WO2024255737A1 - 一种麻醉机 - Google Patents
一种麻醉机 Download PDFInfo
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- WO2024255737A1 WO2024255737A1 PCT/CN2024/098486 CN2024098486W WO2024255737A1 WO 2024255737 A1 WO2024255737 A1 WO 2024255737A1 CN 2024098486 W CN2024098486 W CN 2024098486W WO 2024255737 A1 WO2024255737 A1 WO 2024255737A1
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- air
- gas branch
- fresh gas
- compression device
- flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes specially adapted for anaesthetising
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
- A61M16/024—Control means therefor including calculation means, e.g. using a processor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
- A61M16/0069—Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0883—Circuit type
- A61M16/0891—Closed circuit, e.g. for anaesthesia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
- A61M16/18—Vaporising devices for anaesthetic preparations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/201—Controlled valves
- A61M16/202—Controlled valves electrically actuated
- A61M16/203—Proportional
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
- A61M16/209—Relief valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/22—Carbon dioxide-absorbing devices ; Other means for removing carbon dioxide
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/02—Gases
- A61M2202/0208—Oxygen
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/02—Gases
- A61M2202/0266—Nitrogen (N)
- A61M2202/0283—Nitrous oxide (N2O)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/50—General characteristics of the apparatus with microprocessors or computers
- A61M2205/502—User interfaces, e.g. screens or keyboards
Definitions
- the present invention relates to the field of medical equipment, and in particular to an anesthesia machine.
- Anesthesia machines are used to provide anesthetics and respiratory support to patients.
- Modern anesthesia machines are generally composed of a gas source, a flow meter, a vaporizer, a patient circuit, an anesthesia ventilator and an AGSS (anesthetic gas absorption system).
- the gas source provides O 2 (oxygen), Air (air), and N 2 O (laughing gas) to the patient's inhaled gas.
- the flow meter controls the flow rate and oxygen concentration of the gas inhaled by the patient.
- the vaporizer controls the concentration of anesthetic in the gas inhaled by the patient.
- the patient circuit delivers fresh gas containing O2 and anesthetics to the patient for inhalation, while receiving the patient's exhaled gas to transfer excess waste gas to the AGSS, and reuse most of the exhaled gas after removing CO2 .
- Anesthesia ventilators provide respiratory support to patients, controlling the volume or pressure of gas inhaled by the patient, as well as the breathing rhythm.
- AGSS collects excess gas exhaled by patients and connects it to the hospital's waste gas treatment system for waste gas treatment.
- the types of gas sources for modern anesthesia machines include O2 , Air, and N2O . It is easy to understand that O2 is indispensable, otherwise it will cause the patient to suffer from respiratory hypoxia. However, inhaling oxygen alone is risky. Studies have shown that long-term inhalation of pure oxygen can lead to oxygen poisoning.
- the role of Air is to reduce the oxygen concentration in fresh gas, which is especially important during long-term surgery.
- N2O is a mild anesthetic gas, and its application frequency varies greatly in different countries.
- the gas source can be connected through the hospital's central gas supply system, or it can be provided by high-pressure gas cylinders. High-pressure gas cylinders are generally used as a backup gas source. When the hospital's central gas supply system fails, the gas stored in the high-pressure gas cylinders can be used to input the gas source for the anesthesia machine.
- Air central gas supply system Air is used to reduce the oxygen concentration of the gas inhaled by the patient, and it is increasingly valued today as safe anesthesia is increasingly advocated.
- air can only be provided by air cylinders as a backup gas source.
- air cylinder gas is expensive, and the transportation, storage and management of high-pressure gas brings risks and increased costs.
- medical institutions with Air central gas supply systems still have the problem of using high-pressure air cylinder gas when the Air central gas supply system fails.
- the existing anesthesia machines that use air cylinders as backup gas sources have problems such as management risks and high costs, and need to be improved and enhanced.
- the present invention mainly provides an anesthesia machine which does not need to use an air cylinder as a backup gas source, thereby reducing management risks and costs.
- One embodiment provides an anesthesia machine, including:
- a first fresh gas branch for providing oxygen and/or laughing gas
- the second fresh gas branch is connected to an air compressor for providing air; the air flow rate provided by the air compressor is adjustable;
- the first fresh gas branch and the second fresh gas branch are both connected to an anesthetic delivery device, and the anesthetic delivery device is used to mix anesthetic, oxygen and/or nitrous oxide provided by the first fresh gas branch, and air provided by the second fresh gas branch to obtain a first mixed gas;
- a breathing circuit for receiving the first mixed gas output by the anesthetic delivery device, and delivering the first mixed gas to a patient;
- a detection device used to detect a characteristic variable characterizing air flow characteristics of the second fresh gas branch
- the processor is used to adjust the air flow provided by the air compression device according to the characterization quantity output by the detection device.
- One embodiment provides an anesthesia machine, including:
- a first fresh gas branch for providing oxygen and/or laughing gas
- the second fresh gas branch is connected to an air compressor for providing air; the air flow rate provided by the air compressor is adjustable;
- the first fresh gas branch and the second fresh gas branch are both connected to an anesthetic delivery device, and the anesthetic delivery device is used to mix anesthetic, oxygen and/or nitrous oxide provided by the first fresh gas branch, and air provided by the second fresh gas branch to obtain a first mixed gas;
- a breathing circuit for receiving the first mixed gas provided by the anesthetic delivery device
- a ventilation control device used for controlling the breathing circuit to deliver the first mixed gas to the patient, thereby providing anesthesia breathing support for the patient;
- a human-computer interaction device used for receiving a target flow setting value input by a user
- the processor is used to adjust the air flow provided by the air compression device according to the target flow setting value.
- One embodiment provides an anesthesia machine, including:
- a first fresh gas branch for providing oxygen and/or laughing gas
- a second valve used to support a user to manually adjust the air flow of the second fresh gas branch
- the first fresh gas branch and the second fresh gas branch are both connected to an anesthetic delivery device, and the anesthetic delivery device is used to mix anesthetic, oxygen and/or nitrous oxide provided by the first fresh gas branch, and air provided by the second fresh gas branch to obtain a first mixed gas;
- a breathing circuit for receiving the first mixed gas output by the anesthetic delivery device, and delivering the first mixed gas to a patient;
- a detection device used to detect an opening characteristic value of the second valve
- the processor is used to adjust the output capacity of the air compression device according to the change of the opening characterization quantity.
- An embodiment provides an anesthesia machine, comprising:
- a first fresh gas branch for providing oxygen and/or laughing gas
- the second fresh gas branch is connected to an air compressor for providing air;
- the first fresh gas branch and the second fresh gas branch are both connected to an anesthetic delivery device, and the anesthetic delivery device is used to mix anesthetic, oxygen and/or nitrous oxide provided by the first fresh gas branch, and air provided by the second fresh gas branch to obtain a first mixed gas;
- a breathing circuit used for receiving the first mixed gas output by the anesthetic delivery device
- One end of the driving gas branch is connected to the air compression device, and the other end is connected to the breathing circuit; the driving gas branch is used to use the air provided by the air compression device as the driving gas, and periodically drive the breathing circuit to deliver the first mixed gas to the patient; or, the anesthesia machine also includes another air compression device, one end of the driving gas branch is connected to the other air compression device, and the other end is connected to the breathing circuit; the driving gas branch is used to use the air provided by the other air compression device as the driving gas, and periodically drive the breathing circuit to deliver the first mixed gas to the patient.
- the second fresh gas branch is connected to an air compressor with adjustable air flow, and the air compressor provides air to the second fresh gas branch, so that there is no need to use an air cylinder as a backup air source, reducing management risks and costs.
- the detection device detects a characterization quantity that characterizes the air flow characteristics of the second fresh gas branch; the processor adjusts the air flow provided by the air compressor according to the characterization quantity, so that the air compressor does not need to work at full load, thereby increasing the use time of the air compressor.
- FIG1 is a structural block diagram of an anesthesia machine according to an embodiment of the present invention.
- FIG2 is a structural block diagram of an anesthesia machine according to an embodiment of the present invention.
- FIG3 is a gas circuit diagram of an air compression device and a portion of a second fresh gas branch in an anesthesia machine provided by the present invention
- FIG4 is a working process of an anesthesia machine according to an embodiment of the present invention.
- FIG5 is a flow chart of an embodiment of step 3 in FIG4;
- FIG6 is a structural block diagram of an embodiment of a detection device in an anesthesia machine provided by the present invention.
- FIG7 is a structural block diagram of an embodiment of an air compression device, a ventilation control device and a breathing circuit in an anesthesia machine provided by the present invention
- FIG8 is a structural block diagram of another embodiment of an air compression device, a ventilation control device and a breathing circuit in the anesthesia machine provided by the present invention.
