Surgical gas supply system and control method for a pneumoperitoneum machine

Abstract

This invention provides a surgical gas supply system and a control method for an insufflator. The surgical gas supply system includes a circulating gas supply path, a circulating gas return path, a downstream airtight branch that can be selectively connected to or disconnected from the insufflator, a pump, a smoke exhaust valve, and a controller. The controller is configured to: start the pump; when the airtight branch is disconnected from the insufflator, open the smoke exhaust valve to allow insufflator gas recovered from the circulating gas return path to flow back to the insufflator via the pump; when the airtight branch is connected to the insufflator, close the smoke exhaust valve to allow insufflator gas recovered from the circulating gas return path to flow back to the insufflator via the pump via the airtight branch. The surgical gas supply system provided by this invention allows for continuous gas circulation via the pump during the maintenance of pressure within the insufflator. The insufflator can seamlessly and flexibly adjust its operating state according to changes in pressure within the insufflator, preventing pressure fluctuations within the insufflator caused by the pump's start-stop during mid-inflation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a surgical air supply system and a control method for an insufflator. Background Technology

[0002] With the increasing prevalence of endoscopic surgeries, such as minimally invasive laparoscopic surgery, laparoscopic surgery is becoming an inevitable trend and direction in the development of minimally invasive surgical methods. An insufflator is one of the essential medical devices in laparoscopic surgery, used to introduce a gaseous medium (such as carbon dioxide) into the patient's abdominal cavity and maintain a certain pressure, providing the surgeon with a good field of vision and sufficient operating space.

[0003] During the operation of the insufflator, factors such as air leakage in the cavity, artificial smoke extraction, and external pressure can cause changes in the pressure inside the abdominal cavity. Therefore, the insufflator needs to flexibly adjust its working state according to the changes in the pressure inside the abdominal cavity. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a surgical gas supply system and a control method for an insufflator, which can maintain the circulation of gas in the insufflator while maintaining abdominal pressure, so as to flexibly and timely adjust the pressure in the abdominal cavity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A surgical gas supply system, comprising:

[0007] Circulating gas supply path;

[0008] Recirculating air return path;

[0009] The downstream of the airtight branch can be selectively connected to or disconnected from the pneumatic ventilator;

[0010] The pump has its air inlet connected to the circulating return air passage and its air outlet connected to the circulating air supply passage and the airtight branch respectively.

[0011] A smoke exhaust valve is connected between the circulating air supply passage and the airtight branch;

[0012] The controller is configured as follows:

[0013] Start the pump;

[0014] With the airtight branch disconnected from the pneumatic abdomen, the exhaust valve is opened, allowing the pneumatic abdomen gas recovered from the circulating return gas passage to flow back to the pneumatic abdomen through the pump and the circulating gas supply passage.

[0015] With the airtight branch connected to the pneumatic abdomen, the exhaust valve is closed, allowing the pneumatic abdomen gas recovered from the circulating return gas passage to flow back to the pneumatic abdomen via the pump after passing through the airtight branch.

[0016] As one embodiment, the surgical air supply system further includes a first air supply valve, which is located on the circulating air supply passage.

[0017] The controller is configured to:

[0018] Close the first gas supply valve;

[0019] The pressure downstream of the first air supply valve in the circulating air supply path is detected as the pneumoperitoneum pressure.

[0020] Open the first air supply valve.

[0021] As one embodiment, the surgical air supply system further includes an inflation passage that can be selectively connected to the circulating air supply passage, the inflation passage being supplied with air by an air source;

[0022] The controller is also configured to:

[0023] Measure the pressure in pneumoperitoneum;

[0024] In response to the pneumoperitoneum pressure being lower than the preset pressure, the inflation passage is controlled to inflate the circulating air supply passage;

[0025] Inflation stops when the pneumoperitoneum pressure reaches the preset pressure.

[0026] As one embodiment, the surgical air supply system further includes an air inlet valve and an outlet first pressure relief valve that connect the air inlet of the pump.

[0027] The controller is also configured to operate when the gas-tight branch is disconnected from the pneumatic ventilator:

[0028] Before detecting the pneumoperitoneum pressure, close the exhaust valve and open the ventilation valve and the first pressure relief valve;

[0029] During the process of controlling the inflation passage to inflate the circulating air supply passage:

[0030] Keep the exhaust valve closed to fill the circulating gas supply passage with gas;

[0031] Close the vent valve to allow the outside gas collected from the pump's inlet to be discharged through the first pressure relief valve;

[0032] Once it is confirmed that the outside gas collected from the pump's inlet has been exhausted, the first pressure relief valve is closed, and the exhaust valve is opened.

[0033] In one implementation, the controller is further configured to:

[0034] When the airtight branch is connected to the pneumoperitoneum, the ventilation valve, the first pressure relief valve, and the smoke exhaust valve are kept closed when the pneumoperitoneum pressure is detected.

[0035] In one embodiment, the surgical gas supply system further includes a gas detection unit connected between the first pressure relief valve and the outlet of the pump, the gas detection unit being configured to detect the composition of the external gas flowing through it.

[0036] In one embodiment, the inflation passage includes multiple parallel pressure regulating branches, each of which includes a proportional pressure regulating valve and a direct-acting valve.

[0037] In one embodiment, the controller is further configured to: control the inflation passage to inflate the circulating air supply passage before starting the pump.

[0038] In one embodiment, when the airtight branch is connected to the pneumatic abdomen, the air pressure returning to the pneumatic abdomen from the airtight branch is greater than the air pressure returning to the pneumatic abdomen from the circulating air supply passage when the airtight branch is disconnected from the pneumatic abdomen.

[0039] In one embodiment, the surgical air supply system further includes a second flow valve connected in parallel with the pump, and the controller is configured to adjust the second flow valve so that the flow rate of the second flow valve is greater when the air-tight branch is connected to the pneumoperitoneum than when the air-tight branch is disconnected from the pneumoperitoneum.

[0040] Another object of the present invention is to provide a control method for an insufflator, the insufflator including an air circuit for connecting to the insufflator for air supply, the control method comprising:

[0041] Start the pneumoperitoneum machine to inflate, thereby increasing the pressure in the airway;

[0042] In response to the pressure in the air circuit reaching the preset pressure, inflation stops and the pump starts;

[0043] During the operation of the pump, when the passage between the pump's outlet and the air bladder is blocked, the vent valve connected to the pump's inlet is opened, and the first pressure relief valve connected to the pump's outlet is opened to detect the pressure of the air passage.

