Laparoscope air filter

Abstract

The invention relates to a laparoscope air filter, and relates to the technical field of laparoscopic surgery. The device comprises a filter and a catheter communicated with the end of the filter, the catheter is used for being communicated with a puncture outfit and / or a pneumoperitoneum needle, the pneumoperitoneum needle is communicated with a pneumoperitoneum machine through a pipeline, and the end, away from the pneumoperitoneum needle, of the pneumoperitoneum machine is communicated with a carbon dioxide gas source. The filter is used for filtering gas in the puncture outfit or the pneumoperitoneum needle; the device has the effect of discharging smoke gas generated in the laparoscopic surgery process under the condition that the health of medical staff is not harmed.

Description

Technical Field

[0001] The present application relates to the technical field of laparoscopic surgery, and in particular to a laparoscopic air filter. Background Art

[0002] With the continuous improvement of medical level, laparoscopic minimally invasive surgery is becoming more and more popular. Minimally invasive technology in my country is also booming. In the prevalence of surgical operations, various surgical tools have been produced. For example, laparoscopic puncture devices are commonly used in laparoscopic minimally invasive surgery to open the patient's abdominal cavity and establish a channel for surgical instruments. In almost all surgical operations, active medical devices such as electroscalpels, electrocoagulation, and electric hooks are required, which not only facilitate the surgical operator, save a lot of surgical time, but also play an irreplaceable role in hemostasis. However, active cutting instruments all use the principle of current encountering resistance. Taking the electroscalpel pen as an example, when the cutting mode is started, the electroscalpel pen head generates instantaneous high temperature, gasifying the contacted tissue. When the tissue is instantly gasified, a large amount of smoke and gas is generated, and it quickly spreads throughout the abdominal cavity of the human body. At this time, the patient's entire abdominal cavity is filled with smoke, causing the surgical field to be blurred. If the doctor wants to continue the operation, the smoke in the patient's abdominal cavity must be cleared, and while the gas is discharged, an equal amount of gas must be delivered to the patient's abdominal cavity. Otherwise, the patient's abdominal cavity is flat and the operation cannot be performed.

[0003] The current method of exhausting smoke is to discharge the smoke directly into the operating room through a passage or a laparoscopic puncture device without filtering or any treatment. However, smoke is a mixed gas produced by the vaporization of patient tissue when heated. The gas contains a large amount of tissue cells and pathogens from the patient's body. If inhaled by medical staff in the operating room, it will cause great health hazards to them in the long run, so it needs to be improved. Summary of the invention

[0004] In order to discharge the smoke and gas generated during laparoscopic surgery without endangering the health of medical staff, the present application provides a laparoscopic air filter.

[0005] The present application provides a laparoscopic air filter, which adopts the following technical solution: A laparoscopic air filter comprises a filter and a conduit connected to the end of the filter, wherein the conduit is used to connect to a puncture device and / or a Veress needle, the Veress needle is connected to a pneumoperitoneum machine through a pipeline, and the end of the pneumoperitoneum machine away from the Veress needle is connected to a carbon dioxide gas source; the filter is used to filter the gas in the puncture device or the Veress needle.

[0006] By adopting the above technical solution, when active cutting instruments (such as puncture devices) used in laparoscopic surgery generate smoke and gas while contacting patient tissue and vaporizing the tissue, the smoke and gas will enter the filter through the catheter and be filtered by the filter, thereby reducing the occurrence of the above-mentioned smoke and gas being directly discharged and causing harm to the health of medical staff. In addition, carbon dioxide equal to the amount of smoke and gas discharged is pumped out by the pneumoperitoneum machine and introduced into the patient's abdominal cavity through the pneumoperitoneum needle to facilitate subsequent surgical operations.

[0007] Preferably, the filter comprises a filter membrane seat and a filter unit, wherein both ends of the filter membrane seat are respectively connected to the catheter, a filter cavity for communicating with the catheter is provided in the middle of the filter membrane seat, and the filter unit is located in the filter cavity. The filter unit comprises a filter membrane, a non-woven fabric and an activated carbon non-woven sheet from the outside to the inside.

