Leakage flow calibration method and device for leakage hole of PEEP (positive end expiratory pressure) valve of anaesthesia machine

Abstract

The invention provides a leakage flow calibration method and device for a leakage hole of a PEEP valve of an anaesthesia machine, and relates to the technical field of medical instruments. The method comprises the following steps: identifying the type of a gas source currently connected with the anaesthesia machine, and selecting a to-be-calibrated gas source according to the pressure value of the connected gas source; wherein the gas source currently connected with the anaesthesia machine comprises at least one of an air source and an oxygen source; leakage flow pressure closed-loop calibration of the PEEP valve leakage hole is carried out based on the to-be-calibrated gas source; and writing the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into a storage area of a gas path system of the anaesthesia machine. Based on the technical scheme provided by the embodiment of the invention, the leakage flow calibration efficiency of the leakage hole of the PEEP valve of the anaesthesia machine can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a leakage flow calibration method and device for a leakage hole of a PEEP valve of an anesthesia machine. Background Art

[0002] With the rapid development of medical device technology, anesthesia machines are used more and more frequently, and the accurate use of gas flow is becoming more and more important.

[0003] Usually, since the gas circuit structure of the anesthesia machine includes a PEEP (positive end expiratory pressure) valve leakage hole, the flow rate of the leakage hole is different under different pressures. Currently, the relationship between the PEEP valve pressure and the leakage hole flow rate is mainly calibrated manually.

[0004] However, due to process and manufacturing differences, the aperture of the leakage hole of each anesthesia machine PEEP valve is different. Before calibrating the flow, it is necessary to manually calibrate each pressure value of the anesthesia machine and then calibrate the flow. The operation is cumbersome, slow, costly, and has low calibration efficiency. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a leakage flow calibration method and device for a leakage hole of a PEEP valve of an anesthesia machine.

[0006] According to a first aspect of an embodiment of the present disclosure, a method for calibrating the leakage flow of a PEEP valve leakage hole of an anesthesia machine is provided, the method comprising: identifying the type of gas source currently connected to the anesthesia machine, and selecting a gas source to be calibrated according to the pressure value of the connected gas source; wherein the gas source currently connected to the anesthesia machine comprises at least one of an air gas source and an oxygen gas source; performing a closed-loop pressure calibration of the leakage flow of the PEEP valve leakage hole based on the gas source to be calibrated; and writing the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into a storage area of ​​the gas circuit system of the anesthesia machine.

[0007] Optionally, according to the pressure value of the connected gas source, the gas source to be calibrated is selected, including: determining whether the pressure of the connected gas source is greater than or equal to a preset pressure value; if the pressure of the air source and the pressure of the oxygen source are both greater than or equal to the preset pressure value, controlling the air drive valve to open, and using the air source for calibration; after the air source calibration is completed, controlling the oxygen drive valve to open, and using the oxygen source for calibration; if the pressure of the air source is less than the preset pressure value, and the pressure of the oxygen source is greater than or equal to the preset pressure value, controlling the oxygen drive valve to open, and using the oxygen source for calibration; if the pressure of the oxygen source is less than the preset pressure value, and the pressure of the air source is greater than or equal to the preset pressure value, controlling the air drive valve to open, and using the air source for calibration; if the pressure of the air source and the pressure of the oxygen source are both less than the preset pressure values, closing the oxygen drive valve, the air drive valve and the PEEP valve, and outputting an error code message of insufficient air and oxygen supply.

[0008] Optionally, a leakage flow pressure closed-loop calibration of the PEEP valve leakage hole is performed based on the gas source to be calibrated, including: setting the maximum pressure output by the gas source to be calibrated in the current pipeline as a first pressure value, and the minimum pressure value as a second pressure value, and identifying the maximum pressure that the gas source to be calibrated can output in the current pipeline as a third pressure value; generating a pressure-flow calibration table for pressure segment intervals according to the second pressure value and the third pressure value; controlling the suction valve in turn to adjust the pressure of the current pipeline to each test pressure according to the pressure-flow calibration table; for each test pressure, after the pressure is stabilized for a preset period of time, recording the leakage flow data of the PEEP valve leakage hole at each test pressure.

[0009] Optionally, a pressure-flow calibration table for pressure segmented intervals is generated based on the second pressure value and the third pressure value, including: dividing the test pressure into two test intervals based on the second pressure value, the preset pressure value and the third pressure value; generating test pressure points according to a first preset number in a first interval between the second pressure value and the preset pressure value; generating test pressure points according to a second preset number in a second interval between the preset pressure value and the third pressure value; wherein the first preset number is greater than the second preset number, and the spacing between the pressure test points in the first interval is smaller than the spacing between the pressure test points in the second interval.

[0010] Optionally, according to the pressure-flow calibration table, the intake valve is controlled in sequence to adjust the pressure of the current pipeline to each test pressure, including: according to the pressure-flow calibration table, the leakage pressure of the PEEP valve is set as the test pressure in sequence, and the intake valve is controlled by the PID controller to adjust the pressure of the current pipeline to each test pressure.

[0011] Optionally, the PID controller is used to control the intake valve to adjust the current pipeline pressure to various test pressures, including: monitoring whether the real-time pressure of the PEEP valve leakage hole is equal to the test pressure to which the intake valve is adjusted; if the real-time pressure is lower than the test pressure, reducing the duty cycle of the PEEP valve PID output; if the real-time pressure is higher than the test pressure, increasing the duty cycle of the PEEP valve PID output.

[0012] Optionally, the method also includes: during the calibration process, determining whether the flow test data of the PEEP valve leakage hole is abnormal; if it is determined that the flow test data is abnormal, stopping the flow calibration, and sending the abnormal flow test data and the cause of the abnormality to the host computer in real time.

[0013] According to a second aspect of an embodiment of the present disclosure, a leakage flow calibration device for a PEEP valve leakage hole of an anesthesia machine is provided, the device comprising: an air source identification module, an air source selection module, a flow testing module and a data writing module; the air source identification module is used to identify the type of air source currently connected to the anesthesia machine, and the air source selection module is used to select a gas source to be calibrated according to the pressure value of the connected air source; wherein the air source currently connected to the anesthesia machine comprises at least one of an air source and an oxygen source; the flow testing module is used to perform a closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the air source to be calibrated; the data writing module is used to write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the air source to be calibrated into the storage area of ​​the air circuit system of the anesthesia machine.

