Sputum excretion device, sputum detection device, breathing machine and sputum excretion method of breathing machine

Abstract

The invention provides a sputum excretion device, a sputum detection device, a breathing machine and a sputum excretion method of the breathing machine, and relates to the technical field of medical instruments.The sputum excretion device comprises a breathing pipeline, an air source, an air supply channel connected with the breathing pipeline to be communicated with a breathing system, an oscillation module, a detection module and a control module; the control module is used for controlling the oscillation module to generate first airflow with different oscillation frequencies; determining airflow characteristics under different oscillation frequencies according to an airflow detection signal obtained through a detection module, and determining a target oscillation frequency range in which the airflow characteristics meet a preset condition in different oscillation frequencies; determining a target working frequency and / or a target working amplitude according to the target oscillation frequency range; according to the target working frequency and / or the target working amplitude, the oscillation module is controlled to generate oscillation airflow for promoting sputum excretion of the patient, the appropriate oscillation airflow can be provided for the patient to promote sputum excretion, and the accuracy and effectiveness of sputum excretion treatment are improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a sputum expectoration device, a sputum detection device, a ventilator, and a method for expectorating sputum. Background Technology

[0002] In the medical field, the worsening of lung diseases such as pulmonary edema, bronchiectasis, lung infections, and lung cancer is often closely related to the accumulation and difficulty in clearing sputum. Sputum accumulation not only increases the risk of infection but also severely impacts patients' respiratory function and quality of life. Especially during the postoperative recovery period, timely sputum clearance is crucial for rapid recovery. However, the efficiency and effectiveness of sputum clearance are often limited by various factors, including sputum viscosity, airway patency, and the patient's own respiratory capacity.

[0003] To promote expectoration, current medical procedures effectively loosen sputum by delivering pulses of pressurized gas to the lungs. However, the effectiveness of this method largely depends on the settings of parameters such as the gas vibration frequency and amplitude. These parameters vary depending on the patient or the patient's clinical condition, and currently, setting these parameters relies heavily on the experience of healthcare professionals and repeated trials. This not only increases the workload of healthcare workers but also affects the accuracy and effectiveness of expectoration therapy, leading to a poor patient experience. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this application. This overview is not intended to limit the scope of the claims.

[0005] This application provides a sputum expectoration device, a sputum detection device, a ventilator, and a sputum expectoration method thereof, which can provide patients with a suitable oscillating airflow to promote sputum expectoration and improve the accuracy and effectiveness of sputum expectoration treatment.

[0006] On one hand, embodiments of this application provide a sputum suction device, including:

[0007] Breathing tubing is used to connect to a patient's respiratory system;

[0008] An air source is connected to the breathing tube to form an air supply channel communicating with the respiratory system; the air source is used to provide airflow to the air supply channel.

[0009] An oscillation module, connected to or installed on the air supply duct, is used to cause the airflow provided by the air source to oscillate.

[0010] A detection module is installed on the air supply duct to detect the airflow in the air supply duct and obtain an airflow detection signal.

[0011] A control module, connected to the oscillation module and the detection module, is used for:

[0012] The oscillation module is controlled to generate first airflows with different oscillation frequencies;

[0013] Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined;

[0014] The target operating frequency and / or target operating amplitude of the oscillation module are determined based on the target oscillation frequency range.

[0015] The control module is configured to control the oscillation module to generate an oscillating airflow to promote the patient's expectoration based on the target operating frequency and / or the target operating amplitude; or, the control module is configured to output the target operating frequency and / or the target operating amplitude to suggest to the user that the oscillation module be controlled at the target operating frequency and / or the target operating amplitude to generate an oscillating airflow to promote the patient's expectoration.

[0016] In one embodiment of this application, the detection module includes a flow rate detection component and a pressure detection component;

[0017] The airflow detection signal includes: the flow velocity signal of the first airflow obtained by the flow velocity detection component, and the pressure signal of the first airflow obtained by the pressure detection component.

[0018] In one embodiment of this application, the control module is configured to determine airflow characteristics at different oscillation frequencies based on airflow detection signals acquired by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including one of the following:

[0019] The control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency range in which the impedance value changes by a greater than a preset threshold.

[0020] Alternatively, the control module is used to determine the phase of the pressure signal and the flow velocity signal at different oscillation frequencies, calculate the phase difference between the pressure signal and the flow velocity signal at different oscillation frequencies, and determine the target oscillation frequency range where the phase difference is zero or less than a preset phase difference threshold.

[0021] Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine a first target frequency range in which the impedance value changes by a greater than a preset threshold and a second target frequency range in which the phase difference is zero or less than a preset phase difference threshold, and to determine the target oscillation frequency range based on the first target frequency range and the second target frequency range;

[0022] Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency corresponding to the minimum impedance value or the target oscillation frequency range where the impedance value is less than a preset impedance value.

[0023] Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency range in which the impedance value is greater than a preset impedance value.

[0024] In one embodiment of this application, the detection module includes a pressure detection component;

[0025] The airflow detection signal includes: the pressure signal of the first airflow obtained by the pressure detection component;

[0026] The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including:

[0027] The control module is used to acquire the pressure signal of the airflow in the air supply duct through the pressure detection component, and determine the pressure signal amplitude of the pressure signal at different oscillation frequencies based on the pressure signal, and determine the target oscillation frequency corresponding to the maximum value of the pressure signal amplitude or the target oscillation frequency range where the pressure signal amplitude is greater than the preset amplitude.

[0028] In one embodiment of this application, the control module is configured to determine the target operating frequency and / or the target operating amplitude based on the target oscillation frequency range, including:

[0029] The control module is used to determine the target operating frequency based on the target oscillation frequency range, and to determine the target operating amplitude based on the target oscillation frequency range; or,

[0030] The control module is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal of the first airflow; or,

[0031] The control module is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal generated by the oscillation module to generate a second airflow.

[0032] In one embodiment of this application, the control module is used to determine the target operating amplitude based on the target oscillation frequency range, including:

[0033] Determine the target frequency parameters based on the target oscillation frequency range;

[0034] The target frequency parameter is compared with at least two frequency threshold conditions, wherein different frequency threshold conditions correspond to different levels of working amplitude;

[0035] Determine the target frequency threshold condition that the target frequency parameter meets, and take the working amplitude corresponding to the level of the target frequency threshold condition as the target working amplitude.

[0036] In one embodiment of this application, the control module is used to determine the target operating amplitude based on the target oscillation frequency range, including:

[0037] Determine the target frequency parameters based on the target oscillation frequency range;

[0038] If the target frequency parameter is greater than the first frequency threshold, the target working amplitude is determined to be the first amplitude;

[0039] If the target frequency parameter is less than the second frequency threshold, the target working amplitude is determined to be the second amplitude;

[0040] Wherein, the second frequency threshold is less than or equal to the first frequency threshold, and the second amplitude is greater than the first amplitude.

[0041] In one embodiment of this application, the amplitude of the first airflow is a third amplitude; wherein,

[0042] The third amplitude is less than or equal to the first amplitude;

[0043] Alternatively, the third amplitude may be greater than the first amplitude and less than the second amplitude.

[0044] In one embodiment of this application, the control module is used to determine a target operating frequency based on the target oscillation frequency range, including one of the following:

[0045] The control module is used to select one of the target oscillation frequency ranges as the target operating frequency;

[0046] Alternatively, the control module may perform statistical calculations on the target oscillation frequency range to obtain the target operating frequency.

[0047] In one embodiment of this application, the control module determines the target operating frequency based on the airflow detection signal generated by the oscillation module to generate the second airflow, including:

[0048] The oscillation module is controlled to output an oscillating airflow with an oscillation frequency equal to the initial frequency;

[0049] The detection module acquires the airflow detection signal of the oscillating airflow and determines whether the current oscillation frequency of the oscillating airflow is the resonance frequency based on the airflow detection signal.

[0050] If the current oscillation frequency of the oscillating airflow is a non-resonant frequency, the oscillation module is controlled to adjust the oscillation frequency of the oscillating airflow, and the process returns to the step of obtaining the airflow detection signal through the detection module.

[0051] When the current oscillation frequency of the oscillating airflow is the resonant frequency, the resonant frequency is used as the target operating frequency.

[0052] In one embodiment of this application, the control module is used to acquire the airflow detection signal of the oscillating airflow through the detection module, and determine whether the current oscillation frequency of the oscillating airflow is a resonant frequency based on the airflow detection signal, including one of the following:

[0053] The detection module includes a flow velocity detection component and a pressure detection component. The control module is also used to acquire the flow velocity signal of the oscillating airflow through the flow velocity detection component and the pressure signal of the oscillating airflow through the pressure detection component, calculate the phase difference between the pressure signal and the flow velocity signal, and determine that the current oscillation frequency is the resonance frequency when the phase difference is zero or less than a preset phase difference threshold.

[0054] The detection module includes a flow rate detection component and a pressure detection component. The control module is also used to acquire the flow rate signal of the oscillating airflow through the flow rate detection component and the pressure signal of the oscillating airflow through the pressure detection component, and to calculate the impedance value of the respiratory system based on the flow rate signal and the pressure signal. When the impedance value is less than a preset impedance value or is the minimum value compared with the historical impedance value, the current oscillation frequency is determined to be the resonant frequency.

[0055] Alternatively, the detection module includes a pressure detection component, and the control module is further configured to acquire the pressure signal of the oscillating airflow through the pressure detection component, determine the pressure signal amplitude of the pressure signal, and determine that the current oscillation frequency is the resonance frequency when the pressure signal amplitude is greater than a preset amplitude or is the maximum value compared with the historical pressure signal amplitude.

[0056] In one embodiment of this application, the control module is used to control the oscillation module to adjust the oscillation frequency of the oscillating airflow when the current oscillation frequency of the oscillating airflow is a non-resonant frequency, including one of the following:

[0057] The control module is used to determine the frequency adjustment increment based on the phase difference, the impedance value, or the magnitude of the pressure signal amplitude when the current oscillation frequency of the oscillating airflow is a non-resonant frequency, and to control the oscillation module to increase or decrease the frequency of the oscillating airflow based on the frequency adjustment increment.

[0058] Alternatively, the control module is used to control the oscillation module to increase or decrease the frequency of the oscillating airflow according to a preset frequency adjustment step size when the current oscillation frequency of the oscillating airflow is a non-resonant frequency.

[0059] In one embodiment of this application, the control module is configured to determine the target operating frequency based on the airflow detection signal of the first airflow, including one of the following:

[0060] The control module is used to determine the impedance value of the respiratory system under different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency corresponding to the minimum impedance value or the target operating frequency where the impedance value is less than a preset impedance value.

[0061] Alternatively, the control module is used to determine the phase of the pressure signal and the flow velocity signal at different oscillation frequencies of the first airflow, calculate the phase difference between the pressure signal and the flow velocity signal, and determine the target operating frequency where the phase difference is zero or less than a preset phase difference threshold.

[0062] Alternatively, the control module is used to determine the pressure signal amplitude of the pressure signal at different oscillation frequencies of the first airflow based on the pressure signal, and to determine the operating frequency corresponding to the maximum value of the pressure signal amplitude or the target operating frequency where the pressure signal amplitude is greater than a preset amplitude.

[0063] Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency where the impedance value changes by a greater than a preset threshold.

[0064] Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies of the first airflow and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine a first operating frequency where the impedance value change amplitude is greater than a preset threshold and a second operating frequency where the phase difference is zero or less than a preset phase difference threshold, and to determine the target operating frequency based on the first operating frequency and the second operating frequency.

[0065] In one embodiment of this application, determining the target working amplitude based on the target oscillation frequency range includes determining the target position of sputum in a plurality of preset positions in the respiratory system based on the target oscillation frequency range, and determining the target working amplitude based on the target position of sputum in the respiratory system.

