Pleural effusion drainage device for postoperative treatment

Abstract

The invention discloses a pleural effusion drainage device for postoperative treatment, which comprises a drainage tube, a liquid collection container, a negative pressure generation device and a controller, one end of the drainage tube is communicated with the liquid collection container, the other end of the drainage tube is provided with a drainage end, the inner side of the drainage end is provided with a first pressure sensor, and the drainage tube is provided with a contraction part; a second pressure sensor is arranged on the inner side of the contraction part; and the negative pressure generating device is communicated with the liquid collecting container and is electrically connected with the controller. The negative pressure of the liquid collecting container is controlled through the negative pressure generating device, the negative pressure of the liquid collecting container is kept in a proper state, a good drainage effect can be obtained, and postoperative observation and recovery of a patient are facilitated. Besides, a contraction part is designed on the drainage tube, the viscous hydrops are gathered at the contraction part, the pressure of the contraction part is detected by a second pressure sensor, and if the contraction part is blocked, the drainage tube can be kept unobstructed by increasing the negative pressure output of the negative pressure generating device.

Description

Technical Field

[0001] The invention belongs to the technical field of thoracic drainage, and in particular relates to a pleural effusion drainage device for postoperative treatment. Background Art

[0002] The chest drainage tube is the most commonly used drainage catheter in thoracic surgery. Its function is to drain residual effusion, gas accumulation, blood accumulation or pus in the chest cavity caused by various reasons out of the body, so as to promote lung re-expansion, clear the infection focus and improve the patient's symptoms and prognosis. The chest drainage tubes commonly used in clinical practice are mostly single-lumen silicone catheters with drainage holes at the head end, and different tube diameters are designed according to the patient's condition.

[0003] Chinese patent document CN213312236U discloses a pleural effusion drainage device, including a three-way valve, a pleural drainage tube, a guide tube and a water seal bottle, wherein the three-way valve has a first interface, a second interface and a third interface, one end of the pleural drainage tube is connected to the first interface, one end of the guide tube is connected to the third interface, and the other end is connected to the water seal bottle, and the pleural effusion drainage device also includes a check valve and a positive pressure needle-free sealed infusion connector, the liquid outlet of the check valve is connected to the second interface, and the liquid outlet of the positive pressure needle-free sealed infusion connector is connected to the liquid inlet of the check valve. This pleural effusion drainage device is not only convenient for medical staff to replace the water seal bottle, inject drugs into the pleural cavity, etc., but also can avoid the leakage of liquid medicine during the process of injecting drugs into the pleural cavity, and can improve the work efficiency of medical staff.

[0004] For patients with simple gas or fluid accumulation, the drainage tube of the above patent document can basically achieve the purpose of smooth drainage after placement. However, for patients with pus or blood accumulation, the drainage effect of the chest drainage tube will be limited. In addition, the pus and blood in the chest cavity are often relatively viscous, and the secondary cellulose often wraps the drainage hole, resulting in poor drainage of pus or blood accumulation, and even catheter blockage, affecting the patient's postoperative observation and recovery. Summary of the invention

[0005] The purpose of the present invention is to provide a pleural effusion drainage device for postoperative treatment, so as to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pleural effusion drainage device for postoperative treatment, comprising a drainage tube, a liquid collecting container, a negative pressure generating device and a controller, one end of the drainage tube is connected to the liquid collecting container, and the other end of the drainage tube is provided with a drainage end, and a first pressure sensor is provided on the inner side of the drainage end, and the first pressure sensor is used to detect a first pressure value of the drainage end; a contraction part is provided on the drainage tube, and a second pressure sensor is provided on the inner side of the contraction part, and the second pressure sensor is used to detect a second pressure value of the contraction part, and the second pressure sensor and the first pressure sensor are both electrically connected to the controller; the negative pressure generating device is connected to the liquid collecting container, and the negative pressure generating device is electrically connected to the controller, and when the first pressure value or the second pressure value exceeds its threshold value, the controller adjusts the working state of the negative pressure generating device to control the internal pressure of the liquid collecting container.