[0008] Preferably, the filter membrane seat is further provided with a switching chamber for communicating with the filter chamber, and the switching chamber is provided with a plurality of filter units, and also includes a moving part, and the moving part is used to drive all the filter units to move so that the filter units move from the filter chamber to the switching chamber, or from the switching chamber to the filter chamber.

[0009] By adopting the above technical solution, multiple filter units are set up, and moving parts are used to realize the alternating movement of the filter units between the switching chamber and the filter chamber to realize the replacement of the filter units. This allows for convenient replacement of the filter units during long-term surgery or multiple consecutive surgeries, thereby ensuring the filtering effect of the filter units.

[0010] Preferably, the moving part includes a plurality of rings, a connecting frame connected to all the rings, and a rotating part for driving the connecting frame to rotate, and the switching chamber and the filter chamber are located on a moving path when the ring moves with the rotation of the connecting frame; the rings are arranged in a one-to-one correspondence with the filter units, the rings are sleeved on the periphery of the filter unit, and each of the rings is provided with a sealing ring along its circumference, and when the ring and its corresponding filter unit are installed in the filter chamber, the corresponding sealing ring fits against the side wall of the intersection of the filter chamber and the switching chamber.

[0011] By adopting the above technical solution, the connecting frame is driven to rotate by the rotating component, and then all the rings are driven to move with the rotation of the connecting frame, so that the rings move back and forth between the switching chamber and the filter chamber during the movement process, and a sealing ring is provided on the outer periphery of the ring of the present application. The sealing ring is used to fit with the side wall of the intersection of the filter chamber and the switching chamber when moving into the filter chamber, so as to achieve the sealing of the switching chamber and the filter chamber, reduce the filtered polluted gas and smoke from escaping into the switching chamber, so that the polluted gas and smoke can be concentratedly filtered by the filter unit in the filter chamber.

[0012] Preferably, a desiccant is provided along the circumference of the ferrule toward the inner peripheral wall.

[0013] By adopting the above technical solution, the setting of the desiccant can dehumidify the filter unit, reducing the occurrence of the situation where the multiple layers of non-woven fabrics contained in the filter unit are bonded to each other due to moisture, thereby affecting its filtering effect and the passage speed of gas through the filter unit.

[0014] Preferably, a discharge port is provided inside the filter membrane seat, the discharge port is connected to the switching chamber, and the discharge port is located below a moving path of the filter unit moving from the filter chamber to the switching chamber.

[0015] By adopting the above technical solution, when the filter unit needs to be replaced, the connecting frame is driven to rotate, so that the filter unit in the filter chamber is transferred to the switching chamber, and moves to above the discharge port during the rotation process, and then discharged under the action of the filter unit's own weight, thereby achieving automatic discharge of the scrapped filter unit while replacing the filter unit.

[0016] Preferably, a storage box for storing the filter unit is provided on the filter membrane seat, and a side wall of the storage box is connected to the switching chamber. A supply member is also provided on the filter membrane seat, and the supply member is used to transport the filter unit in the storage box to the empty ring.

[0017] By adopting the above technical solution, after the filter unit is discharged from the discharge port, the corresponding ring is empty, and the filter unit in the storage box can be inserted into the ring through the supply member to realize automatic supply of the filter unit, thereby reducing the operational burden of medical staff for frequent replacement of the filter unit.

[0018] Preferably, the supply member comprises a docking arc plate, a docking plug rod, a yielding spring, a docking gear set and a docking push plate; a supply channel is commonly connected between the side wall of the storage box and the filter membrane seat, and the docking push plate is slidably connected to the storage box along the length direction of the supply channel and passes through the bottom of the storage box during the sliding process; the end of the supply channel away from the storage box is a drop port; A material changing area is provided in the switching cavity between the filter cavity and the material dropping port, and the material changing area is located on the moving path of the filter unit; the material dropping port is located above the material changing area, and the discharge port is located below the material dropping port; The docking arc plate is connected to the material changing area by sliding along the arc direction of the material changing area through a yield spring, and the docking gear set is used to drive the docking push plate to slide in the direction close to the blanking port when the docking arc plate slides in the direction close to the bottom of the blanking port; the docking plug rods and rings are arranged in a one-to-one correspondence, and the docking plug rods are slidably connected to the corresponding rings; and when the yield spring is not deformed, the docking arc plate is located on the moving path of the docking plug rod moving with the rotation of the corresponding ring and the connecting frame, and the side wall of the docking arc plate is provided with a docking groove for the docking plug rod to be inserted.

