Auricle reconstruction negative pressure drainage device

Abstract

The invention discloses a negative pressure drainage device for auricle reconstruction. The negative pressure drainage device comprises a fixing part, a negative pressure device, a regulation and control assembly and a drainage tube, the fixing piece is detachably connected with the negative pressure device and is used for fixing the negative pressure device in the drainage area; the negative pressure device is used for generating drainage negative pressure and maintaining drainage pressure and comprises a syringe, one end of the syringe is connected with the regulation and control assembly, a push rod is inserted into the other end of the syringe, and the drainage negative pressure can be generated after the push rod slides in the syringe; and a pressure stabilizing ring is arranged on the push rod. The whole structure is small, can be pasted behind the ear through the fixing paste, is convenient to carry and does not affect the action of a patient; the fixing paste fixes the syringe through the silica gel buckle, so that the syringe is convenient to disassemble and fix, the replacement is convenient, the operation is simple, and the labor intensity of medical staff is reduced; a pressure stabilizing ring is matched with a pressure regulating hole to regulate the pressure, so that the operation is simple; and different drainage pressures can be generated by utilizing different pressure adjusting holes, so that the use flexibility is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a negative pressure drainage device for auricle reconstruction. Background Art

[0002] Congenital microtia is one of the most common congenital malformations, and patients require total ear reconstruction to "regain an ear." After auricular reconstruction surgery, blood and tissue fluid may seep out of the surgical wound, accumulating between the flap and cartilage, forming a dead space and affecting the proper adhesion of the flap to the cartilage. To ensure the effectiveness of the surgery, the leaked blood and tissue fluid are aspirated when necessary to ensure proper adhesion of the flap to the cartilage and avoid the formation of a dead space.

[0003] The traditional negative pressure drainage devices currently used in total ear reconstruction surgery have the following problems: 1. Existing drainage devices are large in size, expensive to use, and only serve to drain effusion, with a single function; 2. The amount of fluid discharged after auricular reconstruction surgery is small, and the existing drainage device is large and difficult to fix. It not only affects the patient's movement, but also makes it difficult to observe the amount of fluid discharged and judge the recovery status; 3. After auricle reconstruction surgery, as the wound continues to heal, the drainage pressure also needs to be adjusted. The pressure adjustment structure of the existing negative pressure drainage device is complex and inconvenient to operate. 4. The diameter of the existing drainage tube is too large, which is not suitable for the wound surface of ear surgery. The hard material is easy to compress the reconstructed ear cartilage scaffold. The uneven distribution of drainage holes can also cause local fluid accumulation. 5. To improve the drainage effect, the existing drainage device increases the number of drainage tubes, which will increase the number of surgical incisions and affect the blood circulation of the flap. In addition, multiple tubes in parallel are prone to entanglement and blockage.

[0004] Therefore, we need to design a negative pressure drainage device for auricle reconstruction to solve these problems. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a negative pressure drainage device for auricle reconstruction.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A negative pressure drainage device for auricle reconstruction surgery, comprising a fixing piece, a negative pressure device, a regulating component and a drainage tube; The fixing member is detachably connected to the negative pressure device and is used to fix the negative pressure device in the drainage area; The negative pressure device is used to generate drainage negative pressure and maintain drainage pressure. The negative pressure device includes a syringe, one end of which is connected to the regulating component, and the other end of which is inserted with a push rod. When the push rod in the syringe moves away from the regulating component, drainage negative pressure is generated in the syringe between the push rod and the regulating component. The push rod is provided with a pressure regulating hole and a pressure stabilizing ring, and the pressure stabilizing ring is provided with a limiting column, which matches the pressure regulating hole. When the limiting column on the pressure stabilizing ring is inserted into the pressure regulating hole, the pressure stabilizing ring will no longer slide along the push rod, and when the pressure stabilizing ring is in contact with the injection cylinder, the push rod will no longer approach the regulating assembly; The regulating assembly includes a check valve and a three-way valve, wherein the check valve is used to prevent the liquid in the syringe from flowing back, and the three-way valve is used to switch the connection state of the drainage tube; One end of the drainage tube is connected to the regulating component, and the other end is buried in the drainage area.

