A method and system for checking pulmonary function and ventilation function through intelligent voice linkage

Abstract

The present invention relates to a method and system for checking pulmonary function and ventilation function through intelligent voice linkage. The method includes a flow sensor that monitors respiratory waves in real time to obtain flow signals, processes the flow signals to obtain ventilation curves based on time and flow-volume loop curves based on flow and volume; a voice guidance system performs real-time cutting of the flow-volume loop curve obtained by real-time monitoring of respiratory waves to obtain the flow-volume loop of each breath and obtains flow-volume loop data parameters by calculation; outputs corresponding breathing action instructions according to the real-time flow-volume loop data parameters, and simultaneously performs voice guidance for breathing. The system includes a detection curve generation unit, a flow-volume loop data acquisition unit, and a patient examination parameter generation unit. The present invention can solve the problems that current pulmonary function tests are not suitable for real-time detection conditions, have poor detection effects, and have low detection success rates.

Description

Technical Field

[0001] The present invention relates to the field of clinical technology of pulmonary ventilation function, and in particular to a method for checking pulmonary ventilation function through intelligent voice linkage. Background Art

[0002] At present, the operation of the pulmonary function instrument requires the patient to loudly instruct the patient on how to cooperate with the breathing action while controlling the device. The normal process is to issue an instruction first, and the patient performs the breathing action according to the instruction. The operator sees the subject's breathing waveform on the screen and interprets the breathing waveform. If it meets the requirements, the operator will issue the next breathing action instruction. If it does not meet the requirements (that is, the patient does not understand the instruction), the operator needs to issue an instruction to improve the breathing action.

[0003] Currently, most of the lung function testers on the market do not have voice command functions. Some of them provide very mechanical voice guidance and are not suitable for real-time testing situations (such as issuing an inhalation command during inhalation; when the patient does not listen to the command and has switched to other breathing states, there is no timely guidance to issue the next command, etc.), so the effect is poor and the detection success rate is very low. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for checking lung function and ventilation function through intelligent voice linkage, which is used to solve the problems that current lung function testing is not suitable for real-time testing, the testing effect is poor, and the testing success rate is low.

[0005] To achieve the above object, the present invention provides a method for checking pulmonary function and ventilation function through intelligent voice linkage, the improvement of which is that it includes:

[0006] (1) The flow sensor monitors the respiratory wave in real time to obtain the flow signal, and processes the flow signal to obtain a ventilation curve based on time and a flow-volume loop curve based on flow and volume;

[0007] (2) The voice guidance system cuts the flow volume loop curve obtained by real-time monitoring of respiratory waves in real time to obtain the flow volume loop of each breath and obtains the flow volume loop data parameters by calculation;

[0008] (3) Output corresponding breathing action instructions based on the flow volume loop data parameters, and provide voice guidance for breathing at the same time.

[0009] Preferably, the flow volume loop in step (2) includes a flow volume expiratory loop, PEF, MEF75, MEF50, MEF25, MMEF, FVC, FEV1, PIF, FIV1 and MIF50;

[0010] Among them, PEF is the maximum expiratory peak flow PEF, MEF75 is the instantaneous expiratory flow at 75% of the remaining forced vital capacity, MEF50 is the instantaneous expiratory flow at 50% of the remaining forced vital capacity, MEF25 is the instantaneous expiratory flow at 25% of the remaining forced vital capacity, MMEF is the mid-term expiratory flow, FVC is the forced vital capacity, FEV1 is the expiratory volume in one second, PIF is the maximum inspiratory peak flow, FIV1 is the inspiratory volume in one second and MIF50 is the instantaneous inspiratory flow at 50% of the forced vital capacity.

[0011] Preferably, the step (3) comprises

[0012] (3-1) Start voice guidance based on flow volume loop data parameters, wait for steady breathing and perform real-time analysis and calculation;

[0013] (3-2) Provide voice guidance and determine whether the breathing wave is stable;

[0014] (3-3) Inhale forcefully and give voice instructions and execute;

[0015] (3-4) Exhale forcefully following voice instructions and executing.