[0044] In response to the pressure in the gas path being lower than a preset pressure, the vent valve and the first pressure relief valve are closed, and the gas path is inflated.

[0045] As one embodiment, the control method of the pneumoperitoneum machine further includes:

[0046] In response to the pressure in the gas path being higher than the preset pressure, the first pressure relief valve is opened to release pressure.

[0047] As one embodiment, the control method of the pneumoperitoneum machine further includes:

[0048] Before the pressure in the air passage reaches the preset pressure for the first time, the passage between the pump outlet and the air belly is kept closed.

[0049] Once the pressure in the air passage reaches the preset pressure, the pump continues to operate.

[0050] In one embodiment, the step of closing the vent valve and the first pressure relief valve, and filling the gas path with gas includes:

[0051] Close the vent valve to allow external gas in the gas path to be discharged through the first pressure relief valve;

[0052] Once the external gas in the gas path is completely exhausted, close the first pressure relief valve and open the passage between the pump outlet and the gas abdomen.

[0053] In response to the pressure in the air circuit reaching the preset pressure, inflation stops.

[0054] As one implementation method, determining that the external gas in the gas path has been exhausted includes:

[0055] The gas detection unit configured between the first pressure relief valve and the outlet of the pump is determined to have a detection result less than a component threshold, and / or the vent valve is determined to be closed for a preset duration.

[0056] As one implementation method, detecting the pressure of the gas path includes:

[0057] Close the first air supply valve located in the passage between the pump's air outlet, the inflation passage, and the pneumatic abdomen;

[0058] The pressure downstream of the first air supply valve in the passage between the air outlet of the pump and the air belly is detected, and the measured pressure is taken as the pressure of the air passage.

[0059] Open the first air supply valve.

[0060] The surgical air supply system provided by this invention can achieve air circulation by continuously running a pump during the maintenance of pressure inside the pneumoperitoneum. The pneumoperitoneum machine can seamlessly and flexibly adjust its working state according to the changes in pressure inside the pneumoperitoneum, without causing pressure fluctuations inside the pneumoperitoneum caused by the instantaneous start and stop of the pump during the inflation process. Attached Figure Description

[0061] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1A This is a structural block diagram of a surgical air supply system according to an embodiment of the present invention;

[0063] Figure 1B This is a schematic diagram of a surgical air supply system according to an embodiment of the present invention;

[0064] Figures 2A-2B This is a schematic diagram of two different working states of a surgical gas supply system under conventional gas supply mode according to an embodiment of the present invention.

[0065] Figures 3A-3F This is a schematic diagram of six different working states of a surgical air supply system under the first air supply mode according to an embodiment of the present invention.

[0066] Figures 4A-4F This is a schematic diagram of six different working states of a surgical air supply system under the second air supply mode according to an embodiment of the present invention.

[0067] Figure 5 This is a schematic diagram of the working state of a surgical air supply system in self-test mode according to an embodiment of the present invention;

[0068] Figure 6 A schematic diagram of an inflation passage according to an embodiment of the present invention is shown;

[0069] Figure 7 A partial flowchart of the pneumoperitoneum machine control method according to an embodiment of the present invention is shown;

[0070] Figure 8 A partial flowchart of the pneumoperitoneum machine control method according to an embodiment of the present invention is shown;

[0071] Figure 9A , 9B It shows Figure 8 A partial flowchart of the control method in the diagram;

[0072] Figure 10 A partial flowchart of the control method for an insufflator according to an embodiment of the present invention is shown.

[0073] Figure 11 It shows Figure 10 A partial flowchart of the control method in the diagram;

[0074] Figure 12 A block diagram of the control system of an insufflator is shown. Detailed Implementation

[0075] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0076] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. The terms "distal" and "proximal" used herein are directional terms commonly used in the field of interventional medical devices, where "distal" refers to the end away from the operator during the procedure, and "proximal" refers to the end closer to the operator during the procedure.

[0077] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0080] The following will be described in detail with reference to the accompanying drawings.

[0081] See Figure 1A and Figure 1B This embodiment provides a surgical gas supply system, including a pump M, a controller 10, a valve group K, and a gas passage group L. The pump M can be connected to the gas passage group L to realize the circulation of surgical gas inside and outside the abdominal cavity. The gas passage group L includes several gas passages connecting to the abdominal cavity, such as L0, L1, ..., Lm. The valve group K includes several valves, such as K1, K2, ..., Kn, C1, C2, ..., Cx, etc., where m, n, and x are positive integers. The valves of the valve group K can be connected to each gas passage to change the on / off state between gas passages or the flow rate of gas. The controller 10 is communicatively connected to both the pump M and the valve group K, and is used to control the working status of the pump and each valve as needed.

[0082] In one embodiment, the gas passage group L includes a circulating gas supply passage L1 and a circulating gas return passage L2. The circulating gas supply passage L1 is configured to connect the outlet of the pump M to the gas sump 1, thereby supplying gas to the gas sump 1. A gas cooler 2 may also be provided between the outlet of the pump M and the gas sump 1 to absorb and recover excess heat from the gas. The circulating gas return passage L2 is configured to connect the inlet of the pump M to the gas sump 1, thereby recovering the returned gas from the gas sump 1. Once the gas sump 1 is established, during the operation of the pump M, the gas can circulate in a closed-loop gas path of "circulating gas supply passage L1—gas sump 1—circulating gas return passage L2—pump M—circulating gas supply passage L1", which is referred to as internal circulation in this application. For example, a first filter element A1 can be provided between the circulating air supply passage L1 and the pneumoperitoneum 1, and a second filter element A2 can also be provided between the circulating air return passage L2 and the pneumoperitoneum 1. The first filter element A1 and the second filter element A2 can also be integrated on the same filter cartridge. The circulating air supply passage L1 and the circulating air return passage L2 pass through the filter cartridge and are connected to the pneumoperitoneum 1 by a clip. For example, these two passages L1 and L2 can be connected to the pneumoperitoneum 1 by two clips with single lumens 11 / 12, or a clip with double lumens 11 and 12 can be used to connect to the pneumoperitoneum 1. The gas recovered from the pneumoperitoneum 1, which may contain impurities such as smoke generated during surgery, is purified after being filtered by the second filter element A2 and the first filter element A1. Therefore, the gas can be reused. For example, the gas introduced into the pneumoperitoneum 1 from the circulating gas supply passage L1 can be carbon dioxide, nitrogen, etc. The second filter element A2 and the first filter element A1 can be high-precision filter elements. For example, the filtration of smoke can be mainly completed by the first filter element A1. The first filter element A1 can include at least one of activated carbon and pleated filter elements. If the gas needs to pass through the filter element, a certain gas pressure needs to be applied. Therefore, to a certain extent, the second filter element A2 and the first filter element A1 can prevent low-pressure gas leakage.

