Intelligent chest negative pressure drainage device

Abstract

The present application relates to a kind of intelligent chest negative pressure drainage device, including electronic negative pressure device and chest closed drainage bottle;Electronic negative pressure device is equipped with negative pressure component;Negative pressure component includes: negative pressure pipe;Negative pressure connector;Negative pressure pump;And check valve;Wherein, electronic negative pressure device power consumption realizes active negative pressure mode;Electronic negative pressure device power consumption realizes chest closed drainage mode when power is exhausted.Through the combination of mechanical structure and electronic control, with " active negative pressure " and " chest closed drainage " two working modes, realize active negative pressure mode when power is normal;When power interruption or system failure, automatically, seamless switch to water seal drainage mode without power, switching process is based on mechanical characteristics, without manual intervention, greatly improve clinical safety, completely solve the failure risk of electronic system when power off.Combination water seal liquid physical barrier and check valve structure, form double anti-reflux protection, can effectively prevent gas or liquid reflux.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an intelligent thoracic negative pressure drainage device. Background Technology

[0002] Currently, the main types of chest drainage devices used in clinical practice are: traditional water-seal bottle drainage, closed chest negative pressure drainage, and digital chest negative pressure drainage devices. Their working principles and existing defects are as follows: Traditional water-seal bottle drainage: The drainage tube is connected to a water-seal bottle, where sterile water forms a liquid seal. These are typically single-chamber, double-chamber, or triple-chamber bottles. A single-chamber bottle contains only one drainage chamber; a double-chamber bottle includes both a drainage chamber and a water-seal chamber, relying on the water seal fluid and gravity for drainage and to prevent gas backflow; a triple-chamber bottle adds a pressure regulating chamber, setting the negative pressure through the water column depth and connecting to an external negative pressure suction source. This system is technically mature and reliable, and is currently the most widely used in clinical practice. The drawback of this device is its over-reliance on the gravity principle of the water-seal bottle for drainage, resulting in relatively low drainage efficiency, especially for patients with persistent gas leakage or large amounts of fluid accumulation.

[0003] Closed-loop negative pressure pleural drainage system: A water-seal bottle drainage system is connected to a central negative pressure suction system in the hospital, with a negative pressure regulator precisely set to the required negative pressure value. It actively creates a stable negative pressure through mechanical means, accelerating the drainage of pleural effusion and pneumothorax. The drawbacks of this system are that while the central negative pressure suction system in the hospital can provide active drainage, the equipment is large and cumbersome, restricting early patient ambulation and hindering recovery; the negative pressure value is fixed and cannot be adjusted independently.

[0004] Digital negative pressure pleural drainage device: This device uses dry-seal drainage, with a built-in negative pressure pump and precision mechanical valve. It autonomously adjusts the pleural negative pressure by setting the negative pressure value and can record drainage volume and leakage in real time. The main unit is relatively compact. The drawbacks of this device are its reliance on electricity. Once the battery is depleted or the electronic system malfunctions, its core negative pressure generation and one-way valve functions disappear, and the entire drainage system becomes completely ineffective. It cannot maintain basic drainage and anti-reflux functions, nor can it automatically switch to water-seal bottle drainage, posing a higher clinical safety risk. The entire system is also relatively heavy, making it inconvenient for patients to carry. Furthermore, the device cost is higher than traditional water-seal bottles. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent thoracic negative pressure drainage device that innovatively integrates an electronic negative pressure device with a closed thoracic drainage bottle to form a hybrid device with both active negative pressure drainage and gravity drainage modes.