[0016] Furthermore, the step (3-1) includes

[0017] (3-1-1) The test starts and voice guidance is given;

[0018] (3-1-2) Determine the change of expiratory flow rate within the preset time and process it;

[0019] (3-1-3) Real-time analysis and calculation of the inspiratory phase volume difference VT-in, expiratory phase volume difference VT-ex, average respiratory volume difference VT, respiratory frequency BF, minute respiratory volume difference MV and expiratory phase end volume FRC of each respiratory cycle.

[0020] Furthermore, the VT-in = the volume at the end of the inspiratory phase, i.e., the volume at the beginning of the subsequent expiratory phase - the volume at the beginning of the inspiratory phase; the VT-ex = the volume at the beginning of the expiratory phase - the volume at the end of the expiratory phase, i.e., the volume at the beginning of the inspiratory phase of the next breath; the VT = (VT-in + VT-ex) / 2; the BF = 60 / second; the MV shown = VT*BF; the FRC = the volume at the end of the expiratory phase.

[0021] Furthermore, the step (3-2) includes

[0022] (3-2-1) judging whether the current respiratory wave is a stable respiratory wave by determining whether the difference between the inspiratory phase volume, i.e., the difference between the inspiratory phase volume VT-in and the expiratory phase volume VT-ex, is within a preset volume error range;

[0023] (3-2-2) Determine whether the respiratory frequency BF corresponding to the current respiratory wave is within a preset range;

[0024] (3-2-3) Determine whether the tidal volume corresponding to the current respiratory wave is within a preset range;

[0025] (3-2-4) Determine whether there are 3 to 5 stable breathing waves at present.

[0026] Furthermore, the step (3-3) includes

[0027] (3-3-1) Analyze the current breathing wave in real time and provide corresponding voice guidance at the corresponding breathing phase;

[0028] (3-3-2) It is necessary to issue a command to take a deep breath in time at the end of exhalation;

[0029] (3-3-3) Use the test curve as a signal feedback to detect and evaluate the subject's cooperation and compliance, and provide corresponding voice guidance in a timely manner, and even control the lung function software to pause or restart;

[0030] (3-3-4) Determine whether the inhalation action is complete, the inhalation flow rate is less than 25 ml / s and the duration is greater than 0.5 seconds.

[0031] Furthermore, the step (3-4) includes

[0032] (3-4-1) After the inhalation is completed, the voice guidance of forceful exhalation is given in time and it is determined whether the exhalation process is continuous;

[0033] (3-4-2) Calculate the explosiveness index of this exhalation and the current exhalation time in real time;

[0034] (3-4-3) Determine whether the exhalation explosiveness index meets the quality control requirements and issue voice guidance in time according to the rhythm of the subject's exhalation action to help complete the exhalation action that meets the quality control requirements;

[0035] (3-4-4) Determine whether the current exhalation time exceeds 3 seconds and provide voice guidance;

[0036] (3-4-5) Determine whether the end-tidal quality control is met and provide voice guidance;

[0037] (3-4-6) End and exit the test.

[0038] The present invention also provides a system for checking pulmonary function and ventilation function through intelligent voice linkage, the improvement of which is that the system includes

[0039] A detection curve generating unit is used to obtain a flow signal obtained by a flow sensor monitoring a respiratory wave in real time, and process the flow signal to obtain a ventilation curve based on time and a flow-volume loop curve based on flow and volume;

[0040] A flow volume loop data acquisition unit is used to perform real-time cutting of the flow volume loop curve obtained by real-time monitoring of respiratory waves according to the flow voice guidance system to obtain the flow volume loop of each breath and obtain the flow volume loop data parameters by calculation;

[0041] The patient examination parameter generation unit is used to output corresponding breathing action instructions according to the flow volume loop data parameters, and at the same time provide voice guidance for breathing.

[0042] The above technical solution of the present invention has the following technical effects compared with the prior art:

[0043] The present invention provides a method for checking pulmonary function and ventilation function through intelligent voice linkage. Through intelligent voice guidance, based on the above-mentioned conditions of the patient, real-time analysis, calculation and processing of respiratory waves are performed, and corresponding instructions are issued in a timely manner to meet the respiratory movements required for the test, while automatically controlling the pulmonary function software.