[0066] In one embodiment of this application, the control module is configured to determine airflow characteristics at different oscillation frequencies based on airflow detection signals acquired by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions within the different oscillation frequencies, including:

[0067] The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine whether there is sputum in the respiratory system based on the airflow characteristics.

[0068] If the airflow characteristics meet the target oscillation frequency range within different oscillation frequencies, it is determined that sputum is present, and the target working frequency and / or target working amplitude are determined according to the target oscillation frequency range.

[0069] If no airflow characteristic meets the preset conditions at different oscillation frequencies, it is determined that there is no sputum, and the oscillation module is controlled to stop generating the first airflow.

[0070] In one embodiment of this application, the sputum expectoration device further includes a display, and the control module is further configured to control the display to show the position of sputum in the respiratory system according to the target oscillation frequency range.

[0071] In one embodiment of this application, the display shows a UI interface simulating the main airway and bronchial airways of the respiratory system. The control module determines the position of sputum in the respiratory system according to the target oscillation frequency range, and marks the position of sputum in the simulated main airway or simulated bronchial airway in the UI interface according to the position of sputum in the respiratory system.

[0072] In one embodiment of this application, the sputum expectoration device further includes a prompting module and a human-computer interaction module;

[0073] The control module, after outputting the target operating frequency and / or the target operating amplitude, includes:

[0074] The control module is used to output the target operating frequency and / or the target operating amplitude through the prompting module;

[0075] The control module is also used to receive user adjustments to the target operating frequency and / or the target operating amplitude through the human-computer interaction module, and to control the oscillation module to generate an oscillating airflow to promote the patient's expectoration at the adjusted target operating frequency and / or target operating amplitude.

[0076] In one embodiment of this application, the control module is further configured to monitor the airflow detection signal of the oscillating airflow through the detection module and determine the sputum position parameters based on the airflow detection signal;

[0077] The control module is further configured to control the oscillation module to stop generating the oscillating airflow when the sputum position parameter indicates a change in the sputum in the respiratory system or when the sputum disappears; or...

[0078] The control module is also used to control the prompting device to issue a suctioning prompt to the user when the sputum position parameter indicates a change in the sputum in the respiratory system.

[0079] In one embodiment, the flow velocity signal is obtained by extracting frequency information from the raw flow velocity signal acquired by the flow velocity detection component;

[0080] The pressure signal is obtained by extracting frequency information from the raw pressure signal acquired through the pressure detection component.

[0081] In one embodiment of this application, the oscillation module includes an oscillation gas source, which is connected to the gas supply channel;

[0082] Alternatively, the oscillation module includes an air proportional valve and an oxygen proportional valve disposed on the air supply duct, the air source includes an air source and an oxygen source, the air source is connected to the breathing duct through the air proportional valve, the oxygen source is connected to the breathing duct through the oxygen proportional valve, and the control module sends oscillation signals to the air proportional valve and the oxygen proportional valve to cause the air proportional valve and the oxygen proportional valve to oscillate and generate the first airflow and the oscillating airflow;

[0083] Alternatively, the oscillation module includes an inhalation valve disposed on the air supply duct, the air source being connected to the breathing duct through the inhalation valve, and the control module causing the inhalation valve to oscillate by sending an oscillation signal to the inhalation valve to generate the first airflow and the oscillating airflow.

[0084] In one embodiment of this application, the detection module is disposed on the breathing tubing.

[0085] Alternatively, the breathing tubing includes a connection end for connecting to the air source, and the detection module is disposed on the air supply tubing between the oscillating air source and the connection end;

[0086] Alternatively, the breathing tubing includes a connection end for connecting to the gas source, and the detection module is disposed on the gas supply tubing between the air proportional valve and / or the oxygen proportional valve and the connection end;

[0087] Alternatively, the breathing tubing may include a connection end for connecting to the air source, and the detection module may be disposed on the air supply tubing between the inhalation valve and the connection end.

[0088] On the other hand, embodiments of this application provide a sputum detection device, including:

[0089] Breathing tubing is used to connect to a patient's respiratory system;

[0090] An air source is connected to the breathing tube to form an air supply channel communicating with the respiratory system; the air source is used to provide airflow to the air supply channel.

[0091] An oscillation module, connected to or installed on the air supply duct, is used to cause the airflow output from the air source to oscillate.

[0092] A detection module is installed on the air supply duct to detect the airflow in the air supply duct and obtain an airflow detection signal.

[0093] A control module, connected to the oscillation module and the detection module, is used for:

[0094] The oscillation module is controlled to generate first airflows with different oscillation frequencies;

[0095] Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined;

[0096] The location of sputum in the respiratory system is determined based on the target oscillation frequency range, and the display is controlled to show the location of sputum in the respiratory system.

[0097] In one embodiment of this application, the control module is further configured to control the display to show a UI interface simulating the main airway and the bronchial airway of the respiratory system. The control module marks the position of the sputum in the simulated main airway or simulated bronchial airway in the UI interface according to the position of the sputum in the respiratory system.

[0098] On the other hand, embodiments of this application provide a ventilator that includes the sputum expectoration device provided in any of the above embodiments, or includes the sputum detection device provided in any of the above embodiments.

[0099] On the other hand, this application provides a sputum expectoration method applied to a ventilator. The ventilator includes a gas source, a breathing tubing, an oscillation module, and a detection module. The gas source is connected to the breathing tubing to form a supply airway communicating with the respiratory system. The oscillation module is connected to or disposed on the supply airway to cause the airflow output by the gas source to oscillate, forming an oscillating airflow. The detection module is disposed on the supply airway. The method includes:

[0100] The oscillation module is controlled to generate first airflows with different oscillation frequencies;

[0101] The airflow detection signal in the air supply duct is obtained through the detection module;

[0102] Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined;

[0103] Determine the target operating frequency and / or target operating amplitude based on the target oscillation frequency range;

[0104] The oscillation module is controlled to generate an oscillating airflow to facilitate expectoration of the patient based on the target operating frequency and / or the target operating amplitude; or, the target operating frequency and / or the target operating amplitude is output to suggest to the user that the oscillation module is controlled to generate an oscillating airflow to facilitate expectoration of the patient based on the target operating frequency and / or the target operating amplitude.

[0105] On the other hand, this application provides a sputum detection method applied to a ventilator. The ventilator includes a gas source, a breathing tubing, an oscillation module, a detection module, and a display. The gas source is connected to the breathing tubing to form a supply airway communicating with the respiratory system. The oscillation module is connected to or disposed on the supply airway to cause the airflow output by the gas source to oscillate, forming an oscillating airflow. The detection module is disposed on the supply airway. The method includes:

[0106] The oscillation module is controlled to generate first airflows with different oscillation frequencies;

[0107] Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined;

[0108] The location of sputum in the respiratory system is determined based on the target oscillation frequency range, and the display is controlled to show the location of sputum in the respiratory system.

[0109] On the other hand, embodiments of this application provide a control device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it executes the sputum expectoration method provided in any of the above embodiments, or executes the sputum detection method provided in any of the above embodiments.

[0110] The embodiments of this application include at least the following beneficial effects:

[0111] In some embodiments of this application, precise control of the oscillating airflow output by the oscillation module via a control module can effectively promote sputum expectoration in patients. Specifically, the oscillation module is controlled to generate first airflows with different oscillation frequencies from the air source. Airflow detection signals acquired by a detection module determine the airflow characteristics at different oscillation frequencies. These characteristics reflect the response of the patient's respiratory system to the first airflows at different frequencies. Based on this, a target oscillation frequency range is determined within the different oscillation frequencies, ensuring the airflow characteristics meet preset conditions. A target operating frequency and / or target operating amplitude are then determined based on this target oscillation frequency range. The oscillation module is then controlled to generate an oscillating airflow with the target operating frequency and / or target operating amplitude to promote sputum expectoration. Since the target oscillation frequency range reflects the state of sputum in the respiratory system, the target operating frequency and / or target operating amplitude of the oscillating airflow determined by this range can automatically match the patient's respiratory system, ensuring the oscillation characteristics of the airflow suit the patient's needs. This not only improves the efficiency and effectiveness of sputum expectoration but also significantly enhances the patient's treatment experience and reduces the workload of medical staff.

[0112] In some embodiments of this application, an oscillation module is controlled to generate first airflows with different oscillation frequencies from the air supply. Airflow detection signals acquired by a detection module determine the airflow characteristics at different oscillation frequencies. These airflow characteristics reflect the patient's respiratory system's response to the first airflows at different oscillation frequencies. Based on this, a target oscillation frequency range is determined where the airflow characteristics meet preset conditions within the different oscillation frequencies. The location of sputum in the respiratory system is then determined based on the target oscillation frequency range and displayed on a monitor. In this embodiment, since the target oscillation frequency range reflects the state of sputum in the respiratory system, its location can be further determined, providing medical personnel with more precise treatment guidance. This allows medical personnel to adjust their expectoration strategies based on the sputum location data displayed on the monitor. This embodiment reduces reliance on medical personnel's experience, making the expectoration process more standardized and efficient. Attached Figure Description

[0113] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0114] Figure 1 This is a schematic diagram of the structure of a sputum expectoration device provided in an embodiment of this application;

[0115] Figure 2 A schematic diagram illustrating the superimposed oscillations of a valve at different opening degrees according to an embodiment of this application;

[0116] Figure 3 This is another structural schematic diagram of the sputum expectoration device provided in the embodiments of this application;

[0117] Figure 4 A flowchart illustrating a method for identifying resonant frequencies provided in this application embodiment;

[0118] Figure 5 A waveform diagram showing the phase difference between the flow velocity signal and the pressure signal when there is zero, provided in an embodiment of this application.

[0119] Figure 6 A waveform diagram showing the non-zero phase difference between the flow velocity signal and the pressure signal provided in this embodiment of the application;

[0120] Figure 7 This is a schematic diagram of the structure of a sputum detection device provided in an embodiment of this application;

[0121] Figure 8 A flowchart of a sputum expectoration method provided in an embodiment of this application;

[0122] Figure 9 A flowchart of another sputum expectoration method provided in an embodiment of this application. Detailed Implementation

[0123] The present application will be further described below with reference to the accompanying drawings and specific embodiments. The described embodiments should not be considered as limitations on the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0124] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0125] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0126] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatuses.

[0127] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0128] It should be understood that in the description of the embodiments of this application, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0129] In the medical field, the worsening of lung diseases such as pulmonary edema, bronchiectasis, lung infections, and lung cancer is often closely related to the accumulation and difficulty in clearing sputum. Sputum accumulation not only increases the risk of infection but also severely impacts patients' respiratory function and quality of life. Especially during the postoperative recovery period, timely sputum clearance is crucial for rapid recovery. However, the efficiency and effectiveness of sputum clearance are often limited by various factors, including sputum viscosity, airway patency, and the patient's own respiratory capacity.

[0130] To promote expectoration, current medical procedures effectively loosen sputum by delivering pulses of pressurized gas to the lungs. However, the effectiveness of this method largely depends on the settings of parameters such as the gas vibration frequency and amplitude. These parameters vary depending on the patient or the patient's clinical condition, and currently, setting these parameters relies heavily on the experience of healthcare professionals and repeated trials. This not only increases the workload of healthcare workers but also affects the accuracy and effectiveness of expectoration therapy, leading to a poor patient experience.

[0131] In this regard, embodiments of this application provide a sputum expectoration device, a sputum detection device, a ventilator, and a sputum expectoration method that can provide patients with a suitable oscillating airflow to promote sputum expectoration and improve the accuracy and effectiveness of sputum expectoration treatment.

[0132] On the one hand, refer to Figure 1 This application provides a sputum clearance device 100, which can be part of a ventilator or an independent external device used in conjunction with a ventilator. For example, an oscillation module 400 and a detection module 500 are provided on the breathing tubing 300 between the ventilator and the patient. A control module 600 is connected to the oscillation module 400 and the detection module 500. The control module 600, independent of the ventilator, is used to: control the oscillation module 400; detect the airflow in the breathing tubing 300 through the detection module 500 to obtain an airflow detection signal; further, determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module 500; determine the target oscillation frequency range in which the airflow characteristics meet preset conditions in different oscillation frequencies; and determine the target operating frequency and / or target operating amplitude of the oscillation module 400 based on the target oscillation frequency range.

