A device for monitoring gases in a closed chest drainage

Abstract

The application provides a device capable of monitoring gas of a closed thoracic drainage, and belongs to the technical field of thoracic drainage. The device comprises a mounting box, a small air suction pump fixedly installed on the inner side of the mounting box, a gas suction port of the small air suction pump and a gas adjusting assembly connected through a first conduit, an air inlet of the gas adjusting assembly connected with one side of an air outlet of a gas-liquid separation assembly through a second conduit, a one-way drainage assembly fixedly installed on one side of a drainage port of the gas-liquid separation assembly, the one-way drainage assembly connected with a drainage puncture head through a third conduit, and the third conduit penetrating through the mounting box, and one side of an air outlet of the gas adjusting assembly is provided with a gas pressure comparison plate. Through the gas adjusting assembly and the gas pressure comparison plate, in use, the drained gas enters a gas bag, the size of an auxiliary comparison gas bag is compared, the gas pressure comparison plate can quickly monitor the value of the drained gas, the calculation operation time and personnel cost are saved, and doctors can conveniently arrange subsequent treatment schemes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chest drainage, in particular to a device for monitoring gas in closed chest drainage. BACKGROUND

[0002] Closed chest drainage is a method of inserting a drainage tube into the chest cavity, placing the drainage tube below a closed water seal bottle, and draining the gas or liquid in the pleural cavity to the outside of the body to reestablish the negative pressure of the pleural cavity. Due to reasons such as lung resection, trauma, and emphysema, the lung ruptures, and the gas in the lung enters the pleural cavity to form a pneumothorax. If the gas compresses the lung by 30%, chest tightness will occur, and if it exceeds 60%, the respiratory function will be significantly affected. When pneumothorax occurs, the doctor needs to drain the gas in the pleural cavity through chest puncture.

[0003] A closed chest drainage device with publication number (CN112843348A) includes two suction cups, two suction cups are connected with drainage tubes on one side, drainage tubes are connected with conversion heads on one side, and drainage tubes are connected with external drainage frames and fixing members on the outside, respectively. The patent sets up suction cups, drainage tubes, and drainage bags, and places the drainage tube into the human body, then uses two suction cups to fix the drainage tube on the outside of the human body, the liquid to be drained is guided from the drainage tube to the drainage bag, when the patient needs to move to a certain place, the drainage bag is fixed by using the fixing frame, so that the drainage bag will not be inclined or hung down during the walking process of the patient, the speed of drainage is reduced, the portability of the device is effectively improved, the filter screen is arranged on one side of the conversion head, the filter screen can filter blood clots and necrotic substances in the reverse flow valve, the filter screen is taken out from one side of the conversion head and cleaned every period of time, and blood clots and necrotic substances are effectively prevented from blocking the conversion head. However, its structure still needs to be improved, and the specific problems are as follows:

[0004] Since the drainage time often exceeds 24 hours, and during this process, the doctor cannot always accompany the patient to record and observe the capacity of the drained gas and effusion, the patient or other auxiliary personnel often need to observe and record and inform the doctor, important data need to be monitored quickly, and the drained effusion may need to be tested for subsequent treatment of the patient. SUMMARY

[0005] The technical problem to be solved by the present application is that the doctor cannot always accompany the patient to record and observe the capacity of the drained gas and effusion, the patient or other auxiliary personnel often need to observe and record and inform the doctor, important data need to be monitored quickly, and the drained effusion may need to be tested for subsequent treatment of the patient.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] The utility model provides a device that can monitor the gas of thoracic cavity closed drainage, including: the inside fixed mounting of installation box has small -size air pump, small -size air pump and gas collection subassembly's air exhaust mouth are connected through pipe one, the air inlet hole of gas regulation subassembly is connected with the air outlet mouth one side of gas -liquid separation subassembly through pipe two, the drainage mouth one side fixed mounting of gas -liquid separation subassembly has one -way drainage subassembly, one -way drainage subassembly is connected with drainage puncture head through pipe three, and pipe three passes through installation box installation, the air exhaust mouth one side of gas regulation subassembly is provided with gas pressure contrast board, and gas pressure contrast board fixed mounting is in installation box.

