A performance testing device and method for a pneumoperitoneum system

Abstract

This invention discloses a performance testing device and method for an insufflation system. The performance testing device for the insufflation system includes a first container, a second container, a lifting structure, a pressure testing device, and a controller. The first container has an upward-facing first opening for holding liquid. The second container is movable in a vertical direction and has a downward-facing second opening. The second container extends into the first opening, and the second opening is located in the liquid to form a liquid surface inside the second container. The second container is also provided with a first vent valve and a second vent valve located above the liquid surface inside the container, as well as an air injection port. The first vent valve and the second vent valve are respectively connected to a first limit switch and a second limit switch, and the first limit switch and the second limit switch have a first limit value and a second limit value, respectively.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a performance testing device and method for a pneumoperitoneum system. Background Technology

[0002] Establishing pneumoperitoneum is fundamental to laparoscopic surgery, and its maintenance depends on the proper functioning of the pneumoperitoneum system. Therefore, the proper functioning of the pneumoperitoneum system is crucial to patient safety, successful surgical completion, and the occurrence of complications. Evaluation of the performance of the pneumoperitoneum system in various aspects is particularly important, especially its pneumatic performance, as the structural parameters of the inflatable cavity directly affect the pneumatic performance of the system.

[0003] However, the current lack of performance testing devices and methods for pneumoperitoneum systems makes it impossible to accurately and uniformly evaluate them. Summary of the Invention

[0004] Therefore, the present invention provides a performance testing device and method for a pneumoperitoneum system, aiming to solve the technical problem that the lack of a performance testing device and method for a pneumoperitoneum system in the prior art leads to the inability to accurately and uniformly evaluate the pneumoperitoneum system.

[0005] To address the aforementioned technical problems, this invention provides a performance testing device for a pneumoperitoneum system, used for testing the pneumoperitoneum system. The performance testing device for the pneumoperitoneum system includes:

[0006] A first container has an upward-facing first opening, and the first container is used to hold liquid;

[0007] The second container is movable in the vertical direction and has a second opening facing downwards. The second container extends into the first opening, and the second opening is located in the liquid to form a liquid surface inside the second container. The second container is also provided with a first vent and a second vent located above the liquid surface inside the container, as well as an air inlet. The first vent and the second vent are respectively equipped with a first vent valve and a second vent valve. The first vent valve and the second vent valve are respectively connected to a first limit switch and a second limit switch. The first limit switch and the second limit switch have a first limit value and a second limit value, and the first limit value is different from the second limit value.

[0008] A lifting structure is connected to the second container drive to drive the second container to move up and down in the vertical direction;

[0009] A pressure detection device, installed on the second container and in communication with the gas above the liquid surface inside the second container, is used to detect the gas pressure above the liquid surface inside the second container; and,

[0010] The controller is electrically connected to both the lifting structure and the pressure detection device.

[0011] Preferably, in the performance testing device of the pneumoperitoneum system, the lifting structure includes a fixed structure, a first gear structure, and a rack structure. The first gear structure is rotatably mounted on the fixed structure. The rack structure extends in the vertical direction and meshes with the first gear structure. The rack structure is fixedly mounted to the second container.

[0012] Preferably, in the performance testing device of the pneumoperitoneum system, the lifting structure further includes a locking structure, which is installed on the fixed structure and can be selectively engaged with the first gear structure or rack structure to restrict the movement of the first gear structure or rack structure. The locking structure is electrically connected to the controller.

[0013] Preferably, in the performance testing device of the pneumoperitoneum system, the locking structure includes a second gear structure and a linear drive structure. The second gear structure is laterally movably mounted on the fixed structure. When the second gear structure is in the released position, it is disengaged from the rack structure. When the second gear structure moves from the released position to the engaged position during its active stroke, it engages with the rack structure to restrict the rack structure from moving vertically. The linear drive structure is driven by the second gear structure to drive the second gear structure to move laterally.

[0014] Preferably, in the performance testing device for the pneumoperitoneum system, the rack structure includes:

[0015] A rack extends vertically and meshes with the first gear structure.

[0016] The movable component is mounted on the fixed structure and is movable in the vertical direction; and,

[0017] A snap-fit ​​component is fixed to the movable component and engages with the rack so as to drive the snap-fit ​​component to move up and down when the rack moves up and down.

[0018] The second container is equipped with a first fixing member, which is fixedly connected to the movable member.

[0019] Preferably, in the performance testing device of the pneumoperitoneum system, the rack structure further includes a pressing member, which is installed on the movable member and located on the side opposite to the rack and the snap-fit ​​member. The pressing member is disposed opposite to the snap-fit ​​member and is pressed against the rack.

[0020] To achieve the above objectives, the present invention also provides a performance testing method for a pneumoperitoneum system. The pneumoperitoneum system has a gas inlet and a gas outlet, the gas inlet being connected to a gas source. The pneumoperitoneum system includes a smoke filtration device, which comprises a suction module, a smoke filtration module, and a gas delivery module connected in sequence. The method is characterized by using the aforementioned performance testing device for the pneumoperitoneum system, and includes the following steps:

[0021] When testing one of the following performance parameters of the pneumoperitoneum system: overpressure release performance, small underpressure compensation performance, or large underpressure compensation performance, the gas inlet of the pneumoperitoneum system is connected to a gas source, and the gas outlet is connected to the gas injection port of the performance testing device for the pneumoperitoneum system; and / or,

[0022] When testing the smoke filtration device of the pneumoperitoneum system, the smoke extraction module of the smoke filtration device is connected to the first vent valve with a first limit switch, and the air supply module is connected to the second vent valve with a second limit switch.

[0023] Preferably, in the performance testing method of the pneumoperitoneum system, the performance testing method of the pneumoperitoneum system includes:

[0024] When testing the overpressure release performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1.

[0025] The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak;

[0026] The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1.

[0027] The lifting structure is controlled to descend rapidly, causing the pressure of the gas above the liquid surface in the container to reach the overpressure release measurement pressure P31. The lifting structure is then locked by the locking structure to continue descending, and timing is started at the same time.

