Endoscope suction device

Abstract

The present application relates to the field of medical devices, and specifically provides a kind of endoscope aspirator, the endoscope aspirator includes: shell;First flow acquisition component and second flow acquisition component are arranged in the shell;Fixedly connected to the suction tube in the shell;Switching valve is arranged in the shell;Clutch assembly is arranged in the shell, the clutch assembly is connected with the first flow acquisition component and the second flow acquisition component;Pipe network is arranged in the shell, the pipe network is communicated with first flow acquisition component, second flow acquisition component, switching valve and suction tube by pipeline;Endoscope aspirator disclosed in the present application when aspirating peritoneal fluid makes peritoneal fluid separate into two parts, one part is the same as the volume of washing liquid for flushing, and the other part is the amount of blood, so that the amount of bleeding calculation is more accurate.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an endoscopic suction device. Background Technology

[0002] Minimally invasive surgery, represented by laparoscopic techniques, has become an important direction in medical development, and most abdominal organ surgeries can now be performed laparoscopically. During the procedure, due to the cutting and separation of tissues, fat liquefaction and damage to small blood vessels occur, inevitably requiring the use of suction devices to remove the resulting blood and fluid.

[0003] Current laparoscopic aspirators have both irrigation and aspiration functions, but these functions share a single aspiration tube. When irrigation is followed by aspiration, the irrigation fluid and blood mix, and both are drawn out simultaneously during aspiration, making it difficult to accurately measure the amount of bleeding. Therefore, this application proposes a new laparoscopic aspirator. Summary of the Invention

[0004] The purpose of this invention is to provide a laparoscopic aspirator to solve the problem that it is difficult to calculate the amount of postoperative bleeding after rinsing the abdominal cavity with current laparoscopic aspirators.

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

[0006] An endoscopic suction device, the endoscopic suction device comprising:

[0007] shell;

[0008] The first flow acquisition component and the second flow acquisition component, which are disposed inside the housing, are used to acquire the flow rate of the injected cleaning fluid and the aspiration volume of peritoneal fluid, respectively.

[0009] A suction tube is fixedly connected inside the housing, with the end of the suction tube away from the housing extending into the abdominal cavity to perform cleaning and suction operations;

[0010] The switching valve located inside the housing switches the pipeline after drawing in peritoneal fluid of the same volume as the cleaning fluid, so that the peritoneal fluid is separated into two parts, one of which has the same volume as the cleaning fluid.

[0011] A clutch assembly is provided inside the housing. The clutch assembly is connected to the first flow acquisition assembly and the second flow acquisition assembly. The clutch assembly is activated when the cleaning fluid is introduced, and controls the switching valve to switch the outlet of the peritoneal fluid after the aspirated peritoneal fluid reaches the same volume as the flushing cleaning fluid.

[0012] The pipeline network located inside the housing is connected to the first flow acquisition component, the second flow acquisition component, the switching valve, and the suction tube via pipelines. During flushing, the pipeline network directs the flushing fluid flowing out of the first flow acquisition component into the suction tube, and during the suction of peritoneal fluid, it directs the peritoneal fluid through the second flow acquisition component into the switching valve.

[0013] Furthermore, the first flow acquisition component includes a hollow first cylinder and a first turbine rotatably connected to the first cylinder, and the second flow acquisition component includes a second cylinder and a second turbine, the structure of which is the same as that of the first turbine.

[0014] Furthermore, the clutch assembly includes:

[0015] A threaded rod fixedly connected to the shaft of the first turbine, the threaded rod being coaxially arranged with the first turbine and the second turbine;

[0016] A sliding plate is sleeved on the threaded rod, the threaded rod and the sliding plate are connected by threads, a limit plate is provided on the outer shell to limit the sliding plate, and the switching valve is located at the end of the threaded rod near the first turbine;

[0017] A first clutch plate is slidably connected to the threaded rod. The first clutch plate rotates with the threaded rod. The first clutch plate is located at the end of the threaded rod away from the first flow acquisition component. A first compression spring and a wave washer are respectively provided on both sides of the first clutch plate. The two ends of the first compression spring abut against the sliding plate and the first clutch plate respectively. The two sides of the wave washer abut against the end of the first clutch plate and the threaded rod respectively.