[0014] Optionally, the gas source selection module is specifically used to: determine whether the pressure of the connected gas source is greater than or equal to a preset pressure value; if the pressure of the air source and the pressure of the oxygen source are both greater than or equal to the preset pressure value, control the air drive valve to open, and use the air source for calibration; after the air source calibration is completed, control the oxygen drive valve to open, and use the oxygen source for calibration; if the pressure of the air source is less than the preset pressure value, and the pressure of the oxygen source is greater than or equal to the preset pressure value, control the oxygen drive valve to open, and use the oxygen source for calibration; if the pressure of the oxygen source is less than the preset pressure value, and the pressure of the air source is greater than or equal to the preset pressure value, control the air drive valve to open, and use the air source for calibration; if the pressure of the air source and the pressure of the oxygen source are both less than the preset pressure values, close the oxygen drive valve, the air drive valve and the PEEP valve, and output an error code message of insufficient air and oxygen supply.

[0015] Optionally, the flow testing module is specifically used to: set the maximum pressure output by the gas source to be calibrated in the current pipeline as a first pressure value, the minimum pressure value as a second pressure value, and identify the maximum pressure that the gas source to be calibrated can output in the current pipeline as a third pressure value; generate a pressure-flow calibration table for the pressure segment interval according to the second pressure value and the third pressure value; according to the pressure-flow calibration table, control the suction valve in turn to adjust the pressure of the current pipeline to each test pressure; for each test pressure, after the pressure is stable for a preset period of time, record the leakage flow data of the PEEP valve leakage hole under each test pressure.

[0016] Optionally, the flow testing module is specifically used to divide the test pressure into two test intervals according to a second pressure value, a preset pressure value and a third pressure value; in a first interval between the second pressure value and the preset pressure value, generate test pressure points according to a first preset number; in a second interval between the preset pressure value and the third pressure value, generate test pressure points according to a second preset number; wherein the first preset number is greater than the second preset number, and the spacing between the pressure test points in the first interval is smaller than the spacing between the pressure test points in the second interval.

[0017] Optionally, the flow testing module is specifically used to set the leakage pressure of the PEEP valve to each test pressure in sequence according to the pressure-flow calibration table, and to adjust the pressure of the current pipeline to each test pressure by controlling the suction valve through the PID controller.

[0018] Optionally, the flow testing module is specifically used to: monitor whether the real-time pressure of the PEEP valve leakage hole is equal to the test pressure adjusted to the inhalation valve; if the real-time pressure is lower than the test pressure, reduce the duty cycle of the PEEP valve PID output; if the real-time pressure is higher than the test pressure, increase the duty cycle of the PEEP valve PID output.

[0019] Optionally, the leakage flow calibration device for the leakage hole of the PEEP valve of the anesthesia machine also includes: an abnormality judgment module and a data sending module; the abnormality judgment module is used to judge whether the flow test data of the PEEP valve leakage hole is abnormal during the calibration process; the flow test module is also used to stop the flow calibration if it is determined that the flow test data is abnormal; the data sending module is used to send the abnormal flow test data and the cause of the abnormality to the upper computer in real time if it is determined that the flow test data is abnormal.

[0020] According to a third aspect of an embodiment of the present disclosure, there is provided a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor; a memory for storing instructions executable by the processor; wherein the processor is configured to: identify the type of gas source currently connected to the anesthesia machine, and select a gas source to be calibrated according to the pressure value of the connected gas source; the gas source currently connected to the anesthesia machine includes at least one of an air gas source and an oxygen gas source; perform a closed-loop pressure calibration of the leakage flow of the PEEP valve leakage hole based on the gas source to be calibrated; and write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into the storage area of ​​the gas circuit system of the anesthesia machine.

[0021] According to a fourth aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the leakage flow calibration method of the leakage hole of the PEEP valve of an anesthesia machine as described in the first aspect are implemented.

[0022] According to the fifth aspect of the embodiment of the present disclosure, the embodiment of the present disclosure provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine as described in the first aspect.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] In the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine described in the embodiment of the present disclosure, the type of gas source currently connected to the anesthesia machine can be first identified, and the gas source to be calibrated can be selected according to the pressure value of the connected gas source; then, the leakage flow pressure closed-loop calibration of the leakage hole of the PEEP valve is performed based on the gas source to be calibrated; finally, the leakage flow calibration data of the leakage hole of the PEEP valve corresponding to the gas source to be calibrated is written into the storage area of ​​the gas circuit system of the anesthesia machine. Compared with the traditional manual calibration method, the type of gas source connected to the anesthesia machine can be automatically identified, the gas source can be automatically selected for calibration, and the relationship between the leakage hole pressure and the leakage flow of the PEEP valve of the anesthesia machine under different gas sources under different pressures can be automatically found, and there is no need to manually determine whether the current gas source is sufficient, thereby reducing manual operations. Through closed-loop calibration, the stability of PEEP valve pressure and monitored leakage flow values ​​can be increased to ensure calibration consistency. When calibrating different anesthesia machines, the data deviation caused by the difference between the gas circuits of different anesthesia machines can be reduced, thereby ensuring that the calibration data matches the current anesthesia machine system, that is, it can ensure that the relationship between the determined pressure and flow matches the PEEP valve leakage hole of the currently calibrated anesthesia machine system, thereby ensuring the consistency and stability of the PEEP valve pressure and leakage flow. The automatic calibration method has simple calibration steps, fast calibration speed, and short time consumption, which can improve calibration efficiency and improve the accuracy of PEEP valve leakage hole flow monitoring, thereby improving the accuracy of patient-end flow, thereby reducing the deviation between the inspiratory flow and the flow output to the patient end, and can improve the accuracy of tidal volume and reduce the deviation of tidal volume accuracy.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings herein are incorporated in the specification and constitute a part of the embodiments of the present disclosure, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the embodiments of the present disclosure.

