Cross pressure strong adsorption anti-leakage patch

Abstract

The utility model discloses a cross pressure strong adsorption anti -leakage plaster relates to medical plaster technical field, including cross -shaped elastic viscidity bandage, cross -shaped elastic viscidity bandage designs into X type cross -elasticity belt, and four long arms are used for plastering on the skin of patient, hydrogel covering layer is fixedly connected in the lower surface of cross -shaped elastic viscidity bandage to the upper surface of hydrogel covering layer, the utility model discloses a cross pressure strong adsorption anti -leakage plaster among water gel covering layer and grid layer realize the absorption treatment of pipe periphery leakage, wherein the water absorption of water gel covering layer is more than 800%, can absorb the wound exudate efficiently, keeps dry and clean, can also lock up moisture, avoids the effusion backflow to the skin puncture part, reduces the infection risk, and its inside contains nanometer silver particle, and the concentration is 0.1 0.3wt%, can realize the antibacterial function, the vertical directional fiber in the grid layer interior can guide the flow channel, and the horizontal interlaced fiber can form the intercepting net.

Description

Technical Field

[0001] This utility model relates to the field of medical dressing technology, specifically to a cross-shaped pressure-adhesive anti-leakage dressing. Background Technology

[0002] Serous cavity effusion is a common complication of diseases such as tumors and inflammation. Therefore, the clinical application of tube drainage is common, such as abdominal tube drainage, chest tube drainage, and biliary tube drainage. Such treatments often require subcutaneous puncture to insert a drainage tube in order to drain the internal effusion.

[0003] After drainage replacement, the puncture site may experience leakage of fluid around the drainage tube due to the release of internal pressure. The hours and days following tube removal are peak periods for leakage at the puncture site, especially for elderly individuals with loose, inelastic skin who heal more slowly. This makes them more prone to leakage around the drainage tube after insertion and leakage at the puncture site after removal. Ordinary medical dressings have limited absorbency and lack pressure-based leak-proof functions, requiring frequent dressing changes by physicians. Furthermore, once the dressing becomes soaked, it increases the risk of bacterial invasion and wound infection. Therefore, this practical design utilizes a cross-shaped pressure-adhesive leak-proof dressing to address these issues. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is: a cross-shaped pressure-adhesive anti-leakage dressing, including...

[0005] A cross-shaped elastic adhesive bandage, designed as an X-shaped intersecting elastic bandage, is applied to the patient's skin; through a three-dimensional pressure subsystem design, its elastic modulus is 0.5-1.2 MPa.

[0006] A hydrogel covering layer, the upper surface of which is fixedly connected to the lower surface of a cross-shaped elastic adhesive bandage, wherein the thickness of the middle part of the bottom layer is greater than the thickness of the periphery; wherein the water absorption rate of the hydrogel covering layer is >800%.

[0007] A mesh layer, the upper surface of which is connected to the lower surface of the hydrogel overlay, and the lower surface of the mesh layer is used to contact the wound;

[0008] A micro silicone suction cup, wherein the micro silicone suction cup surrounds a hydrogel covering layer, and the inner wall of the micro silicone suction cup has a thermally responsive gel that can expand upon heating.

[0009] The inner cavity is located at the edge of the inner wall of the micro silicone suction cup, and the interior of the inner cavity is lined with non-woven fabric that can detect the pH concentration of the accumulated liquid.

[0010] Furthermore, the outer layer of the cross-shaped elastic adhesive bandage is made of TPU-based elastic film material and features a four-point anchoring design. It has a thickness of 50-80 μm and a moisture permeability ≥3000 g / m². 2 The bandage is applied for 24 hours. It uses a medical-grade spandex and cotton blend in an 80:20 ratio. As the outer layer, a medical-grade TPU-based elastic film with an X-shaped cross-elastic band design integrates a medical-grade spandex (80%) and cotton (20%) blend to achieve flexible fixation and dynamic pressure adjustment.

[0011] Furthermore, the hydrogel covering layer is an intermediate layer made of modified PVA hydrogel material. The hydrogel covering layer is thicker in the middle and thinner around the edges. Nano-silver particles are added inside the hydrogel covering layer at a concentration of 0.1-0.3wt% to achieve antibacterial function.

[0012] Furthermore, the mesh layer is an inner layer made of silk fibroin-modified cotton mesh material, with its bottom designed to contact the wound. The mesh layer is manufactured using electrospinning equipment, with internal fiber diameters of 10-20 μm, while the pore size of the silk fibroin-modified cotton mesh is 0.5-1 mm, and the contact angle is ≤30°. Vertically oriented fibers construct rapid flow channels, while horizontally interwoven fibers form an interception mesh, efficiently guiding and intercepting exudate.

