal.

[0079] In addition, an oxygen tank branch, a nitrous oxide tank branch and an air tank branch may be respectively provided on the oxygen branch 46, the nitrous oxide branch 47 and the air branch 48 in the present embodiment; the air inlet end of the oxygen tank branch is connected to a spare oxygen tank, the air inlet end of the nitrous oxide tank branch is connected to a spare nitrous oxide tank, the air inlet end of the air tank branch is connected to a spare air pipe, and a filter 36, a gas tank pressure gauge 52, a gas tank pressure regulating valve 53, a pressure reducer with a built-in pressure relief valve 54 and a one-way valve 8 are respectively provided on the oxygen tank branch, the nitrous oxide tank branch and the air tank branch.

[0080] In one embodiment, Figure 2 As shown, the anesthesia machine gas circuit system in this embodiment also includes: a rapid oxygenation branch,

[0081] The air inlet end of the rapid oxygen filling branch is connected to the output end of the oxygen branch 46 , and the air outlet end of the rapid oxygen filling branch is connected to the air inlet end of the breathing circuit 4 .

[0082] In one implementation, the present utility model discloses an anesthesia machine, which includes the anesthesia machine gas path system of any of the above embodiments.

[0083] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be included in the protection scope of the present utility model.

Claims

1. An anesthesia machine gas circuit system, characterized in that: The anesthesia machine gas circuit system includes: a gas source branch, a mechanical control branch, an electronic control branch and a breathing circuit, wherein: The air inlet ends of the air source branches are respectively connected to multiple gas sources; The mechanical control branch is connected to the gas outlet end of the gas source branch, and when the electronic control branch is closed, the mechanical control branch controls the mixing ratio of the multiple gas sources to output a first mixed gas; The electronic control branch is connected to the gas outlet end of the gas source branch, and when the mechanical control branch is closed, the electronic control branch controls the mixing ratio of the multiple gas sources to output a second mixed gas; The air inlet end of the breathing circuit is connected to the common air outlet end of the mechanical control branch and the electronic control branch. The first air outlet end of the breathing circuit is used to provide the first mixed gas or the second mixed gas. The second air outlet end of the breathing circuit is used to exhale to the atmosphere.

2. The anesthesia machine gas circuit system according to claim 1, characterized in that: The mechanical control branch includes a mechanical air control branch, a mechanical oxygen control branch and a mechanical anesthesia control branch. The mechanical oxygen control branch and the mechanical anesthesia control branch are provided with a nitrous oxide stop valve. The mechanical air control branch, the mechanical oxygen control branch and the mechanical anesthesia control branch are respectively provided with a mechanical needle valve, a one-way valve and a gas flow meter. The common air outlet end of the mechanical air control branch, the mechanical oxygen control branch and the mechanical anesthesia control branch is connected to the air inlet end of the breathing circuit, the air inlet end of the mechanical air control branch is connected to an air source, the air inlet end of the mechanical oxygen control branch is connected to an oxygen source, and the air inlet end of the mechanical anesthesia control branch is connected to a nitrous oxide source.

3. The anesthesia machine gas circuit system according to claim 1, characterized in that: The electronic control branch includes an electronic air control branch, an electronic oxygen control branch and an electronic anesthesia control branch. A proportional valve and a gas flow meter are arranged on the electronic oxygen control branch. A proportional valve and a gas flow meter are arranged on the common air outlet of the electronic air control branch and the electronic anesthesia control branch. A switching valve and a one-way valve are arranged on the electronic air control branch, the electronic oxygen control branch and the electronic anesthesia control branch respectively. The air outlet of the electronic oxygen control branch is connected to the air inlet of the breathing circuit. The common air outlet of the electronic air control branch and the electronic anesthesia control branch is connected to the air inlet of the breathing circuit. The air inlet of the electronic air control branch is connected to an air source. The air inlet of the electronic oxygen control branch is connected to an oxygen source. The air inlet of the electronic anesthesia control branch is connected to a laughing gas source.

4. The anesthesia machine gas circuit system according to claim 1, characterized in that: The breathing circuit includes an inspiratory branch and an expiratory branch, wherein: The inhalation branch is connected to the common gas outlet of the mechanical control branch and the electronic control branch. A gas flow meter, a vaporizer base, a one-way valve, an oxygen concentration sensor, an airway pressure gauge, an inhalation pressure sensor and an inhalation flow sensor are arranged on the gas inlet of the inhalation branch. The first mixed gas in the inhalation branch is mixed with the anesthetic gas in the vaporizer base to obtain a second mixed gas. The first gas outlet of the inhalation branch is used to provide a third mixed gas. The exhalation branch is provided with a one-way valve, a water accumulation cup, an exhalation flow sensor, and an exhalation pressure sensor. The first air inlet end of the exhalation branch is connected to the patient's lung air source, the second air inlet end of the exhalation branch is connected to the second air outlet end of the inhalation branch, a carbon dioxide absorption device is provided between the second air inlet end of the exhalation branch and the second air outlet end of the inhalation branch, the first air outlet end of the exhalation branch is connected to an auxiliary breathing branch, and the auxiliary breathing branch is used to assist the patient in breathing.

