Negative pressure drainage tension reducing device
By designing a negative pressure drainage and tension reduction device, independent control and pressure monitoring of negative pressure drainage and tension reduction were achieved, solving the problem that existing devices cannot be used simultaneously, improving the portability and safety of the device, and promoting wound healing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG BAINUS MEDICAL INSTR
- Filing Date
- 2025-04-02
- Publication Date
- 2026-05-12
AI Technical Summary
Existing negative pressure drainage devices and negative pressure tension reduction devices need to be used separately, which is inconvenient to carry and cannot perform negative pressure drainage and negative pressure tension reduction at the same time. They also lack independent control and pressure monitoring functions.
A negative pressure drainage and tension reduction device was designed, comprising a control chamber and a drainage bottle, with a built-in micro vacuum pump, control main board and connecting pipeline, to achieve independent control of negative pressure drainage and negative pressure tension reduction, and to monitor and automatically adjust pressure through solenoid valves and pressure sensors.
实现了负压引流和负压减张的独立运行和压力控制，具备便携性，并能在压力异常时泄压，提供实时监测和自动化调整，提高了手术后的创口愈合安全性。
Smart Images
Figure CN224220489U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, and specifically relates to a negative pressure drainage and tension reduction device. Background Technology
[0002] In traumatic surgical treatment, timely cleaning and drainage of wound exudate and effusion, as well as the alignment and flatness of the wound and the reduction of tension, play an important role in protecting the wound and ensuring its smooth healing after surgery.
[0003] If bruising and fluid accumulation form at the surgical site, the significant retention of these substances can lead to wound infection, inflammation, and other adverse symptoms. To avoid these issues, drainage is frequently performed at the surgical site during surgery. Furthermore, smoothing and aligning the surgical wound to reduce tension on both sides, and applying negative pressure to reduce tension, can lower the risk of wound dehiscence due to patient activity, preventing the formation of new wounds and improving surgical safety.
[0004] However, existing negative pressure drainage devices and negative pressure tension reduction devices need to be used separately, which is inconvenient to carry. Therefore, there is an urgent need for a device that can perform negative pressure drainage and negative pressure tension reduction simultaneously, can independently control negative pressure drainage and negative pressure tension reduction, and is easy to carry. Summary of the Invention
[0005] To address the aforementioned technical problems in the existing technology, this utility model provides a negative pressure drainage and tension reduction device. The technical solution adopted by this utility model is as follows:
[0006] A negative pressure drainage and tension reduction device includes a control chamber and a drainage bottle that are isolated from each other. The drainage bottle has a sealed structure. A miniature vacuum pump, a control main board, and connecting pipes are installed in the control chamber. An operation panel is provided on the outer shell of the control chamber. The operation panel has a negative pressure drainage pipe interface and a negative pressure tension reduction pipe interface. The connecting pipes include a negative pressure drainage pipe, a negative pressure tension reduction pipe, a first suction pipe, a second suction pipe, a first pressure measuring pipe, and a second pressure measuring pipe. One end of the negative pressure drainage pipe is sealed and connected to the inside of the drainage bottle, and the other end is sealed and connected to the negative pressure drainage pipe interface. One end of the first suction pipe is sealed and connected to the inside of the drainage bottle, and the other end is sealed and connected to one end of a second solenoid valve. The other end of the second solenoid valve is sealed and connected to the first interface of a four-way connector. The second interface is sealed and connected to one end of the first solenoid valve, while the other end of the first solenoid valve is suspended. The third interface of the four-way connector is sealed and connected to the suction nozzle of the micro vacuum pump via the second air extraction pipeline. The fourth interface of the four-way connector is sealed and connected to one end of the third solenoid valve. The other end of the third solenoid valve is sealed and connected to one end of the negative pressure reducing pipeline. The other end of the negative pressure reducing pipeline is sealed and connected to the interface of the negative pressure reducing pipeline. The negative pressure reducing pipeline is also sealed and connected to one end of the second pressure measuring pipeline. The other end of the second pressure measuring pipeline is sealed and a second pressure sensor is installed. One end of the first pressure measuring pipeline is sealed and connected to the inside of the drainage bottle. The other end of the first pressure measuring pipeline is sealed and a first pressure sensor is installed. The micro vacuum pump, the first pressure sensor, the second pressure sensor, the first solenoid valve, the second solenoid valve, and the third solenoid valve are all electrically connected to the control main board.
