Portable negative pressure drainage device
By designing a portable negative pressure drainage device, which combines a collection bottle, a piston plate, and a tension spring, the problems of large size and high cost of existing devices are solved, achieving convenient operation and efficient drainage, and is suitable for short-term treatment of outpatients.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOURTH MILITARY MEDICAL UNIVERSITY
- Filing Date
- 2024-09-03
- Publication Date
- 2026-04-21
AI Technical Summary
Existing negative pressure suction devices are bulky, expensive, and inconvenient to carry, making it difficult to meet the needs of outpatients for convenient use.
A portable negative pressure drainage device was designed, including a collection bottle, a piston plate, a tension spring, and a strap. It achieves convenient negative pressure suction through push rod operation, and improves comfort and aesthetics through transparent materials and curved concave surfaces. Combined with a detachable sealing component and a rotatably connected drainage tube, it ensures airtightness and drainage of multiple wounds.
It achieves convenient operation, comfortable portability, and efficient negative pressure drainage, making it suitable for short-term treatment of outpatients and improving the aesthetics and user experience of the device.
Smart Images
Figure CN224141266U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical auxiliary equipment technology, specifically relating to a portable negative pressure drainage device. Background Technology
[0002] Negative pressure wound therapy (NPWT) is a method for treating superficial wounds and for deep drainage. It can effectively remove secretions from cavities or wounds, accelerating wound healing. Currently, most negative pressure suction devices for wounds are equipped in inpatient wards, mainly for postoperative treatment of hospitalized patients. They have disadvantages such as large device size, high cost, and inconvenience in carrying, and are not suitable for short-term negative pressure drainage after outpatient surgeries such as plastic surgery or dermatological surgery.
[0003] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Utility Model Content
[0004] The purpose of this invention is to provide a portable negative pressure drainage device that is easier to operate and allows patients to use it independently at home.
[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:
[0006] A portable negative pressure drainage device includes a collection bottle and a drainage tube. The collection bottle contains a piston plate, and the top of the piston plate has a push rod that passes through the top of the collection bottle. The collection bottle also contains multiple first tension springs, one end of which is fixedly connected to the inner top wall of the collection bottle, and the other end is fixedly connected to the top of the piston plate. Straps are provided on both outer side walls of the collection bottle. A drain pipe is located at the bottom of the collection bottle, and a detachable sealing assembly is provided at the drain pipe. The collection bottle is made of transparent material.
[0007] Furthermore, the collection bottle is also equipped with multiple guide posts; the piston plate has guide holes that slide and seal with the guide posts; the first tension spring is sleeved on the guide posts. The cooperation between the guide posts and the guide holes allows the piston plate to maintain balance when sliding up and down.
[0008] Furthermore, the piston plate has an insertion hole at its top for inserting the push rod; a placement block for placing the push rod is formed on the outer wall of the collection bottle, and the placement block has a placement hole. By inserting the push rod into the piston plate, after the piston plate is pushed to the bottom of the collection bottle, the push rod can be disassembled and inserted into the placement hole. This prevents the push rod from continuously extending upwards when the piston plate resets, thus improving the overall aesthetics of the device.
[0009] Furthermore, the back of the collection bottle has a concave arc. During use, the collection bottle needs to be strapped to the patient's body; the concave arc allows for a better fit, increasing comfort.
[0010] Furthermore, the drainage tube is rotatably connected to the collection bottle; a connecting nozzle is formed at the bottom of the collection bottle, and two inlet channels are formed at the top of the connecting nozzle; one end of the drainage tube is formed with a connector rotatably connected to the connecting nozzle, the connector including a plug that inserts into the inside of the connecting nozzle and a connecting cap that connects to the outside of the connecting nozzle, the plug having two outlet channels communicating with the inlet channels; a sealing ring is formed on the inner wall of the connecting cap, and a sealing groove that mates with the sealing ring is formed on the outer wall of the connecting nozzle. Rotating the drainage tube to the collection bottle, when the piston plate is pushed downwards, rotates the drainage tube, causing the two outlet channels to be misaligned with the inlet channels, thus preventing waste liquid or air from being pushed back to the wound along the drainage tube.
