WO2021232268A1 - Dispositif de ventilation médicale, procédé de commande et support d'enregistrement - Google Patents

Dispositif de ventilation médicale, procédé de commande et support d'enregistrement Download PDF

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Publication number
WO2021232268A1
WO2021232268A1 PCT/CN2020/091190 CN2020091190W WO2021232268A1 WO 2021232268 A1 WO2021232268 A1 WO 2021232268A1 CN 2020091190 W CN2020091190 W CN 2020091190W WO 2021232268 A1 WO2021232268 A1 WO 2021232268A1
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WIPO (PCT)
Prior art keywords
gas extraction
electric gas
driving amount
extraction device
exhaust device
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PCT/CN2020/091190
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English (en)
Chinese (zh)
Inventor
刘华旺
伍乐平
周小勇
蔡琨
肖杨
Original Assignee
深圳迈瑞生物医疗电子股份有限公司
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Application filed by 深圳迈瑞生物医疗电子股份有限公司 filed Critical 深圳迈瑞生物医疗电子股份有限公司
Priority to CN202080100940.1A priority Critical patent/CN115605244A/zh
Priority to PCT/CN2020/091190 priority patent/WO2021232268A1/fr
Publication of WO2021232268A1 publication Critical patent/WO2021232268A1/fr

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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. mouth-to-mouth respiration; Tracheal tubes

Definitions

  • the invention relates to medical equipment technology, in particular to a medical ventilation equipment, a control method and a storage medium.
  • Medical ventilation equipment currently used to assist patients in breathing includes high-frequency ventilators.
  • the respiration rate of high-frequency ventilators is 240-1800 breaths per minute to provide patients with more oxygen through the high-frequency ventilators.
  • the gas exhaust is to actively remove the gas in the patient pipeline through the exhaust device and the electric gas extraction device during the exhalation phase.
  • the exhaust device can be a proportional valve, and the exhaust can be exhausted through the opening and closing of the proportional valve.
  • the electric gas extraction device can be a turbine, and the gas in the patient pipeline can be exhausted through the negative pressure suction of the turbine.
  • the exhaust device and the electric gas extraction device are controlled according to the collected pressure, so that the exhaust device and the electric gas extraction device will interfere with each other during operation , Thereby reducing the control accuracy and stability of medical ventilation equipment.
  • the embodiments of the present invention provide a medical ventilation device, a control method, and a storage medium, which are used to improve the control accuracy and stability of the medical ventilation device.
  • the present invention provides a medical ventilation device, which includes a gas source interface, an inhalation branch, a high-frequency oscillation generating device, a controller, an exhaust device, and an electric gas extraction device;
  • the inhalation branch is respectively connected to the air source interface and the patient pipeline connected to the patient's respiratory system;
  • the high-frequency oscillation generating device generates high-frequency oscillations of the gas in the inhalation branch according to a preset high-frequency oscillation frequency
  • the controller is connected to the inhalation branch, the high-frequency oscillation generating device, the exhaust device and the electric gas extraction device, and when the medical ventilation device is in the high-frequency inhalation stage, it controls the high-frequency oscillation generation
  • the device generates high-frequency oscillations of the gas in the inhalation branch according to a preset high-frequency oscillation frequency, and the gas passes through the inhalation branch and the patient tube under the action of the high-frequency oscillation generated by the high-frequency oscillation generating device.
  • the working state of one of the exhaust device and the electric gas extraction device is adjusted with reference to the working state of the other device .
  • the present invention provides a method for controlling a medical ventilation device
  • the medical ventilation device includes a gas source interface, an inhalation branch, a high-frequency oscillation generating device, a controller, an exhaust device, and an electric gas extraction device.
  • the inhalation branch is respectively connected to the air source interface and the patient pipeline connected to the patient's respiratory system
  • the controller is connected to the inhalation branch, high-frequency oscillation generating equipment, exhaust device and electric gas extraction
  • the device is connected, the control method is applied to the controller, and the control method includes:
  • the high-frequency oscillation generating device When the medical ventilation device is in the high-frequency inhalation phase, the high-frequency oscillation generating device is controlled to generate high-frequency oscillations in the gas in the inhalation branch according to the preset high-frequency oscillation frequency, and the high-frequency oscillation The gas is output through the inhalation branch and the patient pipeline under the action of the high-frequency oscillation generated by the oscillation generating device;
  • the working state of the exhaust device and the working state of the electric gas extraction device are adjusted according to the set ventilation control parameters and the detected
  • the preset high-frequency oscillation frequency expels the gas exhaled by the patient through the patient pipeline
  • the working state of one of the exhaust device and the electric gas extraction device is adjusted with reference to the working state of the other device .
  • the present invention provides a storage medium with executable instructions stored on the storage medium, configured to cause a processor to execute the executable instructions to implement the above-mentioned method for controlling a medical ventilation device.
  • the controller in the above-mentioned medical ventilation equipment is connected with the inhalation branch, the high-frequency oscillation generating equipment, the exhaust device and the electric gas extraction device.
  • the high-frequency oscillation generating equipment is controlled in accordance with The preset high-frequency oscillation frequency generates high-frequency oscillations of the gas in the inhalation branch, and the gas is output through the inhalation branch and patient pipeline under the action of the high-frequency oscillation generated by the high-frequency oscillation generating device;
  • the high-frequency exhalation phase adjust the working state of the exhaust device and the working state of the electric gas extraction device according to the set ventilation control parameters and the detected patient pressure, so as to discharge the patient through the patient tube according to the preset high-frequency oscillation frequency
  • the controller adjusts the working state of the exhaust device and the working state of the electric gas extraction device, the working state of one of the exhaust device and the electric gas extraction device is adjusted with reference to the working state of the other device , So that the adjustment
  • Figure 1 is a schematic structural diagram of a medical ventilation device provided by an embodiment of the present disclosure
  • Figure 2 is a schematic structural diagram of another medical ventilation device provided by an embodiment of the present disclosure.
  • 3 and 4 are two schematic diagrams of preset fitting algorithms provided by embodiments of the present disclosure.
  • Fig. 5 is a schematic diagram of a regulating exhaust device and an electric gas extraction device provided by an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of the mapping relationship between the driving amount of the exhaust device and the electric gas extraction device provided by an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of the mapping relationship between the current of the exhaust device and the rotation speed of the electric gas extraction device according to an embodiment of the present disclosure
  • Figure 8 is a schematic diagram of yet another medical ventilation device provided by an embodiment of the present disclosure.
  • FIG. 9 is a flowchart of a method for controlling a medical ventilation device according to an embodiment of the present disclosure.
  • Fig. 10 is a flowchart of another method for controlling a medical ventilation device provided by an embodiment of the present disclosure.
  • the terms "include”, “include” or any other variants thereof are intended to cover non-exclusive inclusion, so that the method or server including a series of elements not only includes the explicitly recorded Elements, but also include other elements that are not explicitly listed, or also include elements inherent to the implementation method or server.
  • the element defined by the sentence "includes a" does not exclude the existence of other related elements in the method or server that includes the element (such as steps in the method or units in the server).
  • the unit may be a part of a circuit, a part of a processor, a part of a program or software, etc.).
  • the medical ventilation equipment provided by the embodiments of the present disclosure includes a series of devices, but the medical ventilation equipment provided by the embodiments of the present disclosure is not limited to include the explicitly stated devices.
  • the medical ventilation equipment control methods provided by the embodiments of the present disclosure It includes a series of steps, but the control method of the medical ventilation equipment provided by the embodiments of the present disclosure is not limited to the recorded steps.
  • “embodiments” are referred to, which describe a subset of all possible embodiments, but it is understandable that “embodiments” can be the same subset or different subsets of all possible embodiments. And can be combined with each other without conflict.
  • the ventilation frequency is greater than or equal to 4 times the normal frequency (referred to as normal frequency). For example, in China, the frequency is 240-1800 times per minute, which is called high frequency.
  • the U.S. Food and Drug Administration (FDA) defines high frequency as ventilation Frequency is greater than 150 times per minute;
  • High-frequency expiration stage and high-frequency inhalation stage are two stages of medical ventilation equipment.
  • the patient In the high-frequency expiration stage, the patient is in the process of high-frequency exhalation. During this process, the patient's exhaled air through the patient pipeline is During the high-frequency inhalation phase, the patient is in the process of high-frequency inhalation.
