Leakage detection method of breathing circuit, medical equipment and storage medium

Abstract

The embodiment of the invention provides a leakage detection method for a breathing circuit, medical equipment and a storage medium, and the method comprises the steps: controlling the pressure of the breathing circuit to reach a first pressure, controlling a fluid conveying device to convey fluid to the breathing circuit at a threshold flow rate, obtaining a second pressure of the breathing circuit, and comparing the first pressure and the second pressure to determine whether leakage of the breathing circuit is less than the threshold flow rate. Thereby, the fluid is conveyed in the breathing circuit at the threshold flow rate, and the pressures of the breathing circuit before and after the fluid is conveyed are compared to determine whether the leakage of the breathing circuit is less than the threshold flow rate, thereby quickly and accurately determining whether the leakage amount of the breathing circuit is within a desired threshold by setting the desired threshold flow rate.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of medical equipment, and in particular to a breathing circuit leakage detection method, medical equipment, and storage medium. Background Art

[0002] Assisted breathing equipment is a key device to support the patient's vital signs, and the breathing circuit is one of the core components of assisted breathing equipment. Since the breathing circuit is usually formed by connecting various pipes and tanks, there may be leakage at the connection points. If the leakage exceeds the specified leakage standard, it cannot meet the use requirements. Therefore, it is usually necessary to conduct a leak test on the breathing circuit before using the equipment.

[0003] It should be noted that the above introduction to the technical background is only intended to provide a clear and complete description of the technical solution of the present application and to facilitate understanding by those skilled in the art. Summary of the invention

[0004] Conventional leak detection methods usually provide a certain amount of test gas into the breathing circuit, and then continuously monitor the air pressure in the circuit for a long time, and determine the amount of gas leakage or leakage rate in the breathing circuit according to the change in the air pressure in the circuit. Although the above process can accurately determine the leakage rate, the detection process takes a lot of time, and the determination of the leakage rate also requires a lot of calculations.

[0005] In response to at least one of the above technical problems, an embodiment of the present application provides a breathing circuit leakage detection method, a medical device and a storage medium.

[0006] According to a first aspect of an embodiment of the present application, a method for leak detection of a breathing circuit is provided, the method comprising:

[0007] controlling the pressure of the breathing circuit to reach a first pressure,

[0008] controlling the fluid delivery device to deliver fluid to the breathing circuit at a threshold flow rate,

[0009] obtaining a second pressure of the breathing circuit, and

[0010] The first pressure and the second pressure are compared to determine whether a leak in the breathing circuit is less than the threshold flow rate.

[0011] According to a second aspect of an embodiment of the present application, a medical device is provided, the medical device comprising:

[0012] Breathing circuits, used to provide respiratory support to patients,

[0013] a pressure sensor connected to the breathing circuit to detect the pressure of the breathing circuit,

[0014] a fluid delivery device that delivers fluid to the breathing circuit,

[0015] an input device that receives user input, and

[0016] A processor, which executes the steps of the method described in the embodiment of the first aspect.

[0017] According to a third aspect of the embodiments of the present application, a non-transitory computer-readable storage medium is provided, which is used to store a computer program. When the computer program is executed by a computer, the computer executes the method described in the embodiments of the first aspect.

[0018] One of the beneficial effects of the embodiments of the present application is that fluid is delivered in the breathing circuit at a threshold flow rate, and the pressure of the breathing circuit before and after the fluid is delivered is compared to determine whether the leakage of the breathing circuit is less than the threshold flow rate. Thus, by setting the expected threshold flow rate, it is possible to quickly and accurately determine whether the leakage amount of the breathing circuit is within the expected threshold.

