A chest negative pressure drainage device with flow monitoring function

Abstract

The application discloses a thoracic cavity negative pressure drainage device with a flow monitoring function, and relates to the field of thoracic cavity negative pressure drainage devices.The thoracic cavity negative pressure drainage device comprises a drainage box, a gas extraction assembly is arranged in the drainage box, a transparent monitoring boss is arranged on the side of a liquid storage box, an insertion port is arranged on the side of the drainage box for the insertion of the monitoring boss, monitoring assemblies are arranged on both sides of the insertion port and face the monitoring boss, and the top end of the liquid storage box is connected to the gas extraction assembly in the drainage box through a hose.The liquid storage box and the drainage box are designed in a split type, a vertical monitoring boss is arranged on the liquid storage box, the light transmittance at the position of the monitoring boss after liquid enters the liquid storage box is monitored in real time by using photoelectric induction technology, the liquid level height and other information are accurately captured, the pollution and error risks caused by the direct contact between the sensor and the drainage liquid are avoided, and the split type structure design facilitates the separate cleaning or replacement of the liquid storage box, and effectively improves the reusability and maintenance convenience of the device.

Description

Technical Field

[0001] This invention relates to the field of thoracic negative pressure drainage devices, specifically a thoracic negative pressure drainage device with flow monitoring function. Background Technology

[0002] Negative pressure pleural drainage is mainly used to drain blood or other fluids (such as exudate or pus) from the pleural cavity and to monitor the flow rate of the drained fluid. Negative pressure pleural drainage has become a standard method for treating pneumothorax, hemothorax, empyema, pleural effusion, and after thoracotomy.

[0003] Existing thoracic drainage technology generally utilizes capacitive level sensors to detect the volume of liquid in a fluid collection container. The specific installation method and detection principle are as follows: it has at least two electrodes, which are spaced apart from each other and extend along the same section, such that the first electrode of the at least two electrodes is constructed as a single piece, and at least one of the second electrodes is constructed as a segment. The single-piece first electrode is configured as a transmitting electrode, and the segmented second electrode is configured as a receiving electrode. An excitation signal generated by a modulator can be applied to the single-piece first electrode.

[0004] Regarding the aforementioned technologies, existing fluid collection containers for thoracic drainage require directly collecting the drained fluid into a container equipped with sensors, allowing the sensors to directly contact the fluid in order to determine the fluid level and indirectly calculate the flow rate of the drained fluid. However, this method is prone to measurement errors due to liquid adhesion, air bubble interference, or electrode contamination. Furthermore, the sensors need to be thoroughly cleaned and calibrated after each use, increasing operational complexity and the risk of cross-infection.

[0005] In summary, existing negative pressure pleural drainage devices still have significant shortcomings in terms of the accuracy, stability, and ease of use of flow monitoring, making it difficult to meet the clinical needs for real-time and accurate monitoring. Summary of the Invention

[0006] Based on this, the purpose of this invention is to provide a thoracic negative pressure drainage device with flow monitoring function, so as to solve the technical problem that existing thoracic negative pressure drainage devices still have obvious deficiencies in terms of the accuracy, stability and ease of use of flow monitoring.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pleural negative pressure drainage device with flow monitoring function, comprising a drainage box, an air suction component installed inside the drainage box, and a liquid storage box, wherein a transparent monitoring protrusion is provided on the side of the liquid storage box, and an insertion port for inserting the monitoring protrusion is provided on the side of the drainage box, and monitoring components facing the monitoring protrusion are provided on both sides inside the insertion port, wherein the top of the liquid storage box is connected to the air suction component inside the drainage box through a flexible tube.

[0008] By adopting the above technical solution, a separate liquid storage box and drainage box are designed. A vertical monitoring protrusion is set on the liquid storage box. Photoelectric sensing technology is used to monitor the change in light transmittance at the monitoring protrusion position after the liquid enters the liquid storage box in real time, thereby accurately capturing information such as liquid level height. This avoids the risk of contamination and error caused by direct contact between the sensor and the drainage liquid. In addition, the separate structure design makes it easy to clean or replace the liquid storage box separately, effectively improving the reusability and maintenance convenience of the device.

