A method, apparatus, system, and medium for flow rate compensation of a ventilator

Abstract

The application discloses a kind of ventilator flow rate compensation method, device, system and medium, method includes: obtaining the end-expiratory volume of ventilator, whether end-expiratory volume is judged to zero;When end-expiratory volume is not zero, confirm whether flow rate baseline is offset zero point;When the flow rate baseline is offset zero point, inhibit leakage factor in leakage compensation strategy, and flow rate AD value is compensated according to drift compensation strategy until flow rate baseline is zero;The inhibited leakage factor is recovered, and flow rate is compensated according to the leakage compensation strategy based on the recovered leakage factor, until the end-expiratory volume is zero.Through when flow rate baseline is offset zero point, first inhibit leakage compensation and preferentially through drift compensation, flow rate baseline is pulled back to zero point, after flow rate baseline is zero, start leakage compensation mechanism again and make inhaled and exhaled compensation equal, so that accurate compensation of flow rate offset can be carried out when flow rate baseline exists upward or downward offset, improve the accuracy of ventilator flow rate monitoring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a flow rate compensation method, device, system and medium of a ventilator. BACKGROUND

[0002] The emergency transport ventilator is a medical device for emergency ventilation of patients with respiratory failure, which is characterized by integrated airway design, simple and fast use, small size, easy to carry and the like, and is often used in long-distance transport of ambulances, hospital transport and field emergency rescue.

[0003] The emergency transport ventilator usually uses a differential pressure flow sensor to monitor the flow rate signal. The differential pressure flow sensor measures the pressure difference signal generated before and after the airflow passing through a fixed aperture. The pressure difference signal is transmitted to a 16-bit ADS1118 chip, which can convert the pressure difference into a voltage difference and then convert the voltage difference into an AD value. The AD value is the value after converting the analog quantity (such as current or voltage) into a digital quantity, thereby becoming a digital signal that can be used by a machine. After calibration with a standard flow device, the standard flow rate and the AD value can be one-to-one corresponding, forming a calibration data table.

[0004] The fixed aperture flow sensor often shows low AD accuracy at a small flow rate, i.e., the AD value corresponding to 1L / min is too small. The hardware for collecting AD values itself may have a zero drift, so it is usually necessary to compensate for the zero flow rate offset. In addition, the ventilator may also have a leakage, and both leakage and zero drift can cause flow rate offset, so a corresponding method is needed to compensate for the flow rate.

[0005] However, the existing flow rate compensation method cannot distinguish which compensation method should be used under different working conditions, for example, it may misidentify based on the offset condition when there is no leakage, triggering the leakage compensation mechanism to work, etc., making it difficult to compensate for the flow rate and reducing the accuracy of the flow rate monitoring of the ventilator. SUMMARY

[0006] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a flow rate compensation method, device, system and medium of a ventilator, which aims to accurately compensate for different flow rate offset scenarios and improve the accuracy of the flow rate monitoring of the ventilator.

[0007] The technical solution of the present application is as follows:

[0008] A flow rate compensation method of a ventilator, comprising:

[0009] acquiring an end-expiratory volume of the ventilator and determining whether the end-expiratory volume is zeroed;

[0010] when the end-expiratory volume is not zeroed, determining whether a flow rate baseline is offset from zero.

[0011] when the flow rate baseline is offset from the zero point, suppressing a leakage factor in a leakage compensation strategy, and compensating flow rate AD values according to a drift compensation strategy until the flow rate baseline is returned to zero;

[0012] restoring the suppressed leakage factor, and compensating flow rate according to the leakage compensation strategy based on the restored leakage factor until the end-tidal volume is returned to zero.

[0013] In one embodiment, the acquiring the end-tidal volume of the ventilator, and determining whether the end-tidal volume is returned to zero, comprises:

[0014] acquiring an inhalation tidal volume and an exhalation tidal volume of the ventilator;

[0015] calculating the end-tidal volume according to the inhalation tidal volume and the exhalation tidal volume, and determining whether the end-tidal volume is returned to zero.

[0016] In one embodiment, the end-tidal volume is specifically:

[0017]

[0018] wherein, is the end-tidal volume, and are the inhalation tidal volume and the exhalation tidal volume, respectively.

