Smoke filtering device for laparoscopic surgery

Abstract

The utility model discloses a smoke filtering device for laparoscopic surgery, which relates to the field of smoke exhaust for laparoscopic surgery, aims to solve the problems of resource waste and incapability of liquid drainage in the prior art, and adopts the technical scheme that an upper cover and a main body are detachably connected, so that a filtering material can be replaced after use, and the inside can be cleaned and sterilized; the requirement for repeated use is met, overall purchase is reduced to only purchase of the filter element, the purchase cost is greatly reduced, the liquid drainage mechanism and the plugging mechanism are arranged at the collecting tank, liquid can be automatically drained when the liquid level reaches a certain height, and the situation that the liquid drainage mechanism is mistakenly opened when the air pressure in the collecting tank is high and the liquid level is low can be avoided. The whole structure is simple, easy to use and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of laparoscopic surgery smoke extraction technology, specifically a laparoscopic surgery smoke filtration device. Background Technology

[0002] During laparoscopic surgery, procedures such as electrocoagulation and electrocautery generate a large amount of smoke. If this smoke is not removed in a timely and effective manner, it will seriously affect the clarity of the surgical field, prolong the operation time, and increase the surgical risk.

[0003] Chinese patent CN216498123U discloses a laparoscopic surgery smoke filtering device. The technical solution includes a filter box containing a gas-liquid separation collection tank, a gas filter element, and a speed regulating valve for controlling the gas flow rate. When connected to a suction device, this structure can filter the gas and ensure the clarity of the surgical field.

[0004] However, this existing technology uses a disposable device that needs to be disposed of after each surgery. Purchasing a complete filtration system is costly and results in significant resource waste. Furthermore, the existing technology lacks a drainage system in the collection tank, requiring the filtration system to be replaced when the tank is full, which negatively impacts the continuity of the surgical procedure. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a laparoscopic surgery smoke filtering device that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model discloses a laparoscopic surgical smoke filtration device. The technical solution includes a main body with an inlet connector and an outlet connector connected to it. The main body contains a collection tank, a filter tank, and a speed control tank, all three connected together. The inlet connector is connected to the collection tank, and the outlet connector is connected to the speed control tank. A speed control valve is installed in the speed control tank. A filter element is located in the filter tank. A top cover is connected to the main body, and the top cover and the main body are detachably connected with a sealing ring at the connection point. This allows for cleaning, sterilization, and filter element replacement after use, facilitating reuse. The collection tank is equipped with a drainage mechanism to drain the collected liquid, facilitating continuous surgery. However, if all the liquid in the collection tank is drained, there may be a problem of gas leakage from the drainage mechanism. Therefore, a sealing mechanism is provided on the drainage mechanism. The filter element is detachably connected to the filter tank, allowing for filter element replacement. The filter element is also connected to a clamping mechanism to prevent air leakage at the filter element inlet.

[0007] As a preferred embodiment of this utility model, the filter element includes a housing, and the housing contains filter material; the two ends of the housing have an air inlet and an air outlet, respectively, the air inlet is used for gas to enter the filter element, and the filtered gas leaves from the air outlet.

[0008] In a preferred embodiment of this invention, the collection tank and the filter tank are connected by an air inlet pipe. A first sealing ring is located at the rear end of the air inlet pipe, and the first sealing ring is coaxial with the air inlet. The pressing mechanism includes a sliding pressing member. A sliding groove is formed on the main body, and the sliding groove is connected to the filter tank. The sliding pressing member is slidably connected within the sliding groove. One end of the sliding pressing member is in slidable contact with the rear end of the filter element, and a first spring is press-fitted between the other end and the sliding groove. The first spring pushes the sliding pressing member, causing the air inlet of the filter element to press against the first sealing ring, thus achieving a seal at the inlet.

[0009] As a preferred embodiment of this utility model, the draining mechanism includes an extension pipe, a drain port is provided on the collection tank, the drain port is connected to the extension pipe, the extension pipe is connected to the sealing mechanism, and the drain port is used to discharge the collected liquid in the collection tank.