[0008] Preferably, the installation box is made of aluminum alloy material, the bottom of the installation box is provided with an open slot, the pipe one, the pipe two and the pipe three are made of medical hose, and the surface of the gas pressure contrast board is etched with a thoracic cavity gas pressure percentage scale line.

[0009] Preferably, the gas regulation subassembly comprises a gas bag one, the inside of the installation box is fixedly installed with the gas bag one, the front end of the gas bag one is fixedly installed with two groups of gas connectors, the left side of the gas bag one is fixedly installed with a connecting rod, the front end of the connecting rod is fixedly installed with a rack, and the rack is engagedly connected to the gas-liquid separation subassembly.

[0010] Preferably, the gas bag one and the gas bag two are connected through a pressure regulating valve, the air inlet side of the gas bag two is slidably installed with a movable plate, the outer side of the movable plate is uniformly installed with a tension spring at equal angles, the other end of the tension spring is fixedly installed on the inner side of the air inlet of the gas bag two, and the inner side of the gas bag two is provided with activated carbon.

[0011] Preferably, the gas bag one, the gas bag two and the gas pressure contrast board are on the same axis, and the tail end exhaust hole of the gas bag two is always provided with an open setting.

[0012] Preferably, the gas-liquid separation subassembly comprises a gas-liquid separation box, the two sides of the gas-liquid separation box are symmetrically installed with sealing rings, a rotating shaft is rotatably installed in the middle of the inner wall of the gas-liquid separation box, a gear is sleeved on the rotating shaft, the gear is engagedly connected with the rack, the rack penetrates through the gas-liquid separation box and is installed, the surface of the rotating shaft is uniformly installed with a liquid leakage plate at equal angles, and the bottom of the gas-liquid separation box is installed with a liquid collection box.

[0013] Preferably, the bottom of the inner wall of the gas-liquid separation box is provided with a liquid discharge hole groove, the liquid leakage plate is provided in a circular arc shape, and the liquid collection box is made of plastic material.

[0014] Preferably, the one-way drainage subassembly comprises a connector, the connector is fixedly installed on the sealing ring of the drainage mouth side of the gas-liquid separation subassembly, and a fixed block is fixedly installed on the inner side of the connector.

[0015] Preferably, the fixed block is nested with a shaft rod, the shaft rod is sleeved with a spring, the front end of the shaft rod is fixedly installed with a contact block, and the inner side of the joint is fixedly installed with a limiting ring close to the drainage port.

[0016] Preferably, the tail of the shaft rod is provided with a limiting block to prevent the shaft rod from sliding out of the fixed block, the contact block and the limiting ring are made of aluminum alloy material, and the inner side of the limiting ring is installed with a sealing rubber ring.

[0017] Compared with the prior art, the present application has at least the following beneficial effects:

[0018] In the above scheme, by arranging the gas adjusting assembly and the air pressure comparison plate, in use, the drained gas enters the air bag one, the size of the auxiliary comparison air bag two is compared, and the air pressure comparison plate can quickly monitor the value of the drained gas, thereby saving the calculation operation time and personnel cost, and facilitating the doctor to reasonably arrange the subsequent treatment scheme.

[0019] By arranging the gas-liquid separation assembly, in use, the pleural effusion is discharged into the liquid collection box below the gas-liquid separation box through gravity, which facilitates subsequent testing of the effusion and greatly improves the work efficiency of the doctor.

[0020] Through cooperation of the gas adjusting assembly and the gas-liquid separation assembly, according to the expansion and contraction of the air bag one when inhaling and expelling gas, the rack drives the gear to rotate, so that the shaft drives the leaching plate, thereby preventing the drained pleural effusion from blocking the gas-liquid separation box. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable a person skilled in the relevant art to implement and use the present disclosure.

[0022] Figure 1 It is a three-dimensional structure schematic view of the device for monitoring the gas of closed drainage of the thoracic cavity.

