A device for collecting exudate around a drainage tube and protecting the skin

Abstract

This application relates to the field of medical and nursing consumables technology, specifically a device for collecting and protecting exudate around a drainage tube. It is placed on the skin surface at the outlet of a patient's drainage tube to actively absorb exudate, reducing the risk of exudate overflowing along the dressing edges and spreading along the abdominal wall. The structure includes: an adhesive dressing layer, which is an absorbent adhesive dressing layer with clearance holes, and one side of the adhesive dressing layer is the adhesive surface; an absorbent box, which is disposed on the adhesive dressing layer, with one side of the absorbent box adhering to the side of the adhesive dressing layer opposite to the adhesive surface, the absorbent box having a reservoir cavity inside, and an absorbent hole on the side of the absorbent box adhering to the adhesive dressing layer, the absorbent hole extending from the reservoir cavity to the adhesive dressing layer; an anti-backflow device, disposed on the absorbent box to prevent liquid in the reservoir cavity from flowing to the adhesive dressing layer; and a negative pressure device, disposed on the absorbent box to apply negative pressure to the reservoir cavity.

Description

Technical Field

[0001] This application relates to the field of medical care consumables technology, and in particular to a device for collecting exudate around a drainage tube and protecting the skin. Background Technology

[0002] After hepatobiliary and pancreatic surgeries (such as pancreaticoduodenectomy, hepatectomy, choledochoenterostomy, etc.), patients often require various drainage tubes, such as abdominal drainage tubes, T-tubes, and peripancreatic drainage tubes, to drain intra-abdominal fluid, blood, bile, or pancreatic juice and to monitor for postoperative complications. The drainage tube is usually brought out through a small incision in the abdominal wall (puncture hole or purse-string suture). Due to the approximately 0.5–2 mm annular gap between the outer wall of the drainage tube and the abdominal wall tissue, coupled with early postoperative intra-abdominal pressure changes, patient position changes, and the traction of the drainage tube itself, this gap is difficult to close completely, becoming a channel for continuous leakage of fluid.

[0003] For patients who develop pancreatic fistula, bile fistula, or lymphatic fistula after surgery, the problem of peritumoral drainage is particularly prominent. The drainage is often thin, contains digestive enzymes (such as trypsin and bile salts) or high concentrations of electrolytes, and is highly corrosive and irritating. Daily drainage volume can reach 50–200 ml and can persist for several days to weeks. After seeping from the small abdominal wall incision, the drainage first infiltrates the skin around the incision and then spreads outwards along the abdominal wall.

[0004] Current routine clinical nursing care involves covering the percutaneous tube with multiple layers of sterile gauze or foam absorbent dressings, followed by an outer layer of transparent film dressing or adhesive tape for fixation. However, the absorption capacity of gauze or foam dressings is limited, thus this method has some significant problems, such as: First, gauze or foam dressings have limited absorption capacity. Once the exudate has soaked through, the dressing reaches its absorption saturation point, and subsequent exudate is no longer absorbed but overflows along the edges of the dressing, staining the patient's clothing and bedding, increasing discomfort and the burden of nursing care. Nursing staff need to change dressings frequently every day, which significantly increases the workload of clinical nursing, and the frequent operations repeatedly disturb the patient's rest.

[0005] Secondly, the moistened dressing adheres closely to the skin, creating a warm, humid microenvironment that promotes microbial growth. Furthermore, the pericoronary skin, constantly exposed to moisture, suffers from impaired stratum corneum barrier function. Combined with the chemical corrosive effects of digestive enzymes, this often leads to redness, swelling, maceration, erosion, and even ulceration, causing severe pain and itching for patients. It also increases the risk of pericoronary infection and deep incision infection.

[0006] Therefore, a protective device was specially designed to actively absorb a large amount of exudate around the small incision on the abdominal wall (the outlet of the patient's drainage tube). Summary of the Invention

[0007] The purpose of this application is to propose a drainage tube exudate collection and skin protection device, which is placed on the skin surface at the outlet of the patient's drainage tube to actively absorb the exudate at the outlet and reduce the risk of exudate overflowing along the dressing edge and spreading along the abdominal wall.

