Adjustable negative pressure thoracic closed drainage device

Abstract

The application discloses a thoracic cavity closed drainage device with adjustable negative pressure and particularly relates to the technical field of medical instruments, and comprises a drainage mechanism and a strap mechanism. The drainage mechanism comprises a liquid collecting unit for collecting thoracic cavity drainage liquid, a water seal unit for forming a liquid seal, and a negative pressure generating unit for generating negative pressure, and further comprises a base box. The thoracic cavity closed drainage device with adjustable negative pressure can realize real-time monitoring of pressure changes in the negative pressure pipeline by cooperating with a pressure sensor and a controller through the independent negative pressure generating unit, and can automatically adjust the rotating speed of the air pump according to a target value set by a user, so as to realize accurate and stable control of the negative pressure. Compared with the traditional mode of relying on an external negative pressure source and rough adjustment, the precision and response speed of negative pressure adjustment are improved, the thoracic cavity can be adapted to physiological state changes such as breathing and coughing of a patient, pressure fluctuations are prevented from being too large to cause damage to the thoracic cavity, and the safety of drainage and the treatment effect are enhanced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustable negative pressure closed thoracic drainage device. Background Technology

[0002] Closed thoracic drainage is one of the most widely used basic techniques in thoracic surgery, primarily used to treat pneumothorax, hemothorax, empyema, and to drain oozing and effusion after various thoracic surgeries. Its core purpose is to effectively remove gas and fluid from the pleural cavity, promote lung re-expansion, restore negative pressure in the pleural cavity, and prevent intrapleural infection. However, existing techniques have the following limitations: However, traditional three-bottle closed thoracic drainage devices still have significant limitations in practical applications. Their main drawback is that achieving negative pressure drainage requires continuous suction from an external central negative pressure system or a wall-mounted negative pressure suction device. This connection method confines the patient to the bedside, severely restricting early postoperative ambulation, hindering lung function training and prevention of deep vein thrombosis in the lower extremities, thus affecting the implementation of the enhanced recovery after surgery (ERAS) concept. Furthermore, the negative pressure adjustment method of traditional devices is rather crude, typically setting a fixed negative pressure value by changing the insertion depth of the ventilation tube within the regulating bottle. Once set, it is difficult to adjust in real-time and precisely according to changes in intrathoracic pressure during coughing and breathing, or air leakage. Although some devices have ventilation holes in the regulating chamber and are adjusted in conjunction with a negative pressure generator, their operation is complex and their precision needs improvement. Summary of the Invention

[0003] The main objective of this invention is to provide an adjustable negative pressure closed chest drainage device, which can effectively solve the problems of traditional closed chest drainage devices that rely on an external central negative pressure source, causing patients to be confined to the bed and unable to move freely, as well as the crude negative pressure adjustment method, difficulty in real-time and precise control according to the patient's respiratory status, and complex operation with low precision.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An adjustable negative pressure closed thoracic drainage device includes a drainage mechanism and a strap mechanism. The drainage mechanism includes a collection unit for collecting thoracic drainage fluid, a water seal unit for forming a liquid seal, and a negative pressure generating unit for generating negative pressure. It also includes a base box. The collection unit and the water seal unit are detachably installed on the top of the base box, and the negative pressure generating unit is disposed above the base box.

[0005] The carrying strap mechanism is connected to the base box and is used to carry the drainage mechanism.

[0006] Preferably, the drainage mechanism further includes a control unit disposed on the top of the base box, the negative pressure generating unit is mounted on the top of the control unit, and the control unit includes a controller, as well as a display module, an adjustment input module and an alarm module electrically connected to the controller respectively.

[0007] Preferably, the negative pressure generating unit is a miniature diaphragm air pump, and the water seal unit includes a water seal bottle and a second sealing threaded cap. The second sealing threaded cap is threaded onto the top of the water seal bottle, and the top of the second sealing threaded cap is fixedly connected to an air inlet pipe and a negative pressure outlet pipe that extend into the inner cavity of the water seal bottle.

[0008] Preferably, the liquid collection unit includes a liquid collection bottle and a sealing threaded cap. The sealing threaded cap is threadedly installed on the top of the liquid collection bottle. The top of the sealing threaded cap is fixedly connected to an inlet pipe and an outlet pipe that penetrate into the inner cavity of the liquid collection bottle. The outer walls of both the liquid collection bottle and the water seal bottle are coated with graduation lines.