[0018] A second clutch plate is fixedly connected to the end of the second turbine. When the threaded rod rotates, it drives the sliding plate to move on the threaded rod and controls the switching valve to switch the flow direction of the peritoneal fluid. The first compression spring presses the first clutch plate to move to the second clutch plate to fit the second clutch plate. When the second turbine is driven to rotate by the peritoneal fluid, the second turbine drives the threaded rod to rotate through the second clutch plate and the first clutch plate to drive the sliding plate to move on the threaded rod.

[0019] The suction tube is also equipped with a second control valve to control the closing of the suction tube.

[0020] Furthermore, a gear is provided on the outside of the switching valve core located in the switching valve, and a rack is provided on the sliding plate, with the gear meshing with the rack.

[0021] Furthermore, a magnet is provided on the first clutch plate, and an iron sheet is provided on the second clutch plate. The elastic force of the wave-shaped pad is the same as the attraction force of the magnet and the iron sheet.

[0022] Furthermore, a reset spring is also fitted on the rotating shaft outside the first cylinder of the first turbine. The two ends of the reset spring abut against the sliding plate and the first cylinder, so that the sliding plate can fit against the threaded end of the threaded rod.

[0023] Furthermore, the switching valve includes:

[0024] A switching valve housing is provided with an inlet pipe, a first outlet pipe, and a second outlet pipe, the first outlet pipe and the second outlet pipe being on the same circumference;

[0025] The switching valve core is a hollow valve body with a cylindrical shape. A connecting cavity is provided inside the switching valve core. An inlet and an outlet are provided on the side of the switching valve core. The inlet and outlet are located on different circumferences. When the switching valve core rotates, the inlet is connected to the inlet pipe, and the outlet switches back and forth between the first outlet pipe and the second outlet pipe.

[0026] Furthermore, the pipeline network is provided with a flushing inlet pipe and a flushing outlet pipe on the first flow acquisition component. The flushing outlet pipe is connected to the suction pipe and is provided with a one-way valve.

[0027] The pipeline network is provided with a suction outlet pipe and a suction inlet pipe at both ends of the second flow acquisition component. The suction inlet pipe and the flushing outlet pipe are connected to the suction pipe through a T-junction.

[0028] Furthermore, a first control valve is also provided on the flushing inlet pipe.

[0029] In summary, the present invention has the following advantages compared with the prior art:

[0030] The laparoscopic aspirator disclosed in this invention uses a first flow acquisition component and a second flow acquisition component to respectively count the flow rates of the rinsing fluid and the peritoneal fluid. Then, after the clutch component aspirates peritoneal fluid of the same volume as the rinsing fluid, it controls the switching valve to switch the direction of fluid discharge, so that the peritoneal fluid is separated into two parts, one of which is the same volume as the rinsing fluid, and the other is the amount of blood, making the calculation of bleeding volume more accurate. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the external structure of the endoscopic suction device disclosed in an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the internal structure of the endoscopic suction device disclosed in an embodiment of the present invention.

[0033] Figure 3 for Figure 2 A magnified view of a portion of the image shown in section I.

[0034] Figure 4 This is a schematic diagram of the sliding plate in the endoscopic suction device disclosed in an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the switching valve in the endoscopic suction device disclosed in an embodiment of the present invention.

[0036] Figure 6 for Figure 5 Full cross-section of AA.

[0037] Figure 7 for Figure 5 Full cross-section of BB.

[0038] Figure label:

[0039] 100. Outer shell; 110. Limiting plate;

[0040] 200. First flow acquisition component; 210. First turbine;

[0041] 300. Second flow acquisition component; 310. Second turbine;

[0042] 400, Clutch assembly; 410, Threaded rod; 420, Sliding plate; 421, Threaded hole; 422, Mounting plate; 430, First clutch disc; 440, Second clutch disc; 450, First compression spring; 460, Wave-shaped washer; 470, Baffle plate; 480, Magnet block; 490, Reset compression spring;

[0043] 500. Switching valve; 510. Switching valve housing; 511. Inlet pipe; 512. First outlet pipe; 513. Second outlet pipe; 520. Switching valve core; 521. Connecting cavity; 522. Inlet; 523. Outlet; 530. Gear; 540. Rack;