[0008] To achieve the above objectives, this application adopts the following technical solution: A device for collecting exudate around a drainage tube and protecting the skin includes: an adhesive dressing layer, which is an absorbent adhesive dressing layer with clearance holes, and one side of the adhesive dressing layer being an adhesive surface; an absorbent box, which is disposed on the adhesive dressing layer, with one side of the absorbent box adhering to the side of the adhesive dressing layer opposite to the adhesive surface, the absorbent box having a storage cavity inside, and an absorbent hole on the side of the absorbent box adhering to the adhesive dressing layer, the absorbent hole penetrating from the storage cavity to the adhesive dressing layer; an anti-backflow device, which is disposed on the absorbent box to prevent the flow of liquid in the storage cavity to the adhesive dressing layer; and a negative pressure device, which is disposed on the absorbent box to apply negative pressure to the storage cavity; the device absorbs liquid through the adhesive dressing layer and applies negative pressure to the storage cavity through the negative pressure device to draw the liquid absorbed by the adhesive dressing layer into the storage cavity through the absorbent hole, and prevents the liquid in the storage cavity from flowing back to the adhesive dressing layer through the anti-backflow device.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the adhesive layer is provided with a slit, the slit is cut from the outer edge of the adhesive layer to the clearance hole; the absorbent box is C-shaped, the absorbent box surrounds the clearance hole, and the two ends of the absorbent box are brought together to form a ring.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the two ends of the suction box are aligned with the cut, and the adhesive layer has an allowance extending to the opposite side on one or both sides of the cut.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: an absorbent cotton ring is provided on the side of the adhesive layer adjacent to the avoidance hole, and an adhesive ring is provided on the side of the absorbent cotton ring away from the avoidance hole, with the liquid absorption hole facing the absorbent cotton ring.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the anti-backflow device includes absorbent cotton installed in the liquid storage chamber.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: the absorbent cotton is laid on the side of the liquid storage cavity with the liquid absorption hole, and there is a gap between the absorbent cotton and the side of the liquid storage cavity opposite to the liquid absorption hole.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: each suction hole is provided with a capillary tube that connects to the suction hole, and the capillary tube extends toward the side of the liquid storage chamber opposite to the suction hole.

[0015] Based on the above scheme and as a preferred option, the capillary inner pore diameter is 0.2mm-1mm.

[0016] Based on the above scheme and as a preferred embodiment of the above scheme: the negative pressure device includes a connecting pipe installed on the liquid suction box, one end of the connecting pipe is connected to the liquid storage chamber, and the other end is provided with a balloon for unidirectional air extraction away from the liquid storage chamber.

[0017] Based on the above scheme and as a preferred option: the liquid suction box is provided with a drain port that can be opened and closed.

[0018] This application has the following beneficial effects: The working principle of this drainage tube periapical exudate collection and skin protection device is based on a synergistic working mechanism that combines negative pressure active drainage with passive absorption by dressings.

[0019] During use, the adhesive dressing layer is applied to the skin surface at the outlet of the patient's drainage tube, and is fixed to the skin by the adhesive surface. A clearance hole surrounds the drainage tube at the outlet. Exudate around the drainage tube first comes into contact with the absorbent adhesive dressing layer. The absorbent material absorbs the exudate through capillary action and temporarily stores it in the dressing layer. Simultaneously, a negative pressure device applies negative pressure to the reservoir chamber of the suction box, creating a negative pressure environment inside the reservoir chamber lower than the external atmospheric pressure. Driven by this pressure difference, the liquid absorbed in the adhesive dressing layer is drawn into the reservoir chamber through the suction holes. An anti-backflow device is installed inside the reservoir chamber or in the liquid flow path to ensure that after the liquid flows from the adhesive dressing layer into the reservoir chamber, the liquid already collected in the reservoir chamber does not flow back into the adhesive dressing layer.