[0007] Preferably, a plurality of pressure regulating holes are provided on the push rod, and the plurality of pressure regulating holes are arranged one by one along the moving direction of the push rod. The pressure stabilizing ring is sleeved on the outside of the push rod, and a fixing frame is fixed inside the pressure stabilizing ring. A limiting column is provided on the fixing frame, and the limiting column matches the pressure regulating hole.

[0008] If a multi-level pressure regulating hole setting method is adopted, the limit column can be inserted into the pressure regulating holes in different positions, and the position of the push rod can be accurately controlled, thereby adjusting the negative pressure to meet the pressure requirements of different patients or different drainage stages; the locking structure of the limit column and the pressure regulating hole can prevent the push rod from sliding, ensuring the stability of the negative pressure value and the controllability of the device.

[0009] Preferably, the check valve comprises a check valve body, a limit frame and a ring plate; The limiting frame and the ring plate are fixedly arranged in the check valve body, and the check valve body close to the limiting frame is connected to the connecting pipe on the injection cylinder; A sealing block and a spring are provided between the ring plate and the limiting frame; One end of the spring is connected to the limiting frame, and the other end is connected to the sealing block; When the spring is in a balanced state, the sealing block is in contact with the ring plate.

[0010] The spring-driven sealing block structure achieves a one-way seal, automatically utilizing fluid pressure to achieve unidirectional flow. When negative pressure builds up within the syringe barrel, the inflowing liquid pushes the sealing block away from the ring plate, allowing liquid to flow in through the gap between the sealing block and the ring plate. In the event of backflow, the spring pushes the sealing block against the ring plate, blocking backflow. This design is simple and responsive, achieving backflow prevention without the need for additional power, offering high reliability and low maintenance, while effectively ensuring the unidirectional nature of the drainage path.

[0011] Preferably, the drainage tube includes a suction tube, a flushing tube and a connector; The pipette is located in the flushing tube and is fixedly connected to the flushing tube through the connector. The length of the pipette is not less than that of the flushing tube. A plurality of drainage holes are provided on the pipette outside the free end of the flushing tube.

[0012] With this setting, the dual functions of "drainage + flushing" are integrated by coaxially nesting the suction tube and the flushing tube, without the need for additional pipelines, simplifying the operation process; the longer suction tube can ensure that it penetrates into the core part of the drainage area, improving drainage efficiency; the drainage holes are spirally arranged on the outside of the flushing tube to improve the drainage effect.

[0013] Preferably, the three-way valve comprises a three-way valve body, a valve core, a flushing joint and an adjusting knob; The valve core is sealingly rotatably mounted in the three-way valve body. A flushing channel and a drainage channel are provided through the valve core. Sealing rings are provided on the valve core on both sides of the flushing channel and the drainage channel. The flushing joint and the regulating knob are both located on the outer wall of the three-way valve body. The regulating knob is rotatably arranged on the outer wall of the three-way valve body and is fixedly connected to the valve core; the flushing connector is fixed on the outer wall of the three-way valve body. When the valve core is rotated, the syringe barrel will be connected to the liquid suction tube, or the flushing connector will be connected to the flushing tube.

[0014] This setting allows the independent flushing channel and drainage channel on the valve core to be isolated by the sealing ring, which can prevent contamination caused by mixing of the two; the design of the linkage between the adjustment knob and the valve core makes the operation intuitive and convenient. Medical staff can quickly switch functional modes by rotating the knob, such as from drainage mode to flushing mode, reducing the frequency of pipeline replacement; the integrated valve core has a compact structure and occupies little space, making it suitable for integration into miniaturized drainage devices, thereby improving the flexibility of clinical use.

[0015] Preferably, an anti-slip block is fixedly provided on the free end of the limiting column, and the anti-slip block is made of silicone.

[0016] With this arrangement, the silicone material has the characteristics of good elasticity and wear resistance, and the anti-fall-off block can prevent the limit column from accidentally falling out of the pressure regulating hole, ensuring that the push rod position is reliably locked.

[0017] Preferably, a piston is fixedly provided at the end of the push rod located in the syringe, and the piston is slidably sealed with the syringe.