[0083] In one embodiment, vent valve K1 is configured to connect to the inlet of pump M and selectively communicate with the outside, and first pressure relief valve K2 is configured to connect to the outlet of pump M and selectively communicate with the outside. Exemplarily, vent valve K1 is located on the recirculation return passage L2, in the passage between the outlet of pump M and the gas bladder 1. It is understood that in other embodiments, vent valve K1 may also be directly connected to an independent branch leading to the atmosphere, or vent valve K1 may be connected to an external gas source 20 for secondary utilization.

[0084] During the operation of pump M, when the passage between the outlet of pump M and the pneumoperitoneum 1 is blocked, controller 10 can open vent valve K1 and first pressure relief valve K2 to allow external gas to enter through vent valve K1, pass through pump M, and be discharged through first pressure relief valve K2, while detecting the pressure inside pneumoperitoneum 1. Thus, when the gas inside pneumoperitoneum 1 does not need to circulate, pump M continues to operate, allowing external gas (such as air, or a dedicated external gas source, such as the same gas as the body) to be drawn in through vent valve K1, pass through the recirculation return passage L2, pump M, and first pressure relief valve K2 in sequence, and then return to the outside. This achieves gas circulation outside the body without passing through pneumoperitoneum 1; in this application, this circulation is referred to as external circulation. In certain scenarios, such as when gas circulation within the pneumoperitoneum 1 is not required, the passage between the outlet of pump M and the pneumoperitoneum 1 can be closed, and external gas circulation can be achieved using the combination of venting valve K1 and the first pressure relief valve K2. When the detected pressure within the pneumoperitoneum 1 is lower than the preset pressure P0, the venting valve K1 and the first pressure relief valve K2 can be closed as needed to inflate the pneumoperitoneum 1. When the detected pressure within the pneumoperitoneum 1 is higher than the preset pressure P0, for example, during argon plasma coagulation surgery, the continuous supply of argon gas to the abdomen by the argon plasma coagulator can lead to abdominal overpressure. By opening the first pressure relief valve K2, the recovered gas can be directly released into the atmosphere to reduce the abdominal pressure until the pneumoperitoneum pressure returns to the preset pressure P0.

[0085] Pump M remains inactive until the pneumoperitoneum pressure reaches the preset pressure P0 after the system starts operating. Once the pneumoperitoneum is inflated and the pressure reaches the preset pressure P0, pump M continues to run, allowing for internal or external circulation as needed. Because pump M is always running, there are no sudden changes in the pneumoperitoneum pressure during the switching between internal and external circulation, avoiding the sudden suction force on the pneumoperitoneum caused by suddenly starting the pump. This helps to maintain a relatively constant pressure within the pneumoperitoneum, ensuring surgical safety.

[0086] To facilitate the control of the gas flow between pump M and the circulating gas supply passage L1, and to switch between internal and external gas circulation as needed, a smoke exhaust valve K3 can be connected between the circulating gas supply passage L1 and the outlet of pump M. When the smoke exhaust valve K3 is open, the gas recovered from the circulating return gas passage L2 can be supplied to the gas chamber 1 through the circulating gas supply passage L1 after passing through pump M. Conversely, the gas recovered from the circulating return gas passage L2 cannot be discharged after passing through pump M, and it is necessary to open the ventilation valve K1 and the first pressure relief valve K2 to achieve external circulation.

[0087] Here, the smoke exhaust valve K3 and the first pressure relief valve K2 are respectively connected to different branches leading out from the air outlet of the pump M. In other embodiments, the smoke exhaust valve K3 and the first pressure relief valve K2 can also be on the same branch, with the first pressure relief valve K2 located upstream of the smoke exhaust valve K3.

[0088] For example, the surgical air supply system may further include an airtight branch L3 connected to the air outlet of pump M. The airtight branch L3 is selectively connected to the pneumoperitoneum 1, and a first pressure relief valve K2 may be located on the airtight branch L3. The air passage between the airtight branch L3 and the pneumoperitoneum 1 can be controlled by a first circuit valve C1 located downstream of the airtight branch L3. The first pressure relief valve K2 is located between the air outlet of pump M and the first circuit valve C1. The first circuit valve C1 can be a manually controlled mechanical valve or an electrically controlled pressure regulating valve, such as a solenoid valve, that can be automatically controlled by the controller 10. Figures 3A-3F As shown, in the first gas supply mode, the first circuit valve C1 remains closed. The first circuit valve C1 can be located on the gas-tight branch L3, or on the inlet line of the filter cartridge or the puncture clamp.

[0089] Additionally, the opening and closing of the gas path between the recirculation return passage L2 and the pneumatic sump 1 can also be achieved through the second loop valve C2 located downstream of the recirculation return passage L2. Besides the second filter element A2 and the first filter element A1, a third filter element A3 can be installed between the first loop valve C1 and the pneumatic sump 1 to filter impurities in the high-pressure gas flowing into the pneumatic sump 1. The filtration accuracy of the third filter element A3 can be lower than that of the second filter element A2 and the first filter element A1.

[0090] In one embodiment, the surgical gas supply system further includes an inflation passage L4 connected to an external gas source 20. The inflation passage L4 can selectively connect to a circulating gas supply passage L1 or directly and selectively connect to the pneumoperitoneum 1, thereby supplying gas to the gas path under the control of the controller 10. For example, a first flow valve K4 is provided on the inflation passage L4. The controller 10 can adjust the flow rate of the first flow valve K4 to control the flow rate or on / off state of the gas supplied by the inflation passage L4. And / or, a first gas supply valve G1 can be provided upstream of the circulating gas supply passage L1 to control whether gas can pass through the circulating gas supply passage L1.