[0019] In one embodiment, when the end-tidal volume is not returned to zero, determining whether the flow rate baseline is offset from the zero point, specifically comprises:

[0020] calculating an average end-tidal flow rate of the ventilator when the end-tidal volume is not returned to zero;

[0021] if the average end-tidal flow rate is not zero, then determining that the flow rate baseline is offset from the zero point.

[0022] In one embodiment, the suppressing the leakage factor in the leakage compensation strategy, specifically refers to:

[0023] subtracting a specified value from an initial leakage factor in the leakage compensation strategy.

[0024] In one embodiment, the compensating flow rate AD values according to the drift compensation strategy until the flow rate baseline is returned to zero, specifically comprises:

[0025] dynamically adjusting the offset of flow rate AD values according to the following formula based on the end-tidal volume until the average end-tidal flow rate is zero,

[0026]

[0027] wherein, AD is the flow rate AD value, is a flow rate AD value after compensation, is an offset of the flow rate AD value, ΔAD is an offset of the adjusted flow rate AD value, is an end-tidal volume, is an adjustment coefficient.

[0028] In one embodiment, the average end-tidal flow rate is calculated by the following steps:

[0029] When the end-tidal flow rate is greater than a first threshold value or when the flow rate is greater than a second threshold value and lasts for a specified duration, it is recorded as a start time;

[0030] The cumulative value of the flow rate between the start time and a specified end-tidal end time is counted;

[0031] According to the cumulative value of the flow rate and the counting duration, the average end-tidal flow rate is obtained.

[0032] In one embodiment, the recovery of the suppressed leakage factor is specifically:

[0033] According to the specified numerical value, the current suppressed leakage factor is recovered to the initial leakage factor.

[0034] A flow rate compensation device of a ventilator, comprising:

[0035] An offset confirmation module is configured to obtain an end-tidal volume of the ventilator, determine whether the end-tidal volume is zeroed, and confirm whether a flow rate baseline is offset from zero when the end-tidal volume is not zeroed.

[0036] A drift compensation module is configured to suppress a leakage factor in a leakage compensation strategy when the flow rate baseline is offset from zero, and compensate a flow rate AD value according to a drift compensation strategy until the flow rate baseline is zeroed.

[0037] A leakage compensation module is configured to recover the suppressed leakage factor, compensate the flow rate according to the leakage compensation strategy based on the recovered leakage factor, and zero the end-tidal volume.

[0038] A flow rate compensation system of a ventilator, the system comprising at least one processor; and,

[0039] A memory in communication connection with the at least one processor; wherein,

[0040] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the flow rate compensation method of the ventilator.

[0041] The non-volatile computer readable storage medium stores computer executable instructions, which, when executed by one or more processors, can cause the one or more processors to perform the flow rate compensation method of the ventilator.

[0042] Beneficial effects: The ventilator flow rate compensation method, device, system and medium are disclosed, compared with the prior art, the ventilator flow rate compensation method, device, system and medium, when the flow rate baseline deviates from the zero point, the leak compensation is first inhibited, and the flow rate baseline is pulled back to the zero point by the drift compensation, and after the flow rate baseline is returned to zero, the leak compensation mechanism is started to equalize the inhalation and exhalation compensation, so that accurate compensation of the flow rate deviation can be performed when the flow rate baseline deviates upward or downward, and the accuracy of the ventilator flow rate monitoring is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0044] Figure 1 A flow chart of the ventilator flow rate compensation method provided by the embodiment of the present application is provided.

[0045] Figure 2 A functional module schematic diagram of the ventilator flow rate compensation device provided by the embodiment of the present application is provided.

[0046] Figure 3 A hardware structure schematic diagram of the ventilator flow rate compensation system provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0047] To make the purpose, technical scheme and effect of the present application clearer and more explicit, the present application will be further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The embodiments of the present application will be introduced below in conjunction with the drawings.

[0048] Please refer to Figure 1 , Figure 1 A flow chart of the ventilator flow rate compensation method provided by the embodiment of the present application is provided. As shown in Figure 1 , the method specifically includes the following steps:

[0049] S100, acquiring the end-expiratory volume of the ventilator, and judging whether the end-expiratory volume is returned to zero.

