An abdominal wound irrigation fluid leakage prevention negative pressure adsorption pad

Abstract

The present application relates to the technical field of medical devices, and discloses an abdominal wound irrigation fluid anti-leakage negative pressure adsorption pad, which comprises a special-shaped main body pad body, wherein the special-shaped main body pad body comprises an abdominal adhesion area, the upper surface of the abdominal adhesion area is provided with an arc-shaped micro-concave surface matched with the human body after lateral recumbence, a plurality of honeycomb flow guide holes are arranged through the arc-shaped micro-concave surface, four side edges of the abdominal adhesion area are fixedly connected with connecting ribs, one end of each connecting rib is fixedly connected with an outer frame support body, the bottom surface of the outer frame support body is sealingly connected with a pyramid-shaped liquid receiving hopper through a bolt, the bottom of the pyramid-shaped liquid receiving hopper is fixedly connected with a cannula, and the outer surface of the outer frame support body is sleeved with a flexible pad body. Through the anti-leakage flow guide and antibacterial design of the special-shaped main body pad body, combined with the efficient collection and convenient assembly structure of the negative pressure suction assembly, the present application realizes safe and rapid treatment of abdominal wound irrigation fluid, reduces the risk of infection, and improves the convenience of nursing and the cleanliness of the environment.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a negative pressure absorbent pad for preventing leakage of abdominal wound rinsing solution. Background Technology

[0002] In gynecological clinical nursing, the abdominal wound after a cesarean section is a key area for postoperative care. These wounds are mostly located in the midline of the abdomen, and the wound surface is delicate and easily contaminated. Therefore, regular irrigation and cleaning are necessary to reduce the risk of infection. In practice, the nursing process is mostly carried out on the gynecological examination bed. Nurses usually use a combination of glucose solution and special irrigation solution to irrigate the wound. However, due to the patient's limited physical activity after surgery, specific body positions such as lying on their side are required during irrigation. The location of the wound in the midline of the abdomen makes the irrigation solution prone to spreading to the side due to gravity, which can easily irritate the delicate skin around the wound and also poses a significant challenge to the precision of the nursing procedure.

[0003] In existing technologies, ordinary cotton or non-woven fabric nursing pads are often used in clinical settings to catch the liquid during the rinsing process. These nursing pads only have basic passive absorption functions, with limited absorption capacity and slow absorption speed. They are easily saturated during continuous wound rinsing. At the same time, these pads do not have a specific structural design adapted to the abdominal wound and the patient's position, and cannot effectively guide and concentrate the liquid flowing to the side. This often results in liquid leakage onto the patient's clothing and wetting of the treatment bed, which aggravates the physical discomfort after cesarean section and significantly increases the complexity of the nursing process, making it difficult to ensure the efficiency and comfort of wound rinsing care. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a leak-proof negative pressure adsorption pad for abdominal wound irrigation fluid. Through the leak-proof and antibacterial design of the irregularly shaped main body pad, combined with the efficient collection and convenient assembly structure of the negative pressure suction component, it enables safe and rapid treatment of abdominal wound irrigation fluid, reduces the risk of infection, improves nursing convenience and environmental cleanliness, and solves the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure adsorption pad for preventing leakage of abdominal wound irrigation fluid, comprising: an irregularly shaped main body pad, which includes an abdominal fitting area, the upper surface of which has an arc-shaped micro-concave surface that fits the abdomen of a person lying on their side, a plurality of honeycomb drainage holes being opened through the arc-shaped micro-concave surface, connecting ribs being fixedly connected to the four sides of the abdominal fitting area, an outer frame support being fixedly connected to one end of the connecting ribs, a pyramidal liquid receiving hopper being sealed to the bottom surface of the outer frame support by bolts, an insertion tube being fixedly connected to the bottom of the pyramidal liquid receiving hopper, and a flexible pad body being sleeved on the outer surface of the outer frame support; A negative pressure suction assembly includes a negative pressure tank, a one-way valve threaded to the bottom center of the negative pressure tank, a liquid receiving bag threaded to the bottom end of the one-way valve, a liquid receiving pipe threaded to the outer wall of the negative pressure tank, a pipe head fixedly connected to the top end of the liquid receiving pipe, a side lug fixedly connected to the outer wall of the pipe head, an eccentric wheel rotatably connected to the inner side of the side lug via a pin, and a lever fixedly connected to the outer wall of the eccentric wheel.