[0019] By adopting the above technical scheme, the filter unit rotated out of the filter chamber is discharged through the discharge port under the action of its own weight during the process of being rotated to the material changing area. During this period, the docking rod on the ring is inserted into the docking arc plate, and drives the docking arc plate to move in the material changing area, and then the docking gear drives the docking push plate to move in the direction close to the drop-out port. The docking push plate penetrates the bottom of the storage box during the movement, so that the filter unit located at the bottom of the storage box is pushed toward the drop-out port by the docking push plate, and when the empty ring moves to below the drop-out port, the filter unit pushed by the docking push plate just falls into the ring through the drop-out port, and when the filter unit continues to move, the docking rod slides in the direction away from the docking arc plate, and the docking arc plate is reset under the drive of the yield spring.

[0020] Preferably, the inner diameter of the ring is much larger than the outer diameter of the filter unit, the docking rod is inserted through the corresponding side wall of the ring, and a docking spring is commonly connected between the docking rod and the ring, and a clamping plate is provided at one end of the docking rod facing the inner side of the ring. When the docking spring is not deformed, the docking rod is located outside the ring, and the clamping plate is inserted on the side of the ring away from the inner side; the inner walls of the switching chamber and the filter chamber of the membrane seat away from the material change area are provided with abutment strips for abutting against the docking rod, and the abutment strips are used to press the docking rod, deform the docking spring, and insert the clamping plate into the inner side of the ring, and when the clamping plate is inserted into the inner side of the ring, the filter unit in the ring can be abutted between the clamping plate and the inner wall of the ring.

[0021] By adopting the above technical scheme, when the ring moves to the material changing area, since there is no abutment strip in the material changing area, the docking rod will be located on the side away from the inner side of the ring under the elastic force of the docking spring, so that the docking rod is inserted into the docking groove, and when the ring rotates away from the material changing area, the docking rod is retracted into the ring by the pressure of the docking arc plate, and as the ring continues to move, the docking rod will abut against the abutment strip, so that the clamping plate is inserted into the inner side of the ring under the abutment of the abutment strip, and the function of the clamping plate is to position the filter unit in the ring, so that when the ring is rotated into the filter cavity, the filter unit can be aligned with the position where the conduit is connected, and the reason why the inner diameter of the ring is limited to be much larger than the outer diameter of the filter unit is to facilitate the filter unit falling from the drop port to fall smoothly into the ring during the movement of the ring to the bottom of the drop port.

[0022] Preferably, it also includes a filter replacement measurement and control module, the movable part is controlled by the filter replacement measurement and control module, the filter replacement measurement and control module is used to monitor the filtering capacity of the filter unit in the filter cavity, and determine whether the filter unit in the filter cavity needs to be replaced based on the filtering capacity, and when the filter unit in the filter cavity needs to be replaced, control the movable part to drive the filter unit to move, so that the filter units in the filter cavity and the switching cavity can be interchanged.

[0023] By adopting the above technical solution, the filtering capacity of the filter unit is detected in real time by replacing the filter measurement and control module, and when the filtering capacity is low, the moving parts are controlled to drive all the filter units to move, so as to realize the switching of the filter units in the filter cavity and the switching cavity, realize the replacement of the filter unit in the filter cavity, and ensure the filtering capacity of the filter unit in the filter cavity.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: When active cutting instruments (such as trocars) used in laparoscopic surgery come into contact with patient tissues and vaporize the tissues while generating smoke and gas, the smoke and gas will enter the filter through the catheter and be filtered by the filter to reduce the occurrence of direct discharge of the smoke and gas and the harm to the health of medical staff. In addition, carbon dioxide equal to the amount of smoke and gas discharged is pumped out by the pneumoperitoneum machine and injected into the patient's abdominal cavity through the pneumoperitoneum needle to facilitate subsequent surgical operations; The filter replacement measurement and control module is used to detect the filtering capacity of the filter unit in real time. When the filtering capacity is low, the moving parts are controlled to drive all the filter units to move, so as to realize the switching of the filter units in the filter cavity and the switching cavity, realize the replacement of the filter unit in the filter cavity, and ensure the filtering capacity of the filter unit in the filter cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the structure of a laparoscope air filter disclosed in an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram used to illustrate the filter structure in the embodiment of the present application.