[0133] In one embodiment, the control module 600 is used to control the oscillation module 400 to generate an oscillating airflow to facilitate expectoration in the patient, based on a target operating frequency and / or a target operating amplitude.

[0134] In one embodiment, the control module is configured to output the target operating frequency and / or the target operating amplitude to suggest to the user that the oscillation module generates an oscillating airflow to facilitate expectoration in the patient at the target operating frequency and / or the target operating amplitude.

[0135] In another embodiment, the sputum expectoration device 100 is used independently as a device for expectoration of a patient.

[0136] In another embodiment, the sputum expectoration device 100 may also be built into a ventilator, for example, see [link to relevant documentation]. Figure 1 As shown, the sputum clearance device 100 includes an air source 200 and a breathing tube 300. One end of the breathing tube 300 is connected to the air source 200, and the other end is connected to the patient's respiratory system. For example, it can be connected to a breathing mask used by the patient, or to the patient's endotracheal tube, which is placed in the airway (e.g., trachea) of the patient's respiratory system. In another embodiment, the breathing tube 300 can also be directly placed in the airway of the patient's respiratory system as an intubation tube. The air source 200 is connected to the patient's respiratory system through the breathing tube 300 to form an air supply airway. In other words, the air supply airway includes at least an air source 200 and a breathing tube 300. The air supply airway is used to provide airflow to the patient's respiratory system. In one embodiment, the air supply airway may also include other parts besides the air source 200 and the breathing tube 300. For example, the breathing tube 300 is connected to the patient's intubation tube, and air is supplied to the patient's respiratory system through the intubation tube. In this case, the intubation tube is also part of the air supply airway. In addition, for example, the breathing tube 300 is connected to the patient's mask, and air is supplied to the patient's trachea through the mask. The airflow enters the respiratory system through the patient's mouth / nose and trachea. In this case, the patient's mouth / nose and trachea are also part of the air supply airway.

[0137] The sputum expectoration device 100 also includes an oscillation module 400, a detection module 500, and a control module 600. The oscillation module 400 is connected to or installed on the air supply duct and is used to cause the airflow provided by the air source 200 to oscillate. As above, the air supply duct includes at least the air source 200, the breathing tube 300, and the pipeline through which the airflow provided by the air source flows.

[0138] In one embodiment, the oscillation module 400 can be positioned at any location in the air supply duct as needed, such as on the air source 200, on the breathing tube 300, or at other locations in the air supply duct, such as on the intubation tube, as long as it can cause the airflow in the air supply duct to oscillate. In one embodiment, the airflow can first pass through the oscillation module 400 before being output as oscillating airflow. For example, the oscillation module 400 can be a valve, and the oscillating airflow can be output by repeatedly controlling the opening of the valve. In this way, the airflow is processed by the oscillation module 400 before being output to the air supply duct. In another embodiment, the oscillation module 400 positioned on the air supply duct can also be a vibrating component, such as a piston or vibrating plate driven by an electric motor, or an ultrasonic oscillation component. These vibrating components can oscillate the airflow flowing through the air supply duct. For example, the vibrating component can be positioned outside the breathing tube 300. In another embodiment, the oscillation module 400 includes an oscillating gas source connected to the air supply channel. The oscillating gas source can output an airflow with varying amplitude, so that the airflow supplied by the gas source 200 can be superimposed with the airflow output by the oscillating gas source in the air supply channel, thus generating an oscillating airflow. The oscillating gas source can also be connected to different locations on the air supply channel as needed, such as to the gas source 200 or the breathing tubing 300. As mentioned above, it can also be connected to other locations on the air supply channel besides the gas source 200 and the breathing tubing 300, such as connecting to the patient's endotracheal tube or breathing mask.

[0139] In one embodiment, to enable the ventilator 1000 to support the patient's respiratory system, valves for controlling ventilation are installed on the air supply duct, such as inspiratory valves, exhalation valves, expiratory valves, and proportional valves for mixing gases. Any valve on the air supply duct can also serve as a vibration module to generate oscillating airflow. For example, in one embodiment, an oscillation signal can be superimposed or transmitted on the valve's opening signal, so that the oscillation signal is superimposed on the valve during its normal opening process. See, for example... Figure 2 The valve shown has two states: a first opening degree and a second opening degree. By superimposing an oscillation signal on the valve's opening degree signal, the valve can be made to oscillate based on the first opening degree and the second opening degree, thereby generating an oscillating airflow.

[0140] It should be noted that in any of the above embodiments, multiple oscillation modules 400 may be provided, or multiple components that generate oscillating airflow may be provided in the oscillation module 400 (e.g., multiple oscillating air sources).

[0141] In one embodiment, see Figure 3As shown, the gas source 200 includes an air source 210 and an oxygen source 220. The air source 210 is connected to the breathing tubing 300 through an air proportional valve 410, and the oxygen source 220 is connected to the breathing tubing 300 through an oxygen proportional valve 420. The air provided by the air source 210 and the oxygen provided by the oxygen source 220 are mixed in the breathing tubing 300 and then output to the patient's respiratory system through the air supply channel to provide mechanical ventilation support for the patient. The oxygen content of the gas supplied to the patient's respiratory system can be adjusted by controlling the opening of the air proportional valve 410 and the oxygen proportional valve 420. In addition, the air proportional valve 410 and / or the oxygen proportional valve 420 can also be used as a vibration module 400 to generate an oscillating airflow by oscillating the airflow flowing through the air proportional valve 410 and / or the oxygen proportional valve 420.

[0142] In one embodiment, see Figure 3 The oscillation module 400 includes an air proportional valve 410 and an oxygen proportional valve 420 disposed on the air supply duct. The air source includes an air source 210 and an oxygen source 220. The control module 600 sends oscillation signals to the air proportional valve 410 and the oxygen proportional valve 420 to cause the air proportional valve 410 and the oxygen proportional valve 420 to oscillate and generate a first airflow and an oscillating airflow.

[0143] In one embodiment, the oscillation module 400 includes an intake valve and an oxygen proportional valve 420 disposed on the air supply duct. A turbine is disposed between the oxygen proportional valve 420 and the intake valve. The air source includes an oxygen source 220. The control module 600 generates a first airflow and an oscillating airflow by sending oscillation signals to the intake valve and the oxygen proportional valve 420; or, the control module 600 generates a first airflow and an oscillating airflow by sending oscillation signals to the turbine and the oxygen proportional valve 420; or, the control module 600 generates a first airflow and an oscillating airflow by sending oscillation signals to the intake valve, the oxygen proportional valve 420, and the turbine.

[0144] In one embodiment, the oscillation module 400 includes an oxygen proportional valve 420 disposed on the air supply duct and a turbine for mixing the airflow. The air source includes an oxygen source 220. The control module 600 generates a first airflow and an oscillating airflow by sending an oscillation signal to the turbine and the oxygen proportional valve 420.

[0145] In one embodiment, the detection module 500 is disposed on the breathing tubing 300; or the breathing tubing 300 includes a connection end for connecting to a gas source, and the detection module 500 is disposed on the gas supply pipe between the oscillating gas source and the connection end; or the breathing tubing 300 includes a connection end for connecting to a gas source, and the detection module 500 is disposed on the gas supply pipe between the air proportioning valve 410 and / or the oxygen proportioning valve 420 and the connection end; or the breathing tubing 300 includes a connection end for connecting to a gas source, and the detection module 500 is disposed on the gas supply pipe between the inhalation valve and the connection end.

[0146] In one embodiment, the detection module 500 includes a flow rate detection component and a pressure detection component;

[0147] The airflow detection signal includes: the flow velocity signal of the first airflow obtained by the flow velocity detection component, and the pressure signal of the first airflow obtained by the pressure detection component.

[0148] In one embodiment, the flow rate detection component may be a flow meter or a gas flow sensor for measuring and recording the gas flow rate.

[0149] In one embodiment, the pressure detection component may be a pressure sensor for measuring and recording the pressure of the gas.

[0150] In one embodiment, the flow velocity signal is obtained by extracting frequency information from the raw flow velocity signal acquired by the flow velocity detection component;

[0151] The pressure signal is obtained by extracting the frequency information from the raw pressure signal acquired through the pressure detection component.

[0152] Understandably, since ventilators have their own respiratory cycles, it is necessary to eliminate the influence of the respiratory cycle.

[0153] In one embodiment, the control module 600 is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal acquired by the detection module 500, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including one of the following:

[0154] Understandably, these preset conditions are designed to ensure that the oscillating airflow can effectively promote expectoration without causing discomfort or harm to the patient.

[0155] Firstly, the control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and flow rate signal, and to determine the target oscillation frequency range in which the impedance value change amplitude is greater than a preset threshold.

[0156] Understandably, the oscillation module 400 generates a first airflow with different oscillation frequencies, such as 2-20Hz. This first airflow at different frequencies is injected into the lungs. The detection module 500 detects the airflow within the air supply duct, obtaining airflow detection signals, namely, the airflow pressure signal and flow velocity signal. The control module 600 determines the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and flow velocity signal. When sputum is present in the airway, there will be significant resistance at that location, causing a substantial change in impedance value. Based on this change, sputum accumulation can be identified. Furthermore, at each frequency, the relationship between the impedance value and the pressure and flow velocity signals conforms to the following formula:

[0157]

[0158] As can be seen from the above formula, Z(f) represents the impedance value at a certain oscillation frequency, P(f) represents the pressure value at a certain oscillation frequency, and V(f) represents the flow velocity value at a certain oscillation frequency. When the impedance change value ΔZ(f), i.e. the impedance change amplitude, is greater than the preset threshold Z1, the corresponding frequency range f1 to f2 is the target oscillation frequency range. The target oscillation frequency within this target oscillation frequency range is equal to or close to the resonance frequency. Furthermore, by further calculating the target oscillation frequency within the target oscillation frequency range, the target working frequency and target working amplitude are obtained. Compared with the scheme of directly using these target oscillation frequencies as the target working frequency of the subsequent oscillation airflow generated by the oscillation module 400, it is more likely to enable the subsequent oscillation airflow generated by the oscillation module 400 to achieve a more accurate sputum expectoration effect and maximize the protection of the patient's lungs.

[0159] Secondly, the control module 600 is used to determine the phase of the pressure signal and the flow velocity signal at different oscillation frequencies, calculate the phase difference between the pressure signal and the flow velocity signal at different oscillation frequencies, and determine the target oscillation frequency range where the phase difference is zero or less than the preset phase difference threshold.

[0160] Understandably, by continuously calculating the phase difference between pressure and flow signals at different oscillation frequencies, and determining the target oscillation frequency range where the phase difference is zero or less than a preset phase difference threshold, the target oscillation frequency within this range is equal to or close to the resonance frequency. Furthermore, by further calculating the target oscillation frequency within the target oscillation frequency range to obtain the target operating frequency and target operating amplitude, compared to directly using these target oscillation frequencies as the target operating frequency of the subsequent oscillating airflow generated by the oscillation module 400, it is more effective in enabling the subsequent oscillating airflow generated by the oscillation module 400 to achieve a more precise sputum expectoration effect and maximize the protection of the patient's lungs.

[0161] Thirdly, the control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine a first target frequency range where the impedance value change amplitude is greater than a preset threshold and a second target frequency range where the phase difference is zero or less than a preset phase difference threshold, and to determine the target oscillation frequency range based on the first target frequency range and the second target frequency range.