[0044] 600. First control valve;

[0045] 700, Second control valve;

[0046] 800. Piping network; 810. Flushing inlet pipe; 820. Flushing outlet pipe; 830. Suction outlet pipe; 840. Suction inlet pipe; 850. Check valve; 860. Tee pipe;

[0047] 900, suction tube. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a laparoscopic suction device, the laparoscopic suction device comprising:

[0050] Casing 100;

[0051] The first flow acquisition component 200 and the second flow acquisition component 300, which are disposed inside the housing 100, are used to acquire the flow rate of the injected cleaning fluid and the aspiration volume of peritoneal fluid, respectively.

[0052] A suction tube 900 is fixedly connected inside the housing 100, and the end of the suction tube 900 away from the housing 100 is used to penetrate into the abdominal cavity to perform cleaning and suction work;

[0053] A switching valve 500 located inside the housing 100 is used to switch the tubing after drawing in peritoneal fluid of the same volume as the cleaning fluid, so that the peritoneal fluid is separated into two parts, one of which has the same volume as the cleaning fluid.

[0054] A clutch assembly 400 is provided inside the housing 100. The clutch assembly 400 is connected to the first flow acquisition assembly 200 and the second flow acquisition assembly 300. The clutch assembly 400 is activated when the cleaning fluid is introduced, and controls the switching valve 500 to switch the outlet of the peritoneal fluid after the aspirated peritoneal fluid reaches the same volume as the flushing cleaning fluid.

[0055] A pipeline network 800 is provided inside the outer casing 100. The pipeline network 800 is connected to the first flow acquisition component 200, the second flow acquisition component 300, the switching valve 500, and the suction tube 900 through pipelines. When flushing, the pipeline network 800 passes the flushing fluid flowing out of the first flow acquisition component 200 into the suction tube 900. When aspirating peritoneal fluid, the pipeline network 800 controls the peritoneal fluid to pass through the second flow acquisition component 300 and then into the switching valve 500.

[0056] In this embodiment, during peritoneal irrigation, the irrigation fluid tubing is connected to the irrigation fluid port on the pipeline network 800, and the peritoneal fluid collection device (such as a metering bag) is connected to the fluid outlet port on the switching valve 500. The peritoneal fluid collection device has two sets that simultaneously generate negative pressure. During surgery, two scenarios exist:

[0057] In the first scenario, peritoneal fluid is aspirated before flushing. In this case, the switching valve 500 is connected to the second flow acquisition component 300 and the first receiving device for calculating blood volume. During flushing, the first flow acquisition component 200 switches the discharge direction of the switching valve 500 through the clutch component 400, so that the switching valve 500 is connected to the second receiving device for calculating flushing fluid. When aspirating peritoneal fluid, after the switching valve 500 receives peritoneal fluid of the same volume as the flushing fluid, the clutch component 400 controls the switching valve 500 to switch, so that the switching valve 500 is connected to the first receiving device.

[0058] In the second method, during surgery, the abdominal cavity is first irrigated, and then the peritoneal fluid is aspirated. The first flow acquisition component 200 switches the discharge direction of the switching valve 500 through the clutch component 400, so that the switching valve 500 is connected to the second receiving device for calculating the irrigation fluid. When aspirating the peritoneal fluid, after the switching valve 500 receives the same volume of peritoneal fluid as the irrigating fluid, the clutch component 400 controls the switching valve 500 to switch, so that the switching valve 500 is connected to the first receiving device.

[0059] The laparoscopic aspirator disclosed in this embodiment of the invention uses a first flow acquisition component 200 and a second flow acquisition component 300 to respectively count the flow rates of the rinsing fluid and the peritoneal fluid. Then, after the clutch component 400 aspirates the peritoneal fluid of the same volume as the rinsing fluid, it controls the switching valve 500 to switch the direction of fluid discharge, so that the peritoneal fluid is separated into two parts, one of which is the same volume as the rinsing fluid, and the other is the amount of blood, making the calculation of bleeding volume more accurate.