[0044] The present invention improves the detection effect of lung function detection, increases the detection success rate, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 This is a flow chart of a method for checking pulmonary function and ventilation function through intelligent voice linkage according to an embodiment of the present invention;

[0047] Figure 2 It is a schematic diagram of a flow volume loop diagram in an embodiment of a method for checking pulmonary function and ventilation function through intelligent voice linkage of the present invention;

[0048] Figure 3 It is a schematic diagram of the expiratory part of the flow-volume loop in an embodiment of a method for checking pulmonary function and ventilation function through intelligent voice linkage of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 The embodiment of the present invention provides a method for checking pulmonary function and ventilation function through intelligent voice linkage, which is used to improve the detection effect of pulmonary function detection, increase the detection success rate, and reduce labor costs; the specific process includes:

[0051] The S1 flow sensor monitors the respiratory wave in real time to obtain the flow signal, and processes the flow signal to obtain the ventilation curve based on time and the flow-volume loop curve based on flow and volume;

[0052] The S2 voice guidance system cuts the flow volume loop curve obtained by real-time monitoring of respiratory waves in real time to obtain the flow volume loop of each breath and obtains the flow volume loop data parameters through calculation;

[0053] S3 outputs corresponding breathing action instructions according to the flow volume loop data parameters, and provides voice guidance for breathing at the same time.

[0054] S4 uses the data obtained from S1 and S2 as feedback to make timely corrections and adjustments to the voice guidance of S3, and even needs to manipulate the pulmonary function software (start, pause, restart, end calculation, etc.).

[0055] In the above embodiment, the pulmonary ventilation function instrument first processes the patient's real-time respiratory flow signal (Flow) and flow signal to obtain the patient's ventilation curve based on time (Time) (i.e., time-volume curve) and the patient's flow-volume loop curve based on flow and volume, thereby obtaining multiple stable respiratory waves from all respiratory waves of the patient's flow-volume loop curve;

[0056] The voice guidance system cuts the flow volume loop curve obtained by real-time monitoring of respiratory waves in real time, marking the inspiratory phase and expiratory phase. The cutting algorithm uses the zero point of the flow as the cutting point, with the inspiratory phase flow being positive and the expiratory phase flow being negative.

[0057] In the above embodiments, the pulmonary ventilation function test is the most common pulmonary function test item, and the test requires a flow sensor, a nose clip, a mouthpiece, and breathing through the mouth;

[0058] Record the relationship between the exhaled gas flow and the exhaled volume (i.e., integrate the exhaled flow), draw a flow-volume ring (X-axis is the exhaled volume Volume, Y-axis is the exhaled flow Flow) and the corresponding forced time vital capacity curve (X-axis is the forced expiratory time Time, Y-axis is the exhaled gas volume Volume) in the system, and calculate a series of corresponding parameters.

[0059] The entire examination requires the patient to follow the instructions and make explosive exhalation movements according to the doctor's requirements. The doctor needs to guide the patient to follow the instructions and breathe steadily to obtain a stable breathing wave at rest and obtain resting ventilation data (such as respiratory rate BF, tidal volume VT, minute ventilation MV);

[0060] Instruct the patient to exhale slowly to the residual volume position and obtain the expiratory reserve volume ERV, and to inhale forcefully to the total lung capacity position (the patient needs to inhale fully and quickly until he can no longer inhale. At this time, the forced inspiratory vital capacity FVCIN and the peak inspiratory flow PIF are calculated). Do not pause, and immediately instruct the patient to exhale explosively with the greatest possible force, and continue to exhale until he can no longer exhale and reaches the residual volume position.

[0061] Calculate the peak flow PEF, expiratory volume in the first second FEV1, forced expiratory volume FVCex, mid-expiratory flow MMEF, etc. of this forced exhalation.