  • the medical ventilation equipment will produce high-frequency oscillation. Under the action of the high-frequency oscillation, gas, especially oxygen, is delivered to the patient’s lungs through the patient’s pipeline. Department;
  • Preset high pressure and preset low pressure It is the maximum pressure value and minimum pressure value corresponding to the medical ventilation equipment, such as the maximum and minimum gas pressure in the patient pipeline connected to the inspiratory branch, the gas pressure corresponding to the medical ventilation equipment can be Change from the preset high pressure to the preset low pressure with the patient's breathing;
  • Target average pressure the average value of the preset high pressure and the preset low pressure.
  • FIG. 1 shows an optional structure of a medical ventilation device provided by an embodiment of the present disclosure, including: an air source interface 10, an inhalation branch 20, a high-frequency oscillation generating device 30, a controller 40, The gas device 50 and the electric gas extraction device 60.
  • the inspiratory branch 20 is respectively connected to the air source interface 10 and the patient pipeline 70 connected to the patient's respiratory system.
  • the air source interface 10 is used as an input port of external air, which can input external air into the inhalation branch 20 through the air source interface 10, and deliver the air to the patient at the end of the patient pipeline through the inspiratory branch 20 and the patient pipeline 70 , Such as delivered to the lungs of the patient through the inspiratory branch 20 and the patient pipeline 70.
  • the patient pipeline 70 can be, but is not limited to, any one of a face mask and a patient breathing interface, and gas is delivered to the patient through any one of the face mask and the patient breathing interface.
  • the high-frequency oscillation generating device 30 generates high-frequency oscillations of the gas in the inhalation branch 20 according to a preset high-frequency oscillation frequency, so as to deliver the gas in the inhalation branch 20 to the patient's pipeline under the action of the high-frequency oscillation At the 70 end of the patient, the oxygen in the inhalation branch is mainly delivered to the patient under the action of high-frequency oscillation.
  • the preset high-frequency oscillation frequency is a working parameter of the high-frequency oscillation generating device 30.
  • the high-frequency oscillation frequency can be located in the above 240-1800 times per minute.
  • the specific value of the preset high-frequency oscillation frequency is The embodiment is not limited.
  • the air source interface 10 may include an oxygen source interface and/or an air source interface to respectively input oxygen and/or air from the oxygen source interface and/or air source interface to the inhalation branch 20, which is set in The high-frequency oscillation generating device 30 on the inspiratory branch 20 generates high-frequency oscillations of oxygen and/or air according to the preset high-frequency oscillation frequency, so that the oxygen can be delivered to the patient's pipeline under the action of the high-frequency oscillation, and reach the The patient at the end of the patient circuit.
  • the high-frequency oscillation generating device 30 adjusts the oxygen flow rate and/or the air flow rate during the high-frequency inhalation stage to generate high-frequency oscillations through the flow rate adjustment method.
  • the frequency oscillation generating device 30 can be, but is not limited to, a proportional solenoid valve, a blocking valve, an on-off valve and other valves capable of adjusting the flow rate, all of which can achieve the purpose of delivering oxygen to the patient.
  • the high-frequency oscillation generating device 30 may also use other methods to generate high-frequency oscillations, which will not be described in this embodiment.
  • the controller 40 is connected to the inhalation branch 20, the high-frequency oscillation generating device 30, the exhaust device 50 and the electric gas extraction device 60.
  • the high-frequency oscillation generating device 30 is controlled according to The preset high-frequency oscillation frequency generates high-frequency oscillations of the gas in the inhalation branch, and the gas is output through the inspiratory branch 20 and the patient pipeline under the action of the high-frequency oscillation generated by the high-frequency oscillation generating device 30; in medical ventilation
  • the working state of the exhaust device 50 and the working state of the electric gas extraction device 60 are adjusted to discharge according to the preset high-frequency oscillation frequency The patient's air exhaled through the patient circuit.
  • the high-frequency inhalation phase and the high-frequency expiration phase are the two working phases of medical ventilation equipment.
  • the patient is provided with oxygen and/or fresh air during the high-frequency inhalation phase, and the patient inhales oxygen and/or fresh air.
  • the gas in the patient's body especially carbon dioxide, is discharged. These gases are condensed in the inhalation branch 20.
  • the condensed gas is discharged through the exhaust device 50 and the electric gas extraction device 60. Therefore, the gas in the inhalation branch 20 can be discharged quickly and in time, so that the gas supply to the patient and the discharge of exhaust gas can be completed under the control of the controller 40.
  • the controller 40 adjusts the working state of the exhaust device 50 and the working state of the electric gas extraction device 60
  • the working state of one of the exhaust device 50 and the electric gas extraction device 60 refers to the other device.
  • the controller 40 adjusts the working state of the exhaust device 50 according to the set ventilation control parameters and the detected patient pressure, and while maintaining the exhaust device 50 in a working state, it adjusts with reference to the working state of the exhaust device 50
  • the working state of the electric gas extraction device 60 is to make the ventilation control parameters of the medical ventilation equipment consistent with the set ventilation control parameters under the action of the exhaust device 50 and the electric gas collection device 60.
  • the ventilation control parameter of the medical ventilation device is a parameter that the medical ventilation device provides ventilatory support during the working process. It can be at least one of the oscillation amplitude, the average pressure, the minimum pressure or the maximum pressure of the high-frequency oscillation of the medical ventilation device to provide ventilation support.
  • the set ventilation control parameters are the parameters set by the user and hope that the medical ventilation equipment can provide ventilation support during the working process, which can be the target oscillation amplitude of the high-frequency oscillation, the target average pressure, the preset low pressure or the preset high pressure At least one or more of them.
  • the oscillation amplitude and the lowest pressure Take the oscillation amplitude and the lowest pressure as an example. If the oscillation amplitude of the high-frequency oscillation is the same or close to the target oscillation amplitude, it means that the ventilation control parameters of the medical ventilation device are consistent with the set ventilation control parameters; if the minimum pressure corresponding to the medical ventilation device is the same as The preset low pressure (for example, the preset low pressure is 0) is the same/similar, indicating that the ventilation control parameters of the medical ventilation device are consistent with the set ventilation control parameters.
  • the average pressure, the lowest pressure, and the highest pressure corresponding to the medical ventilation device may be the pressure in the patient pipeline, the pressure in the inhalation branch, etc., which are not limited in this embodiment.
  • the controller 40 can adjust the working status of the exhaust device 50 and the electric gas extraction device 60 according to the set ventilation control parameters and the patient end pressure.
  • One of the adjustment processes is as follows:
  • the preset ventilation control parameters are the working parameters preset in the medical ventilation equipment, such as the above-mentioned preset low pressure and preset high pressure, etc.; the patient-side pressure is the pressure data during the patient's use of the medical ventilation equipment, and the patient-side pressure can be determined by The pressure detector provided on the patient end is obtained and expressed by the pressure in the patient pipeline or the inspiratory branch.
  • the target value is the index value when the medical ventilation equipment is in the target state, such as the target oscillation amplitude of the above-mentioned high-frequency oscillation, the target average pressure corresponding to the medical ventilation equipment, the preset low pressure and the preset high pressure corresponding to the medical ventilation equipment.
  • the actual value is the value of the current working state of the medical ventilation equipment, such as any of the above-mentioned high-frequency oscillation amplitude, the average pressure corresponding to the medical ventilation equipment, the lowest pressure and the highest pressure corresponding to the medical ventilation equipment; The corresponding relationship between the target value and the actual value is obtained by comparing the target value and the actual value.
  • the expression of the corresponding relationship can be but not limited to: the difference between the target value and the actual value, and the actual value relative to the target value.
  • Trend, and in the process of comparing the target value and the actual value, the compared parameters can have the following forms:
  • the target value at a certain moment (such as the current moment) can be compared with the actual value at the same moment;
  • the change trend of the target value in a time period can be compared with the change trend of the actual value in the same time period.
  • One of the time periods can take the current moment as the end time point, and move forward from the end time point.
  • the preset time length obtains a time period to adjust the working state of the above-mentioned exhaust device 50 and the electric gas extraction device 60 according to the change trend from the historical time to the current time.
  • the time period can also be determined in other ways. Not expounding
  • it can be the difference between the target value at two moments and the actual value at the same two moments.
  • the comparison relationship is obtained by comparing the difference, and the two moments of the difference are obtained. This embodiment is not limited.