[0010] As a preferred embodiment of this utility model, the sealing mechanism includes a housing and a liquid level detector. A detection hole is formed on the main body, and a connecting pipe is detachably connected to the detection hole. The liquid level detector is hinged within the connecting pipe, and a float is connected to one end of the rotating rod of the liquid level detector within the main body. The housing is detachably connected to the outer wall of the main body, and a transmission rod is hinged inside it. The end of the transmission rod and the rotating rod are detachably connected with a transmission relationship. A stop rod is connected to the transmission rod. An indicator rod is slidably connected to the housing, and a valve core is connected to the end of the indicator rod. The valve core slides in contact with the outlet of the extension tube, enabling it to seal the extension tube. A second spring is press-fitted between the valve core and the housing. The stop rod slides in contact with the outer end face of the valve core. A rise in the liquid level pushes the float upward, thereby causing the rotating rod to rotate, disengaging the stop rod from the outer end face of the valve core. This allows the valve core to open and drain under the combined action of hydraulic and pneumatic pressure within the collection tank, achieving both liquid drainage and preventing gas leakage.

[0011] As a preferred technical solution of this utility model, the upper cover and the main body are fastened together.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By making the top cover and the main body detachably connected, this utility model realizes the feasibility of cleaning the inside of the filter device and replacing consumables, which facilitates the reuse of the filter device; the clamping mechanism can seal around the filter element inlet, reducing the risk of air leakage; the draining mechanism can automatically drain the liquid collected in the collection tank, ensuring the continuity of the surgical process, and the sealing device connected to the draining mechanism can seal the draining mechanism when the liquid in the collection tank is low, preventing the smoke generated during the operation from leaking from the draining mechanism. The sealing mechanism uses a float ball to control the locking and opening of the draining, which can ensure that the draining will only be opened when the liquid level reaches a certain height, and will be closed again after a certain amount is discharged, avoiding the risk of the draining mechanism being opened accidentally when the air pressure in the collection tank is high and the liquid is low. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the main body of this utility model;

[0015] Figure 3 This is a top view of the internal structure of the main body of this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the main body of this utility model without a filter element installed;

[0017] Figure 5 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0018] Figure 6 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 7 This is an enlarged structural diagram of section B of the present invention;

[0020] Figure 8 This is a schematic diagram of the valve core structure of this utility model;

[0021] Figure 9 This is an enlarged structural diagram of point C in this utility model;

[0022] Figure 10 This is a schematic diagram of the liquid level detector structure of this utility model;

[0023] Figure 11 This is a schematic diagram of the connecting pipe structure of this utility model. Figure 1 ;

[0024] Figure 12 This is a schematic diagram of the connecting pipe structure of this utility model. Figure 2 ;

[0025] Figure 13 This is a schematic diagram of the filter element structure of this utility model.

[0026] In the diagram: 1. Main body; 101. Inlet connector; 102. Outlet connector; 103. Air inlet pipe; 1031. First sealing ring; 104. Collection tank; 105. Filter tank; 106. Speed ​​control tank; 107. Slot; 108. Slide groove; 109. Extension pipe; 110. Drain outlet; 111. Positioning rod; 2. Top cover; 201. Buckle; 3. Speed ​​control valve; 4. Filter element; 401. Housing; 402. Air inlet; 403. Finger groove; 404. Air outlet; 5. Push plate; 6. Slide rod; 7. Synchronization plate; 8. First 9. Spring; 10. Housing; 11. First observation window; 12. Second observation window; 13. Connecting bolt; 14. Transmission rod; 15. Hexagonal prism; 16. Stop bar; 17. Indicator rod; 18. Drain connector; 19. Valve core; 10. Plug; 11. Adapter; 12. Second spring; 13. Outer ring plate; 14. Connecting pipe; 15. Pipe body; 16. Second sealing ring; 17. Screw; 18. Liquid level detector; 19. Rotating rod; 10. Float; 11. Settling tank. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0028] like Figures 1 to 13 As shown, this utility model discloses a laparoscopic surgery smoke filtering device. The technical solution adopted is as follows: it includes a main body 1, with an inlet connector 101 and an outlet connector 102 connected to both ends of the main body 1. Both of them are Luer connectors. The main body 1 has slots 107 on both sides. The main body 1 is connected to an upper cover 2. The upper cover 2 has buckles 201 on both sides, which are fastened to the slots 107.