[0009] The invention is further configured such that the bottom surface of the liquid storage box is provided with a sliding groove, the drainage box is provided with a sliding rail for cooperating with the sliding groove, the drainage box is provided with a lifting groove parallel to the sliding rail, and a lifting plate is slidably connected in the vertical direction within the lifting groove. A compression spring is provided between the bottom surface of the lifting plate and the lifting groove. When the top surface of the lifting plate is close to the bottom surface of the liquid storage box, a baffle fixedly connected to one end of the lifting plate can prevent the liquid storage box from separating from the drainage box.

[0010] Preferably, the combination of the liquid storage box and the drainage box is quickly achieved by using the cooperation of the slide rail and the slide groove.

[0011] The invention is further configured such that two parallel lifting rods are fixedly connected to the other end of the lifting plate. The lifting rods are vertically arranged and horizontally slidably connected to sliding columns at intervals along their length. The inner wall of the drainage box is provided with fixing plates on both sides of the insertion port. The fixing plates on both sides of the insertion port are slidably connected to a first monitoring plate and a second monitoring plate, which are parallel to each other. The two lifting rods are respectively located between the first monitoring plate and the corresponding fixing plate, and between the second monitoring plate and the corresponding fixing plate. The fixing plates are provided with inclined platforms that cooperate with the sliding columns facing the lifting rods. When the liquid storage box is installed in the drainage box, the sliding column contacts the top of the inclined platform, and the first monitoring plate and the second monitoring plate are in close contact with the monitoring protrusion.

[0012] Preferably, the first and second monitoring plates are brought into close contact with the monitoring boss while the lifting plate is being reset.

[0013] The invention is further configured such that the top surface of the lifting plate is provided with a receiving groove parallel to the slide rail, and a insert is inserted into the receiving groove. When the insert is inserted into the receiving groove, its top surface is flush with the top surface of the lifting plate. A guide slot is also provided in the middle of the receiving groove along the length direction. The width of the guide slot is the same as the thickness of the insert. When the insert is inserted into the guide slot, the top of the baffle is lower than the bottom surface of the liquid storage box.

[0014] Preferably, the use of insert plates allows the lifting plate to descend smoothly, effectively preventing one end of the lifting plate from tilting up when it descends.

[0015] The present invention is further configured such that a monitoring tube is provided on one side of the monitoring protrusion of the liquid storage box, the monitoring tube is U-shaped and the inlet and outlet are both located at the upper part of the liquid storage box, a light-blocking plate is provided in the drainage box facing the monitoring tube to separate the parallel parts of the monitoring tube, a light strip is provided in the light-blocking plate facing the liquid storage box in the vertical direction, and a light sensing component is provided in the drainage box corresponding to the monitoring tubes on both sides of the light-blocking plate, and a camera is installed in the direction of the monitoring tube.

[0016] Preferably, a camera is used to record the state changes of the drainage fluid.

[0017] The present invention is further configured such that one end of the top of the monitoring tube is provided with a liquid extraction interface, and the other end extends into the liquid storage box.

[0018] Preferably, a drainage tube is connected using a liquid extraction interface.

[0019] The present invention is further configured such that the top of the drainage box is provided with a connecting pipe groove facing the liquid storage box, and a first air interface is installed in the connecting pipe groove. The first air interface is connected to an air extraction component located inside the drainage box, and the liquid storage box is provided with a second air interface facing the connecting pipe groove.

[0020] Preferably, a hose is used to connect the second air port and the first air port respectively.

[0021] The present invention is further configured such that an inclined liquid guiding slope is provided inside the liquid storage box, the top of the liquid guiding slope corresponds to the drain port of the monitoring tube, and the bottom extends to the bottom of the liquid storage box.

[0022] Preferably, the liquid entering the storage box can flow down slowly to reduce fluctuations in the liquid level inside the storage box.

[0023] The present invention is further configured such that a touch screen is rotatably connected to the top surface of the drainage box, and a groove for accommodating the touch screen is provided on the top surface.

[0024] Preferably, the working status of the air intake component inside the drainage box is controlled by a touch screen.

[0025] The present invention is further configured such that a light-shielding sheet is provided in the liquid storage box near the monitoring tube.