[0007] Preferably, a power supply is provided in the control cabin, and the power supply is electrically connected to the control motherboard.
[0008] Preferably, the operation panel is equipped with a negative pressure reduction indicator light, a display screen, a negative pressure drainage indicator light, a pressure relief button, an increase button, a decrease button, a switch button, and a power button. The power button, display screen, negative pressure drainage indicator light, negative pressure reduction indicator light, switch button, decrease button, increase button, and pressure relief button are all electrically connected to the control motherboard.
[0009] Preferably, one end of the negative pressure drainage pipe extends into the drainage bottle and is equipped with a one-way valve.
[0010] Preferably, one end of the negative pressure drainage connection tube is sealed and connected to the negative pressure drainage pipeline interface, and the first Robert clamp is installed on the negative pressure drainage connection tube.
[0011] Preferably, one end of the negative pressure tension reducing connecting pipe is sealed and connected to the negative pressure tension reducing pipeline interface, and the second Robert clamp is installed on the negative pressure tension reducing connecting pipe.
[0012] Preferably, the other end of the negative pressure tension reducing connecting tube is sealed and connected to one end of the first flushing and drainage connecting tube, the other end of the first flushing and drainage connecting tube is connected to the inside of the flushing and drainage bottle, and the flushing and drainage bottle is sealed and connected to one end of the second flushing and drainage connecting tube.
[0013] Preferably, a third Robert clamp is provided on the second flushing drainage connection tube.
[0014] The beneficial technical effects of this utility model are as follows:
[0015] 1) By setting up a miniature vacuum pump, negative pressure reduction pipeline and air extraction pipeline inside the drainage bottle, and correspondingly setting up solenoid valves, the independent operation of negative pressure drainage and negative pressure reduction and the independent control of pressure are realized.
[0016] 2) Pressure relief lines are installed for the corresponding negative pressure reducing pipeline and the air extraction pipeline, which can relieve pressure when the pressure of the drainage bottle and the negative pressure reducing pipeline is abnormal or changes suddenly.
[0017] 3) The internal control board is connected to the pressure measurement pipeline, which can monitor the pressure of negative pressure reduction and negative pressure drainage in real time, making it easy to control the pressure;
[0018] 4) The control system integrated on the main board can automatically adjust the pressure of negative pressure drainage and negative pressure reduction after the preset pressure. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the internal structure of the control cabin in Embodiment 1 of this utility model;
[0020] Figure 2 This is a schematic diagram of the operation panel of Embodiment 1 of the present utility model;
[0021] Figure 3 This is a schematic diagram showing the connection between the negative pressure drainage connecting pipe and the negative pressure tension reducing connecting pipe in Embodiment 1 of this utility model;
[0022] Figure 4 This is a schematic diagram showing the connection between the drainage bottle and the rinsing drainage bottle in Embodiment 2 of this utility model;
[0023] Figure 1 In the middle: 100-Control compartment, 101-Negative pressure drainage pipeline, 102-First solenoid valve, 103-Second solenoid valve, 104-Evacuation pipeline one, 105-Miniature vacuum pump, 106-First pressure measurement pipeline, 107-Control main board, 108-Power supply, 109-Second pressure measurement pipeline, 110-Negative pressure tension reduction pipeline, 111-Third solenoid valve, 112-Evacuation pipeline two;
[0024] Figure 2In the middle: 201-Display screen, 202-Negative pressure drainage pipeline interface, 203-Negative pressure drainage indicator light, 204-Power button, 205-Switch button, 206-Decrease button, 207-Increase button, 208-Pressure relief button, 209-Negative pressure reduction indicator light, 210-Negative pressure reduction pipeline interface;
[0025] Figure 3 In the middle: 301-First Robert clamp, 302-Negative pressure drainage connection tube, 303-One-way valve, 304-Drainage bottle, 305-Negative pressure tension reduction connection tube, 306-Second Robert clamp;
[0026] Figure 4 In the middle: 401-First flushing and drainage connection tube, 402-Flushing and drainage bottle, 403-Third Robert clamp, 404-Second flushing and drainage connection tube. Detailed Implementation
[0027] The technical solution of this utility model will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the technical solution of this utility model in more detail and should not be construed as limiting the scope of protection of this utility model. Example 1
[0028] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a negative pressure drainage and tension reduction device, including a device bottle with an internal hollow structure. The device bottle includes an upper control chamber 100 and a lower drainage bottle 304. The control chamber 100 and the drainage bottle 304 are isolated from each other. The drainage bottle 304 has a sealed structure, while the control chamber 100 has a non-sealed structure. The mounting and mating positions of the components on the outer shell of the control chamber 100 do not need to be sealed. A miniature vacuum pump 105, a power supply 108, a control main board 107, and connecting pipes are fixedly installed in the control chamber 100. The control main board 107 is electrically connected to the miniature vacuum pump 105, a first pressure sensor, and a second pressure sensor.