[0006] This invention is achieved through the following technical solution: An intelligent chest cavity negative pressure drainage device includes an electronic negative pressure device and a closed chest cavity drainage bottle; the closed chest cavity drainage bottle is provided with a drainage end tube and a negative pressure end tube; the drainage end tube is used to connect to the patient's chest cavity; the electronic negative pressure device is provided with a negative pressure component, and the negative pressure end tube is connected to the electronic negative pressure device through the negative pressure component; The negative pressure component includes: Negative pressure pipe serves as a gas guide channel; The negative pressure connector has one end connected to the beginning of the negative pressure pipe, and the other end extends out to connect to the electronic negative pressure device and the negative pressure end pipeline. The negative pressure pump has one end connected to the tail end of the negative pressure pipe as the intake end, and the other end connected to the atmosphere as the exhaust end; and A one-way valve is connected to the section of the negative pressure pipe leading to the negative pressure pump. The electronic negative pressure device achieves active negative pressure mode when powered. In this mode, the airflow inside the closed chest drainage bottle flows from the negative pressure tube toward the negative pressure pump and is discharged to the atmosphere, creating negative pressure inside the closed chest drainage bottle. When the electronic negative pressure device runs out of power, it achieves closed chest drainage mode. In this mode, when the patient exhales or coughs, positive pressure is created in the chest cavity; allowing airflow in the closed chest drainage bottle to flow from the negative pressure tube towards the negative pressure pump and out to the atmosphere; and when the patient inhales, negative pressure is created in the chest cavity; reducing the air pressure in the closed chest drainage bottle, and a one-way valve prevents air from the atmosphere from flowing back into the closed chest drainage bottle through the negative pressure tube, thus creating a slight negative pressure in the closed chest drainage bottle; combined with gravity, negative pressure drainage of the chest cavity is achieved.

[0007] Compared with previous technologies, the beneficial effects of the present invention are as follows: 1. This invention combines mechanical structure with electronic control, and has two working modes: "active negative pressure" and "closed chest drainage". When the power is normal, it realizes the active negative pressure mode; when the power is interrupted or the system fails, it automatically and seamlessly switches to the water seal drainage mode that does not require power. The switching process is based on mechanical characteristics and does not require manual intervention, which greatly improves clinical safety and completely solves the risk of failure of electronic system when power is off.

[0008] 2. Combining the physical barrier of the water seal fluid and the one-way valve structure, a double anti-backflow protection is formed, which can effectively prevent gas or liquid backflow.

[0009] 3. Compared with traditional water column pressure regulation or central negative pressure systems, electronic control provides a more stable and precisely adjustable negative pressure output to meet different clinical needs.

[0010] 4. Compared with digital drainage devices, this invention has the advantages of compact structure, simplicity, small size, light weight, high reliability, low cost and low noise operation. It supports patients to get out of bed, increases patients' willingness to use it, promotes postoperative recovery, and can also improve the medical environment. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating the connection between an electronic negative pressure device and a closed chest drainage bottle. Figure 2 This is a diagram showing the external structure of an electronic negative pressure device. Figure 3 This is a diagram showing the internal structure of an electronic negative pressure device. Figure 4 This is a structural diagram of the protective cover for an electronic negative pressure device. Figure 5 This is a flowchart illustrating the working logic of the present invention.

[0012] Labeling Explanation: 1 Electronic negative pressure device, 11 PCBA board, 12 Tactile switch, 13 Negative pressure level indicator light, 14 Pressure sensor, 15 Buzzer, 161 Negative pressure tube, 162 Negative pressure connector, 163 Negative pressure pump, 164 Pressure measuring tube, 165 One-way valve, 171 Battery, 172 Power indicator light, 181 Protective cover, 182 Button, 183 Negative pressure window area, 184 Power window area, 2 Closed chest drainage bottle, 21 Drainage end tubing, 22 Negative pressure end tubing, 23 Drainage effusion chamber, 24 Water seal chamber. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description: like Figures 1 to 5 As shown, an intelligent chest cavity negative pressure drainage device includes an electronic negative pressure device 1 and a closed chest cavity drainage bottle 2; the closed chest cavity drainage bottle 2 is provided with a drainage end tube 21 and a negative pressure end tube 22; the drainage end tube 21 is used to connect to the patient's chest cavity; the electronic negative pressure device 1 is provided with a negative pressure component, and the negative pressure end tube 22 is connected to the electronic negative pressure device 1 through the negative pressure component; The negative pressure component includes: Negative pressure pipe 161 serves as a gas guide channel; The negative pressure connector 162 has one end connected to the beginning of the negative pressure pipe 161, and the other end passes through the electronic negative pressure device 1 and connects to the negative pressure end pipe 22. The negative pressure pump 163 has one end connected to the tail end of the negative pressure pipe 161 as the intake end, and the other end connected to the atmosphere as the exhaust end; and One-way valve 165 is connected to the section of the negative pressure pipe 161 that leads to the negative pressure pump 163; The electronic negative pressure device 1 achieves active negative pressure mode when powered. In this mode, the airflow in the closed thoracic drainage bottle 2 flows from the negative pressure tube 161 toward the negative pressure pump 163 and is discharged to the atmosphere, so that negative pressure is formed in the closed thoracic drainage bottle 2. When the electronic negative pressure device 1 runs out of power, it achieves closed chest drainage mode. In this mode, when the patient exhales or coughs, positive pressure is created in the chest cavity; allowing airflow in the closed chest drainage bottle 2 to flow from the negative pressure tube 161 towards the negative pressure pump 163 and out to the atmosphere; and when the patient inhales, negative pressure is created in the chest cavity; reducing the air pressure in the closed chest drainage bottle 2, and a one-way valve prevents air from the atmosphere from flowing back into the closed chest drainage bottle 2 through the negative pressure tube 161, thus creating a slight negative pressure in the closed chest drainage bottle 2; combined with gravity, negative pressure drainage of the chest cavity is achieved.