[0019] With reference to the following description and accompanying drawings, the specific implementation of the embodiment of the present application is disclosed in detail, indicating the way in which the principle of the embodiment of the present application can be adopted. It should be understood that the implementation of the present application is not limited in scope. Within the scope of the spirit and clauses of the attached claims, the implementation of the present application includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other implementation methods can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a schematic diagram of the breathing circuit of the medical device;

[0022] Figure 2 is a schematic diagram of a leakage detection method according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram showing the change of pressure in a breathing circuit over time when the leakage detection method of an embodiment of the present application is used to detect the breathing circuit;

[0024] Figure 4 is another schematic diagram of the change of pressure in a breathing circuit over time when the leakage detection method of an embodiment of the present application is used to detect the breathing circuit;

[0025] Figure 5 It is a schematic diagram of a medical device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] With reference to the accompanying drawings, the foregoing and other features of the embodiments of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the embodiments of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the embodiments of the present application include all modifications, variations and equivalents that fall within the scope of the attached claims.

[0027] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0028] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0029] Features described and / or shown for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. The term "includes / comprising" when used herein refers to the presence of a feature, an entirety, a step, or a component, but does not exclude the presence or addition of one or more other features, entireties, steps, or components.

[0030] An embodiment of the present application provides a breathing circuit leakage detection method, which can be used to detect whether the leakage of the breathing circuit of a medical device meets the prescribed standards. Figure 1 This is a schematic diagram of the breathing circuit of a medical device. Figure 1 Take the structure and principle of the breathing circuit as an example to briefly explain.

[0031] It should be noted that the following description of the breathing circuit is only to make the leakage detection method of the embodiment of the present application clearer. The embodiment of the present application does not limit the implementation method of the breathing circuit. The specific implementation method of the breathing circuit can refer to the relevant technology. Figure 1 The breathing circuit of an anesthesia machine is used as an example for illustration, but the leakage detection method of the embodiment of the present application is not limited to detecting the breathing circuit of an anesthesia machine, for example, it can also detect the breathing circuit of a ventilator.

[0032] like Figure 1 As shown, the medical device 10 may include a fluid delivery device 101, a ventilation engine 102, a bellows 103, an exhaust system 104, a respiratory gas source 105, an anesthesia source 106, a mixer 107, an intake flow control valve 108, an exhalation flow control valve 109, a circuit 110, and a catheter connecting the various components (not shown).

[0033] In some embodiments, breathing gas source 105 is connected to mixer 107. Breathing gas source 105, for example, provides fresh gas, such as oxygen, air, nitrous oxide, etc., which is mixed in mixer 107. Mixer 107 is also connected to anesthesia source 106. After adding anesthetic to the mixed gas, the gas flows into the interior of bellows 103. The interior of bellows 103 is connected to the respiratory tract of subject 200. For example, subject interface 1101 of circuit 110 is connected to the respiratory tract of subject 200, and bellows 103 is connected to the respiratory tract of subject 200 through subject interface 1101.

[0034] In some embodiments, the fluid delivery device 101 delivers fluid to the breathing circuit 100 (which will be described later). For example, the ventilation engine 102 is connected to the fluid delivery device 101. The ventilation engine 102 may include a pressure reducing valve, a flow valve, a flow sensor, and a one-way valve (not shown) connected in sequence. The driving gas (such as air) of the fluid delivery device 101 flows into the one-way valve via the flow valve and the sensor and enters the breathing circuit 100.

[0035] In some embodiments, the interior of the bellows 103 is also connected to an exhaust system 104, which is used to recover anesthetic waste gas. The implementation of the exhaust system 104 (such as Anesthesia Gas Scavenging System, AGSS) can refer to the prior art and will not be described in detail here.

[0036] In some embodiments, an intake flow control valve 108 and an exhalation flow control valve 109 (such as a diaphragm or a balloon-type valve) are respectively disposed in a conduit near the inlet and a conduit near the exhalation port to control the gas flow and pressure of intake and exhalation. The intake flow control valve 108 may be a solenoid valve.

[0037] During most of the inspiratory phase of the patient's breathing, the gas from the anesthesia machine is transmitted to the catheter through the intake flow control valve 108, and finally reaches the patient through the drive of the ventilation engine 102. During most of the expiratory phase of the patient's breathing, the one-way valve is closed, and the exhaled gas reaches the expiratory flow control valve 109 through the catheter and is then discharged to the exhaust system 104.