[0029] The connecting pipeline includes: a negative pressure drainage pipeline 101, a negative pressure tension reduction pipeline 110, a first suction pipeline 104, a second suction pipeline 112, a first pressure measuring pipeline 106, and a second pressure measuring pipeline 109. One end of the negative pressure drainage pipeline 101 is sealed and connected to the inside of the drainage bottle 304. One end of the negative pressure drainage pipeline 101 extends into the inside of the drainage bottle 304 for a certain length and is equipped with a one-way valve 303. The one-way valve 303 can prevent the body fluid in the drainage bottle 304 from flowing into the control chamber 100 when the device is tilted. The other end of the negative pressure drainage pipeline 101 is sealed and connected to the negative pressure drainage pipeline interface 202 located on the operation panel on the outer shell of the control chamber 100. One end of the suction pipe 104 is sealed and connected to the inside of the drainage bottle 304. The other end of the suction pipe 104 is sealed and connected to one end of the second solenoid valve 103. The other end of the second solenoid valve 103 is sealed and connected to the first interface of the four-way connector. The second interface of the four-way connector is sealed and connected to one end of the first solenoid valve 102. The other end of the first solenoid valve 102 is suspended. The third interface of the four-way connector is sealed and connected to the suction nozzle of the micro vacuum pump 105 via the second suction pipe 112. The fourth interface of the four-way connector is sealed and connected to one end of the third solenoid valve 111. The other end of the third solenoid valve 111 is sealed and connected to one end of the negative pressure reducing pipe 110. The other end of the negative pressure reducing pipe 110 is sealed and connected to the negative pressure reducing pipe interface 210 located on the operation panel on the outer shell of the control cabin 100. The negative pressure reducing pipe 110 is also sealed and connected to one end of the second pressure measuring pipe 109. The other end of the second pressure measuring pipe 109 is sealed and equipped with a second pressure sensor. One end of the first pressure measuring tube 106 is sealed and connected to the inside of the drainage bottle 304, and the other end of the first pressure measuring tube 106 is sealed and equipped with a first pressure sensor. The power supply 108 is electrically connected to the control motherboard 107, and the power supply 108 supplies power to the control motherboard 107. The miniature vacuum pump 105 is electrically connected to the control motherboard 107, and the power supply 108 supplies power to the miniature vacuum pump 105 through the control motherboard 107.
[0030] A portion of the outer shell of the control chamber 100 serves as an operation panel. Besides a negative pressure drainage pipe interface 202 and a negative pressure tension reduction pipe interface 210 on one side, the operation panel also features a negative pressure tension reduction indicator light 209, a display screen 201, and a negative pressure drainage indicator light 203 arranged sequentially in the center. On the other side of the operation panel, a pressure relief button 208, an increase button 207, a decrease button 206, a switch button 205, and a power button 204 are arranged sequentially. The power button 204 is electrically connected to the control motherboard 107. The display screen 201, negative pressure drainage indicator light 203, negative pressure tension reduction indicator light 209, switch button 205, decrease button 206, increase button 207, and pressure relief button 208 are all electrically connected to the control motherboard 107. The first solenoid valve 102, the second solenoid valve 103, and the third solenoid valve 111 are all electrically connected to the control motherboard 107. The control motherboard 107 connects to and controls the solenoid valves via a wired connection.