[0027] Figure 1 One of the flow charts of a leakage flow calibration method of a leakage hole of a PEEP valve of an anesthesia machine provided in an embodiment of the present disclosure;

[0028] Figure 2 A second flow chart of a method for calibrating a leakage flow of a leakage hole of a PEEP valve of an anesthesia machine provided in an embodiment of the present disclosure;

[0029] Figure 3 A third flow chart of a method for calibrating a leakage flow of a leakage hole of a PEEP valve of an anesthesia machine provided in an embodiment of the present disclosure;

[0030] Figure 4A fourth flow chart of a method for calibrating a leakage flow of a leakage hole of a PEEP valve of an anesthesia machine provided in an embodiment of the present disclosure;

[0031] Figure 5 A schematic diagram of a pressure-flow test result curve provided in an embodiment of the present disclosure;

[0032] Figure 6 A fifth flow chart of a method for calibrating a leakage flow of a leakage hole of a PEEP valve of an anesthesia machine provided in an embodiment of the present disclosure;

[0033] Figure 7 A schematic diagram of a pressure closed-loop control provided in an embodiment of the present disclosure;

[0034] Figure 8 A schematic diagram of a flow calibration process provided by an embodiment of the present disclosure;

[0035] Fig. 9 A block diagram of a leakage flow calibration device for a leakage hole of a PEEP valve of an anesthesia machine provided by an embodiment of the present disclosure;

[0036] Fig.10 A hardware structure diagram of a computer device in which a leakage flow calibration system for a leakage hole of a PEEP valve of an anesthesia machine according to an embodiment of the present disclosure is located. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present disclosure as detailed in the appended claims.

[0038] The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments and are not intended to limit the disclosed embodiments. The singular forms of "a", "said" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0040] Next, the embodiments of the present disclosure are described in detail.

[0041] like Figure 1 As shown, Figure 1 A flow chart of a leakage flow calibration method for a leakage hole of a PEEP valve of an anesthesia machine provided by an embodiment of the present disclosure may include the following steps 101 to 103:

[0042] Step 101: Identify the type of gas source currently connected to the anesthesia machine, and select the gas source to be calibrated according to the pressure value of the connected gas source.

[0043] The gas source currently connected to the anesthesia machine includes at least one of an air source and an oxygen source.

[0044] Specifically, the type of gas source currently connected to the anesthesia machine can be determined by reading the values ​​on each gas source pressure sensor, so that the gas source to be calibrated can be switched through the selection valve during subsequent calibration.

[0045] It should be noted that if the connected gas source is one gas source, whether to use the gas source for calibration is determined based on the pressure value of the gas source; if the connected gas source is two gas sources, which gas source to use for calibration is determined based on the pressure values ​​of the two gas sources.

[0046] For example, if the gas source type to be calibrated is selected as an air source, and the calibration connection is not an air source, the gas source connected to the calibration can be switched from an oxygen source to an air source through the selection valve, and the air drive valve is opened. If the gas source type to be calibrated is selected as an oxygen source, and the calibration connection is not an oxygen source, the gas source connected to the calibration can be switched from an air source to an oxygen source through the selection valve, and the oxygen drive valve is opened.

[0047] Step 102: Perform a closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the gas source to be calibrated.

[0048] It should be noted that during the experiment, the PEEP valve pressure and monitoring leakage flow values ​​fluctuated less when using the closed-loop calibration method than when using the open-loop calibration method with a fixed duty cycle of the inhalation valve, which ensured the consistency of each calibration. However, in the actual calibration, due to the large differences in the diameters of the leakage holes of different inhalation valves and PEEP valves, the PEEP valve pressure and monitoring leakage flow values ​​fluctuated greatly, affecting the accuracy of the PEEP valve leakage calibration and failing to ensure the consistency of each calibration.

[0049] Step 103: Write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into the storage area of ​​the gas circuit system of the anesthesia machine.

[0050] Exemplarily, it can be stored in an EEPROM (Electrically Erasable Programmable read only memory) in the anesthesia machine system.

[0051] It should be noted that since the flow rate at the patient end of the anesthesia machine is equal to the inspiratory flow minus the expiratory flow minus the flow of the peep valve leak hole, and there is a PEEP valve leak hole in the gas circuit structure of the anesthesia machine, the flow of the leak hole is different under different pressures. If there is a deviation between the inspiratory flow set on the anesthesia machine and the flow output to the patient end, the actual output flow is inaccurate, resulting in a large deviation in the tidal volume accuracy. Among them, tidal volume (TV) refers to the amount of air inhaled or exhaled each time during quiet breathing.

[0052] The disclosed embodiment provides a leakage flow calibration method for the leakage hole of the PEEP valve of an anesthesia machine. First, the type of gas source currently connected to the anesthesia machine can be identified, and the gas source to be calibrated can be selected according to the pressure value of the connected gas source; then, the leakage flow pressure closed-loop calibration of the leakage hole of the PEEP valve is performed based on the gas source to be calibrated; finally, the leakage flow calibration data of the leakage hole of the PEEP valve corresponding to the gas source to be calibrated is written into the storage area of ​​the gas circuit system of the anesthesia machine. Compared with the traditional manual calibration method, the gas source type connected to the anesthesia machine can be automatically identified, the gas source can be automatically selected for calibration, and the relationship between the leakage hole pressure and the leakage flow of the PEEP valve of the anesthesia machine under different gas sources under different pressures can be automatically found. There is no need to manually determine whether the current gas source is sufficient, thereby reducing manual operations. Through closed-loop calibration, the stability of PEEP valve pressure and monitored leakage flow values ​​can be increased to ensure calibration consistency. When calibrating different anesthesia machines, the data deviation caused by the difference between the gas circuits of different anesthesia machines can be reduced, thereby ensuring that the calibration data matches the current anesthesia machine system, that is, it can ensure that the relationship between the determined pressure and flow matches the PEEP valve leakage hole of the currently calibrated anesthesia machine system, thereby ensuring the consistency and stability of the PEEP valve pressure and leakage flow. The automatic calibration method has simple calibration steps, fast calibration speed, and short time consumption, which can improve calibration efficiency and improve the accuracy of PEEP valve leakage hole flow monitoring, thereby improving the accuracy of patient-end flow, thereby reducing the deviation between the inspiratory flow and the flow output to the patient end, and can improve the accuracy of tidal volume and reduce the deviation of tidal volume accuracy.