[0009] Preferably, a connecting air pipe is connected between the top of the air outlet pipe and the top of the air inlet long pipe, a liquid collection pipe is connected to the top of the liquid inlet pipe, a negative pressure pipe is connected to the top of the negative pressure air outlet pipe, the negative pressure pipe is connected to the air inlet end of the micro diaphragm air pump, and a pressure sensor is installed inside the negative pressure pipe, the pressure sensor being electrically connected to the controller.

[0010] Preferably, a one-way valve is fixedly installed in the inner cavity of the air inlet tube, sterile liquid is pre-filled in the water seal bottle, and the lower end of the air inlet tube is submerged below the surface of the sterile liquid.

[0011] Preferably, the top of the base box is provided with two bottle mounting mechanisms, which are used to detachably mount the liquid collection bottle and the water seal bottle, respectively.

[0012] Preferably, the bottle mounting mechanism includes a base plate rotatably mounted on the top of the base box, the top of the base plate having a threaded mounting hole, the inner ring of the threaded mounting hole having a threaded disc, and the threaded discs of the two bottle mounting mechanisms being respectively fixedly mounted on the bottom of the liquid collection bottle and the water seal bottle.

[0013] Preferably, the inner cavity of the base box is provided with a power module, and the outer wall of the power module is provided with a charging port that extends through to the outer wall of the base box. The power module is electrically connected to the control unit and the negative pressure generating unit respectively.

[0014] Preferably, the shoulder strap mechanism includes two lifting straps fixedly installed at the bottom of the base box, a connecting strap fixedly connected between the tops of the two lifting straps, two hooks rotatably installed on the top of the connecting strap, a torsion spring baffle is provided at the opening of each hook, a hanging ring is sleeved on the inner side of each hook, and a shoulder strap is connected to the outer wall of the two hanging rings.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides an adjustable negative pressure closed thoracic drainage device. By setting an independent negative pressure generating unit, which works in conjunction with a pressure sensor and controller, it can monitor the pressure changes in the negative pressure pipeline in real time and automatically adjust the air pump speed according to the target value set by the user, so as to achieve precise and stable control of negative pressure. Compared with the traditional method that relies on an external negative pressure source and has a coarse adjustment, it improves the accuracy and response speed of negative pressure adjustment, can adapt to changes in the patient's physiological state such as breathing and coughing, avoids excessive pressure fluctuations that may cause damage to the thoracic cavity, and enhances the safety of drainage and treatment effect.

[0016] 2. This invention provides an adjustable negative pressure closed thoracic drainage device. A carrying strap mechanism is integrated at the bottom of the base box, including a lifting strap, connecting strap, hook, and detachable shoulder strap. Patients can choose between hanging or shoulder carrying depending on their activity level, making the drainage device portable. This allows patients to get out of bed early after surgery, promoting lung function recovery and preventing deep vein thrombosis in the lower extremities, aligning with the concept of rapid recovery after surgery. Furthermore, the combination of the shoulder strap and hook is simple, reliable, and easy to disassemble, meeting both bedridden use needs and easy portability, thus improving patient comfort and compliance.

[0017] 3. This invention provides an adjustable negative pressure closed thoracic drainage device. By setting up a detachable collection unit and a water seal unit, and adopting an installation structure that uses a threaded disc and a base plate, the bottle replacement operation is simple and quick, without the need to disassemble the whole machine or use tools. Medical staff can complete the replacement of the collection bottle or the inspection and renewal of the liquid in the water seal bottle in a short time, reducing operation interruption time and reducing the risk of infection. At the same time, the control unit integrates display, adjustment and alarm modules, providing real-time feedback on the drainage status, and timely warning of abnormal situations, which facilitates clinical management and improves work efficiency and patient safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drainage mechanism of the present invention; Figure 3 This is a schematic diagram of the liquid collection unit and water seal unit of the present invention; Figure 4 This is a schematic diagram of the control unit structure of the present invention; Figure 5 This is a schematic diagram of the bottle mounting mechanism of the present invention; Figure 6 This is a schematic diagram of the shoulder strap mechanism of the present invention.