[0020] This drainage tube exudate collection and skin protection device combines the active absorption of the adhesive dressing layer with the active suction of the negative pressure device. This enables timely, continuous, and efficient collection of exudate around the drainage tube, preventing prolonged and excessive retention of exudate on the skin surface, which could lead to overflow along the dressing edges or spread along the abdominal wall. The negative pressure suction effectively reduces maceration of the skin around the drainage tube, lowering the risk of irritant dermatitis and infection. The anti-reflux device prevents backflow of collected fluid, ensuring unidirectional drainage and avoiding secondary contamination. The compact design allows for close-fitting use, providing patients with continuous exudate management and reducing the frequency of dressing changes. This reduces patient discomfort and the burden of nursing care, while also lowering the risk of peri-drainage tube infection and deep incision infection.

[0021] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be further described in detail below with reference to figures. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the drainage tube exudate collection and skin protection device of this application; Figure 2 Another perspective schematic diagram of the drainage tube exudate collection and skin protection device of this application; Figure 3 This is a partial cross-sectional schematic diagram of the drainage tube exudate collection and skin protection device of this application; Figure 4 This is a schematic diagram of the top of the aspiration box of this application after being cut open. Figure 1 The diagram does not include capillary tubes. Figure 5 This is a schematic diagram of the top of the aspiration box of this application after being cut open. Figure 2 The diagram shows capillary tubes. Figure 6 This is a schematic diagram of the adhesive layer in this application.

[0024] Explanation of reference numerals in the attached figures: 100. Adhesive layer; 101. Clearance hole; 102. Adhesive surface; 103. Protective film; 104. Cut; 105. Absorbent cotton ring layer; 106. Adhesive ring layer; 200. Liquid suction box; 201. Liquid storage chamber; 202. Liquid suction hole; 300. Anti-backflow device; 301. Absorbent cotton; 302. Capillary tube; 400. Negative pressure device; 401. Negative pressure interface; 402. Connecting pipeline; 403. Bulb; 500. Drainage port; 501. Drainage hole; 502. Drainage pipe; 503. Plug. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0027] Following hepatobiliary and pancreatic surgeries (such as pancreaticoduodenectomy, hepatectomy, and choledochoenterostomy), patients often require various drainage tubes, including abdominal drainage tubes, T-tubes, and peripancreatic drainage tubes, to drain intra-abdominal fluid, blood, bile, or pancreatic juice and to monitor for postoperative complications. The drainage tube is usually exited through a small incision in the abdominal wall (puncture hole or purse-string suture). Due to the approximately 0.5mm-2mm annular gap between the outer wall of the drainage tube and the abdominal wall tissue, coupled with early postoperative intra-abdominal pressure changes, patient positioning, and the traction of the drainage tube itself, this gap is difficult to completely close, becoming a channel for continuous extravasation of fluid. Current routine clinical nursing measures involve covering the tube with multiple layers of sterile gauze or foam absorbent dressings, and then securing it with a transparent film dressing or adhesive tape. However, the absorption capacity of gauze or foam dressings is limited, and exudate may overflow along the dressing edges and spread along the abdominal wall.

[0028] See Figures 1-6 This application discloses a device for collecting exudate around a drainage tube and protecting the skin, which is placed on the skin surface at the outlet of the patient's drainage tube. By actively absorbing the exudate at the outlet, it reduces the risk of exudate overflowing along the edge of the dressing and spreading to the surrounding area along the abdominal wall.

[0029] In the embodiments of this disclosure, such as Figure 1 , Figure 2 , Figure 3 As shown, the drainage tube surrounding exudate collection and skin protection device includes an adhesive dressing layer 100, an absorptive box 200, an anti-backflow device 300, and a negative pressure device 400.