[0053] Optionally, in the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure, as Figure 2 As shown in , the above step 101 may include the following step 101a, and at least one of steps 101b1 to 101b4:

[0054] Step 101a: Determine whether the pressure of the connected gas source is greater than or equal to a preset pressure value.

[0055] It should be noted that when performing flow calibration, the gas source may be sufficient or insufficient. In the embodiment of the present disclosure, flow calibration can be performed on the sufficient gas source when the gas source is sufficient, and no calibration is performed on the insufficient gas source when the gas source is insufficient.

[0056] It should be noted that if the first gas source is insufficient, after calibrating the second gas source first, you can determine again whether the first gas source is sufficient. If the first gas source is sufficient, you can switch to the first gas source to continue calibration. If the first gas source is still insufficient, stop calibrating the first gas source.

[0057] Step 101b1: If the pressure of the air source and the pressure of the oxygen source are both greater than or equal to the preset pressure value, open the air drive valve and use the air source for calibration. After the air source calibration is completed, control the oxygen drive valve to open and use the oxygen source for calibration.

[0058] For example, the preset pressure value is 100Kpa (kilopascal, unit of pressure). When the pressure of the oxygen source is greater than or equal to 100Kpa, and the pressure of the air source is greater than or equal to 100Kpa, the air-driven valve can be opened to use the air source to calibrate the relationship between the PEEP valve leakage orifice flow rate and the PEEP valve leakage orifice pressure under the air source condition. Thereafter, the selection valve is switched to the oxygen source, and the oxygen-driven valve is opened to use the oxygen source to calibrate the relationship between the PEEP valve leakage orifice flow rate and the PEEP valve leakage orifice pressure under the oxygen source condition.

[0059] Step 101b2: If the pressure of the air source is less than the preset pressure value and the pressure of the oxygen source is greater than or equal to the preset pressure value, the oxygen drive valve is controlled to open and the oxygen source is used for calibration.

[0060] For example, according to the value of the pressure sensor connected to the gas source, it is determined that the pressure of the air source is less than 100Kpa and the pressure of the oxygen source is greater than or equal to 100Kpa, then the oxygen drive valve is controlled to open, and the oxygen source is used to calibrate the relationship between the flow rate of the PEEP valve leakage hole and the pressure of the PEEP valve leakage hole under the oxygen source.

[0061] It should be noted that after the oxygen source calibration is completed, it is determined whether the pressure value of the air source is greater than or equal to the preset pressure value. If the air source pressure is always less than the preset pressure value, the air source is stopped from being used for calibration.

[0062] Step 101b3: If the pressure of the oxygen source is less than the preset pressure value and the pressure of the air source is greater than or equal to the preset pressure value, control the air drive valve to open and use the air source for calibration.

[0063] For example, according to the value of the pressure sensor connected to the gas source, it is determined that the pressure of the oxygen gas source is less than 100Kpa and the pressure of the air gas source is greater than or equal to 100Kpa, then the air drive valve is controlled to open, and the air gas source is used to calibrate the relationship between the flow rate of the PEEP valve leakage hole and the pressure of the PEEP valve leakage hole under the air gas source.

[0064] It should be noted that after the air source calibration is completed, it is determined whether the pressure value of the oxygen source is greater than or equal to the preset pressure value. If the oxygen source pressure is always less than the preset pressure value, the oxygen source is stopped from being used for calibration.

[0065] Step 101b4: If the pressure of the air source and the pressure of the oxygen source are both less than the preset pressure values, the oxygen drive valve, the air drive valve and the PEEP valve are controlled to be closed, and an error code message indicating insufficient air and oxygen supply is output.

[0066] It can be understood that if before and during calibration, the pressure of the air source and the pressure of the oxygen source are monitored to be less than the preset pressure value, the calibration can be stopped and Xiao Ai can wait for the next time when the gas source is sufficient to recalibrate.

[0067] Based on this solution, the anesthesia machine system can flexibly choose which gas source to calibrate first according to the pressure of the air source and the pressure of the oxygen source, and automatically select the gas source to be used for calibration through the gas source drive valve and the gas source selection valve. There is no need to manually determine whether the gas source is sufficient, and there is no need to manually switch the gas source, which simplifies the calibration operation steps and shortens the calibration time.

[0068] Optionally, in the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure, as Figure 3 As shown in , step 102 in the above method may include the following steps 102a to 102d:

[0069] Step 102a, setting the maximum pressure output by the gas source to be calibrated in the current pipeline as the first pressure value, the minimum pressure value as the second pressure value, and identifying the maximum pressure that the gas source to be calibrated can output in the current pipeline as the third pressure value.

[0070] It is understandable that the set maximum pressure value may be different from the actual maximum pressure value output, and the actual maximum pressure value output may be smaller than the set maximum pressure value.

[0071] Exemplarily, the maximum pressure MaxPress=100 cmH2O (centimeter of water column, a unit of pressure) and the minimum pressure MinPress=1 cmH2O may be set, wherein 1 cmH2O=0.00981 KPa.

[0072] Step 102b: Generate a pressure-flow calibration table for the pressure segment interval according to the second pressure value and the third pressure value.

[0073] Specifically, the overall pressure interval and the segmented interval are determined according to the actual maximum pressure value and the set minimum pressure value, and pressure value points of different densities can be set as test points for different intervals.

[0074] It should be noted that the pressure-flow calibration table can be automatically generated in combination with the pressure points used frequently in practical applications.

[0075] Step 102c: According to the pressure-flow calibration table, the air intake valve is controlled in sequence to adjust the pressure of the current pipeline to each test pressure.

[0076] It can be understood that the anesthesia machine system can control the inspiration valve to adjust the current pipeline pressure to various test pressures according to the generated pressure-flow calibration table between partitions, in the order of gradually increasing pressure values ​​or gradually decreasing pressure values.

[0077] Step 102d: for each test pressure, after the pressure is stabilized for a preset period of time, record the leakage flow data of the leakage hole of the PEEP valve under each test pressure.