[0091] After the system is powered on, inflation is required. This can be done through inflation passage L4 to inflate the pneumoperitoneum 1 until the pressure reaches the preset pressure P0. At this point, inflation can be stopped, and pump M can be started to allow the gas to circulate internally between pump M and pneumoperitoneum 1. If the pneumoperitoneum pressure is detected to be lower than the preset pressure P0, inflation passage L4 can be used to inflate pneumoperitoneum 1 again. It is understood that the preset pressure P0 can be a preset pressure value or a preset pressure range.

[0092] In one implementation, the pneumoperitoneum pressure is obtained by measuring the static pneumatic pressure, i.e., by detecting the pressure in the non-circulating pneumatic path. For example... Figure 1B As shown, a first pressure sensor P1 is installed on the circulating air supply passage L1. The first pressure sensor P1 is located at one end near the pneumoperitoneum 1 and downstream of the first air supply valve G1. The pneumoperitoneum pressure is obtained by acquiring the static air pressure detection result of the first pressure sensor P1.

[0093] like Figures 3A-3F As shown, the diagram illustrates the gas path status after the system starts operating in the first gas supply mode, including inflation, pressure measurement, circulation, re-pressure measurement, inflation, and re-pressure measurement. During this process, the first loop valve C1 remains closed. The first gas supply mode can also be called the smoke extraction mode, primarily used for smoke extraction during surgery. For ease of understanding, in each diagram, filled valves represent the closed state, and unfilled valves represent the open state.

[0094] like Figure 3A During the inflation process, the first flow valve K4 and the first air supply valve G1 are open, while the exhaust valve K3, the ventilation valve K1, and the first pressure relief valve K2 are closed. Gas enters the gas abdomen 1 through the inflation passage L4 and the circulating air supply passage L1, filling the corresponding air passages. For example... Figure 3B In this process, after inflation for a period of time, the first air supply valve G1 is closed. When the inflatable sac pressure measured by the first pressure sensor P1 reaches the preset pressure P0, the first flow valve K4 can be closed to stop inflation; otherwise, inflation continues, and the above process of measuring the inflatable sac pressure is repeated intermittently. When the inflatable sac pressure measured by the first pressure sensor P1 exceeds the preset pressure P0, the first pressure relief valve K2 can be opened to reduce the air pressure until the measurement result of the first pressure sensor P1 meets the requirements. Figure 3C In this process, when the pressure of the pneumoperitoneum measured by the first pressure sensor P1 reaches the preset pressure P0, the internal circulation can be activated. Gas enters the pneumoperitoneum 1 from the circulation supply passage L1, circulates within the pneumoperitoneum 1, and is then recovered from the return passage L2. It is then pumped back to the circulation supply passage L1 by pump M, thus recovering and filtering the smoke gas within the pneumoperitoneum 1 for reuse. At this time, the first flow valve K4 needs to be closed, and the first supply valve G1 and the exhaust valve K3 need to be opened. Figure 3DDuring the process, after circulating for a period of time, the pneumoperitoneum pressure needs to be measured intermittently to determine whether inflation or depressurization is necessary. Before measuring the pressure, the air circuit must be switched to external circulation, i.e., the exhaust valve K3 and the first air supply valve G1 must be closed. The pressure value measured by the first pressure sensor P1 is the pneumoperitoneum pressure. When the pneumoperitoneum pressure is lower than the preset pressure P0, inflation is required; when the pneumoperitoneum pressure is higher than the preset pressure P0, the first pressure relief valve K2 needs to be opened to depressurize. Figure 3E In the process of circulation and pressure measurement, if the pneumoperitoneum pressure is found to be low and inflation is required, pump M is kept running continuously, and the exhaust valve K3 is kept closed. The first flow valve K4 and the first air supply valve G1 are opened, and gas is supplied to the pneumoperitoneum 1 through the inflation passage L4 and the circulation air supply passage L1. Figure 3F During inflation, pressure needs to be measured again. In this process, the air circuit needs to be switched to external circulation before pressure measurement, that is, keep the exhaust valve K3 closed and close the first air supply valve G1. The pressure value measured by the first pressure sensor P1 is the inflatable pressure. When the inflatable pressure is lower than the preset pressure P0, inflation needs to continue until the measurement result of the first pressure sensor P1 meets the requirements.

[0095] In one embodiment, the surgical gas supply system further includes a gas detection unit S1 connected between the first pressure relief valve K2 and the outlet of the pump M. The gas detection unit S1 is configured to detect the composition of the flowing gas. For example, the gas detection unit S1 can be an oxygen sensor that detects oxygen content. For example, the gas detection unit S1 can be located on the gas-tight branch L3, on a different branch than the smoke exhaust valve K3. In this way, before the smoke exhaust valve K3 is opened, the gas transmitted from the outlet of the pump M to the smoke exhaust valve K3 first fills the branch where the gas detection unit S1 is located, and the detection result of the gas detection unit S1 can better reflect the gas composition in the gas path.

[0096] When the passage between the outlet of pump M and the inflatable bladder 1 is cut off, during the operation of pump M, the steps by which controller 10 controls the inflation passage L4 to inflate the circulating air supply passage L1 include:

[0097] After the external circulation is activated and the pneumoperitoneum pressure is detected, when inflation is required, first close the ventilation valve K1. The pump M will no longer draw in air, but will instead draw in the gas supplied by the inflation passage L4. The recovered gas containing smoke in the pneumoperitoneum 1 will be discharged from the first pressure relief valve K2. When the detection result of the gas detection unit S1 is less than the component threshold, it indicates that the air in the gas path has been completely purged. Then, the first pressure relief valve K2 can be closed and the smoke exhaust valve K3 can be opened to start the internal circulation. When the pneumoperitoneum pressure reaches the preset pressure P0, inflation will stop.

[0098] In other embodiments, it is not necessary to rely on the gas detection unit S1 to detect whether the air in the gas path has been completely purged. When inflation is required, the vent valve K1 is closed first, so that the pump M discharges the gas from its inlet through the first pressure relief valve K2. After a preset time t, the air has been completely purged, and the first pressure relief valve K2 is closed and the smoke exhaust valve K3 is opened. When the gas bladder pressure reaches the preset pressure P0, inflation is stopped.