[0031] One end of the negative pressure drainage connecting pipe 302 is sealed and connected to the negative pressure drainage pipeline interface 202, and the first Robert clamp 301 is installed on the negative pressure drainage connecting pipe 302. One end of the negative pressure tension reducing connecting pipe 305 is sealed and connected to the negative pressure tension reducing pipeline interface 210, and the second Robert clamp 306 is installed on the negative pressure tension reducing connecting pipe 305.
[0032] The control motherboard 107 is equipped with a control chip, which is used to store preset pressure values and start-up thresholds, drive the display screen 201, detect buttons, receive sensor inputs, and control indicator lights, solenoid valves and miniature vacuum pump 105.
[0033] The working principle and usage of the negative pressure drainage and tension reduction device provided in Embodiment 1 of this utility model are as follows:
[0034] The Robert clamp serves to shut off the tubing. After connecting the tubing, first ensure the tubing is properly sealed, then close the Robert clamp, and then press and hold the power button 204 to turn on the device. After powering on, the user can set the negative pressure value and start-up threshold through the operation panel. Pressing and holding or shorting the plus button 207 increases the set negative pressure value, and pressing and holding or shorting the minus button 206 decreases the set negative pressure value. Shorting the power button 204 saves the set negative pressure value. By shorting the switch button 205, the user can switch between the preset negative pressure reduction tubing 110 pressure and the preset negative pressure drainage tubing 101 pressure (i.e., the drainage bottle 304 pressure). The negative pressure reduction tubing 110 pressure and the negative pressure drainage tubing 101 pressure can be set separately, and can be equal or unequal.
[0035] After power-on, the first pressure sensor automatically detects the pressure value of the first pressure measuring line 106 (i.e., the current pressure of the drainage bottle 304) and sends it to the control main board 107. The second pressure sensor automatically detects the pressure value of the second pressure measuring line 109 (i.e., the current pressure of the negative pressure reducing line 110) and sends it to the control main board 107. If the pressure value of the first pressure measuring line 106 (in this embodiment, the description of the negative pressure refers to the absolute value of the negative pressure; the higher the negative pressure, the larger its absolute value) is lower than the preset start-up threshold, the control main board 107 drives the second solenoid valve 103 corresponding to the drainage bottle 304 to open, and then the control main board 107 controls the micro vacuum pump 105 to start pumping air, while other corresponding solenoid valves are normally closed by default. Alternatively, if the pressure value of the second pressure measuring line 109 is lower than the preset start-up threshold, the third solenoid valve 111 corresponding to the negative pressure reducing line 110 is opened, and then the control main board 107 controls the micro vacuum pump 105 to start pumping air, while other corresponding solenoid valves are normally closed by default. When the current pressure is detected to have reached the preset pressure value, the control motherboard 107 controls the miniature vacuum pump 105 to stop pumping. Based on this principle, the pressure in the connecting pipeline can be controlled to remain within the range defined by the start-up threshold and the preset pressure value.
[0036] The device in this embodiment provides two negative pressure channels, one for drainage and the other for tension reduction. Application scenarios include using both channels simultaneously or using only one channel.
[0037] The negative pressure drainage tube 101 is used to suction subcutaneous fluids (tissue fluid, pus, blood, etc.) from a wound using negative pressure. As the fluid is drawn into the drainage bottle 304, the fluid volume increases, the air volume inside the bottle 304 is compressed, and the negative pressure decreases accordingly. Therefore, to achieve continuous drainage, the control principle of the negative pressure drainage tube 101 is as follows: when the negative pressure inside the drainage bottle 304 drops to the activation threshold, the second solenoid valve 103 is activated, and the micro vacuum pump 102 is activated to pump air until the negative pressure inside the drainage bottle 304 reaches the preset pressure value again. This maintains the negative pressure inside the drainage bottle 304 within the range of [activation threshold, preset pressure value]. The preset pressure value can be set within the range of -5 to -50 kPa, and the activation threshold has three gradients.
[0038] Preset pressure value -5~-19kPa -20~-39kPa -40~-50kPa Startup threshold -3kPa -10kPa -30kPa
[0039] There are two application scenarios for negative pressure tension reduction pipelines: one is for negative pressure tension reduction, and the other is for wound irrigation and drainage as in Example 2.