[0018] With this arrangement, the sliding sealing structure between the piston and the syringe barrel can minimize negative pressure leakage, ensuring that the negative pressure generated when the push rod slides is effectively transmitted to the drainage area; the tight fit of the piston can also prevent liquid from seeping into the gap between the push rod and the syringe barrel, preventing contamination of the internal structure, while improving the smoothness of the push rod movement, allowing medical staff to more accurately control the size of the negative pressure during operation.

[0019] Preferably, the fixing member includes a fixing patch, the fixing patch is provided with a buckle, the buckle is C-shaped and made of silicone, and the inner diameter of the buckle is the same as the outer diameter of the injection barrel.

[0020] With this setting, the fixing patch is made of breathable and highly elastic material, which not only achieves breathability and perspiration, but also prevents it from falling off due to loose adhesion. It can stably adhere to the skin or dressing surface and provide basic fixing force; the C-shaped silicone buckle has elastic deformation ability and can tightly clamp the syringe. At the same time, the soft properties of silicone avoid hard extrusion damage to the surface of the syringe; the combined design of the buckle and the fixing patch realizes the "adhesion + clamp" dual fixation, which can not only adapt to body surface parts with different curvatures, but also prevent the lateral displacement of the syringe, thereby improving the overall fixation reliability and patient comfort; at the same time, it also avoids the process of tearing off the tape when replacing the syringe when fixing with tape, preventing the waste of tape caused by repeated sticking and tearing, and the problem of the scale on the syringe being easily blurred and falling off, avoiding the inability to observe the flow rate of the drainage liquid.

[0021] Preferably, the diameter of the drainage tube is 2mm-3mm, a plurality of the drainage holes are arranged on the flushing tube along a spiral line, and the spacing between adjacent drainage holes in the same spiral direction is 2mm-3mm.

[0022] With this setting, the use of a 2mm-3mm thin diameter drainage tube can reduce the size of the puncture wound, lowering the risk of patient trauma and infection, and is especially suitable for drainage of superficial or sensitive areas; the spirally arranged drainage holes can improve the drainage effect, forming a 360° drainage area with no dead angles, avoiding the occurrence of local fluid accumulation due to uneven distribution of drainage holes, and can effectively remove blood clots, tissue fragments and other blockages around the drainage tube to maintain smooth drainage.

[0023] The advantages and positive effects of the present invention are: The overall structure of the present invention is small, and it can be attached to the back of the ear through a fixing patch, which is easy to carry and will not affect the patient's movement; the fixing patch fixes the syringe barrel through a silicone clip, which is convenient for disassembly and fixation of the syringe, and is easy to replace and simple to operate, reducing the labor intensity of medical staff; the regulated pressure is adjusted by the pressure stabilizing ring in conjunction with the pressure regulating hole, which is simple to operate; different drainage pressures can be generated by using different pressure regulating holes, which improves the flexibility of use. The drainage tube is buried between the skin and the cartilage, and the continuous negative pressure effect not only realizes the drainage of the accumulated fluid, but also makes the skin close to the cartilage under the negative pressure, and the shaping effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the use state of the present invention; Figure 2 This is a schematic diagram of the state when negative pressure is not established in the syringe of the present invention; Figure 3 2 is a schematic diagram of a state in which negative pressure is established in the syringe of the present invention; Figure 4 It is a schematic cross-sectional view of the internal structure of the present invention; Figure 5 It is a schematic diagram of the structure of the voltage stabilizing ring of the present invention; Figure 6 is a schematic cross-sectional view of the drainage tube of the present invention; Figure 7 This is a schematic diagram of the state when the limiting column of the present invention is not inserted into the pressure regulating hole; Figure 8 This is a schematic diagram of the state where the limit column of the present invention is inserted into the pressure regulating hole Figure 9 This is a schematic diagram of the position structure of the drainage channel and the flushing channel of the present invention Figure 10 yes Figure 4 A magnified view of the structure in Figure 2.