[0028] When the overpressure release measurement pressure P31 exceeds P1 + overpressure release threshold △P, the pneumoperitoneum system will automatically start the venting function. Once the pressure above the liquid surface in the container drops to the first preset pressure value P1, the timing will stop, and the overpressure release time used to evaluate the overpressure release performance will be obtained.

[0029] Preferably, in the performance testing method of the pneumoperitoneum system, the performance testing method of the pneumoperitoneum system includes:

[0030] When testing the low-pressure compensation performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1.

[0031] The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak;

[0032] The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1.

[0033] The lifting structure is controlled to rise rapidly, so that the pressure of the gas above the liquid surface in the container reaches the low underpressure compensation measurement pressure P32. The lifting structure is then locked by the locking structure to continue rising, and the timing is started at the same time.

[0034] When the pressure P32 of the small underpressure compensation measurement is lower than the first preset pressure value P1, the pneumoperitoneum system automatically starts the gas supply compensation function. When the gas pressure above the liquid surface in the container exceeds P1 + overpressure release threshold △P, the pneumoperitoneum system automatically starts the venting function. When the pressure above the liquid surface in the container drops to the first preset pressure value P1, the timing stops, and the small underpressure compensation time used to evaluate the small underpressure release performance is obtained.

[0035] Preferably, in the performance testing method of the pneumoperitoneum system, the performance testing method of the pneumoperitoneum system includes:

[0036] When testing the underpressure compensation performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1.

[0037] The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak;

[0038] The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1.

[0039] Control the second limit switch to run to the maximum limit value, where the maximum limit value is determined based on the leakage rate under the condition of large leakage of clinical gas pressure;

[0040] When the gas pressure above the liquid surface in the second container is lower than the first preset pressure value P1, the pneumoperitoneum system automatically starts the gas supply compensation function. When the gas pressure above the liquid surface in the container exceeds P1 + overpressure release threshold ΔP, the pneumoperitoneum system automatically starts the venting function to reduce the pressure above the liquid surface in the container to the first preset pressure value P1. This cycle continues until the gas pressure above the liquid surface in the second container reaches a dynamic pressure balance near P1. The changes in the gas pressure above the liquid surface in the second container are recorded.

[0041] The underpressure compensation performance of the pneumoperitoneum system is evaluated based on the changes in gas pressure above the liquid surface in the second container.

[0042] The present invention has at least the following beneficial effects:

[0043] The performance testing device for a pneumoperitoneum system provided by the present invention comprises a first container having an upward-facing first opening for holding liquid, and a second container movable in a vertical direction having a downward-facing second opening. The second container extends into the first opening, and the second opening is located in the liquid to form a liquid surface within the second container. The second container is also provided with a first vent valve and a second vent valve located above the liquid surface, as well as an air injection port. The first vent valve and the second vent valve are respectively connected to a first limit switch and a second limit switch, which have a first limit value and a second limit value, respectively. This allows for a more accurate simulation of the abdominal cavity, resulting in more accurate test results when testing the pneumoperitoneum system.

[0044] Furthermore, by setting a first vent valve with a first limit switch and a second vent valve with a second limit switch, when simulating the pneumatic performance test of the pneumoperitoneum system, a slight leak can be simulated by using the first vent valve with the first limit switch. The first limit value can be set to the limit value corresponding to the slight leak, which is simple to operate. A large leak can be simulated by quickly depressurizing using the second vent valve with the second limit switch, making the simulation of the abdominal cavity environment more accurate.

[0045] Furthermore, since the speed at which conventional valves are used to regulate the release pressure may vary with each manual adjustment, leading to changes in the test baseline and even the test results, this invention controls the leakage rate by setting the limit values ​​of the first and second limit switches. This results in faster control and more accurate control.

[0046] Furthermore, for testing the performance of the pneumoperitoneum system, control speed and accuracy are particularly important. The gas pressure above the liquid surface in the second container is detected in real time by a pressure detection device and fed back to the controller. The controller controls the lifting structure to move up and down. On the one hand, it can quickly control according to the real-time pressure situation, ensuring accurate control; on the other hand, it can respond quickly.

[0047] Furthermore, the change in gas pressure above the liquid surface in the second container corresponds to the rise and fall of the lifting structure. Through the electrical connection of the controller, the lifting structure, and the pressure detection device, the controller determines the adjustment amount of the lifting structure that needs to be controlled, enabling more precise control. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 A perspective view of an embodiment of the performance testing device for the pneumoperitoneum system provided by the present invention;

[0050] Figure 2 for Figure 1 A sectional view;

[0051] Figure 3 for Figure 1 A three-dimensional view of the middle section structure;

[0052] Figure 4 for Figure 3 A three-dimensional view of the middle section structure;

[0053] Figure 5 for Figure 1 A three-dimensional view of the middle section structure;

[0054] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0055] Figure 7 This is a schematic diagram showing the switching between the locking structure and the rack in the loosened and engaged states of the present invention.

[0056] Figure 8 This is a schematic diagram of an embodiment in which a portion of the performance testing device for the pneumoperitoneum system provided by the present invention is connected to the pneumoperitoneum system.

[0057] Figure 9This is a schematic diagram of another embodiment of the connection between a portion of the performance testing device for the pneumoperitoneum system provided by the present invention and the pneumoperitoneum system.

[0058] Explanation of reference numerals in the attached figures:

[0059]

[0060]

[0061] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0062] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0064] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0065] Establishing pneumoperitoneum is fundamental to laparoscopic surgery. Maintaining pneumoperitoneum relies on the proper functioning of the pneumoperitoneum system; therefore, its proper operation directly impacts patient safety, surgical success, and the occurrence of complications. The pneumoperitoneum system delivers air into the abdominal cavity. When the intra-abdominal pressure reaches a preset level, the system stops delivering air, and the pressure within the abdominal cavity reaches dynamic equilibrium. However, when the abdominal cavity is subjected to external disturbances, the actual intra-abdominal pressure changes, disrupting this dynamic equilibrium. The pneumoperitoneum system then needs to re-inflate or deflate the abdominal cavity to establish a new dynamic equilibrium. Specifically:

[0066] (1) Overpressure release

[0067] Taking the slight pressure on the abdominal cavity as an example, when the abdominal pressure increases and the actual pressure in the abdominal cavity exceeds a certain preset pressure value (for example, the preset pressure is 15 mmHg, and the actual pressure exceeds the preset pressure by 3 mmHg, that is, the actual pressure is 18 mmHg), the pneumoperitoneum system 300 opens the gas release valve inside the system and starts the gas release function to reduce the abdominal pressure until the actual pressure reaches the preset pressure.