[0007] As an optional implementation of the above technical solution, the negative pressure generating device includes a negative pressure fan, a connecting pipe is provided between the negative pressure fan and the liquid collecting container, and the negative pressure fan is electrically connected to the controller.

[0008] As an optional implementation of the above technical solution, the connecting pipe includes a first pipeline and a second pipeline, a buffer container is provided between the first pipeline and the second pipeline, and the liquid collecting container, the first pipeline, the buffer container, the second pipeline and the negative pressure fan are connected in sequence.

[0009] As an optional implementation of the above technical solution, the controller is connected to a pressure comparison module, which is used to compare the first pressure value and the second pressure value to obtain a pressure difference. The controller controls the negative pressure fan to respond by increasing or decreasing the negative pressure output based on the pressure difference.

[0010] As an optional implementation of the above technical solution, the controller is connected to an alarm module, and the alarm module is used to issue different alarms based on the first pressure value, the second pressure value and the pressure difference.

[0011] As an optional implementation of the above technical solution, it also includes a flushing tube, which is arranged along the drainage tube. A flushing head is provided at one end of the flushing tube close to the drainage end, and the other end of the flushing tube extends to the outside of the drainage tube and is connected to a flushing connector.

[0012] As an optional implementation of the above technical solution, the flushing tube is inserted into the drainage tube, and the flushing head is arranged on the inner side of the drainage tube.

[0013] As an optional implementation of the above technical solution, the flushing head is provided with a liquid spraying arc surface, and a plurality of spray holes are evenly distributed on the liquid spraying arc surface.

[0014] As an optional implementation of the above technical solution, a one-way valve is provided inside the flushing tube.

[0015] As an optional implementation of the above technical solution, a drainage switch is provided on the drainage tube.

[0016] As an optional implementation of the above technical solution, the liquid collecting container includes a liquid collecting bottle, the surface of the liquid collecting bottle is provided with scale lines, the liquid collecting bottle is provided with a pressure detection mechanism, and the pressure detection mechanism is electrically connected to the controller.

[0017] As an optional implementation of the above technical solution, a drain pipe is provided at the bottom of the liquid collecting bottle, and a drain switch is provided on the drain pipe.

[0018] The beneficial effects of the present invention are:

[0019] The present invention controls the negative pressure of the liquid collection container through a negative pressure generating device, and maintains the negative pressure of the liquid collection container in a suitable state, so as to obtain a better drainage effect, which is beneficial to the observation and recovery of the patient after surgery. In addition, the present invention designs a contraction part on the drainage tube so that the viscous effusion is gathered in the contraction part, and uses a second pressure sensor to detect the pressure of the contraction part. If the contraction part is blocked, the negative pressure output of the negative pressure generating device can be increased to keep the drainage tube unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a pleural effusion drainage device in one embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of a drainage tube and a flushing tube in one embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a flushing head in one embodiment of the present invention;

[0023] Figure 4 It is a control block diagram of a pleural effusion drainage device in one embodiment of the present invention.

[0024] In the figure: 1-drainage tube; 2-controller; 3-first pressure sensor; 4-contraction part; 5-second pressure sensor; 6-negative pressure fan; 7-first pipeline; 8-second pipeline; 9-buffer container; 10-pressure comparison module; 11-alarm module; 12-flushing tube; 13-flushing head; 14-flushing connector; 15-injection hole; 16-one-way valve; 17-drainage switch; 18-liquid collecting bottle; 19-pressure detection mechanism; 20-drainage tube; 21-drainage switch. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1 As shown, this embodiment provides a pleural effusion drainage device for postoperative treatment, including a drainage tube 1, a fluid collection container, a negative pressure generating device and a controller 2. The drainage tube 1 is used to drain the patient's pleural effusion so that the liquid enters the fluid collection container, and the negative pressure generating device is used to generate negative pressure so that the pleural effusion can flow smoothly into the fluid collection container. The drainage tube 1 is provided with a drainage switch 17 to facilitate the control of the drainage tube 1.