[0011] Furthermore, the sealing assembly includes a rubber stopper and a sealing cap, the sealing cap being threadedly connected to the drain pipe; an installation step is formed on the inner wall of the drain pipe; the inner diameter of the installation step gradually decreases from top to bottom; multiple sliding rods are formed on the rubber stopper, a limiting block is formed at the top of the sliding rods; a sliding cavity for the limiting block to slide and a sliding hole for the sliding rods to slide are formed within the installation step; a second tension spring is sleeved on the sliding rod, one end of the second tension spring being fixedly connected to the bottom of the limiting block, and the other end being fixedly connected to the inner lower wall of the sliding cavity; the top of the rubber stopper is pointed; a plug is also formed on the inner bottom of the sealing cap, which abuts against the bottom of the rubber stopper. The rubber stopper and sealing cap enhance the airtightness of the drain pipe.
[0012] With the above structure, the portable negative pressure drainage device of this utility model, compared with the prior art, by setting a piston plate and a first tension spring inside the collection bottle, when in use, the piston plate is pushed to the inner bottom of the collection bottle by the push rod to expel the air below the piston plate. Then the drain pipe is closed, and the drainage pipe is connected to the collection bottle. At this time, the piston plate can be slowly pulled back under the action of the first tension spring to draw the exudate from the wound into the collection bottle. The overall operation is very convenient. In addition, a strap is set on the collection bottle to make it easy to fix the collection bottle to the patient's body and make it easy for the patient to carry. Attached Figure Description
[0013] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a structural schematic diagram of the present invention from another angle;
[0016] Figure 3 for Figure 1 A cross-sectional schematic diagram;
[0017] Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;
[0018] Figure 5 for Figure 3 A magnified schematic diagram of the local structure at point B;
[0019] Figure 6 This is a schematic diagram of the piston plate in this utility model;
[0020] Figure 7 This is a schematic diagram of the drainage tube in this utility model;
[0021] Figure 8 This is a schematic diagram of the structure of the rubber stopper in this utility model.
[0022] The symbols of the main components are explained as follows: 1. Collection bottle, 11. Piston plate, 111. Guide hole, 112. Insertion hole, 12. Push rod, 13. First tension spring, 14. Strap, 15. Drain pipe, 151. Mounting step, 1511. Sliding cavity, 1512. Guide post, 16. Placement block, 17. Prevention hole, 171. Arc concave surface, 18. Connecting nozzle, 19. Inlet channel, 191. Drain pipe, 2. Connector, 211. Insertion connector, 211. Outlet channel, 2111. Connecting cover, 212. Sealing ring, 2121. Sealing assembly, 3. Rubber stopper, 31. Sliding rod, 311. Limiting block, 3111. Sealing cover, 32. Plug, 321. Second tension spring, 33. Detailed Implementation
[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.
[0024] like Figures 1 to 8As shown, this utility model relates to a portable negative pressure drainage device, including a collection bottle 1 and a drainage tube 2. A piston plate 11 is provided inside the collection bottle 1, and a push rod 12 passing through the top of the piston plate 11 is provided at the top of the collection bottle 1. Multiple first tension springs 13 are also provided inside the collection bottle 1, one end of which is fixedly connected to the inner top wall of the collection bottle 1, and the other end is fixedly connected to the top of the piston plate 11. Straps 14 are provided on both outer side walls of the collection bottle 1; specifically, the straps 14 can be elastic bands. In use, the collection bottle 1 can be strapped to a point close to the patient's wound. The collection bottle 1 has a drain pipe 15 at its bottom, with a detachable sealing assembly 3 at the drain pipe 15. In use, the piston plate 11 is pushed into the bottom of the collection bottle 1 using the push rod 12, causing the first tension spring 13 to extend. Under the action of the first tension spring 13, the piston plate 11 is pulled back, creating a negative pressure state in the space below the piston plate 11. This allows for the suction of exudate from the wound. The collection bottle 1 is made of transparent material, allowing for easy observation of the position of the piston plate 11 inside, thus determining whether a negative pressure effect still exists within the collection bottle 1. In this embodiment, the collection bottle 1 also has multiple guide posts 16; the piston plate 11 has guide holes 111 that slide and seal with the guide posts 16; the first tension spring 13 is sleeved on the guide posts 16. The cooperation between the guide posts 16 and the guide holes 111 allows the piston plate 11 to maintain balance during its up-and-down sliding motion.