  • the corresponding relationship between the target value and the actual value can be obtained, and then the working state of the exhaust device 50 and the electric gas extraction device 60 can be adjusted according to the corresponding relationship.
  • the medical ventilator When the medical ventilator is in the high-frequency exhalation phase, the patient is in the process of exhaling. The patient usually exhales every time he inhales. Therefore, the medical ventilator will repeatedly be in the high-frequency exhalation phase.
  • the adjustment of the working state of the exhaust device 50 and the electric gas extraction device 60 is also a repetitive process.
  • the working state of the exhaust device 50 and the electric gas extraction device 60 can be adjusted according to a certain frequency, for example, at least one high-frequency oscillation frequency can be separated.
  • the working conditions of the exhaust device 50 and the electric gas extraction device 60 are periodically adjusted.
  • the working status of the exhaust device 50 and the electric gas extraction device 60 can be adjusted according to the preset ventilation control parameters and the pressure at the patient end detected during the adjustment cycle.
  • the change of the patient pressure adjusts the working state of the exhaust device 50 and the electric gas extraction device 60, so that the working state of the exhaust device 50 and the electric gas extraction device 60 can be adjusted multiple times in one adjustment cycle; or in one adjustment period Only one patient-end pressure is obtained in a cycle, and then the working conditions of the exhaust device 50 and the electric gas extraction device 60 are adjusted once. Only one patient-end pressure obtained in one adjustment cycle can be detected at a time in one adjustment cycle Patient-side pressure, such as the pressure at a preset time or when the patient-side pressure is in a stable phase in the detection period.
  • the patient-side pressure obtained in one adjustment period can also be detected at multiple times in one adjustment period.
  • the pressure on the patient end is obtained, which is not limited in this embodiment.
  • the adjustment period can be set according to actual needs, and the adjustment period can be set to a fixed or variable length of time, or a preset or variable number of oscillation periods or breathing periods, etc.
  • the inhalation branch in medical ventilation equipment can have two functions, one is to provide oxygen and/or fresh air to the patient, and the other is that the gas exhaled by the patient can condense on the inhalation branch, that is to say, the inhalation
  • the air branch can assume the function of the expiratory branch, so that the exhaust device 50 and the electric gas extraction device 60 can be arranged on the inhalation branch 20, as shown in Figure 1 above, through the exhaust device in the high-frequency expiration phase 50 and the electric gas extraction device 60 discharge the condensed gas on the suction branch 20.
  • some medical ventilation devices also include an expiration branch 80, as shown in FIG. 2, where the inhalation branch 20 is used to provide oxygen and fresh air to the patient, and the expiration branch 80 Connected to the patient’s pipeline, the patient’s exhaled gas is condensed in the expiratory branch 80, and the patient’s exhaled gas is discharged through the expiratory branch 80.
  • an exhaust device can be used 50 and the electric gas extraction device 60 are arranged on the expiration branch 80, and the gas in the expiration branch 80 is actively discharged through the exhaust device 50 and the electric gas extraction device 60.
  • the controller 40 in the medical ventilation equipment can adjust the working state of the exhaust device 50 and the electric gas extraction device 60 in the above manner. .
  • the controller 40 in the medical ventilation equipment is connected to the inhalation branch 20, the high-frequency oscillation generating device 30, the exhaust device 50 and the electric gas extraction device 60, and the medical ventilation device is in high-frequency inhalation
  • the high-frequency oscillation generating device 30 is controlled to generate high-frequency oscillations of the gas in the inhalation branch 20 according to the preset high-frequency oscillation frequency, and the gas is inhaled under the action of the high-frequency oscillation generated by the high-frequency oscillation generating device 30 Branch 20, patient pipeline output; when the medical ventilation equipment is in the high-frequency exhalation phase, adjust the working state of the exhaust device 50 and the operation of the electric gas extraction device 60 according to the set ventilation control parameters and the detected patient end pressure State, the patient’s exhaled air through the patient’s pipeline is discharged at a preset high-frequency oscillation frequency, where the controller 40 is in the process of adjusting the working state of the exhaust device 50 and the working state of the electric gas extraction device 60, the exhaust
  • the working state of the exhaust device 50 may be adjusted first or the working state of the electric gas extraction device 60 may be adjusted first, and then the electric gas may be adjusted according to the working state of the exhaust device 50 or the working state of the electric gas extraction device 60 after adjustment.
  • the working state of the extraction device 60 or the working state of the exhaust device 50 may be adjusted first or the working state of the electric gas extraction device 60 may be adjusted first, and then the electric gas may be adjusted according to the working state of the exhaust device 50 or the working state of the electric gas extraction device 60 after adjustment.
  • the working state of the extraction device 60 or the working state of the exhaust device 50 may be adjusted first or the working state of the electric gas extraction device 60 may be adjusted first, and then the electric gas may be adjusted according to the working state of the exhaust device 50 or the working state of the electric gas extraction device 60 after adjustment.
  • the working state of the extraction device 60 or the working state of the exhaust device 50 may be adjusted first or the working state of the electric gas extraction device 60 may be adjusted first, and then the electric gas may be adjusted according to the working state
  • the controller 40 adjusts the exhaust device according to the preset adjustment relationship between the exhaust device and the electric gas extraction device.
  • the gas device 50 and the electric gas extraction device 60 The preset adjustment relationship between the exhaust device and the electric gas extraction device can indicate the relationship between the exhaust device and the working parameters of the electric gas extraction device.
  • the adjustment relationship can indicate the difference between the driving amount of the exhaust device and the driving amount of the electric gas extraction device.
  • the relationship between the driving amounts is used to adjust the driving amount of the exhaust device 50 and the driving amount of the electric gas extraction device 60 through the relationship between the driving amounts.
  • the relationship between the driving amount of the exhaust device and the driving amount of the electric gas extraction device may be a one-to-one adjustment relationship or a many-to-one adjustment relationship.
  • the controller 40 can be based on the driving amount of the exhaust device and the electric gas One-to-one adjustment relationship of the drive quantity of the extraction device, or according to the many-to-one adjustment relationship between the drive quantity of the exhaust device and the drive quantity of the electric gas extraction device, adjust the exhaust device and the electric gas extraction device, the many-to-one adjustment relationship It means that the multiple drive quantities of the exhaust device correspond to one drive quantity of the electric gas extraction device.
  • the controller 40 can determine the driving amount of one of the exhaust device 50 and the electric gas extraction device 60 according to the preset ventilation control parameters and the patient end pressure, and then according to the exhaust device The relationship between the driving amount and the electric gas extraction device determines the driving amount of another device to control the driving amount of the exhaust device 50 and the electric gas extraction device 60 to maintain the driving amount determined by the controller 40.
  • the controller may determine the driving amount of one of the exhaust device 50 and the electric gas extraction device 60 according to the preset ventilation control parameters and the patient-end pressure: obtaining the target value according to the preset ventilation control parameters, and according to the patient-end The actual value of the pressure is obtained, and the driving amount of one of the exhaust device 50 and the electric gas extraction device 60 is determined according to the corresponding relationship between the target value and the actual value.
  • the driving amount of one of the exhaust device 50 and the electric gas extraction device 60 is determined according to the corresponding relationship between the target value and the actual value.
  • the controller 40 can determine the driving amount of the electric gas extraction device 60 according to the above-mentioned one-to-one adjustment relationship.
  • the driving amount of the exhaust device is equal to
  • the one-to-one adjustment relationship of the driving amount of the electric gas extraction device may be a proportional relationship.
  • the so-called proportional relationship is that when the driving amount of the exhaust device 50 increases, the driving amount of the electric gas extraction device 60 also increases, so that each electric The driving amount of the gas extraction device 60 can only correspond to the driving amount of one exhaust device 50. In this way, the driving amount of the exhaust device and the electric gas extraction device can be continuously adjusted, thereby making the pressure control more stable.
  • the many-to-one adjustment relationship divides the drive capacity of the electric gas extraction device into multiple stages.
  • the drive capacity of one electric gas extraction device corresponds to the drive capacity of multiple exhaust devices.
  • the drive capacity of the electric gas extraction device will be based on The drive capacity of the exhaust device is automatically switched between different stages.
  • the driving amount of the electric gas extraction device can increase with the increase of the driving amount of the exhaust device.
  • the driving amount of the electric gas extraction device can also increase with the exhaust device.