[0026] The following are the descriptions of the reference numerals: 1. Fixing part; 11. Fixing sticker; 12. Buckle; 2. Negative pressure device; 21. Syringe; 22. Push rod; 23. Piston; 24. Pressure regulating hole; 25. Pressure stabilizing ring; 26. Limiting column; 27. Connecting pipe; 28. Fixing bracket; 29. Anti-slip block; 3. Control assembly; 31. Check valve body; 32. Sealing block; 33. Limiting bracket; 34. Spring; 35. Three-way valve body; 36. Flushing connector; 37. Adjusting knob; 38. Sealing ring; 39. Valve core; 40. Flushing channel; 41. Drainage channel; 42. Ring plate; 5. Drainage tube; 51. Flushing tube; 52. Suction tube; 53. Drainage hole; 54. Connector. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] The present invention will be further described below with reference to the accompanying drawings: Example: Figures 1-10 As shown, a negative pressure drainage device for auricle reconstruction surgery includes a fixing member 1, a negative pressure device 2, a regulating component 3 and a drainage tube 5; The fixing part 1 is detachably connected to the negative pressure device 2 and is used to fix the negative pressure device 2 in the drainage area; the presence of the fixing part 1 provides stable support for the entire drainage system, and its detachable design with the negative pressure device 2 enables the negative pressure device 2 to be flexibly installed and disassembled in different drainage scenarios, facilitating the adjustment of the fixation and position of the negative pressure device 2, and providing basic conditions for subsequent negative pressure drainage.

[0030] refer to Figure 1 、 Figure 2 and Figure 3 To explain, the negative pressure device 2 is used to generate drainage negative pressure and maintain drainage pressure. The negative pressure device 2 includes a syringe 21, one end of the syringe 21 is connected to the regulating component 3, and the other end is inserted with a push rod 22. When the push rod 22 slides in the syringe 21, drainage negative pressure will be generated; a pressure stabilizing ring 25 and a limiting column 26 are provided on the push rod 22. The pressure stabilizing ring 25 is sleeved on the push rod 22 and can slide along the longitudinal direction of the push rod 22, and a number of pressure regulating holes 24 are opened on the push rod 22 along the longitudinal direction. After rotating the pressure stabilizing ring 25, the limiting column 26 will be inserted into the pressure regulating hole 24, which can prevent the push rod 22 from moving back, and will maintain the drainage pressure in the syringe 21; the negative pressure device 2 serves as the core power source of the system. The push rod 22 slides in the syringe 21 to form a volume change to generate negative pressure, and the cooperation of the pressure stabilizing ring 25 and the push rod 22 can dynamically adjust and stably maintain the generated negative pressure. The syringe 21 is connected to the regulating component 3, and transmits the generated negative pressure to the regulating component 3, which then acts on the drainage tube 5 to achieve the drainage function.

[0031] refer to Figure 4 and Figure 10 For explanation, the regulating component 3 includes a check valve and a three-way valve. The check valve is used to prevent the liquid in the syringe 21 from flowing back, and the three-way valve is used to switch the connection state of the drainage tube 5. The regulating component 3 plays the role of a "transfer station" and a "control valve". The check valve ensures that the negative pressure generated by the negative pressure device 2 can act on the drainage tube 5 in a unidirectional manner to prevent the liquid from flowing back and contaminating the negative pressure device 2. The three-way valve realizes the connection between the syringe 21 and the drainage tube 5 for drainage, or the connection between the flushing connector 36 and the drainage tube 5 for flushing by rotating the valve core 39, so that the drainage system can perform different functions as needed. It should be noted that the flushing connector 36 needs to be covered with a sterilization cap when not in use to prevent debris from falling into it and causing contamination.

[0032] One end of the drainage tube 5 is connected to the regulating component 3, and the other end is buried in the drainage area; the negative pressure drainage device of the present invention is used for drainage after auricle reconstruction surgery, so the drainage area includes the auricle and its vicinity. The drainage tube 5 is a component that directly contacts the drainage area. After the negative pressure device 2 generates negative pressure and the regulating component 3 controls the connection state, the liquid in the drainage area is transferred to the negative pressure device 2 through negative pressure suction to complete the drainage process.