[0099] In one embodiment, the surgical gas supply system may further include a second flow valve K5, configured to be connected in parallel with pump M to regulate the outlet flow rate of pump M. Exemplarily, the inlet of the second flow valve K5 is connected to the outlet of pump M, and the outlet of the second flow valve K5 is connected to the inlet of pump M. The second flow valve K5 may have multiple settings; when the flow rate through the second flow valve K5 increases, the outlet flow rate of pump M decreases, and vice versa. Thus, the flow rate of the returning smoke and the gas flow rate through the ventilation valve K1 and the first pressure relief valve K2 can be adjusted by regulating the flow rate of the second flow valve K5. For example, when a large amount of smoke is generated inside the pneumoperitoneum 1, the flow rate of the second flow valve K5 can be reduced to accelerate smoke extraction.

[0100] like Figures 4A-4F The diagram illustrates the gas path status during inflation, pressure measurement, circulation, re-pressure measurement, inflation, and re-pressure measurement after the system starts operating in the second gas supply mode. Throughout this process, the first loop valve C1 remains open. The second gas supply mode, also known as the gas-sealed mode, is primarily used to provide a gas seal at the pneumoperitoneum opening during surgery. The gas supply pressure in the second mode is greater than that in the first mode; that is, the outlet pressure of the gas-sealed branch L3 is greater than the outlet pressure of the circulating gas supply path L1. This gas-sealed opening provides a channel for the insertion and removal of surgical instruments without the need for mechanical seals, thus avoiding interference from mechanical seals. These two pathways, L2 and L3, can be connected to the pneumoperitoneum 1 using two single-lumen tampers 12 / 13, or a single tamper with two lumens 12 and 13. Alternatively, all three pathways, L1, L2, and L3, can be connected to the pneumoperitoneum 1 using the same tamper with three lumens 11, 12, and 13.

[0101] like Figure 4A Similar to the first mode, in the second gas supply mode, during the start-up and inflation process, the first flow valve K4 and the first gas supply valve G1 are open, while the exhaust valve K3, the ventilation valve K1, and the first pressure relief valve K2 are closed. Gas enters the gas abdomen 1 through the inflation passage L4 and the circulating gas supply passage L1 and fills the corresponding gas passages. For example... Figure 4BIn this process, after inflation for a period of time, the first air supply valve G1 is closed. When the inflatable sac pressure measured by the first pressure sensor P1 reaches the preset pressure P0, the first flow valve K4 can be closed to stop inflation; otherwise, inflation continues, and the above process of measuring the inflatable sac pressure is repeated intermittently. When the inflatable sac pressure measured by the first pressure sensor P1 exceeds the preset pressure P0, the first pressure relief valve K2 can be opened to reduce the air pressure until the measurement result of the first pressure sensor P1 meets the requirements. Figure 4C In this process, when the pressure of the pneumoperitoneum measured by the first pressure sensor P1 reaches the preset pressure P0, the gas seal can be opened. High-pressure gas enters the pneumoperitoneum 1 from the gas seal branch L3, circulates within the pneumoperitoneum 1, is recovered from the recirculation return passage L2, and is then pumped back to the gas seal branch L3 by pump M. At this time, the first flow valve K4, the first gas supply valve G1, and the smoke exhaust valve K3 need to be closed. Figure 4D During the process, after a period of circulation, the pneumoperitoneum pressure needs to be measured intermittently to determine whether inflation or depressurization is necessary. During this process, there is no need to change the opening or closing status of the valves; simply reading the pressure value measured by the first pressure sensor P1 is the pneumoperitoneum pressure. When the pneumoperitoneum pressure is lower than the preset pressure P0, inflation is required; when the pneumoperitoneum pressure is higher than the preset pressure P0, the first pressure relief valve K2 needs to be opened to depressurize. Figure 4E In the process of circulation and pressure measurement, if the pneumoperitoneum pressure is found to be low and inflation is required, pump M is kept running continuously, and the exhaust valve K3 is kept closed. The first flow valve K4 and the first air supply valve G1 are opened, and gas is supplied to the pneumoperitoneum 1 through the inflation passage L4 and the circulation air supply passage L1. Figure 4F After inflation, the pressure needs to be measured again. During the pressure measurement process, the first air supply valve G1 needs to be closed. The pressure value measured by the first pressure sensor P1 is the static air pressure, which is the pneumoperitoneum pressure. When the pneumoperitoneum pressure is lower than the preset pressure P0, inflation needs to continue until the measurement result of the first pressure sensor P1 meets the requirements.

[0102] As can be seen, unlike the first gas supply mode, in the second gas supply mode, the exhaust valve K3 and the vent valve K1 remain closed at all times, and the first pressure relief valve K2 only opens in special circumstances requiring pressure relief, remaining closed otherwise. During pressure measurement in the second gas supply mode, the gas path maintains internal circulation. Regardless of whether it is the first or second gas supply mode, pump M and exhaust valve K3 remain closed from the start of system operation until the gas bladder pressure reaches the preset pressure P0; after the gas bladder pressure reaches the preset pressure P0, pump M continues to operate.

[0103] In other embodiments, the two gas supply modes described above can be combined, with gas source 20 supplying gas to the sealed branch L3 separately, and the return gas from the sealed branch L3 and the return gas from the circulating gas supply passage L1 sharing the circulating return gas passage L2 for recycling.

[0104] In addition, in this embodiment, the gas passage group L may also include a conventional gas supply passage L0, which is connected to an external gas source 20, for example, through an inflation passage L4. The downstream end of the conventional gas supply passage L0 is connected to the pneumoperitoneum 1 via a tamper with a single lumen 14. The surgical gas supply system may also include a conventional gas supply mode, such as... Figures 2A-2B The diagram illustrates the gas path status during inflation and pressure measurement after the system starts operating in normal gas supply mode. For example, the normal gas supply path L0 includes a second gas supply valve G2 connected upstream and a second pressure sensor P2 downstream of the second gas supply valve G2. The inflation path L4 also includes a second pressure relief valve K6. Figure 2A During the inflation process, only the first flow valve K4 and the second air supply valve G2 are open, while the first air supply valve G1 and other valves are closed. The pneumoperitoneum 1 can be inflated through the conventional air supply passage L0. For example... Figure 2B After inflation for a period of time, the second air supply valve G2 is closed. When the inflatable pressure measured by the second pressure sensor P2 reaches the preset pressure P0, the first flow valve K4 can be closed to stop inflation. Otherwise, inflation continues, and the above process of measuring the inflatable pressure is repeated intermittently. When the inflatable pressure measured by the second pressure sensor P2 exceeds the preset pressure P0, the second pressure relief valve K6 can be opened to reduce the air pressure until the measurement result of the second pressure sensor P2 meets the requirements.