[0060] Specifically, in this embodiment, the outer casing 100 is gun-shaped, and the outer casing 100 is divided into two parts along its midline. The two parts are fixedly connected by bolts. The first flow acquisition component 200, the second flow acquisition component 300, the clutch component 400, the switching valve 500, and the pipeline network 800 are located inside the outer casing 100. One end of the suction tube 900 is fixedly connected to the outer casing 100. The suction tube 900 is a prior art technology.

[0061] like Figure 2 As shown, the first flow acquisition component 200 includes a hollow first cylinder and a first turbine 210 rotatably connected to the first cylinder. The first turbine 210 is provided with inclined blades. During rinsing, the rinsing fluid enters the first cylinder through the pipeline of the pipeline network 800 and drives the first turbine 210 to rotate through the blades. The number of rotations of the first turbine 210 can reflect the flow rate of the cleaning fluid.

[0062] The first cylinder can be a separate cylinder structure, or it can be formed by combining protrusions inside the outer shell 100. The inside of the first cylinder is a cylindrical cavity, and the two ends of the first turbine 210 are rotatably connected to the two ends of the first cylinder.

[0063] The pipeline network 800 is provided with a flushing inlet pipe 810 and a flushing outlet pipe 820 on both sides of the first cylinder. The flushing inlet pipe 810 is connected to a cleaning fluid interface for connecting to a cleaning fluid supply device. The flushing outlet pipe 820 is connected to the suction pipe 900 for delivering the cleaning fluid to the suction pipe 900.

[0064] The structure of the second flow acquisition component 300 is the same as that of the first flow acquisition component 200. The second flow acquisition component 300 includes a second cylinder and a second turbine 310. The structure of the second cylinder is the same as that of the first cylinder, and the structure of the second turbine 310 is the same as that of the first turbine 210.

[0065] The pipeline network 800 is provided with a suction outlet pipe 830 and a suction inlet pipe 840 at both ends of the second cylinder. The suction outlet pipe 830 is connected to the switching valve 500 and delivers peritoneal fluid to the switching valve 500. The suction inlet pipe 840 is connected to the suction pipe 900 and the peritoneal fluid in the suction pipe 900 enters the second cylinder through the suction inlet pipe 840. When the peritoneal fluid flows in the second cylinder, it drives the second turbine 310 to rotate.

[0066] In this embodiment, a one-way valve 850 is provided on the flushing outlet pipe 820, and the suction inlet pipe 840 and the flushing outlet pipe 820 are connected to the suction pipe 900 through a three-way pipe 860. The one-way valve 850 is used to prevent peritoneal fluid from flowing back into the first flow acquisition component 200.

[0067] As a preferred embodiment of this example, Figure 2 , Figure 3 As shown, the clutch assembly 400 includes:

[0068] A threaded rod 410 is fixedly connected to the shaft of the first turbine 210. The threaded rod 410 is provided with external threads and is coaxially arranged with the first turbine 210 and the second turbine 310.

[0069] A sliding plate 420 is sleeved on the threaded rod 410, the threaded rod 410 and the sliding plate 420 are connected by threads, a limit plate 110 is provided on the housing 100 to limit the sliding plate 420 to prevent it from rotating, and the switching valve 500 is provided at one end of the threaded rod 410 near the first turbine 210.

[0070] A first clutch plate 430 is slidably connected to the threaded rod 410. The first clutch plate 430 rotates with the threaded rod 410. The first clutch plate 430 is located at the end of the threaded rod 410 away from the first flow acquisition component 200. A first compression spring 450 and a wave washer 460 are respectively provided on both sides of the first clutch plate 430. The two ends of the first compression spring 450 abut against the sliding plate 420 and the first clutch plate 430 respectively. The two sides of the wave washer 460 abut against the first clutch plate 430 and the end of the threaded rod 410 respectively.

[0071] A second clutch plate 440 is fixedly connected to the end of the second turbine 310. When the threaded rod 410 rotates, it drives the sliding plate 420 to move on the threaded rod 410 and controls the switching valve 500 to switch the flow direction of the peritoneal fluid. The first compression spring 450 presses the first clutch plate 430 to move to the second clutch plate 440 to fit the second clutch plate 440. When the second turbine 310 is driven to rotate by the peritoneal fluid, the second turbine 310 drives the threaded rod 410 to rotate through the second clutch plate 440 and the first clutch plate 430 to drive the sliding plate 420 to move on the threaded rod 410.