[0162] It should be noted that, under normal circumstances, the number of first target frequencies within a first target frequency range where the impedance change of the respiratory system at different oscillation frequencies is greater than a preset threshold, determined based on pressure and flow signals, includes at least one. Similarly, the number of second target frequencies within a second target frequency range where the phase difference is zero or less than a preset phase difference threshold, determined based on pressure and flow signals, includes at least one. Furthermore, the values ​​of the first and second target frequencies are similar and close to the resonant frequency. There may be some overlap between datasets composed of multiple first target frequencies and datasets composed of multiple second target frequencies. This can be addressed by statistically calculating the average value of all first target frequencies within the first target frequency range and all second target frequencies within the second target frequency range, and using this average value as the target oscillation frequency. Alternatively, the target oscillation frequency can be determined by averaging the two largest and smallest data values ​​selected from the datasets within the first and second target frequency ranges.

[0163] Understandably, by comprehensively considering the impedance value change amplitude and phase difference information, the first target frequency range and the second target frequency range are determined. The most suitable frequency is selected from the dataset of the first target frequency range and the second target frequency range as the target oscillation frequency, which can effectively improve the accuracy of subsequent determination of the target working frequency or target working amplitude, thereby generating an oscillating airflow that can better promote the patient's expectoration.

[0164] Fourthly, the control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and flow rate signal, and to determine the target oscillation frequency corresponding to the minimum impedance value or the target oscillation frequency range where the impedance value is less than the preset impedance value.

[0165] It should be noted that when sputum appears in the airway, the calculated impedance value will change significantly and decrease. The target oscillation frequency corresponding to the minimum impedance value is close to the resonant frequency. The target oscillation frequency within the target oscillation frequency range with an impedance value less than the preset impedance value is also close to the resonant frequency. Furthermore, by further calculating the target oscillation frequency within the target oscillation frequency range, the target operating frequency and target operating amplitude are obtained. Compared with the scheme of directly using these target oscillation frequencies as the target operating frequency of the subsequent oscillating airflow generated by the oscillation module 400, it is more likely to enable the subsequent oscillating airflow generated by the oscillation module 400 to achieve a more accurate sputum expectoration effect and protect the patient's lungs to the greatest extent.

[0166] Fifth: The control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and flow rate signal, and to determine the target oscillation frequency range where the impedance value is greater than the preset impedance value.

[0167] In one embodiment, the detection module 500 includes a pressure detection component;

[0168] The airflow detection signal includes: the pressure signal of the first airflow acquired through the pressure detection component;

[0169] It should be noted that the pressure signal is obtained by extracting the frequency information from the raw pressure signal acquired through the pressure detection component.

[0170] In one embodiment, the pressure detection component may be a pressure sensor for measuring and recording the pressure of the gas.

[0171] The control module 600 is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal acquired by the detection module 500, and to determine the target oscillation frequency range in which the airflow characteristics meet preset conditions, including:

[0172] The control module 600 is used to acquire the pressure signal of the airflow in the air supply duct through the pressure detection component, determine the pressure signal amplitude of the pressure signal at different oscillation frequencies based on the pressure signal, and determine the target oscillation frequency corresponding to the maximum value of the pressure signal amplitude or the target oscillation frequency range where the pressure signal amplitude is greater than the preset amplitude.

[0173] It should be noted that the oscillation module 400 generates first airflow signals with different oscillation frequencies but the same peak value. If resonance occurs, the amplitude of the pressure signal corresponding to the detected oscillation frequency is the largest compared to the amplitude of the pressure signal corresponding to other oscillation frequencies. Based on this principle, the control module 600 acquires the pressure signal of the airflow in the air supply duct, determines the amplitude of the pressure signal at different oscillation frequencies, and determines the target oscillation frequency corresponding to the maximum amplitude of the pressure signal or the target oscillation frequency range where the pressure signal amplitude is greater than the preset amplitude. The target oscillation frequency determined within this target oscillation frequency range will be equal to or close to the resonance frequency. Furthermore, by further calculating the target oscillation frequencies within the target oscillation frequency range, the target working frequency and target working amplitude are obtained. Compared to directly using these target oscillation frequencies as the target working frequency of the subsequent oscillation airflow generated by the oscillation module 400, this method can enable the subsequent oscillation airflow generated by the oscillation module 400 to achieve a more accurate sputum expectoration effect and maximize the protection of the patient's lungs.

[0174] In addition, compared with the technical method of obtaining pressure signals and flow velocity signals and then calculating impedance or phase difference to determine the target oscillation frequency, the method of determining the target oscillation frequency corresponding to the maximum value of the pressure signal amplitude or the target oscillation frequency range where the pressure signal amplitude is greater than the preset amplitude only relies on the pressure detection component to obtain the airflow pressure signal, without the need for an additional flow velocity sensor. This simplifies the hardware composition and signal processing flow of the system, and reduces the manufacturing cost and maintenance difficulty of the equipment.

[0175] In one embodiment, the control module 600 is used to determine the target operating frequency and / or the target operating amplitude based on the target oscillation frequency range, including one of the following:

[0176] Firstly, the control module 600 is used to determine the target operating frequency based on the target oscillation frequency range, and to determine the target operating amplitude based on the target oscillation frequency range;

[0177] Secondly, the control module 600 is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal of the first airflow.

[0178] Thirdly, the control module 600 is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal generated by the second airflow through the oscillation module 400.

[0179] In one embodiment, the control module 600 is used to determine the target operating amplitude based on the target oscillation frequency range, including:

[0180] First, determine the target frequency parameters based on the target oscillation frequency range;

[0181] Secondly, the target frequency parameter is compared with at least two frequency threshold conditions, where different frequency threshold conditions correspond to different levels of working amplitude;

[0182] Finally, the target frequency threshold conditions that the target frequency parameters meet are determined, and the working amplitude corresponding to the level of the target frequency threshold conditions is taken as the target working amplitude.

[0183] It should be noted that when the target frequency parameter is less than the third frequency threshold, the target working amplitude is determined to be the fourth amplitude; when the target frequency parameter is less than the fourth frequency threshold, the target working amplitude is determined to be the fifth amplitude, wherein the fifth amplitude is greater than the fourth amplitude, and the fourth frequency threshold is less than or equal to the third frequency threshold.

[0184] Furthermore, the lungs include the main trachea and bronchi. The bronchi extend downwards into multiple levels of bronchi, such as the first bronchus, the second bronchus, etc. Based on the principle that low-frequency signals travel farther and high-frequency signals travel shorter, the smaller the frequency threshold corresponding to the target frequency parameter, the farther the sputum is from the main trachea, and the higher the required target working amplitude level. Higher-level target working amplitudes have larger amplitudes to ensure effective sputum expectoration. When the target frequency parameter is less than the third frequency threshold, for example, 4Hz, the first airflow signal corresponding to the airflow characteristics that meet the preset conditions is the first low-frequency signal, indicating that the sputum is located in the first bronchus, which is farther from the main bronchus. Because the sputum... The sputum is located in the first bronchus, which is relatively narrow and deep. The working amplitude of the oscillating airflow is significantly attenuated. To effectively ensure the oscillating airflow reaches the narrow bronchus, the working amplitude can be appropriately increased, resulting in a larger fourth amplitude. When the target frequency parameter is less than the fourth frequency threshold (e.g., 3Hz), the first airflow signal, whose airflow characteristics meet preset conditions, is the second low-frequency signal. This indicates the sputum is located in the second bronchus, which is further away from the bronchus. The second bronchus is narrower and deeper, resulting in even greater attenuation of the working amplitude of the oscillating airflow. To effectively ensure the oscillating airflow reaches the narrow bronchus, the working amplitude can be appropriately increased, resulting in a larger fifth amplitude. It is understood that the lungs can be divided into multiple trachea. This application does not limit the number of "at least two frequency threshold conditions." Different tracheas correspond to different frequency thresholds. One frequency threshold condition can correspond to one level of trachea. This allows the target oscillation frequency range to be determined by the frequency thresholds corresponding to different tracheas, thereby determining the target frequency threshold condition. This allows the target working amplitude corresponding to the target frequency threshold condition to be determined by combining the working amplitudes corresponding to different frequency threshold conditions.

[0185] In one embodiment, the control module 600 is used to determine the target operating amplitude based on the target oscillation frequency range, including the following steps:

[0186] First, determine the target frequency parameters based on the target oscillation frequency range;

[0187] Secondly, if the target frequency parameter is greater than the first frequency threshold, the target working amplitude is determined to be the first amplitude;

[0188] Next, if the target frequency parameter is less than the second frequency threshold, the target working amplitude is determined to be the second amplitude;

[0189] It should be noted that the second frequency threshold is less than or equal to the first frequency threshold, and the second amplitude is greater than the first amplitude.

[0190] It should be noted that the lungs include the main trachea and bronchi. Based on the principle that low-frequency signals travel farther and high-frequency signals travel shorter, when the target frequency parameter is greater than the first frequency threshold, such as 20Hz, the first airflow signal corresponds to a high-frequency signal, indicating that the sputum is located in the main trachea. Since the sputum is located in the main trachea, the working amplitude of the oscillating airflow can be appropriately reduced, determined to be a smaller first amplitude, to effectively promote sputum expectoration while protecting the lungs to the greatest extent. When the target frequency parameter is less than the second frequency threshold, such as 5Hz, the first airflow signal corresponds to a low-frequency signal, indicating that the sputum is located in the bronchi. Since the sputum is located in the bronchi, which are relatively narrow, the working amplitude of the oscillating airflow is attenuated significantly. To effectively ensure that the oscillating airflow reaches the narrow bronchi, the working amplitude can be appropriately increased, determined to be a larger second amplitude, to guarantee the effectiveness of sputum expectoration.

[0191] Understandably, firstly, the control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies based on pressure and flow signals, and to determine the target oscillation frequency range where the impedance value change amplitude is greater than a preset threshold; or, the control module 600 is used to determine the impedance value of the respiratory system at different oscillation frequencies based on pressure and flow signals, and to determine the target oscillation frequency corresponding to the minimum impedance value or the target oscillation frequency range where the impedance value is less than a preset impedance value; secondly, a target frequency parameter is determined based on the target oscillation frequency range. When the target frequency parameter is greater than a first frequency threshold, such as 20Hz, its impedance value can reflect the impedance of the main airway. When the impedance value changes significantly, it can be confirmed that there is sputum in the main airway; when the target frequency parameter is less than a second frequency threshold, such as 5Hz, its impedance value can reflect the impedance of the bronchus. When the impedance value changes significantly, it can be confirmed that there is sputum in the bronchus; furthermore, based on the location of the sputum inside the lungs, in order to maximize lung protection while ensuring the effectiveness of sputum expectoration, the corresponding target working amplitude is determined.

[0192] In one embodiment, the amplitude of the first airflow is a third amplitude; wherein the third amplitude is less than or equal to the first amplitude; or, the third amplitude is greater than the first amplitude and less than the second amplitude.

[0193] It should be noted that the oscillation module 400 generates a first airflow at different oscillation frequencies. To avoid patient discomfort, the amplitude of the first airflow signal, as an oscillation signal, should be as small as possible. It can be adjusted to be less than or equal to the target working amplitude of sputum in the main airway, i.e., the third amplitude of the first amplitude; or it can be adjusted to be greater than the target working amplitude of sputum in the main airway, i.e., the first amplitude, but less than the target working amplitude of sputum in the bronchial airway, i.e., the third amplitude of the second amplitude. This avoids the detection module 500 being unable to properly detect the airflow in the supply airway and obtain an airflow detection signal due to the first airflow energy being too low and the signal being weak, thus improving the accuracy and effectiveness of the detection.

[0194] In one embodiment, the control module 600 is used to determine the target operating frequency based on the target oscillation frequency range, including one of the following:

[0195] Firstly, the control module 600 is used to select one frequency from the target oscillation frequency range as the target operating frequency;

[0196] It should be noted that the control module 600 is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module 500, and to determine the target oscillation frequency range in which the airflow characteristics meet the preset conditions. These target oscillation frequency ranges that meet the preset conditions are close to the values ​​of the resonant frequencies. The most stable target oscillation frequency that best meets the current working conditions is selected as the target working frequency. For example, the largest or smallest target oscillation frequency is selected as the target working frequency to ensure that the subsequent generation of oscillating airflow that can better promote the patient's expectoration is guaranteed.

