A closed chest drainage device with intelligent pressure regulation

Abstract

The present invention discloses a closed chest drainage device with intelligent pressure regulation, which belongs to the technical field of closed drainage. It comprises a water seal bottle, a connecting tube is provided on the suction end of the water seal bottle, one end of the connecting tube is connected to the suction end of the water seal bottle, a mounting cavity is provided on the other end of the connecting tube, one end of the mounting cavity is connected to the other end of the connecting tube, the other end of the mounting cavity is connected to one end of the drainage tube, an inclined arc guide rod is provided inside the mounting cavity, the arc guide rod is arranged directly below the connection part between the connecting tube and the mounting cavity, one end of the arc guide rod is fixed to the inner wall of the mounting cavity, a spring is sleeved on the arc guide rod, one end of the spring is fixedly connected to the inner wall of the mounting cavity at the lower end of the arc guide rod. This technical solution is used to solve the problems in the prior art of the existence of blind spots for clearing blockages in drainage tubes and the difficulty in matching the use of flexible drainage tubes.

Description

Technical Field

[0001] The present invention belongs to the technical field of closed drainage, and in particular relates to a closed chest drainage device with intelligent pressure regulation. Background Art

[0002] Closed thoracic drainage involves placing one end of a drainage tube into the chest cavity and connecting the other end to a water-seal bottle located lower than the tube. This allows for the removal of air or collection of fluid within the chest cavity, allowing the lungs to reopen and restore function. This procedure is widely used as a treatment for hemothorax, pneumothorax, and empyema, as well as after thoracotomy, and plays a crucial role in the treatment of these conditions.

[0003] At present, closed chest drainage devices have difficulties in detecting the pressure of the drainage tube and preventing the drainage tube from being blocked. For example, patent No. 202410423843.6 is a closed chest drainage intelligent device, including a drainage tube, characterized in that the outer surface of the drainage tube is connected to a detection tube, one end of the detection tube is connected to the upper end of the drainage tube, and the other end is connected to the lower end of the drainage tube; the device also includes a ring-shaped dredging rope, a part of the rope body of the dredging rope is located in the detection tube, and the other part of the rope body is located in the drainage tube.

[0004] In the above-mentioned prior art solution, although the purpose of clearing the drainage tube can be achieved by driving the clearing rope to move in the drainage tube, it is not difficult to understand that one end of the drainage tube is located in the chest cavity, and the clearing rope part cannot enter the chest cavity, and then there is a blind spot for clearing, resulting in poor use effect. At the same time, in the prior art, the drainage tube is generally a soft tube to facilitate the movement of the patient's body, and the solution in the above-mentioned prior art is not only large in size, but also not suitable for acting on soft drainage tubes. Therefore, the movement of the clearing rope will drive the entire drainage tube to move, which will bring great inconvenience to actual application. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an intelligent pressure-regulated closed chest drainage device to solve the problems in the prior art of devices for clearing drainage tube blockages, such as blind spots in clearing and difficulty in matching with flexible drainage tubes.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an intelligent pressure-regulated closed chest drainage device, comprising a water seal bottle, a connecting tube being provided on the suction end of the water seal bottle, one end of the connecting tube being communicated with the suction end of the water seal bottle, a mounting cavity being provided on the other end of the connecting tube, one end of the mounting cavity being communicated with the other end of the connecting tube, the other end of the mounting cavity being communicated with one end of the drainage tube, an inclined arc-shaped guide rod being provided inside the mounting cavity, the arc-shaped guide rod being arranged directly below the connection portion between the connecting tube and the mounting cavity, one end of the arc-shaped guide rod being fixed to the inner wall of the mounting cavity, a spring being sleeved on the arc-shaped guide rod, one end of the spring being fixedly connected to the inner wall of the mounting cavity at the lower end of the arc-shaped guide rod, and the other end of the spring being provided with a ferromagnetic A slip ring, one end of the slip ring is fixed to the other end of the spring, and the slip ring is sleeved on the arc guide rod, a fixing plate is provided on the outer wall of the installation cavity at the higher end of the arc guide rod, one end of the fixing plate is fixed to the outer surface of the installation cavity, an electromagnet for adsorbing the slip ring is provided on the fixing plate, the electromagnet is fixedly connected to the fixing plate, a guide wire is provided on the slip ring, one end of the guide wire is detachably connected to the slip ring, the other end of the guide wire passes through the end surface of the installation cavity and is located inside the drainage tube, and the other end of the guide wire is located below the end of the drainage tube located in the patient's chest cavity, and the distance between the end of the guide wire and the end of the drainage tube is equal to the maximum vertical movable distance of the slip ring.