[0050] S200, when the end-expiratory volume is not returned to zero, confirming whether the flow rate baseline deviates from the zero point.

[0051] In the embodiment, when the leakage of the emergency transport ventilator exists, the zero drift automatic compensation function is implemented. The information of the flow rate baseline offset is needed to be obtained. The end-expiratory volume is used to determine the offset of the end-expiratory flow rate baseline. The end-expiratory volume of the ventilator is obtained. If the value cannot be zero, it is determined whether the flow rate baseline is offset from zero. Then, the identification and judgment basis for automatic compensation is provided.

[0052] In one embodiment, step S100 comprises:

[0053] The inhalation tidal volume and the exhalation tidal volume of the ventilator are collected.

[0054] The end-expiratory volume is calculated according to the inhalation tidal volume and the exhalation tidal volume, and whether the end-expiratory volume is zero is determined.

[0055] In the embodiment, the end-expiratory volume is calculated by collecting the inhalation tidal volume and the exhalation tidal volume of the ventilator. The end-expiratory volume is specifically:

[0056]

[0057] Wherein, is the end-expiratory volume, and are the inhalation tidal volume and the exhalation tidal volume, respectively. When the end-expiratory volume is not zero, that is, when the inhalation and exhalation are not equal, it is further determined whether the flow rate baseline of the ventilator is offset.

[0058] Further, step S200 is specifically:

[0059] When the end-expiratory volume is not zero, the average end-expiratory flow rate of the ventilator is calculated.

[0060] If the average end-expiratory flow rate is not zero, it is confirmed that the flow rate baseline is offset from zero.

[0061] In the embodiment, when the end-expiratory volume is not zero, it is determined whether the flow rate baseline is zero by calculating the average end-expiratory flow rate of the ventilator. If the average end-expiratory flow rate is zero or infinitely close to zero, it is confirmed that the flow rate baseline is not offset. Otherwise, if the average end-expiratory flow rate is not zero, it is confirmed that the flow rate baseline is offset from zero, and accurate compensation for the flow rate offset is needed.

[0062] S300, when the flow rate baseline is offset from zero, the leakage factor in the leakage compensation strategy is inhibited, and the flow rate AD value is compensated according to the drift compensation strategy until the flow rate baseline is zero.

[0063] In the embodiment, when the flow rate baseline is offset from zero, there can be two cases. One is that the baseline is offset downward. At this time, the end-expiratory volume is a negative number. Since if there is a leakage, its effect will inevitably make the inhalation greater than the exhalation, that is, , the leakage factor cannot be negative, so it can be concluded that there must be a negative drift of the flow rate AD value; the other is the upward shift of the baseline, at this time the end-tidal volume Is a positive number, that is, the inhalation is greater than the exhalation, From the above, it is impossible to distinguish whether it is caused by the positive drift of the flow rate AD value or the existence of leakage, so it is easy to be mistakenly identified as the existence of leakage, and the leakage compensation mechanism will be effective. In order to avoid the mistaken call of the leakage compensation strategy for compensation under such working conditions, this embodiment will first suppress the leakage compensation and give priority to compensating the flow rate AD value regardless of whether the flow rate baseline is upward or downward offset. That is, while suppressing the leakage factor in the leakage compensation strategy, the drift compensation strategy is called to compensate the flow rate AD value until the flow rate baseline returns to zero. In other words, the compensation adjustment here is not based on The ultimate goal is to reduce the flow rate to zero, and the AD drift compensation solution is preferably used to directly compensate to ensure that the flow rate baseline is pulled back to zero. Among them, the leakage compensation strategy and the drift compensation strategy can both adopt existing leakage compensation mechanisms and zero drift compensation mechanisms, which are not limited in this embodiment.

[0064] In one embodiment, the leakage suppression factor in the leakage compensation strategy specifically refers to:

[0065] Subtract the specified value from the initial leakage factor in the leakage compensation strategy.

[0066] In this embodiment, the method of suppressing leakage compensation is to subtract a specified value from the initial leakage factor in the leakage compensation strategy, such as subtracting 0.5 or other values ​​from the leakage factor of the current settlement, which is not limited in this embodiment.