[0006] Preferably, the diameter of the honeycomb flow guide hole is 2mm-3mm, the center distance between two adjacent honeycomb flow guide holes is 4mm-5mm, and the inner wall of the honeycomb flow guide hole is coated with a silver ion hydrophobic antibacterial coating.

[0007] Preferably, the four sides of the abdominal fitting area are provided with guide slopes, and the height of the outer frame support is 3mm-5mm higher than the height of the abdominal fitting area to form an enclosed guide space. A rectangular leakage groove is formed between the four inner sides of the outer frame support and the four outer sides of the abdominal fitting area, and multiple connecting ribs are fixedly connected between them at equal intervals. The rectangular leakage groove is connected to a pyramidal liquid receiving hopper.

[0008] Preferably, a rectangular rubber sealing gasket is tightly fitted between the pyramidal liquid receiving hopper and the outer frame support. The inner wall of the pyramidal liquid receiving hopper is integrally formed with a straight guide groove. The depth of the straight guide groove is 1.5mm-2mm, which is used to accelerate the convergence of the flushing fluid to the insertion tube.

[0009] Preferably, the top surface of the flexible pad body is provided with a rectangular groove that matches the outer frame support, and the two apex corners of the rectangular groove are provided with handle holes for removing the outer frame support from the flexible pad body.

[0010] Preferably, the inner part of the abdominal contact area is a rigid support core layer, and the outer part is a flexible covering layer. The rigid support core layer is made of medical-grade modified polypropylene with a Shore hardness of D50-D55, which is used to provide the required support strength for the abdomen. The flexible covering layer is made of medical-grade liquid silicone, which covers the outer surface of the rigid support core layer and has a Shore hardness of A30-A35, which is used to improve the soft contact comfort when the abdomen is in contact.

[0011] Preferably, an annular groove is formed on the outer circumferential surface of the insertion tube, which is used to engage with the eccentric wheel. The bottom end of the insertion tube has two vertical grooves around its circumference, which are used to allow the eccentric wheel to pass smoothly during the docking of the insertion tube with the tube head.

[0012] Preferably, two through grooves are formed on the outer circumferential surface of the tube head, and two sets of side ears are integrally connected on the outer circumferential surface of the tube head, and a sealing ring is embedded in the inner bottom surface of the tube head.

[0013] Preferably, the negative pressure suction assembly further includes a bucket lid and a support frame. The bucket lid is detachably connected to the top of the negative pressure bucket via a snap fastener, and a filter element frame is threadedly connected to the center of the lower surface of the bucket lid. A waterproof core is fitted inside the filter element frame, and a negative pressure inlet pipe is fixedly connected to the center of the top surface of the bucket lid.

[0014] Preferably, the top of the support frame supports the negative pressure tank, the waterproof core is made of pleated polytetrafluoroethylene hydrophobic and breathable membrane material with a membrane pore size of 0.22μm-0.45μm, and a waterproof sealing gasket is tightly fitted between the top of the waterproof core and the lower surface of the tank lid.

[0015] Compared with the prior art, the present invention provides a negative pressure adsorption pad for preventing leakage of abdominal wound irrigation solution, which has the following beneficial effects: 1. The irregularly shaped main body pad of this invention, through its arc-shaped micro-concave surface design that conforms to the human body's side-lying posture, can closely fit the abdominal skin. Combined with reasonably sized drainage holes and an enclosed drainage space, it can achieve rapid guidance and centralized flow of irrigation fluid, effectively preventing liquid from accumulating on the contact surface or leaking to the side, thus solving the drawbacks of traditional nursing pads that are slow to absorb liquid and prone to leakage. At the same time, the silver ion hydrophobic antibacterial coating on the inner wall of the drainage holes can inhibit bacterial growth with the help of silver ions, reduce the risk of wound infection, and reduce liquid residue through hydrophobicity, thereby improving drainage efficiency. It takes into account both drainage stability and antibacterial safety, providing a clean guarantee for wound care and adapting to the postoperative patient's side-lying position requirements.