[0008] Furthermore, a flexible hose is provided at the portion where the mounting cavity is connected to the drainage tube, one end of the flexible hose is communicated with the interior of the mounting cavity, and a connecting joint is provided on the other end of the flexible hose, and the connecting joint is communicated with the end portion of the drainage tube, and the diameter of the flexible hose is larger than the diameter of the drainage tube, and a mounting sleeve is provided on the outside of the flexible hose, one end of the mounting sleeve is detachably connected to the end surface of the mounting cavity, and a plurality of pressure diaphragms are evenly distributed on the circumference of the inner side surface of the mounting sleeve, and the pressure diaphragms are in contact with the outer surface of the flexible hose, and a plurality of the pressure diaphragms are electrically connected to the electromagnet, and the working state of the drainage tube is judged by collecting the pressure data changes of the relatively arranged pressure diaphragms, and then the working state of the electromagnet is controlled.

[0009] Furthermore, a vertically arranged retaining tube is provided on the other end of the mounting sleeve, one end of the retaining tube is detachably connected to the end of the mounting sleeve, the retaining tube is sleeved on the flexible hose above the other end of the mounting sleeve, and the inner diameter of the retaining tube matches the outer diameter of the flexible hose.

[0010] Furthermore, a data processing module is provided outside the installation cavity, a plurality of the pressure diaphragms are electrically connected to the data processing module, and the data processing module is electrically connected to the electromagnet.

[0011] Furthermore, a plurality of evenly distributed annular grooves are provided in the length direction of the guide wire, and the annular grooves form a "7-shaped" notch on the surface of the guide wire, and the transverse portion of the "7-shaped" notch is arranged toward the end of the drainage tube located in the chest cavity.

[0012] Furthermore, the spring is made of plastic.

[0013] Furthermore, the slip ring is made of carbon steel, and the surface of the slip ring is provided with an anti-corrosion coating.

[0014] The beneficial effects of the present invention are:

[0015] (1) In this technical solution, the guide wire can match the curvature of the drainage tube, that is, it is only necessary to control the operation of the electromagnet so that it can be intermittently powered on and off. Then, when the electromagnet is on, the electromagnet will overcome the resistance of the spring and drive the slip ring to move toward the higher end of the arc guide rod, that is, the spring is stretched at this time. When the slip ring is adsorbed to the highest point of the arc guide rod, the electromagnet is de-energized. Under the action of the spring reset, the slip ring is driven to retract, and then the change in the height of the slip ring on the arc guide rod will drive the guide wire to move up and down in the drainage tube, and then push and pull the blocked tissue in the drainage tube, and then destroy the structure of the blocked tissue. Then, under the action of the negative pressure in the drainage tube, the guide wire can be adsorbed downward, thereby eliminating the blockage, restoring the normal pressure in the drainage tube, and improving the drainage effect;

[0016] (2) The distance between the end of the guide wire and the end of the drainage tube is equal to the maximum height difference of the slip ring. The advantage of this is that the guide wire can destroy and eliminate the blockage inside the entire drainage tube, and at the same time will not extend out of the drainage tube, that is, it will not cause damage to the tissues in the chest cavity.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0019] Figure 1 is a three-dimensional schematic diagram of the closed chest drainage device of the present invention;

[0020] Figure 2 This is a schematic diagram of an internal cross-sectional view of the closed chest drainage device of the present invention;

[0021] Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0022] Figure 4 This is a schematic diagram of an internal cross-sectional view of the closed chest drainage device of the present invention at the connection hose;

[0023] Figure 5 Schematic diagram of an annular groove provided on a guide wire in a closed chest drainage device of the present invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of the closed chest drainage device of the present invention installed on the drainage tube;

[0025] Figure 7 The figure is a schematic diagram of the internal cross-section of the closed chest drainage device of the present invention installed on the drainage tube.