[0027] One end of the drainage tube 1 is connected to the liquid collection container, and the other end of the drainage tube 1 is provided with a drainage end, which is inserted into the chest cavity of the patient. A first pressure sensor 3 is provided inside the drainage end, and the first pressure sensor 3 is used to detect a first pressure value of the drainage end. A contraction portion 4 is provided on the drainage tube 1, and a second pressure sensor 5 is provided inside the contraction portion 4, and the second pressure sensor 5 is used to detect a second pressure value of the contraction portion 4. The second pressure sensor 5 and the first pressure sensor 3 are both electrically connected to the controller 2. The negative pressure generating device is connected to the liquid collection container, and the negative pressure generating device is electrically connected to the controller 2. When the first pressure value or the second pressure value exceeds its threshold value, the controller 2 adjusts the working state of the negative pressure generating device to control the internal pressure of the liquid collection container.

[0028] For patients with pus or blood accumulation, if the viscous effusion is blocked at the drainage end, the first pressure sensor 3 can quickly detect the abnormal pressure information, and the controller 2 can quickly adjust the negative pressure of the liquid collection container through the negative pressure generating device, so that the viscous effusion passes through the drainage end and then enters the inside of the drainage end; the contraction part 4 is a part that is easy to be blocked, and the viscous effusion is easy to gather at the contraction part 4. If the drainage tube 1 is blocked, the second pressure sensor 5 can quickly detect the abnormal pressure information, and the controller 2 can quickly adjust the negative pressure of the liquid collection container through the negative pressure generating device, so that the viscous effusion passes through the contraction part 4 to prevent the drainage tube 1 from being blocked. Since the viscous effusion is easy to be blocked inside the drainage tube 1, and the blockage position is not easy to detect, the present invention designs the contraction part 4 on the drainage tube 1, so that the viscous effusion is gathered at the contraction part 4, and uses the second pressure sensor 5 to detect the pressure of the contraction part 4. If the contraction part 4 is blocked, the negative pressure output of the negative pressure generating device can be increased to keep the drainage tube 1 unobstructed.

[0029] The present invention controls the negative pressure of the liquid collection container through a negative pressure generating device, and maintains the negative pressure of the liquid collection container in a suitable state, so as to obtain a better drainage effect, which is beneficial to the observation and recovery of the patient after surgery. In addition, the present invention designs a contraction portion 4 on the drainage tube 1, so that the viscous effusion is gathered in the contraction portion 4, and uses a second pressure sensor 5 to detect the pressure of the contraction portion 4. If the contraction portion 4 is blocked, the negative pressure output of the negative pressure generating device can be increased to keep the drainage tube 1 unobstructed.

[0030] Specifically, the liquid collecting container includes a liquid collecting bottle 18, the surface of the liquid collecting bottle 18 is provided with scale lines, the liquid collecting bottle 18 is provided with a pressure detection mechanism 19, and the pressure detection mechanism 19 is electrically connected to the controller 2. The negative pressure state inside the liquid collecting bottle 18 is easy to understand through the pressure detection mechanism 19, and the controller 2 further determines the blockage state of the drainage tube 1 in combination with the first pressure value, the second pressure value and the detection information of the pressure detection mechanism 19. A drainage pipe 20 is provided at the bottom of the liquid collecting bottle 18, and a drainage switch 21 is provided on the drainage pipe 20. If the liquid collecting bottle 18 is full of collected liquid, the drainage switch 21 can be turned on, and the liquid inside the liquid collecting bottle 18 can be discharged by using the drainage pipe 20, which does not affect the normal use of the liquid collecting bottle 18.

[0031] Example 2

[0032] This embodiment is optimized based on embodiment 1. Figure 1 As shown, specifically, the negative pressure generating device includes a negative pressure fan 6, a connecting pipe is provided between the negative pressure fan 6 and the liquid collecting container, and the negative pressure fan 6 is electrically connected to the controller 2. The controller 2 controls the output power of the negative pressure fan 6, thereby controlling the rotation speed of the negative pressure fan 6 to achieve negative pressure control of the liquid collecting container. When the drainage tube 1 is blocked, the rotation speed of the negative pressure fan 6 increases, the negative pressure of the liquid collecting container increases, and the accumulated liquid enters the liquid collecting container smoothly; after the accumulated liquid flows normally, the negative pressure fan 6 reduces the rotation speed, the negative pressure of the liquid collecting container decreases, and the accumulated liquid enters the liquid collecting container normally. It should be noted that if the accumulated liquid can enter the liquid collecting container without negative pressure, the negative pressure fan 6 can be turned off to allow the accumulated liquid to enter the liquid collecting container under the action of gravity.