  • the exhaust device and electric gas extraction device adopt a smaller driving amount, and when the amount of gas to be removed is large, the exhaust device and electric gas extraction device The device adopts a larger driving volume, so that the driving volume can be automatically adjusted with the gas volume, and can prevent the driving volume of the exhaust device and the electric gas extraction device from maintaining a large value, and reduce the exhaust device and the electric gas extraction device. Power consumption.
  • the manner in which the controller 40 performs adjustment according to the above-mentioned one-to-one adjustment relationship or the multiple-to-one adjustment relationship includes, but is not limited to, the following manners:
  • the controller 40 obtains the driving amount of the electric gas extraction device according to the driving amount of the exhaust device and a preset fitting algorithm; the preset fitting algorithm is used to fit one of the exhaust device and the electric gas extraction device.
  • the driving amount of the electric gas extraction device is fitted by a preset fitting algorithm; Figures 3 and 4 show two possible ways of the preset fitting algorithm.
  • the preset fitting algorithm shown in Figure 3 fits a one-to-one adjustment relationship
  • the preset fitting algorithm shown in Figure 4 can fit Based on the many-to-one adjustment relationship
  • the driving amount of the electric gas extraction device can be adjusted according to the preset fitting algorithm shown in any one of the drawings in FIG. 3 and FIG. 4.
  • the driving amount of the exhaust device is the current of the exhaust device (unit is A)
  • the driving amount of the electric gas extraction device is the speed of the electric gas extraction device
  • the minimum drive The quantity is the idling speed of the electric gas extraction device (unit: r/min).
  • the different stages shown in Fig. 4 are the rotation speeds of the electric gas extraction device in different gears. The current of the gas device and the speed of the electric gas extraction device are adjusted.
  • the controller 40 searches for the driving amount of the electric gas extraction device corresponding to the driving amount of the exhaust device from the preset driving amount correspondence table.
  • the preset driving amount correspondence table records the one-to-one adjustment relationship or the many-to-one adjustment relationship of the driving amount of the exhaust device and the electric gas extraction device.
  • the driving amount of the electric gas extraction device is obtained by looking up the table, and the preset driving amount is
  • the one-to-one adjustment relationship or the many-to-one adjustment relationship in the correspondence table can be the correspondence relationship established based on the working status of the historical exhaust device and the electric gas extraction device or the offline driving amount correspondence table obtained by debugging the medical ventilation equipment, so In the process of adjustment, an off-line look-up table method can be used to obtain the drive capacity of the electric gas extraction device.
  • the controller 40 may send a driving signal to the exhaust device and the electric gas extraction device to adjust the driving amount of the two devices with the driving signal.
  • the driving signal can be any of the driving current, driving voltage, and PWM (Pulse Width Modulation) signal, and the driving amount is the current, voltage, and the duty cycle of the PWM signal. Any parameter can change the opening of the exhaust device, and the opening of the exhaust device determines the exhaust volume of the exhaust device.
  • the driving signal can be any of the driving current, driving voltage, PWM signal, and driving speed
  • the driving amount is any of the current, voltage, duty cycle and speed of the PWM signal, etc.
  • the rotating speed of the electric gas extraction device determines the displacement of the electric extraction device.
  • the electric gas extraction device can be a turbine negative pressure device.
  • the rotation speed of the turbine negative pressure device is changed by the driving amount. The greater the high negative pressure attractive force, the greater the displacement.
  • the controller in the medical ventilation equipment may include a pressure controller, an opening controller, and a rotation speed controller.
  • the opening controller is used to adjust the driving amount of the exhaust device
  • the speed controller is used to adjust the driving amount of the electric gas extraction device, as shown in Figure 5, and the process is as follows:
  • the pressure controller determines the target value according to the preset ventilation control parameters and obtains the actual value according to the patient pressure.
  • the target value is the target average pressure in Figure 5
  • the actual value is the average pressure in Figure 5
  • the average pressure is based on The oscillation amplitude of the high-frequency oscillation is obtained.
  • the oscillation amplitude of the high-frequency oscillation is the oscillation amplitude generated during the inhalation and exhalation process of the patient using the medical ventilation equipment. It is related to the pressure at the patient end.
  • the pressure controller closes the target value and the actual value. Feedback to obtain the corresponding relationship between the target value and the actual value used to control the driving amount of the exhaust device, such as the pressure difference.
  • the pressure controller can obtain the target current of the exhaust device according to the corresponding relationship between the target value and the actual value, such as the pressure difference value or output the pressure difference value to the opening controller, and the opening controller obtains the exhaust device according to the pressure difference value
  • the target current the opening controller adjusts the current current of the exhaust device to the target current to adjust the opening size of the exhaust device
  • the speed controller obtains the electric gas extraction device according to the target current and the adjustment relationship between the target value and the actual value
  • the speed controller adjusts the current speed of the electric gas extraction device to the target speed.
  • the pressure controller will continue to determine whether the actual value matches the target value (if the actual value is the same as the target value), if it matches, it will stop the adjustment and maintain the current current of the exhaust device The current rotation speed of the electric gas extraction device remains unchanged. If it does not match, the current current of the exhaust device and the current rotation speed of the electric gas extraction device will continue to be adjusted.
  • the current of the exhaust device and the rotation speed of the electric gas extraction device are adjusted by the pressure controller, the opening controller and the rotation speed controller, so that the average pressure corresponding to the medical ventilation device can be maintained at the target average pressure.
  • the functions of the above-mentioned pressure controller, opening controller, and speed controller can be integrated into one controller, and one controller completes the adjustment of the current of the exhaust device and the speed of the electric gas extraction device. This is no longer in this embodiment. Elaboration.
  • controller 40 adjusts the driving amount of the exhaust device and the driving amount of the electric gas extraction device according to the adjustment relationship.
  • the controller 40 can also adjust the exhaust device and the electric gas extraction device in other ways, such as the following way :
  • the controller 40 may first adjust the driving amount of one of the exhaust device and the electric gas extraction device, and then start to adjust the driving amount of the other device when the driving amount of the adjusted device is greater than the preset driving amount.
  • the driving amount of the exhaust device may be adjusted first, and the driving amount of the electric gas extraction device may be adjusted when the driving amount of the exhaust device is greater than the preset driving amount (such as the maximum driving amount of the exhaust device).
  • the noise and power consumption of the electric gas extraction device may be greater than the noise and power consumption of the exhaust device. If the drive capacity of the exhaust device can meet the exhaust demand in the high-frequency exhalation phase, there is no need to turn on the electric gas extraction device or adjust The drive capacity of a large electric gas extraction device. Even if the electric gas extraction device needs to be turned on or the driving amount of the electric gas extraction device needs to be increased, the driving amount can be kept as small as possible to reduce the noise and power consumption of the electric gas extraction device.
  • the controller's adjustment process of the driving amount of the exhaust device may be to determine the driving amount of the exhaust device according to preset ventilation control parameters and patient pressure.
  • the ventilation control parameters of the medical ventilation equipment can be continuously monitored during the working process of the exhaust device controlled by the determined driving amount. If the ventilation control parameters of the medical ventilation equipment are inconsistent with the set ventilation control parameters, the patient pressure will be re-acquired and continue to be based on the forecast.
  • the set ventilation control parameters and the patient pressure determine the drive volume of the exhaust device. If the drive volume of the exhaust device is greater than the preset drive volume during repeated adjustments, the ventilation control parameters of the medical ventilation equipment still cannot reach the set ventilation control.
  • Parameter turn on the electric gas extraction device to exhaust gas through the exhaust device and the electric gas extraction device together, or increase the driving amount of the electric gas extraction device to increase the exhaust; if the driving amount of the exhaust device is adjusted for a certain time
  • the ventilation control parameters of the medical ventilation equipment are consistent with the set ventilation control parameters and the driving amount of the exhaust device is not greater than the preset driving amount, then the adjustment of the driving amount of the exhaust device is stopped and the electric gas extraction device does not need to be turned on.
  • the controller 40 may also adjust the driving amount of the electric gas extraction device first, and then start to adjust the driving amount of the exhaust device when the driving amount of the electric gas extraction device is greater than the preset driving amount.
  • the exhaust device needs to open an opening (for example, a preset driving amount corresponds to an opening and closing angle of the opening of the exhaust device and remains unchanged before the driving amount is adjusted)
  • Only the electric gas extraction device can provide outward attraction to the exhaust device, and the gas output through the opening of the exhaust device will be expelled under the action of the outward attraction.