- FIG9 is a structural block diagram of an anesthesia machine according to an embodiment of the present invention.
- FIG. 10 is a structural block diagram of another embodiment of the anesthesia machine provided by the present invention.
- connection and “coupling” mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).
- the present invention integrates a fresh gas branch inside the anesthesia machine, which is connected to an air compressor and can provide air.
- the anesthesia machine of the present invention can output fresh gas without an external central gas supply system or a high-pressure gas cylinder. It can also be used as a backup gas source to replace the high-pressure air cylinder, with basically no management risk and low cost.
- the following is a detailed description through some specific embodiments.
- the anesthesia machine provided by the present invention includes a processor 20 , a first fresh gas branch 30 , a second fresh gas branch 40 , a breathing circuit 80 , a ventilation control device 90 and a detection device 60 .
- the first fresh gas branch 30 is used to provide oxygen and/or laughing gas.
- the first fresh gas branch 30 may include an oxygen interface and/or a laughing gas interface.
- the oxygen interface is used to connect an external oxygen source or an internal oxygen source.
- An external oxygen source such as an oxygen pipeline or an oxygen cylinder in a central gas supply system, can provide oxygen to the anesthesia machine by docking with the oxygen interface.
- An internal oxygen source may include an oxygen generator, etc., which provides oxygen to the anesthesia machine by docking with the oxygen interface.
- An external laughing gas source such as a laughing gas pipeline or a laughing gas cylinder in a central gas supply system, can provide laughing gas to the anesthesia machine by docking with the laughing gas interface.
- the first fresh gas branch 30 may also include one or more valves, some of which are used to adjust the flow of oxygen, and some of which are used to adjust the flow of laughing gas.
- the second fresh gas branch 40 is connected to the air compression device 10.
- the second fresh gas branch 40 can be directly connected to the output end of the air compression device 10, or can be indirectly connected to the output end of the air compression device 10, as long as it can achieve communication with the output end of the air compression device 10.
- the second fresh gas branch 40 is used to provide air, such as providing air to the anesthetic delivery device 70 at the rear end.
- the air compression device 10 is used to compress air, for example, to obtain air from the external environment and compress it, and to provide the compressed air to the second fresh gas branch 40.
- the output capacity of the air compression device 10 is adjustable, for example, the air flow rate it provides is adjustable or the output air flow rate is adjustable.
- the air compression device 10 can be built into the housing of the anesthesia machine or can be placed outside the housing of the anesthesia machine. This embodiment is described using the former as an example, that is, in this embodiment, the anesthesia
- the intoxication machine includes or has an air compression device 10 built in.
- the anesthesia machine may also include an air interface.
- the air interface is used to receive air provided from the outside, such as for connecting to an external air source.
- An external air source such as an air duct in a central air supply system, can provide air to the anesthesia machine by docking with the air interface.
- the air interface and the air compression device 10 are selectively connected to the second fresh gas branch 40.
- the anesthesia machine can be used in a hospital by connecting the hospital's air duct to the air interface, and the anesthesia machine obtains fresh air from the hospital's central air supply system, with the air compression device 10 serving as a backup air source.
- the air compression device 10 is started to provide air.
- the air compression device 10 can have multiple types according to the different ways of compressing air.
- the air can be compressed by the rotation of the blades, or by the reciprocating motion of the piston. Therefore, its adjustable output capacity can be adjustable speed, or the stroke or frequency of the reciprocating motion can be adjustable. From the perspective of work, the output power is adjustable, and from the perspective of the effect, the provided (output) air flow rate is adjustable.
- the air compression device 10 includes: an air pump 130 with adjustable speed.
- the air compression device 10 may also include a turbine or an air compressor, etc.
- the anesthesia machine may have an air inlet 110, a first filter 120, and a second filter 150. The air inlet 110, the first filter 120, the air pump 130, and the second filter 150 are connected in sequence.
- the air inlet 110 is connected to the atmosphere.
- the air pump 130 When the air pump 130 is working, external air enters from the air inlet 110, and enters the air compression device 10 after being filtered by the first filter 120.
- the air pump 130 is used to compress the air entering the air inlet 110 and output it to the second fresh gas branch 40.
- the first filter 120 is arranged between the air inlet 110 and the air pump 130, and is used to filter the air that is about to enter the air pump 130.
- the second filter 150 is used to filter the air output by the air pump 130. For example, its filtering accuracy can reach 0.3um to meet the requirements of patient inhalation.
- a one-way valve 160 can also be arranged in the second fresh gas branch 40. The one-way valve 160 is arranged after the second filter 150, and is used to output the air filtered by the second filter 150 in one direction.
- the second fresh gas branch 40 may also be provided with a normally closed pressure relief branch, such as the branch 140 in FIG. 3 , which may be provided, for example, between the air pump 130 and the second filter 150.
- the normally closed pressure relief branch includes a relief valve 140, which is provided at the rear end of the air pump 130.
- the relief valve 140 is used to guide the normally closed pressure relief branch when the air pressure of the second fresh gas branch 40 is higher than the working pressure, so that the air on the second fresh gas branch 40 can flow out from the normally closed pressure relief branch.
- the built-in air pump 130 inhales air from the air inlet 110 and filters the air through the first filter 120 to protect the air pump 130 and the rear-end devices.
- the rear end is connected to a pressure sensor P0 and a relief valve 140.
- the pressure sensor P0 is used to monitor the air pressure at the rear end of the air pump 130.
- the relief valve 140 can make the air pressure at the rear end of the air pump 130 not exceed the preset working pressure of the relief valve 140.
- the relief valve 140 can be electronic or mechanical. The mechanical relief valve can better resist the electronic control failure of the anesthesia machine.
- the relief valve 140 opens, and part of the air in the second fresh gas branch 40 is discharged into the atmosphere through the relief valve 140 to reduce the pressure.
- the preset working pressure can be a system preset value for pressure judgment.
- the preset working pressure is the valve plate sealing valve pressure of the mechanical relief valve.
- the second filter 150 is used to further filter the air at the rear end of the air pump 130.
- the one-way valve 160 prevents the gas from flowing back and prevents the gas in the second fresh gas branch 40 from flowing out of the air pump 130 when the air pump 130 is not started.
- the detection device 60 is used to detect a characteristic quantity that characterizes the air flow characteristics of the second fresh gas branch 40. That is, the characteristic quantity can reflect the flow characteristics of the air in the second fresh gas branch 40.
- the flow characteristics can be flow rate, flow velocity or pressure, etc., which are associated with the size of the air flow of the second fresh gas branch 40.
- the characteristic quantity can be the air flow itself, or it can be a factor that affects the air flow, etc., as long as it can reflect the air flow characteristics of the second fresh gas branch 40, and the present invention is not limited thereto.
- the first fresh gas branch 30 and the second fresh gas branch 40 are connected to the anesthetic delivery device 70, for example, Figures 1 and 2 show two ways of connection.
- the anesthetic delivery device 70 can be used as an external device on the anesthesia machine, or as a part of the anesthesia machine.
- the anesthetic delivery device 70 contains anesthetics, and is used to mix the gas provided by the first fresh gas 30 branch, the air provided by the second fresh gas branch 40, and the anesthetic to obtain a first mixed gas, and the first mixed gas is delivered to the breathing circuit 80.
- the gas provided by the first fresh gas 30 branch (such as oxygen and/or nitrous oxide) and the air provided by the second fresh gas branch 40 can be mixed in the anesthetic delivery device 70, or can be mixed first and then mixed with anesthetics in the anesthetic delivery device 70.
- the anesthesia machine also includes a third fresh gas branch 50.
- the third fresh gas branch 50 is used to mix the gas provided by the first fresh gas branch 30 with the air provided by the second fresh gas branch 40 to obtain a second mixed gas (such as an oxygen-air mixed gas, a nitrous oxide-air mixed gas, or a mixed gas of oxygen, nitrous oxide, and air, etc.).
- the anesthetic delivery device 70 is connected to the third fresh gas branch 50, and mixes the second mixed gas and the anesthetic to obtain the first mixed gas, and can also control the anesthetic concentration of the first mixed gas.
- the anesthetic delivery device 70 may include a vaporizer.
- the breathing circuit 80 is an air path connecting the anesthetic delivery device 70 and the patient, and is used to deliver the first mixed gas to the patient.
- the breathing circuit 80 can recycle the gas exhaled by the patient to save anesthetics and reduce environmental pollution.
- the breathing circuit 80 can include various connecting conduits and output ports.
- the output port can be various types of accessories.
- the accessories can be endotracheal tubes, endotracheal tubes with air bags at the ends, etc.