[0025] Preferably, the piston plate 11 has an insertion hole 112 at its top for inserting into the push rod 12; a placement block 17 for placing the push rod 12 is formed on the outer wall of the collection bottle 1, and a placement hole is formed on the placement block 17. The push rod 12 is inserted into the piston plate 11. After the piston plate 11 is pushed to the bottom of the collection bottle 1, the push rod 12 can be disassembled and inserted into the placement hole. This prevents the push rod 12 from continuously extending upward when the piston plate 11 is reset, and increases the overall aesthetics of the device.
[0026] Preferably, the back of the collection bottle 1 has an arc-shaped concave surface 18. During use, the collection bottle 1 needs to be strapped to the patient's body. The arc-shaped concave surface 18 allows the collection bottle 1 to better conform to the body, increasing comfort. Additionally, a sponge pad can be attached to the arc-shaped concave surface 18 to further enhance comfort.
[0027] Preferably, the drainage tube 2 is rotatably connected to the collection bottle 1; a connecting nozzle 19 is formed at the bottom of the collection bottle 1, and two inlet channels 191 are formed at the top of the connecting nozzle 19; the bottoms of the two inlet channels 191 are connected and communicate with the connecting nozzle 19; one end of the drainage tube 2 is formed with a connector 21 rotatably connected to the connecting nozzle 19; the connector 21 includes a plug 211 that is inserted into the inside of the connecting nozzle 19 and a connecting cap 212 that is connected to the outside of the connecting nozzle 19; the plug 21 has a... There are two outlet channels 2111 connected to the inlet channel 191, and the bottom ends of both outlet channels 2111 are connected to the drainage tube 2. The plug and the inner top of the connecting nozzle 19 are in abutting contact, so that the outlet channel 2111 and the inlet channel 191 can be directly connected. A sealing ring 2121 is formed on the inner wall of the connecting cover 212, and a sealing groove that cooperates with the sealing ring 2121 is formed on the outer wall of the connecting nozzle 19. The sealing ring 2121 can increase the airtightness of the connector 21. The drainage tube 2 is rotatably connected to the collection bottle 1. When the piston plate 11 is pushed down, the drainage tube 2 is rotated, so that the two outlet channels 2111 and the inlet channel 191 are misaligned. This can prevent waste liquid or air from being pushed back to the wound along the drainage tube 2. Specifically, an arrow can be set on the outer wall of the connecting cover 212 and an indicator point can be set on the connecting nozzle 19. By observing the arrow and the indicator point, it can be determined whether the inlet channel 191 and the outlet channel 2111 are aligned and connected. In addition, some patients may have multiple wounds. Multiple branch tubes can be installed at the end of the drainage tube 2, with each branch tube placed at a wound site. In this way, multiple wound sites can be drained simultaneously using a single negative pressure drainage device.
[0028] Preferably, the sealing assembly 3 includes a rubber stopper 31 and a sealing cap 32, the sealing cap 32 being threadedly connected to the drain pipe 15; the inner wall of the drain pipe 15 has an installation step 151; the inner diameter of the installation step 151 gradually decreases from top to bottom, making drainage smoother; multiple sliding rods 311 are formed on the rubber stopper 31, a limiting block 3111 is formed at the top of the sliding rods 311, and a sliding cavity 1511 for the limiting block 3111 to slide is formed in the installation step 151. A sliding hole 1512 is provided for the sliding rod 311 to slide. A second tension spring 33 is fitted on the sliding rod 311. One end of the second tension spring 33 is fixedly connected to the bottom of the limiting block 3111, and the other end is fixedly connected to the inner wall of the sliding cavity 1511. The top of the rubber plug 31 is pointed. A plug 321 is formed on the inner bottom of the sealing cap 32, which abuts against the bottom of the rubber plug 31. The plug 321 can squeeze the rubber plug 31 towards the mounting step 151. The rubber plug 31 and the sealing cap 32 can enhance the airtightness of the drain pipe 15. When drainage is required, the sealing cap 32 is unscrewed. Under the rebound action of the second tension spring 33, the rubber plug 31 is separated from the mounting step 151, and the liquid can be drained.