  • the adjustment of the driving amount of the electric gas extraction device can also be adjusted according to the preset ventilation control parameters and the patient end pressure.
  • the adjustment of the driving amount of the electric gas extraction device has reached the preset driving amount, it still needs to be adjusted, Then, the adjustment of the driving amount of the electric gas extraction device can be stopped and switched to the adjustment of the driving amount of the exhaust device. This process is similar to the above-mentioned first adjusting the driving amount of the exhaust device and then adjusting the driving amount of the electric gas extraction device, and will not be described here.
  • the increase of the driving amount of the electric gas extraction device will increase the noise and power consumption of the electric gas extraction device, and the repeated adjustment of the driving amount of the electric gas extraction device will reduce the service life of the electric gas extraction device, especially
  • the drive capacity of the electric gas extraction device is maintained at the maximum drive capacity.
  • the price of the electric gas extraction device is also much higher than that of the exhaust device. For this reason, it is possible to consider adjusting the driving amount of the exhaust device first and then adjust the driving amount of the electric gas extraction device.
  • another way for the controller 40 to adjust the working status of the exhaust device and the electric gas extraction device is: if the driving amount of the exhaust device is within the first driving amount range, the controller 40 controls the electric gas extraction The device is in the first working state; if the driving amount of the exhaust device is within the second driving amount range, the controller 40 controls the electric gas extraction device to be in the second working state;
  • the maximum value of the first driving amount range is smaller than the minimum value of the second driving amount range, and the power consumption of the electric gas extraction device in the first working state and the second working state forms an increasing trend to pass the driving amount of the exhaust device
  • the scope controls the working state of the electric gas extraction device, so that the loss of the electric gas extraction device increases with the increase of the driving amount of the exhaust device, so that the driving amount of the exhaust device is within the first driving amount range. Maintain the loss of the electric gas extraction device in a small range and reduce the power consumption.
  • One way for the controller 40 to control the working state of the electric gas extraction device according to the range of the driving amount of the exhaust device is: if the driving amount of the exhaust device is within the first driving amount range, the controller 40 controls the electric gas extraction device If the driving amount of the exhaust device is within the second driving amount range, the controller 40 controls the driving amount of the electric gas extraction device to be in the second working state. Within the fourth driving amount range; the driving amount of the electric gas extraction device in the first working state is less than the driving amount in the second working state.
  • the method of controlling the driving amount of the electric gas extraction device can adopt the above adjustment relationship or adopt other methods.
  • the process of adjusting the working state of the exhaust device and the electric gas extraction device It involves the coordination logic of the exhaust device and the electric gas extraction device and their respective adjustment intensity, which affects the noise, power consumption and the service life of the electric gas extraction device of the medical ventilation equipment.
  • the noise of the medical ventilation equipment mainly comes from the exhaust device The impact of the opening and closing process of the opening and the rotation of the electric gas extraction device, and the faster the rotation, the higher the power consumption.
  • this embodiment sets the driving amount of the exhaust device and the electric gas extraction device as shown in FIG. 6 Mapping relationship (can also be regarded as one of the above adjustment relationships).
  • the driving volume map of the exhaust device and the electric gas extraction device is divided into three regions, namely the low-speed zone, the speed-regulating zone and the saturation zone.
  • the low-speed zone is mainly based on adjusting the driving volume of the exhaust device.
  • the driving volume of the electric gas extraction device is at a small driving volume (such as the minimum driving volume) or the driving volume is zero (ie, the electric gas extraction device).
  • the electric gas extraction device is in a stopped or standby working state to reduce the power consumption and noise caused by the rotation of the electric gas extraction device; the exhaust pressure in the high-frequency expiration phase in the speed control zone is greater than that in the low-speed zone In the speed control zone, adjust the drive volume of the exhaust device and the electric gas extraction device.
  • the adjustment relationship between the two can be but not limited to the drive volume of the electric gas extraction device with the drive volume of the exhaust device.
  • the electric gas extraction device is used to amplify the exhaust capacity of the exhaust device; the driving amount of the electric gas extraction device in the saturation zone is adjusted to the maximum driving amount, and the driving amount of the exhaust device will be adjusted according to the preset
  • the ventilation control parameters and the patient pressure are adjusted to increase the opening by increasing the driving volume of the exhaust device, thereby improving the exhaust capacity.
  • the purpose of setting the saturation zone is to reduce the noise caused by the exhaust device.
  • the drive capacity of the gas extraction device needs to be further reduced under the maximum drive capacity to further increase the drive capacity of the exhaust device.
  • the corresponding low-speed zone, speed-regulating zone and saturation zone are shown in Figure 7.
  • the current of the exhaust device is adjusted as Mainly, the rotation speed of the electric gas extraction device is the minimum rotation speed (Vidling speed ) or stops rotating; the current of the exhaust device and the rotation speed of the electric gas extraction device are adjusted in the speed control zone, and the rotation speed will increase with the increase of the current.
  • the speed of the electric gas extraction device in the speed regulation zone is adjusted between the minimum speed and the maximum speed; in the saturation zone, the speed of the electric gas extraction device is maintained at the maximum speed (Vmax), and the current of the exhaust device is adjusted to increase the exhaust capacity.
  • the driving range of the exhaust device may include at least three driving ranges, and the working state of the corresponding electric gas extraction device may have at least three working states.
  • the power consumption of these three working states will be Increase with the increase of the driving volume of the exhaust device to achieve precise control of the exhaust device and electric gas extraction device through multiple driving ranges and multiple working conditions, thereby improving the control accuracy and the stability of the pressure control .
  • the drive capacity of the exhaust device corresponds to three drive capacity ranges, namely: the first drive capacity range, the second drive capacity range, and the third drive capacity range.
  • the relationship between the three drive capacity ranges is the maximum of the first drive capacity range.
  • the value is less than the minimum value of the second driving amount range
  • the maximum value of the second driving amount range is less than the minimum value of the third driving amount range
  • the working state of the corresponding electric gas extraction device corresponds to three working states, namely: first Working state, second working state, and third working state.
  • the relationship between the three working states is: the power consumption of the electric gas extraction device in the first working state, the second working state and the third working state forms an increasing trend, based on this
  • the controller 40 adjusts the working state of the exhaust device and the electric gas extraction device is as follows: if the driving amount of the exhaust device is within the first driving amount range, the controller 40 controls the electric gas extraction device to be in the first working state; If the driving amount of the gas device is within the second driving amount range, the controller 40 controls the electric gas extraction device to be in the second working state; if the driving amount of the exhaust device is within the third driving amount range, the controller 40 controls the electric gas extraction device In the third working state.
  • the driving amount of the exhaust device is between the first driving amount and the second driving amount.
  • the first driving amount is 0 or the minimum driving amount
  • the second driving amount is the maximum driving amount.
  • the third driving amount is a driving amount between the first driving amount and the second driving amount. If it corresponds to three driving quantities, it can be based on the two driving quantity ranges, adding a driving quantity range from the third driving quantity to the second driving quantity. For other types of driving quantity ranges, we will not explain one by one here. .
  • the division of the working state of the electric gas extraction device is similar to the division of the drive capacity of the exhaust device, and will not be described in detail. Of course, in addition to being divided into three driving ranges and three working states, it can also be divided into other required driving ranges and working states according to actual needs.
  • the controller 40 can adjust the working state of the electric gas extraction device according to the driving amount of the exhaust device, and reduce the noise and power consumption caused by the electric gas extraction device by preferentially adjusting the driving amount of the exhaust device, and Improve the service life of the electric gas extraction device.
  • FIG. 8 shows an optional structure of a medical ventilation device provided by an embodiment of the present disclosure.
  • the collecting device 90 can be arranged on the inspiratory branch and collect the pressure in the inspiratory branch as the patient pressure; if the medical ventilation equipment also includes the above-mentioned expiratory branch 80, the collecting device 90 can also be arranged on the inspiratory branch. On any branch of the exhalation branch, the collecting device 90 collects the pressure in the branch where it is located as the patient end pressure.
  • the corresponding controller determines the target value according to the set ventilation control parameters, and controls the working parameters of the exhaust device to adjust the working state of the exhaust device according to the patient pressure and the target value collected by the collection device, and the controller according to The working parameters of the exhaust device control the working parameters of the electric gas extraction device to adjust the working state of the electric gas extraction device.