- a gas purification device can be provided in the breathing circuit 80, and the gas purification device is used to remove at least part of the carbon dioxide exhaled by the patient into the breathing circuit.
- a CO2 absorbent sodium bicarbonate
- the CO2 absorbent reacts with CO2 to achieve the purpose of removing CO2 , and the reaction generates water and heat at the same time, which is conducive to maintaining the temperature and humidity of the patient's inhaled gas.
- the ventilation control device 90 is used to control the breathing circuit 80 to deliver the first mixed gas to the patient through its output port, so that the anesthesia machine provides anesthetic breathing support for the patient, for example, controlling the breathing circuit 80 to periodically deliver the first mixed gas to the patient, so that the anesthesia machine provides periodic anesthetic breathing support for the patient.
- the ventilation control device 90 can automatically perform anesthetic ventilation control, or it can be performed manually (such as a balloon).
- the ventilation control device 90 may include a plurality of valves and a board for driving the plurality of valves. The board controls the plurality of valves to periodically deliver the first mixed gas to the patient, thereby providing periodic anesthetic breathing support for the patient.
- the processor 20 is used to adjust the output capacity of the air compression device 10 according to the characteristic quantity output by the detection device 60, such as adjusting the air flow rate provided (output) by the air compression device 10.
- the air flow rate output by the air compressor 10 can be adjusted by adjusting the air flow rate. On the one hand, it can assist in flow regulation. On the other hand, it can allow the air compressor 10 to not run at full load, thereby increasing the use time of the air compressor, indirectly saving costs, and reducing the noise caused by the use of the air compressor 10.
- the working process of the anesthesia machine may include the following steps:
- Step 1 After the anesthesia machine is started, the air compression device 10 is turned on, and each fresh gas branch is also turned on. Each fresh gas branch provides corresponding fresh gas, and various fresh gases are added with anesthetics and the concentration is adjusted through the evaporator to form a first mixed gas; the first mixed gas enters the breathing circuit 80, and the ventilation control device 90 performs ventilation control to deliver the first mixed gas to the patient, and the waste gas exhaled by the patient is purified by the gas purification device and then discharged or recycled; during the above process, the anesthesia machine will also monitor the machine status and patient parameters to ensure patient safety and issue abnormal alarms.
- Step 2 During the operation of the anesthesia machine, the detection device 60 detects a characteristic variable that characterizes the air flow characteristics of the second fresh gas branch 40 .
- Step 3 The processor 20 adjusts the air flow provided by the air compression device 10 according to the characteristic quantity detected by the detection device 60.
- a valve K may be provided on the second fresh gas branch 40 or the third fresh gas branch 50 to adjust the air flow rate.
- the anesthesia machine further includes a first valve disposed in the second fresh gas branch 40, such as the valve K in FIG. 2 and FIG. 3.
- the first valve is used to adjust the air flow in the second fresh gas branch 40.
- step 3 may include the following steps:
- Step 31 the processor 20 determines the current air flow of the second fresh gas branch 40.
- the processor 20 may obtain the current air flow directly from the detection device 60, or may calculate the current air flow indirectly based on the characterization quantity. These two methods are described below.
- the characterizing quantity is the current air flow of the second fresh gas branch 40.
- the detection device 60 includes a first flow sensor.
- the first flow sensor can be arranged in the second fresh gas branch 40.
- the first flow sensor is used to detect the current air flow of the second fresh gas branch 40, and the current air flow detected by the first flow sensor is used as the characterizing quantity.
- the first flow sensor can be arranged in the second fresh gas branch 40. If the first valve adopts a solenoid valve, because the processor 20 needs to control the solenoid valve to set the air flow, the solenoid valve will be associated with the first flow sensor.
- the first flow sensor and the solenoid valve are arranged in the anesthesia machine in the form of a fully electronic flow meter.
- the processor 20 can receive the current air flow output by the first flow sensor to control the output capacity of the air compression device 10 (such as controlling the rotation speed of the air pump 130).
- the characterization quantity does not include the current air flow of the second fresh gas branch.
- the processor 20 obtains the current air flow of the second fresh gas branch 40 according to the characterization quantity output by the detection device 60.
- the anesthesia machine also includes an oxygen concentration sensor for detecting the oxygen concentration of the second mixed gas.
- the detection device 60 includes a second flow sensor. The second The flow sensor is used to detect the flow of the gas provided by the first fresh gas branch 30 , or to detect the mixed gas flow of the second mixed gas provided by the third fresh gas branch 50 .
- the processor 20 can calculate the current air flow rate of the second fresh gas branch 40 based on the oxygen concentration of the second mixed gas and the flow rate of oxygen provided by the first fresh gas branch, or based on the oxygen concentration of the second mixed gas and the flow rate of the second mixed gas provided by the third fresh gas branch, so as to adjust the output capacity of the air compression device 10 (such as adjusting the rotation speed of the air pump 130).
- the first method is simple and convenient, and this embodiment is described by taking the first method as an example.
- the processor 20 obtains the current air flow, it can also store the current air flow at different times, and can also display the current air flow through the human-computer interaction device so that the doctor can view and monitor the air flow.
- Step 32 The processor 20 obtains the current flow setting value of the second fresh gas branch.
- the anesthesia machine further includes a human-computer interaction device.
- the human-computer interaction device is used for human-computer interaction, for example, for displaying visual information and receiving user input, and may include a display, a touch screen, a button, a keyboard, a mouse, etc.
- the processor 20 may receive the flow setting value of the second fresh gas branch input by the user through the human-computer interaction device.
- Step 33 the processor 20 adjusts the output capacity of the air compressor 10 according to the difference between the current air flow rate of the second fresh gas branch and the current flow rate setting value. Specifically, when the current air flow rate is lower than the current flow rate setting value, the processor 20 increases the output capacity of the air compressor 10 to increase the air flow rate, that is, increases the air flow rate provided by the air compressor. For example, the output capacity of the air compressor is the rotation speed of the air pump 130, specifically, the rotation speed of the air pump 130 is increased. When the current air flow rate is higher than the current flow rate setting value, the processor 20 decreases the output capacity of the air compressor 10 to reduce the air flow rate, that is, decreases the air flow rate provided by the air compressor, specifically, decreases the rotation speed of the air pump 130.
- the air pump 130 makes noise when working and has problems with its service life.
- This embodiment adjusts the rotation speed of the air pump 130 according to the actual air fresh gas flow rate. It is easy to understand that a low speed can meet the requirements of a small flow rate, and a large air flow rate requires a higher air pump speed. In this case, the air pump 130 does not need to work at the highest speed (full load) under any circumstances.
- the application of low-flow fresh gas is increasing, so in most cases, the air pump 130 only needs to work at a low speed. Obviously, this method can effectively increase the service life of the air pump 130 and reduce the working sound.
- the processor 20 can adjust the output capacity of the air compression device 10 only to make the difference between the current air flow rate and the current flow setting value approach 0 (i.e., adjust the air flow rate to the current flow setting value); or it can adjust both the first valve and the output capacity of the air compression device 10 to make the difference between the current air flow rate and the current flow setting value approach 0. This embodiment is described using the latter as an example.
- the first valve is a solenoid valve, that is, the processor 20 can control the opening of the first valve, and the doctor does not need to manually turn the valve. Therefore, in step 32, after the processor 20 receives the flow setting value input by the user through the human-computer interaction device, it controls the opening of the first valve so that the air flow of the second fresh gas branch 40 is adjusted to the flow setting value.
- the processor 20 can also adjust the opening of the first valve according to the difference between the current air flow and the current flow setting value.
- the processor 20 can first adjust the opening of the first valve, and then adjust the output capacity of the air compression device 10; specifically, when the current air flow is lower than the current flow setting value, the processor 20 increases the opening of the first valve as the main measure to increase the air flow according to the difference between the current air flow and the current flow setting value (the difference at this time is relatively large), and then re-acquires the current air flow.
- the processor 20 increases the speed of the air pump 130 as a secondary measure to increase the air flow according to the difference between the re-acquired current air flow and the current flow setting value (because the valve opening has been adjusted, the difference at this time is relatively small).
- the processor 20 adjusts the opening of the first valve as the primary measure to reduce the air flow according to the difference between the current air flow and the current flow setting value, and then reacquires the current air flow.
- the processor 20 reduces the speed of the air pump 130 as a secondary measure to reduce the air flow according to the difference between the reacquired current air flow and the current flow setting value; this not only can quickly adjust the current air flow to the current flow setting value, but also is very friendly to the life of the air pump.
- the processor can also adjust the opening of the first valve and the output capacity of the air compression device at the same time.
