A minimally invasive negative pressure wound therapy device
By designing the unblocking rod and fluid extraction mechanism of the minimally invasive negative pressure drainage device, the problem of drainage needle blockage was solved, enabling smooth extraction of accumulated fluid and preventing blockage, thus improving drainage efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PEKING UNIV THIRD HOSPITAL QINHUANGDAO HOSPITAL
- Filing Date
- 2025-03-25
- Publication Date
- 2026-07-07
AI Technical Summary
Existing negative pressure drainage devices are prone to blockage of the drainage needle due to blood clots and necrotic tissue when aspirating fluid, making it difficult to clear the blockage and thus making it difficult to extract the fluid.
Design a minimally invasive negative pressure drainage device, which includes a connecting tube, a clearing rod and a fluid extraction mechanism. The clearing rod is fixed by a fixing mechanism and can be moved into the drainage needle to clear the blockage when blocked. The fluid extraction mechanism generates negative pressure to extract the accumulated fluid.
It effectively clears blockages in the drainage needle, ensuring that accumulated fluid can be smoothly extracted, preventing blockages, and improving drainage efficiency.
Smart Images
Figure CN224462030U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of negative pressure drainage device technology, and in particular to a minimally invasive negative pressure drainage device. Background Technology
[0002] Negative pressure drainage devices generate a negative pressure environment through a negative pressure source, causing the fluid at the drainage site to flow under negative pressure and thus drawing out the fluid. During plastic surgery, some parts of the body may accumulate fluid, which is then drained using a negative pressure drainage device. However, because the fluid usually contains blood clots, necrotic tissue, and scabs, these substances can cause blockages in the drainage needle during drainage, making it difficult to clear the blockage and thus hindering the drainage of the fluid. Utility Model Content
[0003] The purpose of this invention is to solve the shortcomings of existing technologies, such as the inability to clear blockages in the drainage needle during extraction, making it difficult to extract the accumulated fluid. Therefore, a minimally invasive negative pressure drainage device is proposed.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] Design a minimally invasive negative pressure drainage device, including a connecting cylinder, a connecting shell fixedly connected to the connecting cylinder, the connecting shell communicating with the connecting cylinder, a drainage needle tube connected to the lower end of the connecting shell, a drainage rod penetrating the upper end of the connecting shell, a sealing ring abutting the drainage rod, the sealing ring being fixedly connected to the connecting shell, the drainage rod being fixed by a fixing mechanism, and a fluid aspiration mechanism provided in the connecting cylinder.
[0006] Preferably, the liquid extraction mechanism includes a piston that abuts against the inner wall of the connecting cylinder, and a movable part is fixedly connected to the piston.
[0007] Preferably, the fixing mechanism includes a movable ring, which is sleeved on the connecting cylinder. A fixing frame is fixedly connected to the movable ring, and a bolt is threaded through the fixing frame. A fixing block is fixedly connected to the bolt.
[0008] Preferably, the connecting cylinder is made of a transparent material.
[0009] Preferably, a limiting part is fixedly connected to the connecting cylinder, and the limiting part limits the movement of the moving ring.
[0010] Preferably, a connecting frame is fixedly connected to the connecting cylinder, a stop bar is provided through the connecting frame, a disc is fixedly connected to the stop bar, and a spring is fixedly connected between the disc and the connecting frame.
[0011] Preferably, the fixing block is made of rubber material.
[0012] The present invention proposes a minimally invasive negative pressure drainage device, which has the following advantages: when the drainage needle tube is blocked, the unblocking rod is moved and enters the drainage needle tube. The movement of the unblocking rod plays a role in unblocking the blockage and preventing the accumulation of fluid from being drained. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a minimally invasive negative pressure drainage device proposed in this utility model;
[0014] Figure 2 This is a three-dimensional view of a minimally invasive negative pressure drainage device proposed in this utility model;
[0015] Figure 3 This is a three-dimensional cross-sectional view of a minimally invasive negative pressure drainage device proposed in this utility model;
[0016] Figure 4 This utility model proposes a minimally invasive negative pressure drainage device. Figure 2 Enlarged view of section A;
[0017] Figure 5 This utility model proposes a minimally invasive negative pressure drainage device. Figure 3 Enlarged view of section B.
[0018] In the diagram: 1. Connecting cylinder; 2. Moving part; 3. Drainage needle tube; 4. Connecting shell; 5. Unblocking rod; 6. Sealing ring; 7. Limiting part; 8. Moving ring; 9. Connecting frame; 10. Stop bar; 11. Spring; 12. Disc; 13. Piston; 14. Fixing frame; 15. Bolt; 16. Fixing block. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0020] Example 1: Refer to Figure 1-4 A minimally invasive negative pressure drainage device includes a connecting cylinder 1, which is made of transparent material to allow observation of the amount of fluid extracted. The connecting cylinder 1 is provided with scale lines. A connecting shell 4 is fixedly connected to the connecting cylinder 1 and is in communication with the connecting cylinder 1. A drainage needle tube 3 is connected to the lower end of the connecting shell 4. A clearing rod 5 is provided through the upper end of the connecting shell 4 and is located directly above the drainage needle tube 3. A sealing ring 6 is abutted on the clearing rod 5, which plays a sealing role to prevent air leakage.