  • the working parameters of the exhaust device and the electric gas extraction device can be the above-mentioned driving quantities, such as current, voltage, etc.,
  • the process of the controller controlling the exhaust device and the electric gas extraction device please refer to the above-mentioned process of adjusting the driving amount, which will not be described in detail here.
  • an optional structure of the exhaust device is: the exhaust device includes a switch element and a driving device that controls the opening and closing of the switch element. If the medical ventilation equipment only includes the inspiratory branch, the switch element can be set in the inspiratory branch to block the inspiratory branch; if the medical ventilation equipment includes the inspiratory branch and the expiratory branch, the switch element can be Set in the expiratory branch, used to block the expiratory branch.
  • the switch element is used to block the branch circuit where the switch element is located from communicating with the atmosphere when the medical ventilation equipment is in the high-frequency inhalation phase, so that the gas can be delivered to the patient, while the medical ventilation equipment is in the high-frequency exhalation phase.
  • the middle switch element connects the branch where the switch element is located with the atmosphere, so that the gas in the patient pipeline is discharged through the switch element.
  • the driving device controls the switching element to be turned on during the high-frequency expiration phase of the medical ventilation equipment, so that the branch where the switching element is located is connected to the atmosphere; when the medical ventilation equipment is in the high-frequency inhalation phase, it controls the switching element Closed to block the communication between the branch where the switching element is located and the atmosphere.
  • the driving device can be a motor that provides power support for the switching element.
  • the driving device can be a voice coil motor capable of linear and bidirectional movement.
  • the switching element is driven by the voice coil motor, because the voice coil motor is a motor that can move linearly and bidirectionally. Therefore, the voice coil motor can output the force in proportion to the current, and quickly control the opening and closing of the switching element. When the switching element is opened, it is connected to the atmosphere, and when it is closed, the connection with the atmosphere is blocked.
  • a certain negative pressure suction can be generated at the moment when the switch element is turned on, and the gas can be discharged more effectively without being affected by the air removal resistance, tidal volume and ventilation frequency, ensuring that the average pressure will not be caused by the above factors to cause the gas to be removed too slowly. Elevated.
  • the process of the controller 40 and the driving device controlling the switching element is as follows:
  • the controller 40 sends a driving signal to the driving device according to the preset ventilation control parameters and the pressure at the patient's end.
  • the driving device controls at least one of the opening and closing angle, the opening frequency, and the opening duration of the opening of the switching element according to the driving signal, so as to realize the initiative by controlling at least one of the opening and closing angle, the opening frequency and the opening duration Exhaust and control of exhaust volume.
  • the opening and closing angle indicates the opening and closing amount of the opening.
  • the larger the opening and closing amount the larger the communication port between the branch where the switching element is located and the atmosphere, and the larger the corresponding exhaust volume.
  • the smaller the opening and closing amount indicates that the branch where the switching element is located and
  • the smaller the connecting port of the atmosphere the smaller the corresponding exhaust volume;
  • the opening duration indicates the time that the exhaust device is continuously opened during the high-frequency exhalation phase of the medical ventilation equipment.
  • the longer the opening duration the more the exhaust gas will be discharged.
  • the opening duration represents the duration of one opening or the sum of the durations of multiple openings. The duration of different times of opening can be the same.
  • the opening frequency indicates the number of times the exhaust device is opened during the high-frequency exhalation phase of the medical ventilation equipment. The greater the opening frequency, the more times the exhaust device is opened.
  • the exhaust device is adjusted by at least one of the above-mentioned opening and closing angle, opening frequency, and opening duration.
  • one form of the driving signal sent by the controller 40 may be a control waveform, so that the driving device controls the switching element through at least one waveform.
  • the manner in which the controller 40 generates the control waveform may be, but is not limited to, the controller 40 according to
  • the preset ventilation control parameters and patient end pressure generate a control waveform for controlling the exhaust device, so that the control waveform is related to the patient end pressure.
  • the specific control waveform can control the opening and closing angle, opening frequency and opening frequency of the opening of the switch element. At least one of the opening durations is associated with the pressure at the patient end, so that the switch element can discharge gas in time and maintain the average pressure in the patient circuit close to the target average pressure.
  • the control waveform can be, but is not limited to, any one of a sine wave, a cosine wave, a square wave, a triangle wave, an exponential function waveform, and an Nth-order function waveform, and N is greater than or equal to 2.
  • the switching element can be any valve that can block the branch where the switching element is located.
  • the switching element can include any one of a proportional exhaust valve, an on-off valve, and a solenoid valve.
  • the control waveform generated by the controller 40 may be different. This is because although the on-off valve and the solenoid valve have two modes of opening and closing, the opening and closing angles of the on-off valve and the solenoid valve are fixed, so they are suitable for switching
  • the control waveform of the valve and the solenoid valve can be a waveform that controls its opening and closing but cannot change its opening and closing angle.
  • the opening and closing angle of the opening of the proportional exhaust valve is controllable, so the corresponding control waveforms of the proportional exhaust valve are the above-mentioned sine wave, cosine wave, square wave, triangle wave, exponential function waveform and N times Any one of the function waveforms, N is greater than or equal to 2.
  • the opening and closing angle can be controlled by current, voltage, and duty cycle.
  • the corresponding driving amount of the exhaust device is the current, voltage and the duty cycle of the driving signal of the exhaust device, and the opening and closing frequency is when the opening is in the open state.
  • the number of times the opening is opened, the opening duration is the time the opening is in the open state.
  • the driving amount of the exhaust device includes not only the current, voltage and the duty cycle of the driving signal of the exhaust device, but also the controllable
  • the parameter of the opening frequency or the opening duration such as a time parameter, is used to control the opening frequency or the opening duration through the time parameter.
  • an optional structure of the electric gas extraction device is: the electric gas extraction device includes a motor and a rotating part; the controller 40 can send the drive for controlling the rotating part to the motor according to the driving amount of the exhaust device.
  • the motor controls the driving amount of the rotating part according to the driving signal, such as sending a driving signal to control the speed of the rotating part, and the motor controlling the speed of the rotating part according to the driving signal, such as controlling the current or voltage of the rotating part according to the driving signal , In order to control the speed of the rotating parts by controlling the current or voltage of the rotating parts.
  • the embodiments of the present disclosure also provide a method for controlling medical ventilation equipment, wherein the medical ventilation equipment includes an air source interface, an inhalation branch, a high-frequency oscillation generating device, a controller, an exhaust device, and The electric gas extraction device, the exhaust device and the electric gas extraction device can be arranged on the inhalation branch; or, the medical ventilation equipment also includes an expiration branch, which is connected to the patient pipeline to discharge the patient's exhaled gas; the exhaust device and The electric gas extraction device is arranged on the expiratory branch.
  • the medical ventilation equipment includes an air source interface, an inhalation branch, a high-frequency oscillation generating device, a controller, an exhaust device, and The electric gas extraction device, the exhaust device and the electric gas extraction device can be arranged on the inhalation branch; or, the medical ventilation equipment also includes an expiration branch, which is connected to the patient pipeline to discharge the patient's exhaled gas; the exhaust device and The electric gas extraction device is arranged on the expiratory branch.
  • control method of the medical ventilation equipment is applied to the controller, and the corresponding flowchart is shown in Fig. 9, which may include the following steps:
  • the working state of one of the exhaust device and the electric gas extraction device is adjusted with reference to the working state of the other device.
  • adjust the working state of the exhaust device according to the set ventilation control parameters and the detected patient pressure, while maintaining the exhaust device in a working state adjust the operation of the electric gas extraction device with reference to the working state of the exhaust device
  • the state is to make the ventilation control parameters of the medical ventilation equipment consistent with the set ventilation control parameters under the action of the exhaust device and the electric gas collection device.
  • the adjustment process of adjusting the working status of the exhaust device and the electric gas extraction device according to the set ventilation control parameters and the patient-side pressure is as follows:
  • the preset ventilation control parameters are the working parameters preset in the medical ventilation equipment, such as the above-mentioned preset low pressure and preset high pressure, etc.; the patient-side pressure is the pressure data during the patient's use of the medical ventilation equipment, and the patient-side pressure can be determined by The pressure detector provided on the patient end is obtained and expressed by the pressure in the patient pipeline or the inspiratory branch.
  • the target value is the index value when the medical ventilator is in the target state, and the actual value is the value when the medical ventilator is in the current working state.