[0197] Secondly, the control module 600 is used to perform statistical calculations on the target oscillation frequency range to obtain the target operating frequency.

[0198] It should be noted that the control module 600 can calculate the average value of the target oscillation frequency range and use the calculated data as the target operating frequency, thereby reducing the impact of fluctuations in a single target oscillation frequency on system stability.

[0199] In one embodiment, reference is made to Figure 4 The control module determines the target operating frequency based on the airflow detection signal generated by the oscillation module 400, including steps S1100-S1400:

[0200] Step S1100: Control the oscillation module 400 to output an oscillating airflow with an oscillation frequency equal to the initial frequency;

[0201] Step S1200: Obtain the airflow detection signal of the oscillating airflow through the detection module 500, and determine whether the current oscillation frequency of the oscillating airflow is the resonance frequency based on the airflow detection signal;

[0202] Step S1300: When the current oscillation frequency of the oscillating airflow is a non-resonant frequency, control the oscillation module 400 to adjust the oscillation frequency of the oscillating airflow, and return to the step of obtaining the airflow detection signal through the detection module 500.

[0203] Step S1400: When the current oscillation frequency of the oscillating airflow is the resonant frequency, the resonant frequency is used as the target operating frequency.

[0204] Preferably, the initial frequency is 2Hz or 30Hz, and the initial frequency can be appropriately adjusted according to the actual performance of the equipment and the actual condition of the patient.

[0205] Understandably, if, before determining the target operating frequency of the oscillating airflow, the target operating amplitude determined based on the target oscillation frequency of the first airflow is a larger second amplitude, and the sputum accumulation location is determined to be the bronchi of the lungs, based on multiple experiments, when the sputum accumulation location is the bronchi of the lungs, the corresponding resonant frequency is low. Therefore, the initial frequency of the oscillation frequency output by the control oscillation module 400 is a low-frequency oscillating airflow, such as 2Hz. The detection module 500 acquires the airflow detection signal of the oscillating airflow, and determines whether the current oscillation frequency of the oscillating airflow is the resonant frequency based on the airflow detection signal. Then, if the current oscillation frequency of the oscillating airflow is not the resonant frequency, the control oscillation module 400 increases the oscillation frequency of the oscillating airflow and returns to the step of acquiring the airflow detection signal through the detection module 500. If the corresponding resonant frequency is 10Hz, it is only necessary to iterate through the frequencies in the range of 2-10Hz to stop adjusting the frequency of the oscillating airflow; or If, before determining the target operating frequency of the oscillating airflow, the target operating amplitude is determined to be a smaller second amplitude based on the target oscillation frequency of the first airflow, and the sputum accumulation location is determined to be the main airway of the lungs, analysis of historical experimental data shows that when the sputum accumulation location is the main airway of the lungs, the corresponding resonant frequency is high-frequency. The initial frequency of the oscillation frequency output by the control oscillation module 400 is a high-frequency oscillating airflow, such as 30Hz. The airflow detection signal of the oscillating airflow is obtained through the detection module 500, and the current oscillation frequency of the oscillating airflow is determined based on the airflow detection signal. Then, if the current oscillation frequency of the oscillating airflow is not a resonant frequency, the control oscillation module 400 reduces the oscillation frequency of the oscillating airflow and returns to the step of obtaining the airflow detection signal through the detection module 500. If the corresponding resonant frequency is 20Hz, it is only necessary to iterate through the frequencies in the range of 30-20Hz to stop adjusting the frequency of the oscillating airflow.

[0206] Understandably, the target working amplitude of the oscillating airflow is determined based on the target oscillation frequency, and the initial frequency of the second airflow is determined to be high-frequency or low-frequency based on the target working amplitude. When the current oscillation frequency of the oscillating airflow is a non-resonant frequency, the control oscillation module 400 can increase or decrease the oscillation frequency of the oscillating airflow, find the resonant frequency more quickly, and improve the overall operating efficiency of the device.

[0207] It should be noted that the detection module 500 acquires the airflow detection signal of the oscillating airflow and determines whether the current oscillation frequency of the oscillating airflow is the resonant frequency based on the airflow detection signal, thus realizing real-time monitoring and feedback of the device. Next, when the current oscillation frequency of the oscillating airflow is not the resonant frequency, the oscillation module 400 is controlled to adjust the oscillation frequency of the oscillating airflow, and the process returns to the step of acquiring the airflow detection signal through the detection module 500. Through dynamic adjustment, the frequency of the oscillating airflow is continuously brought closer to the optimal operating frequency, i.e., the resonant frequency, thereby improving the system's operating efficiency. Finally, when the current oscillation frequency of the oscillating airflow is the resonant frequency, the resonant frequency is used as the target operating frequency. Operating at the resonant frequency results in the highest energy conversion efficiency of the oscillating airflow, enabling the subsequent oscillating airflow generated by the oscillation module 400 to achieve a more precise sputum expectoration effect and maximize the protection of the patient's lungs.

[0208] In one embodiment, the control module 600 is used to acquire the airflow detection signal of the oscillating airflow through the detection module 500, and determine whether the current oscillation frequency of the oscillating airflow is a resonant frequency based on the airflow detection signal, including one of the following:

[0209] Firstly, the detection module 500 includes a flow velocity detection component and a pressure detection component. The control module 600 is also used to acquire the flow velocity signal of the oscillating airflow through the flow velocity detection component and the pressure signal of the oscillating airflow through the pressure detection component, calculate the phase difference between the pressure signal and the flow velocity signal, and when the phase difference is zero... Figure 5 As shown, or when the current oscillation frequency is less than the preset phase difference threshold, the current oscillation frequency is determined to be the resonance frequency.

[0210] Understandably, compared to the approach of continuously calculating the phase difference between pressure and velocity signals at different frequencies within a preset frequency range (e.g., 2-20Hz) by outputting an oscillating airflow, the approach of dynamically adjusting the oscillation frequency of the oscillating airflow from its initial frequency to its resonant frequency—that is, stopping the adjustment of the oscillating airflow frequency when the phase difference between the pressure and velocity signals at the current oscillation frequency is detected to be zero or less than a preset phase difference threshold—can more quickly obtain the target operating frequency of the oscillating airflow, reduce unnecessary phase difference calculations for frequencies, and improve the system's operating efficiency.

[0211] Secondly, the detection module 500 includes a flow rate detection component and a pressure detection component. The control module 600 is also used to obtain the flow rate signal of the oscillating airflow through the flow rate detection component and the pressure signal of the oscillating airflow through the pressure detection component. It calculates the impedance value of the respiratory system based on the flow rate signal and the pressure signal. When the impedance value is less than the preset impedance value or is the minimum value compared with the historical impedance value, it determines that the current oscillation frequency is the resonant frequency.

[0212] Understandably, compared to the approach of continuously calculating impedance values ​​using pressure and flow velocity signals at different frequencies within a preset frequency range (e.g., 2-20Hz) by outputting oscillating airflow, the method of dynamically adjusting the oscillation frequency of the oscillating airflow from the initial frequency to the resonant frequency—that is, stopping the adjustment of the oscillating airflow frequency when the impedance value calculated from the pressure and flow velocity signals at the current oscillation frequency is less than the preset impedance value or is the minimum compared to historical impedance values—can more quickly obtain the target operating frequency of the oscillating airflow, reduce unnecessary impedance value calculations at frequencies, and improve the system's operating efficiency.

[0213] Thirdly, the detection module 500 includes a pressure detection component, and the control module 600 is also used to acquire the pressure signal of the oscillating airflow through the pressure detection component, determine the pressure signal amplitude, and when the pressure signal amplitude is greater than the preset amplitude or is the maximum value compared with the historical pressure signal amplitude, determine that the current oscillation frequency is the resonance frequency.

[0214] Understandably, compared to the approach of continuously detecting whether the working amplitude of the pressure signal at different frequencies within a preset frequency range (e.g., 2-20Hz) is greater than the preset amplitude by outputting an oscillating airflow, the approach of dynamically adjusting the oscillation frequency of the oscillating airflow from the initial frequency to the resonant frequency—that is, stopping the adjustment of the oscillating airflow frequency when the amplitude of the pressure signal at the current oscillation frequency is greater than the preset amplitude or is the maximum value compared to the historical pressure signal amplitude—can more quickly obtain the target working frequency of the oscillating airflow, reduce the detection of pressure signal amplitude at unnecessary frequencies, and improve the system's operating efficiency.

[0215] In one embodiment, the control module 600 is used to control the oscillation module 400 to adjust the oscillation frequency of the oscillating airflow when the current oscillation frequency of the oscillating airflow is a non-resonant frequency, including one of the following:

[0216] Firstly, the control module 600 is used to refer to the following when the current oscillation frequency of the oscillating airflow is a non-resonant frequency: Figure 6 The frequency adjustment increment is determined based on the phase difference, impedance value, or magnitude of the pressure signal amplitude, and the oscillation module 400 is controlled to increase or decrease the frequency of the oscillating airflow based on the frequency adjustment increment.

[0217] Understandably, the control module 600 is used to determine the frequency adjustment increment through a closed-loop feedback algorithm, such as a PID algorithm, when the current oscillation frequency of the oscillating airflow is a non-resonant frequency. This is based on the difference between the calculated phase difference and the target phase difference, or the difference between the calculated impedance value and the target impedance value, or the difference between the detected pressure signal amplitude and the preset amplitude or historical pressure signal amplitude. The control module 600 then controls the oscillation module 400 to increase or decrease the frequency of the oscillating airflow according to the frequency adjustment increment.

[0218] Secondly, the control module 600 is used to control the oscillation module 400 to increase or decrease the frequency of the oscillating airflow according to the preset frequency adjustment step size when the current oscillation frequency of the oscillating airflow is a non-resonant frequency.

[0219] In one embodiment, the control module 600 is used to determine the target operating amplitude based on the target oscillation frequency range and to determine the target operating frequency based on the airflow detection signal of the first airflow. It can be understood that the determination is performed in two rounds using the same first airflow detection signal. First, the target operating frequency is determined based on the first airflow detection signal. In determining the target operating frequency, it is only necessary for the airflow characteristics to meet preset conditions when the airflow detection signal is at a certain oscillation frequency. The oscillation frequency can then be directly determined as the target operating frequency without waiting to traverse all other different oscillation frequencies to obtain a target oscillation frequency range that meets the preset conditions before determining the target operating frequency. Second, the oscillation frequency of the first airflow signal is adjusted, and within different oscillation frequencies, a target oscillation frequency range whose airflow characteristics meet the preset conditions is determined. Then, the target operating amplitude is determined based on the target oscillation frequency range.

[0220] In one embodiment, the control module 600 is used to determine a target operating frequency based on the airflow detection signal of the first airflow, including one of the following:

[0221] Firstly, the control module 600 is used to determine the impedance value of the respiratory system under different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency corresponding to the minimum impedance value or the target operating frequency where the impedance value is less than the preset impedance value.

[0222] It should be noted that when sputum appears in the airway, the calculated impedance value changes significantly and decreases. The target operating frequency corresponding to the minimum impedance value is close to the resonant frequency, and the target operating frequency with an impedance value lower than the preset impedance value is also close to the resonant frequency. The oscillating airflow at this target operating frequency can better enhance the sputum expectoration effect.

[0223] Secondly, the control module 600 is used to determine the phase of the pressure signal and the flow velocity signal under different oscillation frequencies of the first airflow, calculate the phase difference between the pressure signal and the flow velocity signal, and determine the target operating frequency where the phase difference is zero or less than the preset phase difference threshold.

[0224] It is understandable that by continuously calculating the phase difference between pressure signals and flow velocity signals at different oscillation frequencies, and determining the target working frequency where the phase difference is zero or less than a preset phase difference threshold, and where the target working frequency is equal to or close to the resonant frequency, the oscillating airflow at the target working frequency can better enhance the expectoration effect.