[0033] Specifically, the connecting pipe includes a first pipeline 7 and a second pipeline 8, a buffer container 9 is provided between the first pipeline 7 and the second pipeline 8, and the liquid collecting container, the first pipeline 7, the buffer container 9, the second pipeline 8 and the negative pressure fan 6 are connected in sequence. The first pipeline 7 is located at the top of the liquid collecting container, and the accumulated liquid will not enter the first pipeline 7. The buffer container 9 has a pressure stabilizing effect, which can reduce the internal pressure fluctuation of the liquid collecting container and prevent the sudden change of the pressure of the drainage tube 1 causing discomfort to the patient. The present invention utilizes the negative pressure fan 6 to generate negative pressure inside the liquid collecting container, and uses the buffer container 9 to stabilize the gas flow to prevent the negative pressure fan 6 from increasing the negative pressure output or reducing the negative pressure output when the internal pressure of the liquid collecting container changes sharply.

[0034] Example 3

[0035] This embodiment is optimized based on embodiment 2. Figure 4As shown, specifically, the controller 2 is connected to a pressure comparison module 10, and the pressure comparison module 10 is used to compare the first pressure value and the second pressure value to obtain a pressure difference. The controller 2 controls the negative pressure fan 6 to increase or decrease the negative pressure output based on the pressure difference. The pressure comparison module 10 compares the pressure values ​​of the drainage end and the contraction part 4 to obtain the pressure difference between the drainage end and the contraction part 4. The controller 2 determines the blockage state of the drainage tube 1 based on the pressure difference, and then controls the negative pressure fan 6 to increase or decrease the negative pressure output in response to keep the drainage tube 1 unobstructed.

[0036] Preferably, the controller 2 is connected to an alarm module 11, and the alarm module 11 is used to issue different alarms based on the first pressure value, the second pressure value and the pressure difference. When different blockages occur in the drainage tube 1, the controller 2 controls the alarm module 11 to issue different alarms, which is convenient for medical staff to handle in time.

[0037] Example 4

[0038] This embodiment is optimized based on embodiment 1. Figure 2 and Figure 3 As shown, specifically, the pleural effusion drainage device further includes a flushing tube 12, the flushing tube 12 is arranged along the drainage tube 1, one end of the flushing tube 12 close to the drainage end is provided with a flushing head 13, and the other end of the flushing tube 12 extends to the outside of the drainage tube 1 and is connected to a flushing joint 14. The flushing tube 12 is inserted into the drainage tube 1, and the flushing head 13 is arranged on the inner side of the drainage tube 1. The flushing head 13 is provided with a liquid spraying arc surface, and a plurality of spray holes 15 are evenly distributed on the liquid spraying arc surface.

[0039] The present invention provides a flushing tube 12 separately, and the front end of the flushing tube 12 has a liquid spraying arc surface, and a plurality of spray holes 15 are evenly distributed on the liquid spraying arc surface, so that the patient's chest cavity can be flushed in multiple directions, and the flushing tube 12 can also be used to infuse drugs into the patient's chest cavity in the later stage of drainage, avoiding the problem of inserting a pipe for infusing drugs and increasing the patient's pain. The present invention can drain the effusion in the chest cavity through the drainage tube 1, and can flush the infectious chest cavity by inputting liquid through the flushing tube 12, which is convenient for the drainage of pleural effusion and the control of infection.

[0040] Preferably, a one-way valve 16 is provided inside the flushing tube 12. The front end of the flushing tube 12 is provided with a one-way valve 16 for only one-way flow of the flushing fluid, which effectively prevents the effusion and blood accumulation in the pleural cavity from entering and contaminating the flushing tube 12 and causing retrograde infection of the drainage fluid. The effusion, blood accumulation and flushing fluid in the pleural cavity can be drained out through the drainage tube 1 under the action of negative pressure, which is conducive to the smooth recovery of the patient.