[0062] Among them, the most common symptoms of patients are obstructive ventilatory dysfunction and restrictive ventilatory dysfunction. These diseases will affect the respiratory flow and exhaled volume, causing changes in the test curve and corresponding measurement parameters. During the examination, the doctor needs to issue appropriate instructions based on the patient's breathing situation, and the patient must cooperate closely according to the instructions and make corresponding breathing movements to perform respiratory testing.

[0063] like Figure 2 As shown, in the pulmonary ventilation function test, the main measurement parameters can be obtained through the flow volume loop diagram; in the flow volume loop diagram, the vertical axis is volume, the horizontal axis is flow, the upper half of the loop is the expiratory loop, and the lower half of the loop is the inspiratory loop. The highest value on the Y axis is the peak expiratory flow PEF data, and the highest value on the X axis is the forced vital capacity FVC data;

[0064] Among them, the flow volume loop includes flow volume expiratory loop, PEF, MEF75, MEF50, MEF25, MMEF, FVC, FEV1, PIF, FIV1 and MIF50; the main measurement parameters include the following:

[0065] PEF: Peak expiratory flow, which is measured by the peak velocity meter. It is an important parameter reflecting the obstruction of the large airways, and also reflects the expectoration capacity of the airways;

[0066] MEF75: The instantaneous expiratory flow rate when 75% of the forced vital capacity remains during forced exhalation. Our textbooks use V'75 to represent it, and the United States is accustomed to using FEF25 (the expiratory flow rate when 25% of the forced vital capacity is exhaled);

[0067] MEF50: The instantaneous expiratory flow when 50% of the forced vital capacity remains. It is expressed in V'50 in China and FEF50 in the United States.

[0068] MEF25: The instantaneous expiratory flow rate when 25% of the forced vital capacity is expressed in V'25 in China and FEF75 in the United States.

[0069] MMEF: mid-expiratory flow, which refers to the average flow rate when the forced exhalation is 25% to 75% of the forced vital capacity. It is the main indicator for judging airway obstruction (especially small airway lesions);

[0070] FVC: forced vital capacity, which refers to the maximum forced expiratory vital capacity measured by taking a deep breath to the total lung capacity and then exhaling forcefully and quickly to the residual air position;

[0071] FEV1: Exhaled volume in one second, refers to the amount of gas exhaled forcefully in the first second; it is both a measurement of capacity and an average flow measurement within one second, and is the main indicator of impaired lung function. Airway obstruction is often expressed in one-second rate (FEV1 / FVC% or FEV1 / VCmax%). The above FEV1 is a comprehensive indicator that reflects airway viscosity resistance and partial peripheral compliance, so it becomes the main observation indicator for bronchial reactivity examination;

[0072] PIF: peak inspiratory flow;

[0073] FIV1: Inspiratory volume in one second;

[0074] MIF 50: The instantaneous inspiratory flow at 50% of forced vital capacity, which can reflect the status of the upper airway.

[0075] like Figure 3 As shown, in the above scheme, during the test, the exhalation part of the flow volume loop is divided into three stages:

[0076] The first stage is the volume acceleration process, and all subjects can reach the peak flow in a very short time (except patients with respiratory muscle paralysis), so the steep rising curve means that the subjects have fully cooperated; the second stage requires the subjects to repeat the check to confirm the position of the maximum flow limit; the last stage is the end of exhalation, which has nothing to do with the degree of effort and reflects the information of the small airways. If exhalation stops too early, the end-expiratory curve can be seen turning downward.

[0077] The quality control of the first stage can also be described by extrapolated volume (EV). The normal EV / FVC is <5%. The smaller the parameter, the better the subject's explosive exhalation action is.

[0078] Good quality control should be that the detection curve has good repeatability, and at least three stable flow-volume loop curves corresponding to at least three stable respiratory waves are obtained based on the patient's flow-volume loop curve, where the difference between the maximum FVC and FEV1 does not exceed 5% or 150ml, and the difference between the maximum FVC and the maximum PEF does not exceed 40L / min.