5. The anesthesia machine gas circuit system according to claim 4, characterized in that: The air inlet end of the air intake branch is provided with a pressure relief valve, an ACGO switch, an air circuit block pressure relief valve and an ACGO outlet pressure sensor. The air inlet end of the ACGO switch is connected to the air inlet end of the air intake branch, the first air outlet end of the ACGO switch is connected to the air outlet end of the air intake branch, and the second air outlet end of the ACGO switch is connected to the air circuit block pressure relief valve, the ACGO outlet pressure sensor and the air circuit block pressure relief valve.

6. The anesthesia machine gas circuit system according to claim 4, characterized in that: The auxiliary breathing branch includes a manual breathing branch, an electric-controlled breathing branch and a switch, wherein: The first air outlet end of the exhalation branch is connected to the air inlet end of the switching switch. When the switching switch is switched to the manual breathing mode, the air outlet end of the switching switch is connected to the air inlet end of the manual breathing branch, and the air outlet end of the manual breathing branch is connected to the exhaust gas discharge branch. The manual breathing branch includes a manual air bag and a pressure regulating and limiting valve. The exhaust gas discharge branch includes an air volume, a negative pressure one-way valve and an exhaust gas treatment device. When the switch is switched to the electronically controlled breathing mode, the air outlet of the switch is connected to the first air inlet of the electronically controlled breathing branch, the second air inlet of the electronically controlled breathing branch is connected to the oxygen source, the air outlet of the electronically controlled breathing branch is provided with a Pof-off valve, an exhalation valve and a mechanical pressure relief valve, and is connected to the exhaust gas discharge branch, and the electronically controlled breathing branch is provided with a filter, an air circuit block pressure regulating valve, a driving gas proportional valve, a pressure sensor, a flow sensor, an air circuit block pressure relief valve, a negative pressure valve and a bellows; The bellows comprises a folding bag and a box body, the air outlet end of the switching switch is connected to the space inside the folding bag of the bellows, and the space outside the folding bag of the bellows is connected to the oxygen source and the exhaust gas discharge branch.

7. The anesthesia machine gas circuit system according to claim 6, characterized in that: The electrically controlled breathing branch comprises a PEEP control branch, on which a PEEP safety valve, a proportional valve, a PEEP pressure sensor, an air resistance and an air capacity are arranged, and the PEEP pressure sensor is connected to the exhalation valve on the electrically controlled breathing branch.

8. The anesthesia machine gas circuit system according to claim 1, characterized in that: The gas source branch includes an oxygen branch, a nitrous oxide branch and an air branch, and a system switch is provided on the oxygen branch and the air branch, wherein: The air inlet ends of the oxygen branch, the laughing gas branch and the air branch are connected to an oxygen source, a laughing gas source and an air source respectively, and the oxygen branch, the laughing gas branch and the air branch are respectively provided with a filter, a pipeline pressure sensor, a pressure relief valve, a one-way valve and a pressure regulating valve; The gas outlet ends of the oxygen branch, the laughing gas branch and the air branch are respectively connected to the gas inlet end of the mechanical control branch, so as to provide the mechanical control branch with an oxygen gas source, a laughing gas gas source and an air gas source respectively; The gas outlet ends of the oxygen branch, the laughing gas branch and the air branch are respectively connected to the gas inlet end of the electronic control branch, so as to provide the electronic control branch with an oxygen gas source, a laughing gas gas source and an air gas source respectively; Before the pressure regulating valve provided on the oxygen branch, a high-pressure oxygen output end is provided on the oxygen branch, and a one-way valve is provided on the high-pressure oxygen output end; after the pressure regulating valve provided on the oxygen branch, an auxiliary oxygen output end is provided on the oxygen branch, and an auxiliary flow meter and an auxiliary flow regulating valve are provided on the auxiliary oxygen output end; After the pressure regulating valve arranged on the air branch line, an auxiliary air output end is arranged on the air branch line, and the auxiliary air output end is arranged on the auxiliary flow meter and the auxiliary flow regulating valve.

9. The anesthesia machine gas circuit system according to claim 8, characterized in that: The anesthesia machine gas circuit system also includes: a rapid oxygenation branch, The air inlet end of the rapid oxygenation branch is connected to the output end of the oxygen branch, the air outlet end of the rapid oxygenation branch is connected to the air inlet end of the breathing circuit, and a rapid oxygenation switch is provided on the rapid oxygenation branch.

10. An anesthesia machine, characterized in that: The anesthesia machine comprises the anesthesia machine gas circuit system according to any one of claims 1-9.

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