[0033] like Figure 3 As shown, a plurality of pressure regulating holes 24 are provided on the push rod 22. The plurality of pressure regulating holes 24 are arranged one by one along the moving direction of the push rod 22. The pressure stabilizing ring 25 is sleeved on the outside of the push rod 22. Figure 5 As shown, a fixing bracket 28 is fixedly disposed within the pressure-stabilizing ring 25, and a limiting post 26 is disposed on the fixing bracket 28. The limiting post 26 matches the pressure-regulating hole 24. The cooperation between the pressure-regulating hole 24 and the limiting post 26 enables medical personnel to precisely control the position of the push rod 22 by selecting the pressure-regulating hole 24 at different positions, thereby adjusting the negative pressure generated by the negative pressure device 2. The pressure-stabilizing ring 25, through the cooperation between the fixing bracket 28 and the limiting post 26 and the pressure-regulating hole 24, fixes the position of the push rod 22, ensuring stable negative pressure.

[0034] The check valve includes a check valve body 31, in which a limit frame 33 and a ring plate 42 are fixedly arranged. A sealing block 32 and a spring 34 are arranged between the ring plate 42 and the limit frame 33. One end of the spring 34 is connected to the limit frame 33, and the other end is connected to the sealing block 32. The sealing block 32 fits well with the ring plate 42, and the check valve body 31 close to the side of the limit frame 33 is connected to the connecting pipe 27 on the injection cylinder 21; when the negative pressure device 2 generates negative pressure, the accumulated liquid in the drainage area will push the sealing block 32 to leave the ring plate 42, and the liquid can flow to the negative pressure device 2 through the gap between the sealing block 32 and the ring plate 42 through the check valve; when the accumulated liquid flows back, the spring 34 will push the sealing block 32 to press the ring plate 42 to prevent the liquid from flowing back.

[0035] Specifically, the three-way valve includes a three-way valve body 35, a valve core 39 is rotatably provided in the three-way valve body 35, a flushing flow channel 40 and a drainage flow channel 41 are provided on the valve core 39, and a sealing ring 38 is sleeved on the valve core 39 between the flushing flow channel 40 and the drainage flow channel 41, and an adjusting knob 37 and a flushing joint 36 are provided on the three-way valve body 35. The adjusting knob 37 is fixedly connected to the valve core 39. When the valve core 39 is rotated, the syringe 21 will be connected to the pipette 52, or the flushing joint 36 will be connected to the flushing joint 36. The washing tube 51 is connected; the medical staff rotates the adjustment knob 37 to drive the valve core 39 to rotate. When drainage is needed, the syringe barrel 21, the drainage channel 41 and the pipette 52 are connected, and the negative pressure generated by the negative pressure device 2 acts on the pipette 52 for drainage; when flushing is needed, the valve core 39 is rotated to connect the flushing connector 36, the flushing channel 40 and the flushing tube 51 to flush the auricle. The sealing ring 38 ensures that there will be no liquid leakage and cross-flow between different channels to avoid contamination.

[0036] like Figure 6 and Figure 2As shown, the drainage tube 5 includes a suction tube 52 and a flushing tube 51. The suction tube 52 is located inside the flushing tube 51 and is fixedly connected to the flushing tube 51 through a connector. The length of the suction tube 52 is not less than the length of the flushing tube 51, and a plurality of drainage holes 53 are provided on the suction tube 52 located outside the flushing tube 51. The nested design of the suction tube 52 and the flushing tube 51 realizes both drainage and flushing functions on one drainage tube 5, reducing puncture wounds and reducing the risk of patient trauma and infection. The suction tube 52 is long and can penetrate deep into the drainage area, sucking liquid through the drainage holes 53, and completing drainage with the cooperation of the negative pressure device 2 and the control component 3. When the three-way valve is switched to the flushing state, the flushing tube 51 can deliver flushing liquid through the flushing channel 40 to flush the drainage area to prevent infection.

[0037] The free end of the limiting column 26 is fixed with an anti-slip block 29, which is made of silicone. The anti-slip block 29 can prevent the limiting column 26 from accidentally falling out of the pressure regulating hole 24, ensuring that the push rod 22 works stably in the set position, ensuring that the negative pressure generated by the negative pressure device 2 meets the set requirements, and avoiding the negative pressure instability caused by the limiting column 26 falling out of the pressure regulating hole 24, affecting the drainage effect.

[0038] refer to Figure 4 For explanation, a piston 23 is fixedly provided at the end of the push rod 22 located in the syringe 21, and the piston 23 and the syringe 21 are slidingly sealed; the sliding sealing design of the piston 23 and the syringe 21 ensures that the negative pressure generated when the push rod 22 slides in the syringe 21 will not leak, so that the negative pressure can be effectively transmitted to the regulating component 3 and the drainage tube 5, thereby improving the working efficiency and drainage effect of the negative pressure device 2.