[0079] Example:

[0080] Step 1: After the doctor clips the nose clip on the patient, he / she sits next to the machine. The test starts and voice guidance is given. Press the "Start" button and a voice is heard saying "Please hold the mouthpiece and breathe through your mouth";

[0081] The expiratory flow rate change is determined within the preset time and processed. If no expiratory flow rate change is detected within 2 seconds, that is, there is no respiratory wave, a voice is issued saying "Don't hold your breath, relax, and breathe through your mouth";

[0082] When a respiratory wave is found, that is, after obtaining an inspiratory phase and an expiratory phase, the first respiratory wave is discarded (because the first wave does not necessarily start from zero), and the respiratory wave is recorded again. When the second breath appears, the data of this respiratory wave is calculated, including the inspiratory tidal volume VT-in, the expiratory tidal volume VT-ex, the average tidal volume VT, the expiratory frequency BF and the minute ventilation MV, as well as the functional residual position FRC of this breath. The algorithm is as follows:

[0083] VT-in = the volume at the end of the inspiratory phase, i.e. the volume at the beginning of the expiratory phase – the volume at the beginning of the inspiratory phase;

[0084] VT-ex = volume at the beginning of the expiratory phase – volume at the end of the expiratory phase, i.e. the volume at the beginning of the inspiration phase of the next breath;

[0085] VT=(VT-in+VT-ex) / 2;

[0086] BF = 60 / (time of end of expiratory phase, in seconds - time of start of inspiratory phase, in seconds);

[0087] MV = VT * BF;

[0088] FRC = volume at the end of expiratory phase;

[0089] Step 2: Determine whether the current respiratory wave is a stable respiratory wave by checking whether the difference between the inspiratory phase volume, i.e., the difference between the VT-in and expiratory phase volume, VT-ex, is within the preset volume error range;

[0090] If VT-in is close to VT-ex, a slow voice "Steady breathing, very good" is issued; wait for the second breathing wave behind;

[0091] If the difference between VT-in and VT-in is large, that is, when the respiratory wave drifts up or down, the current respiratory wave is judged to be unstable and a respiratory leakage warning message is generated, and a voice "Close the corners of your mouth tightly, do not leak air" is issued; when the breathing returns to stable state, the "Restart" button in the pulmonary function system is automatically triggered, and the previous curve and data are automatically discarded;

[0092] Step 3: When the second stable breathing wave appears, the above values ​​are calculated again. When BF is not between 10-20, the breathing frequency BF corresponding to the current breathing wave exceeds the preset frequency error range, and a slow breathing prompt message is generated; a voice "Relax, don't breathe too fast" is issued. When MV>200% of the expected value, a slow breathing prompt message is generated, and a voice "Relax, don't breathe too fast" is issued, and no other voice is issued.

[0093] Step 4: When the third wave appears, calculate the above parameters again, and the sound production logic is the same as above.

[0094] Step 5: When the fourth wave appears, calculate the current BF and MV again, and the sounding logic is the same as above. Add a logic: if there is no sound before, then say "very good, keep breathing steadily";

[0095] Step 6: When the fifth wave appears, start commanding during the steady exhalation phase: "Start breathing in now, breathe in deeply!" If the patient does not listen to the command and does not take a deep breath, you need to give this command again when taking the next breath. If the patient still does not pay attention when taking the next breath, you need to automatically press the "pause button" in the pulmonary function test system and send "Please listen to the command! When you are asked to breathe in deeply, you must breathe in deeply in one breath. Now we will start again." Jump back to step 6.

[0096] Step 7: When the patient follows the command and makes a continuous inhalation, you need to say "Inhale!" (long sound), otherwise go back to step 6;

[0097] Step 8: When the inspiratory flow rate is lower than 25ml / s, immediately and quickly say "Exhale explosively! Blow--! (long sound)";

[0098] Step 9: After detecting the exhalation action, wait for the peak flow PEF to appear, calculate the time from the start of exhalation to the exhalation peak, that is, the peak time, calculate the extrapolated volume, and determine whether the exhalation explosiveness meets the quality control requirements. If it does, send "Exhale hard! Be explosive!" and then return to step 9. Determine whether the exhalation explosiveness index meets the quality control and send encouraging voice guidance in time according to the rhythm of the subject's exhalation action to help complete the exhalation action that better meets the quality control requirements.