[0225] Thirdly, the control module 600 is used to determine the pressure signal amplitude of the pressure signal at different oscillation frequencies of the first airflow based on the pressure signal, and to determine the working frequency corresponding to the maximum value of the pressure signal amplitude or the target working frequency where the pressure signal amplitude is greater than the preset amplitude.

[0226] It should be noted that the oscillation module 400 generates first airflow signals with different oscillation frequencies but the same peak value. If resonance occurs, the pressure signal amplitude of the pressure signal at the detected different oscillation frequencies will be the largest. Based on this principle, the control module 600 acquires the pressure signal of the airflow in the air supply channel, determines the pressure signal amplitude of the pressure signal at different oscillation frequencies based on the pressure signal, and determines the target oscillation frequency corresponding to the maximum value of the pressure signal amplitude or the target working frequency with a pressure signal amplitude greater than the preset amplitude, which is equal to or close to the resonance frequency. The oscillating airflow at this target working frequency can better enhance the expectoration effect.

[0227] Fourthly, the control module 600 is used to determine the impedance value of the respiratory system under different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency where the impedance value change amplitude is greater than a preset threshold.

[0228] Understandably, the oscillation module 400 generates a first airflow with different oscillation frequencies, such as 2-20Hz. This first airflow at different frequencies is injected into the lungs. The detection module 500 detects the airflow within the air supply duct, obtaining airflow detection signals, namely, the airflow pressure signal and flow velocity signal. The control module 600 determines the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and flow velocity signal. When sputum is present in the airway, there will be significant resistance at that location, causing a substantial change in impedance value. Based on this change, sputum accumulation can be identified. Furthermore, at each frequency, the relationship between the impedance value and the pressure and flow velocity signals conforms to the following formula:

[0229]

[0230] As can be seen from the above formula, Z(f) represents the impedance value at a certain oscillation frequency, P(f) represents the pressure value at a certain oscillation frequency, and V(f) represents the flow velocity value at a certain oscillation frequency. When the impedance change value ΔZ(f), i.e. the impedance change amplitude, is greater than the preset threshold Z1, the corresponding frequency range f1 to f3 is the target oscillation frequency range. Furthermore, a target working frequency is determined within the target frequency range. This target working frequency may be close to or equal to the resonant frequency. The oscillating airflow at this target working frequency can better enhance the sputum expectoration effect.

[0231] It should be noted that if the target working amplitude needs to be determined based on the first airflow, it is possible to wait until the first airflow has traversed other different oscillation frequencies and obtain the target oscillation frequency range f1 to f2 that meets the preset conditions (the impedance value change amplitude is greater than the preset threshold), where f2 is greater than f3. The frequency range f1 to f2 is then determined as the target oscillation frequency range, and the target working amplitude is determined based on this target oscillation frequency range.

[0232] Fifth, the control module 600 is used to determine the impedance value of the respiratory system under different oscillation frequencies of the first airflow and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine the first working frequency where the impedance value change amplitude is greater than a preset threshold and the second working frequency where the phase difference is zero or less than the preset phase difference threshold, and to determine the target working frequency based on the first working frequency and the second working frequency.

[0233] It should be noted that the values ​​of the first and second operating frequencies are similar and close to the resonant frequency. The average value can be obtained by statistically calculating the first and second operating frequencies and then using the calculated average value as the target operating frequency. Alternatively, the maximum or minimum value can be selected from the first and second operating frequencies as the target operating frequency. In addition, the target operating frequency calculated statistically is more accurate and closer to the resonant frequency. The oscillating airflow at this target operating frequency can better enhance the expectoration effect.

[0234] In one embodiment, determining the target operating frequency based on the target oscillation frequency range includes determining the target position of sputum in a plurality of preset positions in the respiratory system based on the target oscillation frequency range, and determining the target operating amplitude based on the target position of sputum in the respiratory system.

[0235] Understandably, the multiple preset locations are the main trachea, bronchus, first bronchus, and second bronchus. Based on the principle that low-frequency signals travel farther and high-frequency signals travel shorter, the target oscillation frequency within the target oscillation frequency range is compared with a certain preset frequency value to determine the target location of sputum in the respiratory system. If the target location is the main trachea, the target working amplitude is determined based on the location of sputum in the respiratory system, for example, setting the target working amplitude to a smaller first amplitude. If the target location is the bronchus, the target working amplitude is determined based on the location of sputum in the respiratory system, for example, setting the target working amplitude to a larger second amplitude. If the target location is the first bronchus, the target working amplitude is determined based on the location of sputum in the respiratory system, for example, setting the target working amplitude to a larger fourth amplitude. If the target location is the second bronchus, the target working amplitude is determined based on the location of sputum in the respiratory system, for example, setting the target working amplitude to a fifth amplitude greater than the fourth amplitude.

[0236] In one embodiment, the control module 600 is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal acquired by the detection module 500, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including the following process:

[0237] First, the control module 600 is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module 500, and to determine whether there is sputum in the respiratory system based on the airflow characteristics.

[0238] Secondly, if the target oscillation frequency range with airflow characteristics meets the preset conditions in different oscillation frequencies, it is determined that sputum is present, and the target working frequency and / or target working amplitude are determined according to the target oscillation frequency range.

[0239] Understandably, by determining whether there is sputum in the respiratory system based on airflow characteristics, and then precisely controlling the operating parameters of the oscillation module 400, such as the target operating frequency and target operating amplitude, it is possible to avoid using inappropriate target operating frequencies and target operating amplitudes, thus ensuring the sputum expectoration effect while avoiding causing discomfort to the patient.

[0240] Finally, if no airflow characteristics meet the preset conditions at different oscillation frequencies, it is determined that there is no sputum, and the oscillation module 400 is controlled to stop generating the first airflow.

[0241] Understandably, stopping the operation of the oscillation module 400 promptly when it is confirmed that there is no sputum can avoid unnecessary energy consumption and equipment wear, help extend the service life of the equipment, and reduce operating costs.

[0242] In one embodiment, the sputum expectoration device 100 further includes a display 700, and the control module 600 is further configured to control the display 700 to display the position of sputum in the respiratory system according to the target oscillation frequency range, or the control module 600 is further configured to control the display 700 to provide operation prompts according to the target operating frequency and / or target operating amplitude.

[0243] It is understandable that by adding a display 700 to the sputum suction device 100 and having the control module 600 control the display 700 to display the sputum position according to the target oscillation frequency, the user interaction capability, personalized treatment level, real-time monitoring and recording function, and overall intelligence level of the device can be significantly improved, which helps to provide patients with safer, more effective and convenient treatment services.

[0244] It is understandable that by adding a display 700 to the sputum expectoration device 100 and having the control module 600 control the display 700 to provide operation prompts according to the target operating frequency and / or target operating amplitude, medical staff can select appropriate parameters so that the control module 600 can control the oscillation module 700, thereby enabling the oscillation module 700 to output a precise oscillating airflow to clear sputum at a certain location in the airway.

[0245] In another embodiment, the display 700 can be externally connected to the sputum suction device 100, and the display can be flexibly moved to the required position, so that medical staff can make adjustments according to the patient's specific condition and treatment needs.

[0246] In one embodiment, the display 700 shows a UI interface that simulates the main airway and the bronchial airway of the respiratory system. The control module 600 determines the position of sputum in the respiratory system according to the target oscillation frequency range, and marks the position of sputum in the simulated main airway or simulated bronchial airway in the UI interface according to the position of sputum in the respiratory system.

[0247] Understandably, the UI design not only enhances the visual feedback capabilities of the sputum suction device 100, but also improves the accuracy, personalization, and user experience of treatment. At the same time, it provides strong support for auxiliary diagnosis, evaluation of treatment effectiveness, patient education, and training of medical staff.

[0248] In one embodiment, the sputum suction device 100 further includes a prompting module 800 and a human-computer interaction module 900;

[0249] The control module 600 is also used to prompt the user with frequency information for adjusting the frequency of the oscillating airflow and amplitude information for adjusting the amplitude of the oscillating airflow through the prompting module 800;

[0250] It should be noted that the prompt module 800 can intelligently provide adjustment prompts for the oscillating airflow frequency and amplitude based on the actual working status of the device and the user's historical operation records. For example, it can directly prompt the target working frequency and / or target working amplitude.

[0251] The control module 600 is also used to receive user adjustments to the target operating frequency and target operating amplitude via the human-computer interaction module 900, and to control the oscillation module 400 to generate an oscillating airflow to promote the patient's expectoration at the adjusted target operating frequency and / or target operating amplitude.

[0252] It should be noted that the combination of the human-computer interaction module 900 and the prompting module 800 can effectively prevent users from causing equipment malfunctions or discomfort to patients due to misoperation.

[0253] In one embodiment, after receiving the target operating frequency and target operating amplitude input by the user, the control module 600 verifies them to ensure that the device operates within a safe range.

[0254] Understandably, the inclusion of the prompt module 800 and the human-computer interaction module 900 significantly improves the sputum suction device 100 in terms of flexibility, treatment effectiveness, user experience, safety, and intelligence.

[0255] In one embodiment, the control module 600 is further configured to monitor the airflow detection signal of the oscillating airflow through the detection module 500 and determine the sputum position parameters based on the airflow detection signal; the control module 600 is further configured to control the oscillation module 400 to stop generating the oscillating airflow when the sputum position parameters indicate a change in the sputum in the respiratory system or when the sputum disappears; or, the control module 600 is further configured to control the prompting device to issue a suctioning prompt to the user when the sputum position parameters indicate a change in the sputum in the respiratory system.

[0256] It should be noted that the control module 600 is also used to monitor the airflow detection signal of the oscillating airflow through the detection module 500 and determine the sputum position parameters based on the airflow detection signal. The control module 600 can track the changes of sputum in the respiratory system in real time, enabling the device to adjust the treatment strategy in a timely manner according to the actual situation of the sputum, thereby improving the treatment effect. In addition, the control module 600 is also used to control the oscillation module 400 to stop generating oscillating airflow when the sputum position parameters indicate a change in the sputum in the respiratory system or when the sputum disappears, avoiding unnecessary energy consumption and equipment wear, while also ensuring patient comfort. Furthermore, the control module 600 is also used to control the prompting device to issue a suctioning prompt to the user when the sputum position parameters indicate a change in the sputum in the respiratory system, such as when the sputum has become loose but has not been completely expelled, so that the user can take suctioning measures in a timely manner to optimize the treatment effect.

[0257] In some embodiments of this application, the control module 600 precisely controls the oscillating airflow output by the oscillation module 400, effectively promoting sputum expectoration in patients. Specifically, the control module 400 generates first airflows with different oscillation frequencies from the air source. The airflow detection signal acquired by the detection module 500 determines the airflow characteristics at different oscillation frequencies. These characteristics reflect the response of the patient's respiratory system to the first airflows at different frequencies. Based on this, a target oscillation frequency range is determined within different oscillation frequencies, ensuring the airflow characteristics meet preset conditions. A target operating frequency and / or target operating amplitude are then determined based on this target oscillation frequency range. The oscillation module 400 is then controlled to generate an oscillating airflow with the target operating frequency and / or target operating amplitude to promote sputum expectoration. Since the target oscillation frequency range reflects the state of sputum in the respiratory system, the target operating frequency and / or target operating amplitude of the oscillating airflow determined by the target oscillation frequency range can automatically match the patient's respiratory system, ensuring the oscillation characteristics of the airflow suit the patient's needs. This not only improves the efficiency and effectiveness of sputum expectoration but also significantly enhances the patient's treatment experience and reduces the workload of medical staff.

[0258] On the other hand, embodiments of this application provide a sputum detection device, referring to... Figure 7 ,include:

[0259] Breathing tubing 300, used to connect to the patient's respiratory system;

[0260] The air source is connected to the breathing tubing 300 to form an air supply channel that communicates with the respiratory system. The air source is used to provide airflow to the air supply channel.