[0067] In one embodiment, compensating the flow rate AD value according to the drift compensation strategy until the flow rate baseline returns to zero specifically includes:

[0068] According to the end-tidal volume, the offset of the flow rate AD value is dynamically adjusted according to the following formula until the average end-tidal flow rate is zero.

[0069]

[0070] Among them, AD is the flow rate AD value, is the flow rate AD value after compensation, is the offset of the flow rate AD value, ΔAD is the offset of the adjusted flow rate AD value, is the end-tidal volume, is the adjustment factor.

[0071] In this embodiment, the method of pulling back the flow rate baseline is to adjust the offset of the flow rate AD value, i.e. ΔAD, and the judgment standard of whether the flow rate baseline is zeroed is whether the average end-expiratory flow rate is close to zero, so this embodiment adjusts the positive and negative compensation of the flow rate AD value according to the end-expiratory volume , and dynamically adjusts the offset of the flow rate AD value. The adjustment here does not take the reduction to zero as the final goal, but takes the average end-expiratory flow rate as the goal, so as to preferentially ensure that the flow rate baseline is pulled back to zero.

[0072] Specifically, the average end-expiratory flow rate is calculated by the following steps:

[0073] When the end-expiratory flow rate is greater than a first threshold value or when the flow rate is greater than a second threshold value and lasts for a specified duration, the starting moment is recorded;

[0074] The cumulative value of the flow rate between the starting moment and a specified end-expiratory ending moment is counted;

[0075] The average end-expiratory flow rate is obtained according to the cumulative value of the flow rate and the counting duration.

[0076] In this embodiment, in order to calculate the tidal volume at the fast stable stage of exhalation, when the end-expiratory flow rate is greater than a first threshold value, the first threshold value is a very small negative value, for example, the end-expiratory flow rate starts to be greater than -0.5 L / min, or when the flow rate is greater than a second threshold value and the flow rate state lasts for a specified duration, the starting moment is recorded, the second threshold value is a smaller negative value and the specified duration can be within 0.5 s, for example, when the flow rate is greater than -3 L / min and the flow rate state has been waiting for 200 ms, the calculation starts, the cumulative value of the flow rate between the starting moment and a specified end-expiratory ending moment is counted, and the calculation is performed in the parameter phase, and the end-expiratory ending moment can be the time when the exhalation phase ends, and then the average end-expiratory flow rate of the statistical time period is calculated according to the cumulative value of the flow rate and the counting duration , wherein is the counting duration between the starting moment and the specified end-expiratory ending moment, is the average end-expiratory flow rate.

[0077] S400, restore the suppressed leak factor, compensate the flow rate according to the leak compensation strategy based on the restored leak factor, and zero the end-expiratory volume.

[0078] ​In this embodiment, by preferentially compensating the flow rate AD value, when the compensation reaches FlowMean=0, i.e., the flow rate baseline returns to zero, and the inhalation and exhalation are still not equal, the inhibited leakage factor is opened, the inhibited leakage factor is recovered, and specifically, the current inhibited leakage factor is recovered to the initial leakage factor according to the specified value subtracted during the inhibition. The leakage compensation method is used to compensate the flow rate baseline based on the recovered leakage factor until the end-expiratory volume is zero, i.e., the inhalation and exhalation are compensated to be equal by the leakage compensation.

[0079] Due to the general flow rate baseline deviation, if the deviation is downward, the leakage factor cannot be negative, and thus there is a negative drift of the flow rate AD, and thus the flow rate AD value can be compensated normally; however, if the flow rate deviates upward, the inhalation is greater than the exhalation, which is easily misidentified as leakage, and the leakage compensation mechanism will work. In order to avoid the miscompensation of the leakage compensation under this working condition, the flow rate compensation method provided in this embodiment preferentially ensures that the flow rate baseline is pulled back to zero, i.e., the leakage compensation is inhibited while the flow rate AD value is compensated, and when the flow rate baseline is satisfied, the end-expiratory volume is still not zero, the leakage factor is recovered to the value calculated normally, and finally the inhalation and exhalation are compensated to be equal by the leakage compensation model. Regardless of whether the flow rate baseline deviates upward or downward, accurate compensation of the flow rate deviation can be performed, the leakage compensation mechanism is not called to perform miscompensation when no leakage occurs, and the flow rate compensation efficiency and the accuracy of the ventilator flow rate monitoring are effectively improved.