[0026] Preferably, the light-shielding sheet can prevent the color of the liquid inside the transparent reservoir from interfering with the light sensing component.

[0027] In summary, the present invention has the following main beneficial effects:

[0028] This invention designs a separate liquid storage box and a drainage box. A vertical monitoring protrusion is set on the liquid storage box. After assembling the drainage box and the liquid storage box, the monitoring protrusion is inserted into the drainage box and located between the monitoring components inside the drainage box. Photoelectric sensing technology is used to monitor the change in light transmittance at the monitoring protrusion position in real time after the liquid enters the liquid storage box, thereby accurately capturing information such as liquid level. This avoids the risk of contamination and error caused by direct contact between the sensor and the drainage liquid. Furthermore, the separate structure design makes it easy to clean or replace the liquid storage box separately, effectively improving the reusability and maintenance convenience of the device.

[0029] This invention uses a bent monitoring tube on a fluid storage box and a light-blocking plate on a drainage box to separate the parallel parts of the monitoring tubes. Under the illumination of a light strip, a photosensitive component and a camera are used to determine whether the color of the liquid flowing through the monitoring tubes is the same. This allows for accurate recording when the color of the drainage liquid changes, providing timely early warning of changes in the patient's condition for clinical use.

[0030] This invention utilizes a lifting plate within the drainage box, with a stop at the end of the lifting plate to limit the movement of the storage box, ensuring a stable connection between the drainage box and the storage box. Simultaneously, after the monitoring protrusion of the storage box enters the insertion port of the drainage box, the lifting plate resets, causing the monitoring component to adhere tightly to the monitoring protrusion, reducing the gap between them and thus improving the sensitivity and accuracy of photoelectric monitoring, ensuring stable acquisition of liquid level change signals. When the storage box needs to leave the drainage box, the lifting plate lowers its height, allowing the monitoring component to move away from the monitoring protrusion, preventing mutual friction and structural wear, and extending the equipment's service life.

[0031] This invention utilizes an inclined liquid-guiding slope within the liquid storage box. This allows the liquid introduced into the storage box by the monitoring tube to flow slowly down the slope, effectively preventing the liquid from directly impacting the bottom of the storage box and causing splashing or bubbles. This reduces the interference of liquid surface fluctuations on monitoring accuracy. Furthermore, the surface of the liquid-guiding slope is coated with a hydrophobic coating, which further promotes the rapid spread of the liquid and its flow to lower areas, maintaining the clarity and stability of the monitoring area and providing a continuous and reliable monitoring environment for the photoelectric sensing system. Attached Figure Description

[0032] Figure 1 This is a perspective view of the present invention;

[0033] Figure 2This is a perspective view of the unfolded state of the touch screen of the present invention;

[0034] Figure 3 This is a perspective view of the side panel of the present invention in the removed state;

[0035] Figure 4 This is a perspective view of the liquid storage box and drainage box of the present invention in a disassembled state;

[0036] Figure 5 This is a perspective view of the liquid storage box and drainage box in their disassembled state, representing another aspect of the present invention.

[0037] Figure 6 A perspective view of the state where the lifting plate of the present invention is lowered and the liquid storage box can be separated from the drainage box;

[0038] Figure 7 For the present invention Figure 6 Enlarged view of A in the middle;

[0039] Figure 8 A perspective view of the liquid storage box and the drainage box in the present invention, with the lifting plate not lowered.

[0040] Figure 9 For the present invention Figure 8 Enlarged view of B in the middle;

[0041] Figure 10 This is a plan view of the internal structure of the drainage box before the lifting plate of the present invention is lowered;

[0042] Figure 11 For the present invention Figure 10 Enlarged view of C in the middle;

[0043] Figure 12 A perspective view of the drainage box structure when the lifting plate of the present invention is not lowered;

[0044] Figure 13 This is a plan view of the internal structure of the drainage box after the lifting plate of the present invention is lowered;

[0045] Figure 14 For the present invention Figure 13 Enlarged view of D;

[0046] Figure 15 This is a perspective view of the drainage box structure after the lifting plate of the present invention is lowered.