- the processor can also adjust the output capacity of the air compression device first, and then adjust the opening of the first valve; specifically, when the current air flow is lower than the current flow setting value, the processor 20 increases the speed of the air pump 130 as the main measure to increase the air flow according to the difference between the current air flow and the current flow setting value (the difference at this time is relatively large), and then re-acquires the current air flow.
- the processor 20 increases the opening of the first valve as a secondary measure to increase the air flow according to the difference between the re-acquired current air flow and the current flow setting value (because the speed has been adjusted, the difference at this time is relatively small).
- the processor 20 When the current air flow is higher than the current flow setting value, the processor 20 reduces the speed of the air pump 130 according to the difference between the current air flow and the current flow setting value to reduce the air flow, and then re-acquires the current air flow, and lowers the opening of the first valve to reduce the air flow according to the difference between the re-acquired current air flow and the current flow setting value.
- the anesthesia machine further includes: a second valve provided in the second fresh gas branch 40, such as the valve K shown in FIGS. 2 and 3, and the second valve is used to support the user to manually adjust the air flow of the second fresh gas branch 40.
- a second valve provided in the second fresh gas branch 40, such as the valve K shown in FIGS. 2 and 3, and the second valve is used to support the user to manually adjust the air flow of the second fresh gas branch 40.
- the air flow in this embodiment needs to be manually adjusted by the doctor.
- a mechanical flow meter or an electronic flow meter can also be provided in the second fresh gas branch 40.
- the mechanical flow meter has an instrument that displays the flow rate, or has a glass tube that displays the flow rate.
- the flow rate is reflected by the position of the float in the glass tube, and there are corresponding scale values on the glass tube to display the specific flow rate value.
- the doctor can adjust the second valve according to the real-time air flow detected by the mechanical flow meter and the patient's condition.
- the air flow rate can be monitored by a flow sensor, and the data can be transmitted to the processor 20.
- the processor 20 stores the data and displays the air flow rate through the display interface of the human-computer interaction device.
- the processor 20 Since the air flow rate is completely controlled manually by the doctor, the processor 20 cannot know the air flow rate (corresponding to the flow rate setting value in the previous embodiment) desired by the doctor. Therefore, in this embodiment, the characterization quantity adopts the characterization quantity of the opening of the second valve.
- the processor 20 adjusts the air provided by the air compression device according to the change of the characterization quantity caused by the user manually adjusting the second valve. Air flow, that is, the change trend of the opening characterization quantity is obtained according to the opening characterization quantity of the second valve; and then the air flow provided by the air compression device 10 is adjusted according to the change trend of the opening characterization quantity.
- the processor 20 increases the output capacity of the air compression device 10 to increase the air flow.
- the change of the opening characterization quantity indicates a decrease in the opening, that is, when the change trend of the opening characterization quantity is a decrease in the opening, it means that the doctor wants to reduce the air flow, so the processor 20 lowers the output capacity of the air compression device 10 to reduce the air flow. In this way, it can not only assist in the adjustment of the air flow, but also reduce the workload of the air compression device 10 when low-flow air supply becomes a trend, thereby extending the use time of the air compression device 10.
- the detection device detects the opening characteristic quantity of the second valve, and then the processor adjusts the output capacity of the air compression device accordingly.
- the detection device 60 includes a first pressure sensor.
- the first pressure sensor can be arranged between the air compression device and the second valve, can be arranged near the rear end of the air compression device, and can also be arranged near the second valve, that is, the first pressure sensor is used to detect the air pressure of the second fresh gas branch 40 at the front end of the second valve. That is, the opening characterizing quantity of the second valve is the air pressure detected by the first pressure sensor.
- This mode does not need to refer to the air flow, so the anesthesia machine can use a mechanical flow meter to monitor the air flow.
- the processor 20 obtains the changing trend of the air pressure according to the air pressure at different times; when the changing trend of the air pressure is an increase in pressure, it means that the doctor has closed the second valve, so the processor 20 lowers the output capacity of the air compression device 10; when the changing trend of the air pressure is a decrease in pressure, it means that the doctor has opened the second valve, so the processor 20 increases the output capacity of the air compression device 10.
- adjusting the output capacity of the air compressing device 10 can be to adjust the rotation speed of the air compressing device 10.
- different air pressures can be matched with different rotation speeds in advance, and the air pressure is inversely proportional to the rotation speed.
- the processor 20 increases and decreases the rotation speed of the air compressing device 10, and the rotation speed of the air compressing device 10 can be adjusted to the rotation speed corresponding to the current air pressure. Since the higher the air pressure, the lower the rotation speed, and the lower the air pressure, the higher the rotation speed, the above-mentioned adjustment can be achieved.
- the interval control method can also be adopted, for example, different pressure intervals can be matched with different rotation speeds in advance, and the average air pressure of the pressure interval is inversely proportional to the corresponding rotation speed, that is, the higher the pressure interval, the lower the rotation speed, and the lower the pressure interval, the higher the rotation speed.
- the processor 20 increases and decreases the rotation speed of the air compressing device 10, and can obtain the pressure interval to which it belongs according to the current air pressure, and then adjust the rotation speed of the air compressing device 10 to the rotation speed corresponding to the pressure interval to which it belongs, and the above-mentioned adjustment can also be achieved.
- the detection device 60 includes a second pressure sensor P2, a third flow sensor 610 and a third pressure sensor P3.
- the second pressure sensor P2, the third flow sensor 610 and the third pressure sensor P3 are sequentially arranged on the second fresh gas branch 40.
- the third flow sensor 610 is used to detect the air flow of the second fresh gas branch 40.
- the processor 20 also stores the air flow and displays it through the display interface of the human-computer interaction device, so that the doctor can monitor the air flow.
- the second valve can be set before the third flow sensor 610, or after the third flow sensor 610.
- the second pressure sensor P2 is used to detect the air pressure of the second fresh gas branch in front of the second valve, that is, to detect the air pressure between the air compression device 10 and the second valve, that is, to detect the air pressure in front of the second valve.
- the third pressure sensor P3 is used to detect the air pressure at the rear end of the second valve. That is, P2 and P3 are respectively located before and after the second valve, that is, the second valve is located between the second pressure sensor P2 and the third pressure sensor P3, so that after the opening of the second valve is adjusted, the pressure difference between the second pressure sensor P2 and the third pressure sensor P3 can be reflected.
- the air pressure detected by the second pressure sensor, the air flow detected by the third flow sensor, and the air pressure detected by the third pressure sensor can be used to calculate the opening characteristic of the second valve, which can be calculated by the opening calculation unit 620 of the detection device 60 or by the processor 20.
- the opening calculation unit 620 or the processor 20 is used to receive the air flow detected by the third flow sensor 610, and receive the air pressure detected by the second pressure sensor P2 and the third pressure sensor P3; the opening characterization quantity of the second valve is calculated according to the air pressure detected by the second pressure sensor P2, the air flow detected by the third flow sensor 610, and the air pressure detected by the third pressure sensor P3. Specifically, the opening calculation unit 620 or the processor 20 subtracts the air pressure detected by the third pressure sensor P3 from the air pressure detected by the second pressure sensor P2 to obtain the pressure difference, and divides the pressure difference by the air flow F detected by the second flow sensor 610 to obtain the opening characterization quantity of the second valve. In other words, the opening calculation unit 620 or the processor 20 can calculate the opening characterization quantity R according to the following formula:
- R is the opening characterization quantity
- P2 is the air pressure detected by the second pressure sensor
- P3 is the air pressure detected by the third pressure sensor
- F is the air flow detected by the third flow sensor 610.
- the present method uses the actual air flow and the resulting pressure change to calculate the opening of the second valve, and the result is accurate and reliable.
- the detection device 60 includes a third flow sensor.
- the third flow sensor can be arranged in the second fresh gas branch 40.
- the third flow sensor is used to detect the air flow of the second fresh gas branch 40.
- the opening characterizing quantity of the second valve is the air flow, or the air flow can be directly used as the characterizing quantity.
- the detection device 60 includes a displacement sensor or a gap sensor.
- the displacement sensor or the gap sensor is used to detect the opening of the second valve to obtain the opening characterization value.
- the displacement sensor detects the relative position change between the needle valve and the valve seat of the second valve to obtain the opening characterization quantity.
- the gap sensor can be, for example, a grating, which is used to detect the gap size between the needle valve and the valve seat of the second valve to obtain the opening characterization quantity.
- the relative position of the needle valve and the valve seat will change.
- the relative position of the two will be monitored by using a displacement sensor or a gap sensor.
- the processor 20 increases the output capacity of the air compressor 10; when the relative position becomes smaller, it means that the valve opening becomes smaller, and the processor 20 reduces the output capacity of the air compressor 10.