[0023] Figure 2 It is a three-dimensional structure schematic view of the device for monitoring the gas of closed drainage of the thoracic cavity.

[0024] Figure 3 It is a structure schematic view of the gas adjusting assembly.

[0025] Figure 4 It is a cutaway schematic view of the inner side of the air bag two.

[0026] Figure 5 It is a schematic view of the assembly structure of the gas-liquid separation assembly and the one-way drainage assembly.

[0027] Figure 6Fig. 1 is a schematic view of the positional relationship between the gas regulating assembly and the gas-liquid separation assembly;

[0028] Figure 7 Fig. 4 is a schematic view of the sectional structure of the one-way drainage assembly.

[0029] [Reference signs]

[0030] 1, mounting box; 2, small air pump; 3, conduit I; 4, gas regulating assembly; 41, air bag I; 42, gas joint; 43, connecting rod; 44, rack; 45, pressure regulating valve; 46, air bag II; 47, movable plate; 48, tension spring; 49, activated carbon; 5, conduit II; 6, gas-liquid separation assembly; 61, gas-liquid separation box; 62, sealing ring; 63, rotating shaft; 64, gear; 65, liquid drainage plate; 66, liquid collection box; 7, one-way drainage assembly; 71, joint; 72, fixed block; 73, shaft rod; 74, spring; 75, contact block; 76, limiting ring; 8, conduit III; 9, drainage puncture head; 10, air pressure comparison plate.

[0031] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs, and the adjustment or modification still includes in the scope of the appended claims. DETAILED DESCRIPTION

[0032] The device for monitoring the gas of closed thoracic drainage provided by the present application is described in detail below in combination with the drawings and specific embodiments. It is explained here that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be adopted by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0033] It should be noted that, in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0034] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0035] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0036] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a device for monitoring closed thoracic drainage gas, comprising: a mounting box 1, a small suction pump 2 fixedly mounted inside the mounting box 1, the small suction pump 2 and the suction port of the gas regulating component 4 being connected through a first conduit 3, the air inlet of the gas regulating component 4 being connected through a second conduit 5 to one side of the air outlet of the gas-liquid separation component 6, a one-way drainage component 7 fixedly mounted on one side of the drainage port of the gas-liquid separation component 6, the one-way drainage component 7 being connected through a third conduit 8 to the drainage puncture head 9, and the third conduit 8 being installed through the mounting box 1, and a pressure comparison plate 10 being provided on one side of the exhaust port of the gas regulating component 4, and the pressure comparison plate 10 being fixedly mounted on the mounting box 1.

[0038] Start small air pump 2, through the conduit 3 extraction of gas in the gas regulating assembly 4 gas to produce negative pressure, thereby through the drainage puncture head 9 and conduit three 8 will be drained out of the chest gas-liquid mixture, through the one-way drainage assembly 7 to the gas-liquid separation assembly 6 to separate gas-liquid after, the gas through the conduit two 5 into the gas regulating assembly 4, through the gas pressure comparison plate 10 scale line contrast reading chest pressure size, and according to the pre-set gas regulating assembly 4 maximum gas pressure threshold, filtered exhaust pressure, gas-liquid separation assembly 6 separated from the chest liquid, facilitate the subsequent detection of doctors.

[0039] In this embodiment, the installation box 1 uses aluminum alloy material, installation box 1 bottom is provided with opening groove, convenient conduit 3, conduit two 5 and conduit three 8 using medical hose, gas pressure comparison plate 10 surface etching of chest gas pressure percentage scale line, through the use of aluminum alloy material installation box 1, reduce the weight of the device, improve the device portability, through the installation box 1 bottom is provided with opening groove, convenient gas-liquid separation assembly 6 liquid collection box 66 of taking, through the gas pressure comparison plate 10 surface etching gas pressure percentage scale line convenient personnel to view the exclusion of gas pressure.