  • the corresponding relationship between the two is obtained by comparing the target value and the actual value, such as corresponding
  • the manifestation of the relationship can be, but is not limited to: the difference between the target value and the actual value, the change trend of the actual value relative to the target value, and during the comparison process of the target value and the actual value, the comparison parameters can have The following form:
  • the target value at a certain moment (such as the current moment) can be compared with the actual value at the same moment; in the other form, the change trend of the target value in a period of time can be compared with the actual value in the same period of time. Compare the trend of change; in another form, it can be the difference between the target value at two moments and the actual value at the same two moments. The comparison relationship is obtained by comparing the difference.
  • the two moments when the difference is obtained are not limited in this embodiment.
  • the corresponding relationship between the target value and the actual value can be obtained, and then the working state of the exhaust device and the electric gas extraction device can be adjusted according to the corresponding relationship.
  • the medical ventilator When the medical ventilator is in the high-frequency exhalation phase, the patient is in the process of exhaling. The patient usually exhales every time he inhales. Therefore, the medical ventilator will repeatedly be in the high-frequency exhalation phase.
  • the adjustment of the working state of the exhaust device and the electric gas extraction device is also a repetitive process, such as adjusting the working state of the exhaust device and the electric gas extraction device according to a certain frequency, for example, the exhaust can be adjusted at least one oscillation period of the high-frequency oscillation frequency The working status of the device and the electric gas extraction device.
  • the working status of the exhaust device and the electric gas extraction device can be adjusted according to the preset ventilation control parameters and the patient-end pressure detected during the adjustment cycle.
  • the change of the end pressure adjusts the working state of the exhaust device and the electric gas extraction device, so that the working state of the exhaust device and the electric gas extraction device can be adjusted multiple times in one adjustment period; or only one patient end can be obtained in one adjustment period.
  • Pressure and then adjust the working status of the exhaust device and the electric gas extraction device once.
  • Only one patient-end pressure obtained in one adjustment cycle can be the patient-end pressure detected at a time in one adjustment cycle, such as a preset one The pressure at the time or when the pressure at the patient end is detected in the steady phase of the adjustment period.
  • the patient end pressure obtained in one adjustment period can also be obtained based on the patient end pressure detected at multiple times in the adjustment period.
  • This embodiment is not limited.
  • the adjustment period can be set according to actual needs, and the adjustment period can be set to a fixed or variable length of time, or a preset or variable number of oscillation periods or breathing periods, etc.
  • one way to adjust the working state of the exhaust device and the electric gas extraction device is as follows: adjust the exhaust device and the electric gas extraction device according to the preset adjustment relationship between the exhaust device and the electric gas extraction device.
  • the preset adjustment relationship between the exhaust device and the electric gas extraction device can indicate the relationship between the exhaust device and the working parameters of the electric gas extraction device.
  • the adjustment relationship can indicate the difference between the driving amount of the exhaust device and the driving amount of the electric gas extraction device.
  • the relationship between the driving amount and the driving amount of the exhaust device and the driving amount of the electric gas extraction device are adjusted by the relationship between the driving amounts.
  • the relationship between the driving amount of the exhaust device and the driving amount of the electric gas extraction device can be a one-to-one adjustment relationship or a many-to-one adjustment relationship, so that the adjustment of the working state can be based on the driving amount of the exhaust device and One-to-one adjustment relationship of the driving amount of the electric gas extraction device, or according to the many-to-one adjustment relationship between the driving amount of the exhaust device and the driving amount of the electric gas extraction device, adjust the exhaust device and the electric gas extraction device, many-to-one
  • the adjustment relationship indicates that multiple drive quantities of the exhaust device correspond to one drive quantity of the electric gas extraction device.
  • the drive capacity of one of the exhaust device and the electric gas extraction device is determined according to the preset ventilation control parameters and the patient-end pressure, and then according to the drive capacity of the exhaust device and the electric gas extraction device To determine the driving amount of another device to control the driving amount of the exhaust device and the electric gas extraction device to maintain the driving amount determined by the controller.
  • the method of determining the driving amount of one of the exhaust device and the electric gas extraction device according to the preset ventilation control parameters and the patient end pressure may be: obtaining the target value according to the preset ventilation control parameters, and obtaining the actual value according to the patient end pressure , According to the corresponding relationship between the target value and the actual value to determine the drive capacity of one of the exhaust device and the electric gas extraction device.
  • the drive quantity of the electric gas extraction device is determined according to the above-mentioned one-to-one adjustment relationship.
  • the drive quantity of the exhaust device is equal to the drive quantity of the electric gas extraction device.
  • the one-to-one adjustment relationship can be a proportional relationship.
  • the so-called proportional relationship means that when the driving amount of the exhaust device increases, the driving amount of the electric gas extraction device also increases, so that the driving amount of each electric gas extraction device can only correspond to one exhaust. In this way, the drive capacity of the exhaust device and the electric gas extraction device can be continuously adjusted, thereby making the pressure control more stable.
  • the many-to-one adjustment relationship divides the drive capacity of the electric gas extraction device into multiple stages.
  • the drive capacity of one electric gas extraction device corresponds to the drive capacity of multiple exhaust devices.
  • the drive capacity of the electric gas extraction device will be based on The drive capacity of the exhaust device is automatically switched between different stages.
  • the driving amount of the electric gas extraction device can increase with the increase of the driving amount of the exhaust device.
  • the driving amount of the electric gas extraction device can also increase with the exhaust device.
  • the exhaust device and the electric gas extraction device adopt a smaller driving amount, and when the amount of gas to be removed is large, the exhaust device and electric gas extraction device are used.
  • the device adopts a larger driving volume, so that the driving volume can be automatically adjusted with the gas volume, and can prevent the driving volume of the exhaust device and the electric gas extraction device from maintaining a large value, and reduce the exhaust device and the electric gas extraction device. Power consumption.
  • the manner of adjusting according to the above-mentioned one-to-one adjustment relationship or the multiple-to-one adjustment relationship includes, but is not limited to, the following manners:
  • the drive volume of the electric gas extraction device is obtained; the preset fitting algorithm is used to fit the one-to-one adjustment of the exhaust device and the electric gas extraction device Relationship or many-to-one adjustment relationship, after obtaining the driving amount of the exhaust device according to the preset ventilation control parameters and the patient pressure, the driving amount of the electric gas extraction device is fitted by a preset fitting algorithm; another way , Find the drive capacity of the electric gas extraction device corresponding to the drive capacity of the exhaust device from the preset drive capacity correspondence table.
  • the preset driving amount correspondence table records the one-to-one adjustment relationship or the many-to-one adjustment relationship of the driving amount of the exhaust device and the electric gas extraction device.
  • the driving amount of the electric gas extraction device is obtained by looking up the table, and the preset driving amount is
  • the one-to-one adjustment relationship or the many-to-one adjustment relationship in the correspondence table can be the correspondence relationship established based on the working status of the historical exhaust device and the electric gas extraction device or the offline driving amount correspondence table obtained by debugging the medical ventilation equipment, so In the process of adjustment, an off-line look-up table method can be used to obtain the drive capacity of the electric gas extraction device.
  • a driving signal can be sent to the exhaust device and the electric gas extraction device to adjust the driving amount of the two devices with the driving signal.
  • the drive signal can be any of the drive current, drive voltage, and PWM signal, and the drive amount is any one of the current, voltage, and the duty cycle of the PWM signal, etc., which can change the exhaust device’s performance.
  • the parameter of the opening, the opening of the exhaust device determines the exhaust volume of the exhaust device.
  • the driving signal can be any of the driving current, driving voltage, PWM signal, and driving speed
  • the driving amount is any of the current, voltage, duty cycle and speed of the PWM signal, etc.
  • the rotating speed of the electric gas extraction device determines the displacement of the electric extraction device.
  • the electric gas extraction device can be a turbine negative pressure device.
  • the rotation speed of the turbine negative pressure device is changed by the driving amount. The greater the high negative pressure attractive force, the greater the displacement.
  • the exhaust device and the electric gas extraction device can also be adjusted in other ways, such as the following ways:
  • Adjust the driving amount of one of the exhaust device and the electric gas extraction device and start to adjust the driving amount of the other device when the driving amount of the adjusted device is greater than the preset driving amount. For example, adjust the drive volume of the exhaust device first, and start to adjust the drive volume of the electric gas extraction device when the drive volume of the exhaust device is greater than the preset drive volume (such as the maximum drive volume of the exhaust device), the noise and the noise of the electric gas extraction device
  • the power consumption is greater than the noise and power consumption of the exhaust device.