[0014] This invention combines mechanical structure with electronic control, providing two working modes: "active negative pressure" and "closed chest drainage." When power is normal, it achieves the active negative pressure mode; when power is interrupted or the system fails, it automatically and seamlessly switches to the power-free water seal drainage mode. The switching process is based on mechanical characteristics and requires no manual intervention, greatly improving clinical safety and completely eliminating the risk of electronic system failure during power outages.

[0015] Furthermore, the electronic negative pressure device 1 includes: The control box, as the main body of the device, is installed on the side of the closed thoracic drainage bottle 2, and the negative pressure component is located inside the control box; PCBA board 11 is integrated inside the control box; A tactile switch 12 is mounted on the control box and connected to the PCBA board 11. It is used to start the negative pressure, switch the negative pressure level, or turn off the negative pressure. The negative pressure level indicator light 13 is installed on the control box and connected to the PCBA board 11 to display the negative pressure level. Pressure sensor 14 is mounted on the control box and connected to PCBA board 11 to monitor the air pressure inside the closed thoracic drainage bottle 2 in real time. Pressure sensing tube 164, located inside the control box, has one end for sensing the pressure of negative pressure tube 161 and the other end connected to pressure sensor 14; and Battery 171 is located inside the control box and is connected to PCBA board 11; In addition, the control box is equipped with a power indicator light 172 for displaying the power level of the battery 171, and the power indicator light 172 is connected to the PCBA board 11; The electronic negative pressure device 1 also includes a protective cover 181, which is detachably connected to the control box; The protective cover 181 is provided with a button 182, which corresponds to the position of the tactile switch 12 of the control box; the protective cover 181 is also provided with an observation window, which includes a negative pressure window area 183 and a power window area 184. The negative pressure window area 183 corresponds to the negative pressure gear indicator light 13; The power window area 184 corresponds to the power indicator light 172.

[0016] It should be noted that the control box is attached to the side of the closed thoracic drainage bottle 2 using adhesive. The PCBA board 11 contains major electronic components such as the main control chip, motor drive, and power management. The software system of the intelligent negative pressure thoracic drainage system adopts a modular and layered architecture, executed by the main control chip, and is used to realize the functions of negative pressure control, operation status management, low power consumption operation, and abnormal status monitoring of this invention. The software system includes the following functional modules, which can operate relatively independently, and also complete the overall system control through data interaction and status coordination.

[0017] 1. Hardware Abstraction and Driver Module The hardware abstraction and driver module is used to achieve unified management and access to underlying hardware resources, including but not limited to pressure sensor interfaces, I2C communication interfaces, analog-to-digital converters (ADCs), miniature negative pressure pump driver interfaces, button input interfaces, and indicator light and buzzer control interfaces.

[0018] The pressure sensor is connected to the main control chip via an I2C communication interface and reads digital pressure data according to a preset timing sequence.

[0019] The analog-to-digital converter (ADC) is used to acquire and convert analog data such as battery voltage and device current.

[0020] The miniature negative pressure pump drive interface is used to control the start-up, shutdown, and operating status of the negative pressure pump.

[0021] The key input interface samples and performs software debouncing on the key signals.

[0022] The indicator light and buzzer control interface is used to control the start and stop status of the indicator light and buzzer.

[0023] 2. Equipment self-test module After the device is powered on, the system first enters a self-test phase to confirm whether the device interface, device power detection, etc., are in normal condition. The self-test process includes, but is not limited to, the following tests.