[0021] The sealing ring 6 is fixedly connected to the connecting shell 4, and the unblocking rod 5 is fixed by the fixing mechanism. The connecting cylinder 1 is equipped with a liquid extraction mechanism. When the drainage needle tube 3 is blocked, the unblocking rod 5 is moved and enters the drainage needle tube 3. The movement of the unblocking rod 5 plays a role in unblocking and preventing the blockage from proceeding, so that the accumulated liquid can be extracted and drained.
[0022] The liquid extraction mechanism includes a piston 13, which abuts against the inner wall of the connecting cylinder 1. A movable part 2 is fixedly connected to the piston 13. By pulling the movable part 2, the piston 13 is moved, creating a negative pressure environment to extract the accumulated liquid.
[0023] Example 2: Refer to Figure 1-5 As another preferred embodiment of this utility model, based on embodiment 1, the fixing mechanism includes a movable ring 8, which is sleeved on the connecting cylinder 1. A fixing frame 14 is fixedly connected to the movable ring 8, and a bolt 15 is threaded through the fixing frame 14. A fixing block 16 is fixedly connected to the bolt 15. The fixing block 16 is made of rubber material. By tightening the bolt 15, the fixing block 16 is pressed against the connecting cylinder 1 to fix the movable ring 8, thereby fixing the unblocking rod 5 and preventing the unblocking rod 5 from entering the drainage needle tube 3 and affecting the drainage process during use.
[0024] When the drainage needle tube 3 becomes blocked, the fixing of the moving ring 8 is released by rotating the bolt 15, which drives the fixing frame 14 to move back and forth. The fixing frame 14 drives the moving ring 8 to move, and the unblocking rod 5 enters the drainage needle tube 3. The movement of the unblocking rod 5 plays a role in unblocking. Then, the moving part 2 is pulled to drive the piston 13 to move, creating a negative pressure environment to draw out the accumulated liquid and drain it into the connecting cylinder 1.
[0025] Example 3: Reference Figure 1-3 As another preferred embodiment of this utility model, based on embodiment 2, a limiting part 7 is fixedly connected to the connecting cylinder 1. The limiting part 7 limits the moving ring 8, preventing the unblocking rod 5 from falling off the sealing ring 6.
[0026] Example 4: During liquid drainage, the piston 13 may easily detach from the connecting cylinder 1, causing liquid to flow out. (Refer to...) Figure 1-5 In another preferred embodiment of this utility model, based on embodiment 3, a connecting frame 9 is fixedly connected to the connecting cylinder 1, a stop bar 10 is provided through the connecting frame 9, a disc 12 is fixedly connected to the stop bar 10, and a spring 11 is fixedly connected between the disc 12 and the connecting frame 9. The stop bar 10 serves as a limiting and blocking function to prevent the piston 13 from disengaging from the connecting cylinder 1. At the same time, when it is necessary to clean the inside of the connecting cylinder 1, the disc 12 is pulled to release the stop bar 10 from limiting the piston 13, so that the piston 13 can be removed and the inside of the connecting cylinder 1 can be cleaned.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A minimally invasive negative pressure drainage device, comprising a connecting tube (1), characterized in that, A connecting shell (4) is fixedly connected to the connecting cylinder (1). The connecting shell (4) is connected to the connecting cylinder (1). A drainage needle (3) is connected to the lower end of the connecting shell (4). A draining rod (5) is provided through the upper end of the connecting shell (4). A sealing ring (6) is abutted on the draining rod (5). The sealing ring (6) is fixedly connected to the connecting shell (4). The draining rod (5) is fixed by a fixing mechanism. The connecting cylinder (1) is provided with a liquid extraction mechanism.
2. The minimally invasive negative pressure drainage device according to claim 1, characterized in that, The liquid extraction mechanism includes a piston (13), which abuts against the inner wall of the connecting cylinder (1), and a movable part (2) is fixedly connected to the piston (13).
3. The minimally invasive negative pressure drainage device according to claim 1, characterized in that, The fixing mechanism includes a movable ring (8), which is sleeved on the connecting cylinder (1). A fixing frame (14) is fixedly connected to the movable ring (8), and a bolt (15) is threaded through the fixing frame (14). A fixing block (16) is fixedly connected to the bolt (15).
4. The minimally invasive negative pressure drainage device according to claim 3, characterized in that, The connecting cylinder (1) is made of transparent material.
5. A minimally invasive negative pressure drainage device according to claim 4, characterized in that, A limiting part (7) is fixedly connected to the connecting cylinder (1), and the limiting part (7) limits the movement ring (8).
6. The minimally invasive negative pressure drainage device according to claim 1, characterized in that, A connecting frame (9) is fixedly connected to the connecting cylinder (1), a stop bar (10) is provided through the connecting frame (9), a disc (12) is fixedly connected to the stop bar (10), and a spring (11) is fixedly connected between the disc (12) and the connecting frame (9).
7. A minimally invasive negative pressure drainage device according to claim 3, characterized in that, The fixing block (16) is made of rubber material.