[0078] It should be noted that when the suction valve is controlled to adjust the pressure of the current pipeline to each test pressure, if the test pressure reaches a stable state after a preset period of time, the leakage flow data of the PEEP valve leakage hole under the test pressure is recorded while the test pressure value remains stable. Then, the suction valve is controlled to adjust the test pressure of the current pipeline to the next test pressure in the pressure-flow calibration table. The above verification steps are repeated until the leakage flow data of the PEEP valve leakage hole is obtained for each test pressure point in the pressure-flow calibration table.

[0079] Based on this scheme, the test pressure value can be calibrated based on the maximum pressure value actually adjusted to control the inspiration valve in the current anesthesia machine system and the set minimum pressure value, and a pressure-flow calibration table matching the PEEP valve leakage hole in the anesthesia machine system is generated. Based on the calibrated pressure-flow calibration table, the inspiration valve is sequentially controlled to be adjusted to a pressure value that is calibrated in the pressure-flow calibration table. When the calibrated pressure value is stable, the leakage flow data of the PEEP valve leakage hole is read as the leakage flow of the PEEP valve leakage hole at the pressure value. The leakage flow obtained in this way matches the leakage hole with high stability and consistency.

[0080] It should be noted that in the embodiment of the present disclosure, different pressures may be tested in sections, and the density of pressure points in different sections is different.

[0081] For example, when the pressure value is between 0 and the set minimum pressure value, no measurement is performed; when the minimum pressure value is between the minimum pressure value and the preset pressure value, a larger measurement density is selected; when the preset pressure value is between the actual maximum pressure value, a smaller measurement density is selected.

[0082] Optionally, in the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure, Figure 4 The above step 102b may include the following steps 102b1 and 102b2:

[0083] Step 102b1, dividing the test pressure into two test intervals according to the second pressure value, the preset pressure value and the third pressure value.

[0084] The specific value of the preset pressure value can be set according to demand, and the embodiment of the present disclosure does not specifically limit this.

[0085] Step 102b2, in a first interval between the second pressure value and the preset pressure value, generate test pressure points according to a first preset number; in a second interval between the preset pressure value and the third pressure value, generate test pressure points according to a second preset number.

[0086] The first preset number is greater than the second preset number, and the spacing between the pressure test points in the first interval is smaller than the spacing between the pressure test points in the second interval.

[0087] Optionally, in each interval, the distance between two adjacent pressure test points is the same, that is, in each test interval, the test points may be evenly distributed.

[0088] Optionally, the test points in each interval may also be distributed non-uniformly. For example, after the distribution of the test points is determined according to the test interval and the test quantity, each test point is adjusted to be a test point close to an actual usage value.

[0089] For example, the generated test points include 2.4cmH2O, 2.9cmH2O, and 3.4cmH2O, which can be automatically adjusted to 2.5cmH2O (2.5cmH2O is used for high frequency in actual applications), 3.0cmH2O (2.5cmH2O is used for high frequency in actual applications), and 3.5cmH2O (3.5cmH2O is used for high frequency in actual applications).

[0090] It should be noted that specific values ​​of the first preset number and the second preset number may be set based on accuracy requirements, and the embodiments of the present disclosure do not specifically limit this.

[0091] Specifically, in actual use, the frequently used pressure values ​​are usually located in the interval with smaller pressure values, and the infrequently used pressure values ​​are located in the interval with larger pressure values. Therefore, the test pressure can be divided into two larger intervals based on the preset pressure value. Among them, in the interval with smaller pressure values ​​as a whole, the distance between two adjacent pressure test points is small, that is, the test density in the interval with smaller pressure values ​​as a whole is large; in the interval with larger pressure values ​​as a whole, the distance between two adjacent pressure test points is large, that is, the test density in the interval with larger pressure values ​​as a whole is small.

[0092] In the embodiment of the present disclosure, two principles are followed when generating the test pressure points.

[0093] Principle 1: Meet actual accuracy requirements;

[0094] Principle 2: Cover most of the pressure points used in practical applications.

[0095] It should be noted that, in the embodiment of the present disclosure, a theoretical fitting curve may be first determined according to the actual maximum pressure and the set minimum pressure, and then the curve may be re-divided according to the test data of the leakage pressure and leakage flow of the actual PEEP valve. Figure 5 A schematic diagram of a pressure-flow test result curve provided by an embodiment of the present disclosure can be segmented and point-selected, such as Figure 5 As shown in , the A section interval is [0,1] and no test is performed, the B section interval is [1, preset pressure value], the C section interval is [preset pressure value, actual maximum pressure value], the measurement density of the B section interval is greater than the measurement density of the C section interval, and the D section interval is not tested. By connecting the measurement results of the three sections A, B and C with the 0 point, an actual curve can be formed.

[0096] It should be noted that, generally, the pressure-flow rate is in a linear relationship. Figure 5 The linear relationship shown is used as an example for explanation. In practice, it may not be a completely linear relationship. Due to the difference in the size of the leakage hole of the PEEP valve, the measurement results of each anesthesia machine are not exactly the same.

[0097] Based on this solution, test pressure points can be automatically generated in segments according to the set minimum pressure, preset pressure value and actual maximum pressure value, and then a pressure-flow calibration table can be generated. When the system of each anesthesia machine performs leakage flow calibration of the PEEP valve leakage hole, the output pressure of the inspiration valve can be controlled based on each point in the matching pressure-flow calibration table of the anesthesia machine system. The data deviation caused by the inconsistent relationship between the pressure and flow of the PEEP valve leakage hole due to material deviation and installation method differences in the gas circuits of different anesthesia machines can be solved. Before leaving the factory, each anesthesia machine performs calibration of the PEEP valve leakage hole pressure and flow according to the calibration method provided in the embodiment of the present disclosure, which can ensure that the calibration data can better match the stability of the patient-end flow rate in each anesthesia machine system.

[0098] Optionally, in the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure, the above step 102c may include the following step 102c1:

[0099] Step 102c1, according to the pressure-flow calibration table, set the leakage pressure of the PEEP valve to each test pressure in turn, and control the suction valve through the PID controller to adjust the pressure of the current pipeline to each test pressure.

[0100] Generally, a PID controller involves an input quantity, an output quantity, a proportional term, an integral term, and a differential term. The PID controller can be expressed by the following formula (1).