[0040] When used for negative pressure tension reduction, the entire negative pressure tension reduction pipeline 110 remains airtight and leak-free, providing a constant negative pressure to the wound. The negative pressure usually does not change during the tension reduction process. The connection between the negative pressure tension reduction connecting pipe 305 and the wound is achieved by another device (tentatively called a dressing device) applied to the wound surface, covering the entire wound, and a connection port is provided for connection with the negative pressure tension reduction connecting pipe 305.
[0041] When only one of the pipelines is used, the Robert clamp on the other pipeline must be closed. The negative pressure tension reducing pipeline interface 210 and the negative pressure drainage pipeline interface 202 can be Luer connectors, which are connected to the negative pressure tension reducing connecting pipe 305 and the negative pressure drainage connecting pipe 302 respectively via Luer connectors. If only one of the pipelines is used, the unused connection ports of the negative pressure tension reducing pipeline interface 210 and the negative pressure drainage pipeline interface 202 are sealed with Luer connector caps.
[0042] Once the air pressure reaches the preset pressure, open the Robert clamp to instantly generate sufficient negative pressure at the wound and drainage site, providing suction. If the tubing is connected, open the Robert clamp, then perform the power-on, set the preset pressure, and start the suction procedure, the negative pressure at the wound and drainage site will slowly increase. These two methods produce different effects.
[0043] When the current pressure of one of the channels reaches its preset pressure value, the control board 107 closes its corresponding solenoid valve, stopping the pumping of that channel. When the other channel reaches its preset pressure, the control board 107 closes its corresponding solenoid valve and shuts down the miniature vacuum pump 105, stopping the pumping.
[0044] The negative pressure tension reduction pipeline indicator light 209 and the negative pressure drainage pipeline indicator light 203 will flash rapidly when either pipeline is evacuated, and will flash slowly after the preset pressure value is reached.
[0045] When an emergency pressure relief is required due to a sudden abnormality, press the pressure relief button 208. The control board 107 will control the first solenoid valve 102 to open, and the negative pressure drainage pipeline 101 and the negative pressure tension reduction pipeline 110 will release pressure rapidly at the same time.
[0046] To shut down, press and hold the power button (204).
[0047] The display screen 201 is used to display the negative pressure drainage pressure and the negative pressure tension reduction pressure.
[0048] With negative pressure suction, body fluids flow into the drainage bottle 304; with negative pressure tension reduction, the wound is placed in a set negative pressure environment to achieve the purpose of tension reduction and suppress wound tension. Example 2
[0049] Furthermore, the negative pressure drainage and tension reduction device described in Embodiment 1, wherein the negative pressure tension reduction connecting pipe 305 can also be applied to wound irrigation and drainage. Wound irrigation and drainage refers to rinsing the wound with a disinfectant liquid while simultaneously drawing the waste liquid generated during wound irrigation into the irrigation and drainage bottle 402 under negative pressure. Figure 4 As shown, the other end of the negative pressure tension reducing connecting pipe 305 is sealed and connected to one end of the first flushing and drainage connecting pipe 401. The other end of the first flushing and drainage connecting pipe 401 is connected to the inside of the flushing and drainage bottle 402. The flushing and drainage bottle 402 is also sealed and connected to one end of the second flushing and drainage connecting pipe 404. The second flushing and drainage connecting pipe 404 is provided with a third Robert clamp 403.
[0050] The steps for wound irrigation and drainage are as follows:
[0051] Close the third Robert clamp 403 and press and hold the power button 204 to turn on the device. After turning on the device, follow the same steps as controlling the pressure value in Embodiment 1. When the current pressure in the irrigation drainage bottle 402 reaches the preset pressure value, connect the other end of the second irrigation drainage connecting tube 404 to the application site. The application site for irrigation drainage is the reserved connection point for rinsing the wound with irrigation fluid. Turn on the third Robert clamp 403 to perform wound irrigation drainage. At this time, the pressure control in the irrigation drainage bottle 402 is the same as the pressure control method in Embodiment 1.