[0027] Figure 3 It is a cross-sectional view used to illustrate the structure of the filter unit in the embodiment of the present application.

[0028] Figure 4 yes Figure 1 The cross-sectional view along the AA axis is a schematic diagram showing the structure of the filter cavity and the switching cavity.

[0029] Figure 5 yes Figure 2 The BB axis in the middle is a cross-sectional view used to reflect the positional relationship between the feed channel, the material exchange area and the discharge port.

[0030] Figure 6 It is a schematic diagram used to illustrate the connection relationship between the docking arc plate and the docking push plate in the embodiment of the present application.

[0031] Description of reference numerals: 1. filter; 11. filter membrane seat; 111. filter chamber; 1111. abutment strip; 112. switching chamber; 113. discharge port; 114. material change area; 115. material drop port; 12. filter unit; 121. filter membrane; 122. non-woven fabric; 123. activated carbon non-woven sheet; 124. shaping hoop; 2. catheter; 21. valve; 3. trocar; 4. pneumoperitoneum needle; 5. pneumoperitoneum machine; 6. Moving parts; 61, connecting frame; 62, ring; 621, desiccant; 622, sealing gasket; 633, clearance hole; 63, rotating parts; 7, storage box; 71, feeding channel; 8, feeding parts; 81, docking arc plate; 811, docking groove; 82, docking rod; 83, clearance spring; 84, docking gear set; 85, docking push plate; 86, clamping plate; 87, docking spring; 9, replace the filter measurement and control module. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-6 This application is described in further detail.

[0033] The present application embodiment discloses a laparoscope air filter. Figure 1The laparoscopic air filter comprises a filter 1 and a catheter 2 connected to both ends of the filter 1, and a valve 21 is provided on the catheter 2; one end of the catheter 2 is connected to a puncture device 3 or a pneumoperitoneum needle 4, and when the catheter 2 is connected to the pneumoperitoneum needle 4, the catheter 2 at the other end of the filter 1 is connected to a pneumoperitoneum machine 5, and one end of the pneumoperitoneum machine 5 away from the catheter 2 is connected to a carbon dioxide gas source; the filter 1 is used to filter the gas passing through the puncture device 3 or the pneumoperitoneum needle 4; specifically, when the catheter 2 is connected to the puncture device 3, the puncture device 3 acts on the patient's tissue, and the smoke gas generated in this process will pass through the puncture device 3 and the catheter 2 into the filter 1, and be discharged from the other end of the catheter 2 after being filtered by the filter 1, and when the catheter 2 is connected to the pneumoperitoneum needle 4, carbon dioxide can be delivered to the pneumoperitoneum needle 4 through the pneumoperitoneum machine 5, and the carbon dioxide will first pass through the catheter 2 to enter the filter 1 for filtration and then enter the patient's abdominal cavity through the pneumoperitoneum needle 4, so as to achieve filtering treatment of medical gas during surgery and polluted gas generated during surgery.

[0034] Reference Figure 2 and Figure 3 The filter 1 includes a filter membrane seat 11 and a filter unit 12. The catheter 2 is inserted through both ends of the filter membrane seat 11. A filter cavity 111 for communicating with the catheter 2 is opened inside the filter membrane seat 11. The filter unit 12 is located in the filter cavity 111. Each filter unit 12 includes a filter membrane 121, a non-woven fabric 122 and an activated carbon non-woven sheet 123 from the outside to the inside, and the outer edges of the filter membrane 121, the non-woven fabric 122 and the activated carbon non-woven sheet 123 are fixedly connected with a shaping hoop 124, so that the shaping hoop 124 is used to fix and splice together the multi-layer fabric structure composed of the filter membrane 121, the non-woven fabric 122 and the activated carbon non-woven sheet 123.