[0026] The following are marked in the accompanying drawings:

[0027] 1. Water seal bottle; 2. Connecting pipe; 3. Mounting cavity; 4. Arc guide rod; 5. Slip ring; 6. Spring; 7. Fixing plate; 8. Electromagnet; 9. Guide wire; 10. Flexible hose; 11. Mounting sleeve; 12. Pressure diaphragm; 13. Retaining tube; 14. Connecting joint; 15. Drainage tube; 16. Wire; 17. Data processing module; 18. Annular groove. DETAILED DESCRIPTION

[0028] like Figures 1 to 7As shown, the present invention is an intelligent pressure-regulated closed chest drainage device, including a water seal bottle 1. The water seal bottle 1 is a component used in the prior art and will not be described in detail here. A connecting tube 2 is provided on the suction end of the water seal bottle 1. One end of the connecting tube 2 is connected to the suction end of the water seal bottle 1, and the other end of the connecting tube 2 is provided with a mounting cavity 3. The interior of the mounting cavity 3 is hollow, and end plates are provided at both ends. One end of the mounting cavity 3 is connected to the other end of the connecting tube 2, and the other end of the mounting cavity 3 is connected to the drainage tube 15. One end is connected, and the interior of the installation cavity 3 is provided with an inclined arc guide rod 4, which is arranged just below the connection part between the connecting pipe 2 and the installation cavity 3. One end of the arc guide rod 4 is fixed to the inner wall of the installation cavity 3, and a spring 6 is sleeved on the arc guide rod 4. One end of the spring 6 is fixedly connected to the inner wall of the installation cavity 3 at the lower end of the arc guide rod 4. A ferromagnetic slip ring 5 is provided on the other end of the spring 6. One end of the slip ring 5 is fixed to the other end of the spring 6, and the slip ring 5 is sleeved on the arc guide rod 4. On the curved guide rod 4, a fixing plate 7 is provided on the outer wall of the mounting cavity 3 at the higher end of the curved guide rod 4. One end of the fixing plate 7 is fixed to the outer surface of the mounting cavity 3. An electromagnet 8 for adsorbing the slip ring 5 is provided on the fixing plate 7. The structure of the electromagnet 8 is well known to those skilled in the art and will not be described in detail here. The electromagnet 8 is fixedly connected to the fixing plate 7. A guide wire 9 is provided on the slip ring 5. The guide wire 9 is a component used for endoscopes or fallopian tube occlusion in the prior art, and is relatively soft in the horizontal direction and has a certain rigidity in the vertical direction. It can be understood that the guide wire 9 can be bent and can adapt to the bending degree of the drainage tube 15. However, when one end of the guide wire 9 is subjected to force, it can drive the guide wire 9 to move as a whole. One end of the guide wire 9 is detachably connected to the slip ring 5, and the other end of the guide wire 9 passes through the end surface of the mounting cavity 3 and is located inside the drainage tube 15. The other end of the guide wire 9 is located below the end of the drainage tube 15 located in the patient's chest cavity, and the distance between the end of the guide wire 9 and the end of the drainage tube 15 is equal to the maximum vertical movable distance of the slip ring 5.

[0029] The working principle of the above technical solution is:

[0030] When the medical staff finds that the drainage tube 15 is blocked, they only need to control the electromagnet 8 to intermittently turn it on and off. When the electromagnet 8 is turned on, the electromagnet 8 will overcome the resistance of the spring 6 and drive the slip ring 5 to move toward the higher end of the arc guide rod 4. At this time, the spring 6 is stretched. When the slip ring 5 is adsorbed to the highest point of the arc guide rod 4, the electromagnet 8 is de-energized. Under the action of the spring 6 resetting, the slip ring 5 is driven to retract. Then, the change in the height of the slip ring 5 on the arc guide rod 4 will drive the guide wire 9 to move up and down in the drainage tube 15, thereby pushing and pulling the blocked tissue in the drainage tube 15, thereby destroying the structure of the blocked tissue, and then being adsorbed downward under the action of the negative pressure in the drainage tube 15, thereby eliminating the blockage.