[0068] (2) Small undervoltage compensation

[0069] During surgery, due to issues such as the airtightness of the instruments and the airtightness between the instruments and the abdominal cavity, the air pressure in the abdominal cavity is not kept constant. Instead, there is a slight air pressure leakage, and the actual pressure will decrease, but the decrease is slow and small. At this time, the actual pressure will be lower than the preset pressure (for example, the preset pressure is 15 mmHg, and the actual pressure is lower than 15 mmHg). The pneumoperitoneum system 300 starts the inflation function until the actual pressure in the abdominal cavity reaches the preset pressure, and this process is repeated to maintain the dynamic balance of abdominal cavity pressure.

[0070] (3) Large undervoltage compensation

[0071] In certain special circumstances, if some unforeseen factors occur, such as a new minimally invasive incision being made in the abdominal cavity during surgery, it will cause leakage of air pressure in the abdominal cavity and a decrease in actual pressure. In this case, the air pressure in the abdominal cavity will suddenly drop very quickly and much, and the pneumoperitoneum system 300 will need to restart the inflation function until the actual pressure in the abdominal cavity reaches the preset pressure.

[0072] (4) Smoke circulation filtration

[0073] When treating abdominal diseases, such as electrocautery, smoke is generated in the abdominal cavity. Therefore, CO2 gas mixed with smoke is present in the abdominal cavity. Some pneumoperitoneum systems also have suction and filtration modules. That is, after the mixed gas is extracted from the abdominal cavity, the smoke is filtered to obtain pure CO2 gas before being injected into the abdominal cavity.

[0074] During the factory testing of the pneumoperitoneum system, the above performance characteristics need to be simulated. Please refer to [link / reference needed]. Figures 1 to 4This invention provides a performance testing device 100 for a pneumoperitoneum system 300, which is used to test the pneumoperitoneum system 300. The pneumoperitoneum system 300 has a gas inlet and a gas outlet. The gas inlet is connected to a gas source 400. The performance testing device 100 includes a first container 1 and a second container 2. The first container 1 has a first opening 11 facing upwards and is used to hold liquid 200. The second container 2 is movable in the vertical direction and has a second opening 21 facing downwards. The second container 2 extends into the first opening 11. The second opening 21 is located in the liquid 200 to form a liquid surface inside the second container 2. The second container 2 is also provided with a vent valve located above the liquid surface inside the container and an injection port 24. The injection port 24 is used to connect to the gas outlet.

[0075] When it is necessary to test the overpressure release performance, small underpressure compensation performance, and large underpressure compensation performance of the pneumoperitoneum system 300, connect the gas output port of the pneumoperitoneum system 300 to the gas injection port 24.

[0076] The first container 1 can be a box containing liquid 200, which can be water or other liquids 200, without specific limitations. The shape of the first container 1 can be cylindrical or square, without specific limitations, and can be set according to actual needs. In this embodiment, the first container 1 is a cuboid structure.

[0077] The second container 2 is used to simulate the abdominal cavity. It can be an inverted box structure or a container with a second opening 21 at the bottom and a closed top. In this embodiment, the second container 2 is a hollow container with a second opening 21 at one end and a closed top. During installation, the second container 2 is inverted inside the first container 1, with the second opening 21 located in the liquid 200 within the second container 2. The second opening 21 of the second container 2 is immersed below the liquid surface of the first container 1. The second container 2 divides the liquid surface into an inner liquid surface and an outer liquid surface. The area above the inner liquid surface in the second container 2 is the gas portion, and the area below the inner liquid surface is the liquid 200. The second container 2 can move up and down, thus compressing or releasing the gas above the liquid surface inside the second container 2. When the gas (usually air) above the liquid surface inside the container is compressed, the volume above the liquid surface inside the container decreases, and the pressure of the gas above the liquid surface inside the second container 2 will increase. When the gas (usually air) above the liquid surface inside the container is released, the volume above the liquid surface inside the container increases, and the pressure of the gas above the liquid surface inside the second container 2 will increase.

[0078] Before the test begins (without external pressure applied), the gas pressure inside and outside the second container 2 is equal, so the liquid levels inside and outside the second container 2 remain horizontal. At the start of the test, the pressure of the gas above the second container 2 can be changed by moving the second container 2 up and down. For example, when the second container 2 is moved rapidly downwards, the gas inside the second container 2 is compressed, its volume decreases, and the pressure of the gas above the second container 2 will increase.

[0079] In addition, the performance testing device 100 of the pneumoperitoneum system also includes a pressure testing device 4 installed on the second container 2. The pressure testing device 4 is in communication with the gas above the liquid surface inside the second container 2 and is used to detect the pressure value of the gas above the liquid surface inside the second container 2. The pressure testing device 4 can be a pressure gauge or a pressure gauge.

[0080] The second container 2 is provided with a vent located above the liquid surface inside the container. A vent valve is installed on the vent, and the vent valve is connected to a limit switch to control the opening rate of the vent valve. The limit value of the limit switch matches the gas pressure leakage value. Since the vent valve is used to regulate the pressure release rate, if the opening of the valve is not adjusted manually each time, causing changes in the test baseline, and even when testing the pressure compensation performance under different underpressure baselines, the pressure release is controlled by the intuitive feeling of manually adjusting the valve's rotation, which can easily lead to inaccurate test results. This invention solves this problem by setting a limit switch on the vent valve, controlling the opening range of the vent valve by setting the limit value of the limit switch. For example, if the gas leakage rate needs to be controlled to be A, and the corresponding limit switch limit value is B, the gas leakage rate will be exactly at A. Therefore, simply setting the limit value of the vent valve's limit switch to B will satisfy the gas leakage rate of A, without needing to rely on the intuitive feeling of manually adjusting the valve's rotation to release pressure.