[0105] For example, at least one pressure sensor can be installed on each gas passage to detect dynamic or static gas pressure conditions in the gas passage. For instance, such as... Figures 2A-2B In the process, a second pressure sensor P2 is installed on the conventional gas supply passage L0; a third pressure sensor P3, a fourth pressure sensor P4, and a fifth pressure sensor P5 are installed on the inflation passage L4. The third pressure sensor P3 is located at the connection between the inflation passage L4 and the conventional gas supply passage L0, the fourth pressure sensor P4 is located at the connection between the inflation passage L4 and the circulating gas supply passage L1, and the fifth pressure sensor P5 is located upstream of the first flow valve K4; a sixth pressure sensor P6 is installed on the circulating return gas passage L2, a seventh pressure sensor P7 is installed on the sealed branch L3, and an eighth pressure sensor P8 is also connected to the end of the inflation passage L4 near the gas source 20.

[0106] For example, the inflation passage L4 starts upstream of the gas line and sequentially includes an eighth pressure sensor P8, a pressure reducing valve K7, a heater 3, a first flow valve K4, and a second pressure relief valve K6. The amount of remaining gas in the gas source 20 can be determined by the pressure value measured by the eighth pressure sensor P8. High-pressure gas, such as carbon dioxide, entering from the gas source 20 is depressurized by the pressure reducing valve K7, and the pressure after depressurization is measured by the fifth pressure sensor P5. Then, the gas flow is controlled by the first flow valve K4 to reduce the pressure again. The overpressured gas in the gas bladder 1 can be released through the second pressure relief valve K6. The inflation passage L4 can also be connected to a branch leading out from the outlet of the pump M through a gas filling valve K8. The inlet end of the gas filling valve K8 can be connected between the pressure reducing valve K7 and the first flow valve K4 to provide medium-pressure gas after initial depressurization following heating. When it is necessary to increase the filling speed of the gas in the gas line, the gas filling valve K8 can be opened to fill with medium-pressure gas. The medium-pressure gas filling through the gas filling valve K8 can increase the gas line pressure to overcome the resistance of passing through the filter element.

[0107] In addition, the surgical gas supply system may also include a self-test mode, such as... Figure 5 In self-test mode, the valves leading to the pneumoperitoneum 1, the valves connecting to the outside, and some valves between passages can be closed first, such as the second pressure relief valve K6, the vent valve K1, the first pressure relief valve K2, the first air supply valve G1, the second air supply valve G2, the first circuit valve C1, the second circuit valve C2, and the smoke exhaust valve K3. After these valves are closed, gas is introduced from the gas source 20 into the inflation passage L4. By detecting the measured values ​​of each pressure sensor, it can be determined whether each pipeline is blocked. By opening and closing each valve one by one or in batches, the airtightness of each valve can be tested.

[0108] like Figure 6 The gas filling passage L4 can also include a pressure regulating unit 4, located downstream of the heater 3 and upstream of the first flow valve K4. This unit includes a proportional pressure regulating valve 41. Gas, after being pressure-reduced by the pressure reducing valve K7, enters the pressure regulating unit 4 for controlled pressure regulation, and then flows again through the first flow valve K4 to achieve precise supply. Exemplarily, the pressure regulating unit 4 includes multiple parallel pressure regulating branches 40, each including a proportional pressure regulating valve 41 and a direct-acting valve 42. Multiple proportional pressure regulating valves 41 are connected in parallel, and each pressure regulating branch 40 is controlled by a direct-acting valve 42. Therefore, by controlling the on / off state of the direct-acting valve 42, the number of pressure regulating branches 40 participating in pressure regulation can be increased or decreased. Higher precision pressure regulation can be achieved by controlling the proportional pressure regulating valves 41, while also taking into account the large flow characteristics of the gas path.

[0109] Combination Figure 7 As shown, in one embodiment, the control method for the pneumoperitoneum machine provided in this embodiment, in the first air supply mode, includes:

[0110] Turn on the machine and inflate it to increase the air pressure (e.g., Figure 3A );

[0111] In response to the gas pressure reaching the preset pressure P0, inflation stops and pump M is started to allow gas to circulate between pump M and the inflatable bladder (e.g., Figure 3C Otherwise, continue inflating;

[0112] During the operation of pump M, when the passage between the outlet of pump M and the gas chamber 1 is blocked, the vent valve K1 connecting the inlet of pump M and the first pressure relief valve K2 at the outlet are opened to allow for external gas circulation, and the gas pressure at the first pressure sensor P1 is detected (e.g., Figure 3D );

[0113] In response to the gas circuit pressure being lower than the preset pressure P0, the vent valve K1 and the first pressure relief valve K2 are closed, and the gas circuit is filled with gas (e.g., Figure 3E ).

[0114] Combination Figure 8 As shown, in one embodiment, the control method of the pneumoperitoneum machine may include:

[0115] Turn on the machine and inflate it to increase the air pressure (e.g., Figure 3A , 4A );

[0116] In response to the gas pressure reaching the preset pressure P0, inflation stops and pump M is started to circulate the gas between pump M and the inflatable bladder 1;

[0117] Specifically, when the airtight branch L3 is connected to the pneumatic ventilator:

[0118] Open the exhaust valve K3 connecting the recirculating gas supply passage L1 and the airtight branch L3, so that the gas recovered from the recirculating return gas passage L2 is pumped through pump M and then supplied from the recirculating gas supply passage L1 (e.g. Figure 3C );as well as,

[0119] Intermittently monitor the air pressure in the circulating air supply path L1 (e.g.) Figure 3D When detecting the gas pressure, close the exhaust valve K3 and open the air inlet valve K1 and the first pressure relief valve K2 of the outlet of the pump M. After closing the first air supply valve G1 on the circulating air supply passage L1, measure the pressure downstream of the first air supply valve G1 on the circulating air supply passage L1, which is the gas pressure.