[0040] As shown in Figures 2-4 and Figure 6 The gas regulating assembly 4 includes air bag 41, installation box 1 inside fixed installation has air bag 41, air bag 41 front end fixed installation has two groups of gas joint 42, air bag 41 left side fixed installation has connecting rod 43, connecting rod 43 front end fixed installation has rack 44, rack 44 meshing connection in gas-liquid separation assembly 6, adjust the maximum gas pressure threshold of the preset pressure regulating valve 45, initial state, air bag 41 and air bag 46 size is the same, small air pump 2 start, through the conduit 3 extraction of gas in the air bag 41, make air bag 41 and the negative pressure generated by the connection of conduit two 5 one end, according to the principle of pressure, thereby through the drainage puncture head 9 and conduit three 8 will be drained out of the chest gas-liquid mixture, through the one-way drainage assembly 7 to the gas-liquid separation assembly 6 to separate gas-liquid after, the gas through the conduit two 5 into the air bag 41, air bag 41 axial expansion, so that the front end of the connecting rod 43 rack 44 along the outer diameter direction of air bag 41 horizontal movement, through the meshing connection with gas-liquid separation assembly 6, drive gas-liquid separation assembly 6 rotation, prevent clogging, by observing whether there is liquid in conduit three 8 and gas-liquid separation assembly 6, close small air pump 2.

[0041] In the embodiment, the air bag one 41 and the air bag two 46 are connected through the pressure regulating valve 45, the air inlet side of the air bag two 46 is slidingly installed with the movable plate 47, the outer side of the movable plate 47 is uniformly installed with the tension spring 48 at equal angles, and the other end of the tension spring 48 is fixedly installed in the inner side of the air inlet of the air bag two 46, the inner side of the air bag two 46 is provided with the activated carbon 49, when the internal air pressure of the air bag one 41 exceeds the maximum air pressure threshold value set by the pressure regulating valve 45, the gas passes through the pressure regulating valve 45, the movable plate 47 is opened, the tension spring 48 is stretched under stress, the gas enters into the air bag two 46, and is discharged from the air outlet of the air bag two 46 through the activated carbon 49, then the air bag one 41 starts to shrink due to the decrease of the air pressure, the inner side of the air bag two 46 drives the movable plate 47 to return to the end of the air bag two 46 through the tension spring 48, so that the rack 44 moves horizontally along the axis of the air bag one 41, and drives the air-liquid separation assembly 6 to rotate.

[0042] In the embodiment, the air bag one 41, the air bag two 46 and the air pressure comparison plate 10 are on the same axis, the tail end exhaust hole of the air bag two 46 is always open, which is convenient for personnel to observe and estimate the air pressure in the chest cavity, improves the exhaust efficiency after filtration through the tail end open exhaust hole of the air bag two 46, and makes the air bag two 46 in the initial state as a control group of the air bag one 41, which is convenient for observation.

[0043] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 6 , the air-liquid separation assembly 6 comprises an air-liquid separation box 61, the two sides of the air-liquid separation box 61 are symmetrically installed with sealing rings 62, a rotating shaft 63 is rotatably installed in the middle of the inner wall of the air-liquid separation box 61, a gear 64 is sleeved on the rotating shaft 63, the gear 64 is meshingly connected with the rack 44, the rack 44 penetrates through the air-liquid separation box 61 and is installed, the surface of the rotating shaft 63 is uniformly installed with liquid drainage plates 65 at equal angles, and a liquid collection box 66 is installed at the bottom of the air-liquid separation box 61. The gas-liquid mixture passes through the catheter three 8 through the drainage puncture head 9, enters into the air-liquid separation box 61 through the one-way drainage assembly 7, and passes through the surface of the liquid drainage plate 65. Because the temperature is lower than that in the human chest cavity, the gas-liquid mixture is converted into water droplets, falls into the liquid collection box 66 together with the drained liquid, and the gas enters into the air bag one 41 through the catheter two 5, the air bag one 41 starts to expand, the rack 44 at the front end of the connecting rod 43 moves horizontally along the outer diameter direction of the air bag one 41, the rack 44 drives the gear 64 to rotate clockwise, so that the rotating shaft 63 drives the liquid drainage plate 65 to rotate clockwise, preventing the thick liquid in the air-liquid separation box 61 from being blocked, when the air bag one 41 starts to shrink due to the decrease of the air pressure, the inner side of the air bag two 46 drives the movable plate 47 to return to the end of the air bag two 46 through the tension spring 48, so that the rack 44 moves horizontally along the axis of the air bag one 41, and drives the gear 64 to rotate counterclockwise, so that the rotating shaft 63 drives the liquid drainage plate 65 to rotate counterclockwise.