[0072] The suction tube 830 is also provided with a second control valve 700 to control the closing of the suction tube 830;

[0073] In this embodiment, in the first case, when peritoneal fluid is aspirated without flushing, the sliding plate 420 is located at the end of the threaded rod 410 near the first turbine 210. At this time, the sliding plate 420 is not in contact with the switching valve 500. The switching valve 500 is in the open / closed position so that the switching valve 500 is connected to the first receiving device. The first compression spring 450 is not compressed, and the first clutch plate 430 and the second clutch plate 440 are disengaged. When peritoneal fluid is aspirated, the second turbine 310 rotates without driving the threaded rod 410 to rotate. The action when flushing is required is the same as in the second case. The second case will be described in detail below.

[0074] In the second scenario, when flushing fluid is introduced, the flushing fluid drives the first turbine 210 to rotate, which in turn drives the threaded rod 410 to rotate. The threaded rod 410 then drives the sliding plate 420 to move on the threaded rod 410. When the threaded rod 410 just begins to move, it activates the switching switch of the switching valve 500, connecting the switching valve 500 to the second receiving device. As flushing continues, the sliding plate 420 continues to move on the threaded rod 410, compressing the first compression spring 450. The first compression spring 450 pushes the first clutch plate 430 to engage with the second clutch plate 440 until flushing is complete. At this point, the first compression spring 450 is in a compressed state, and the length of movement of the sliding plate 420 on the threaded rod 410 reflects the amount of flushing fluid.

[0075] When aspirating peritoneal fluid, since the second clutch plate 440 and the first clutch plate 430 are in contact, the second turbine 310 rotates, causing the threaded rod 410 to rotate in the opposite direction. The sliding plate 420 moves in the opposite direction and is not in contact with the switching valve 500. At this time, the switching valve 500 is still connected to the second receiving device. When the sliding plate 420 moves to the end of the threaded rod 410 near the first turbine 210, the sliding plate 420 actuates the switching valve 500, causing the working mode of the switching valve 500 to change. The switching valve 500 is then connected to the first receiving device. The first compression spring 450 returns to its original state, and the wave-shaped washer 460 pushes the first clutch plate 430 away from the second clutch plate 440. When the first flow acquisition component 200 and the second flow acquisition component 300 are disengaged, since the structure of the first flow acquisition component 200 and the second flow acquisition component 300 are the same, after the sliding plate 420 returns to its original position, the number of rotations of the second turbine 310 is the same as the number of rotations of the first turbine 210. That is, the volume of the cleaning fluid flowing through the first turbine 210 is the same as the volume of the peritoneal fluid flowing through the second turbine 310. At this time, if the peritoneal fluid continues to be extracted, the second turbine 310 will no longer drive the threaded rod 410 to rotate. At this time, the peritoneal fluid flowing through the second flow acquisition component 300 flows into the first receiving device. The switching valve 500 separates the peritoneal fluid of the same volume as the cleaning fluid from the total peritoneal fluid, so that the peritoneal fluid in the first receiving device can reflect the blood volume.

[0076] Specifically, in this embodiment, the threaded rod 410 is fixed to the first turbine 210 by welding or connecting sleeve, such as... Figure 4As shown, the sliding plate 420 is polygonal, allowing the housing 100 to provide limiting plates 110 on both sides of the sliding plate 420 to limit the sliding plate 420 and prevent it from rotating. In this embodiment, the sliding plate 420 is square, and a threaded hole 421 is provided at the center of the sliding plate 420. The threaded hole 421 is sleeved on the threaded rod 410. The limiting plate 110 is elongated and located on both sides of the sliding plate 420.

[0077] In a preferred embodiment of this example, a gear 530 is provided on the outside of the switching valve 500 in the switching valve core 520. A mounting plate 422 is provided on the sliding plate 420. The mounting plate 422 is L-shaped and a rack 540 is fixedly connected to the mounting plate 422. The gear 530 meshes with the rack 540. When the sliding plate 420 just starts to move, the rack 540 drives the gear 530 to rotate. When the sliding plate 420 continues to move, the rack 540 disengages from the gear 530.