[0038] In some embodiments, the medical device 10 may further include a carbon dioxide absorber 115 , and fresh gas from an anesthesia machine (driven by a driving gas) enters the lungs of the subject 200 through the object interface 1101 of the loop 110 . After the diaphragm contracts, carbon dioxide is discharged in the loop 110 and absorbed by the carbon dioxide absorber 115 .

[0039] In the embodiment of the present application, the breathing circuit 100 of the medical device 10 is used to provide respiratory support to the object 200 (e.g., a patient), and includes, for example, a gas source for providing respiratory support, a control valve, and a conduit connecting the various components. In the above example, the breathing circuit 100 includes, for example, a ventilation engine 102, a bellows 103, an exhaust system 104, a respiratory gas source 105, an anesthesia source 106, a mixer 107, an intake flow control valve 108, an exhalation flow control valve 109, a circuit 110, and a conduit connecting the various components.

[0040] In some embodiments, the medical device 10 may further include a pressure sensor 111, which is connected to the breathing circuit 100 to detect the pressure of the breathing circuit 100, for example, Figure 1 As shown, the pressure sensor 111 is connected in the circuit 110 to detect the pressure in the circuit 110 .

[0041] In addition, if Figure 1 As shown, the medical device 10 may also include a monitoring device 112 for monitoring the vital signs (respiratory rate), gas pressure, etc. of the subject 200; a hand-controlled device 113, which plays a similar role to the ventilation engine 902; and an oxygen concentration detector 114, which is used to detect the oxygen content in the air intake passage, etc.

[0042] In addition, the medical device 10 does not necessarily have to include Figure 1 All components shown in ; in addition, medical devices may also include Figure 1 For components not shown in the figure, please refer to the prior art for details, and they will not be illustrated one by one here.

[0043] In addition, when the medical device is a ventilator, the ventilator does not need to include Figure 1 An anesthesia source 106 is shown. In addition, a breathing gas source 105 provides, for example, fresh gas, such as oxygen, air, etc.

[0044] In the above example, if Figure 1 As shown, since breathing circuit 100 includes many connection structures, there is a possibility of gas leakage at the connection. If the leakage is large, it will have a negative impact on the treatment effect and may even cause harm to the patient's health. Therefore, before providing respiratory support for subject 200, it is very important to perform leakage detection on breathing circuit 100.

[0045] Figure 2 is a schematic diagram of a leakage detection method according to an embodiment of the present application, Figure 3 is a schematic diagram of the change of pressure in the breathing circuit over time when the leakage detection method of the embodiment of the present application is used to detect the breathing circuit, Figure 4 This is another schematic diagram of the pressure change over time in the breathing circuit when the leakage detection method of the embodiment of the present application is used to detect the breathing circuit. Figures 1 to 4 A breathing circuit leakage detection method according to an embodiment of the present application is described.

[0046] like Figure 2 As shown, the leakage detection method 20 includes:

[0047] 201: Controlling the pressure of the breathing circuit to reach a first pressure,

[0048] 202: Controlling the fluid delivery device to deliver fluid to the breathing circuit at a threshold flow rate,

[0049] 203: Obtaining a second pressure of the breathing circuit, and

[0050] 204: Compare the first pressure and the second pressure to determine whether the leakage of the breathing circuit is less than the threshold flow rate.

[0051] The inventors realize that when users conduct leak tests on breathing circuits, they are more concerned about whether the severity of the leak is acceptable. Accordingly, an embodiment of the present application provides a method for determining the degree of leakage by rapid qualitative comparison. The above detection method can quickly determine whether the gas leakage flow rate is less than the threshold flow rate simply by judging the relationship between the first pressure and the second pressure, thereby being able to quickly inform the user whether the current leakage degree of the breathing circuit can meet the use requirements. On the one hand, the above process does not require a complicated calculation process; on the other hand, since only the values ​​of the first pressure and the second pressure need to be compared, it does not take too much time. The above process is simple and reliable and can meet user needs.

[0052] In some embodiments, the breathing circuit is a fluid path from the fluid output port of the fluid delivery device to the patient access port. Figure 1As shown, the breathing circuit 100 is a gas passage from the fluid output port of the fluid delivery device 101 (i.e., the gas interface between the fluid delivery device 101 and the ventilation engine 102) to the object interface 1101. Before performing a leak test, the object interface 1101 can be blocked with a plug or other blocking block to ensure that the breathing circuit 100 being tested is closed.