[0101]

[0102] Where u(t) represents the output stable pressure, e(t) represents the pressure deviation between the test pressure and the actual pressure, and K p e(t) is the proportional term of the PID controller, K p is the proportional coefficient, and the proportional coefficient range is 0.1 to 0.3. is the integral term of the PID controller, k i is the integral coefficient, the integral coefficient value range is 0.01 to 0.03, is the differential term of the PID controller, k d is the differential coefficient. In this scheme, the differential coefficient is not used for adjustment, and the proportional coefficient and the integral coefficient are used to adjust the output duty cycle.

[0103] Specifically, the pressure stability fluctuation of the pressure closed-loop output fluctuates around 1 cmH2O. Experimental verification shows that if a pressure open-loop test is used, the maximum pressure stability fluctuation of the pressure open-loop test is 4 cmH2O.

[0104] Based on this scheme, the pressure closed-loop control constant pressure method can be used to control the suction valve to adjust the current pipeline pressure to a stable state, thereby enhancing the stability and accuracy of the PEEP valve leakage flow calibration and reducing the pressure fluctuation monitored by the PEEP valve pressure sensor.

[0105] Optionally, in the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure, Figure 6 The above step 102c1 can be specifically performed by the following steps c11 and c12, or by the following steps c11 and c13:

[0106] Step c11, monitoring whether the real-time pressure of the PEEP valve leakage hole is equal to the test pressure adjusted to the inhalation valve.

[0107] Step c12: If the real-time pressure is less than the test pressure, the duty cycle of the PEEP valve PID output is reduced.

[0108] Step c13: If the real-time pressure is greater than the test pressure, increase the duty cycle of the PEEP valve PID output.

[0109] Figure 7 A schematic diagram of a pressure closed-loop control provided in an embodiment of the present disclosure is shown in FIG. Figure 7As shown in the figure, the PEEP valve pressure can be set first, and the suction valve pressure can be controlled by the PID controller to output a stable pressure to ensure that the pressure of the PEEP valve leakage hole monitored by the rear-end pressure sensor (i.e., the current pipeline pressure) is stable. The pressure sensor can monitor the current PEEP valve leakage hole pressure in real time.

[0110] Based on this scheme, the pressure of the leakage hole of the PEEP valve can be calibrated in a closed loop to reduce the pressure fluctuation of the leakage hole of the PEEP valve monitored by the PEEP valve pressure sensor, thereby enhancing the stability and accuracy of the PEEP valve leakage flow calibration.

[0111] Optionally, the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine provided in the embodiment of the present disclosure may further include the following step 104:

[0112] Step 104: During the calibration process, determine whether the flow test data of the PEEP valve leakage hole is abnormal.

[0113] Step 105: If it is determined that the flow test data is abnormal, stop the flow calibration, and send the abnormal flow test data and the abnormal reason to the host computer in real time.

[0114] Specifically, the anesthesia machine system can send flow test data of the PEEP valve leakage hole corresponding to each test pressure value in the pressure-flow calibration table to the host computer in real time.

[0115] Based on this solution, during the calibration process, if the flow test data under the test pressure is obtained, it can be determined whether the flow test data of the PEEP valve leakage hole is abnormal. If the flow test data is determined to be abnormal, the flow calibration is stopped, and the abnormal flow test data and the cause of the abnormality are sent to the host computer in real time. The user can be prompted that the abnormality has occurred to facilitate control of whether to continue or stop the calibration. For example, if the flow data decreases abnormally, it means that the real-time gas source is insufficient, and the calibration can be stopped.

[0116] Example:

[0117] Figure 8 A flow chart of a flow calibration process provided by an embodiment of the present disclosure is as follows: Figure 8 As shown in, the following steps may be included:

[0118] 1) PEEP valve leakage flow calibration variable initialization (CLBRT_PEEPVALVE_INIT);

[0119] 2) Identify the gas source currently connected to the anesthesia machine and switch the selector valve accordingly for testing (CLBRT_VALVE_TYPE_AIR_AND_O2_CHOOSE);

[0120] 3) Identify the maximum pressure of the current pipeline output (CLBRT_FlowSNS_OpenMaxPress);

[0121] 4) Set the segment interval of the PEEP valve leakage flow calibration table (CLBRT_FlowSNS_GetFlowTable);

[0122] 5) Control the suction valve to output a stable pressure according to the calibration table (CLBRT_PEEPVALVE_CTRL_PEEPPRESS);

[0123] 6) After a period of stabilization, record the corresponding pressure and leakage flow values ​​(CLBRT_PEEPVALVE_RECORD);

[0124] 7) Send PEEP valve leakage flow calibration data to the host computer for real-time display (CLBRT_PEEPVALVE_SEND_CAL_DATA);

[0125] 8) During the calibration process, determine in real time whether the calibration data is normal (CLBRT_PEEPVALVE_IS_TABLE_OK);

[0126] If normal, continue to calibrate the next pressure test point. If abnormal, proceed to step 10 below)

[0127] 9) After the calibration is completed, write the PEPP valve leakage flow calibration data to the EEPROM storage (CLBRT_PEEPVALVE_WRITE_EEPROM).

[0128] 10) Calibration error handling (CLBRT_PEEPVALVE_ERRCODE_PROC)

[0129] If an error exists, recalibrate the pressure, or abort the calibration.

[0130] Corresponding to the embodiments of the aforementioned methods, the embodiments of the present disclosure also provide embodiments of a device and a terminal to which it is applied.

[0131] like Fig. 9 As shown, Fig. 9A block diagram of a leakage flow calibration device for a PEEP valve leakage hole of an anesthesia machine provided in an embodiment of the present disclosure, the device 900 includes: a gas source identification module 901, a gas source selection module 902, a flow test module 903 and a data writing module 904; the gas source identification module 901 is used to identify the type of gas source currently connected to the anesthesia machine, and the gas source selection module 902 is used to select a gas source to be calibrated according to the pressure value of the connected gas source; wherein the gas source currently connected to the anesthesia machine includes at least one of an air gas source and an oxygen gas source; the flow test module 903 is used to perform a closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the gas source to be calibrated; the data writing module 904 is used to write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into the storage area of ​​the gas circuit system of the anesthesia machine.