[0044] In the embodiment, the bottom of the inner wall of the gas-liquid separation box 61 is provided with a liquid discharge hole groove, the liquid leakage plate 65 is provided in a circular arc shape, and the liquid collection box 66 is made of plastic material.

[0045] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 7 , the one-way drainage assembly 7 includes a connector 71, the connector 71 is fixedly installed on the sealing ring 62 on one side of the drainage port of the gas-liquid separation assembly 6, and a fixed block 72 is fixedly installed on the inner side of the connector 71. By arranging the sealing ring 62 between the gas-liquid separation assembly 6 and the connector 71, the sealing property of the drainage end of the device is ensured, and the reliability of the device is improved.

[0046] In the embodiment, the fixed block 72 is nested with a shaft rod 73, the shaft rod 73 is sleeved with a spring 74, the front end of the shaft rod 73 is fixedly installed with a contact block 75, and a limiting ring 76 is fixedly installed on the inner side of the connector 71 close to the drainage port side. When negative pressure is generated, the shaft rod 73 drives the contact block 75 to move towards the fixed block 72, the fixed block 72 compresses the spring 74, the passage between the contact block 75 and the limiting ring 76 is opened, and the drainage material in the thoracic cavity enters the gas-liquid separation box 61 through the passage. In the same process, the drainage material extrudes the contact block 75 to compress the spring 74 all the time. When the drainage is completed, the spring 74 returns to the original state, thereby pushing the contact block 75 to contact the limiting ring 76, the passage is closed, and the liquid or gas cannot flow back from the inner side of the limiting ring 76 to the outer side of the connector 71 to the catheter three 8, thereby avoiding the liquid or gas flowing back to the thoracic cavity of the patient, causing the symptoms of thoracic cavity infection or alveolar secondary collapse of the patient.

[0047] In the embodiment, the tail part of the shaft rod 73 is provided with a limiting block to prevent the shaft rod 73 from sliding out of the fixed block 72, the contact block 75 and the limiting ring 76 are made of aluminum alloy material, and a sealing rubber ring is installed on the inner side of the limiting ring 76. By limiting the length of the shaft rod 73, the stability of the device is improved, by using the contact block 75 and the limiting ring 76 made of aluminum alloy material, the surface wear resistance and service life of the device are improved, and by installing the sealing rubber ring on the contact surface on the inner side of the limiting ring 76, the safety and stability of the device are improved.

[0048] The technical scheme provided by the application is provided with a gas adjusting assembly and a gas pressure comparison plate. In use, the drained gas enters the gas bag one, the size of the auxiliary comparison gas bag two is compared, the gas pressure comparison plate can quickly monitor the value of the drained gas, the calculation operation time and personnel cost are saved, and the doctor can conveniently and reasonably arrange the subsequent treatment scheme.

[0049] By setting the gas-liquid separation assembly, in use, the pleural effusion is discharged into the liquid collection box below the gas-liquid separation box by gravity, facilitating subsequent test of the effusion, and greatly improving the work efficiency of doctors.

[0050] By cooperation of the gas adjusting assembly and the gas-liquid separation assembly, according to the expansion and contraction of the air bag when inhaling and expelling gas, the rack drives the gear to rotate, so that the rotating shaft drives the drip plate, preventing the pleural effusion from blocking the gas-liquid separation box.