[0024] The device interface status detection function checks whether the micro negative pressure pump drive interface is abnormal.

[0025] The device power detection uses the voltage value read through the ADC interface to determine whether the current power level meets the device's minimum startup requirements.

[0026] During the equipment self-test, if any critical test item fails, the system will use indicator lights and a buzzer to indicate the equipment malfunction and prevent the system from entering the equipment operation phase; if all test items are normal, the system will enter the equipment operation phase and begin scheduling various tasks.

[0027] 3 Equipment Operation Module Once the device enters the operating state, the main control chip performs multi-task parallel scheduling, including but not limited to executing the following four core tasks.

[0028] (1) Key scanning task It is responsible for responding to real-time user interaction via buttons by reading button levels (the hardware abstraction and driver module obtains the button state), performing gear switching (adjusting the target negative pressure gear of the device according to the button state), and displaying the negative pressure gear (showing the target negative pressure gear in real time via LED indicators for the user to confirm the current status). (2) Negative pressure control task The core component responsible for negative pressure regulation of the equipment system maintains the actual negative pressure within the target range. It acquires the current pressure through a pressure sensor (after the hardware abstraction and drive module acquires the original pressure value, it can filter out outliers), regulates the negative pressure using a negative pressure algorithm (comparing the actual negative pressure value with the target value, including but not limited to negative pressure regulation through PID control algorithms), and drives a miniature negative pressure pump (controlling the start, stop, or working intensity of the miniature negative pressure pump based on the calculation results of the negative pressure regulation algorithm) to quickly and stably maintain the system negative pressure within the target range.

[0029] (3) Power detection task This task is responsible for real-time monitoring of the device's power status, obtaining the battery voltage value through a digital-to-analog converter module, and displaying the converted power information through LED power indicator lights.

[0030] (4) Anomaly detection task This task is continuously executed during equipment operation to ensure system safety. It is triggered during both the equipment self-test and operation phases to monitor critical states. During operation, it can also detect negative pressure buildup. If, after the negative pressure control task is initiated, the actual negative pressure fails to reach or maintain the target value within a specified time, it is considered a negative pressure buildup failure.

[0031] When an abnormal condition is detected, the system will output abnormal information through indicator lights, buzzers, and other output devices. If necessary, the negative pressure pump can be stopped and the one-way valve can be opened to open the closed thoracic drainage mode to ensure the safety of system operation.

[0032] After the battery 171 is installed in the electronic negative pressure device, it will enter standby mode. The electronic negative pressure device can be operated or put into standby mode by pressing and holding the button 182 to trigger the touch switch 12. When the electronic negative pressure device is operated by pressing and holding the button 182, it will enter the quick wake-up mode. In this mode, it will not go into sleep mode for 30 seconds and will quickly build up negative pressure, while displaying the device's power and status. It will enter standby mode if it is not operated for a long time. When the electronic negative pressure device is running, the negative pressure level can be switched by briefly pressing the button 182 to trigger the touch switch 12; when the user switches the negative pressure level, the negative pressure level indicator light 13 will flash to indicate this. Furthermore, a buzzer 15 is installed on the control box, and the buzzer 15 is connected to the PCBA board 11 to alert the user of equipment malfunctions.

[0033] This invention also provides a low-power operating mode: the electronic negative pressure device with a low-power operating mode automatically wakes up every 30-60 seconds in standby mode. Each time it wakes up, it checks the battery level 171 and controls the pressure sensor 14 to test the negative pressure value of the negative pressure tube. If the difference between the actual negative pressure and the target negative pressure is greater than the threshold, it will enter a 1-30 second negative pressure compensation process. Negative pressure establishment failure during wake-up: if a single establishment failure occurs, the buzzer 15 will sound a short beep; if multiple establishment failures occur, a device abnormality prompt will be entered. In order to ensure low power consumption, the power indicator light will only be displayed during wake-up. The device can be woken up directly by pressing and holding the button.

[0034] Finally, it should be noted that if the device is not used for an extended period of time, the battery 171 can be removed to prevent the invention from operating automatically; and the battery 171 should be disposed of promptly after it is depleted to prevent battery contamination.