[0099] Step 10: When the exhalation exceeds 3 seconds, send "Keep blowing!" and detect the exhalation flow rate at the same time. Once the exhalation flow rate is lower than 25ml / s, start calculating the duration. If the duration is about 500ms (i.e., check the end-of-expiration quality control), actively send "Breathe in hard!"; if the conditions are not met and the patient actively inhales, send "You haven't finished blowing. Listen to the instructions next time. Inhale after blowing out." Then go to the position of the 5th wave and calculate the number of failures. If the number of failures exceeds 3, the "Stop" button will be automatically pressed, and the message "Please listen to the instructions, take a break, and we will try again" will be sent.

[0100] Step 11: When the patient follows the command and takes a deep breath, the "Stop" button is automatically triggered, completing the test and announcing "Very good! I have completed the test. Let's take a break."

[0101] In the above embodiment, the flow signal is analyzed in real time as data drive for subsequent voice guidance; the flow signal must be obtained from a pulmonary function instrument, otherwise if the flow signal is inaccurate, the respiratory state cannot be accurately determined;

[0102] The above control method can issue voice guidance in time according to the patient's breathing movements, and has strong real-time performance; the voice guidance system not only issues voice instructions, but also controls the pulmonary function and ventilation function examination system.

[0103] In summary, the control method for pulmonary ventilation function examination provided in the embodiment of the present invention can be based on the pulmonary ventilation function instrument, on which a system algorithm and a speaker are added, and at the same time, the system interface of the pulmonary ventilation function instrument needs to be manipulated;

[0104] Therefore, the present invention can issue voice according to the patient's specific breathing movements, and the patient's compliance will be better; at the same time, the pulmonary ventilation function detection system interface can be controlled to fully link and ensure the success rate of voice-guided detection.

[0105] It should be noted that, although the various steps in the flowchart are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowchart may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0106] The embodiment of the present invention further provides a system for checking pulmonary function and ventilation function through intelligent voice linkage, which is used to implement the aforementioned method for checking pulmonary function and ventilation function through intelligent voice linkage, and the checking system includes:

[0107] A detection curve generating unit is used to obtain a flow signal obtained by a flow sensor monitoring a respiratory wave in real time, and process the flow signal to obtain a ventilation curve based on time and a flow-volume loop curve based on flow and volume;

[0108] A flow volume loop data acquisition unit is used to perform real-time cutting of the flow volume loop curve obtained by real-time monitoring of respiratory waves according to the flow voice guidance system to obtain the flow volume loop of each breath and obtain the flow volume loop data parameters by calculation;

[0109] The patient examination parameter generation unit is used to output corresponding breathing action instructions according to the flow volume loop data parameters, and at the same time provide voice guidance for breathing and timely control the pulmonary function examination software according to the specific situation of the subject. (Control of pulmonary function examination includes starting, pausing, restarting, and ending calculations, etc.).

[0110] For the specific limitations of the above-mentioned device, please refer to the limitations of the method above, which will not be repeated here.