[0053] In operation 201, the pressure in the breathing circuit 100 reaches a first pressure Paw0 (eg, Figure 3 As shown), the first pressure Paw0 is, for example, a pressure above the ambient pressure.

[0054] In some embodiments, the fluid delivery device 101 can be controlled to deliver fluid to the breathing circuit 100 at a predetermined flow rate until the pressure of the breathing circuit 100 reaches a first pressure Paw0, the predetermined flow rate is, for example, 6 L / min, and the first pressure is, for example, 3 kPa higher than the ambient pressure. Figure 3 As shown, the breathing circuit 100 is pressurized until the first pressure Paw0 is reached, and the pressurization period is, for example, T1, and the time when the first pressure Paw0 is reached is recorded as T0. The length of the pressurization period T1 can be adjusted by controlling the pressurization flow rate. In addition, the pressurization flow rate can be a constant flow rate or a non-constant flow rate, which is not limited in the embodiment of the present application.

[0055] However, the embodiments of the present application are not limited thereto. For example, the first pressure Paw0 may also be the atmospheric pressure in the detection environment, that is, the ambient pressure. For example, the breathing circuit 100 may not be operated in any way, so that the pressure in the breathing circuit 100 slowly approaches the ambient pressure. The first pressure may be set according to actual needs, and the embodiments of the present application are not limited thereto.

[0056] In operation 202, the fluid delivery device 101 is controlled to deliver fluid (e.g., compressed air) to the breathing circuit 100 at a threshold flow rate B. The threshold flow rate B is used to determine whether the leakage amount of the breathing circuit 100 is within the range specified by the leakage standard. The specific determination method will be described later.

[0057] In some embodiments, the threshold flow rate B can be a user-defined flow rate. For example, the user can input the threshold flow rate B through the input device of the medical device 10 (which will be described in detail later). In addition, the embodiment of the present application does not limit the value of the threshold flow rate B. For example, the value range of the threshold flow rate B is 100ml / min to 750ml / min. In addition, when the user does not input the threshold flow rate B, the fluid delivery device 101 can also be controlled to deliver fluid to the breathing circuit at a default threshold flow rate. The default threshold flow rate is, for example, 500ml / min. In addition, if Figure 3As shown, the fluid delivery device 101 can be controlled to continuously deliver fluid to the breathing circuit for a duration of Δt. The embodiment of the present application does not limit the value of the duration Δt. For example, the value range of Δt is 2 seconds to 5 seconds.

[0058] In operation 203, for example, the pressure in the circuit 110 is detected by the pressure sensor 111, thereby obtaining the second pressure Paw1 (eg, Figure 3 shown).

[0059] In some embodiments, Figure 3 As shown, the operation 202 lasts for a predetermined time Δt, and the pressure of the circuit 110 can be detected at time T0+Δt. In addition, when the second pressure Paw1 is detected, the fluid delivery device 101 can be controlled to stop delivering the fluid.

[0060] In operation 204, the first pressure is compared with the second pressure to determine whether the leakage of the breathing circuit 100 is less than a threshold flow rate, thereby determining whether the leakage amount meets the expected use requirements.

[0061] Through the above method, it is only necessary to wait for a short time, such as T1+T2 or T1, to quickly draw a conclusion on whether the gas leakage flow rate is within the threshold flow rate. In this way, user needs are met without complicated data processing and long waiting process.

[0062] Combine the following Figure 3 and Figure 4 A specific determination method will be described.

[0063] In at least one embodiment, operation 204 includes comparing whether the second pressure is greater than the first pressure, and if so, determining that the leak of the breathing circuit is less than the threshold flow rate.