[0019] In the diagram: 1. Drainage mechanism; 11. Base box; 111. Bottle mounting mechanism; 1111. Base plate; 1112. Threaded mounting hole; 1113. Threaded disc; 112. Power module; 113. Charging port; 12. Liquid collection unit; 121. Liquid collection bottle; 1211. Scale line; 122. Sealing threaded cap one; 123. Liquid inlet pipe; 1231. Liquid collection pipe; 124. Gas outlet pipe; 1241. Connecting gas pipe; 13. Water seal unit; 131. Water seal bottle ; 132. Sealing threaded cap II; 133. Inlet long pipe; 1331. One-way valve; 134. Negative pressure outlet pipe; 1341. Negative pressure pipe; 1342. Pressure sensor; 14. Control unit; 141. Controller; 142. Display module; 143. Adjustment input module; 144. Alarm module; 15. Negative pressure generating unit; 2. Shoulder strap mechanism; 21. Lifting strap; 22. Connecting strap; 23. Hook; 24. Torsion spring baffle; 25. Shoulder strap; 26. Hanging ring. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 6 As shown, an adjustable negative pressure closed thoracic drainage device includes a drainage mechanism 1 and a carrying strap mechanism 2. The carrying strap mechanism 2 is connected to the base box 11 of the drainage mechanism 1 and is used to carry the entire drainage mechanism 1 for the convenience of patients when getting out of bed after surgery.

[0022] like Figure 1 and Figure 2 As shown, the drainage mechanism 1 includes a base box 11, a liquid collection unit 12, a water seal unit 13, a control unit 14, and a negative pressure generating unit 15. The liquid collection unit 12 and the water seal unit 13 are detachably installed on the top of the base box 11. The negative pressure generating unit 15 is located on the top of the control unit 14, and the control unit 14 is installed on the top of the base box 11. The liquid collection unit 12 is used to collect and contain pleural drainage fluid. The water seal unit 13 is used to form a liquid seal to prevent gas backflow. The negative pressure generating unit 15 is a miniature diaphragm air pump used to generate negative pressure.

[0023] like Figure 3As shown, the liquid collection unit 12 includes a liquid collection bottle 121 and a first sealing threaded cap 122. The first sealing threaded cap 122 is threaded onto the top of the liquid collection bottle 121. The top of the first sealing threaded cap 122 is fixedly connected to an inlet pipe 123 and an outlet pipe 124 that penetrate into the inner cavity of the liquid collection bottle 121. The water seal unit 13 includes a water seal bottle 131 and a second sealing threaded cap 132. The second sealing threaded cap 132 is threaded onto the top of the water seal bottle 131. The top of the second sealing threaded cap 132 is fixedly connected to an inlet long pipe 133 that penetrates into the inner cavity of the water seal bottle 131 and a negative pressure outlet pipe 134. The outer walls of both the liquid collection bottle 121 and the water seal bottle 131 are coated with scale lines 1211 for easy observation of liquid volume.

[0024] Furthermore, before using this device, medical staff should first check whether all connecting pipes are unobstructed, whether the sealing cap is tightened, and whether the sterile liquid in the water seal bottle 131 has reached the specified scale line. After starting the device, the required negative pressure value is set by adjusting the input module 143. The controller 141 will automatically control the operation of the negative pressure generating unit 15. The pressure sensor 1342 will provide real-time feedback of the pressure value to the display module 142 for monitoring by medical staff. When the liquid level in the collection bottle 121 is close to overflow or the pressure is abnormal, the alarm module 144 will issue an audible and visual warning to remind the staff to handle the situation promptly.

[0025] like Figure 3 and Figure 4 As shown, a connecting air pipe 1241 is connected between the top of the air outlet pipe 124 and the top of the air inlet long pipe 133, thereby realizing gas communication between the collection bottle 121 and the water seal bottle 131. The top of the liquid inlet pipe 123 is connected to the liquid collection pipe 1231, which is used to guide pleural effusion into the inner cavity of the collection bottle 121. The top of the negative pressure air outlet pipe 134 is connected to the negative pressure pipe 1341, which is connected to the air inlet of the micro diaphragm air pump. A pressure sensor 1342 is installed inside the negative pressure pipe 1341, which is electrically connected to the controller 141 in the control unit 14 for real-time monitoring of the pressure in the pipeline.

[0026] like Figure 4 As shown, the control unit 14 includes a controller 141, and a display module 142, an adjustment input module 143, and an alarm module 144, which are electrically connected to the controller 141. The adjustment input module 143 is used to receive the target negative pressure value set by the user. The controller 141 generates a control command based on the difference between the real-time pressure value detected by the pressure sensor 1342 and the target negative pressure value to adjust the rotation speed of the negative pressure generating unit 15, so that the pressure in the negative pressure tube 1341 approaches and is maintained at the target negative pressure value. The alarm module 144 is used to issue an audible and visual alarm signal when the pressure exceeds a preset safety threshold.