[0035] Reference Figure 2 and Figure 4 A switching chamber 112 is also provided in the filter membrane seat 11. The switching chamber 112 is connected to the filter chamber 111, and the switching chamber 112 and the filter chamber 111 are combined into a circular chamber. A moving part 6 is provided in the filter membrane seat 11. The moving part 6 includes a connecting frame 61, a rotating part 63 and a plurality of rings 62. The connecting frame 61 is rotatably connected to the filter membrane seat 11. The rotating part 63 is used to drive the connecting frame 61 to rotate. All rings 62 are connected to the connecting frame 61, and the filter chamber 111 is located on the moving path of the ring 62 when it moves with the rotation of the connecting frame 61.

[0036] Reference Figure 2 and Figure 4The inner side of the ferrule 62 is used for inserting the filter unit 12. The inner wall of the ferrule 62 is embedded with a desiccant 621 along its circumference. The desiccant 621 can be activated carbon. The outer wall of the ferrule 62 is connected to a rubber sealing gasket 622 at both ends. When the ferrule 62 is rotated into the filter chamber 111, the sealing gasket 622 abuts against the inner wall at the intersection of the filter chamber 111 and the switching chamber 112, so as to isolate the filter chamber 111 and the switching chamber 112, so that the gas or smoke in the conduit 2 is not easy to escape into the switching chamber 112.

[0037] Reference Figure 4 The connecting frame 61 of the present application is as follows Figure 4 The clockwise rotation direction is indicated by the arrow D in the middle. A material changing area 114 is provided inside the switching chamber 112, and the material changing area 114 is located on the moving path of the ring 62 from the filter chamber 111 to the switching chamber 112. A discharge port 113 is provided on the bottom wall of the filter membrane holder 11 located at the material changing area 114, and the bottom wall of the filter membrane holder 11 located at the material changing area 114 is tilted downward, so that the filter unit 12 in the ring 62 moving from the filter chamber 111 to the material changing area 114 can fall into the discharge port 113 under the action of the tilted bottom wall and its own weight, so as to be discharged from the filter membrane holder 11.

[0038] Reference Figure 2 , Figure 4 and Figure 5 , a storage box 7 is provided on the filter membrane seat 11, and a plurality of unused filter units 12 are placed in the storage box 7 along the height direction of the storage box 7. A feeding channel 71 is commonly connected between the side wall of the storage box 7 and the filter membrane seat 11, and one end of the feeding channel 71 close to the filter membrane seat 11 is a feeding port 115, and the feeding port 115 is located above the end of the material replacement area 114 away from the filter cavity 111, that is, located above the moving path of the ring 62 moving with the rotation of the connecting frame 61, and the discharge port 113 is located between the filter cavity 111 and the feeding port 115; a feeding member 8 is provided on the filter membrane seat 11, and the feeding member 8 is used to push the single filter unit 12 at the bottom of the storage box 7 to the feeding port 115, so that the filter unit 12 falls from the feeding port 115, so that when the empty ring 62 for discharging the filter unit 12 moves to above the feeding port 115, the filter unit 12 can be inserted into the empty ring 62, thereby realizing the automatic supply of the filter unit 12.

[0039] Reference Figure 4 , Figure 5 and Figure 6The supply member 8 includes a docking arc plate 81, a docking plug rod 82, a yielding spring 83, a docking gear set 84 and a docking push plate 85. The docking arc plate 81 is slidably connected to the inner wall of the filter membrane seat 11 outside the material changing area 114 along the arc direction of the material changing area 114. The yielding spring 83 is connected between the docking arc plate 81 and the filter membrane seat 11, and the expansion and contraction direction of the yielding spring 83 is parallel to the sliding direction of the docking arc plate 81.