[0031] It should be noted that the advantage of the setting of spring 6 is that, during the resetting process of spring 6, its elastic potential energy does not disappear all at once, so it will move back and forth repeatedly, thereby driving the guide wire 9 to move upward and vibrate at a high frequency, thereby vibrating and destroying the blocked tissue, thereby improving the effect of removing the blockage; at the same time, through the setting of ferromagnetic slip ring 5 and electromagnet 8, the guide wire 9 is driven to move in a contactless manner, thereby ensuring the sealing performance of the entire system and improving the negative pressure drainage effect. At the same time, the driving component is arranged on the outside of the installation cavity 3, which can greatly ensure the sterility effect inside the system; furthermore, the distance between the end of the guide wire 9 and the end of the drainage tube 15 is equal to the maximum height difference of the slip ring 5. The advantage of this is that the guide wire 9 can destroy and eliminate the blockage inside the entire drainage tube 15, and at the same time will not extend out of the drainage tube 15, that is, it will not cause damage to the tissue in the chest cavity.

[0032] In one feasible manner, a flexible hose 10 is provided at the connection portion between the mounting cavity 3 and the drainage tube 15, which can be understood as a hose made of the same material as the drainage tube 15. One end of the flexible hose 10 is communicated with the interior of the mounting cavity 3, and a connecting joint 14 is provided on the other end of the flexible hose 10. The connecting joint 14 is communicated with the end portion of the drainage tube 15. The diameter of the flexible hose 10 is larger than the diameter of the drainage tube 15. A mounting sleeve 11 is provided on the outside of the flexible hose 10. One end of the mounting sleeve 11 is detachably connected to the end surface of the mounting cavity 3. Several pressure diaphragms 12 are evenly distributed on the circumference of the inner surface of the mounting sleeve 11. The pressure diaphragm 12 is the existing technology. The pressure diaphragm 12 is in contact with the outer surface of the flexible hose 10. Several pressure diaphragms 12 are electrically connected to the electromagnet 8. By collecting the pressure data changes of the relatively arranged pressure diaphragms 12, the working state of the drainage tube 15 is judged, and then the working state of the electromagnet 8 is controlled.

[0033] The working principle of the above technical solution is:

[0034] When the drainage tube 15 is blocked, the water seal bottle 1 will continue to suck the drainage tube 15, and no air will enter the end of the drainage tube 15 located in the chest cavity. Therefore, in a relatively short period of time, the shapes of the drainage tube 15 and the flexible hose 10 will be flattened under the action of atmospheric pressure, that is, it can be understood that they are deformed. It is not difficult to understand that when the flexible hose 10 is flattened, it will change from a circular shape to a rectangular shape (of course, the degree of deformation may not be too large), and then the several pressure diaphragms 12 in contact with the flexible hose 10 will change from the initial contact pressure being basically the same to the pressure detected by the several relatively arranged pressure diaphragms 12 increasing, while the pressure detected by the relatively arranged pressure diaphragms 12 in the other direction decreasing, and then it can be determined that the flexible hose 10 has been deformed, and then it can be determined that the drainage tube 15 is blocked, and then the electromagnet 8 can be driven to be intermittently energized by sending a signal to start the operation of eliminating the blockage;

[0035] It is not difficult to understand that the purpose of the diameter of the flexible hose 10 being larger than the diameter of the commonly used drainage tube 15 is that the tissue flowing from the drainage tube 15 to the flexible hose 10 will not cause blockage to the flexible hose 10, thereby avoiding the problem of the flexible hose 10 being blocked, resulting in the inability to deform under the action of negative pressure. That is, this setting method can eliminate the blind spot of blockage detection, and then this method of monitoring deformation through pressure and then judging whether the drainage tube 15 is blocked can monitor and judge the blockage of any part in the drainage tube 15.

[0036] In one practicable embodiment, a vertically arranged retaining tube 13 is provided on the other end of the mounting sleeve 11, one end of the retaining tube 13 is detachably connected to the end of the mounting sleeve 11, and the retaining tube 13 is sleeved on the flexible hose 10 above the other end of the mounting sleeve 11, and the inner diameter of the retaining tube 13 matches the outer diameter of the flexible hose 10.