[0064] For example, Figure 3 As shown in FIG. 1 , if the leakage of the breathing circuit is less than the threshold flow rate B, then during the period T2 from time T0 to time T0+Δt, the gas outlet volume of the breathing circuit (i.e., the amount of leakage gas) is less than the gas intake volume, and therefore, the pressure of the breathing circuit will rise. On the contrary, if the leakage of the breathing circuit is greater than the threshold flow rate B, then during the period T2, the gas outlet volume of the breathing circuit (i.e., the amount of leakage gas) is greater than the gas intake volume, and therefore, the pressure of the breathing circuit will decrease. In addition, if the leakage of the breathing circuit is exactly equal to the threshold flow rate B, then during the period T2, the gas outlet volume of the breathing circuit (i.e., the amount of leakage gas) is equal to the gas intake volume, and therefore, the pressure of the breathing circuit will remain unchanged.

[0065] Therefore, if the second pressure Paw1 is greater than the first pressure Paw0 , it can be determined that the leakage Leakage of the breathing circuit is less than the threshold flow rate B.

[0066] In addition, if the second pressure Paw1 is equal to the first pressure Paw0, then it can be determined that the leakage Leakage of the breathing circuit is equal to the threshold flow rate B; if the second pressure Paw1 is less than the first pressure Paw0, then it can be determined that the leakage Leakage of the breathing circuit is greater than the threshold flow rate B.

[0067] Therefore, the threshold flow rate B can be set according to the expected leakage amount. When it is determined that the leakage of the breathing circuit is less than or equal to the threshold flow rate B, it can be considered that the leakage of the breathing circuit can meet the requirements, that is, the breathing circuit has passed the leakage detection (pass) and can provide respiratory support for the patient; otherwise, it is considered that the leakage of the breathing circuit cannot meet the requirements (fail) and needs to be repaired.

[0068] In the above example, the first pressure Paw0 is greater than the ambient pressure (ie, atmospheric pressure) in the detection environment. Figure 4 Take the example of describing the case where the first pressure Paw0 is equal to the ambient pressure in the detection environment.

[0069] like Figure 4 As shown in FIG. 1 , when the first pressure Paw0 is atmospheric pressure, if the leakage Leakage of the breathing circuit is less than the threshold flow rate B, then during the period T2 from time T0 to time T0+Δt, the gas output of the breathing circuit (i.e., the amount of leaked gas) is less than the gas intake, and therefore, the pressure of the breathing circuit will rise. However, if the leakage Leakage of the breathing circuit is greater than or equal to the threshold flow rate B, then during the period T2, the gas intake of the breathing circuit is insufficient to cover the leakage, and therefore, the pressure in the breathing circuit remains at the ambient pressure, i.e., the pressure of the breathing circuit does not change.

[0070] That is, in this case, if the second pressure Paw1 is greater than the first pressure Paw0, it can be determined that the leakage of the breathing circuit is less than the threshold flow rate B, that is, it is considered that the leakage of the breathing circuit can meet the demand and the breathing circuit passes the leakage detection (pass).

[0071] If it is detected that the second pressure Paw1 is equal to the first pressure Paw0, then it can be determined that the leakage Leakage of the breathing circuit is greater than or equal to the threshold flow rate B.

[0072] Therefore, in this case, the system can quickly perform leak detection, eliminating the time for pre-pressurizing the breathing circuit and saving the high-pressure gas used for pressurization.

[0073] In addition, in some embodiments, the leakage detection method may further include: when it is determined that the leakage of the breathing circuit cannot meet the requirements, outputting information prompting that the breathing circuit needs to be repaired.

[0074] In some embodiments, the threshold flow rate is input by a user and is configured to be adjustable. Thus, the user can set the threshold flow rate according to actual needs to meet different medical needs.

[0075] For example, the leakage detection method may further include outputting information prompting the user to input the threshold flow rate. For example, the medical device 10 may include a human-computer interaction device, such as a mouse, a keyboard, and a display, and a prompt box prompting the user to input the threshold flow rate may be displayed on the display, and the user may input the threshold flow rate through the mouse and keyboard.

[0076] It can be seen from the above embodiments that fluid is delivered in the breathing circuit at a threshold flow rate, and the pressure of the breathing circuit before and after the fluid is delivered is compared to determine whether the leakage of the breathing circuit is less than the threshold flow rate. Therefore, by setting the desired threshold flow rate, it is possible to quickly and accurately determine whether the leakage amount of the breathing circuit is within the expected threshold.