- the processor 20 can adjust the output capacity of the air compression device 10 by adjusting the speed of the air compression device 10, such as adjusting the speed of the air pump.
- various methods of adjusting the speed of the air pump can not only meet the needs of fresh gas, but also reduce the sound volume of the air pump operation, and at the same time increase the operating service life of the air pump.
- the pressure of the anesthesia machine supplying gas to the patient is stable, and what is adjusted or changed is the flow rate of the gas supply.
- the anesthesia machine can include a first pressure sensor (such as P0 in FIG. 3 ).
- the first pressure sensor is used to detect the air pressure of the second fresh gas branch 40, that is, to detect the air pressure at the rear end of the air compression device 10.
- the air pressure in the second fresh gas branch is usually constant, for example, needs to be maintained at a preset target pressure, or the air pressure is usually stable in a range, for example, needs to be maintained in a preset target pressure range.
- the target pressure and target pressure range can be set according to user needs or built into the system, which can ensure that when the air pressure is the target pressure or within the target pressure range, even if the opening of the first valve or the second valve is maximized, the corresponding air flow rate can exceed the preset minimum flow rate, and it can also ensure that no condensed water will appear in the second fresh gas branch.
- the processor 20 can increase the output capacity of the air compression device 10 to increase the air pressure so that the air pressure is maintained at the target pressure; when the air pressure detected by the first pressure sensor is higher than the preset target pressure, the processor 20 can reduce the output capacity of the air compression device 10 to reduce the air pressure so that the air pressure is maintained at the target pressure.
- the processor 20 increases the output capacity of the air compression device 10 to increase the air pressure so that the air pressure is within the target pressure interval; when the air pressure detected by the first pressure sensor is higher than the upper limit of the target pressure interval, the processor 20 reduces the output capacity of the air compression device 10 to reduce the air pressure so that the air pressure is within the target pressure interval.
- the opening characterization quantity is the air pressure detected by the first pressure sensor.
- the change characterizes an increase in the opening the air flow provided by the air compressor is increased; when the change in the opening characterizing quantity (air pressure) characterizes a decrease in the opening, the air flow provided by the air compressor is decreased.
- the present invention can also directly adjust the air compressor based on the change in air pressure. When the air pressure becomes smaller, the air flow provided by the air compressor is increased; when the air pressure becomes larger, the air flow provided by the air compressor is decreased.
- the air pressure at the current moment becomes smaller relative to the air pressure at the previous moment or the previous time interval, it is considered that the air pressure has become smaller, and the air flow provided by the air compressor needs to be increased.
- the air pressure at the current moment becomes larger relative to the air pressure at the previous moment or the previous time interval, it is considered that the air pressure has become larger, and the air flow provided by the air compressor needs to be decreased.
- the processor 20 adjusts the rotation speed of the air compressor 10, it can obtain the air pressure of the second fresh gas branch 40.
- the air pressure is higher than the preset target pressure (such as the control target of the air pump)
- the rotation speed of the air compressor 10 needs to be reduced to reduce the output, and the pressure at the rear end of the air compressor 10 needs to be passively released through flow output.
- the inventor found that due to the inevitable leakage of a certain size in the various components of the air compressor 10 and the anesthesia machine circuit, this causes the pressure at the rear end of the air compressor 10 to slowly decrease when the fresh gas regulating valve (the first valve and the second valve mentioned above) is closed or the opening is small.
- the pressure release process at the rear end of the air compressor 10 is relatively long, and the air compressor 10 may reduce the rotation speed to zero and shut down.
- the air compressor 10 may reduce the rotation speed to zero and shut down.
- the pressure is released below the target pressure, it is necessary to increase the rotation speed of the air compressor 10 to increase the rear end pressure.
- the air compressor 10 is shut down, when the rear end pressure is lower than the target pressure, there is also a certain pressure at the rear end of the air compressor 10. If the air compressor 10 increases the speed from 0, since the output torque corresponding to the small speed is also small, the air compressor 10 needs a larger speed to restart.
- the air compressor 10 will start and stop repeatedly. This phenomenon of repeated start and stop is easy to occur under such working conditions.
- an adjustment range can be set for the speed of the air compressor 10, so that the processor 20 can only adjust the speed of the air compressor 10 within this adjustment range, that is, the processor 20 adjusts the speed of the air compressor 10 within a preset speed range.
- a minimum speed (the minimum value of the speed range) can be set to ensure that the air compressor 10 maintains the rear end pressure above the target pressure when the fresh gas regulating valve is closed or the opening is small. This method can increase the service life of the air compressor 10 and reduce heat generation, and at the same time solve the problem that the pump may not be started due to insufficient output torque when starting under a certain back pressure.
- the minimum value of the speed range is preset, and the principle is that the air compressor 10 will not shut down due to too slow speed when working at the minimum value of the speed range.
- the inventor also found that since the output capacity of the air pump is not as good as that of the pipeline gas, when switching from pipeline gas to air pump supply, it may cause the previous flow setting value to fail to be reached, affecting the oxygen concentration and flow rate of the output fresh gas.
- the anesthesia machine that uses a solenoid valve to adjust the flow rate uses the solenoid valve to adjust to achieve the flow setting target.
- the air fresh gas flow setting value is within the maximum output capacity of the air pump, switching from pipeline gas to the air pump does not affect the flow output size.
- the flow setting value exceeds the maximum output capacity of the air pump, switching from pipeline gas to the air pump affects the oxygen concentration and flow rate of the output fresh gas.
- the processor 20 can switch the type of air source currently providing air from the air interface to the air compression device.
- the corresponding prompt information is displayed through the human-computer interaction device, thereby prompting the doctor that the air supply is changed to be provided by an air compression device.
- the processor 20 can also display the corresponding prompt information through the human-computer interaction device when the type of air source currently providing air is switched from an air compression device to an air interface. In this way, the doctor will pay more attention to possible changes in air flow with the prompt information, and make corresponding adjustments to avoid large fluctuations in air flow.
- the air source type is divided into two types: air interface and air compression device.
- the processor 20 can determine whether the gas source type has switched in a variety of ways. For example, when the processor 20 detects that the air compression device 10 is turned on and the anesthesia machine is in working condition, it determines that the gas source type has switched from the air interface to the air compression device. For another example, a pressure sensor or a flow sensor is provided at the air interface, and the processor 20 determines whether the gas source type has switched by the change in the value detected by the pressure sensor or the flow sensor. For example, when the value changes from a value exceeding a preset value to 0 (indicating that the air interface is disconnected from the hospital pipeline), and the anesthesia machine is in working condition (for example, the air compression device 10 is turned on), it is determined that the gas source type has switched from the air interface to the air compression device.
- the preset value is a value greater than 0, which is used to exclude pressure or flow changes caused by wind, and it can be slightly greater than 0.
- the processor 20 may display the corresponding prompt information through the human-computer interaction device in a variety of ways, several of which are described below.
- the processor 20 displays the type of the current air source through the human-computer interaction device. For example, if the air compressor 10 is turned on, it means that the current air source is an air compressor. If the value detected by the pressure sensor or flow sensor at the air interface is greater than a preset value, it means that the current air source is an air interface. This prompting method is simple and direct.
- the first valve is usually a solenoid valve. After switching to the air compressor 10 for air supply, since the doctor sets the flow setting value, even if the flow changes, the processor 20 can automatically adjust the first valve according to the flow setting value to maintain the air flow at the flow setting value.
- the second valve is manually controlled. Therefore, after the air source type is switched, the processor 20 can further prompt the user to adjust the second valve through the human-computer interaction device. The doctor can adjust the second valve in time according to the possible flow change to avoid adverse effects caused by the switching of the air source type.
- the processor 20 after the processor 20 displays the corresponding prompt information through the human-computer interaction device, it can also determine whether the opening characterization quantity of the second valve has changed. If the opening characterization quantity has changed, it means that the doctor has seen the prompt information and then adjusted the second valve. Therefore, the purpose of the prompt has been achieved.
- the processor 20 cancels the display of the information for prompting the user to adjust the second valve. In this way, the doctor does not need to manually close the prompt information, and the whole process is automated and intelligent, which is very convenient.
- the detection device uses a flow sensor to detect the current air flow of the second fresh gas branch 40, that is, the processor 20 detects the air flow through the flow sensor, and displays the current air flow (real-time air flow) detected by the flow sensor through the human-computer interaction device. Then the processor 20 displays the corresponding prompt information through the human-computer interaction device.
- the air flow detected by the flow sensor before and after the second valve is adjusted can be displayed in a differentiated manner on the interface of the human-computer interaction device displaying the air flow detected by the flow sensor, such as changing the display color of the current air flow, highlighting the current air flow, etc. In short, the current air flow can be displayed more prominently.