[0080] Another embodiment of the present application provides a flow rate compensation device of a ventilator, as shown in the figure. Figure 2 The device 1 comprises:

[0081] The deviation confirmation module 11 is configured to acquire the end-expiratory volume of the ventilator and determine whether the end-expiratory volume is zero; when the end-expiratory volume is not zero, it is determined whether the flow rate baseline deviates from zero.

[0082] The drift compensation module 12 is configured to, when the flow rate baseline deviates from zero, inhibit the leakage factor in the leakage compensation strategy and compensate the flow rate AD value according to the drift compensation strategy until the flow rate baseline is zero.

[0083] The leakage compensation module 13 is configured to recover the inhibited leakage factor and compensate the flow rate based on the recovered leakage factor according to the leakage compensation strategy until the end-expiratory volume is zero.

[0084] The module referred to in the present application refers to a series of computer program instruction segments capable of completing a specific function, and is more suitable for describing the execution process of the flow rate compensation of the ventilator than the program. The specific implementation of each module is described in the above-mentioned corresponding method embodiment, and will not be described here.

[0085] Another embodiment of the present application provides a flow rate compensation system of a breathing machine, as shown in Figure 3 The system 10 includes:

[0086] One or more processors 110 and a memory 120, Figure 3 In some embodiments, the processor 110 and the memory 120 are connected through a bus or other means, Figure 3 In some embodiments, the processor 110 and the memory 120 are connected through a bus or other means.

[0087] The processor 110 is configured to implement various control logic of the system 10. The processor 110 can be implemented by one or more general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or any combination thereof. The processor 110 can also be implemented as a combination of the above, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0088] The memory 120 is a non-transitory computer-readable storage medium configured to store non-transitory software programs, non-transitory computer-executable instructions, and modules, such as program instructions corresponding to the flow rate compensation method of the breathing machine in the embodiments of the present application. The processor 110 executes various functions and data processing of the system 10 by running the non-transitory software programs, instructions, and modules stored in the memory 120, i.e., implements the flow rate compensation method of the breathing machine in the above method embodiments.

[0089] The memory 120 can include a program storage area and a data storage area. The program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the system 10, etc. In addition, the memory 120 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some embodiments, the memory 120 can optionally include a memory remotely disposed relative to the processor 110, which can be connected to the system 10 through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0090] One or more units are stored in the memory 120 and executed by the one or more processors 110 to implement the flow rate compensation method of the breathing machine in any of the above method embodiments, such as the above-describedFigure 1 the method steps S100-S400 in the method of

[0091] The embodiment of the present application provides a nonvolatile computer readable storage medium, and the computer readable storage medium stores computer executable instructions, the computer executable instructions are executed by one or more processors, for example, the computer executable instructions are executed by the above described Figure 1 the method steps S100-S400 in the method of

[0092] By way of example, nonvolatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), as external cache memory. By way of illustration, RAM can be available at many forms of RAM such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DRRAM). The disclosed memory components or memory of the operational environment described herein are intended to comprise one or more of these and / or any other suitable types of memory.

[0093] To sum up, in the flow rate compensation method, device, system and medium of a ventilator, the method comprises the following steps: acquiring an end-expiratory volume of the ventilator, judging whether the end-expiratory volume is zeroed, confirming whether a flow rate baseline deviates from zero when the end-expiratory volume does not zero, inhibiting a leakage factor in a leakage compensation strategy when the flow rate baseline deviates from zero, and compensating a flow rate AD value according to a drift compensation strategy until the flow rate baseline is zeroed, recovering the inhibited leakage factor, and compensating the flow rate according to the leakage compensation strategy based on the recovered leakage factor until the end-expiratory volume is zeroed. When the flow rate baseline deviates from zero, the leakage compensation is inhibited first, and the flow rate baseline is pulled back to zero by the drift compensation first, and then the leakage compensation mechanism is started after the flow rate baseline is zeroed to compensate the inhaled and exhaled compensation to be equal, so that accurate compensation of flow rate deviation can be performed when the flow rate baseline deviates upward or downward, and the accuracy of flow rate monitoring of the ventilator is improved.