[0047] Figure 16 This is a perspective view of the liquid storage box of the present invention;

[0048] Figure 17 This is a perspective view of the internal structure of the liquid storage box of the present invention;

[0049] Figure 18 This is a perspective view of the internal structure of the liquid storage box from another angle according to the present invention;

[0050] Figure 19 This is a perspective view of the lifting plate of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Drainage box; 101. Slide rail; 102. Lifting groove; 103. Insertion port; 104. Connecting pipe groove; 105. First gas interface; 106. Touch screen; 107. Side plate; 2. Liquid storage box; 201. Monitoring boss; 202. Monitoring tube; 203. Box cover; 204. Liquid extraction interface; 205. Second gas interface; 206. Liquid guiding slope; 207. Slide groove; 208. Light shield; 3. Lifting plate; 301. Baffle; 302. Guide column; 303. Receiving groove; 304. Guide slot; 305. Lifting rod; 4. Compression spring; 5. First monitoring plate; 6. Second monitoring plate; 7. Fixing plate; 701. Inclined platform; 702. Guide rod; 8. Sliding column; 9. Insert plate; 10. Light shield; 11. Light strip; 12. Light sensing component; 13. Camera. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0054] The embodiments of the present invention will now be described. Example 1

[0055] Please refer to a negative pressure pleural drainage device with flow monitoring function. Figure 1-19 The system includes a drainage box 1, which contains an air extraction assembly. Specifically, in this embodiment, the air extraction assembly is a vacuum pump, which is installed inside the drainage box 1. The air inlet of the vacuum pump is connected to the first air interface 105. A side plate 107 is slidably connected to the side of the drainage box 1. The drainage box 1 can be easily opened by sliding out the side plate 107 to inspect the internal components. In order to prevent the side plate 107 from sliding arbitrarily, in this embodiment, the side plate 107 is fixed to the drainage box 1 with a hand-tightened screw, which facilitates the installation and removal of the side plate 107.

[0056] Furthermore, the top of the drainage box 1 is provided with a connecting pipe groove 104 facing the liquid storage box 2, and a first air interface 105 is installed in the connecting pipe groove 104. The first air interface 105 is connected to the air extraction component located inside the drainage box 1. The liquid storage box 2 is provided with a second air interface 205 facing the connecting pipe groove 104. The second air interface 205 and the first air interface 105 are connected by hoses respectively, thereby realizing the removal of air from the liquid storage box 2. Since the first air interface 105 and the second air interface 205 are both located in the connecting pipe groove 104 when the liquid storage box 2 is installed in the drainage box 1, the first air interface 105 and the second air interface 205 can also be well protected to avoid impact damage or hose detachment.

[0057] It also includes a liquid storage box 2, on the side of which a transparent monitoring protrusion 201 is provided. The monitoring protrusion 201 is vertically arranged. The side of the drainage box 1 is provided with an insertion port 103 for the monitoring protrusion 201 to be inserted. Monitoring components facing the monitoring protrusion 201 are provided on both sides inside the insertion port 103. The top of the liquid storage box 2 is connected to the air extraction component inside the drainage box 1 through a hose.

[0058] For details regarding the above embodiments, please refer to [link / reference]. Figure 6-9 The bottom surface of the liquid storage box 2 is provided with a sliding groove 207, and the drainage box 1 is provided with a slide rail 101 for cooperating with the sliding groove 207. The drainage box 1 is provided with a lifting groove 102 parallel to the slide rail 101, and the lifting plate 3 is slidably connected in the vertical direction in the lifting groove 102. Specifically, the bottom surface of the lifting plate 3 is fixedly connected with a guide post 302 along the length direction. The guide post 302 penetrates the lifting groove 102 vertically downward. The guide post 302 plays a certain guiding role in the up and down sliding of the lifting plate 3, and prevents the lifting plate 3 from shifting laterally.

[0059] Furthermore, a compression spring 4 is provided between the bottom surface of the lifting plate 3 and the lifting groove 102. When the top surface of the lifting plate 3 is close to the bottom surface of the liquid storage box 2, the baffle 301 fixedly connected to one end of the lifting plate 3 can prevent the liquid storage box 2 from separating from the drainage box 1. The combination connection between the liquid storage box 2 and the drainage box 1 can be quickly achieved by the cooperation of the slide rail 101 and the slide groove 207.