[0120] For example, the pump M and the exhaust valve K3 are kept closed from the start of operation of the pneumoperitoneum machine until the air pressure reaches the preset pressure P0; after the air pressure reaches the preset pressure P0, the pump M is kept running.

[0121] like Figure 9A In the process of controlling the pneumoperitoneum machine, when pump M starts and the air-tight branch L3 is connected to the pneumoperitoneum, in response to the measured air pressure being lower than the preset pressure P0, the ventilation valve K1 and the first pressure relief valve K2 are kept closed, the smoke exhaust valve K3 is opened, and the circulating air supply passage L1 is inflated; in one embodiment, this process specifically includes: inflating the circulating air supply passage L1; keeping the smoke exhaust valve K3 closed and closing the ventilation valve K1, so that the air in the air passage is discharged from the first pressure relief valve K2; in response to the air in the air passage being completely discharged, closing the first pressure relief valve K2 and opening the smoke exhaust valve K3; in response to the air pressure reaching the preset pressure P0, inflating is stopped and circulation continues.

[0122] To determine whether the air in the gas path has been completely purged, it can be done in the following two ways: by determining whether the detection result of the gas detection unit S1 connected between the first pressure relief valve K2 and the outlet of the pump M is less than the component threshold, or by determining whether a preset time t has elapsed after the vent valve K1 has been closed.

[0123] like Figure 9B During the control of the pneumoperitoneum machine, when pump M starts and the air-tight branch L3 is disconnected from the pneumoperitoneum, keep the ventilation valve K1, the first pressure relief valve K2, and the smoke exhaust valve K3 closed, so that the gas recovered from the circulating return air passage L2 passes through pump M and is output from the air-tight branch L3 to supply gas; then, the gas circuit pressure is intermittently detected. When detecting the gas circuit pressure, the ventilation valve K1, the first pressure relief valve K2, and the smoke exhaust valve K3 need to be kept closed.

[0124] For example, after pump M starts and the air-tight branch L3 is disconnected from the pneumoperitoneum, the process of controlling the pneumoperitoneum machine further includes:

[0125] In response to the measured air pressure being lower than the preset pressure P0, the exhaust valve K3, the ventilation valve K1, and the first pressure relief valve K2 remain closed;

[0126] Inflate the circulating air supply passage L1;

[0127] In response to the air pressure reaching the preset pressure P0, inflation stops.

[0128] The aforementioned air pressure can be the pressure value measured by the first pressure sensor P1 when the first air supply valve G1 is closed.

[0129] Combination Figure 10 and Figure 11 In one embodiment, the control method of the pneumoperitoneum machine of this embodiment may include:

[0130] Start pump M to maintain air circulation (e.g., Figure 3A , 4A );

[0131] Obtain the opening and closing status of the first loop valve C1 downstream of the gas-tight branch L3, and switch the gas circuit circulation mode according to the opening and closing status of the first loop valve C1, wherein:

[0132] With the airtight branch L3 connected to the gas bladder, the exhaust valve K3 connected between the circulating gas supply passage L1 and the airtight branch L3 remains open, so that the gas recovered from the circulating return gas passage L2 is pumped through pump M and then output from the circulating gas supply passage L1 to supply gas.

[0133] With the gas-tight branch L3 disconnected from the gas bladder, the exhaust valve K3 remains closed, allowing the gas recovered from the circulating return gas passage L2 to be pumped through the pump M and then output from the gas-tight branch L3 for gas supply. The gas supply pressure at the outlet of the gas-tight branch L3 is greater than the gas supply pressure at the outlet of the circulating gas supply passage L1.

[0134] For example, combined Figure 11 , 4A ~4F, with the airtight branch L3 disconnected from the pneumatic ventilator, after closing the exhaust valve K3, the recirculating air supply passage L1 can be inflated (e.g., Figure 4A Subsequently, the inflation is paused, the first air supply valve G1 on the circulating air supply passage L1 is closed, and the air pressure downstream of the first air supply valve G1 on the circulating air supply passage L1 is detected (e.g., Figure 4B ); In response to the air circuit pressure reaching the preset pressure P0, the inflation stops and the pump M is started for circulation (e.g. Figure 4C If the gas pressure does not reach the preset pressure P0, the first gas supply valve G1 is opened, and the above-mentioned inflation and detection process continues until the gas pressure reaches the preset pressure P0.

[0135] For example, when the gas-tight branch L3 is disconnected from the gas-suppressed state, the process of starting pump M to circulate gas and supplying gas by outputting gas from the gas-tight branch L3 includes:

[0136] Intermittently monitor the airway pressure (e.g.) Figure 4D When detecting the air pressure, keep the exhaust valve K3 closed, and keep the air inlet valve K1 and the first pressure relief valve K2 of the outlet connected to the pump M closed.

[0137] In response to the air pressure being lower than the preset pressure P0, the circulating air supply passage L1 is inflated (e.g., Figure 4E );

[0138] After inflation, the pressure needs to be measured again (e.g. Figure 4FDuring the pressure measurement process, the first air supply valve G1 needs to be closed. The pressure value measured by the first pressure sensor P1 is the pneumoperitoneum pressure. When the pneumoperitoneum pressure is lower than the preset pressure P0, inflation needs to continue until the measurement result of the first pressure sensor P1 meets the requirements. When the air pressure reaches the preset pressure P0, inflation stops.

[0139] For example, by adjusting the second flow valve K5 connected in parallel with the pump M, the flow rate of the second flow valve K5 when the air-tight branch L3 is connected to the air-suppressed section is greater than the flow rate when the air-tight branch L3 is disconnected from the air-suppressed section.

[0140] Another object of the present invention is to provide a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor and executing the steps of the above-described control method for an insufflator.

[0141] Furthermore, this embodiment also provides a computer-readable storage medium storing multiple instructions adapted for loading and execution by at least one processor of the steps of the aforementioned control method for an insufflator. This computer-readable storage medium is part of the control system of the insufflator. In some embodiments, the processor may be a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of a computing device. In this embodiment, the processor is used to run program code stored in the storage medium or to process data.

[0142] like Figure 12 This embodiment also provides a control system for an insufflator, which includes a memory 1 and a processor 2. The memory 1 may be the aforementioned computer-readable storage medium, which stores multiple instructions adapted to be loaded by at least one processor 2 and executed by the steps of the aforementioned control method for the insufflator.