- the doctor can use the display to
- the real-time air flow on the display interface monitors the air flow provided by the second fresh gas branch.
- you see the air flow display mode change you know that the gas source type has been switched and the second valve may need to be adjusted. This prompt method does not take up additional space on the display interface.
- the processor 20 will record the flow setting value. After the current air source type for providing air is switched from the air interface to the air compressor, the difference between the maximum output flow of the air compressor 10 and the target flow setting value is judged according to the target flow setting value when the air source type is the air interface (usually the current flow setting value). When the maximum output flow is less than the target flow setting value, the user is prompted to switch back from the air compressor to the air interface through the human-computer interaction device.
- the maximum output flow of the air compressor 10 is the flow that the air compressor 10 can provide when it works at the maximum output capacity (such as the maximum speed), which is pre-set. In other words, when the air pump cannot provide the flow of the target flow setting value even when working at the maximum speed, the processor 20 reminds the user to switch back to the pipeline air supply to ensure high-flow air supply.
- the above-mentioned embodiments all use valves to control the air flow rate.
- the following provides an embodiment for directly controlling the air flow rate of the second fresh gas branch through the air compression device 10.
- the anesthesia machine provided in this embodiment includes the first fresh gas branch 30 as described above, the second fresh gas branch 40, the third fresh gas branch 50 as described above, the detection device 60 as described above, the anesthetic delivery device 70 as described above, the breathing circuit 80 as described above, the ventilation control device 90 as described above, the human-computer interaction device as described above, and the processor 20.
- no valve for adjusting the air flow is provided on the second fresh gas branch 40 , and the rest is the same as the second fresh gas branch 40 of the above embodiment, which will not be described in detail here.
- the human-computer interaction device is also used to receive a target flow setting value input by a user.
- the processor 20 is also used to adjust the output capacity of the air compressor 10 (such as adjusting the air flow rate provided by the air compressor 10) according to the target flow rate setting value. For example, the flow rates corresponding to the different output capacities of the air compressor 10 are calculated in advance to obtain the corresponding relationship between the flow rate and the output capacity. Then, the processor 20 adjusts the output capacity of the air compressor 10 to the output capacity corresponding to the target flow rate setting value according to the target flow rate setting value, thereby completing the setting of the air flow rate.
- the processor 20 can specifically adjust the output capacity of the air compressor 10 by controlling the input voltage of the air compressor 10.
- the corresponding relationship between different input voltages and the output capacity of the air compressor (such as the rotation speed) is obtained in advance, thereby obtaining the corresponding relationship between the flow rate and the input voltage.
- the processor 20 applies the input voltage corresponding to the target flow rate setting value to the air compressor 10 according to the target flow rate setting value, thereby controlling the output capacity of the controller, such as controlling its rotation speed.
- the detection device 60 follows the adjustment of the output capacity of the air compression device 10 and outputs the changing air flow value. For example, the detection device 60 detects the air flow of the second fresh gas branch 40 in real time and displays the air flow through the human-computer interaction device, so that the doctor can monitor the air flow in real time.
- the anesthesia machine usually detects the oxygen and/or nitrous oxide on the first fresh gas branch and displays it on the display interface of the human-machine interaction device.
- the air flow rate can be displayed together with the flow rate of oxygen and/or nitrous oxide.
- the air flow can also be displayed independently of the flow of oxygen and/or nitrous oxide, allowing doctors to monitor the air flow more attentively.
- the ventilation control device 90 controls the breathing circuit 80 to deliver the first mixed gas to the patient, which is specifically achieved by driving gas.
- driving gas also comes from pipeline gas or gas cylinders.
- the driving gas can come from the aforementioned air compression device 10 or from other air compression devices. The following examples are given to illustrate respectively.
- the air provided by the air compressor 10 can also be used as a driving gas for the anesthesia machine.
- the ventilation control device 90 includes a driving gas branch 910. One end of the driving gas branch 910 is connected to the air compressor 10, so that air can be obtained from the air compressor 10, and the other end of the driving gas branch 910 is connected to the breathing circuit 80.
- the driving gas branch 910 is used to use the air provided by the air compressor 10 as the driving gas to periodically drive the breathing circuit 80 to deliver the first mixed gas to the patient.
- the breathing circuit 80 may include an expiratory branch 810, an inspiratory branch 820, and a gas purification device 830.
- One end of the inspiratory branch 820 is connected to the output end of the anesthetic delivery device 70, so as to receive the first mixed gas output by the anesthetic delivery device 70, and the other end of the inspiratory branch 820 is used to connect to the patient and is also connected to one end of the expiratory branch 810.
- the other end of the expiratory branch 810 is connected to the driving gas branch 910 and one end of the gas purification device 830, and the other end of the gas purification device 830 is connected to one end of the inspiratory branch 820.
- the gas exhaled by the patient passes through the exhalation branch 810 and is stored in the driving gas branch 910; in the inhalation phase, the driving gas branch 910 controls the driving gas to drive the exhaled gas stored in the driving gas branch 910 into the gas purification device 830.
- the valve provided in the driving gas branch 910 is opened, so that the air output by the air compression device 10 as the driving gas can drive the exhaled gas stored in the driving gas branch 910 to enter the gas purification device 830.
- the gas purification device 830 removes at least part of the carbon dioxide in the exhaled gas, so that after the exhaled gas merges with the first mixed gas, it enters the inhalation branch 820 driven by the driving gas, so that the purified exhaled gas and the first mixed gas are delivered to the patient.
- the driving gas branch 910 may include a bellows, which includes a shell and a folding bag located in the shell. There is a cavity between the shell and the folding bag.
- the folding bag is used to store the gas exhaled by the patient.
- the gas exhaled by the patient enters the folding bag for storage.
- the folding bag will expand, reducing the volume of the cavity.
- the driving gas enters the cavity, and the pressure in the cavity increases, thereby squeezing the exhaled gas stored in the folding bag into the breathing circuit 80.
- the driving gas branch 910 may include a volume reflector.
- the volume reflector may be a thin and long pipe, which may be bent into various shapes, such as a disc, to save space.
- the thin and long pipe is used to prevent the driving gas from entering the breathing circuit 80 as much as possible.
- the volume reflector is used to store the gas exhaled by the patient.
- the gas exhaled by the patient enters the volume reflector for storage during the exhalation phase.
- the driving gas enters the volume reflector, thereby squeezing the exhaled gas stored in the volume reflector into the breathing circuit 80.
- the ventilation control device 90 may further include a gas exhaust branch 920, which is used to exhaust excess gas during the exhalation phase.
- the air output by the air compression device 10 can be used as fresh gas and driving gas after pressure regulation.
- the air compression device 10 is connected to one end of the second fresh gas branch and the driving gas branch 910 through a pressure regulating valve.
- the second fresh gas branch and the driving gas branch 910 can both be provided with a pressure regulating valve. Pressure valve.
- another air compression device 10′ is used to provide the driving gas.
- the ventilation control device 90 includes a driving gas branch 910.
- the anesthesia machine also includes another air compression device 10′.
- the other air compression device 10′ is used to provide air. Its structure and function are shown in the air compression device in the aforementioned embodiment, which will not be described in detail here.
- One end of the driving gas branch 910 is connected to the other air compression device 10′, and the other end of the driving gas branch 910 is connected to the breathing circuit 80.
- the driving gas branch 910 is used to use the air provided by the other air compression device 10′ as the driving gas to periodically drive the breathing circuit 80 to deliver the first mixed gas to the patient.
- the specific structure and connection relationship of the ventilation control device 90 and the breathing circuit 80 are basically the same as those of the embodiment shown in FIG. 7 , except that the air compression device connected to the driving gas branch 910 is different, so they will not be described in detail here.
- the anesthesia machine provided by the present invention may include, as shown in FIG9 , the first fresh gas branch 30 as described above, the second fresh gas branch 40 as described above, and the breathing circuit 80 as described above.
- the first fresh gas branch 30 is used to provide oxygen and/or nitrous oxide.
- the second fresh gas branch 40 is connected to an air compressor for providing air.
- the anesthesia machine may further include a driving gas branch 910.
- One end of the driving gas branch 910 is connected to the air compressor 10, and the other end is connected to the breathing circuit 80.
- the driving gas branch 910 is used to use the air provided by the air compressor 10 as the driving gas to periodically drive the breathing circuit 80 to deliver the first mixed gas to the patient.
- the specific process is the same as the embodiment shown in FIG. 7, and will not be described in detail here.
- the anesthesia machine may also include the processor 20 and the human-computer interaction device as described above, as shown in the above embodiments.
- the anesthesia machine may also include the third fresh gas branch 50 as described above, and its specific functions and connection relationship are shown in the above embodiments, which will not be described in detail here.