[0016] 2. This invention, by incorporating a negative pressure suction component, utilizes the continuous effect of a negative pressure environment to rapidly draw the collected flushing fluid into the collection device, significantly improving fluid collection efficiency and preventing residual fluid from contaminating the nursing environment. The component employs a quick-connect locking structure, allowing for tubing assembly without additional tools, simplifying medical procedures and improving nursing preparation efficiency. Simultaneously, the design of the one-way valve and waterproof core ensures unidirectional fluid flow, preventing backflow contamination, while also guaranteeing the stability of negative pressure conduction and preventing fluid from entering the negative pressure device. The overall structure balances collection efficiency, ease of operation, and safety, meeting the high-efficiency nursing needs of clinical wound irrigation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the exploded disassembly of the irregularly shaped main body pad in this invention; Figure 3 This is a cross-sectional perspective view of the abdominal fitting area and the outer frame support in this invention; Figure 4 This is a perspective view of the negative pressure suction component in this invention; Figure 5This is an exploded view of the negative pressure suction component in this invention; Figure 6 This is a cross-sectional view of the cannula, cannula head, and other components in this invention; Figure 7 For the present invention Figure 5 A magnified view of part A in the diagram.

[0018] The components include: 1. Irregularly shaped main body pad; 11. Abdominal fitting area; 12. Honeycomb drainage holes; 13. Connecting ribs; 14. Outer frame support; 15. Pyramidal liquid receiving hopper; 16. Insertion tube; 17. Flexible pad body; 2. Negative pressure suction assembly; 21. Negative pressure tank; 22. One-way valve; 23. Liquid receiving bag; 24. Liquid receiving pipe; 25. Pipe head; 26. Side ear; 27. Eccentric wheel; 28. Lever; 29. ​​Tank lid; 210. Support frame; 211. Filter element frame; 212. Waterproof core. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 The present invention provides an anti-leakage negative pressure adsorption pad for abdominal wound irrigation fluid, comprising: an irregularly shaped main body pad 1, which includes an abdominal fitting area 11. The upper surface of the abdominal fitting area 11 has an arc-shaped micro-concave surface that fits the abdomen of a person lying on their side. Multiple honeycomb drainage holes 12 are opened through the arc-shaped micro-concave surface. Connecting ribs 13 are fixedly connected to the four sides of the abdominal fitting area 11. One end of the connecting rib 13 is fixedly connected to an outer frame support body 14. The bottom surface of the outer frame support body 14 is sealed with a pyramidal liquid receiving hopper 15 by bolts. An insertion tube 16 is fixedly connected to the bottom of the pyramidal liquid receiving hopper 15. A flexible pad body 17 is sleeved on the outer surface of the outer frame support body 14. The negative pressure suction assembly 2 includes a negative pressure tank 21. A one-way valve 22 is threadedly connected to the bottom center of the negative pressure tank 21. A liquid receiving bag 23 is threadedly connected to the bottom end of the one-way valve 22. A liquid receiving pipe 24 is threadedly connected to the outer wall of the negative pressure tank 21. A pipe head 25 is fixedly connected to the top end of the liquid receiving pipe 24. A side ear 26 is fixedly connected to the outer wall of the pipe head 25. An eccentric wheel 27 is rotatably connected to the inner side of the side ear 26 via a pin. A lever 28 is fixedly connected to the outer wall of the eccentric wheel 27.

[0021] Furthermore, the diameter of the honeycomb flow guide hole 12 is 2mm-3mm, the center-to-center distance between two adjacent honeycomb flow guide holes 12 is 4mm-5mm, and the inner wall of the honeycomb flow guide hole 12 is coated with a silver ion hydrophobic antibacterial coating.

[0022] By setting the diameter of the honeycomb drainage holes 12 to 2mm-3mm, the irrigation fluid can pass smoothly and flow quickly downwards during the rinsing of the abdominal wound, allowing it to fall into the pyramidal receiving hopper 15 below, thus preventing fluid accumulation on the surface of the abdominal contact area 11. This size also creates a reasonable support structure. Combined with an adjacent center-to-center spacing of 4mm-5mm, the drainage holes are evenly distributed across the abdominal contact area 11. This ensures that the drainage holes are neither too close together, resulting in insufficient support strength, nor too far apart, affecting the drainage coverage, thus ensuring that the irrigation fluid in different areas receives adequate fluid. The fluid is promptly incorporated into the subsequent drainage structure. The silver ion hydrophobic antibacterial coating on the inner wall of the honeycomb drainage holes 12 effectively inhibits bacterial growth around the wound and inside the drainage holes through the antibacterial properties of silver ions, reducing the risk of wound infection. On the other hand, the hydrophobic coating reduces the adsorption residue of the rinsing fluid on the hole wall, accelerates the fluid flow efficiency, and prevents residual fluid from breeding bacteria, further ensuring the safety and cleanliness of wound care. The overall design takes into account the drainage efficiency, support stability, and antibacterial and infection prevention requirements, effectively solving the problems of slow fluid absorption, easy leakage, and difficulty in antibacterial properties of traditional nursing pads.