[0078] like Figure 3 As shown, the first clutch plate 430 is circular, and the first clutch plate 430 is connected to the threaded rod 410 by a key shaft. The first clutch plate 430 and the threaded rod 410 are connected by a spline, and the threaded rod 410 and the first clutch plate 430 are connected by a clearance, so that the first clutch plate 430 can slide on the threaded rod 410. The end of the threaded rod 410 is fixedly connected to a baffle plate 470 by a screw. The wave-shaped washer 460 is located between the baffle plate 470 and the first clutch plate 430. The wave-shaped washer 460 is used to control the first clutch plate 430 to disengage from the second clutch plate 440. The second clutch plate 440 is circular, and the second clutch plate 440 is fixedly connected to the end of the shaft of the second turbine 310 by a screw.

[0079] In a preferred embodiment of this invention, a magnet block 480 is provided on the first clutch plate 430, and an iron sheet is provided on the second clutch plate 440. The elastic force of the wave-shaped pad 460 is exactly the same as the attraction force of the magnet block 480 and the iron sheet, so that when the first compression spring 450 is compressed, the magnet block 480 can attract the iron sheet in time, thereby causing the second clutch plate 440 and the first clutch plate 430 to adhere to each other, thus improving sensitivity.

[0080] In a preferred embodiment of this invention, the first turbine 210 is further fitted with a reset spring 490 on the rotating shaft outside the first cylinder. The two ends of the reset spring 490 abut against the sliding plate 420 and the first cylinder, so that the sliding plate 420 can fit against the threaded end of the threaded rod 410. Thus, when the threaded rod 410 rotates, the sliding plate 420 can engage with the thread in time. At the same time, the sliding plate 420 can return to its original position by the reverse rotation of the first turbine 210, thereby achieving the purpose of returning to zero.

[0081] like Figure 5 and Figure 6 As shown, the switching valve 500 includes a switching valve housing 510 and a switching valve core 520. The switching valve housing 510 is provided with an inlet pipe 511 to connect to the suction outlet pipe 830, and a first outlet pipe 512 and a second outlet pipe 513 to connect to the first receiving device and the second receiving device. The switching valve housing 510 is a hollow valve body. The switching valve core 520 is cylindrical and has a connecting cavity 521 inside. The connecting cavity 521 has an inlet port 522 and an outlet port 523 on the side of the switching valve core 520. The inlet port 522 and the outlet port 523 are located on different circumferences. When the switching valve core 520 rotates, the inlet port 522 is always connected to the inlet pipe 511, and the outlet port 523 switches back and forth between the first outlet pipe 512 and the second outlet pipe 513. The first outlet pipe 512 and the second outlet pipe 513 are on the same circumference.

[0082] As a preferred embodiment of this example, Figure 2 As shown, a first control valve 600 is also provided on the flushing inlet pipe 810. Both the first control valve 600 and the second control valve 700 are existing technologies.

[0083] It should be noted that, Figure 2 The positional relationship described is for illustrative purposes only and does not reflect the actual positional relationship. It is shown for ease of understanding. In actual practice, the first control valve 600 and the second control valve 700 can be located at the handle of the housing 100, while other structures are located at the main body of the housing 100.

[0084] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0085] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0086] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laparoscopic suction device, characterized in that, The endoscopic suction device includes: shell; The first flow acquisition component and the second flow acquisition component, which are disposed inside the housing, are used to acquire the flow rate of the injected cleaning fluid and the aspiration volume of peritoneal fluid, respectively. A suction tube is fixedly connected inside the housing, with the end of the suction tube away from the housing extending into the abdominal cavity to perform cleaning and suction operations; The switching valve located inside the housing switches the pipeline after drawing in peritoneal fluid of the same volume as the cleaning fluid, so that the peritoneal fluid is separated into two parts, one of which has the same volume as the cleaning fluid. A clutch assembly is provided inside the housing. The clutch assembly is connected to the first flow acquisition assembly and the second flow acquisition assembly. The clutch assembly is activated when the cleaning fluid is introduced, and controls the switching valve to switch the outlet of the peritoneal fluid after the aspirated peritoneal fluid reaches the same volume as the flushing cleaning fluid. The pipeline network located inside the housing is connected to the first flow acquisition component, the second flow acquisition component, the switching valve, and the suction tube via pipelines. During flushing, the pipeline network directs the flushing fluid flowing out of the first flow acquisition component into the suction tube, and during the suction of peritoneal fluid, it controls the peritoneal fluid to pass through the second flow acquisition component and then into the switching valve. The pipeline network is provided with an outflow pipe and an inflow pipe at both ends of the second flow acquisition component.