[0039] Specifically, the fixing member 1 includes a fixing patch 11, on which a buckle 12 is provided. The buckle 12 is C-shaped and made of silicone. The inner diameter of the buckle 12 is the same as the outer diameter of the syringe 21. The fixing patch 11 provides basic adhesive fixing force to fix the device near the drainage area, and the C-shaped silicone buckle 12 tightly clamps the syringe 21 through elastic deformation. The double fixing method ensures that the negative pressure device 2 will not be displaced during the drainage process, ensuring the stability of the entire drainage system. At the same time, it also avoids the process of tearing off the tape when replacing the syringe when fixing with tape, prevents the waste of tape caused by repeated sticking and tearing, and prevents the problem of the scale on the syringe being blurred and falling off, avoiding the inability to observe the flow rate of the drainage liquid.

[0040] The diameter of the drainage tube 5 is 2mm-3mm, and a plurality of drainage holes 53 are arranged along a spiral line on the flushing tube 51, and the spacing between adjacent drainage holes 53 in the same spiral direction is 2mm-3mm; the thinner diameter of the drainage tube 5 can reduce damage to the tissue in the drainage area, and the drainage holes 53 arranged in a spiral line and with reasonable spacing can enable the drainage tube 5 to evenly absorb the liquid in the drainage area under the action of negative pressure, avoiding insufficient or excessive local drainage, and also preventing the drainage holes 53 in the same direction from being blocked by blood clots or other substances, thereby ensuring a smooth drainage process.

[0041] The working process of this embodiment is as follows: when in use, the ends of the suction tube 52 and the irrigation tube 51 provided with the drainage hole 53 at one end are buried in the auricle after the auricle reconstruction surgery is completed, and then the adhesive tape on the fixing patch 11 is torn off and the fixing patch 11 is pasted behind the ear. Then, the adjusting knob 37 is first turned to disconnect the drainage channel and the irrigation channel from the drainage tube 5. Then, the push rod 22 is pulled according to the pressure required for drainage. The push rod 22 will drive the piston 23 in the syringe 21 to move, so that negative pressure is generated in the syringe 21. Then, the pressure stabilizing ring 25 is moved to the corresponding pressure regulating hole 24, and then the pressure stabilizing ring 25 is rotated to make the limit on the fixing frame 28 The column 26 is inserted into the corresponding pressure regulating hole 24, and then the push rod 22 is released. Under the action of the negative pressure of the syringe 21, the push rod 22 will slide into the syringe 21 until it slides to the pressure stabilizing ring 25 and stops after contacting the syringe 21. At this time, a stable negative pressure environment is established in the syringe 21. Then the medical staff clamps the syringe 21 onto the buckle 12, and finally turns the adjusting knob 37 to make the drainage channel 41 connect the syringe 21 and the pipette 52. At this time, the negative pressure of the syringe 21 will suck the accumulated fluid in the drainage area into the syringe 21 through the pipette 52, and the check valve body 31 inside the syringe 21 prevents the liquid entering the syringe 21 from flowing back to prevent infection.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure drainage device for auricle reconstruction, characterized by: It comprises a fixing member (1), a negative pressure device (2), a regulating component (3) and a drainage tube (5); The fixing member (1) is detachably connected to the negative pressure device (2) and is used to fix the negative pressure device (2) in the drainage area; The negative pressure device (2) is used to generate drainage negative pressure and maintain drainage pressure. The negative pressure device (2) comprises a syringe (21). One end of the syringe (21) is connected to the regulating component (3), and the other end is provided with a push rod (22). When the push rod (22) in the syringe (21) moves away from the regulating component (3), drainage negative pressure is generated in the syringe (21) between the push rod (22) and the regulating component (3). The push rod (22) is provided with a pressure regulating hole (24) and a pressure stabilizing ring (25), and the pressure stabilizing ring (25) is provided with a limiting column (26), and the limiting column (26) matches the pressure regulating hole (24). When the limiting column (26) on the pressure stabilizing ring (25) is inserted into the pressure regulating hole (24), the pressure stabilizing ring (25) will no longer slide along the push rod (22), and when the pressure stabilizing ring (25) is fitted with the injection cylinder (21), the push rod (22) will no longer approach the regulating assembly (3); The regulating assembly (3) includes a check valve and a three-way valve, wherein the check valve is used to prevent the liquid in the injection barrel (21) from flowing back, and the three-way valve is used to switch the connection state of the drainage tube (5); One end of the drainage tube (5) is connected to the regulating component (3), and the other end is buried in the drainage area.