[0037] The advantage of setting up the retaining tube 13 is that, since the drainage tube 15 and the flexible hose 10 are both hoses, they are very likely to bend during actual use, resulting in excessively large differences in contact pressure between the pressure diaphragms 12 and the outer walls of the flexible hose 10, which may lead to deviations in the later judgment of blockage of the drainage tube 15. The setting of the retaining tube 13 can control the deformation of the flexible hose 10 at the upper end or inside of the retaining tube 13, ensuring that the portion of the flexible hose 10 in contact with the pressure diaphragm 12 does not deform, so that it always remains vertical and cylindrical.

[0038] In one practicable manner, a data processing module 17 is provided outside the installation cavity 3 , the pressure diaphragms 12 are electrically connected to the data processing module 17 via wires 16 , and the data processing module 17 is electrically connected to the electromagnet 8 via wires 16 .

[0039] It should be noted that the data processing module 17 processes the data collected by the sensor (for example, numbering several pressure diaphragms 12 in advance, determining the numbers of the relatively set pressure diaphragms 12, and then processing and judging the pressure changes of the relatively set pressure diaphragms 12 during later processing) and sends electrical signals to the electromagnet 8. The working principle is existing technology and will not be elaborated on here.

[0040] Specifically, reference may be made to the control principles in the prior art, such as sensor perception of environmental information: the sensor perceives physical or chemical quantities in the environment according to its characteristics, and converts them into electrical signals (the pressure diaphragm 12 collects pressure values); signal conversion: the information perceived by the sensor from the environment is generally an analog signal, which needs to be converted into a digital signal before it can be processed in the control circuit, which is usually achieved through an analog-to-digital converter (ADC); signal processing and control circuit: the digital signal converted by the sensor is processed by the control circuit and filtered, amplified, denoised, etc. to ensure the accuracy and stability of the signal. At the same time, the control circuit also controls the working state of the electromagnet 8 according to the sensor signal.

[0041] In one feasible embodiment, a plurality of evenly distributed annular grooves 18 are provided along the length direction of the guide wire 9, and the annular grooves 18 form a "7-shaped" notch on the surface of the guide wire 9, and the transverse portion of the "7-shaped" notch is arranged toward the end of the drainage tube 15 located in the chest cavity.

[0042] The specific structure of the annular groove 18 is as follows: Figure 5 As shown, the annular groove 18 is set in a concave manner inside the guide wire 9, and the horizontal distribution of the "7-shaped" notch formed after the concave is located at the top, and the vertical part is located at the bottom. The advantage of this is that when the guide wire 9 moves upward, the annular groove 18 will not interfere with the blocked tissue, so that the guide wire 9 can smoothly pass through the blocked tissue and move upward. When the guide wire 9 moves downward, the blocked tissue contacts the outer surface of the guide wire 9 and enters the annular groove 18. The upper end of the annular groove 18 is concave, and it will hook the blocked tissue and then carry it downward. That is, under the continuous reciprocating action of the guide wire 9, the blocked tissue can be driven to be discharged from the external end of the drainage tube 15, avoiding pushing the blocked tissue into the chest cavity. At the same time, the complete blocked tissue can also be squeezed, cut and destroyed to facilitate suction by negative pressure.

[0043] In one practicable manner, the spring 6 is made of plastic, and the slip ring 5 is made of carbon steel, and the surface of the slip ring 5 is provided with an anti-corrosion coating to avoid corrosion damage and the problem of bacteria breeding in the internal environment.

[0044] It should be noted that the detachable connection in the present technical solution is to facilitate the disinfection and cleaning of components such as the guide wire 9, spring 6 and arc guide rod 4, so as to facilitate reuse, and the detachable connection can be achieved through threaded connection or clamp connection, etc., which are common technical means used by those skilled in the art and will not be described in detail here. At the same time, it is preferred that one end face of the mounting cavity 3 is snap-fitted with the main body to further facilitate the disinfection and cleaning of the internal components.