[0040] The docking push plate 85 is slidably connected between the storage box 7 and the filter membrane seat 11, and the sliding direction of the docking push plate 85 is parallel to the feed channel 71, and the docking push plate 85 will pass through the bottom of the storage box 7 and be inserted into the feed channel 71 during the sliding process; the docking gear set 84 includes two docking gears coaxially connected to the filter membrane seat 11, and the side walls of the docking push plate 85 and the docking arc plate 81 are provided with tooth grooves for engaging with the docking gears, one of the docking gears is engaged with the docking push plate 85, and the other docking gear is engaged with the docking arc plate 81.

[0041] A clearance hole 633 is formed through the side wall of each ferrule 62 , and the docking rods 82 are arranged one by one corresponding to the ferrules 62 , and the docking rods 82 are slidably connected to the inner wall of the corresponding clearance hole 633 . A docking spring 87 is commonly connected between the docking rod 82 and the inner wall of the clearance hole 633, and a clamping plate 86 is connected to the end of the docking rod 82 facing the inner side of the ring 62. When the docking spring 87 is not deformed, the clamping plate 86 is completely inserted into the clearance hole 633, and the docking rod 82 is located outside the ring 62. The inner wall of the filter cavity 111 and the inner wall of the switching cavity 112 away from the material replacement area 114 are provided with abutment strips 1111 for abutting against the docking rod 82. When the docking rod 82 conflicts with the abutment strips 1111, the docking spring 87 is deformed and the clamping plate 86 is inserted into the inner side of the ring 62, so that the filter unit 12 in the ring 62 is clamped between the clamping plate 86 and the inner wall of the ring 62. The side wall of the docking arc plate 81 is provided with a docking groove 811 for inserting the docking rod 82, and when the docking spring 87 is not deformed, the docking rod 82 on the ring 62 rotated to the material changing area 114 will be inserted into the docking groove 811, and under the limiting action of the inner wall of the docking groove 811, the docking arc plate 81 is driven to move along the material changing area 114 together with the ring 62.

[0042] The inner diameter of the ferrule 62 is much larger than the outer diameter of a single filter unit 12, and when the ferrule 62 is rotated to the bottom of the drop opening 115, the filter unit 12 at the bottom of the storage box 7 is just pushed to the drop opening 115 by the docking push plate 85, so that the filter unit 12 is inserted into the ferrule 62, and at this time, the docking rod 82 is also inserted into the docking groove 811, and then, the connecting frame 61 continues to drive the ferrule 62 to rotate, so that the docking rod 82 moves relative to the docking arc plate 81, and is docked during the movement. The arc plate 81 is pressed by the side wall and moves toward the direction close to the clearance hole 633, thereby disengaging from the docking groove 811, and abuts against the abutment bar 1111 during the rotation of the ring 62, so that the clamping plate 86 is inserted into the inside of the ring 62, so that the filter unit 12 in the ring 62 is clamped between the clamping plate 86 and the inner wall of the ring 62, so as to realize the positioning of the filter unit 12, so that when the ring 62 is installed in the filter cavity 111, the filter unit 12 is located in the axial direction of the catheter 2.

[0043] Reference Figure 1 and Figure 2 , further comprising replacing the filter measurement and control module 9, the replacement of the filter measurement and control module 9 may specifically be a sensor disposed on the branch pipes on both sides of the filter 1, and a PLC controller (not shown in the figure) electrically connected to the sensor, the sensor may specifically be a flow sensor or a particle concentration sensor, and obtain the flow data or concentration data of the branch pipes on both sides of the filter 1, as well as the flow difference or concentration data difference of the branch pipes on both sides; and a corresponding relationship table may be preset in the PLC controller, in which a plurality of initial flow ranges and initial concentration ranges, as well as a preset difference corresponding to each initial flow range and initial concentration range are stored; P The LC controller will use the flow data or concentration data of the gas before it enters the filter 1 as the initial flow data or initial concentration data according to the gas flow direction, and determine the corresponding preset difference based on the initial flow data or initial concentration data and the preset correspondence table, and then compare the aforementioned flow difference or concentration difference with the preset difference. When the flow difference and the concentration difference are less than the preset difference, it is considered that the filtering capacity of the filter unit 12 is low and needs to be replaced. At this time, the PLC controller controls the rotating component 63 to drive the connecting frame 61 to rotate. The rotating component 63 can specifically be a motor connected to the rotation center of the connecting frame 61.