  • the drive capacity of the exhaust device can meet the exhaust demand in the high-frequency exhalation phase, there is no need to turn on the electric gas extraction device and even if the electric gas extraction device needs to be turned on With a smaller drive capacity, the noise and power consumption of the electric gas extraction device are reduced.
  • the controller's adjustment process of the driving amount of the exhaust device which will not be described in detail in this embodiment.
  • another way to adjust the working state of the exhaust device and the electric gas extraction device is to control the electric gas extraction device to be in the first working state if the driving amount of the exhaust device is within the first driving amount range ; If the driving amount of the exhaust device is within the second driving amount range, control the electric gas extraction device to be in the second working state;
  • the maximum value of the first driving amount range is smaller than the minimum value of the second driving amount range, and the power consumption of the electric gas extraction device in the first working state and the second working state forms an increasing trend to pass the driving amount of the exhaust device
  • the scope controls the working state of the electric gas extraction device, so that the loss of the electric gas extraction device increases with the increase of the driving amount of the exhaust device, so that the driving amount of the exhaust device is within the first driving amount range. Maintain the loss of the electric gas extraction device in a small range and reduce the power consumption.
  • the driving range of the exhaust device may include at least three driving ranges, and the working state of the corresponding electric gas extraction device may have at least three working states.
  • the power consumption of these three working states will vary with The drive volume of the exhaust device increases with the increase, so as to achieve precise control of the exhaust device and the electric gas extraction device through multiple driving ranges and multiple working states, thereby improving the control accuracy and the stability of the pressure control.
  • One way to control the working state of the electric gas extraction device according to the range of the driving amount of the exhaust device is: if the driving amount of the exhaust device is within the first driving amount range, the controller controls the driving amount of the electric gas extraction device to In the third driving range corresponding to the first working state; if the driving amount of the exhaust device is in the second driving range, the controller controls the driving amount of the electric gas extraction device to be in the fourth driving range corresponding to the second working state Inside; the driving amount of the electric gas extraction device in the first working state is less than the driving amount in the second working state.
  • the method of controlling the driving amount of the electric gas extraction device can adopt the above-mentioned adjustment relationship or adopt other methods, such as the above-mentioned low-speed zone, speed-regulating zone and saturation zone. Please specify See the above example.
  • the medical ventilation equipment may further include: a collecting device, which collects the pressure at the patient's end.
  • adjusting the working state of the exhaust device and the working state of the electric gas extraction device according to the set ventilation control parameters and the detected patient pressure includes: determining the target value according to the set ventilation control control parameters, and collecting the data according to the collection device Control the working parameters of the exhaust device to adjust the working state of the exhaust device; according to the working parameters of the exhaust device, control the working parameters of the electric gas extraction device to adjust the working state of the electric gas extraction device.
  • the working parameters of the exhaust device and the electric gas extraction device can be the above-mentioned driving quantities, such as current, voltage, etc.
  • driving quantities such as current, voltage, etc.
  • For the process of controlling the exhaust device and the electric gas extraction device please refer to the above-mentioned process of adjusting the driving quantity, which will not be detailed here. Narrated.
  • the flow of the control method of the medical ventilation equipment provided in this embodiment will be described. As shown in FIG. 10, it may include the following steps:
  • 1001 Determine the target value according to the preset ventilation control parameters.
  • the target value and the actual value are the target average pressure respectively
  • the average pressure corresponding to the medical ventilation equipment the corresponding relationship is the pressure difference.
  • 1003 Obtain the target current of the exhaust device according to the corresponding relationship between the target value and the actual value, adjust the current current of the exhaust device as the target current, and adjust the opening size of the exhaust device with the target current.
  • the target speed of the electric gas extraction device is obtained, and the current speed of the electric gas extraction device is adjusted to the target speed.
  • step 1005 Determine whether the target value matches the actual value, if it matches, perform step 1006 to stop the adjustment; if it does not match, return to step 1002 to recalculate the actual value according to the patient end pressure.
  • the embodiment of the present disclosure also provides a storage medium storing executable instructions, configured to cause a processor to execute the executable instructions to implement the above-mentioned control method of the medical ventilation device.
  • the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present invention may adopt the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including disk storage, optical storage, etc.) containing computer-usable program codes.
  • a computer-usable storage media including disk storage, optical storage, etc.
  • These computer program operations can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the operations stored in the computer-readable memory produce an article of manufacture including the operating device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ventilation (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif de ventilation médicale, un procédé de commande et un support d'enregistrement. Lorsque le dispositif de ventilation médical se trouve dans une phase d'inhalation à haute fréquence, un dispositif de génération d'oscillation à haute fréquence (30) est commandé pour générer une oscillation à haute fréquence pour un gaz dans une branche d'inhalation (20) selon une fréquence d'oscillation à haute fréquence prédéfinie, et le gaz est évacué par la branche d'inhalation (20) et un tuyau de patient (70) sous l'action de l'oscillation à haute fréquence; lorsque le dispositif de ventilation médical se trouve dans une phase d'expiration à haute fréquence, un état de fonctionnement d'un moyen de ventilation (50) et un état de fonctionnement d'un moyen de pompage de gaz électrique (60) sont ajustés en fonction de paramètres de commande de ventilation définis et d'une pression mesurée côté patient, et dans le processus d'ajustement des états de fonctionnement, l'état de fonctionnement de l'un des moyens de ventilation (50) et du moyen de pompage de gaz électrique (60) est ajusté par rapport à l'état de fonctionnement de l'autre moyen, de telle sorte que les réglages des états de fonctionnement des deux moyens ne s'affectent pas mutuellement, et en outre, les paramètres de commande de ventilation du dispositif de ventilation médical sont cohérents avec les paramètres de commande de ventilation réglés au moyen des réglages des états de fonctionnement des moyens de ventilation (50) et des moyens de pompage de gaz électriques (60), améliorant ainsi la précision et la stabilité de la commande.
PCT/CN2020/091190 2020-05-20 2020-05-20 Dispositif de ventilation médicale, procédé de commande et support d'enregistrement WO2021232268A1 (fr)

Priority Applications (2)

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CN202080100940.1A CN115605244A (zh) 2020-05-20 2020-05-20 医用通气设备、控制方法及存储介质
PCT/CN2020/091190 WO2021232268A1 (fr) 2020-05-20 2020-05-20 Dispositif de ventilation médicale, procédé de commande et support d'enregistrement

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165398A (en) * 1989-12-08 1992-11-24 Bird F M Ventilator and oscillator for use therewith and method
US20010007256A1 (en) * 2000-01-11 2001-07-12 Suzuki Motor Corporation High-frequency oscillation artificial respiration apparatus
CN103384541A (zh) * 2010-12-21 2013-11-06 皇家飞利浦电子股份有限公司 具有集成的鼓风机的通气机
CN104780979A (zh) * 2012-08-31 2015-07-15 3M创新有限公司 用于个人防护呼吸装置的动力排气设备
CN104936644A (zh) * 2013-01-17 2015-09-23 皇家飞利浦有限公司 用于在高频正压通气期间控制气道气体参数的系统和方法
CN110464950A (zh) * 2019-08-29 2019-11-19 宁波戴维医疗器械股份有限公司 一种高频呼吸机系统及通气控制方法
CN210057034U (zh) * 2019-01-29 2020-02-14 无锡圣诺亚科技有限公司 一种正负压交替呼吸支持系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165398A (en) * 1989-12-08 1992-11-24 Bird F M Ventilator and oscillator for use therewith and method
US20010007256A1 (en) * 2000-01-11 2001-07-12 Suzuki Motor Corporation High-frequency oscillation artificial respiration apparatus
CN103384541A (zh) * 2010-12-21 2013-11-06 皇家飞利浦电子股份有限公司 具有集成的鼓风机的通气机
CN104780979A (zh) * 2012-08-31 2015-07-15 3M创新有限公司 用于个人防护呼吸装置的动力排气设备
CN104936644A (zh) * 2013-01-17 2015-09-23 皇家飞利浦有限公司 用于在高频正压通气期间控制气道气体参数的系统和方法
CN210057034U (zh) * 2019-01-29 2020-02-14 无锡圣诺亚科技有限公司 一种正负压交替呼吸支持系统
CN110464950A (zh) * 2019-08-29 2019-11-19 宁波戴维医疗器械股份有限公司 一种高频呼吸机系统及通气控制方法

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