- the anesthesia machine provided by the present invention may include, as shown in FIG10, the first fresh gas branch 30 as described above, the second fresh gas branch 40 as described above, and the breathing circuit 80 as described above.
- the first fresh gas branch 30 is used to provide oxygen and/or nitrous oxide.
- the second fresh gas branch 40 is connected to a first air compressor for providing air.
- the function of the first air compressor is the same as that of the air compressor 10 in the aforementioned embodiment, and will not be described in detail herein.
- the anesthesia machine may further include a driving gas branch 910 and a second air compression device.
- the second air compression device is also used to provide air.
- the function of the second air compression device 10' is the same as the other air compression device 10' in the aforementioned embodiment, which will not be described in detail here.
- one end of the driving gas branch 910 is connected to the second air compression device, and the other end is connected to the breathing circuit 80.
- the driving gas branch 910 is used to use the air provided by the second air compression device as the driving gas to periodically drive the breathing circuit 80 to deliver the first mixed gas to the patient.
- the specific process is the same as the embodiment shown in Figure 8, which will not be described in detail here.
- any tangible, non-transitory computer-readable storage medium may be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu-Ray disks, etc.), flash memory, and/or the like.
- These computer program instructions may be loaded onto a general-purpose computer, a special-purpose computer, or other programmable data processing device to form a machine, such that the instructions executed on the computer or other programmable data processing device may generate a device that implements a specified function.
- These computer program instructions may also be stored in a computer-readable memory, which may instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable memory may form an article of manufacture, including an implementation device that implements a specified function.
- the computer program instructions may also be loaded onto a computer or other programmable data processing device, thereby executing a series of operating steps on the computer or other programmable device to produce a computer-implemented process, such that the instructions executed on the computer or other programmable device may provide steps for implementing a specified function.
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Abstract
Description
Claims (32)
- 一种麻醉机,其特征在于,包括:第一新鲜气体支路,用于提供氧气和/或笑气;第二新鲜气体支路,连通有空气压缩装置,用于提供空气;所述空气压缩装置提供的空气流量可调;所述第一新鲜气体支路和所述第二新鲜气体支路均与麻药输送装置连通,所述麻药输送装置用于将麻药、所述第一新鲜气体支路提供的氧气和/或笑气以及所述第二新鲜气体支路提供的空气混合得到第一混合气体;呼吸回路,用于接收所述麻药输送装置输出的所述第一混合气体,并将所述第一混合气体输送给病人;检测装置,用于检测表征所述第二新鲜气体支路的空气流动特性的表征量;以及处理器,用于根据所述检测装置输出的表征量,调节所述空气压缩装置提供的空气流量。
- 如权利要求1所述的麻醉机,其特征在于,当所述表征量为所述第二新鲜气体支路的当前空气流量时,所述处理器根据所述检测装置输出的表征量,调节所述空气压缩装置提供的空气流量,包括:获取所述第二新鲜气体支路的当前流量设定值;以及根据所述当前空气流量与所述当前流量设定值的差异来调节所述空气压缩装置提供的空气流量;或者,当所述表征量未包括所述第二新鲜气体支路的当前空气流量时,所述处理器根据所述检测装置输出的表征量,调节所述空气压缩装置提供的空气流量,包括:根据所述检测装置输出的表征量,得到所述第二新鲜气体支路的当前空气流量;获取所述第二新鲜气体支路的当前流量设定值;以及根据所述当前空气流量与所述当前流量设定值的差异来调节所述空气压缩装置提供的空气流量。
- 如权利要求2所述的麻醉机,其特征在于,所述调节空气压缩装置提供的空气流量包括调节所述空气压缩装置的转速;所述检测装置包括第一流量传感器,所述第一流量传感器用于检测所述第二新鲜气体支路的当前空气流量;所述第一流量传感器检测的所述当前空气流量作为所述表征量;所述处理器获取所述第一流量传感器检测的所述当前空气流量,以对所述空气压缩装置的转速进行调节。
- 如权利要求2所述的麻醉机,其特征在于,还包括第三新鲜气体支路和氧浓度传感器;所述第一新鲜气体支路用于提供氧气;所述第三新鲜气体支路用于将所述第一新鲜气体支路提供的氧气和所述第二新鲜气体支路提供的空气混合,得到第二混合气体;所述氧浓度传感器用于检测所述第二混合气体的氧浓度;所述检测装置包括第二流量传感器,所述第二流量传感器用于检测所述第一新鲜气体支路提供的氧气的流量或者所述第三新鲜气 体支路提供的第二混合气体的流量;调节所述空气压缩装置提供的空气流量包括调节所述空气压缩装置的转速;所述处理器用于根据所述第二混合气体的氧浓度与所述氧气的流量或根据所述第一混合气体的氧浓度与所述第一混合气体的流量,得到所述第二新鲜气体支路的当前空气流量,以对所述空气压缩装置的转速进行调节。
- 如权利要求2所述的麻醉机,其特征在于,所述处理器根据所述当前空气流量与所述当前流量设定值的差异来调节所述空气压缩装置提供的空气流量,包括:在所述当前空气流量低于所述当前流量设定值时,调高所述空气压缩装置提供的空气流量;和/或,在所述当前空气流量高于所述当前流量设定值时,调低所述空气压缩装置提供的空气流量。
- 如权利要求2所述的麻醉机,其特征在于,还包括人机交互装置;所述处理器获取当前的流量设定值,包括:通过所述人机交互装置接收用户输入的流量设定值。
- 如权利要求2所述的麻醉机,其特征在于,还包括设置在所述第二新鲜气体支路的第一阀门,所述第一阀门用于调节所述第二新鲜气体支路的空气流量;所述处理器还用于:根据所述当前空气流量与所述当前的流量设定值的差异来先调节所述第一阀门的开度,再调节所述空气压缩装置提供的空气流量;或者,根据所述当前空气流量与所述当前的流量设定值的差异来同时调节所述第一阀门的开度和所述空气压缩装置提供的空气流量;或者,根据所述当前空气流量与所述当前的流量设定值的差异来先调节所述空气压缩装置提供的空气流量,再调节所述第一阀门的开度。
- 如权利要求1所述的麻醉机,其特征在于,所述第一阀门为电磁阀门。