[0023] Furthermore, the four sides of the abdominal fitting area 11 are provided with guide slopes, and the height of the outer frame support 14 is 3mm-5mm higher than the height of the abdominal fitting area 11 to form an enclosed guide space. A rectangular leakage groove is formed between the four inner sides of the outer frame support 14 and the four outer sides of the abdominal fitting area 11, and multiple connecting ribs 13 are fixedly connected between them at equal intervals. The rectangular leakage groove is connected to the pyramidal liquid receiving hopper 15.

[0024] During the rinsing of the abdominal wound, if the rinsing is too rapid and the honeycomb drainage holes 12 cannot drain the rinsing fluid in time, the rinsing fluid will overflow around the top surface of the abdominal fitting area 11. At this time, the guide slopes on the four sides of the abdominal fitting area 11 can guide the rinsing fluid to flow towards the edges, preventing the liquid from stagnating and accumulating on the surface of the fitting area. The enclosed drainage space formed by the outer frame support 14 being 3mm-5mm higher than the abdominal fitting area 11 can effectively prevent the rinsing fluid from flowing to the sides of the body, structurally preventing the liquid from leaking into clothing or the flexible pad body 17. The rectangular leakage groove formed between the outer frame support 14 and the abdominal fitting area 11 serves as a guide. The incoming liquid provides a centralized channel, and the multiple connecting ribs 13 arranged at equal intervals ensure the connection stability between the outer frame support 14 and the abdominal contact area 11 without obstructing the flow of liquid. The design of the rectangular leakage trough and the pyramidal liquid receiving hopper 15 allows the concentrated rinsing liquid to be smoothly introduced into the pyramidal liquid receiving hopper 15, and finally, with the help of the subsequent negative pressure component, completes efficient collection. The entire structural design forms a complete liquid treatment path of "guidance-enclosure-concentration-drainage", which is perfectly adapted to the nursing position of the patient lying on their side. It solves the drawback of traditional nursing pads that cannot effectively restrain and guide liquid, and improves the accuracy and convenience of wound rinsing care.

[0025] Furthermore, a rectangular rubber sealing gasket is tightly fitted between the pyramidal liquid receiving hopper 15 and the outer frame support 14. The inner wall of the pyramidal liquid receiving hopper 15 is integrally formed with a straight guide groove with a depth of 1.5mm-2mm, which is used to accelerate the convergence of flushing fluid to the insertion tube 16.

[0026] The rectangular rubber sealing gasket that fits tightly between the pyramidal liquid receiving hopper 15 and the outer frame support 14 effectively prevents leakage of the irrigation fluid at the connection gap, ensuring the sealing and integrity of the fluid collection and preventing leakage from affecting the cleanliness of the nursing environment. The pyramidal structure itself has a natural converging and guiding advantage. Combined with the 1.5mm-2mm deep linear guide channel integrally formed on the inner wall, it can further optimize the fluid flow path, reduce the time the irrigation fluid stays on the inner wall of the pyramidal liquid receiving hopper 15, and significantly increase the convergence speed of the fluid to the bottom insertion tube 16. This ensures that the irrigation fluid flowing in from the rectangular leakage channel can quickly and smoothly enter the subsequent receiving tube 24 and other components. It not only avoids the risk of leakage caused by the accumulation of fluid in the pyramidal liquid receiving hopper 15, but also achieves efficient collection with the negative pressure suction function, further ensuring the continuity and convenience of wound irrigation care.

[0027] Furthermore, the top surface of the flexible pad body 17 is provided with a rectangular groove that matches the outer frame support body 14, and the two top corners of the rectangular groove are provided with handle holes for removing the outer frame support body 14 from the flexible pad body 17.