[0029] like Figure 2 , Figure 4As shown, the main body 1 is divided into a collection tank 104, a filter tank 105, and a speed regulating tank 106. The inlet connector 101 is connected to the collection tank 104. The speed regulating tank 106 is located at the rear end of the filter tank 105. The function of the collection tank 104 is to collect the liquid carried in the smoke to achieve the effect of gas-liquid separation. The collection tank 104 is connected to the filter tank 105. However, in order to prolong the residence time of the smoke in the collection tank 104 and achieve more complete gas-liquid separation, the collection tank 104 and the filter tank 105 are connected through an air inlet pipe 103. The inlet connector 101 is connected to the inlet pipe. The tail end of the inlet pipe is closer to the filter tank 105 than the inlet of the air inlet pipe 103, so that the gas entering the collection tank 104 enters the air inlet pipe 103 in a serpentine flow.

[0030] To ensure the continuity of the surgery, such as Figure 9 As shown, a drain port 110 is provided on the side wall of the collection tank 104 for discharging the collected liquid. However, to prevent gas leakage from the drain port 110, as shown... Figure 7 As shown, an extension tube 109 is provided on the outer wall of the main body 1. The extension tube 109 is connected to the drain port 110 and is lower than the drain port 110. A valve core 14 is provided at the opening of the extension tube 109 to seal it. A first threaded hole is also provided on the outer wall of the main body 1. The first threaded hole is a countersunk hole. A housing 9 is installed on the outer wall of the main body 1. The housing 9 is an open-ended shell structure that is fastened to the outer wall of the main body 1. The extension tube 109 is located inside the housing 9. The opening of the housing 9 has a flange plate with a first bolt hole. The housing 9 can be installed on the main body 1 by screwing a connecting bolt 10 through the first bolt hole and screwing it into the first threaded hole. An indicator hole is provided on the side wall of the housing 9 opposite to the opening. Figure 8 As shown, the valve core 14 includes a plug 1401, which is frustoconical in shape and used to seal the opening of the extension tube 109. A transition head 1402 is provided on the large-diameter end face of the plug 1401. The transition head 1402 is connected to the indicator rod 12, which is slidably connected in the indicator hole. A second spring 15 is fitted on the indicator rod 12. The second spring 15 is press-fitted between the transition head 1402 and the housing 9 to form a one-way valve structure. A drain connector 13 is provided on the bottom surface of the housing 9 away from the opening. The bottom surface of the housing 9 is an inclined surface that slopes towards the drain connector 13, so that the liquid entering the housing 9 flows away from the opening of the housing 9 and is discharged by the drain connector 13, preventing the liquid from accumulating at the opening of the housing 9 and causing leakage.

[0031] To prevent the valve core 14 from opening accidentally when the air pressure in the collection tank 104 is high but the liquid level is low, a detection hole is also provided on the collection tank 104. The detection hole is located above the drain port 110, and a connecting pipe 17 is inserted into the detection hole. Figure 11 , Figure 12As shown, the tube body 1701 of the connecting tube 17 has an end plate at one end inside the collection tank 104, and a screw 1703 is provided on the end face outside the main body 1. It also includes an outer ring plate 16. The outer ring plate 16 has a through hole that corresponds to the position and size of the screw 1703. The screw 1703 is passed through the through hole and locked with a nut. The connecting tube 17 can be fixed at the detection hole by the cooperation of the end plate and the outer ring plate 16. In order to seal the joint between the connecting tube 17 and the detection hole, a second sealing ring 1702 is fitted on the tube body 1701. The end plate and the inner wall of the collection tank 104 press the second sealing ring 1702 to seal the joint.