- 如权利要求1所述的麻醉机,其特征在于,还包括:设置在所述第二新鲜气体支路的第二阀门,用于支持用户对所述第二新鲜气体支路的空气流量进行手动调节;所述处理器根据所述检测装置输出的表征量,调节所述空气压缩装置提供的空气流量,包括:根据用户手动调节所述第二阀门所导致的所述表征量的变化来调节所述空气压缩装置提供的空气流量。
- 如权利要求9所述的麻醉机,其特征在于,所述检测装置包括第三流量传感器;所述第三流量传感器用于检测所述第二新鲜气体支路的当前空气流量;所述表征量为所述第二新鲜气体支路的当前空气流量;优选地,所述处理器根据用户手动调节所述第二阀门所导致的所述表征量的变化来调节所述空气压缩装置提供的空气流量,包括:在所述第三流量传感检测的空气流量增大时,调高所述空气压缩装置提供的空气流量;在所述第三流量传感检测的空气流量减小时,调低所述空气压缩装置提供的空气流量。
- 如权利要求9所述的麻醉机,其特征在于,所述表征量包括所述第二阀门的开度表 征量;所述处理器根据用户手动调节所述第二阀门所导致的所述表征量的变化来调节所述空气压缩装置提供的空气流量,包括:在所述开度表征量的变化表征开度增大时,调高所述空气压缩装置提供的空气流量;在所述开度表征量的变化表征开度减小时,调低所述空气压缩装置提供的空气流量。
- 如权利要求11所述的麻醉机,其特征在于,所述检测装置包括第一压力传感器,所述第一压力传感器用于检测所述第二阀门前端的第二新鲜气体支路的空气压力;所述第二阀门的开度表征量为所述空气压力;优选地,所述处理器在所述开度表征量的变化表征开度增大时,调高所述空气压缩装置提供的空气流量;在所述开度表征量的变化表征开度减小时,调低所述空气压缩装置提供的空气流量,包括:在所述空气压力低于目标压力时,调高所述空气压缩装置提供的空气流量;在所述空气压力高于目标压力时,调低所述空气压缩装置提供的空气流量;或者,在所述空气压力变小时,调高所述空气压缩装置提供的空气流量;在所述空气压力变大时,调低所述空气压缩装置提供的空气流量。
- 如权利要求11所述的麻醉机,其特征在于,所述检测装置包括第二压力传感器、第三流量传感器和第三压力传感器;所述第三流量传感器用于检测所述第二新鲜气体支路的空气流量;所述第二压力传感器用于检测所述第二阀门前端的第二新鲜气体支路的空气压力;所述第三压力传感器用于检测所述第二阀门后端的第二新鲜气体支路的空气压力;所述第二压力传感器检测的空气压力、所述第三流量传感器检测的空气流量以及所述第三压力传感器检测的空气压力可用于计算得到所述第二阀门的开度表征量。
- 如权利要求11所述的麻醉机,其特征在于,所述检测装置包括位移传感器或者间隙传感器,所述位移传感器或者间隙传感器用于检测所述第二阀门的开度,得到所述开度表征量。
- 如权利要求1所述的麻醉机,其特征在于,还包括空气接口和人机交互装置;所述空气接口用于接收外部提供的空气,所述空气接口和所述空气压缩装置择一与所述第二新鲜气体支路连通;所述处理器还用于:在当前提供空气的气源类型从空气接口切换到空气压缩装置和/或从空气压缩装置切换到空气接口时,通过所述人机交互装置显示对应的提示信息;其中,所述气源类型分为空气接口和空气压缩装置两种。
- 如权利要求15所述的麻醉机,其特征在于,所述处理器通过所述人机交互装置显示对应的提示信息,包括:通过所述人机交互装置显示当前提供空气的气源类型;和/或,在当前提供空气的气源类型从空气接口切换到空气压缩装置后,根据气源类型为空气接口时的目标流量设定值,在判断所述空气压缩装置的最大输出流量小于所述目标流量设定值时,通过所述人机交互装置提示用户从空气压缩装置切换回空气接口。
- 如权利要求15所述的麻醉机,其特征在于,还包括第二阀门,用于支持用户对所 述第二新鲜气体支路的空气流量进行手动调节;所述处理器通过所述人机交互装置显示对应的提示信息,包括:通过所述人机交互装置提示用户调节所述第二阀门。
- 如权利要求17所述的麻醉机,其特征在于,所述流量表征量包括所述第二阀门的开度表征量;所述处理器还用于:判断所述第二阀门的开度表征量是否改变,并在所述第二阀门的开度表征量变化时自动取消显示提示用户调节所述第二阀门的信息。
- 如权利要求18所述的麻醉机,其特征在于,所述检测装置包括第一流量传感器;所述第一流量传感器用于检测所述第二新鲜气体支路的空气流量;所述处理器通过所述人机交互装置显示对应的提示信息,包括:差异化显示所述第二阀门调节前后所述第一流量传感器检测的空气流量。
- 一种麻醉机,其特征在于,包括:第一新鲜气体支路,用于提供氧气和/或笑气;第二新鲜气体支路,连通有空气压缩装置,用于提供空气;所述空气压缩装置提供的空气流量可调;所述第一新鲜气体支路和所述第二新鲜气体支路均与麻药输送装置连通,所述麻药输送装置用于将麻药、所述第一新鲜气体支路提供的氧气和/或笑气以及所述第二新鲜气体支路提供的空气混合得到第一混合气体;呼吸回路,用于接收所述麻药输送装置提供的所述第一混合气体;通气控制装置,用于控制所述呼吸回路将所述第一混合气体输送给病人,从而为病人提供麻醉呼吸支持;人机交互装置,用于接收用户输入的目标流量设定值;处理器,用于根据所述目标流量设定值,调节所述空气压缩装置提供的空气流量。
- 如权利要求20所述的麻醉机,其特征在于,所述第二新鲜气体支路上未设置用于调节空气流量的阀门;所述麻醉机还包括检测装置,所述检测装置用于检测所述第二新鲜气体支路的空气流量;所述检测装置跟随所述空气压缩装置的输出能力的调节,输出变化的空气流量值。
- 如权利要求1至21中任一项所述的麻醉机,其特征在于,所述处理器通过控制所述空气压缩装置的输入电压来调节所述空气压缩装置提供的空气流量。
- 如权利要求1至21中任一项所述的麻醉机,其特征在于,所述空气压缩装置内置在所述麻醉机的壳体中。
- 如权利要求1至21中任一项所述的麻醉机,其特征在于,所述空气压缩装置包括转速可调的空气泵,所述空气泵用于将空气入口进入的空气压缩后输出;所述麻醉机还包括空气入口,所述空气入口和所述空气泵之间设置有第一过滤器;所述第一过滤器用于对自所述空气入口进入的空气进行过滤;优选地,所述第二新鲜气体支 路设置有第二过滤器,所述第二过滤器用于对所述空气泵输出的空气进行过滤。
- 如权利要求24所述的麻醉机,其特征在于,所述第二新鲜气体支路上设置有常闭卸压支路,所述常闭卸压支路包括常闭溢流阀;所述常闭溢流阀设置在所述空气泵的后端,用于在所述第二新鲜气体支路的空气压力高于工作压力时导通所述常闭卸压支路,使得所述第二新鲜气体支路上的空气能够从所述常闭卸压支路流出。
- 如权利要求1至21中任一项所述的麻醉机,其特征在于,调节所述空气压缩装置提供的空气流量包括调节所述空气压缩装置的转速;所述处理器在预设的转速区间内调节所述空气压缩装置的转速;所述空气压缩装置按所述转速区间的最小值工作时不会因转速过慢而停机。
- 一种麻醉机,其特征在于,包括:第一新鲜气体支路,用于提供氧气和/或笑气;第二新鲜气体支路,连通有空气压缩装置,用于提供空气;所述空气压缩装置提供的空气流量可调;第二阀门,用于支持用户对所述第二新鲜气体支路的空气流量进行手动调节;所述第一新鲜气体支路和所述第二新鲜气体支路均与麻药输送装置连通,所述麻药输送装置用于将麻药、所述第一新鲜气体支路提供的氧气和/或笑气以及所述第二新鲜气体支路提供的空气混合得到第一混合气体;呼吸回路,用于接收所述麻药输送装置输出的所述第一混合气体,并将所述第一混合气体输送给病人;检测装置,用于检测所述第二阀门的开度表征量;以及处理器,用于根据所述开度表征量的变化来调节所述空气压缩装置的输出能力的大小。
- 如权利要求1、20或27所述的麻醉机,其特征在于,所述麻醉机还包括驱动气体支路,所述驱动气体支路的一端与所述空气压缩装置连通,另一端与所述呼吸回路连通;所述驱动气体支路用于利用所述空气压缩装置提供的空气作为驱动气体,周期性地驱动所述呼吸回路将第一混合气体输送给病人;或者,所述麻醉机还包括驱动气体支路和另一空气压缩装置,所述驱动气体支路的一端与所述另一空气压缩装置连通,另一端与所述呼吸回路连通;所述驱动气体支路用于利用所述另一空气压缩装置提供的空气作为驱动气体,周期性地驱动所述呼吸回路将第一混合气体输送给病人。
- 一种麻醉机,其特征在于,包括:第一新鲜气体支路,用于提供氧气和/或笑气;第二新鲜气体支路,连通有空气压缩装置,用于提供空气;所述第一新鲜气体支路和所述第二新鲜气体支路均与麻药输送装置连通,所述麻药输送装置用于将麻药、所述第一新鲜气体支路提供的氧气和/或笑气以及所述第二新鲜气体支路提供的空气混合得到第一混合气体;呼吸回路,用于接收所述麻药输送装置输出的所述第一混合气体;驱动气体支路;所述驱动气体支路的一端与所述空气压缩装置连通,另一端与所述呼吸回路连通;所述驱动气体支路用于利用所述空气压缩装置提供的空气作为驱动气体,周期性地驱动所述呼吸回路将第一混合气体输送给病人;或者,所述麻醉机还包括另一空气压缩装置,所述驱动气体支路的一端与所述另一空气压缩装置连通,另一端与所述呼吸回路连通;所述驱动气体支路用于利用所述另一空气压缩装置提供的空气作为驱动气体,周期性地驱动所述呼吸回路将第一混合气体输送给病人。
- 如权利要求29所述的麻醉机,其特征在于,所述空气压缩装置包括涡轮、空气泵或空气压缩机。
- 如权利要求30所述的麻醉机,其特征在于,所述空气压缩装置包括空气泵,所述另一空气压缩装置包括涡轮。
- 如权利要求30所述的麻醉机,其特征在于,所述空气压缩装置通过一个调压阀分别连通所述第二新鲜气体支路和所述驱动气体支路的一端;或者,所述第二新鲜气体支路和所述驱动气体支路中均设置有调压阀。
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| EP24822687.0A EP4596011A4 (en) | 2023-06-16 | 2024-06-11 | Anesthesia machine |
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| EP4596011A4 (en) | 2026-02-18 |
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| EP4596011A1 (en) | 2025-08-06 |
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