[0041] Example 5

[0042] like Figure 1-Figure 4 As shown, this embodiment provides a pleural effusion drainage device for postoperative treatment, including a drainage tube 1, a fluid collection container, a negative pressure generating device and a controller 2. The drainage tube 1 is used to drain the patient's pleural effusion so that the liquid enters the fluid collection container, and the negative pressure generating device is used to generate negative pressure so that the pleural effusion can flow smoothly into the fluid collection container. The drainage tube 1 is provided with a drainage switch 17 to facilitate the control of the drainage tube 1.

[0043] One end of the drainage tube 1 is connected to the liquid collection container, and the other end of the drainage tube 1 is provided with a drainage end, which is inserted into the chest cavity of the patient. A first pressure sensor 3 is provided inside the drainage end, and the first pressure sensor 3 is used to detect a first pressure value of the drainage end. A contraction portion 4 is provided on the drainage tube 1, and a second pressure sensor 5 is provided inside the contraction portion 4, and the second pressure sensor 5 is used to detect a second pressure value of the contraction portion 4. The second pressure sensor 5 and the first pressure sensor 3 are both electrically connected to the controller 2. The negative pressure generating device is connected to the liquid collection container, and the negative pressure generating device is electrically connected to the controller 2. When the first pressure value or the second pressure value exceeds its threshold value, the controller 2 adjusts the working state of the negative pressure generating device to control the internal pressure of the liquid collection container.

[0044] For patients with pus or blood accumulation, if the viscous effusion is blocked at the drainage end, the first pressure sensor 3 can quickly detect the abnormal pressure information, and the controller 2 can quickly adjust the negative pressure of the liquid collection container through the negative pressure generating device, so that the viscous effusion passes through the drainage end and then enters the inside of the drainage end; the contraction part 4 is a part that is easy to be blocked, and the viscous effusion is easy to gather at the contraction part 4. If the drainage tube 1 is blocked, the second pressure sensor 5 can quickly detect the abnormal pressure information, and the controller 2 can quickly adjust the negative pressure of the liquid collection container through the negative pressure generating device, so that the viscous effusion passes through the contraction part 4 to prevent the drainage tube 1 from being blocked. Since the viscous effusion is easy to be blocked inside the drainage tube 1, and the blockage position is not easy to detect, the present invention designs the contraction part 4 on the drainage tube 1, so that the viscous effusion is gathered at the contraction part 4, and uses the second pressure sensor 5 to detect the pressure of the contraction part 4. If the contraction part 4 is blocked, the negative pressure output of the negative pressure generating device can be increased to keep the drainage tube 1 unobstructed.

[0045] The liquid collecting container includes a liquid collecting bottle 18, the surface of the liquid collecting bottle 18 is provided with scale lines, and the liquid collecting bottle 18 is provided with a pressure detection mechanism 19, and the pressure detection mechanism 19 is electrically connected to the controller 2. The negative pressure state inside the liquid collecting bottle 18 is easy to understand through the pressure detection mechanism 19, and the controller 2 further determines the blockage state of the drainage tube 1 in combination with the first pressure value, the second pressure value and the detection information of the pressure detection mechanism 19. A drainage pipe 20 is provided at the bottom of the liquid collecting bottle 18, and a drainage switch 21 is provided on the drainage pipe 20. If the liquid collecting bottle 18 is full of collected liquid, the drainage switch 21 can be turned on, and the liquid inside the liquid collecting bottle 18 can be discharged by using the drainage pipe 20, which does not affect the normal use of the liquid collecting bottle 18.