[0132] Optionally, the gas source selection module 902 is specifically used to: determine whether the pressure of the connected gas source is greater than or equal to a preset pressure value; if the pressure of the air source and the pressure of the oxygen source are both greater than or equal to the preset pressure value, control the air drive valve to open, and use the air source for calibration; after the air source calibration is completed, control the oxygen drive valve to open, and use the oxygen source for calibration; if the pressure of the air source is less than the preset pressure value, and the pressure of the oxygen source is greater than or equal to the preset pressure value, control the oxygen drive valve to open, and use the oxygen source for calibration; if the pressure of the oxygen source is less than the preset pressure value, and the pressure of the air source is greater than or equal to the preset pressure value, control the air drive valve to open, and use the air source for calibration; if the pressure of the air source and the pressure of the oxygen source are both less than the preset pressure values, close the oxygen drive valve, the air drive valve and the PEEP valve, and output an error code message of insufficient air and oxygen supply.

[0133] Optionally, the flow test module 903 is specifically used to: set the maximum pressure output by the gas source to be calibrated in the current pipeline as a first pressure value, the minimum pressure value as a second pressure value, and identify the maximum pressure that the gas source to be calibrated can output in the current pipeline as a third pressure value; generate a pressure-flow calibration table for the pressure segment interval according to the second pressure value and the third pressure value; according to the pressure-flow calibration table, control the suction valve in turn to adjust the pressure of the current pipeline to each test pressure; for each test pressure, after the pressure is stable for a preset period of time, record the leakage flow data of the PEEP valve leakage hole under each test pressure.

[0134] Optionally, the flow testing module 903 is specifically used to divide the test pressure into two test intervals according to a second pressure value, a preset pressure value and a third pressure value; in a first interval between the second pressure value and the preset pressure value, generate test pressure points according to a first preset number; in a second interval between the preset pressure value and the third pressure value, generate test pressure points according to a second preset number; wherein the first preset number is greater than the second preset number, and the spacing between the pressure test points in the first interval is smaller than the spacing between the pressure test points in the second interval.

[0135] Optionally, the flow testing module 903 is specifically used to set the leakage pressure of the PEEP valve to each test pressure in sequence according to the pressure-flow calibration table, and to adjust the pressure of the current pipeline to each test pressure by controlling the suction valve through the PID controller.

[0136] Optionally, the flow test module 903 is specifically used to: monitor whether the real-time pressure of the PEEP valve leakage hole is equal to the test pressure adjusted to the inhalation valve; if the real-time pressure is lower than the test pressure, reduce the duty cycle of the PEEP valve PID output; if the real-time pressure is higher than the test pressure, increase the duty cycle of the PEEP valve PID output.

[0137] Optionally, the leakage flow calibration device for the leakage hole of the PEEP valve of the anesthesia machine also includes: an abnormality judgment module and a data sending module; the abnormality judgment module is used to judge whether the flow test data of the PEEP valve leakage hole is abnormal during the calibration process; the flow test module is also used to stop the flow calibration if it is determined that the flow test data is abnormal; the data sending module is used to send the abnormal flow test data and the cause of the abnormality to the host computer in real time if it is determined that the flow test data is abnormal.

[0138] The disclosed embodiment provides a leakage flow calibration device for the leakage hole of the PEEP valve of an anesthesia machine. First, the type of gas source currently connected to the anesthesia machine can be identified, and the gas source to be calibrated can be selected according to the pressure value of the connected gas source; then, the leakage flow pressure closed-loop calibration of the leakage hole of the PEEP valve is performed based on the gas source to be calibrated; finally, the leakage flow calibration data of the leakage hole of the PEEP valve corresponding to the gas source to be calibrated is written into the storage area of ​​the gas circuit system of the anesthesia machine. Compared with the traditional manual calibration method, the gas source type connected to the anesthesia machine can be automatically identified, the gas source can be automatically selected for calibration, and the relationship between the leakage hole pressure and the leakage flow of the PEEP valve of the anesthesia machine under different gas sources under different pressures can be automatically found. There is no need to manually determine whether the current gas source is sufficient, thereby reducing manual operations. Through closed-loop calibration, the stability of PEEP valve pressure and monitored leakage flow values ​​can be increased to ensure calibration consistency. When calibrating different anesthesia machines, the data deviation caused by the difference between the gas circuits of different anesthesia machines can be reduced, thereby ensuring that the calibration data matches the current anesthesia machine system, that is, it can ensure that the relationship between the determined pressure and flow matches the PEEP valve leakage hole of the currently calibrated anesthesia machine system, thereby ensuring the consistency and stability of the PEEP valve pressure and leakage flow. The automatic calibration method has simple calibration steps, fast calibration speed, and short time consumption, which can improve calibration efficiency and improve the accuracy of PEEP valve leakage hole flow monitoring, thereby improving the accuracy of patient-end flow, thereby reducing the deviation between the inspiratory flow and the flow output to the patient end, and can improve the accuracy of tidal volume and reduce the deviation of tidal volume accuracy.

[0139] The embodiments of the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine disclosed in the present invention can be applied to computer devices, such as servers or terminal devices. The device embodiments can be implemented by software, or by hardware or a combination of software and hardware. Taking software implementation as an example, as a device in a logical sense, the processor of the leakage flow calibration of the leakage hole of the PEEP valve of the anesthesia machine in which it is located reads the corresponding computer program instructions in the non-volatile memory into the memory and runs them. From the hardware level, if Fig.10 As shown, it is a hardware structure diagram of the computer device where the leakage flow calibration system of the leakage hole of the PEEP valve of the anesthesia machine of the embodiment of the present disclosure is located. Fig.10 In addition to the processor 1010, memory 1030, network interface 1020, and non-volatile memory 1040 shown, the server or electronic device where the device 1031 is located in the embodiment may also include other hardware according to the actual function of the computer device, which will not be described in detail.