[0081] Because slight leakage may occur in clinical settings, in this embodiment, the second container 2 is provided with a first vent and a second vent. A first vent valve 22 and a second vent valve 23 are respectively installed on the first and second vent ports. The first vent valve 22 and the second vent valve 23 are respectively connected to a first limit switch and a second limit switch. The first limit switch and the second limit switch each have a first limit value and a second limit value, which are different. To further increase the accuracy of operation, either the first vent valve 22 with the first limit switch or the second vent valve 23 with the second limit switch is used for releasing pressure at a small flow rate, and the other is used for releasing pressure at a large flow rate. In this embodiment, the first limit switch is used to control the pressure release at a small flow rate, and the second limit switch is used to control the pressure release at a large flow rate. Accordingly, the first limit switch has a small limit value, and the second limit switch has a large limit value. When testing the overpressure release time of a small release pressure, the first limit switch is controlled to run to the corresponding small limit value. At this time, the pressure in the second container 2 will gradually be released to the outside through the first vent valve 22 with the first limit switch. When testing the compensation time of a large underpressure compensation pressure, the second limit switch is controlled to run to the corresponding large limit value. At this time, the pressure in the second container 2 will be quickly released to the outside through the second vent valve 23 with the second limit switch. Furthermore, the opening size of the pressure relief valve is controlled by setting the limit values ​​of the limit switches. For example, if the first limit switch has a limit value d1, then when the first limit switch reaches the limit value d1, the opening degree of the pressure relief valve is D1; ​​if the first limit switch has two limit values ​​d1 and d2, then when the first limit switch reaches the limit values ​​d1 and d2, the opening degrees of the pressure relief valve are D1 and D2 respectively. It should be noted that the opening degree of the pressure relief valve is the same as the opening amplitude of the pressure relief valve.

[0082] Furthermore, the limit values ​​of the first and second limit switches can be configured with multi-level adjustment functions. For example, the first limit switch can be configured with two levels: a small limit value and a large limit value. In this way, the first limit switch can simulate both small and large undervoltage compensation. Similarly, the second limit switch can also be configured with two levels of adjustment: a small limit value and a large limit value. In other embodiments, the number of adjustment levels of the first and second limit switches can also be set according to actual needs.

[0083] It should be noted that the minimum and maximum limits mentioned in this invention can be set based on actual clinical gas pressure leakage values. For example, slight leakage may occur clinically, and the limit corresponding to this leakage rate can be used as the minimum limit. The maximum limit can also be set based on the leakage rate required for rapid leakage in clinical practice. The minimum and maximum limits can also be factory-set based on common experience. Typically, the minimum and maximum limits are set to fixed values, so that controlling the movement to these fixed values ​​ensures the consistency of each test.

[0084] When the performance testing device 100 of the pneumoperitoneum system is used to test the pneumoperitoneum system 300, the gas inlet of the pneumoperitoneum system 300 is connected to the gas source 400, and the gas outlet is connected to the gas injection port 24. Specifically, one end of the gas delivery pipe is connected to the gas outlet, and the other end is connected to the gas injection port 24. This allows for testing of the overpressure release performance, small underpressure compensation performance, and large underpressure compensation performance of the pneumoperitoneum system 300. When the performance testing device 100 of the pneumoperitoneum system 300 is used to test the smoke filter device, the suction module 311 of the smoke filter device can be connected to the first vent valve 22 with a first limit switch, and the delivery module 313 can be connected to the second vent valve 23 with a second limit switch. A smoke filter module 312 is provided between the suction module 311 and the delivery module 313. This allows for testing of the smoke filter device of the pneumoperitoneum system 300.

[0085] Since moving the second container 2 up and down can change the pressure value of the gas above the liquid surface inside the second container 2, in order to facilitate faster control of the rise and fall of the second container 2, the performance testing device 100 of the pneumoperitoneum system also includes a lifting structure 3. The lifting structure 3 is driven to the second container 2 so as to drive the second container 2 to rise and fall in the up and down direction.

[0086] The lifting structure 3 can be configured in various ways, including pneumatic (e.g., cylinder), manual, or electric. In this embodiment, the lifting structure 3 includes a fixed structure 31, a first gear structure 32, and a rack structure 33. The first gear structure 32 is rotatably mounted on the fixed structure 31. The rack structure 33 extends vertically and meshes with the first gear structure 32. The second container 2 is fixedly mounted to the rack structure 33.

[0087] The fixing structure 31 can be a fixing seat, a fixing plate, or a fixing frame, etc., and there are no specific limitations here. The fixing structure 31 can be fixed together with the first container 1 on a certain mounting base, or the fixing structure 31 can be installed on the first container 1 (for example, fixed on the side wall of the first container 1). The specific setting can be set as needed, and there are no specific limitations here.

[0088] The first gear structure 32 can be rotated manually or electrically. Taking manual drive as an example, a handwheel 35 can be installed on the first gear structure 32. Rotating the handwheel 35 drives the first gear structure 32 to rotate, which in turn moves the rack structure 33 vertically. For example, if the preset pressure is 15 mmHg, the pneumoperitoneum system 300 will deliver gas above the liquid surface in the container at a pressure of 15 mmHg. When testing for "overpressure release," the actual pressure of the gas above the liquid surface in the container needs to be suddenly increased to 20 mmHg by rotating the handwheel 35. The pneumoperitoneum system 300 will then trigger a venting function to reduce the actual pressure back to 15 mmHg. Taking electric control of the first gear structure 32 as an example, a drive motor can be installed and connected to the first gear structure 32. The drive motor drives the first gear structure 32 to rotate, and the forward and reverse rotation of the drive motor controls the forward and reverse rotation of the first gear structure 32, thereby moving the rack structure 33 vertically.

[0089] Specifically, the rack structure 33 can be configured in various ways, such as a rigid straight rack or a toothed belt with toothed structures. The rack can be elongated or annular, and the specific configuration can be determined according to requirements.