[0030] The adhesive layer 100 is an absorbent adhesive layer 100, which has clearance holes 101 and one side of the adhesive layer 100 is an adhesive surface 102. This adhesive surface 102 is also provided with a peelable protective film 103. A liquid absorption box 200 is attached to the adhesive layer 100 by adhesive bonding, with one side of the liquid absorption box 200 adhering to the side of the adhesive layer 100 opposite to the adhesive surface 102. The liquid absorption box 200 has a liquid storage chamber 201 inside, and a liquid absorption hole 202 is provided on the side of the liquid absorption box 200 adhering to the adhesive layer 100, extending from the liquid storage chamber 201 to the adhesive layer 100. An anti-backflow device 300 is provided on the liquid absorption box 200 to prevent liquid in the liquid storage chamber 201 from flowing to the adhesive layer 100. A negative pressure device 400 is provided on the liquid suction box 200 to apply negative pressure to the liquid storage chamber 201.

[0031] During operation, the adhesive layer 100 absorbs liquid, and the negative pressure device 400 applies negative pressure to the liquid storage chamber 201 to draw the liquid absorbed by the adhesive layer 100 into the liquid storage chamber 201 through the liquid suction hole 202. The anti-backflow device 300 prevents the liquid in the liquid storage chamber 201 from flowing back to the adhesive layer 100. The liquid suction hole 202, due to its small pore size, such as 0.3mm-2mm, also has the ability to impede the flow of liquid even without external conditions, that is, to prevent the liquid in the liquid storage chamber 201 from flowing back to the adhesive layer 100.

[0032] The working principle of this drainage tube periapical exudate collection and skin protection device is based on a synergistic working mechanism that combines negative pressure active drainage with passive absorption by dressings.

[0033] In use, the adhesive dressing 100 is attached to the skin surface at the outlet of the patient's drainage tube and fixed to the skin by the adhesive surface 102. The clearance hole 101 surrounds the drainage tube at the outlet. Liquid seeping from around the drainage tube first comes into contact with the absorbent adhesive dressing 100. The absorbent material absorbs the seepage through capillary action and temporarily stores it in the dressing. Simultaneously, the negative pressure device 400 applies negative pressure to the reservoir chamber 201 of the suction box 200, creating a negative pressure environment inside the reservoir chamber 201 lower than the external atmospheric pressure. Driven by the pressure difference, the liquid absorbed in the adhesive dressing 100 is drawn into the reservoir chamber 201 through the suction hole 202. An anti-backflow device 300 is installed inside the reservoir chamber 201 or along the liquid flow path to prevent the collected liquid in the reservoir chamber 201 from flowing back into the adhesive dressing 100 after flowing from the adhesive dressing 100 into the reservoir chamber 201.

[0034] This drainage tube exudate collection and skin protection device combines the active absorption of the adhesive dressing layer 100 with the active suction of the negative pressure device 400. This enables timely, continuous, and efficient collection of exudate around the drainage tube, preventing prolonged and excessive retention of exudate on the skin surface, which could lead to overflow along the dressing edges or spread along the abdominal wall. The negative pressure suction effectively reduces maceration of the skin around the drainage tube, lowering the risk of irritant dermatitis and infection. The anti-reflux device 300 prevents backflow of collected fluid, ensuring unidirectional drainage and preventing secondary contamination. The compact design of the entire device allows for close skin contact, providing patients with continuous exudate management and reducing the frequency of dressing changes. This reduces patient discomfort and the burden of nursing care, as well as the risk of peri-drainage tube infection and deep incision infection.

[0035] In the embodiments of this disclosure, such as Figure 2 , Figure 6 As shown, a slit 104 is provided on one side of the adhesive dressing layer 100, and the slit 104 breaks off from the outer edge of the adhesive dressing layer 100 to the clearance hole 101. This creates an openable opening structure in the dressing layer at the clearance hole 101, making it easy to insert the dressing layer into the drainage tube that has been placed in the body from the side without having to pass the drainage tube through the clearance hole 101.

[0036] The suction box 200 is C-shaped, with its length surrounding the clearance hole 101, and its two ends close together to form a ring. This creates a basically continuous liquid collection path around the clearance hole 101, while the C-shaped opening corresponds to the position of the slit 104, providing clearance space for the lateral insertion of the drainage tube.