[0140] Correspondingly, the embodiment of the present disclosure also provides a leakage flow calibration device for the leakage hole of the PEEP valve of an anesthesia machine, wherein the leakage flow calibration of the leakage hole of the PEEP valve of the anesthesia machine includes a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to: identify the type of gas source currently connected to the anesthesia machine, and select the gas source to be calibrated according to the pressure value of the connected gas source; the gas source currently connected to the anesthesia machine includes at least one of an air gas source and an oxygen gas source; perform a closed-loop pressure calibration of the leakage flow of the PEEP valve leakage hole based on the gas source to be calibrated; and write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into the storage area of ​​the gas circuit system of the anesthesia machine.

[0141] The implementation process of the functions and effects of each module in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, which will not be repeated here.

[0142] The embodiment of the present disclosure also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the leakage flow calibration method embodiment of the leakage hole of the PEEP valve of the anesthesia machine is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0143] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as ROM, RAM, magnetic disk or optical disk.

[0144] The disclosed embodiment further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned leakage flow calibration method embodiment of the leakage hole of the PEEP valve of the anesthesia machine, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0145] It should be understood that the chip mentioned in the embodiments of the present disclosure may also be referred to as a system-level chip, a system chip, a chip system, or a system-on-chip chip, etc.

[0146] The embodiment of the present disclosure provides a computer program product containing instructions. When the computer is run on a computer, the computer executes the steps of the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine as described above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0147] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the disclosed solution. A person of ordinary skill in the art can understand and implement it without paying creative labor.

[0148] The above describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0149] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the inventions claimed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not claimed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0150] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0151] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A leakage flow calibration method for a leakage hole of a PEEP valve of an anesthesia machine, characterized in that: The method comprises: Identify the type of gas source currently connected to the anesthesia machine, and select the gas source to be calibrated according to the pressure value of the connected gas source, wherein the gas source currently connected to the anesthesia machine includes at least one of an air gas source and an oxygen gas source; Performing a closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the gas source to be calibrated; The leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated is written into the storage area of ​​the gas circuit system of the anesthesia machine.

2. The method according to claim 1, characterized in that The step of selecting the gas source to be calibrated according to the pressure value of the connected gas source includes: Determine whether the pressure of the connected gas source is greater than or equal to the preset pressure value; If the pressure of the air source and the pressure of the oxygen source are both greater than or equal to the preset pressure value, the air drive valve is controlled to open, and the air source is used for calibration; after the air source calibration is completed, the oxygen drive valve is controlled to open, and the oxygen source is used for calibration; If the pressure of the air source is less than the preset pressure value, and the pressure of the oxygen source is greater than or equal to the preset pressure value, the oxygen driven valve is controlled to open, and the oxygen source is used for calibration; If the pressure of the oxygen source is less than the preset pressure value, and the pressure of the air source is greater than or equal to the preset pressure value, the air-driven valve is controlled to open, and the air source is used for calibration; If the pressure of the air source and the pressure of the oxygen source are both lower than the preset pressure value, the oxygen driven valve, the air driven valve and the PEEP valve are closed, and an error code message of insufficient air and oxygen supply is output.

3. The method according to claim 1 or 2, characterized in that: The closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the gas source to be calibrated includes: The maximum pressure output by the gas source to be calibrated in the current pipeline is set as a first pressure value, the minimum pressure value is set as a second pressure value, and the maximum pressure output by the gas source to be calibrated in the current pipeline is identified as a third pressure value; Generate a pressure-flow calibration table for pressure segment intervals according to the second pressure value and the third pressure value; According to the pressure-flow calibration table, the suction valve is controlled in sequence to adjust the pressure of the current pipeline to each test pressure; For each test pressure, after the pressure is stabilized for a preset period of time, the leakage flow data of the leakage hole of the PEEP valve under each test pressure is recorded.

4. The method according to claim 3, characterized in that The step of generating a pressure-flow calibration table for pressure segment intervals according to the second pressure value and the third pressure value comprises: Dividing the test pressure into two test intervals according to the second pressure value, the preset pressure value and the third pressure value; In a first interval between the second pressure value and the preset pressure value, a test pressure point is generated according to a first preset number; in a second interval between the preset pressure value and the third pressure value, a test pressure point is generated according to a second preset number; The first preset number is greater than the second preset number, and the spacing between the pressure test points in the first interval is smaller than the spacing between the pressure test points in the second interval.

5. The method according to claim 3, characterized in that: According to the pressure-flow calibration table, sequentially controlling the air intake valve to adjust the pressure of the current pipeline to each test pressure includes: According to the pressure-flow calibration table, the leakage pressure of the PEEP valve is set to each test pressure in turn, and the suction valve is controlled by the PID controller to adjust the pressure of the current pipeline to each test pressure.

6. The method according to claim 5, characterized in that The method of controlling the suction valve through the PID controller to adjust the current pipeline pressure to each test pressure includes: monitoring whether the real-time pressure of the PEEP valve leakage hole is equal to the test pressure to which the inhalation valve is adjusted; If the real-time pressure is less than the test pressure, the duty cycle of the PEEP valve PID output is reduced; If the real-time pressure is greater than the test pressure, the duty cycle of the PEEP valve PID output is increased.

7. The method according to claim 5, characterized in that The method further comprises: During the calibration process, determine whether the flow test data of the PEEP valve leakage hole is abnormal; If it is determined that the flow test data is abnormal, the flow calibration is stopped, and the abnormal flow test data and the cause of the abnormality are sent to the host computer in real time.

8. A leakage flow calibration device for a leakage hole of a PEEP valve of an anesthesia machine, characterized in that: The device comprises: an air source identification module, an air source selection module, a flow rate testing module and a data writing module; The gas source identification module is used to identify the type of gas source currently connected to the anesthesia machine; The gas source selection module is used to select the gas source to be calibrated according to the pressure value of the connected gas source; wherein the gas source currently connected to the anesthesia machine includes at least one of an air gas source and an oxygen gas source; The flow testing module is used to perform a closed-loop calibration of the leakage flow pressure of the PEEP valve leakage hole based on the gas source to be calibrated; The data writing module is used to write the leakage flow calibration data of the PEEP valve leakage hole corresponding to the gas source to be calibrated into the storage area of ​​the gas circuit system of the anesthesia machine.

9. A computer device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the leakage flow calibration method of the leakage hole of the PEEP valve of the anesthesia machine according to any one of claims 1 to 7 is implemented.

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