[0090] Please see Figures 4 to 6The rack structure 33 includes a rack 331, a movable member 332, and a locking member 333. The rack 331 extends vertically and meshes with the first gear structure 32. The movable member 332 is mounted on the fixed structure 31 and can move vertically. The locking member 333 is fixed to the movable member 332 and engages with the rack 331, so that the locking member 333 moves vertically when the rack 331 moves vertically. A first fixing member 334 is mounted on the second container 2, and the first fixing member 334 is fixedly mounted to the movable member 332. When the first gear structure 32 rotates, it drives the rack 331 to move vertically, thereby driving the locking member 333 to move vertically. Since the locking member 333 is fixed to the movable member 332, the movable member 332 moves vertically, which in turn drives the second container 2 to move vertically via the first fixing member 334. In addition, the rack structure 33 also includes a crimping member 335, which is mounted on the movable member 332 and located on the opposite side of the rack 331 and the snap-fit ​​member 333. The crimping member 335 is disposed opposite to the snap-fit ​​member 333 and crimps onto the rack 331. To ensure the stability of the snap-fit ​​member 333 and the rack 331, especially when the rack structure 33 is a toothed belt structure, the crimping member 335 is crimped onto the rack 331, and the rack 331 is located between the crimping member 335 and the snap-fit ​​member 333, which can further ensure the stability of the fit.

[0091] The fixed structure 31 is provided with a sliding part extending in the vertical direction, and the movable part 332 is provided with a mating part that slides and engages with the sliding part. One of the sliding part and the mating part is a slide rail 311, and the other is a slide groove. In this embodiment, the fixed structure 31 is provided with a slide rail 311 extending in the vertical direction, and the movable part 332 is provided with a slide groove extending in the vertical direction. The engagement of the slide rail 311 and the slide groove ensures that the trajectory of the movable part 332 is fixed during vertical movement, further improving control precision and ensuring the accuracy of the test to a certain extent.

[0092] Additionally, please see Figure 7 The lifting structure 3 further includes a locking structure 34, which is mounted on the fixed structure 31 and used to restrict the lifting structure 3 from rising or falling. Specifically, the locking structure 34 is engaged with, and can be selectively engaged with, the first gear structure 32 or the rack structure 33 to restrict the movement of the first gear structure 32 or the rack structure 33. Thus, when the rack 331 moves to a preset position, the locking structure 34 can engage with the first gear structure 32 or the rack structure 33 to restrict its movement. The locking structure 34 can be driven by a linear drive structure 342.

[0093] Specifically, the performance testing device 100 of the pneumoperitoneum system also includes a controller. The controller is electrically connected to the linear drive structure 342 and also electrically connected to the pressure detection device 4 that detects the pressure inside the second container 2. When the gas pressure above the liquid surface in the second container 2 reaches a preset value, the controller controls the linear drive structure 342 to drive the locking structure 34 to engage with the first gear structure 32 or the rack structure 33, restricting the movement of the first gear structure 32 or the rack structure 33, thereby limiting the rack 331 from continuing to rise or fall. With a preset gas pressure above the liquid surface in the second container 2 of 15 mmHg, the pneumoperitoneum system 300 delivers gas to the pressure above the liquid surface in the container to 15 mmHg. When testing the "overpressure release" performance, the lifting structure 3 moves downwards, rapidly increasing the pressure above the liquid surface in the container to 20 mmHg. At this point, the pressure detection device 4 detects that the pressure has reached 20 mmHg, and the controller controls the locking structure 34 to lock, restricting the lifting structure 3 from continuing to move up or down.

[0094] It should be noted that, due to the high requirements for control speed during testing, in order to avoid a time difference when the locking structure 34 locks, for example, in the above example, when the pressure detection device 4 detects that the pressure reaches 20 mmHg, the controller controls the locking structure 34 to lock. In order to avoid the lifting structure 3 continuing to move during the time between the controller controlling the locking structure 34 to lock and the locking structure 34 fully locking the first gear structure 32 or rack structure 33, causing a certain difference between the pressure above the liquid surface in the container and 20 mmHg (for example, it may actually be adjusted to 21 mmHg), the pressure detection device 4 usually controls the locking structure 34 to lock when the detected pressure is close to the target pressure value. In specific settings, the threshold value controlled by the difference between the pressure value detected by the pressure detection device 4 and the target pressure value can be calculated based on the rate of ascent or descent of the lifting structure 3.

[0095] Specifically, please refer to Figure 1 and Figure 7The locking structure 34 includes a second gear structure 341, which is laterally movably mounted on the fixed structure 31. When the second gear structure 341 is in the released position, it is disengaged from the rack structure 33. When the second gear structure 341 moves from the released position to the engaged position during its active stroke, it engages with the rack structure 33 to restrict the rack structure 33 from moving vertically. The locking structure 34 also includes a linear drive structure 342, which is driven by the second gear structure 341 to drive the second gear structure 341 to move laterally. The linear drive structure 342 is electrically connected to a controller. The lateral movement of the second gear structure 341 can be driven by a cylinder or other linear drive structure 342, without specific limitations. For ease of explanation, the following description uses the locking structure 34 locking the rack structure 33 as an example, but it does not mean that the locking structure 34 can only lock the rack structure 33.

[0096] More specifically, when it is necessary to move the second container 2 upward to adjust the gas pressure above the liquid surface inside the second container 2, the controller controls the drive motor to rotate, which drives the second gear structure 341 to rotate, and drives the rack structure 33 to move upward. When the pressure detection device 4 detects that the gas pressure above the liquid surface inside the second container 2 has reached a preset value, the controller controls the drive motor to stop driving, and at the same time, the controller controls the locking structure 34 to move to the engagement position to lock the rack structure 33. In this way, the lifting structure 3 can be prevented from moving upward and maintained in this state.