[0046] In this embodiment, the negative pressure generating device includes a negative pressure fan 6, a connecting pipe is provided between the negative pressure fan 6 and the liquid collecting container, and the negative pressure fan 6 is electrically connected to the controller 2. The controller 2 controls the output power of the negative pressure fan 6, thereby controlling the rotation speed of the negative pressure fan 6 to achieve negative pressure control of the liquid collecting container. When the drainage tube 1 is blocked, the negative pressure fan 6 increases the rotation speed, the negative pressure of the liquid collecting container increases, and the accumulated liquid enters the liquid collecting container smoothly; after the accumulated liquid flows normally, the negative pressure fan 6 reduces the rotation speed, the negative pressure of the liquid collecting container decreases, and the accumulated liquid enters the liquid collecting container normally. It should be noted that if the accumulated liquid can enter the liquid collecting container without negative pressure, the negative pressure fan 6 can be turned off to allow the accumulated liquid to enter the liquid collecting container under the action of gravity.

[0047] Specifically, the connecting pipe includes a first pipeline 7 and a second pipeline 8, a buffer container 9 is provided between the first pipeline 7 and the second pipeline 8, and the liquid collecting container, the first pipeline 7, the buffer container 9, the second pipeline 8 and the negative pressure fan 6 are connected in sequence. The first pipeline 7 is located at the top of the liquid collecting container, and the accumulated liquid will not enter the first pipeline 7. The buffer container 9 has a pressure stabilizing effect, which can reduce the internal pressure fluctuation of the liquid collecting container and prevent the sudden change of the pressure of the drainage tube 1 causing discomfort to the patient. The present invention utilizes the negative pressure fan 6 to generate negative pressure inside the liquid collecting container, and uses the buffer container 9 to stabilize the gas flow to prevent the negative pressure fan 6 from increasing the negative pressure output or reducing the negative pressure output when the internal pressure of the liquid collecting container changes sharply.

[0048] In this embodiment, the controller 2 is connected to a pressure comparison module 10, and the pressure comparison module 10 is used to compare the first pressure value and the second pressure value to obtain a pressure difference. The controller 2 controls the negative pressure fan 6 to increase or decrease the negative pressure output based on the pressure difference. The pressure comparison module 10 compares the pressure values ​​of the drainage end and the contraction part 4 to obtain the pressure difference between the drainage end and the contraction part 4. The controller 2 determines the blockage state of the drainage tube 1 based on the pressure difference, and then controls the negative pressure fan 6 to increase or decrease the negative pressure output to keep the drainage tube 1 unobstructed.

[0049] Preferably, the controller 2 is connected to an alarm module 11, and the alarm module 11 is used to issue different alarms based on the first pressure value, the second pressure value and the pressure difference. When different blockages occur in the drainage tube 1, the controller 2 controls the alarm module 11 to issue different alarms, which is convenient for medical staff to handle in time.

[0050] In this embodiment, the pleural effusion drainage device further includes a flushing tube 12, which is arranged along the drainage tube 1. A flushing head 13 is provided at one end of the flushing tube 12 close to the drainage end, and the other end of the flushing tube 12 extends to the outside of the drainage tube 1 and is connected to a flushing joint 14. The flushing tube 12 is inserted into the drainage tube 1, and the flushing head 13 is arranged on the inner side of the drainage tube 1. The flushing head 13 is provided with a liquid spraying arc surface, and a plurality of spray holes 15 are evenly distributed on the liquid spraying arc surface. Preferably, a one-way valve 16 is provided inside the flushing tube 12. A one-way valve 16 for only one-way flow of flushing liquid is provided at the front end of the flushing tube 12, which effectively prevents the effusion and blood accumulation in the pleural cavity from entering and contaminating the flushing tube 12 and causing retrograde infection of the drainage fluid. The effusion, blood accumulation and flushing liquid in the pleural cavity can be drained out through the drainage tube 1 under the action of negative pressure, which is conducive to the smooth recovery of the patient.

[0051] The present invention provides a flushing tube 12 separately, and the front end of the flushing tube 12 has a liquid spraying arc surface, and a plurality of spray holes 15 are evenly distributed on the liquid spraying arc surface, so that the patient's chest cavity can be flushed in multiple directions, and the flushing tube 12 can also be used to infuse drugs into the patient's chest cavity in the later stage of drainage, avoiding the problem of inserting a pipe for infusing drugs and increasing the patient's pain. The present invention can drain the effusion in the chest cavity through the drainage tube 1, and can flush the infectious chest cavity by inputting liquid through the flushing tube 12, which is convenient for the drainage of pleural effusion and the control of infection.