[0032] like Figure 9 , Figure 10 As shown, a liquid level detector 18 is hinged in the connecting pipe 17. One end of the rotating rod 1801 of the liquid level detector 18, located in the collection tank 104, is connected to a float 1802 via a connecting rod. The connecting rod is perpendicular to the rotating rod 1801. As the liquid level in the collection tank 104 rises, the float 1802 floats, causing the rotating rod 1801 to rotate. To prevent the connecting rod from pointing vertically downwards and causing the float 1802 to lose its buoyancy, a positioning rod 111 is provided on the inner wall of the collection tank 104. When the liquid level in the collection tank 104 is not in contact with the float 1802, the connecting rod rests on the positioning rod 111 from above, thus the positioning rod 111 defines the lowest point of the float 1802. A hexagonal recess 1803 is formed on the end face of the rotating rod 1801 located outside the collection tank 104. Figure 7 As shown, a transmission rod 11 is hinged to the housing 9 via a bearing seat. One end of the transmission rod 11 is coaxially connected to a hexagonal prism 1101, which is inserted into a recess 1803. A screw hole is also provided on the side wall of the housing 9 opposite to the opening. A handle is provided after the other end of the transmission rod 11 passes through the screw hole. A stop rod 1102 is connected to the transmission rod 11. The stop rod 1102 is perpendicular to the transmission rod 11 and slides in contact with the end face of the plug 1401 of the valve core 14. The transition head 1402 on the valve core 14 allows the second spring 15 to be pressed between the end face of the transition head 1402 and the housing 9. When the stop rod 1102 is in contact with the end face of the plug 1401, it can rest on the side of the transition head 1402, thereby preventing the stop rod 1102 from contacting the second spring 15.

[0033] To facilitate the insertion of the hexagonal prism 1101 into the recess 1803 during installation, a first observation window 901 corresponding to the position of the hexagonal prism 1101 is provided on the outer casing 9. To facilitate the inspection of the blockage of the extension tube 109 by the blockage 1401 during installation, a second observation window 902 corresponding to the position of the blockage 1401 is provided on the outer casing 9.

[0034] To filter the gas entering the filter tank 105 through the intake pipe 103, a filter element 4 is installed in the filter tank 105. Filter media, such as..., is installed inside the housing 401 of the filter element 4. Figure 2 , Figure 3 , Figure 13 As shown, an air inlet 402 and an air outlet 404 are respectively provided at the front and rear ends of the housing 401. The air inlet 402 is a round hole, corresponding to the end position of the air inlet pipe 103, and the air outlet 404 is an array of strip holes. In order to seal the connection between the air inlet pipe 103 and the filter element 4 to prevent air leakage, a first annular groove is opened on the side wall of the filter tank 105. The first annular groove is coaxial with the outlet of the air inlet pipe 103, and a first sealing ring 1031 is installed in the first annular groove. A second annular groove is provided at the air inlet 402 of the housing 401, and the second annular groove is coaxial with the air inlet 402. To ensure a tight seal by compressing the first sealing ring 1031, sliding grooves 108 are formed on both sides of the speed regulating groove 106. The sliding grooves 108 are connected to the filter groove 105 via sliding holes. Sliding clamping components, including a push plate 5 and a synchronization plate 7, are slidably connected within the sliding grooves 108. The push plate 5 slides in contact with the housing 401 of the filter element 4 within the filter groove 105. The synchronization plate 7 is slidably connected within the sliding grooves 108. The push plate 5 and the synchronization plate 7 are connected by a sliding rod 6. A first spring 8 is press-fitted between the rear end face of the synchronization plate 7 and the sliding groove 108. To facilitate the removal of the filter element 4, finger grooves 403 are formed on the top surface of the housing 401.

[0035] The speed regulating groove 106 has longitudinal strip holes on its side wall. The speed regulating groove 106 is connected to the filter groove 105 through the longitudinal strip holes. The upper cover 2 is equipped with a speed regulating valve 3. After the upper cover 2 is installed, the speed regulating valve 3 is inserted into the speed regulating groove 106. The speed regulating groove 106 is connected to the outlet connector 102.