[0027] like Figure 3As shown, a one-way valve 1331 is fixedly installed in the inner cavity of the air inlet tube 133 to prevent gas or liquid from flowing back from the water seal bottle 131 to the collection bottle 121. The water seal bottle 131 is pre-filled with sterile liquid, and the lower end of the air inlet tube 133 is immersed below the surface of the sterile liquid to form a liquid seal structure.

[0028] like Figure 2 and Figure 5 As shown, the top of the base box 11 is provided with two bottle mounting mechanisms 111, which are used to detachably mount the liquid collection bottle 121 and the water seal bottle 131, respectively. The bottle mounting mechanism 111 includes a base plate 1111 rotatably mounted on the top of the base box 11. The top of the base plate 1111 is provided with a threaded mounting hole 1112. A threaded disc 1113 is threaded on the inner ring of the threaded mounting hole 1112. The threaded discs 1113 of the two bottle mounting mechanisms 111 are fixedly mounted on the bottom of the liquid collection bottle 121 and the water seal bottle 131, respectively. During operation, one hand holds the liquid collection bottle 121 or the water seal bottle 131, and the other hand rotates the base plate 1111 to achieve quick disassembly or installation of the bottle.

[0029] Furthermore, when replacing the collection bottle 121, the clamp on the collection tube 1231 should be closed first to prevent gas from entering the pleural cavity. Then, rotate the base plate 1111 to remove the collection bottle 121 and the threaded plate 1113 together. After replacing with a new sterile collection bottle, tighten and reinstall it. The sterile liquid in the water seal bottle 131 should be checked regularly. If it is found to be turbid or reduced, it should be replaced in time.

[0030] like Figure 2 As shown, a power module 112 is provided inside the base box 11, and a charging port 113 is provided on the outer wall of the power module 112, which extends through to the outer wall of the base box 11. The power module 112 is a rechargeable battery used to power the control unit 14 and the negative pressure generating unit 15.

[0031] like Figure 6 As shown, the carrying strap mechanism 2 includes two lifting straps 21 fixedly installed at the bottom of the base box 11. A connecting strap 22 is fixedly connected between the tops of the two lifting straps 21. Two hooks 23 are rotatably installed on the top of the connecting strap 22. A torsion spring baffle 24 is provided at the opening of each hook 23. A hanging ring 26 is sleeved on the inner side of each hook 23. Shoulder straps 25 are connected to the outer walls of the two hanging rings 26. The hanging rings 26 can squeeze the torsion spring baffle 24 to engage with the inner side of the hooks 23 to complete the assembly. When the patient is in bed, the shoulder straps 25 and hanging rings 26 can be removed and suspended on both sides of the bed by the hooks 23. When getting out of bed, the patient can carry the entire drainage mechanism 1 by carrying the shoulder straps 25 on one shoulder.

[0032] Furthermore, patients can choose between suspension or shoulder carrying methods according to their own situation. The length of the shoulder strap 25 can be adjusted according to the patient's body shape to ensure that the device is stable and comfortable, facilitating early ambulation after surgery and promoting recovery.

[0033] The working principle of this adjustable negative pressure closed thoracic drainage device will be explained in detail below.

[0034] like Figure 1-6 As shown, during use, the effusion tube 1231 is connected to the patient's chest cavity, and the effusion enters the collection bottle 121. Gas enters the water-seal bottle 131 through the exhaust tube 124 and the connecting tube 1241. The lower end of the long air inlet tube 133 is immersed in the sterile liquid to form a liquid seal. The one-way valve 1331 inside prevents backflow. The negative pressure generating unit 15 is activated, and air is drawn from the water-seal bottle 131 through the negative pressure tube 1341, causing the system to generate negative pressure. The pressure sensor 1342 detects the pressure in the negative pressure tube 1341 in real time and sends the signal to the controller 141. Medical staff can then... The input module 143 sets the target negative pressure value. The controller 141 automatically adjusts the air pump speed according to the difference between the real-time pressure and the target value to make the negative pressure accurately and stably stay at the set value. When the pressure exceeds the safety threshold, the controller 141 activates the alarm module 144 to issue an audible and visual alarm. When the collection bottle 121 is full, the rotatable base plate 1111 can be used to remove the bottle for cleaning or replacement. When the patient gets out of bed, the device is carried by the carrying strap mechanism 2 composed of the shoulder strap 25 and the hook 23. When the patient is in bed, the shoulder strap 25 can be removed and the device can be hung on both sides of the bed by the hook 23.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable negative pressure closed thoracic drainage device, characterized in that: The device includes a drainage mechanism (1) and a strap mechanism (2). The drainage mechanism (1) includes a collection unit (12) for collecting pleural drainage fluid, a water seal unit (13) for forming a liquid seal, and a negative pressure generating unit (15) for generating negative pressure. It also includes a base box (11). The collection unit (12) and the water seal unit (13) are detachably installed on the top of the base box (11), and the negative pressure generating unit (15) is located above the base box (11). The carrying strap mechanism (2) is connected to the base box (11) and is used to carry the drainage mechanism (1).