[0044] The implementation principle of a laparoscopic air filter in the embodiment of the present application is as follows: when performing laparoscopic surgery, the smoke or gas generated during the operation, or the carbon dioxide delivered to the patient, will be passed into the filter 1 through the catheter 2, and filtered through the filter unit 12, and the filter capacity of the filter unit 12 will be detected in real time by replacing the filter measurement and control module 9. When the filtering capacity of the filter unit 12 is low, the collar 62 is controlled to rotate so that the collar 62 located in the filter cavity 111 is transferred to the material replacement area 114. At this time, the filter unit 12 located in the collar 62 will be discharged from the discharge port 113. In this process, the collar 62 drives the docking arc plate 81 and the docking push plate 85 to move, so that the docking push plate 85 is inserted into the storage box 7, and the filter unit 12 at the bottom of the storage box 7 is pushed to the drop opening 115. During this process, the docking push plate 85 is always inserted at the bottom of the storage box 7, and the filter unit 12 moved to the drop opening 115 just falls and is inserted into the ferrule 62 when the ferrule 62 moves below the drop opening 115, and then the ferrule 62 continues to move, so that the docking rod 82 is separated from the docking ring plate, the docking ring plate is reset, and the clamping plate 86 is inserted into the ferrule 62, thereby realizing the replacement of the filter unit 12 in the ferrule 62, and when the ferrule 62 completes the replacement of the filter unit 12, the other ferrule 62 with the filter unit 12 just moves into the filter cavity 111 and is located in the axial direction of the catheter 2.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laparoscope air filter, characterized in that: The invention comprises a filter (1) and a catheter (2) connected to the end of the filter (1), wherein the catheter (2) is used to connect to a puncture device (3) and / or a Veress needle (4), wherein the Veress needle (4) is connected to a pneumoperitoneum machine (5) via a pipeline, and the end of the pneumoperitoneum machine (5) away from the Veress needle (4) is connected to a carbon dioxide gas source; the filter (1) is used to filter the gas in the puncture device (3) or the Veress needle (4).

2. The laparoscopic air filter according to claim 1, characterized in that: The filter (1) comprises a filter membrane seat (11) and a filter unit (12); both ends of the filter membrane seat (11) are respectively connected to the conduit (2); a filter cavity (111) for communicating with the conduit (2) is provided in the middle of the filter membrane seat (11); the filter unit (12) is located in the filter cavity (111); and the filter unit (12) comprises, from the outside to the inside, a filter membrane (121), a non-woven fabric (122), and an activated carbon non-woven sheet (123).

3. The laparoscopic air filter according to claim 2, characterized in that: The filter membrane seat (11) is further provided with a switching chamber (112) for communicating with the filter chamber (111), wherein a plurality of filter units (12) are provided in the switching chamber (112), and further comprises a moving member (6), wherein the moving member (6) is used to drive all the filter units (12) to move, so that the filter units (12) move from the filter chamber (111) to the switching chamber (112), or move from the switching chamber (112) to the filter chamber (111).

4. The laparoscopic air filter according to claim 3, characterized in that: The moving member (6) comprises a plurality of ferrules (62), a connecting frame (61) connected to all the ferrules (62), and a rotating member (63) for driving the connecting frame (61) to rotate; the switching chamber (112) and the filter chamber (111) are located on a moving path when the ferrule (62) moves along with the rotation of the connecting frame (61); the ferrules (62) and the filter units (12) are arranged in a one-to-one correspondence; the ferrules (62) are sleeved on the periphery of the filter unit (12), and a sealing ring is provided on the periphery of each ferrule (62) along its circumference; when the ferrule (62) and its corresponding filter unit (12) are arranged in the filter chamber (111), the corresponding sealing ring is attached to the side wall of the intersection and connection between the filter chamber (111) and the switching chamber (112).