[0037] In practical use, the slit 104 allows the device to be installed even with the drainage tube already in place, without the need to remove or disconnect the tube, significantly reducing the difficulty of operation and the risk of trauma to the patient. The layout of the C-shaped suction box 200 surrounding the avoidance hole 101 ensures that the suction box 200 covers the entire area around the drainage tube outlet in the circumferential direction, ensuring that exudate from all directions can be effectively collected and avoiding collection dead zones. The ring-shaped structure formed by the two ends of the suction box 200 approaching each other ensures complete circumferential coverage while cooperating with the slit 104 to facilitate convenient installation and removal of the device.

[0038] Furthermore, the two ends of the suction box 200 are aligned with the slit 104, so that the C-shaped opening of the suction box 200 coincides with the slit 104 of the adhesive layer 100, forming a lateral opening channel that runs through the entire device. Simultaneously, the adhesive layer 100 has a portion extending towards the opposite side on one or both sides of the slit 104. When the adhesive layers on both sides of the slit 104 come together after installation, the excess portions overlap, ensuring that the adhesive layer 100 completely surrounds the drainage tube outlet without leakage. This compensates for the continuity interruption caused by the slit 104, prevents liquid from leaking to the outside from the slit 104, and ensures the sealing integrity of the adhesive layer 100 around the drainage tube.

[0039] In the embodiments of this disclosure, such as Figure 6 As shown, an absorbent cotton ring 105 is provided on the side of the adhesive dressing layer 100 adjacent to the clearance hole 101, surrounding the clearance hole 101. This absorbent cotton ring 105 is directly adjacent to the outlet of the drainage tube and is used to preferentially contact and absorb liquid seeping from around the drainage tube. On the side of the absorbent cotton ring 105 away from the clearance hole 101, an adhesive ring 106 is provided around the absorbent cotton ring 105 for adhesion and fixation to the skin. The suction hole 202 is positioned directly opposite the absorbent cotton ring 105, so that the negative pressure suction path acts directly on the area where the absorbent cotton ring 105 is located.

[0040] Furthermore, the absorbent cotton ring 105, surrounding the avoidance hole 101, ensures that the exudate is absorbed immediately upon emergence, minimizing the contact time between the exudate and the skin and effectively protecting the skin around the drainage tube outlet. The adhesive ring 106, located around the absorbent cotton ring 105, reliably secures the device while preventing direct contact between the adhesive material and the exudate area, thus maintaining its adhesive properties. The arrangement of the suction hole 202 directly opposite the absorbent cotton ring 105 minimizes the negative pressure suction path, ensuring that the liquid absorbed by the absorbent cotton ring 105 is efficiently drawn into the storage chamber 201, achieving timely removal of the exudate.

[0041] In the embodiments of this disclosure, such as Figure 3 As shown, the anti-backflow device 300 includes absorbent cotton 301 disposed within the liquid storage chamber 201. The absorbent cotton 301 fills the liquid storage chamber 201, utilizing its porous structure to generate capillary adsorption of the liquid. When liquid enters the liquid storage chamber 201 through the suction hole 202, the absorbent cotton 301 adsorbs and retains the liquid within its own pore structure through capillary force. When the liquid level in the liquid storage chamber 201 increases or a backflow tendency occurs due to changes in the device's position, the capillary holding force of the absorbent cotton 301 can fix the liquid inside the absorbent cotton 301, preventing the liquid from flowing back out through the suction hole 202. It should be noted that the small-diameter suction hole 202 itself also has a certain effect of hindering liquid flow; therefore, the suction hole 202, in conjunction with the absorbent cotton 301, can produce a good anti-backflow effect.

[0042] This design utilizes the capillary action of absorbent cotton 301 to prevent backflow. It features a simple structure, requires no moving parts, and offers high reliability. It eliminates the jamming or failure issues that can occur with mechanical check valves.

[0043] Furthermore, the absorbent cotton 301 is laid on the side of the liquid storage chamber 201 with the liquid absorption hole 202, and there is a gap between the absorbent cotton 301 and the side of the liquid storage chamber 201 opposite to the liquid absorption hole 202. The negative pressure interface 401 of the negative pressure device 400 can be set on the side of the liquid storage chamber 201 opposite to the liquid absorption hole 202.