[0051] The present application encompasses any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details for those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0052] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment methods can be completed by programs instructing related hardware, and the programs can be stored in computer readable storage medium, such as ROM / RAM, magnetic disc, optical disc, etc.

[0053] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A device for monitoring closed thoracic drainage gas, characterized in that, include: The mounting box has a small suction pump fixedly installed inside. The small suction pump and the suction port of the gas regulating component are connected through a conduit one. The air inlet of the gas regulating component is connected to the air outlet of the gas-liquid separation component through a conduit two. A one-way drainage component is fixedly installed on the drainage port side of the gas-liquid separation component. The one-way drainage component is connected to the drainage puncture head through a conduit three, and the conduit three penetrates the mounting box. A pressure comparison plate is provided on the exhaust port side of the gas regulating component, and the pressure comparison plate is fixedly installed on the mounting box. The gas regulating component includes an airbag, which is fixedly installed inside the mounting box. Two sets of gas connectors are fixedly installed at the front end of the airbag. A connecting rod is fixedly installed on the left side of the airbag, and a rack is fixedly installed at the front end of the connecting rod. The rack is engaged with the gas-liquid separation component. Airbag 1 and Airbag 2 are connected by a pressure regulating valve. A movable plate is slidably installed on one side of the air inlet of Airbag 2. Tension springs are evenly distributed at equal angles on the outer side of the movable plate, and the other end of the tension springs is fixedly installed on the inner side of the air inlet of Airbag 2. By setting up a gas regulating component and a pressure comparison plate, during use, the drained gas enters Airbag 1. By comparing the size of Airbag 2, the amount of drained gas can be quickly monitored through the pressure comparison plate. The gas-liquid separation assembly includes a gas-liquid separation box with symmetrical sealing rings on both sides. A rotating shaft is rotatably mounted in the middle of the inner wall of the gas-liquid separation box, and a gear is sleeved on the rotating shaft. The gear and rack are meshed and connected, and the rack is installed through the gas-liquid separation box. Drainage plates are evenly distributed at equal angles on the surface of the rotating shaft, and a liquid collection box is installed at the bottom of the gas-liquid separation box. According to the expansion and contraction of the airbag when it inhales and exhales gas, the rack drives the gear to rotate, thereby causing the rotating shaft to drive the drainage plates to prevent the drained pleural effusion from blocking the gas-liquid separation box.

2. The device for monitoring closed thoracic drainage gas according to claim 1, characterized in that, The mounting box is made of aluminum alloy and has an opening groove at the bottom. The first, second, and third catheters are made of medical tubing. The surface of the pressure comparison plate is etched with a pleural pressure percentage scale.

3. The device for monitoring closed thoracic drainage gas according to claim 1, characterized in that, Activated carbon is provided on the inner side of the second airbag.

4. The device for monitoring closed thoracic drainage gas according to claim 3, characterized in that, The airbag one, airbag two, and air pressure comparison plate are on the same axis, and the exhaust port at the tail end of the airbag two is always open.

5. The device for monitoring closed thoracic drainage gas according to claim 4, characterized in that, The bottom of the inner wall of the gas-liquid separation box is provided with a drain hole groove, the drain plate is arc-shaped, and the liquid collection box is made of plastic material.

6. The device for monitoring closed thoracic drainage gas according to claim 1, characterized in that, The unidirectional drainage assembly includes a connector. The connector is fixedly installed on the sealing ring on one side of the drainage port of the gas-liquid separation assembly, and a fixing block is fixedly installed on the inner side of the connector.

7. The device for monitoring closed thoracic drainage gas according to claim 6, characterized in that, A shaft is nested on the fixing block, a spring is sleeved on the shaft, a contact block is fixedly installed at the front end of the shaft, and a limit ring is fixedly installed on the inner side of the connector near the drainage port.

8. The device for monitoring closed thoracic drainage gas according to claim 7, characterized in that, A limit block is provided at the tail of the shaft to prevent the shaft from sliding out of the fixing block. The contact block and the limit ring are made of aluminum alloy, and a sealing ring is installed on the inner side of the limit ring.

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