[0143] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0144] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0145] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A surgical air supply system, characterized in that, include: Recirculating gas supply path (L1); Circulation return passage (L2); The downstream of the airtight branch (L3) can be selectively connected to or disconnected from the pneumatic ventilator; The pump (M) has its air inlet connected to the circulating return air passage (L2) and its air outlet connected to the circulating air supply passage (L1) and the airtight branch (L3). The smoke exhaust valve (K3) is connected between the circulating air supply passage (L1) and the airtight branch (L3); A vent valve (K1) connecting the inlet of the pump (M) and a first pressure relief valve (K2) connecting the outlet of the pump (M); The controller is configured as follows: Start the pump (M); With the airtight branch (L3) disconnected from the pneumoperitoneum, the exhaust valve (K3) is opened, allowing the pneumoperitoneum gas recovered from the recirculation return passage (L2) to flow back to the pneumoperitoneum via the pump (M) and the recirculation supply passage (L1). With the airtight branch (L3) connected to the pneumoperitoneum, the exhaust valve (K3) is closed, so that the pneumoperitoneum gas recovered from the recirculation return passage (L2) flows back to the pneumoperitoneum through the pump (M) via the airtight branch (L3). The circulation of gas between the circulating gas supply passage (L1), the pneumoperitoneum, the circulating gas return passage (L2), and the pump (M) is called internal circulation; When the passage between the outlet of the pump (M) and the air belly is blocked, the vent valve (K1) and the first pressure relief valve (K2) are opened, allowing outside gas to enter through the vent valve (K1), pass through the pump (M), and be discharged through the first pressure relief valve (K2), forming an external circulation; The pump (M) is in operation while the gas is switching between the internal and external circulation.

2. The surgical air supply system according to claim 1, characterized in that, It also includes a first air supply valve (G1), which is located on the circulating air supply passage (L1); The controller is configured to: Close the first gas supply valve (G1); The pressure downstream of the first air supply valve (G1) on the circulating air supply passage (L1) is detected as the pneumoperitoneum pressure; Open the first gas supply valve (G1).

3. The surgical air supply system according to claim 1, characterized in that, It also includes an inflation passage (L4) that can be selectively connected to the circulating gas supply passage (L1), the inflation passage (L4) being supplied with gas by a gas source (20); The controller is also configured to: Measure the pressure in pneumoperitoneum; In response to the pneumoperitoneum pressure being lower than the preset pressure (P0), the inflation passage (L4) is controlled to inflate the circulating air supply passage (L1); In response to the pneumoperitoneum pressure reaching the preset pressure (P0), inflation stops.

4. The surgical air supply system according to claim 3, characterized in that, The controller is also configured to operate when the gas-tight branch (L3) is disconnected from the pneumoperitoneum: Before detecting the pneumoperitoneum pressure, close the exhaust valve (K3) and open the ventilation valve (K1) and the first pressure relief valve (K2). During the process of controlling the inflation passage (L4) to inflate the circulating air supply passage (L1): Keep the exhaust valve (K3) closed to fill the circulating air supply passage (L1) with air; Close the vent valve (K1) to allow the outside gas collected from the air inlet of the pump (M) to be discharged through the first pressure relief valve (K2); Once it is confirmed that the outside gas collected from the air inlet of the pump (M) has been exhausted, the first pressure relief valve (K2) is closed and the smoke exhaust valve (K3) is opened.

5. The surgical air supply system according to claim 4, characterized in that, The controller is also configured to: When the airtight branch (L3) is connected to the pneumoperitoneum, the ventilation valve (K1), the first pressure relief valve (K2), and the smoke exhaust valve (K3) are kept closed when the pneumoperitoneum pressure is detected.

6. The surgical air supply system according to claim 4, characterized in that, It also includes a gas detection unit (S1) connected between the first pressure relief valve (K2) and the outlet of the pump (M), the gas detection unit (S1) being configured to detect the composition of the external gas flowing through it.

7. The surgical air supply system according to claim 3, characterized in that, The inflation passage (L4) includes multiple parallel pressure regulating branches (40), each of which includes a proportional pressure regulating valve (41) and a direct-acting valve (42).

8. The surgical air supply system according to claim 3, characterized in that, The controller is also configured to: control the inflation passage (L4) to inflate the circulating air supply passage (L1) before starting the pump (M).

9. The surgical air supply system according to claim 8, characterized in that, The controller is also configured to: In response to the pressure in the circulating air supply passage (L1) being higher than the preset pressure (P0), the first pressure relief valve (K2) is opened to release pressure.

10. The surgical air supply system according to claim 8, characterized in that, The controller is also configured to: Before the pressure in the circulating air supply passage (L1) reaches the preset pressure (P0) for the first time, the passage between the air outlet of the pump (M) and the air belly is kept closed. After the pressure in the circulating air supply passage (L1) reaches the preset pressure (P0), the pump (M) is kept running.

11. The surgical air supply system according to claim 8, characterized in that, The controller is also configured to: Close the vent valve (K1) to allow the outside gas in the circulating air supply passage (L1) to be discharged from the first pressure relief valve (K2); Once the external gas in the circulating air supply passage (L1) is exhausted, close the first pressure relief valve (K2) and open the passage between the air outlet of the pump (M) and the air belly. In response to the pressure in the circulating air supply passage (L1) reaching the preset pressure (P0), inflation is stopped.

12. The surgical air supply system according to claim 11, characterized in that, The controller is also configured to: The gas detection unit (S1) configured between the first pressure relief valve (K2) and the outlet of the pump (M) is determined to have a detection result less than the component threshold, and / or the vent valve (K1) is determined to be closed for a preset duration (t).

13. The surgical air supply system according to claim 1, characterized in that, When the airtight branch (L3) is connected to the pneumoperitoneum, the air pressure returning to the pneumoperitoneum via the airtight branch (L3) is greater than the air pressure returning to the pneumoperitoneum via the circulating air supply passage (L1) when the airtight branch (L3) is disconnected from the pneumoperitoneum.

14. The surgical air supply system according to claim 13, characterized in that, It also includes a second flow valve (K5) connected in parallel with the pump (M), and the controller is configured to adjust the second flow valve (K5) so that the flow rate of the second flow valve (K5) in the state where the air-tight branch (L3) is connected to the pneumatic system is greater than the flow rate in the state where the air-tight branch (L3) is disconnected from the pneumatic system.

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