[0044] The absorbent cotton 301 is laid on the side where the liquid suction hole 202 is located, enabling it to contact and absorb the liquid entering from the liquid suction hole 202 immediately, achieving rapid liquid interception and fixation. The gap between the absorbent cotton 301 and the top wall of the liquid storage chamber 201 provides space for temporary liquid buffering and gas flow, ensuring that the negative pressure in the liquid storage chamber 201 can be transmitted to the absorbent cotton 301 and the liquid suction hole 202 through this gap, maintaining the continuous effectiveness of negative pressure suction. At the same time, this gap prevents the absorbent cotton 301 from expanding and blocking the negative pressure channel, ensuring the normal operation of the negative pressure device 400.

[0045] In the embodiments of this disclosure, such as Figure 5 , Figure 3 As shown, each suction hole 202 is provided with a capillary tube 302 that connects to the suction hole 202. The capillary tube 302 extends towards the liquid storage chamber 201 opposite to the suction hole 202. When the negative pressure device 400 is activated, the negative pressure in the liquid storage chamber 201 is transmitted to the suction hole 202 through the capillary tube 302, forming a continuous liquid suction channel. The slender structure of the capillary tube 302 itself has a certain anti-backflow characteristic, and the liquid is not easily reversed by itself due to surface tension within the capillary tube 302. Therefore, this interface, in conjunction with the absorbent cotton 301, can achieve a better anti-backflow effect.

[0046] The inner diameter of the capillary tube 302 is 0.2mm-1mm, preferably 0.5mm, and the length of the capillary tube 302 is longer than the thickness of the absorbent cotton 301.

[0047] Of course, as shown in Figure 5, the capillary tube 302 may not be provided on the suction hole 202.

[0048] In some implementations, the negative pressure device 400 can be a conventional electrically controlled negative pressure source, such as a low-flow suction pump.

[0049] In the embodiments of this disclosure, such as Figure 1As shown, the negative pressure device 400 includes a connecting pipe 402 mounted on the liquid suction box 200. One end of the connecting pipe 402 is connected to the liquid storage chamber 201, and the other end is equipped with a bulb 403 for unidirectional air extraction away from the liquid storage chamber 201. The bulb 403 expands elastically, and one-way valves are provided at both ends to allow airflow to flow away from the liquid storage chamber 201. When the bulb 403 is manually squeezed, the gas inside the bulb 403 is discharged through the one-way valves; after the bulb 403 is released, the bulb 403 elastically recovers and generates negative pressure, drawing gas from the liquid storage chamber 201 through the connecting pipe 402.

[0050] The manual balloon-type negative pressure device 403 requires no external power supply or central negative pressure source. Its simple structure, low cost, and portability make it suitable for use in various settings such as wards and homes. The elastic balloon 403, combined with a one-way valve, allows the operator to establish and maintain a negative pressure environment within the reservoir 201 through simple manual compression. The device allows for flexible control of the frequency and intensity of negative pressure application based on the amount of exudate, providing convenience for clinical use.

[0051] Generally, the suction hole 202 has a small diameter, so a single squeeze can maintain the negative pressure in the storage chamber 201 for a relatively long time. It can also be squeezed as needed, or squeezed periodically, to actively clear the exudate.

[0052] In the embodiments of this disclosure, such as Figure 4 , Figure 5 As shown, the liquid suction box 200 is provided with an openable and closable drain port 500. Further, the drain port 500 includes a drain hole 501, and a drain pipe 502 is provided at the drain hole 501. A removable plug 503 is provided at one end of the drain pipe 502 away from the liquid storage chamber 201. In the closed state (plug 503 blocks the drain pipe 502), the liquid storage chamber 201 is maintained in a sealed and negative pressure state. In the open state (plug 503 does not block the drain pipe 502), the liquid collected in the liquid storage chamber 201 is allowed to drain.