[0261] The oscillation module 400 is connected to or installed on the air supply duct and is used to cause the airflow output from the air source to oscillate.

[0262] The detection module 500 is installed on the air supply duct and is used to detect the airflow in the air supply duct to obtain an airflow detection signal.

[0263] Control module 600, connected to oscillation module 400 and detection module 500, is used for:

[0264] The control oscillation module 400 generates a first airflow with different oscillation frequencies;

[0265] Based on the airflow detection signal obtained by the detection module 500, the airflow characteristics at different oscillation frequencies are determined, and within different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined.

[0266] The location of sputum in the respiratory system is determined based on the target oscillation frequency range, and the display 700 is controlled to show the location of sputum in the respiratory system.

[0267] In one embodiment, the specific implementation of the relevant modules can be referred to the description of the foregoing embodiments.

[0268] In some embodiments of this application, the airflow provided by the air source is controlled by the oscillation module 400 to generate first airflows with different oscillation frequencies. The airflow detection signal acquired by the detection module 500 determines the airflow characteristics at different oscillation frequencies. These airflow characteristics reflect the response of the patient's respiratory system to the first airflows at different oscillation frequencies. Based on this, a target oscillation frequency range is determined within different oscillation frequencies, where the airflow characteristics meet preset conditions. The position of sputum in the respiratory system is determined according to the target oscillation frequency range and displayed on the display 700. In this embodiment, since the target oscillation frequency range reflects the state of sputum in the respiratory system, the position of sputum in the respiratory system can be further determined, thus providing medical staff with more accurate treatment guidance. Medical staff can adjust their sputum expectoration strategies based on the sputum position data provided on the display 700. This embodiment reduces reliance on the experience of medical staff, making the sputum expectoration process more standardized and efficient.

[0269] In one embodiment, reference is made to Figure 7 The control module 600 is also used to control the display 700 to display the UI interface of the simulated respiratory system airway, the simulated main airway and the simulated bronchus. The control module 600 marks the position of the sputum in the simulated main airway or simulated bronchus in the UI interface according to the position of the sputum in the respiratory system.

[0270] Understandably, the UI design not only enhances the visual feedback capabilities of the sputum suction device 100, but also improves the accuracy, personalization, and user experience of treatment. At the same time, it provides strong support for auxiliary diagnosis, evaluation of treatment effectiveness, patient education, and training of medical staff.

[0271] On the other hand, embodiments of this application provide a ventilator that includes the sputum expectoration device 100 provided in any of the above embodiments, or includes the sputum detection device provided in any of the above embodiments.

[0272] On the other hand, refer to Figure 8This application provides a method for expectoration, applied to a ventilator. The ventilator includes an air source, a breathing tubing 300, an oscillation module 400, and a detection module 500. The air source is connected to the breathing tubing 300 to form an air supply channel communicating with the respiratory system. The oscillation module 400 is connected to or disposed on the air supply channel to cause the airflow output by the air source to oscillate and form an oscillating airflow. The detection module 500 is disposed on the air supply channel. The method includes steps S2100-S2400, the specific implementation of which can be referred to the description of the foregoing embodiments.

[0273] S2100: Controls the oscillation module 400 to generate first airflows with different oscillation frequencies;

[0274] S2200: The airflow detection signal in the air supply duct is obtained through the detection module 500;

[0275] S2300: Determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module 500, and determine the target oscillation frequency range in which the airflow characteristics meet the preset conditions in different oscillation frequencies;

[0276] S2400: Determine the target operating frequency and / or target operating amplitude according to the target oscillation frequency range, and control the oscillation module 400 to generate an oscillating airflow to promote the patient's expectoration according to the target operating frequency and / or target operating amplitude; or, output the target operating frequency and / or the target operating amplitude to suggest to the user to control the oscillation module to generate an oscillating airflow to promote the patient's expectoration with the target operating frequency and / or the target operating amplitude.

[0277] This application provides a sputum expectoration method that uses a control module 600 to precisely control the oscillating airflow output by an oscillating module 400, effectively promoting sputum expectoration in patients. Specifically, the oscillating module 400 controls the airflow from the air source to generate first airflows with different oscillation frequencies. The airflow detection signal acquired by the detection module 500 determines the airflow characteristics at different oscillation frequencies. These characteristics reflect the response of the patient's respiratory system to the first airflow at different frequencies. Based on this, a target oscillation frequency range is determined within different oscillation frequencies, ensuring the airflow characteristics meet preset conditions. A target operating frequency and / or target operating amplitude are then determined based on this target oscillation frequency range. The oscillating module 400 is then controlled to generate an oscillating airflow with the target operating frequency and / or target operating amplitude to promote sputum expectoration. Since the target oscillation frequency range reflects the state of sputum in the respiratory system, the target operating frequency and / or target operating amplitude of the oscillating airflow determined by the target oscillation frequency range can automatically match the patient's respiratory system, ensuring the oscillation characteristics of the airflow suit the patient's needs. This not only improves the efficiency and effectiveness of sputum expectoration but also significantly improves the patient's treatment experience and reduces the workload of medical staff.

[0278] On the other hand, refer to Figure 9 This application provides a sputum detection method applied to a ventilator. The ventilator includes an air source, a breathing tubing 300, an oscillation module 400, a detection module 500, and a display 700. The air source is connected to the breathing tubing 300 to form a supply airway communicating with the respiratory system. The oscillation module 400 is connected to or disposed on the supply airway to cause the airflow output by the air source to oscillate and form an oscillating airflow. The detection module 500 is disposed on the supply airway. The method includes steps S3100-S3300, the specific implementation of which can be referred to the description of the foregoing embodiments.

[0279] S3100: Controls the oscillation module 400 to generate first airflows with different oscillation frequencies;

[0280] S3200: Determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module 500, and determine the target oscillation frequency range in which the airflow characteristics meet the preset conditions in different oscillation frequencies;

[0281] S3300: Determines the location of sputum in the respiratory system based on the target oscillation frequency range, and controls the display 700 to show the location of sputum in the respiratory system.

[0282] Another sputum expectoration method provided in this application embodiment controls the oscillation module 400 to generate first airflows with different oscillation frequencies from the air supply. The airflow detection signal acquired by the detection module 500 determines the airflow characteristics at different oscillation frequencies. These airflow characteristics reflect the patient's respiratory system's response to the first airflows at different oscillation frequencies. Based on this, a target oscillation frequency range is determined where the airflow characteristics meet preset conditions. The position of sputum in the respiratory system is determined according to the target oscillation frequency range and displayed on the display 700. In this embodiment, since the target oscillation frequency range reflects the state of sputum in the respiratory system, its position can be further determined, providing medical personnel with more accurate treatment guidance. Medical personnel can adjust their sputum expectoration strategies based on the sputum position data provided on the display 700. This application embodiment reduces reliance on the experience of medical personnel, making the sputum expectoration process more standardized and efficient.

[0283] On the other hand, embodiments of this application provide a control device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it executes the sputum expectoration method provided in any of the above embodiments, or executes the sputum detection method provided in any of the above embodiments.

[0284] It is understood that although the steps in the flowcharts of this application are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated in this embodiment, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the above flowcharts may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps.

[0285] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate to describe embodiments of this application, for example, those that can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatuses.

[0286] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0287] It should be understood that in the description of the embodiments of this application, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0288] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0289] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0290] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0291] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0292] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0293] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A sputum expectoration device, characterized in that, include: Breathing tubing is used to connect to a patient's respiratory system; An air source is connected to the breathing tube to form an air supply channel communicating with the respiratory system; the air source is used to provide airflow to the air supply channel. An oscillation module, connected to or installed on the air supply duct, is used to cause the airflow provided by the air source to oscillate. A detection module is installed on the air supply duct to detect the airflow in the air supply duct and obtain an airflow detection signal. A control module, connected to the oscillation module and the detection module, is used for: The oscillation module is controlled to generate first airflows with different oscillation frequencies; Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined; The target operating frequency and / or target operating amplitude of the oscillation module are determined based on the target oscillation frequency range. The control module is configured to control the oscillation module to generate an oscillating airflow to promote the patient's expectoration based on the target operating frequency and / or the target operating amplitude; or, the control module is configured to output the target operating frequency and / or the target operating amplitude to suggest to the user that the oscillation module be controlled at the target operating frequency and / or the target operating amplitude to generate an oscillating airflow to promote the patient's expectoration.

2. The sputum expectoration device according to claim 1, characterized in that, The detection module includes a flow rate detection component and a pressure detection component; The airflow detection signal includes: the flow velocity signal of the first airflow obtained by the flow velocity detection component, and the pressure signal of the first airflow obtained by the pressure detection component.

3. The sputum expectoration device according to claim 2, characterized in that, The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including one of the following: The control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency range in which the impedance value changes by a greater than a preset threshold. Alternatively, the control module is used to determine the phase of the pressure signal and the flow velocity signal at different oscillation frequencies, calculate the phase difference between the pressure signal and the flow velocity signal at different oscillation frequencies, and determine the target oscillation frequency range where the phase difference is zero or less than a preset phase difference threshold. Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine a first target frequency range in which the impedance value changes by a greater than a preset threshold and a second target frequency range in which the phase difference is zero or less than a preset phase difference threshold, and to determine the target oscillation frequency range based on the first target frequency range and the second target frequency range; Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency corresponding to the minimum impedance value or the target oscillation frequency range where the impedance value is less than a preset impedance value. Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies based on the pressure signal and the flow rate signal, and to determine the target oscillation frequency range in which the impedance value is greater than a preset impedance value.

4. The sputum expectoration device according to claim 1, characterized in that, The detection module includes a pressure detection component; The airflow detection signal includes: the pressure signal of the first airflow obtained by the pressure detection component; The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including: The control module is used to acquire the pressure signal of the airflow in the air supply duct through the pressure detection component, and determine the pressure signal amplitude of the pressure signal at different oscillation frequencies based on the pressure signal, and determine the target oscillation frequency corresponding to the maximum value of the pressure signal amplitude or the target oscillation frequency range where the pressure signal amplitude is greater than the preset amplitude.

5. The sputum expectoration device according to claim 1, characterized in that, The control module is used to determine the target operating frequency and / or target operating amplitude according to the target oscillation frequency range, including: The control module is used to determine the target operating frequency based on the target oscillation frequency range, and to determine the target operating amplitude based on the target oscillation frequency range; or, The control module is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal of the first airflow; or, The control module is used to determine the target operating amplitude based on the target oscillation frequency range, and to determine the target operating frequency based on the airflow detection signal generated by the oscillation module to generate a second airflow.

6. The sputum expectoration device according to any one of claims 1 to 5, characterized in that, The control module is used to determine the target operating amplitude based on the target oscillation frequency range, including: Determine the target frequency parameters based on the target oscillation frequency range; The target frequency parameter is compared with at least two frequency threshold conditions, wherein different frequency threshold conditions correspond to different levels of working amplitude; Determine the target frequency threshold condition that the target frequency parameter meets, and take the working amplitude corresponding to the level of the target frequency threshold condition as the target working amplitude.

7. The sputum expectoration device according to any one of claims 1 to 5, characterized in that, The control module is used to determine the target operating amplitude based on the target oscillation frequency range, including: Determine the target frequency parameters based on the target oscillation frequency range; If the target frequency parameter is greater than the first frequency threshold, the target working amplitude is determined to be the first amplitude; If the target frequency parameter is less than the second frequency threshold, the target working amplitude is determined to be the second amplitude. Wherein, the second frequency threshold is less than or equal to the first frequency threshold, and the second amplitude is greater than the first amplitude.

8. The sputum expectoration device according to claim 7, characterized in that, The amplitude of the first airflow is the third amplitude; wherein, The third amplitude is less than or equal to the first amplitude; Alternatively, the third amplitude may be greater than the first amplitude and less than the second amplitude.