[0045] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An intelligent pressure-regulated closed chest drainage device, characterized by: The invention comprises a water seal bottle (1), wherein a connecting pipe (2) is provided on the suction end of the water seal bottle (1), one end of the connecting pipe (2) is communicated with the suction end of the water seal bottle (1), and a mounting cavity (3) is provided on the other end of the connecting pipe (2), one end of the mounting cavity (3) is communicated with the other end of the connecting pipe (2), and the other end of the mounting cavity (3) is communicated with one end of a drainage pipe (15), and an inclined arc guide rod (4) is provided inside the mounting cavity (3), and the arc guide rod (4) is arranged directly below the connection portion between the connecting pipe (2) and the mounting cavity (3), one end of the arc guide rod (4) is fixed on the inner wall of the mounting cavity (3), and a spring (6) is sleeved on the arc guide rod (4), one end of the spring (6) is fixedly connected to the inner wall of the mounting cavity (3) at the lower end of the arc guide rod (4), and a ferromagnetic slip ring (5) is provided on the other end of the spring (6), and the slip ring (5) One end of the guide wire (5) is fixed to the other end of the spring (6), and the slip ring (5) is sleeved on the arc guide rod (4). A fixing plate (7) is provided on the outer wall of the installation cavity (3) at the higher end of the arc guide rod (4). One end of the fixing plate (7) is fixed to the outer surface of the installation cavity (3). The fixing plate (7) is provided with an electromagnet (8) for adsorbing the slip ring (5). The electromagnet (8) is fixedly connected to the fixing plate (7). A guide wire (9) is provided on the slip ring (5). One end of the guide wire (9) is detachably connected to the slip ring (5). The other end of the guide wire (9) passes through the end surface of the installation cavity (3) and is located inside the drainage tube (15). The other end of the guide wire (9) is located below the end of the drainage tube (15) located in the patient's chest cavity. The distance between the end of the guide wire (9) and the end of the drainage tube (15) is equal to the maximum vertical movable distance of the slip ring (5).

2. The intelligent pressure-regulated closed chest drainage device according to claim 1, characterized in that: A flexible hose (10) is provided at the portion where the installation cavity (3) is connected to the drainage tube (15), one end of the flexible hose (10) is in communication with the interior of the installation cavity (3), and a connecting joint (14) is provided at the other end of the flexible hose (10), and the connecting joint (14) is in communication with the end of the drainage tube (15). The diameter of the flexible hose (10) is larger than the diameter of the drainage tube (15). An installation sleeve (11) is provided on the outside of the flexible hose (10), and one end of the installation sleeve (11) is detachably connected to the end surface of the installation cavity (3). A plurality of pressure diaphragms (12) are uniformly distributed on the circumference of the inner side surface of the installation sleeve (11), and the pressure diaphragms (12) are in contact with the outer surface of the flexible hose (10). The plurality of pressure diaphragms (12) are electrically connected to the electromagnet (8). By collecting the pressure data changes of the relatively arranged pressure diaphragms (12), the working state of the drainage tube (15) is judged, and the working state of the electromagnet (8) is then controlled.

3. The intelligent pressure-regulated closed chest drainage device according to claim 2, characterized in that: A vertically arranged retaining tube (13) is provided on the other end of the mounting sleeve (11), one end of the retaining tube (13) is detachably connected to the end of the mounting sleeve (11), the retaining tube (13) is sleeved on the flexible hose (10) above the other end of the mounting sleeve (11), and the inner diameter of the retaining tube (13) matches the outer diameter of the flexible hose (10).

4. The intelligent pressure-regulated closed chest drainage device according to claim 2, characterized in that: A data processing module (17) is provided on the outside of the installation cavity (3), a plurality of the pressure diaphragms (12) are electrically connected to the data processing module (17), and the data processing module (17) is electrically connected to the electromagnet (8).

5. The intelligent pressure-regulated closed chest drainage device according to claim 1, characterized in that: A plurality of evenly distributed annular grooves (18) are provided along the length direction of the guide wire (9), and the annular grooves (18) form a "7-shaped" notch on the surface of the guide wire (9), and the transverse portion of the "7-shaped" notch is arranged toward the end of the drainage tube (15) located in the chest cavity.

6. The intelligent pressure-regulated closed chest drainage device according to claim 1, characterized in that: The material of the spring (6) is plastic.

7. The intelligent pressure-regulated closed chest drainage device according to claim 1, characterized in that: The slip ring (5) is made of carbon steel, and the surface of the slip ring (5) is provided with an anti-corrosion coating.

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