[0035] Furthermore, the closed thoracic drainage bottle 2 is a double-lumen drainage bottle, which has a drainage cavity 23 and a water seal cavity 24, and the drainage cavity 23 and the water seal cavity 24 are connected. The drainage cavity 23 is connected to the patient's chest cavity through the drainage end tube 21, and the water seal cavity 24 is connected to the electronic negative pressure device 1 through the negative pressure end tube 22.

[0036] Furthermore, the negative pressure pump 163 is a miniature negative pressure pump; the battery 171 is a miniature battery. Compared to digital drainage devices, the miniature design of the negative pressure pump 163 and battery 171 can significantly reduce the size of the control box, thereby miniaturizing the entire electronic negative pressure device 1. This invention features a simple structure, small size, high reliability, and low cost, which can increase patients' willingness to use it. While achieving miniaturization, portability, and multi-level adjustable negative pressure drainage in the electronic negative pressure device, it ensures that in the event of power outages or electronic system failures, the closed chest drainage bottle can automatically and seamlessly switch to a power-free closed chest drainage mode, thus combining the precision of electronic control with the safety redundancy of closed chest drainage.

[0037] In summary, such as Figure 5 The working principle of the present invention is as follows: ①Active negative pressure drainage mode (when using battery power): Press and hold button 182 to operate the electronic negative pressure device 1, then press button 182 briefly to set the target negative pressure value, such as... Figure 2 The five negative pressure indicator lights represent 6, 8, 10, 12, and 14 cmH2O, respectively. The PCBA board 11 uses a main control chip to control the pressure sensor 14 to read the actual pressure inside the closed thoracic drainage bottle 2, and drives the negative pressure pump 163 through a PID control algorithm. The negative pressure pump 163 extracts gas from the closed thoracic drainage bottle 2, establishing a stable negative pressure environment inside the entire bottle. This negative pressure acts on the patient's thoracic cavity through the drainage tube 21, promoting the drainage of gas and / or fluid. The extracted gas is discharged to the atmosphere via the one-way valve 165 and the negative pressure pump 163 (path: patient's thoracic cavity → drainage effusion chamber 23 → water seal chamber 24 → negative pressure tube 161 → one-way valve 165 → negative pressure pump 163 → atmosphere). In this mode, stable and adjustable active negative pressure drainage is achieved, meeting the needs of portability and precise treatment.

[0038] ② Closed chest drainage mode (when equipment power is depleted): The negative pressure pump 163 stops working, and the negative pressure in the closed chest drainage bottle 2 gradually disappears due to continuous drainage. When the patient exhales or coughs, positive pressure is formed in the chest cavity, and gas enters the closed chest drainage bottle 2 through the drainage end tube 23, causing the pressure inside the closed chest drainage bottle 2 to increase. Because the exhaust end of the negative pressure pump 163 is directly connected to the atmosphere when it stops, the gas in the closed chest drainage bottle 2 can flow in the direction of the negative pressure pump 163 through the one-way valve 165 and be discharged to the atmosphere (path: patient's chest cavity → drainage effusion cavity 23 → water seal cavity 24 → negative pressure tube 161 → one-way valve 165 → atmosphere). Furthermore, when the patient inhales, a negative pressure is created in the thoracic cavity, reducing the air pressure inside the closed thoracic drainage bottle 2. A one-way valve prevents atmospheric air from flowing back into the closed thoracic drainage bottle 2 through the negative pressure tube 161. Simultaneously, the water seal fluid in the water seal chamber 24 also prevents air backflow, creating a slight negative pressure inside the closed thoracic drainage bottle 2. Combined with gravity, this achieves negative pressure drainage of the thoracic cavity. This system achieves drainage and anti-backflow functions completely without the need for electricity, automatically and seamlessly transitioning to closed thoracic drainage mode, greatly improving the clinical safety of the equipment.

[0039] Although the present invention has been illustrated and described through specific embodiments and alternative methods, it should be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, it should be understood that the present invention is not limited in any sense except by the appended claims and their equivalents.