2. The negative pressure drainage device for auricle reconstruction according to claim 1, characterized in that: The push rod (22) is provided with a plurality of pressure regulating holes (24), which are arranged one by one along the moving direction of the push rod (22). The pressure stabilizing ring (25) is sleeved on the outside of the push rod (22), a fixing frame (28) is fixedly arranged in the pressure stabilizing ring (25), and the limiting column (26) is fixedly arranged on the fixing frame (28).

3. The negative pressure drainage device for auricle reconstruction according to claim 1, characterized in that: The check valve comprises a check valve body (31), a limiting frame (33) and a ring plate (42); The limiting frame (33) and the ring plate (42) are fixedly arranged in the check valve body (31), and the check valve body (31) close to the limiting frame (33) is connected to the connecting pipe (27) on the injection cylinder (21); A sealing block (32) and a spring (34) are provided between the ring plate (42) and the limiting frame (33); One end of the spring (34) is connected to the limiting frame (33), and the other end is connected to the sealing block (32); When the spring (34) is in a balanced state, the sealing block (32) is in contact with the ring plate (42).

4. The negative pressure drainage device for auricle reconstruction according to claim 1, characterized in that: The drainage tube (5) comprises a liquid suction tube (52), a flushing tube (51) and a connector (54); The liquid suction tube (52) is located inside the flushing tube (51) and is fixedly connected to the flushing tube (51) via the connector (54). The length of the liquid suction tube (52) is not less than the length of the flushing tube (51). A plurality of drainage holes are provided on the liquid suction tube (52) outside the free end of the flushing tube (51).

5. The negative pressure drainage device for auricle reconstruction according to claim 4, characterized in that: The three-way valve comprises a three-way valve body (35), a valve core (39), a flushing joint (36) and an adjusting knob (37); The valve core (39) is sealed and rotatably mounted in the three-way valve body (35); a flushing flow channel (40) and a drainage flow channel (41) are provided through the valve core (39); sealing rings (38) are mounted on the valve core (39) on both sides of the flushing flow channel (40) and the drainage flow channel (41); the flushing connector (36) and the regulating knob (37) are both located on the outer wall of the three-way valve body (35); The regulating knob (37) is rotatably arranged on the outer wall of the three-way valve body (35) and is fixedly connected to the valve core (39); the flushing connector (36) is fixed on the outer wall of the three-way valve body (35); When the valve core (39) rotates, the injection cylinder (21) will be connected to the liquid suction tube (52), or the flushing joint (36) will be connected to the flushing tube (51).

6. The negative pressure drainage device for auricle reconstruction according to claim 2, characterized in that: The free end of the limiting column (26) is fixedly provided with an anti-slip block (29), and the material of the anti-slip block (29) is silica gel.

7. The negative pressure drainage device for auricle reconstruction according to claim 1, characterized in that: A piston (23) is fixedly provided at the end of the push rod (22) located in the injection cylinder (21), and the piston (23) is slidably sealed with the injection cylinder (21).

8. The negative pressure drainage device for auricle reconstruction according to claim 1, characterized in that: The fixing member (1) comprises a fixing patch (11), a buckle (12) is provided on the fixing patch (11), the buckle (12) is C-shaped and made of silicone, and the inner diameter of the buckle (12) is the same as the outer diameter of the injection barrel (21).

9. The negative pressure drainage device for auricle reconstruction according to claim 5, characterized in that: The diameter of the drainage tube (5) is 2 mm to 3 mm, and a plurality of drainage holes (53) are arranged on the flushing tube (51) along a spiral line, and the spacing between adjacent drainage holes (53) in the same spiral direction is 2 mm to 3 mm.

Images