[0036] The working principle of this utility model:

[0037] The inlet connector 101 is connected to the puncture sheath of the laparoscope via a catheter, the outlet connector 102 is connected to the drainage bag via a catheter, and the drain connector 13 is connected to the waste bag via a catheter. During the operation, the exhaust switch on the puncture sheath is opened, and the generated smoke is sent into the laparoscopic surgical smoke filter device through the catheter. After the smoke enters the collection tank 104, if the smoke contains liquid, the liquid will be collected in the collection tank 104. The smoke enters the filter element 4 in the filter tank 105 through the air inlet pipe 103. After the smoke is filtered by the filter material in the filter element 4, it leaves the filter element 4 through the air outlet 404 and enters the speed regulating tank 106. The medical staff adjusts the opening of the speed regulating valve 3 according to the amount of smoke, so that the smoke passes through the speed regulating valve 3 at the desired speed and enters the drainage bag through the catheter. At this time, although the air pressure in the collection tank 104 is high, the liquid level is low. The stop lever 1102 is in contact with the end face of the blockage 1401 of the valve core 14, blocking the valve core 14 and preventing the valve core 14 from opening.

[0038] As the surgery progresses, the liquid level in the collection tank 104 gradually rises. After the liquid surface comes into contact with the float 1802 of the liquid level detector 18, the float 1802 begins to rotate clockwise under the action of buoyancy as the liquid level rises further. This causes the rotating rod 1801 to rotate. The rotating rod 1801, through the transmission of the hexagonal prism 1101, drives the transmission rod 11 to rotate, which in turn causes the stop rod 1102 to rotate. When the stop rod 1102 disengages from the end face of the blockage 1401, under the combined action of air pressure and hydraulic pressure in the collection tank 104, the valve core 14 opens, and the indicator rod 12 extends out of the indicator hole to inform the medical staff to start draining the liquid. The liquid in the collection tank 104 enters the outer shell 9 through the drain port 110 and the extension tube 109, and then is discharged into the waste liquid bag through the drain connector 13 and the conduit. As the liquid level in the collection tank 104 decreases, both the air pressure and hydraulic pressure in the collection tank 104 decrease. When the pressure generated is lower than the elastic force of the second spring 15, the valve core 14 closes, the indicator rod 12 retracts into the indicator hole, and informs the medical staff that the drainage is over. At this time, the liquid level in the collection tank 104 is lower than the lowest point of the float 1802. The stop rod 1102 rotates under the action of gravity and comes into contact with the end face of the valve core 14, thus blocking the movement of the valve core 14 and entering the next cycle.

[0039] After the surgery, disassemble the laparoscopic surgery smoke filter and send it for post-use processing. During post-use processing, manually pull the buckle 201 outward to disengage it from the slot 107, releasing the limit. Open the top cover 2, insert your finger into the finger groove 403 of the filter element 4 and pull the filter element 4 towards the speed adjustment slot 106 to compress the first spring 8, releasing the compressed state of the filter element 4. Remove the filter element 4 and discard it. Remove the connecting bolt 10 and open the outer shell 9. During the opening process, the hexagonal prism 1101 disengages from the sink 1803, and the valve core 14 disengages from the extension tube 109. After removing the outer shell 9, tilt the opening of the outer shell 9 downward, and the valve core 14 and the second spring 15 slide out under gravity. Remove the nut connected to the screw 1703 of the connecting pipe 17, separate the pipe body 1701 from the outer ring plate 16, and remove the connecting pipe 17 along with the liquid level detector 18 from the detection hole to complete the decomposition. Clean and sterilize the decomposed parts (except for the waste filter element 4).