[0029] The method of using this utility model is as follows: First, tie the collection bottle 1 to the patient's body with the strap 14, as close as possible to the wound. After connecting the drainage tube 2 to the patient's wound, rotate the connector 21 to misalign the inlet channel 191 and the outlet channel 2111. Then, unscrew the sealing cap 32 to open the drain pipe 15. Next, use the push rod 12 to push the piston plate 11 downwards so that the piston plate 11 is at the bottom of the collection bottle 1. Then, tighten the sealing cap 32 to close the drain pipe 15. Then, rotate the connector 21 to connect the inlet channel 191 and the outlet channel 2111. At this time, the collection bottle 1 can generate negative pressure under the pull of the first tension spring 13 to draw out the exudate from the wound. When it is necessary to drain the exudate, open the sealing cap 32 and misalign the inlet channel 191 and the outlet channel 2111, and then push the piston plate 11 downwards.
[0030] The above provides a detailed description of a portable negative pressure drainage device provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A portable negative pressure wound drainage device comprising a liquid collection bottle (1) and a drainage tube (2), characterized in that: The collection bottle (1) is provided with a piston plate (11), and the top of the piston plate (11) is provided with a push rod (12) that passes through the top of the collection bottle (1); the collection bottle (1) is also provided with multiple first tension springs (13), one end of the first tension spring (13) is fixedly connected to the inner top wall of the collection bottle (1), and the other end is fixedly connected to the top of the piston plate (11); the two outer side walls of the collection bottle (1) are provided with straps (14); the bottom of the collection bottle (1) is provided with a drain pipe (15), and the drain pipe (15) is provided with a detachable sealing component (3); the collection bottle (1) is made of transparent material. The sealing assembly (3) includes a rubber plug (31) and a sealing cap (32), the sealing cap (32) being threadedly connected to the drain pipe (15); the inner wall of the drain pipe (15) has an installation step (151); the inner diameter of the installation step (151) gradually decreases from top to bottom, and multiple sliding rods (311) are formed on the rubber plug (31), with a limiting block (3111) formed at the top of the sliding rod (311), and a sliding space for the limiting block (3111) to slide is formed inside the installation step (151). The slide cavity (1511) and the slide hole (1512) for sliding the slide rod (311) are provided with a second tension spring (33), one end of the second tension spring (33) is fixedly connected to the bottom of the limiting block (3111), and the other end is fixedly connected to the inner wall of the slide cavity (1511); the top of the rubber plug (31) is pointed; a plug (321) is also formed on the inner bottom of the sealing cover (32) to abut against the bottom of the rubber plug (31). The drainage tube (2) is rotatably connected to the collection bottle (1); a connecting nozzle (19) is formed at the bottom of the collection bottle (1), and two inlet channels (191) are formed at the top of the connecting nozzle (19); a connector (21) is formed at one end of the drainage tube (2) and is rotatably connected to the connecting nozzle (19); the connector (21) includes a plug (211) that is inserted into the inside of the connecting nozzle (19) and a connecting cap (212) that is connected to the outside of the connecting nozzle (19); two outlet channels (2111) that communicate with the inlet channels (191) are formed inside the plug (211); a sealing ring (2121) is formed on the inner wall of the connecting cap (212), and a sealing groove that cooperates with the sealing ring (2121) is formed on the outer wall of the connecting nozzle (19).
2. The portable negative pressure wound therapy device of claim 1, wherein: The collection bottle (1) is also provided with multiple guide posts (16); the piston plate (11) has a guide hole (111) that slides and seals with the guide post (16); the first tension spring (13) is sleeved on the guide post (16).
3. The portable negative pressure wound therapy device of claim 2, wherein: The piston plate (11) has an insertion hole (112) at the top for insertion into the push rod (12); a placement block (17) for placing the push rod (12) is formed on the outer side wall of the liquid collection bottle (1), and a placement hole (171) is formed on the placement block (17).
4. The portable negative pressure wound therapy device of claim 3, wherein: The back of the liquid collecting bottle (1) has an arc-shaped concave surface (18).