[0097] When it is necessary to move the second container 2 downward to adjust the gas pressure above the liquid surface inside the second container 2, the controller controls the drive motor to rotate in the opposite direction, which drives the second gear structure 341 to rotate in the opposite direction, and drives the rack structure 33 to move downward. When the pressure detection device 4 detects that the gas pressure above the liquid surface inside the second container 2 has reached the preset value, the controller controls the drive motor to stop driving, and at the same time, the controller controls the locking structure 34 to move to the engagement position to lock the rack structure 33. In this way, the lifting structure 3 can be prevented from continuing to descend and can be maintained in this state.

[0098] This invention provides a first container 1 with an upward-facing first opening 11 for holding liquid 200. A second container 2 is movable vertically and has a downward-facing second opening 21. The second container 2 extends into the first opening 11, and the second opening 21 is located within the liquid 200 to form a liquid surface within the second container 2. The second container 2 is also equipped with a first vent valve 22 and a second vent valve 23 located above the liquid surface, as well as an air inlet 24. The first vent valve 22 and the second vent valve 23 are respectively connected to a first limit switch and a second limit switch, which have a first limit value and a second limit value, respectively. This allows for a more accurate simulation of the abdominal cavity, resulting in more accurate detection results when testing the pneumoperitoneum system 300.

[0099] Furthermore, by setting a first vent valve 22 with a first limit switch and a second vent valve 23 with a second limit switch, when testing the pneumatic performance of the simulated pneumoperitoneum system 300, a slight leak can be simulated by using the first vent valve 22 with the first limit switch. The first limit value can be set to the limit value corresponding to the slight leak, which is simple to operate. A large leak can be simulated by quickly depressurizing using the second vent valve 23 with the second limit switch, making the simulation of the abdominal cavity environment more accurate.

[0100] Furthermore, since the speed at which conventional valves are used to regulate the release pressure may vary with each manual adjustment, leading to changes in the test baseline and even the test results, this invention controls the leakage rate by setting the limit values ​​of the first and second limit switches. This results in faster control and more accurate control.

[0101] Furthermore, for the performance testing of the pneumoperitoneum system 300, control speed and control accuracy are particularly important. The pressure detection device 4 detects the gas pressure above the liquid surface in the second container 2 in real time and feeds it back to the controller. The controller controls the lifting structure 3 to rise and fall. On the one hand, it can quickly control according to the real-time pressure situation and control accurately; on the other hand, it can respond quickly.

[0102] Furthermore, the gas pressure change above the liquid surface in the second container 2 corresponds to the rise and fall of the lifting structure 3. Through the electrical connection of the controller, the lifting structure 3, and the pressure detection device 4, the controller can determine the adjustment amount of the lifting structure 3 that needs to be controlled, thus enabling more precise control.

[0103] The following details the testing of the pneumoperitoneum system 300 using the performance testing device 100.

[0104] Please see Figure 8When testing the overpressure release performance, small underpressure compensation performance, and large underpressure compensation performance of the pneumoperitoneum system 300, the gas inlet of the pneumoperitoneum system 300 is connected to the gas source 400 (in this embodiment, the gas source 400 is a CO2 gas source; for ease of explanation, the following description uses CO2 gas source 400 as an example, but does not imply that the gas source 400 is limited to CO2 gas source), and the gas outlet is connected to the gas injection port 24. Specifically, the gas outlet and the gas injection port 24 can be connected to the two ends of the gas delivery pipe, respectively.

[0105] 1) Overpressure release performance test

[0106] Turn on the CO2 gas source and the pneumoperitoneum system 300, and set the preset pressure of the pneumoperitoneum system 300 to the first preset pressure value P1 (i.e., the desired pressure value above the liquid surface in the second container 2). The flow rate of the pneumoperitoneum system 300 can be set to the maximum allowable flow rate, or it can be set according to the test requirements.

[0107] The first limit switch is controlled to operate to the minimum limit value, so that the first vent valve 22 maintains a slight leakage to simulate a clinical slight leakage state.

[0108] When the pneumoperitoneum system 300 is activated, the liquid level inside the second container 2 drops and the liquid level outside the container rises until the gas pressure above the liquid level inside the container reaches pressure P2 and remains stable. P2 is close to or equal to P1. Ideally, P2 is equal to P1, but the instrument may have errors, so there may be some difference between P2 and P1. It is sufficient to ensure that it is within the error range.

[0109] The second container 2 is controlled to suddenly descend within a short period of time (usually a few seconds or even less). At this time, the gas above the liquid surface inside the second container 2 is suddenly compressed, and the gas pressure above the liquid surface inside the container will suddenly increase beyond P2. Specifically, the lifting structure 3 is controlled to descend rapidly, so that the gas pressure above the liquid surface inside the container reaches the overpressure release measurement pressure P31. At this time, the lifting structure 3 is locked by the locking structure 34 to continue descending, and the timing is started at the same time (it can be a timer). Assume the initial time is T01.

[0110] The overpressure release threshold of the pneumoperitoneum system 300 is ΔP. ​​When the overpressure release measurement pressure P31 exceeds P1+ΔP, the pneumoperitoneum system 300 will automatically start the venting function, thereby reducing the pressure above the liquid surface in the container to the first preset pressure value P1; the timer will be turned off simultaneously, and the overpressure release completion time will be T11. The overpressure release time is ΔT1=T11-T01.

[0111] The overpressure release time ΔT1 reflects the overpressure release performance of the pneumoperitoneum system 300; the shorter the time, the better the overpressure release performance.

[0112] 2) Low undervoltage compensation performance test

[0113] Turn on the CO2 gas source and the pneumoperitoneum system 300, and set the preset pressure of the pneumoperitoneum system 300 to the first preset pressure value P1 (i.e., the desired pressure value above the liquid surface in the second container 2). The flow rate of the pneumoperitoneum system 300 can be set to the maximum allowable flow rate, or it can be set according to the test requirements.

[0114] The first limit switch is controlled to operate to the minimum limit value, so that the first vent valve 22 maintains a slight leakage to simulate a clinical slight leakage state.

[0115] When the pneumoperitoneum system 300 is activated, the liquid level inside the second container 2 drops and the liquid level outside the container rises until the gas pressure above the liquid level inside the container reaches pressure P2 and remains stable. P2 is close to or equal to P1. Ideally, P2 is equal to P1, but the instrument may have errors, so there may be some difference between P2 and P1. It is sufficient to ensure that it is within the error range.