[0040] After cleaning and sterilization, reinstall in the reverse order of disassembly. When installing valve core 14, the handle on transmission rod 11 can be turned to make stop rod 1102 avoid the installation path of valve core 14. When installing housing 9, observe the alignment of hexagonal prism 1101 and sink 1803 through first observation window 901 to ensure that hexagonal prism 1101 can enter sink 1803 more quickly. Observe the sealing of extension tube 109 by valve core 14 through second observation window 902 to ensure the effectiveness of sealing. Replace filter element 4. When installing filter element 4, press the rear end of filter element 4 against push plate 5 and compress first spring 8. Insert filter element 4 into filter tank 105. First spring 8 returns to its original position, so that filter element 4 presses against first sealing ring 1031. Fasten top cover 2. It is ready for next use.

[0041] The mechanical connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It is common knowledge.

[0042] Components not described in detail in this article are existing technologies.

[0043] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laparoscopic surgery smoke filtering device, comprising a main body (1), an inlet joint (101) and an outlet joint (102) are connected on the main body (1), a collection groove (104), a filtering groove (105) and a speed regulating groove (106) are communicated with each other in the main body (1), the inlet joint (101) and the collection groove (104) are communicated with each other, the outlet joint (102) and the speed regulating groove (106) are communicated with each other, a speed regulating valve (3) is arranged in the speed regulating groove (106), a filter core (4) is arranged in the filtering groove (105), an upper cover (2) is connected on the main body (1), characterized in that: The upper cover (2) and the main body (1) are detachably connected, and a sealing ring is arranged at the connecting position; the collecting groove (104) is provided with a liquid discharge mechanism, and the liquid discharge mechanism is provided with a blocking mechanism; the filter core (4) is detachably connected in the filtering groove (105), and the filter core (4) is connected with a pressing mechanism.

2. The laparoscopic surgical smoke evacuation device of claim 1, wherein: The filter core (4) comprises a shell (401), and the shell (401) is provided with filter material; the shell (401) is provided with an air inlet (402) and an air outlet (404) at two ends respectively.

3. The laparoscopic surgical smoke filtering device of claim 2, wherein: The collecting groove (104) and the filtering groove (105) are connected through an air inlet pipe (103), and the air inlet pipe (103) is provided with a first sealing ring (1031) at the rear end; the first sealing ring (1031) is coaxial with the air inlet (402); the pressing mechanism comprises a sliding pressing part; the main body (1) is provided with a sliding groove (108), and the sliding groove (108) is connected with the filtering groove (105); the sliding pressing part is slidably connected in the sliding groove (108); one end of the sliding pressing part is in sliding contact with the rear end of the filter core (4), and the other end is press-fitted with a first spring (8) between the sliding pressing part and the sliding groove (108).

4. The laparoscopic surgical smoke evacuation device according to claim 1, wherein: The liquid discharge mechanism comprises an extension pipe (109), and the collecting groove (104) is provided with a liquid discharge port (110); the liquid discharge port (110) is connected with the extension pipe (109); and the extension pipe (109) is connected with the blocking mechanism.

5. The laparoscopic surgical smoke filtering device according to claim 4, wherein: The blocking mechanism comprises a housing (9) and a liquid level detector (18); the main body (1) is provided with a detection hole; a connecting pipe (17) is detachably connected in the detection hole; the liquid level detector (18) is hingedly connected in the connecting pipe (17); one end of a rotating rod (1801) of the liquid level detector (18) is connected with a float ball (1802) in the main body (1); the housing (9) is detachably connected to the outer wall of the main body (1), and a transmission rod (11) is hingedly connected in the housing (9); the transmission rod (11) is detachably connected in transmission relationship with the rotating rod (1801) at the end; the transmission rod (11) is connected with a blocking rod (1102); an indicating rod (12) is slidably connected to the housing (9); a valve core (14) is connected to the end of the indicating rod (12); the valve core (14) is in sliding contact with the pipe opening of the extension pipe (109), so as to block the extension pipe (109); a second spring (15) is press-fitted between the valve core (14) and the housing (9); the blocking rod (1102) is in sliding contact with the outer end surface of the valve core (14).

6. The laparoscopic surgical smoke evacuation device according to claim 1, wherein: The upper cover (2) and the main body (1) are detachably connected.

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