Claims

1. An intelligent chest cavity negative pressure drainage device, comprising an electronic negative pressure device (1) and a closed chest cavity drainage bottle (2); the closed chest cavity drainage bottle (2) is provided with a drainage end tube (21) and a negative pressure end tube (22); the drainage end tube (21) is used to connect to the patient's chest cavity; the electronic negative pressure device (1) is provided with a negative pressure component, and the negative pressure end tube (22) is connected to the electronic negative pressure device (1) through the negative pressure component; Its features are, The negative pressure component includes: Negative pressure pipe (161) serves as an air guide channel; The negative pressure connector (162) is connected at one end to the beginning of the negative pressure pipe (161), and at the other end it passes through the electronic negative pressure device (1) and connects to the negative pressure end pipe (22). A negative pressure pump (163) has one end connected as the intake end to the tail end of a negative pressure pipe (161), and the other end connected as the exhaust end to the atmosphere; and A one-way valve (165) is connected to the section of the negative pressure pipe (161) leading to the negative pressure pump (163); The electronic negative pressure device (1) achieves active negative pressure mode when powered. In this mode, the airflow in the closed thoracic drainage bottle (2) flows from the negative pressure tube (161) toward the negative pressure pump (163) and is discharged to the atmosphere, so that negative pressure is formed in the closed thoracic drainage bottle (2); When the electronic negative pressure device (1) runs out of power, it achieves closed chest drainage mode. In this mode, when the patient exhales or coughs, positive pressure is formed in the chest cavity; the airflow in the closed chest drainage bottle (2) flows from the negative pressure tube (161) to the negative pressure pump (163) and is discharged to the atmosphere; and when the patient inhales, negative pressure is formed in the chest cavity; the air pressure in the closed chest drainage bottle (2) is reduced, and the one-way valve prevents air in the atmosphere from flowing back into the closed chest drainage bottle (2) through the negative pressure tube (161), so that a slight negative pressure is formed in the closed chest drainage bottle (2); combined with the effect of gravity, negative pressure drainage of the chest cavity is achieved.

2. The intelligent thoracic negative pressure drainage device according to claim 1, characterized in that, The electronic negative pressure device (1) includes: The control box, as the main body of the device, is installed on the side of the closed thoracic drainage bottle (2), and the negative pressure component is located inside the control box; PCBA board (11) is integrated inside the control box; A tactile switch (12) is installed on the control box and connected to the PCBA board (11) for starting the negative pressure, switching the negative pressure level, or turning off the negative pressure. The negative pressure level indicator light (13) is installed on the control box and connected to the PCBA board (11) to display the negative pressure level; A pressure sensor (14) is installed on the control box and connected to the PCBA board (11) to monitor the air pressure inside the closed thoracic drainage bottle (2) in real time. A pressure sensing tube (164), located inside the control box, has one end for sensing the pressure of the negative pressure tube (161) and the other end connected to a pressure sensor (14); and The battery (171) is located inside the control box and is connected to the PCBA board (11).

3. The intelligent thoracic negative pressure drainage device according to claim 2, characterized in that: The control box is equipped with a power indicator (172) for displaying the power level of the battery (171), and the power indicator (172) is connected to the PCBA board (11).

4. The intelligent thoracic negative pressure drainage device according to claim 3, characterized in that: The electronic negative pressure device (1) also includes a protective cover (181), which is detachably connected to the control box; The protective cover (181) is provided with a button (182), which corresponds to the position of the tactile switch (12) of the control box; the protective cover (181) is also provided with an observation window, which includes a negative pressure window area (183) and a power window area (184). The negative pressure window area (183) corresponds to the negative pressure gear indicator light (13); The power window area (184) corresponds to the power indicator light (172).

5. The intelligent thoracic negative pressure drainage device according to claim 2, characterized in that: The control box is equipped with a buzzer (15), which is connected to the PCBA board (11) and is used to alert the user of equipment malfunctions.

6. The intelligent thoracic negative pressure drainage device according to claim 2, characterized in that: The closed thoracic drainage bottle (2) is a double-lumen drainage bottle. The double-lumen drainage bottle is provided with a drainage cavity (23) and a water seal cavity (24), and the drainage cavity (23) and the water seal cavity (24) are connected. The drainage cavity (23) is connected to the patient's chest cavity through the drainage end pipe (21), and the water seal cavity (24) is connected to the electronic negative pressure device (1) through the negative pressure end pipe (22).

7. The intelligent thoracic negative pressure drainage device according to claim 2, characterized in that: The control box is attached to the side of the closed thoracic drainage bottle (2) with adhesive backing.

8. The intelligent thoracic negative pressure drainage device according to claim 3, characterized in that: The negative pressure pump (163) is a miniature negative pressure pump; the battery (171) is a miniature battery.

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