[0116] The second container 2 is controlled to rise suddenly in a short period of time (usually a few seconds or even less). At this time, the gas pressure above the liquid surface inside the second container 2 will suddenly drop below P2. Specifically, the lifting structure 3 is controlled to rise rapidly so that the gas pressure above the liquid surface inside the container reaches the small underpressure compensation measurement pressure P32. At this time, the lifting structure 3 is locked by the locking structure 34 to continue rising, and the timing is started at the same time (it can be a timer). Assume the initial time is T02.

[0117] When the pressure measured by the small underpressure compensation P32 is lower than the first preset pressure value P1, the pneumoperitoneum system 300 automatically starts the air supply compensation function, thereby increasing the pressure to the first preset pressure value P1, and the pressure will rise further; the overpressure release threshold of the pneumoperitoneum system 300 is ΔP. ​​When the actual pressure exceeds P1+ΔP at this time, the pneumoperitoneum system 300 automatically starts the venting function, thereby reducing the pressure above the liquid surface in the container to the first preset pressure value P1; the timer is turned off simultaneously, the small underpressure compensation end time is recorded as T12, and the time change ΔT2=T12-T02.

[0118] The undervoltage compensation time ΔT2 reflects the undervoltage compensation performance of the pneumoperitoneum system 300. The shorter the time, the better the undervoltage compensation performance.

[0119] 3) Undervoltage compensation performance test

[0120] Turn on the CO2 gas source and the pneumoperitoneum system 300, and set the preset pressure of the pneumoperitoneum system 300 to the first preset pressure value P1 (i.e., the desired pressure value above the liquid surface in the second container 2). The flow rate of the pneumoperitoneum system 300 can be set to the maximum allowable flow rate, or it can be set according to the test requirements.

[0121] The first limit switch is controlled to operate to the minimum limit value, so that the first vent valve 22 maintains a slight leakage to simulate a clinical slight leakage state.

[0122] When the pneumoperitoneum system 300 is activated, the liquid level inside the second container 2 drops and the liquid level outside the container rises until the gas pressure above the liquid level inside the container reaches pressure P2 and remains stable. P2 is close to or equal to P1. Ideally, P2 is equal to P1, but the instrument may have errors, so there may be some difference between P2 and P1. It is sufficient to ensure that it is within the error range.

[0123] The second limit switch is controlled to operate to the maximum limit value, keeping the second vent valve 23 in a large leakage state to simulate a clinical large leakage state (usually a sudden situation). The maximum limit value is determined according to the leakage rate during a clinical large gas pressure leakage state.

[0124] At this moment, the gas pressure above the liquid surface in the second container 2 suddenly drops below the first preset pressure value P1. The pneumoperitoneum system 300 automatically activates the gas supply compensation function, increasing the gas pressure above the liquid surface in the second container 2 back to the first preset pressure value P1, and the pressure will rise further. The overpressure release threshold of the pneumoperitoneum system 300 is ΔP. ​​When the actual pressure exceeds P1 + ΔP, the pneumoperitoneum system 300 automatically activates the venting function, thereby reducing the pressure above the liquid surface in the container to the first preset pressure value P1. Since the gas released by the second vent valve 23 with the second limit switch is relatively large, the actual pressure will continue to drop below P1, and the pneumoperitoneum system 300 will activate the gas supply compensation function again. This cycle repeats, forming a dynamic pressure balance near P1.

[0125] At this point, observe and record the changes in the pressure gauge readings. By observing the change curves, you can determine the quality of the underpressure compensation performance of different pneumoperitoneum systems.

[0126] 4) Testing of smoke filtration devices

[0127] It should be noted that you should refer to [link / reference]. Figure 9 The smoke filtration device for the pneumoperitoneum system 300 typically includes an air extraction module 311, a smoke filtration module 312, and an air supply module 313. Specifically, the air extraction module 311, the smoke filtration module 312, and the air supply module 313 are connected in sequence.

[0128] When testing the smoke filter device, the smoke filter device’s extraction module 311 is connected to the first vent valve 22 with a first limit switch, and the air supply module 313 is connected to the second vent valve 23 with a second limit switch.

[0129] When testing the smoke filtration device, the first vent valve 22 with the first limit switch and the second vent valve 23 with the second limit switch are opened simultaneously.

[0130] When the pneumoperitoneum system 300 is activated, the extraction module 311 draws out gas containing smoke (usually CO2 gas) from the second container 2. After being filtered by the filtration module, the gas is then reintroduced into the second container 2. The effectiveness of the smoke filtration can be observed by monitoring the purity of the gas in the second container 2.

[0131] Alternatively, a timer can be set to record the time T from the start of the smoke filtration function of the pneumoperitoneum system 300 until the gas is purified. The shorter T is, the better the smoke filtration effect. Or, the purity of the gas in the second container 2 can be observed after a preset time. The purer the gas is at this time, the better the smoke filtration effect.

[0132] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. Based on the embodiments of the present invention, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the scope of protection of the present invention.

Claims

1. A performance testing device for a pneumoperitoneum system, used for testing the pneumoperitoneum system, characterized in that, The performance testing device for the pneumoperitoneum system includes: A first container has an upward-facing first opening, and the first container is used to hold liquid; The second container is movable in the vertical direction and has a second opening facing downwards. The second container extends into the first opening, and the second opening is located in the liquid to form a liquid surface inside the second container. The second container is also provided with a first vent and a second vent located above the liquid surface inside the container, as well as an air inlet. The first vent and the second vent are respectively equipped with a first vent valve and a second vent valve. The first vent valve and the second vent valve are respectively connected to a first limit switch and a second limit switch. The first limit switch and the second limit switch have a first limit value and a second limit value, and the first limit value is different from the second limit value. A lifting structure is connected to the second container drive to drive the second container to move up and down in the vertical direction; A pressure detection device, installed on the second container and in communication with the gas above the liquid surface inside the second container, is used to detect the gas pressure above the liquid surface inside the second container; and, The controller is electrically connected to both the lifting structure and the pressure detection device.