2. The endoscopic suction device according to claim 1, characterized in that, The first flow acquisition component includes a hollow first cylinder and a first turbine rotatably connected to the first cylinder. The second flow acquisition component includes a second cylinder and a second turbine, and the structure of the second turbine is the same as that of the first turbine.

3. The endoscopic suction device according to claim 2, characterized in that, The clutch assembly includes: A threaded rod fixedly connected to the shaft of the first turbine, the threaded rod being coaxially arranged with the first turbine and the second turbine; A sliding plate is sleeved on the threaded rod, the threaded rod and the sliding plate are connected by threads, a limit plate is provided on the outer shell to limit the sliding plate, and the switching valve is located at the end of the threaded rod near the first turbine; A first clutch plate is slidably connected to the threaded rod. The first clutch plate rotates with the threaded rod. The first clutch plate is located at the end of the threaded rod away from the first flow acquisition component. A first compression spring and a wave washer are respectively provided on both sides of the first clutch plate. The two ends of the first compression spring abut against the sliding plate and the first clutch plate respectively. The two sides of the wave washer abut against the end of the first clutch plate and the threaded rod respectively. A second clutch plate is fixedly connected to the end of the second turbine. When the threaded rod rotates, it drives the sliding plate to move on the threaded rod and controls the switching valve to switch the flow direction of the peritoneal fluid. The first compression spring presses the first clutch plate to move to the second clutch plate to fit the second clutch plate. When the second turbine is driven to rotate by the peritoneal fluid, the second turbine drives the threaded rod to rotate through the second clutch plate and the first clutch plate to drive the sliding plate to move on the threaded rod. The suction tube is also equipped with a second control valve to control the closing of the suction tube.

4. The endoscopic suction device according to claim 3, characterized in that, The switching valve core located in the switching valve is provided with a gear on the outside of the switching valve, and a rack is provided on the sliding plate, the gear meshing with the rack.

5. The endoscopic suction device according to claim 3, characterized in that, The first clutch plate is also provided with a magnet, and the second clutch plate is provided with an iron sheet. The elastic force of the wave-shaped pad is the same as the attraction force of the magnet and the iron sheet.

6. The endoscopic suction device according to claim 3, characterized in that, The first turbine is also fitted with a reset spring on the rotating shaft outside the first cylinder. The two ends of the reset spring abut against the sliding plate and the first cylinder, so that the sliding plate can fit against the threaded end of the threaded rod.

7. The endoscopic suction device according to claim 4, characterized in that, The switching valve includes: A switching valve housing is provided with an inlet pipe, a first outlet pipe, and a second outlet pipe, the first outlet pipe and the second outlet pipe being on the same circumference; The switching valve core is a hollow valve body with a cylindrical shape. A connecting cavity is provided inside the switching valve core. An inlet and an outlet are provided on the side of the switching valve core. The inlet and outlet are located on different circumferences. When the switching valve core rotates, the inlet is connected to the inlet pipe, and the outlet switches back and forth between the first outlet pipe and the second outlet pipe.

8. The endoscopic suction device according to any one of claims 1-7, characterized in that, The pipeline network is provided with a flushing inlet pipe and a flushing outlet pipe on the first flow acquisition component. The flushing outlet pipe is connected to the suction pipe and a one-way valve is provided on the flushing outlet pipe. The suction inlet tube and the flushing outlet tube are connected to the suction tube via a T-junction.

9. The endoscopic suction device according to claim 8, characterized in that, The flushing inlet pipe is also equipped with a first control valve.

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