[0094] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing relevant hardware (such as a processor, a controller, etc.) through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned method embodiments can be included. The storage medium can be a memory, a disk, a floppy disk, a flash memory, an optical storage, etc.

[0095] It should be understood that the application is not limited to the above examples, and those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the application.

Claims

1. A method of flow rate compensation for a breathing machine, the method comprising: The method comprises: acquiring an end-expiratory volume of the ventilator, and determining whether the end-expiratory volume is zeroed; when the end-expiratory volume is not zeroed, determining whether a flow rate baseline is offset from zero; when the flow rate baseline is offset from zero, suppressing a leakage factor in a leakage compensation strategy, and compensating a flow rate AD value according to a drift compensation strategy until the flow rate baseline is zeroed; recovering the suppressed leakage factor, and compensating the flow rate according to the leakage compensation strategy based on the recovered leakage factor until the end-expiratory volume is zeroed.

2. The flow rate compensation method of a respirator according to claim 1, wherein, The acquiring of the end-expiratory volume of the ventilator and the determining of whether the end-expiratory volume is zeroed comprises: collecting an inhalation tidal volume and an exhalation tidal volume of the ventilator; calculating the end-expiratory volume according to the inhalation tidal volume and the exhalation tidal volume, and determining whether the end-expiratory volume is zeroed.

3. The flow rate compensation method of a respirator according to claim 1, wherein, The determining of whether the flow rate baseline is offset from zero when the end-expiratory volume is not zeroed specifically comprises: calculating an average end-expiratory flow rate of the ventilator when the end-expiratory volume is not zeroed; if the average end-expiratory flow rate is not zero, determining that the flow rate baseline is offset from zero.

4. The flow rate compensation method of a respirator according to claim 1, wherein, The suppressing of the leakage factor in the leakage compensation strategy specifically comprises: subtracting a specified value from an initial leakage factor in the leakage compensation strategy.

5. The flow rate compensation method of a ventilator according to claim 1, wherein, The compensating of the flow rate AD value according to the drift compensation strategy until the flow rate baseline is zeroed specifically comprises: The offset of the flow rate AD value is dynamically adjusted according to the end-expiratory volume by the following equation until the average end-expiratory flow rate is zero, wherein AD is a flow rate AD value, is a compensated flow rate AD value, is an offset of the flow rate AD value, ΔAD is an offset of the adjusted flow rate AD value, is an end tidal volume, is an adjustment coefficient.

6. The flow rate compensation method of a respirator according to claim 3 or 5, wherein, The average end-expiratory flow rate is calculated by the following steps: recording a start time when the end-expiratory flow rate is greater than a first threshold value or when the flow rate is greater than a second threshold value and lasts for a specified duration; statistically calculating a flow rate cumulative value between the start time and a specified end-expiratory end time; obtaining the average end-expiratory flow rate according to the flow rate cumulative value and a statistical duration.

7. The flow rate compensation method of a respirator according to claim 4, wherein, The recovering of the suppressed leakage factor specifically comprises: recovering the current suppressed leakage factor to an initial leakage factor according to the specified value.

8. A flow rate compensation device for a breathing machine, characterized by, The method comprises: an offset determination module, configured to acquire an end-expiratory volume of the ventilator, and determine whether the end-expiratory volume is zeroed; when the end-expiratory volume is not zeroed, determine whether a flow rate baseline is offset from zero; a drift compensation module, configured to, when the flow rate baseline is offset from zero, suppress a leakage factor in a leakage compensation strategy, and compensate a flow rate AD value according to a drift compensation strategy until the flow rate baseline is zeroed; a leakage compensation module, configured to recover the suppressed leakage factor, and compensate the flow rate according to the leakage compensation strategy based on the recovered leakage factor until the end-expiratory volume is zeroed.

9. A flow rate compensation system for a ventilator, comprising: The system comprises at least one processor; and a memory connected in communication with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the flow rate compensation method of the ventilator according to any one of claims 1-7.

10. A non-transitory computer readable storage medium, comprising: The non-volatile computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors to enable the one or more processors to perform the flow rate compensation method of the ventilator according to any one of claims 1-7.

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