[0111] It should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for checking pulmonary function and ventilation function through intelligent voice linkage, characterized in that: include: (1) The flow sensor monitors the respiratory wave in real time to obtain the flow signal, and processes the flow signal to obtain the time-based ventilation curve and the flow-volume loop curve based on flow and volume; (2) The voice guidance system cuts the flow-volume loop curve obtained by real-time monitoring of respiratory waves in real time to obtain the flow-volume loop of each breath and obtains the flow-volume loop data parameters through calculation; (3) Output corresponding breathing action instructions according to the flow volume loop data parameters, and provide voice guidance for breathing; (3-1) Start voice guidance based on flow volume loop data parameters, wait for steady breathing and perform real-time analysis and calculation; (3-1-1) The test starts and voice guidance is given; (3-1-2) Determine the change in expiratory flow rate within the preset time and process it; (3-1-3) Real-time analysis and calculation of the inspiratory volume difference VT-in, expiratory volume difference VT-ex, average respiratory volume difference VT, respiratory frequency BF, respiratory volume difference per minute MV and expiratory volume end FRC of each respiratory cycle; (3-2) Provide voice guidance and determine whether the breathing wave is stable; (3-2-1) Determine whether the current respiratory wave is a stable respiratory wave by checking whether the difference between the inspiratory phase volume, i.e., VT-in, and the expiratory phase volume, VT-ex, is within the preset volume error range; (3-2-2) Determine whether the respiratory frequency BF corresponding to the current respiratory wave is within the preset range; (3-2-3) Determine whether the tidal volume corresponding to the current respiratory wave is within the preset range; (3-2-4) Determine whether there are 3 to 5 stable breathing waves; (3-3) Inhale forcefully and follow the voice instructions; (3-3-1) Analyze the current breathing wave in real time and provide corresponding voice guidance at the corresponding breathing phase; (3-3-2) It is necessary to issue a command to take a deep breath in time at the end of exhalation; (3-3-3) Use the test curve as a signal feedback to detect and evaluate the subject's cooperation and compliance, and provide corresponding voice guidance in a timely manner; (3-3-4) Determine whether the inhalation action is completed; (3-4) Exhale forcefully and follow the voice instructions; (3-4-1) After the inhalation is detected, the voice guidance of forceful exhalation is issued in time and whether the exhalation process is continuous; (3-4-2) Calculate the explosiveness index of this exhalation and the current exhalation time in real time; (3-4-3) Determine whether the exhalation explosiveness index meets the quality control requirements and issue voice guidance in time according to the rhythm of the subject's exhalation action to help the subject complete the exhalation action that better meets the quality control requirements; (3-4-4) Determine whether the current exhalation time exceeds 3 seconds and provide voice guidance; (3-4-5) Determine whether the end-of-expiratory quality control is met and provide voice guidance; (3-4-6) End and exit the test.

2. A method for checking pulmonary function and ventilation function through intelligent voice linkage according to claim 1, characterized in that: The flow volume loop in step (2) includes a flow volume expiratory loop, PEF, MEF75, MEF50, MEF25, MMEF, FVC, FEV1, PIF, FIV1 and MIF50; Among them, PEF is the maximum expiratory peak flow PEF, MEF75 is the instantaneous expiratory flow at 75% of the remaining forced vital capacity, MEF50 is the instantaneous expiratory flow at 50% of the remaining forced vital capacity, MEF25 is the instantaneous expiratory flow at 25% of the remaining forced vital capacity, MMEF is the mid-term expiratory flow, FVC is the forced vital capacity, FEV1 is the expiratory volume in one second, PIF is the maximum inspiratory peak flow, FIV1 is the inspiratory volume in one second and MIF50 is the instantaneous inspiratory flow at 50% of the forced vital capacity.

3. The method for checking pulmonary function and ventilation function through intelligent voice linkage according to claim 1, characterized in that: The VT-in = the volume at the end of the inspiratory phase, i.e. the volume at the beginning of the subsequent expiratory phase – the volume at the beginning of the inspiratory phase; the VT-ex = the volume at the beginning of the expiratory phase – the volume at the end of the expiratory phase, i.e. the volume at the beginning of the inspiratory phase of the next breath; the VT = (VT-in + VT-ex) / 2; the BF = 60 / second; the MV shown = VT * BF; the FRC = the volume at the end of the expiratory phase.

4. The method for checking pulmonary function and ventilation function through intelligent voice linkage according to claim 1, characterized in that: Also included is a system for checking lung function and ventilation function through intelligent voice linkage, the system comprising A detection curve generating unit is used to obtain a flow signal obtained by a flow sensor monitoring a respiratory wave in real time, and process the flow signal to obtain a ventilation curve based on time and a flow-volume loop curve based on flow and volume; A flow volume loop data acquisition unit is used to perform real-time cutting of the flow volume loop curve obtained by real-time monitoring of respiratory waves according to the flow voice guidance system to obtain the flow volume loop of each breath and obtain the flow volume loop data parameters by calculation; The patient examination parameter generation unit is used to output corresponding breathing action instructions according to the flow volume loop data parameters, and at the same time provide voice guidance for breathing and timely control of the pulmonary function examination software according to the subject's condition.

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