5. The laparoscopic air filter according to claim 4, characterized in that: The ferrule (62) is provided with a desiccant (621) along its circumference facing the inner peripheral wall.

6. The laparoscopic air filter according to claim 4, characterized in that: The filter membrane seat (11) is provided with a discharge port (113) inside, the discharge port (113) is connected to the switching chamber (112), and the discharge port (113) is located below the moving path of the filter unit (12) moving from the filter chamber (111) to the switching chamber (112).

7. The laparoscopic air filter according to claim 4, characterized in that: The filter membrane seat (11) is provided with a storage box (7) for storing the filter unit (12); the side wall of the storage box (7) is connected to the switching chamber (112); the filter membrane seat (11) is also provided with a supply member (8); the supply member (8) is used to transport the filter unit (12) in the storage box (7) to the empty ring (62).

8. The laparoscopic air filter according to claim 7, characterized in that: The supply member (8) comprises a docking arc plate (81), a docking plug rod (82), a yielding spring (83), a docking gear set (84) and a docking push plate (85); a supply channel (71) is commonly connected between the side wall of the storage box (7) and the filter membrane seat (11); the docking push plate (85) is slidably connected to the storage box (7) along the length direction of the supply channel (71) and passes through the bottom of the storage box (7) during the sliding process; the end of the supply channel (71) away from the storage box (7) is a drop opening (115); A material changing area (114) is provided in the switching chamber (112) between the filter chamber (111) and the material dropping opening (115), and the material changing area (114) is located on the moving path of the filter unit (12); the material dropping opening (115) is located above the material changing area (114), and the discharge port (113) is located below the material dropping opening (115); The docking arc plate (81) is connected to the material changing area (114) by sliding along the arc direction of the material changing area (114) through a yield spring (83); the docking gear set (84) is used to drive the docking push plate (85) to slide in the direction close to the blanking opening (115) when the docking arc plate (81) slides in the direction close to the bottom of the blanking opening (115); the docking plug rod (82) and the ring (62) are arranged in a one-to-one correspondence, and the docking plug rod (82) is slidably connected to the corresponding ring (62); and when the yield spring (83) is not deformed, the docking arc plate (81) is located on the moving path of the docking plug rod (82) moving with the rotation of the corresponding ring (62) and the connecting frame (61), and the side wall of the docking arc plate (81) is provided with a docking groove (811) for the docking plug rod (82) to be inserted.

9. The laparoscopic air filter according to claim 8, characterized in that: The inner diameter of the ferrule (62) is much larger than the outer diameter of the filter unit (12); the docking rod (82) is inserted through the corresponding side wall of the ferrule (62); a docking spring (87) is commonly connected between the docking rod (82) and the ferrule (62); and a clamping plate (86) is provided at one end of the docking rod (82) facing the inner side of the ferrule (62); When the docking spring (87) is not deformed, the docking rod (82) is located outside the ferrule (62), and the clamping plate (86) is inserted on the side of the ferrule (62) away from the inner side; the inner walls of the switching chamber (112) and the filter chamber (111) of the filter membrane seat (11) away from the material change area (114) are both provided with abutment strips (1111) for abutting against the docking rod (82), and the abutment strips (1111) are used to press the docking rod (82), so that the docking spring (87) is deformed, and the clamping plate (86) is inserted into the inner side of the ferrule (62); and when the clamping plate (86) is inserted into the inner side of the ferrule (62), the filter unit (12) in the ferrule (62) can be abutted between the clamping plate (86) and the inner wall of the ferrule (62).

10. The laparoscopic air filter according to claim 3, characterized in that: The invention also comprises a filter replacement measurement and control module (9), wherein the movable member (6) is controlled by the filter replacement measurement and control module (9), and the filter replacement measurement and control module (9) is used to monitor the filtering capacity of the filter unit (12) in the filter cavity (111), and determine whether the filter unit (12) in the filter cavity (111) needs to be replaced based on the filtering capacity, and when the filter unit (12) in the filter cavity (111) needs to be replaced, control the movable member (6) to drive the filter unit (12) to move, so that the filter units (12) in the filter cavity (111) and the switch cavity (112) are interchangeable.

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