9. The sputum expectoration device according to any one of claims 1 to 5, characterized in that, The control module is used to determine the target operating frequency based on the target oscillation frequency range, including one of the following: The control module is used to select one of the target oscillation frequency ranges as the target operating frequency; Alternatively, the control module may perform statistical calculations on the target oscillation frequency range to obtain the target operating frequency.

10. The sputum expectoration device according to claim 5, characterized in that, The control module determines the target operating frequency based on the airflow detection signal generated by the oscillation module to produce the second airflow, including: The oscillation module is controlled to output an oscillating airflow with an oscillation frequency equal to the initial frequency; The detection module acquires the airflow detection signal of the oscillating airflow and determines whether the current oscillation frequency of the oscillating airflow is the resonance frequency based on the airflow detection signal. If the current oscillation frequency of the oscillating airflow is a non-resonant frequency, the oscillation module is controlled to adjust the oscillation frequency of the oscillating airflow, and the process returns to the step of obtaining the airflow detection signal through the detection module. When the current oscillation frequency of the oscillating airflow is the resonant frequency, the resonant frequency is used as the target operating frequency.

11. The sputum expectoration device according to claim 10, characterized in that, The control module is used to acquire the airflow detection signal of the oscillating airflow through the detection module, and determine whether the current oscillation frequency of the oscillating airflow is a resonant frequency based on the airflow detection signal, including one of the following: The detection module includes a flow velocity detection component and a pressure detection component. The control module is also used to acquire the flow velocity signal of the oscillating airflow through the flow velocity detection component and the pressure signal of the oscillating airflow through the pressure detection component, calculate the phase difference between the pressure signal and the flow velocity signal, and determine that the current oscillation frequency is the resonance frequency when the phase difference is zero or less than a preset phase difference threshold. The detection module includes a flow rate detection component and a pressure detection component. The control module is also used to acquire the flow rate signal of the oscillating airflow through the flow rate detection component and the pressure signal of the oscillating airflow through the pressure detection component, and to calculate the impedance value of the respiratory system based on the flow rate signal and the pressure signal. When the impedance value is less than a preset impedance value or is the minimum value compared with the historical impedance value, the current oscillation frequency is determined to be the resonant frequency. Alternatively, the detection module includes a pressure detection component, and the control module is further configured to acquire the pressure signal of the oscillating airflow through the pressure detection component, determine the pressure signal amplitude of the pressure signal, and determine that the current oscillation frequency is the resonance frequency when the pressure signal amplitude is greater than a preset amplitude or is the maximum value compared with the historical pressure signal amplitude.

12. The sputum expectoration device according to claim 10, characterized in that, The control module is used to adjust the oscillation frequency of the oscillating airflow when the current oscillation frequency of the oscillating airflow is a non-resonant frequency, including one of the following: The control module is used to determine the frequency adjustment increment based on the phase difference, the impedance value, or the magnitude of the pressure signal amplitude when the current oscillation frequency of the oscillating airflow is a non-resonant frequency, and to control the oscillation module to increase or decrease the frequency of the oscillating airflow based on the frequency adjustment increment. Alternatively, the control module is used to control the oscillation module to increase or decrease the frequency of the oscillating airflow according to a preset frequency adjustment step size when the current oscillation frequency of the oscillating airflow is a non-resonant frequency.

13. The sputum expectoration device according to claim 5, characterized in that, The control module is used to determine the target operating frequency based on the airflow detection signal of the first airflow, including one of the following: The control module is used to determine the impedance value of the respiratory system under different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency corresponding to the minimum impedance value or the target operating frequency where the impedance value is less than a preset impedance value. Alternatively, the control module is used to determine the phase of the pressure signal and the flow velocity signal at different oscillation frequencies of the first airflow, calculate the phase difference between the pressure signal and the flow velocity signal, and determine the target operating frequency where the phase difference is zero or less than a preset phase difference threshold. Alternatively, the control module is used to determine the pressure signal amplitude of the pressure signal at different oscillation frequencies of the first airflow based on the pressure signal, and to determine the operating frequency corresponding to the maximum value of the pressure signal amplitude or the target operating frequency where the pressure signal amplitude is greater than a preset amplitude. Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies of the first airflow based on the pressure signal and the flow rate signal, and to determine the target operating frequency where the impedance value changes by a greater than a preset threshold. Alternatively, the control module is used to determine the impedance value of the respiratory system at different oscillation frequencies of the first airflow and the phase difference between the pressure signal and the flow rate signal based on the pressure signal and the flow rate signal, and to determine a first operating frequency where the impedance value change amplitude is greater than a preset threshold and a second operating frequency where the phase difference is zero or less than a preset phase difference threshold, and to determine the target operating frequency based on the first operating frequency and the second operating frequency.

14. The sputum expectoration device according to any one of claims 1 to 5, characterized in that, The step of determining the target working amplitude based on the target oscillation frequency range includes determining the target position of sputum in a plurality of preset positions in the respiratory system based on the target oscillation frequency range, and determining the target working amplitude based on the target position of sputum in the respiratory system.

15. The sputum expectoration device according to any one of claims 1 to 5, characterized in that, The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine a target oscillation frequency range in which the airflow characteristics meet preset conditions, including: The control module is used to determine the airflow characteristics at different oscillation frequencies based on the airflow detection signal obtained by the detection module, and to determine whether there is sputum in the respiratory system based on the airflow characteristics. If the airflow characteristics meet the target oscillation frequency range within different oscillation frequencies, it is determined that sputum is present, and the target working frequency and / or target working amplitude are determined according to the target oscillation frequency range.

16. The sputum expectoration device according to claim 1, characterized in that, The sputum expectoration device also includes a display, and the control module is further configured to control the display to show the position of sputum in the respiratory system according to the target oscillation frequency range.

17. The sputum expectoration device according to claim 16, characterized in that, The display shows a UI interface simulating the main airway and bronchial airways of the respiratory system. The control module determines the position of sputum in the respiratory system according to the target oscillation frequency range, and marks the position of sputum in the simulated main airway or simulated bronchial airway in the UI interface according to the position of sputum in the respiratory system.

18. The sputum expectoration device according to claim 1, characterized in that, The sputum suction device further includes a prompting module and a human-computer interaction module; the control module, after outputting the target operating frequency and / or the target operating amplitude, includes: The control module is used to output the target operating frequency and / or the target operating amplitude through the prompting module; The control module is also used to receive user adjustments to the target operating frequency and / or the target operating amplitude through the human-computer interaction module, and to control the oscillation module to generate an oscillating airflow to promote the patient's expectoration at the adjusted target operating frequency and / or target operating amplitude.

19. The sputum expectoration device according to claim 1, characterized in that, The control module is also used to monitor the airflow detection signal of the oscillating airflow through the detection module and determine the sputum position parameters based on the airflow detection signal; The control module is also used to control the oscillation module to stop generating the oscillating airflow when the sputum position parameter indicates that the sputum in the respiratory system has changed or the sputum has disappeared; or, The control module is also used to control the prompting device to issue a suctioning prompt to the user when the sputum position parameter indicates a change in the sputum in the respiratory system.

20. The sputum expectoration device according to any one of claims 2 to 4, characterized in that, The flow velocity signal is obtained by extracting frequency information from the raw flow velocity signal acquired by the flow velocity detection component. The pressure signal is obtained by extracting frequency information from the raw pressure signal acquired through the pressure detection component.

21. The sputum expectoration device according to any one of claims 1 to 20, characterized in that, The oscillation module includes an oscillation gas source, which is connected to the gas supply channel; Alternatively, the oscillation module includes an air proportional valve and an oxygen proportional valve disposed on the air supply duct, the air source includes an air source and an oxygen source, the air source is connected to the breathing duct through the air proportional valve, the oxygen source is connected to the breathing duct through the oxygen proportional valve, and the control module sends oscillation signals to the air proportional valve and the oxygen proportional valve to cause the air proportional valve and the oxygen proportional valve to oscillate and generate the first airflow and the oscillating airflow; Alternatively, the oscillation module includes an inhalation valve disposed on the air supply duct, the air source being connected to the breathing duct through the inhalation valve, and the control module causing the inhalation valve to oscillate by sending an oscillation signal to the inhalation valve to generate the first airflow and the oscillating airflow.

22. The sputum expectoration device according to claims 1-20, characterized in that, The detection module is installed on the breathing tubing. Alternatively, the breathing tubing includes a connection end for connecting to the air source, and the detection module is disposed on the air supply tubing between the oscillating air source and the connection end; Alternatively, the breathing tubing includes a connection end for connecting to the gas source, and the detection module is disposed on the gas supply tubing between the air proportional valve and / or the oxygen proportional valve and the connection end; Alternatively, the breathing tubing may include a connection end for connecting to the air source, and the detection module may be disposed on the air supply tubing between the inhalation valve and the connection end.

23. A sputum detection device, characterized in that, include: Breathing tubing is used to connect to a patient's respiratory system; An air source is connected to the breathing tube to form an air supply channel communicating with the respiratory system; the air source is used to provide airflow to the air supply channel. An oscillation module, connected to or installed on the air supply duct, is used to cause the airflow output from the air source to oscillate. A detection module is installed on the air supply duct to detect the airflow in the air supply duct and obtain an airflow detection signal. A control module, connected to the oscillation module and the detection module, is used for: The oscillation module is controlled to generate first airflows with different oscillation frequencies; Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined; The location of sputum in the respiratory system is determined based on the target oscillation frequency range, and the display is controlled to show the location of sputum in the respiratory system.

24. The sputum detection device according to claim 23, characterized in that, The control module is also used to control the display to show a UI interface simulating the main airway and the bronchial airway of the respiratory system. The control module marks the position of the sputum in the simulated main airway or simulated bronchial airway in the UI interface according to the position of the sputum in the respiratory system.

25. A ventilator, characterized in that, It includes the sputum expectoration device according to any one of claims 1 to 22, or the sputum detection device according to any one of claims 23 to 24.

26. A method for expectorating phlegm, characterized in that, An application is made in a ventilator, the ventilator including a gas source, a breathing tubing, an oscillation module, and a detection module. The gas source is connected to the breathing tubing to form a gas supply airway communicating with the respiratory system. The oscillation module is connected to or disposed on the gas supply airway to cause the airflow output from the gas source to oscillate, forming an oscillating airflow. The detection module is disposed on the gas supply airway. The method includes: The oscillation module is controlled to generate first airflows with different oscillation frequencies; The airflow detection signal in the air supply duct is obtained through the detection module; Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined; Determine the target operating frequency and / or target operating amplitude based on the target oscillation frequency range; The oscillation module is controlled to generate an oscillating airflow to facilitate expectoration of the patient based on the target operating frequency and / or the target operating amplitude; or, the target operating frequency and / or the target operating amplitude is output to suggest to the user that the oscillation module is controlled to generate an oscillating airflow to facilitate expectoration of the patient based on the target operating frequency and / or the target operating amplitude.

27. A sputum detection method, applied to a ventilator, characterized in that, The ventilator includes a gas source, a breathing tubing, an oscillation module, a detection module, and a display. The gas source is connected to the breathing tubing to form a gas supply airway communicating with the respiratory system. The oscillation module is connected to or disposed on the gas supply airway to oscillate the airflow output from the gas source, forming an oscillating airflow. The detection module is disposed on the gas supply airway. The method includes: The oscillation module is controlled to generate first airflows with different oscillation frequencies; Based on the airflow detection signal obtained by the detection module, the airflow characteristics at different oscillation frequencies are determined, and within the different oscillation frequencies, the target oscillation frequency range in which the airflow characteristics meet the preset conditions is determined; The location of sputum in the respiratory system is determined based on the target oscillation frequency range, and the display is controlled to show the location of sputum in the respiratory system.

28. A control device, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program performing the sputum expectoration method of claim 26 or the sputum detection method of claim 27.

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