[0060] For details regarding the above embodiments, please refer to [link / reference]. Figure 6-15 , Figure 19 Two parallel lifting rods 305 are fixedly connected to the other end of the lifting plate 3. The lifting rods 305 are vertically arranged and are horizontally slidably connected to sliding columns 8 at intervals along their own length. The inner wall of the drainage box 1 is provided with fixing plates 7 on both sides of the insertion port 103. The fixing plates 7 on both sides of the insertion port 103 are slidably connected to a first monitoring plate 5 and a second monitoring plate 6 that are parallel to each other. Specifically, the top and bottom ends of the fixing plates 7 are fixedly connected to guide rods 702. The first monitoring plate 5 and the second monitoring plate 6 are slidably connected to the guide rods 702.

[0061] Furthermore, the two lifting rods 305 are respectively located between the first monitoring plate 5 and the corresponding fixing plate 7, and between the second monitoring plate 6 and the corresponding fixing plate 7. The fixing plate 7 is provided with a ramp 701 that cooperates with the sliding column 8 facing the lifting rod 305. The ramp 701 is set with its ramp facing downward. When the liquid storage box 2 is installed in the drainage box 1, the top of the sliding column 8 contacts the top of the ramp 701, and the first monitoring plate 5 and the second monitoring plate 6 are in close contact with the monitoring protrusion 201. When the lifting plate 3 is reset, the first monitoring plate 5 and the second monitoring plate 6 are in close contact with the monitoring protrusion 201.

[0062] Specifically, in this embodiment, the first monitoring plate 5 and the second monitoring plate 6 are a light emitting plate and a light receiving plate, respectively. The main function of the light emitting plate is to emit a single wavelength light source or multiple wavelength light sources, and the main function of the light receiving plate is to receive the light signal emitted by the light emitting plate and penetrate the monitoring protrusion 201. When the liquid level in the liquid storage box changes, causing the degree of refraction or obstruction of the light signal by the monitoring protrusion to change, the light intensity received by the light receiving plate changes accordingly. Thus, the liquid storage status can be determined in real time. Through continuous feedback of the light signal, the system can accurately capture liquid level fluctuations and achieve non-contact monitoring, which not only improves the detection stability but also avoids the wear and error caused by traditional mechanical sensing, making the entire drainage process safer and more reliable.

[0063] For details regarding the above embodiments, please refer to [link / reference]. Figure 1-2 , Figure 16-18 The liquid storage box 2 has a monitoring tube 202 on one side of the monitoring boss 201. One end of the top of the monitoring tube 202 is provided with a liquid extraction interface 204, and the other end extends into the liquid storage box 2. The drainage tube is connected through the liquid extraction interface 204. Example 2

[0064] Please refer to a negative pressure pleural drainage device with flow monitoring function. Figure 1-19 Based on the first embodiment, the difference from the first embodiment is that the monitoring tube 202 is U-shaped and both the inlet and outlet are located at the top of the liquid storage box 2.

[0065] Furthermore, the drainage box 1 is provided with a light-blocking plate 10 to separate the parallel parts of the monitoring tubes 202 facing the monitoring tubes 202. The light-blocking plate 10 is provided with a light strip 11 facing the liquid storage box 2 in the vertical direction. The drainage box 1 is provided with a light sensing component 12 corresponding to the monitoring tubes 202 on both sides of the light-blocking plate 10, and a camera 13 is installed facing the monitoring tubes 202 to record the state changes of the drainage liquid.

[0066] Specifically, the light strip 11 emits stable light. When the light shines on the U-shaped bend in the monitoring tube 202, it can illuminate the liquid inside the monitoring tube 202. When the liquid inside the monitoring tube 202 changes from transparent to turbid or contains blood or purulent components, the photosensitive component 12 will detect the change in light intensity difference on both sides of the light-blocking plate 10, and start the real-time image captured by the camera 13 for comparison and analysis, thereby determining whether the nature of the drainage fluid is abnormal.