[0053] The drainage port 500 allows exudate collected in the storage chamber 201 to be drained without disassembling the entire device, extending the device's single-use cycle. The coordinated design of the drainage pipe 502 and the removable plug 503 ensures the sealing of the storage chamber 201 during daily use while providing a convenient interface for drainage operations. This design reduces the frequency of device replacement, lowering medical consumable costs and reducing nursing workload.

[0054] In some embodiments, the adhesive dressing 100 can be removed from the suction box 200 for replacement, thereby enabling proactive replacement of the adhesive dressing 100 to extend the service life of the drainage tube exudate collection and skin protection device and reduce nursing costs.

[0055] In some embodiments, the negative pressure device 400 is also detachable and can be reused.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for collecting exudate around a drainage tube and protecting the skin, characterized in that, include: An adhesive dressing layer, wherein the adhesive dressing layer is an absorbent adhesive dressing layer, the adhesive dressing layer is provided with clearance holes, and one side of the adhesive dressing layer is an adhesive surface; A liquid absorption box is disposed on the adhesive dressing layer, and one side of the liquid absorption box is attached to the side of the adhesive dressing layer opposite to the adhesive surface. The liquid absorption box has a liquid storage cavity inside, and a liquid absorption hole is provided on the side of the liquid absorption box that is attached to the adhesive dressing layer. The liquid absorption hole extends from the liquid storage cavity to the adhesive dressing layer. An anti-backflow device is provided on the liquid absorption box to prevent liquid in the liquid storage chamber from flowing to the adhesive layer; A negative pressure device is provided on the liquid suction box to apply negative pressure to the liquid storage chamber; The adhesive layer absorbs liquid, and the negative pressure device applies negative pressure to the liquid storage chamber to draw the liquid absorbed by the adhesive layer into the liquid storage chamber through the liquid absorption hole, and the anti-backflow device prevents the liquid in the liquid storage chamber from flowing back to the adhesive layer.

2. The drainage tube periapical exudate collection and skin protection device according to claim 1, characterized in that, The adhesive layer is provided with a slit, which breaks off from the outer edge of the adhesive layer to the clearance hole; The suction box is C-shaped, surrounds the clearance hole, and the two ends of the suction box are brought together to form a ring.

3. The drainage tube periapical exudate collection and skin protection device according to claim 2, characterized in that, The two ends of the suction box are aligned with the cut, and the adhesive layer has an allowance extending to the opposite side on one or both sides of the cut.

4. The drainage tube periapical exudate collection and skin protection device according to any one of claims 1-3, characterized in that, The adhesive layer has an absorbent cotton ring surrounding the clearance hole on the side adjacent to the clearance hole, and an adhesive ring surrounding the absorbent cotton ring on the side away from the clearance hole, with the liquid absorption hole facing the absorbent cotton ring.

5. The drainage tube periapical exudate collection and skin protection device according to claim 1, characterized in that, The anti-backflow device includes absorbent cotton disposed inside the liquid storage chamber.

6. The drainage tube periapical exudate collection and skin protection device according to claim 5, characterized in that, The absorbent cotton is laid on the side of the liquid storage cavity with the liquid absorption hole, and there is a gap between the absorbent cotton and the side of the liquid storage cavity opposite to the liquid absorption hole.

7. The drainage tube periapical exudate collection and skin protection device according to claim 1 or 5, characterized in that, Each of the suction holes is provided with a capillary tube that connects to the suction hole, and the capillary tube extends toward the side of the liquid storage cavity opposite to the suction hole.

8. The drainage tube periapical exudate collection and skin protection device according to claim 7, characterized in that, The inner diameter of the capillary is 0.2mm-1mm.

9. The drainage tube periapical exudate collection and skin protection device according to claim 1, characterized in that, The negative pressure device includes a connecting pipe on the liquid suction box, one end of which is connected to the liquid storage chamber, and the other end is provided with a balloon for unidirectionally drawing air away from the liquid storage chamber.

10. The drainage tube periapical exudate collection and skin protection device according to claim 1, characterized in that, The liquid suction box is equipped with a drain port that can be opened and closed.

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