2. The performance testing device for the pneumoperitoneum system as described in claim 1, characterized in that, The lifting structure includes a fixed structure, a first gear structure, and a rack structure. The first gear structure is rotatably mounted on the fixed structure. The rack structure extends in the vertical direction and meshes with the first gear structure. The rack structure is fixedly mounted to the second container.

3. The performance testing device for the pneumoperitoneum system as described in claim 2, characterized in that, The lifting structure also includes a locking structure, which is installed on the fixed structure and can be selectively engaged with the first gear structure or rack structure to restrict the movement of the first gear structure or rack structure. The locking structure is electrically connected to the controller.

4. The performance testing device for the pneumoperitoneum system as described in claim 3, characterized in that, The locking structure includes a second gear structure and a linear drive structure. The second gear structure is laterally movably mounted on the fixed structure. When the second gear structure is in the released position, it is disengaged from the rack structure. When the second gear structure moves from the released position to the engaged position during its active stroke, it engages with the rack structure to restrict the rack structure from moving vertically. The linear drive structure is driven by the second gear structure to drive the second gear structure to move laterally.

5. The performance testing device for the pneumoperitoneum system as described in claim 2, characterized in that, The rack structure includes: A rack extends vertically and meshes with the first gear structure. The movable component is mounted on the fixed structure and is movable in the vertical direction; and, A snap-fit ​​component is fixed to the movable component and engages with the rack so as to drive the snap-fit ​​component to move up and down when the rack moves up and down. The second container is equipped with a first fixing member, which is fixedly connected to the movable member.

6. The performance testing device for the pneumoperitoneum system as described in claim 5, characterized in that, The rack structure further includes a crimping member, which is mounted on the movable member and located on the side opposite to the rack and the snap-fit ​​member. The crimping member is disposed opposite to the snap-fit ​​member and crimps onto the rack.

7. A method for testing the performance of a pneumoperitoneum system, the pneumoperitoneum system having a gas inlet and a gas outlet, the gas inlet being connected to a gas source, the pneumoperitoneum system including a smoke filtration device, the smoke filtration device including a suction module, a smoke filtration module, and a gas delivery module connected in sequence, characterized in that, The performance testing of the pneumoperitoneum system is performed using the performance testing device described in any one of claims 1 to 6, wherein the performance testing method of the pneumoperitoneum system includes: When testing one of the following performance parameters of the pneumoperitoneum system: overpressure release performance, small underpressure compensation performance, or large underpressure compensation performance, the gas inlet of the pneumoperitoneum system is connected to a gas source, and the gas outlet is connected to the gas injection port of the performance testing device for the pneumoperitoneum system; and / or, When testing the smoke filtration device of the pneumoperitoneum system, the air extraction module of the smoke filtration device is connected to the first vent valve of the first limit switch, and the air delivery module is connected to the second vent valve of the second limit switch.

8. The performance testing method for the pneumoperitoneum system as described in claim 7, characterized in that, The performance testing method for the pneumoperitoneum system includes: When testing the overpressure release performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1. The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak; The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1. The lifting structure is controlled to descend rapidly, causing the pressure of the gas above the liquid surface in the container to reach the overpressure release measurement pressure P31. The lifting structure is then locked by the locking structure to continue descending, and timing is started at the same time. When the overpressure release measurement pressure P31 exceeds the sum of P1 and the overpressure release threshold ΔP, the pneumoperitoneum system will automatically start the venting function. Once the pressure above the liquid surface in the container drops to the first preset pressure value P1, the timing will stop, and the overpressure release duration used to evaluate the overpressure release performance will be obtained.

9. The performance testing method for the pneumoperitoneum system as described in claim 7, characterized in that, The performance testing method for the pneumoperitoneum system includes: When testing the low-pressure compensation performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1. The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak; The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1. The lifting structure is controlled to rise rapidly, so that the pressure of the gas above the liquid surface in the container reaches the low underpressure compensation measurement pressure P32. The lifting structure is then locked by the locking structure to continue rising, and the timing is started at the same time. When the pressure P32 of the small underpressure compensation measurement is lower than the first preset pressure value P1, the pneumoperitoneum system automatically starts the gas supply compensation function. When the gas pressure above the liquid surface in the container exceeds the sum of P1 and the overpressure release threshold ΔP, the pneumoperitoneum system automatically starts the venting function. When the pressure above the liquid surface in the container drops to the first preset pressure value P1, the timing stops, and the small underpressure compensation time used to evaluate the small underpressure release performance is obtained.

10. The performance testing method for the pneumoperitoneum system as described in claim 7, characterized in that, The performance testing method for the pneumoperitoneum system includes: When testing the underpressure compensation performance of the pneumoperitoneum system, turn on the air source connected to the pneumoperitoneum system, set the flow rate of the pneumoperitoneum system to the maximum allowable value, and set the preset pressure of the pneumoperitoneum system to the first preset pressure value P1. The first limit switch is controlled to operate to the minimum limit value, wherein the minimum limit value is determined based on the leakage rate during a minor clinical leak; The pneumoperitoneum system is activated to deliver air until the gas pressure above the liquid surface in the container reaches pressure P2 and then remains stable, where P2 is close to or equal to P1. Control the second limit switch to run to the maximum limit value, where the maximum limit value is determined based on the leakage rate under the condition of large leakage of clinical gas pressure; When the gas pressure above the liquid surface in the second container is lower than the first preset pressure value P1, the pneumoperitoneum system automatically starts the gas supply compensation function. When the gas pressure above the liquid surface in the container exceeds the sum of P1 and the overpressure release threshold ΔP, the pneumoperitoneum system automatically starts the venting function to reduce the pressure above the liquid surface in the container to the first preset pressure value P1. This cycle continues until the gas pressure above the liquid surface in the second container reaches a dynamic pressure balance near P1. The changes in the gas pressure above the liquid surface in the second container are recorded. The underpressure compensation performance of the pneumoperitoneum system is evaluated based on the changes in gas pressure above the liquid surface in the second container.

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