[0028] The flexible pad body 17 is placed on the treatment bed to support the legs and head, excluding the abdomen. The top surface of the flexible pad body 17 has a rectangular groove that matches the outer frame support 14, enabling precise alignment and stable connection between the outer frame support 14 and the flexible pad body 17. This ensures the overall stability of the irregular-shaped main body pad 1 and allows the flexible pad body 17 to better fit the outer frame support 14 and the contact area with the human body, improving the neatness and comfort during use. The handle holes at the two top corners of the rectangular groove provide convenient leverage points for separating the outer frame support 14 from the flexible pad body 17. Medical staff can easily remove the outer frame support 14 from the flexible pad body 17 without the need for additional tools, facilitating subsequent cleaning or maintenance of the flexible pad body 17 or the irregular-shaped main body pad 1. This greatly simplifies the operation process and improves the efficiency of nursing work.

[0029] Furthermore, the abdominal contact area 11 of the irregularly shaped main body pad 1 adopts a composite material structure of "rigid support core layer + flexible covering layer"; wherein, the rigid support core layer is medical modified polypropylene material with a Shore hardness of D50-D55, which is used to provide the required support strength for the abdomen; the flexible covering layer is medical liquid silicone material, which covers the outer surface of the rigid support core layer with a Shore hardness of A30-A35, which is used to improve the flexible contact comfort when the abdomen is in contact.

[0030] The rigid support core layer (medical-grade modified polypropylene, Shore hardness D50-D55) provides stable support, preventing deformation of the abdominal contact area and ensuring the normal operation of the drainage structure; the flexible covering layer (medical-grade liquid silicone, Shore hardness A30-A35) is in direct contact with the skin, soft and comfortable, reducing friction and irritation to the delicate skin around the wound. The combination of the two takes into account both support stability and contact comfort, meeting the postoperative care needs of patients.

[0031] Furthermore, an annular groove is provided on the outer circumferential surface of the insertion tube 16, which is used to engage with the eccentric wheel 27. Two vertical grooves are provided around the bottom end of the insertion tube 16 in the circumferential direction, which are used to allow the eccentric wheel 27 to pass smoothly during the docking process between the insertion tube 16 and the tube head 25.

[0032] Furthermore, two through grooves are formed on the outer circumferential surface of the tube head 25, and two sets of side ears 26 are integrally connected on the outer circumferential surface of the tube head 25, and a sealing ring is embedded in the inner bottom surface of the tube head 25.

[0033] When the cannula 16 and the tube head 25 are connected, the cannula 16 is inserted into the tube head 25. At this time, it is ensured that the two vertical grooves at the bottom of the cannula 16 correspond to the directions of the two eccentric wheels 27, so that the cannula 16 will not be obstructed by the eccentric wheels 27 during insertion. Once the cannula 16 touches the sealing ring inside the tube head 25, the tube head 25 is rotated. Then, the lever 28 is rotated to drive the eccentric wheels 27 to rotate. The eccentric wheels 27 will then be locked into the annular groove on the outer circumference of the cannula 16. This design allows medical staff to quickly complete the assembly of the two parts without the need for additional tools, simply by aligning, inserting, and rotating. This greatly improves the efficiency of nursing preparation. At the same time, the sealing ring inside the tube head 25 can ensure the sealing of the connection and prevent the irrigation fluid from leaking. The symmetrical arrangement of the two sets of side ears 26 and the eccentric wheels 27 further enhances the connection stability and ensures that the two parts will not separate during negative pressure suction. This perfectly meets the efficient and reliable connection requirements of clinical wound irrigation.

[0034] Furthermore, the negative pressure suction assembly 2 also includes a bucket lid 29 and a support frame 210. The bucket lid 29 is detachably connected to the top of the negative pressure bucket 21 via a snap fastener, and a filter element frame 211 is threadedly connected to the center of the lower surface of the bucket lid 29. A waterproof core 212 is sleeved inside the filter element frame 211, and a negative pressure inlet pipe is fixedly connected to the center of the top surface of the bucket lid 29.

[0035] Furthermore, the top of the support frame 210 supports the negative pressure tank 21, and the waterproof core 212 is made of a pleated polytetrafluoroethylene hydrophobic and breathable membrane material with a membrane pore size of 0.22μm-0.45μm. A waterproof sealing gasket is tightly fitted between the top of the waterproof core 212 and the lower surface of the tank cover 29.