[0067] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 The top surface of the drainage box 1 is rotatably connected to a touch screen 106, and a groove is provided on the top surface to accommodate the touch screen 106. The touch screen 106 is used to control the working state of the air intake component inside the drainage box 1. The groove to accommodate the touch screen 106 can effectively protect the touch screen 106 when it is not in use. Example 3

[0068] Please refer to a negative pressure pleural drainage device with flow monitoring function. Figure 1-19 Based on the second embodiment, the difference from the second embodiment is that the top surface of the lifting plate 3 is provided with a receiving groove 303 parallel to the slide rail 101. A insert 9 is inserted into the receiving groove 303. When the insert 9 is inserted into the receiving groove 303, its top surface is flush with the top surface of the lifting plate 3. Specifically, the insert 9 is used to push the lifting plate 3 down evenly to prevent one end of the lifting plate 3 from tilting up.

[0069] Furthermore, a guide slot 304 is provided along the length direction at the middle position of the receiving groove 303. The width of the guide slot 304 is the same as the thickness of the insert 9. When the insert 9 is inserted into the guide slot 304, the top of the baffle 301 is lower than the bottom surface of the liquid storage box 2. Using the insert 9 can make the lifting plate 3 descend smoothly, effectively preventing one end of the lifting plate 3 from tilting up when it descends. Specifically, the end of the insert 9 is provided with a chamfer, which makes it easier for the insert 9 to be better inserted between the bottom surface of the liquid storage box 2 and the guide slot 304. In this embodiment, when the insert 9 is inserted into the guide slot 304 and continues to be inserted inward, the top of the baffle 301 can be lower than the bottom surface of the liquid storage box 2. At the same time, the first monitoring piece 5 and the second monitoring piece 6 are separated from the monitoring protrusion 201 to avoid friction between the first monitoring piece 5 and the second monitoring piece 6 and the monitoring protrusion 201.

[0070] For details regarding the above embodiments, please refer to [link / reference]. Figure 16-18 The liquid storage box 2 is equipped with an inclined liquid-guiding slope 206. The top of the liquid-guiding slope 206 corresponds to the drain port of the monitoring tube 202, and the bottom extends to the bottom of the liquid storage box 2, allowing the liquid entering the liquid storage box 2 to flow down slowly, reducing fluctuations in the liquid level inside the liquid storage box 2. The surface of the liquid-guiding slope 206 is smooth, further reducing the resistance to liquid flow, and the inclined structure can effectively prevent air bubbles from accumulating and avoid interfering with the monitoring results.

[0071] Furthermore, a light-shielding plate 208 is provided in the liquid storage box 2 near the monitoring tube 202. The light-shielding plate 208 can prevent the color of the liquid inside the transparent liquid storage box 2 from interfering with the light sensing component 12.

[0072] In practical operation, this invention:

[0073] Press the baffle 301 of the lifting plate 3 to align the slide groove 207 of the liquid storage box 2 with the slide rail 101, push the liquid storage box 2 to insert the monitoring protrusion 201 into the insertion port 103. When the liquid storage box 2 and the drainage box 1 are combined, the lifting plate 3 is reset by the spring force of the compression spring 4, the lifting rod 305 connected to the end of the lifting plate 3 rises in height, and the sliding column 8, which is horizontally connected to the lifting rod 305, slides away from the inclined plate 701 due to the restriction of the inclined plate 701. This pushes the first monitoring piece 5 and the second monitoring piece 6 toward the monitoring protrusion 201 to avoid gaps between the first monitoring piece 5 and the second monitoring piece 6 and the monitoring protrusion 201.

[0074] The working of the air extraction component in the drainage box 1 reduces the air pressure in the reservoir box 2. The hose connected to the extraction port 204 of the reservoir box 2 extracts the drainage fluid. After the drainage fluid flows through the monitoring tube 202, it enters the reservoir box 2. When the light sensing components 12 on both sides of the light blocking plate 10 detect a change in the color of the drainage fluid, the camera 13 can start recording the color change of the drainage fluid, providing timely warning of changes in the patient's condition. The drainage fluid that enters the reservoir box 2 flows slowly down the drainage ramp 206, minimizing the interference and fluctuation of the liquid level in the reservoir box 2, allowing the liquid level in the reservoir box 2 to rise steadily, and further improving the accuracy of drainage fluid monitoring.