[0052] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. A pleural effusion drainage device for postoperative treatment, characterized in that: The invention comprises a drainage tube (1), a liquid collecting container, a negative pressure generating device and a controller (2); one end of the drainage tube (1) is connected to the liquid collecting container, the other end of the drainage tube (1) is provided with a drainage end, the inner side of the drainage end is provided with a first pressure sensor (3), and the first pressure sensor (3) is used to detect a first pressure value of the drainage end; a contraction portion (4) is provided on the drainage tube (1), the inner side of the contraction portion (4) is provided with a second pressure sensor (5), and the second pressure sensor (5) is used to detect a second pressure value of the contraction portion (4), and the second pressure sensor (5) and the first pressure sensor (3) are both electrically connected to the controller (2); the negative pressure generating device is connected to the liquid collecting container, and the negative pressure generating device is electrically connected to the controller (2); when the first pressure value or the second pressure value exceeds its threshold value, the controller (2) adjusts the working state of the negative pressure generating device to control the internal pressure of the liquid collecting container.

2. The pleural effusion drainage device for postoperative treatment according to claim 1, characterized in that: The negative pressure generating device comprises a negative pressure fan (6), a connecting pipe is provided between the negative pressure fan (6) and the liquid collecting container, and the negative pressure fan (6) is electrically connected to the controller (2).

3. The pleural effusion drainage device for postoperative treatment according to claim 2, characterized in that: The connecting pipe comprises a first pipeline (7) and a second pipeline (8), a buffer container (9) is provided between the first pipeline (7) and the second pipeline (8), and the liquid collecting container, the first pipeline (7), the buffer container (9), the second pipeline (8) and the negative pressure fan (6) are connected in sequence.

4. The pleural effusion drainage device for postoperative treatment according to claim 2, characterized in that: The controller (2) is connected to a pressure comparison module (10), and the pressure comparison module (10) is used to compare the first pressure value and the second pressure value to obtain a pressure difference. The controller (2) controls the negative pressure fan (6) based on the pressure difference to respond by increasing the negative pressure output or reducing the negative pressure output.

5. The pleural effusion drainage device for postoperative treatment according to claim 4, characterized in that: The controller (2) is connected to an alarm module (11), and the alarm module (11) is used to issue different alarms based on the first pressure value, the second pressure value, and the pressure difference value.

6. The pleural effusion drainage device for postoperative treatment according to claim 1, characterized in that: It also comprises a flushing tube (12), which is arranged along the drainage tube (1), and a flushing head (13) is provided at one end of the flushing tube (12) close to the drainage end, and the other end of the flushing tube (12) extends to the outside of the drainage tube (1) and is connected to a flushing connector (14).

7. The pleural effusion drainage device for postoperative treatment according to claim 6, characterized in that: The flushing tube (12) is inserted into the drainage tube (1), and the flushing head (13) is arranged on the inner side of the drainage tube (1); a one-way valve (16) is arranged inside the flushing tube (12).

8. The pleural effusion drainage device for postoperative treatment according to claim 6, characterized in that: The flushing head (13) is provided with a liquid spraying arc surface, and a plurality of spray holes (15) are evenly distributed on the liquid spraying arc surface.

9. The pleural effusion drainage device for postoperative treatment according to claim 1, characterized in that: The drainage tube (1) is provided with a drainage switch (17).

10. The pleural effusion drainage device for postoperative treatment according to claim 1, characterized in that: The liquid collecting container comprises a liquid collecting bottle (18), the surface of the liquid collecting bottle (18) is provided with scale lines, the liquid collecting bottle (18) is provided with a pressure detection mechanism (19), and the pressure detection mechanism (19) is electrically connected to the controller (2); the bottom of the liquid collecting bottle (18) is provided with a liquid discharge pipe (20), and the liquid discharge pipe (20) is provided with a liquid discharge switch (21).

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