[0077] The present application also provides a medical device, Figure 5 It is a schematic diagram of a medical device according to an embodiment of the present application.

[0078] like Figure 5 As shown, the medical device 500 includes a breathing circuit 501 , a pressure sensor 502 , a fluid delivery device 503 , an input device 504 , and a processor 505 .

[0079] The breathing circuit 501 is used to provide respiratory support to the patient, and its implementation can refer to the implementation of the breathing circuit 100 in the above embodiment.

[0080] The pressure sensor 502 is connected to the breathing circuit 501 to detect the pressure of the breathing circuit 401 . The implementation of the pressure sensor 502 may refer to the implementation of the pressure sensor 111 in the above embodiment.

[0081] The fluid delivery device 503 delivers fluid to the breathing circuit 501 , and its implementation can refer to the implementation of the fluid delivery device 101 in the above embodiment.

[0082] The input device 504 receives user input, such as a mouse, a keyboard, etc. In addition, the medical device 500 may also include a display device (not shown). The input device and the display device may be combined into a human-computer interaction device, such as a touch display, etc.

[0083] The processor 505 executes the steps of the leakage detection method described in any of the aforementioned embodiments, thereby controlling devices such as the pressure sensor 502 , the fluid delivery device 503 , and the input device 504 .

[0084] In addition, the medical device 500 may further include other components, and their implementations may refer to the implementations of the medical device 10 in the above embodiment, which will not be described in detail here.

[0085] An embodiment of the present application also provides a computer-readable program, wherein when the program is executed, the program enables the computer to execute the leakage detection method described in the above embodiment in the medical device.

[0086] An embodiment of the present application further provides a non-transitory computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer executes the leakage detection method described in the above embodiment.

[0087] The above embodiments are merely exemplary of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0088] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0089] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and variations are easily conceivable to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but all suitable modifications, variations, and equivalents that fall within their scope may be covered.

Claims

1. A method for leak detection of a breathing circuit, characterized in that: The method comprises: controlling the pressure of the breathing circuit to reach a first pressure, controlling the fluid delivery device to deliver fluid to the breathing circuit at a threshold flow rate, obtaining a second pressure of the breathing circuit, and The first pressure and the second pressure are compared to determine whether a leak in the breathing circuit is less than the threshold flow rate.

2. The leakage detection method according to claim 1, characterized in that: Determining whether the leakage of the breathing circuit is less than the threshold flow rate includes: A comparison is made as to whether the second pressure is greater than the first pressure, and if so, it is determined that the leakage of the breathing circuit is less than the threshold flow rate.

3. The leakage detection method according to claim 1, characterized in that: The controlling the pressure of the breathing circuit comprises: The fluid delivery device is controlled to deliver fluid to the breathing circuit until the pressure of the breathing circuit reaches the first pressure.

4. The leakage detection method according to claim 1, characterized in that: The obtaining of the second pressure of the breathing circuit comprises: The second pressure is acquired after the fluid delivery device is controlled to deliver fluid to the breathing circuit at the threshold flow rate for a predetermined time.

5. The leakage detection method according to claim 1, characterized in that: The breathing circuit is a fluid passage from the fluid output port of the fluid delivery device to the patient access port.

6. The leakage detection method according to claim 1, characterized in that: The threshold flow rate is derived from a user input and is configured to be adjustable.

7. The leakage detection method according to claim 6, characterized in that: The leakage detection method further comprises: The output is a message prompting the user to input the threshold flow rate.

8. The leakage detection method according to any one of claims 1 to 7, characterized in that: The first pressure is a pressure above ambient pressure.

9. A medical device, characterized in that: The medical equipment includes: Breathing circuits, used to provide respiratory support to patients, a pressure sensor connected to the breathing circuit to detect the pressure of the breathing circuit, a fluid delivery device that delivers fluid to the breathing circuit, an input device that receives user input, and A processor, which executes the steps of the method according to any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium for storing a computer program, wherein when the computer program is executed by a computer, the computer executes the method according to any one of claims 1 to 8.

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