[0052] When used for wound irrigation, the dressing device has a reserved irrigation connection port. The irrigation fluid enters from the irrigation connection port and generates negative pressure through the negative pressure reducing pipe 110. The irrigation fluid is then drawn out by the second irrigation drainage connection pipe 404 into the irrigation drainage bottle 402. The control principle is the same as in Embodiment 1, but the start threshold is different from that in Embodiment 1. The preset pressure value can be set in the range of -5 to -50 kPa, and the start threshold is set to -3 kPa.
[0053] In this embodiment of the utility model, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.
[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the spirit and principle of the present invention without any creative effort should be included within the protection scope of the present invention.
Claims
1. A negative pressure drainage and tension reduction device, comprising a control chamber and a drainage bottle isolated from each other, wherein the drainage bottle is a sealed structure, characterized in that, The control chamber houses a miniature vacuum pump, a control motherboard, and connecting pipes. An operation panel is mounted on the outer shell of the control chamber, featuring interfaces for a negative pressure drainage pipe and a negative pressure tension reduction pipe. The connecting pipes include a negative pressure drainage pipe, a negative pressure tension reduction pipe, a first suction pipe, a second suction pipe, a first pressure measuring pipe, and a second pressure measuring pipe. One end of the negative pressure drainage pipe is sealed and connected to the inside of the drainage bottle, while the other end is sealed and connected to the negative pressure drainage pipe interface. One end of the first suction pipe is sealed and connected to the inside of the drainage bottle, while the other end is sealed and connected to one end of a second solenoid valve. The other end of the second solenoid valve is sealed and connected to the first interface of a four-way connector. The second interface of the four-way connector is sealed and connected to one end of the first solenoid valve. The other end of the solenoid valve is suspended. The third interface of the four-way connector is sealed and connected to the suction nozzle of the micro vacuum pump via the second sealed suction pipe. The fourth interface of the four-way connector is sealed and connected to one end of the third solenoid valve. The other end of the third solenoid valve is sealed and connected to one end of the negative pressure reducing pipe. The other end of the negative pressure reducing pipe is sealed and connected to the interface of the negative pressure reducing pipe. The negative pressure reducing pipe is also sealed and connected to one end of the second pressure measuring pipe. The other end of the second pressure measuring pipe is sealed and a second pressure sensor is installed. One end of the first pressure measuring pipe is sealed and connected to the inside of the drainage bottle. The other end of the first pressure measuring pipe is sealed and a first pressure sensor is installed. The micro vacuum pump, the first pressure sensor, the second pressure sensor, the first solenoid valve, the second solenoid valve, and the third solenoid valve are all electrically connected to the control main board.
2. The negative pressure drainage and tension reduction device according to claim 1, characterized in that, A power supply is installed in the control cabin, and the power supply is electrically connected to the control motherboard.
3. The negative pressure drainage and tension reduction device according to claim 2, characterized in that, The operation panel is equipped with a negative pressure reduction indicator light, a display screen, a negative pressure drainage indicator light, a pressure relief button, an increase button, a decrease button, a switch button, and a power button. The power button, display screen, negative pressure drainage indicator light, negative pressure reduction indicator light, switch button, decrease button, increase button, and pressure relief button are all electrically connected to the control motherboard.
4. The negative pressure drainage and tension reduction device according to claim 1, characterized in that, One end of the negative pressure drainage pipeline extends into the drainage bottle and is equipped with a one-way valve.
5. The negative pressure drainage and tension reduction device according to claim 1, characterized in that, One end of the negative pressure drainage connection tube is sealed and connected to the negative pressure drainage pipeline interface, and the first Robert clamp is installed on the negative pressure drainage connection tube.
6. The negative pressure drainage and tension reduction device according to claim 1, characterized in that, One end of the negative pressure tension reducing connecting pipe is sealed and connected to the negative pressure tension reducing pipeline interface, and the second Robert clamp is installed on the negative pressure tension reducing connecting pipe.
7. The negative pressure drainage and tension reduction device according to claim 6, characterized in that, The other end of the negative pressure tension reducing connecting tube is sealed and connected to one end of the first flushing and drainage connecting tube, the other end of the first flushing and drainage connecting tube is connected to the inside of the flushing and drainage bottle, and the flushing and drainage bottle is sealed and connected to one end of the second flushing and drainage connecting tube.
8. The negative pressure drainage and tension reduction device according to claim 7, characterized in that, A third Robert clamp is installed on the second flushing and drainage connection tube.