2. The adjustable negative pressure closed thoracic drainage device according to claim 1, characterized in that: The drainage mechanism (1) also includes a control unit (14) disposed on the top of the base box (11), and the negative pressure generating unit (15) is installed on the top of the control unit (14). The control unit (14) includes a controller (141), and a display module (142), an adjustment input module (143) and an alarm module (144) respectively electrically connected to the controller (141).

3. The adjustable negative pressure closed thoracic drainage device according to claim 2, characterized in that: The negative pressure generating unit (15) is a miniature diaphragm air pump. The water seal unit (13) includes a water seal bottle (131) and a second sealing threaded cap (132). The second sealing threaded cap (132) is threadedly installed on the top of the water seal bottle (131). The top of the second sealing threaded cap (132) is fixedly connected to an air inlet pipe (133) that extends into the inner cavity of the water seal bottle (131) and a negative pressure outlet pipe (134).

4. The adjustable negative pressure closed thoracic drainage device according to claim 3, characterized in that: The liquid collection unit (12) includes a liquid collection bottle (121) and a sealing threaded cap (122). The sealing threaded cap (122) is threaded onto the top of the liquid collection bottle (121). The top of the sealing threaded cap (122) is fixedly connected to an inlet pipe (123) and an outlet pipe (124) that penetrate into the inner cavity of the liquid collection bottle (121). The outer walls of the liquid collection bottle (121) and the water seal bottle (131) are coated with scale lines (1211).

5. The adjustable negative pressure closed thoracic drainage device according to claim 4, characterized in that: A connecting pipe (1241) is connected between the top of the air outlet pipe (124) and the top of the air inlet pipe (133). A liquid collection pipe (1231) is connected to the top of the liquid inlet pipe (123). A negative pressure pipe (1341) is connected to the top of the negative pressure air outlet pipe (134). The negative pressure pipe (1341) is connected to the air inlet of the micro diaphragm air pump. A pressure sensor (1342) is installed inside the negative pressure pipe (1341). The pressure sensor (1342) is electrically connected to the controller (141).

6. The adjustable negative pressure closed thoracic drainage device according to claim 5, characterized in that: A one-way valve (1331) is fixedly installed in the inner cavity of the air inlet tube (133), and sterile liquid is pre-filled in the water seal bottle (131). The lower end of the air inlet tube (133) is submerged below the surface of the sterile liquid.

7. The adjustable negative pressure closed thoracic drainage device according to claim 4, characterized in that: The base box (11) has two bottle mounting mechanisms (111) on its top. The two bottle mounting mechanisms (111) are used to detachably mount the liquid collection bottle (121) and the water seal bottle (131).

8. The adjustable negative pressure closed thoracic drainage device according to claim 7, characterized in that: The bottle mounting mechanism (111) includes a base plate (1111) rotatably mounted on the top of the base box (11). The top of the base plate (1111) is provided with a threaded mounting hole (1112). A threaded disc (1113) is threaded on the inner ring of the threaded mounting hole (1112). The threaded discs (1113) of the two bottle mounting mechanisms (111) are respectively fixedly mounted on the bottom of the liquid collection bottle (121) and the water seal bottle (131).

9. The adjustable negative pressure closed thoracic drainage device according to claim 2, characterized in that: The base box (11) is provided with a power module (112) in its inner cavity. The outer wall of the power module (112) is provided with a charging port (113) that extends through to the outer wall of the base box (11). The power module (112) is electrically connected to the control unit (14) and the negative pressure generating unit (15).

10. The adjustable negative pressure closed thoracic drainage device according to claim 1, characterized in that: The shoulder strap mechanism (2) includes two lifting straps (21) fixedly installed at the bottom of the base box (11). A connecting strap (22) is fixedly connected between the tops of the two lifting straps (21). Two hooks (23) are rotatably installed on the top of the connecting strap (22). A torsion spring baffle (24) is provided at the opening of each hook (23). A hanging ring (26) is sleeved on the inner side of each hook (23). A shoulder strap (25) is connected to the outer wall of the two hanging rings (26).

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