[0075] After completing the chest drainage, lower the height of the lifting plate 3 so that the top of the baffle 301 is lower than the bottom of the reservoir 2, and the reservoir 2 can be smoothly slid out, separating the reservoir 2 from the drainage box 1. Since the separated reservoir 2 does not contain electronic components, the cover 203 of the reservoir 2 can be opened to facilitate cleaning of the reservoir 2.

[0076] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A thoracic negative pressure drainage device with flow monitoring function, characterized in that, include: A drainage box, wherein an air extraction assembly is installed inside the drainage box; The liquid storage box has a transparent monitoring protrusion on its side. The drainage box has an insertion port on its side for inserting the monitoring protrusion, and monitoring components facing the monitoring protrusion are located on both sides of the insertion port. The top of the liquid storage box is connected to a suction component inside the drainage box via a flexible hose. The bottom surface of the liquid storage box has a sliding groove. The drainage box has a slide rail for engaging the sliding groove. A lifting groove is parallel to the slide rail in the drainage box, and a lifting plate is slidably connected vertically within the lifting groove. A compression spring is installed between the bottom surface of the lifting plate and the lifting groove. When the top surface of the lifting plate is pressed against the bottom surface of the liquid storage box, a stop fixedly connected to one end of the lifting plate prevents the liquid storage box from separating from the drainage box. Two parallel lifting rods are fixedly connected to the other end of the lifting plate. The lifting rods are vertically positioned and horizontally slidably connected to sliding columns at intervals along their length. The inner wall of the drainage box is provided with fixing plates on both sides of the insertion port. The fixing plates on both sides of the insertion port are slidably connected to a first monitoring plate and a second monitoring plate that are parallel to each other. The two lifting rods are respectively located between the first monitoring plate and the corresponding fixing plate, and between the second monitoring plate and the corresponding fixing plate. The fixing plates are provided with inclined platforms that cooperate with the sliding columns facing the lifting rods. When the liquid storage box is installed in the drainage box, the top of the sliding column contacts the top of the inclined platform, and the first monitoring plate and the second monitoring plate are in close contact with the monitoring protrusion. The top surface of the lifting plate is provided with a receiving groove parallel to the slide rail. An insert is inserted into the receiving groove. When the insert is inserted into the receiving groove, its top surface is flush with the top surface of the lifting plate. A guide slot is also provided along the length direction at the middle position of the receiving groove. The width of the guide slot is the same as the thickness of the insert. When the insert is inserted into the guide slot, the top of the baffle is lower than the bottom surface of the liquid storage box.

2. The thoracic negative pressure drainage device with flow monitoring function according to claim 1, characterized in that: The liquid storage box has a monitoring tube on one side of the monitoring boss. The monitoring tube is U-shaped and the inlet and outlet are both located at the top of the liquid storage box. The drainage box has a light-blocking plate facing the monitoring tube to separate the parallel parts of the monitoring tube. The light-blocking plate has a light strip facing the liquid storage box in the vertical direction. The drainage box has light sensing components corresponding to the monitoring tubes on both sides of the light-blocking plate, and a camera is installed facing the monitoring tube.

3. The thoracic negative pressure drainage device with flow monitoring function according to claim 2, characterized in that: The monitoring tube has a liquid extraction port at one end and extends into the liquid storage box at the other end.

4. The pleural negative pressure drainage device with flow monitoring function according to claim 1, characterized in that: The top of the drainage box is provided with a connecting pipe groove facing the liquid storage box, and a first air interface is installed in the connecting pipe groove. The first air interface is connected to the air extraction component located inside the drainage box, and the liquid storage box is provided with a second air interface facing the connecting pipe groove.

5. The pleural negative pressure drainage device with flow monitoring function according to claim 3, characterized in that: The liquid storage box is equipped with an inclined liquid guiding slope, the top of which corresponds to the drain port of the monitoring tube, and the bottom of which extends to the bottom of the liquid storage box.

6. The pleural negative pressure drainage device with flow monitoring function according to claim 1, characterized in that: The top surface of the drainage box is rotatably connected to a touch screen, and a groove for accommodating the touch screen is provided on the top surface.

7. The pleural negative pressure drainage device with flow monitoring function according to claim 2, characterized in that: The liquid storage box is equipped with a light-shielding plate near the monitoring tube.

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