[0036] When the negative pressure inlet tube, fixedly connected to the center of the top surface of the lid 29, is connected to a commonly used negative pressure aspirator, the aspirator, once activated, will deliver negative pressure into the negative pressure tank 21 through the inlet tube, creating a stable negative pressure environment inside the tank 21. At this time, the negative pressure will be transmitted to the tube head 25 via the liquid receiving tube 24 threaded to the negative pressure tank 21, and then conducted through the sealed connection structure between the tube head 25 and the insertion tube 16 to the pyramidal liquid receiving hopper 15. This generates continuous suction on the rinsing fluid collected in the irregularly shaped main body pad 1, causing the rinsing fluid in the abdominal contact area 11 to converge into the pyramidal liquid receiving hopper 15 through the honeycomb drainage holes 12 and the rectangular leakage channel, and then rapidly flow into the negative pressure tank 21 via the liquid receiving tube 24. During the process, the waterproof core 212 inside the filter frame 211 below the lid 29 plays a role in hydrophobic and breathable conduction, ensuring smooth negative pressure transmission and preventing the flushing fluid from entering the negative pressure inlet pipe. Combined with the waterproof sealing gasket, it further enhances the sealing and leak-proof effect. The one-way valve 22 at the bottom of the negative pressure tank 21 guides the flushing fluid entering the negative pressure tank 21 into the receiving bag 23 in a one-way direction, preventing liquid backflow. At the same time, the support frame 210 stably supports the negative pressure tank 21, ensuring that the entire negative pressure suction process is stable and efficient, realizing the rapid collection and sealed storage of the flushing fluid. The overall structure effectively prevents flushing fluid leakage and ensures a clean treatment environment; the adsorption and collection are highly efficient, with no liquid accumulation.

[0037] In use, first place the flexible pad body 17 on the bed frame of the treatment bed, then fit the outer frame support 14 of the irregular main body pad 1 into the rectangular groove of the flexible pad body 17 to complete the positioning, and let the patient lie on their side so that the abdominal wound corresponds to the abdominal fitting area 11; then complete the assembly of the negative pressure suction component 2, connect the liquid receiving bag 23 to the bottom of the negative pressure tank 21 through the one-way valve 22, install the tank cover 29 on the top of the negative pressure tank 21 through the buckle, and then connect the liquid receiving tube 24 to the outer wall of the negative pressure tank 21 through the thread. Next, connect the tube head 25 at the top of the liquid receiving tube 24 to the insertion tube 16 at the bottom of the pyramidal liquid receiving hopper 15, so that the vertical groove at the bottom of the insertion tube 16 is aligned with the eccentric wheel 27 of the tube head 25 and inserted to touch the sealing ring inside the tube head 25. After rotating the tube head 25, move the lever 28 to drive the eccentric wheel 27 to rotate, so that the eccentric wheel 27 is engaged with the insertion tube 16. The annular groove is securely locked; then the negative pressure inlet tube on the top surface of the lid 29 is connected to the clinical negative pressure aspirator, and the negative pressure aspirator is started to create a stable negative pressure environment in the negative pressure tank 21. At this time, the abdominal wound irrigation operation can be carried out. The irrigation fluid is quickly guided through the honeycomb guide hole 12 of the abdominal fitting area 11. The irrigation fluid that does not pass through the guide hole in time flows into the rectangular leakage trough through the side guide slope of the abdominal fitting area 11. Finally, it all flows into the pyramidal liquid receiving hopper 15 and enters the negative pressure tank 21 through the insertion tube 16 and the liquid receiving tube 24. Then, it flows into the liquid receiving bag 23 in one direction through the one-way valve 22. After use, the lever 28 is reversed to unlock the eccentric wheel 27, the insertion tube 16 and the tube head 25 are separated, the liquid receiving bag 23 is removed for processing, and then the various parts of the negative pressure aspiration assembly 2, the irregular main body pad 1 and the flexible pad body 17 are disassembled and cleaned or maintained respectively.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure absorbent pad for preventing leakage of abdominal wound irrigation solution, characterized in that, include: The irregular body pad (1) includes an abdominal fitting area (11). The upper surface of the abdominal fitting area (11) has an arc-shaped micro-concave surface that fits the abdomen of a person lying on their side. Multiple honeycomb drainage holes (12) are opened through the arc-shaped micro-concave surface. Connecting ribs (13) are fixedly connected to the four sides of the abdominal fitting area (11). One end of the connecting rib (13) is fixedly connected to an outer frame support (14). The bottom surface of the outer frame support (14) is sealed with a pyramidal liquid receiving hopper (15) by bolts. An insertion tube (16) is fixedly connected to the bottom of the pyramidal liquid receiving hopper (15). A flexible pad body (17) is sleeved on the outer surface of the outer frame support (14). The negative pressure suction assembly (2) includes a negative pressure tank (21), a one-way valve (22) is threaded to the bottom center of the negative pressure tank (21), a liquid receiving bag (23) is threaded to the bottom end of the one-way valve (22), a liquid receiving pipe (24) is threaded to the outer wall of the negative pressure tank (21), a pipe head (25) is fixedly connected to the top end of the liquid receiving pipe (24), a side ear (26) is fixedly connected to the outer wall of the pipe head (25), an eccentric wheel (27) is rotatably connected to the inner side of the side ear (26) through a pin, and a lever (28) is fixedly connected to the outer wall of the eccentric wheel (27).

2. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: The diameter of the honeycomb flow guide hole (12) is 2mm-3mm, the center distance between two adjacent honeycomb flow guide holes (12) is 4mm-5mm, and the inner wall of the honeycomb flow guide hole (12) is coated with a silver ion hydrophobic antibacterial coating.

3. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: The abdominal fitting area (11) has four sides with guide slopes. The height of the outer frame support (14) is 3mm-5mm higher than the height of the abdominal fitting area (11) to form an enclosed guide space. The four inner sides of the outer frame support (14) and the four outer sides of the abdominal fitting area (11) form a rectangular leakage groove, and multiple connecting ribs (13) are fixedly connected at equal intervals between them. The rectangular leakage groove is connected to the pyramidal liquid receiving hopper (15).

4. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: A rectangular rubber sealing gasket is tightly fitted between the pyramidal liquid receiving hopper (15) and the outer frame support (14). The inner wall of the pyramidal liquid receiving hopper (15) is integrally formed with a straight flow guide groove. The depth of the straight flow guide groove is 1.5mm-2mm, which is used to accelerate the convergence of the flushing liquid to the insertion tube (16).

5. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: The top surface of the flexible pad body (17) is provided with a rectangular groove that matches the outer frame support (14), and the two top corners of the rectangular groove are provided with handle holes, which are used to remove the outer frame support (14) from the flexible pad body (17).

6. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: The abdominal fitting area (11) has a rigid support core layer inside and a flexible covering layer outside. The rigid support core layer is made of medical modified polypropylene with a Shore hardness of D50-D55, which is used to provide the required support strength for the abdomen. The flexible covering layer is made of medical liquid silicone, which covers the outer surface of the rigid support core layer with a Shore hardness of A30-A35, which is used to improve the comfort of flexible contact when fitting the abdomen.

7. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: The outer circumferential surface of the insertion tube (16) is provided with an annular groove, which is used to engage with the eccentric wheel (27). The bottom end of the insertion tube (16) is provided with two vertical grooves around its circumference, which are used to allow the eccentric wheel (27) to pass smoothly during the docking process between the insertion tube (16) and the tube head (25).

8. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 1, characterized in that: Two through slots are opened on the outer circumferential surface of the tube head (25) around its circumference, and two sets of side ears (26) are integrally connected on the outer circumferential surface of the tube head (25) around its circumference. A sealing ring is embedded in the inner bottom surface of the tube head (25).

9. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation solution according to claim 1, characterized in that: The negative pressure suction assembly (2) also includes a bucket lid (29) and a support frame (210). The bucket lid (29) is detachably connected to the top of the negative pressure bucket (21) by a buckle. A filter element frame (211) is threadedly connected to the center of the lower surface of the bucket lid (29). A waterproof core (212) is sleeved inside the filter element frame (211). A negative pressure inlet pipe is fixedly connected to the center of the top surface of the bucket lid (29).

10. The anti-leakage negative pressure absorbent pad for abdominal wound irrigation fluid according to claim 9, characterized in that: The top of the support frame (210) supports the negative pressure tank (21). The waterproof core (212) is made of pleated polytetrafluoroethylene hydrophobic and breathable membrane material with a membrane pore size of 0.22μm-0.45μm. A waterproof sealing gasket is tightly attached between the top of the waterproof core (212) and the lower surface of the bucket lid (29).

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