[0013] Furthermore, the upper surface of the micro silicone suction cup is fixedly connected to the lower surface of the cross-shaped elastic adhesive bandage, and the distance between the micro silicone suction cup and the human skin is greater than the distance between the mesh layer and the human skin. The micro silicone suction cup contains a thermoresponsive gel with a phase change temperature of 32°C. Upon contact with the skin, the thermoresponsive gel expands due to body temperature, forming a gradient negative pressure adsorption that compensates for gaps in skin folds.

[0014] Furthermore, multiple cavities are provided. The non-woven fabric can be freely inserted into the inner wall of the micro-silicone suction cup, and its pH concentration can be detected for any accumulated liquid that may have seeped to the edge of the mesh layer, thus assisting the hydrogel covering layer in absorbing the liquid. Because the non-woven fabric has been modified, pH-sensitive materials, such as acid-base indicators, are added to its surface. These indicators change color when exposed to different pH levels, allowing the non-woven fabric to be used like test strips. Therefore, when the non-woven fabric comes into contact with accumulated liquid, the indicator color changes according to the pH, and the result can be read by colorimetry, i.e., comparison with a standard color chart. This method is low-cost, simple to operate, and practical. In wound care, it can be used to measure the pH value of wound exudate, helping to determine the infection or healing status.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model achieves the absorption and treatment of percutaneous leakage through the hydrogel covering layer and the mesh layer in the cross-shaped pressure strong adsorption leak-proof dressing. The water absorption rate of the hydrogel covering layer is >800%, which can efficiently absorb wound exudate, keep the wound dry and clean, and lock in moisture to prevent the accumulated fluid from flowing back to the skin puncture site, reducing the risk of infection. At the same time, it contains nano-silver particles with a concentration of 0.1-0.3wt%, which can achieve antibacterial function. The vertically oriented fibers inside the mesh layer can guide the flow channels, and the horizontally interwoven fibers can form an interception net, which can efficiently guide and intercept exudate.

[0017] 2. The dressing in this invention is suitable for drainage tube wounds on various parts of the body. The X-shaped cross elastic band and four-point anchoring design adapt to different curved surfaces, such as the abdomen and chest, providing uniform pressure. The non-woven fabric in the inner cavity can directly detect the pH value of the accumulated fluid, detect the risk of infection in advance, intervene in time, and reduce the incidence of infection. The micro silicone suction cup contains heat-responsive gel, which expands to form negative pressure triggered by body temperature. It is convenient for the elderly, can compensate for the folds and gaps in the skin of the elderly, reduce edge seepage, and further enhance the fit of the dressing.

[0018] 3. The cross-shaped pressure-adhesive anti-leakage dressing of this utility model breaks through the technical bottleneck of traditional flat dressings that cannot achieve radial pressure around the tube, and solves the material contradiction between high exudate volume and skin protection. On this basis, an exudate gradient management mechanism is further established to avoid maceration and contamination of the wound. Its exudate control capability is shown in the simulation experiment to be an exudate capture rate of 98.7% after 72 hours, which is much higher than the 62.4% of the control group. At the same time, the dressing change interval is extended to 72-96 hours, and the incidence of skin maceration is reduced by 82%. Attached Figure Description

[0019] Figure 1 This is the front view of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the cross-shaped elastic adhesive bandage of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the hydrogel coating layer of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the grid layer of this utility model;

[0023] Figure 5 This is a schematic diagram of the seepage diversion channel of this utility model.

[0024] In the image: 1. Cross-shaped elastic adhesive bandage; 2. Hydrogel overlay; 3. Mesh layer; 4. Micro silicone suction cup; 41. Thermally responsive gel; 5. Inner cavity; 51. Non-woven fabric. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0026] Example 1:

[0027] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a cross-shaped pressure-adhesive anti-leakage dressing, comprising;

[0028] The cross-shaped elastic adhesive bandage 1 is designed as an X-shaped cross elastic band with four long arms for application to the patient's skin; through the design of a three-dimensional pressure subsystem, its elastic modulus is 0.5-1.2MPa.

[0029] The upper surface of the hydrogel covering layer 2 is fixedly connected to the lower surface of the cross-shaped elastic adhesive bandage 1, and the thickness of the middle part of the bottom layer is greater than the thickness of the periphery; wherein, the water absorption rate of the hydrogel covering layer 2 is >800%.

[0030] Mesh layer 3, the upper surface of mesh layer 3 is connected to the lower surface of hydrogel covering layer 2 and the lower surface of mesh layer 3 is used to contact the wound;

[0031] A micro silicone suction cup 4 surrounds the hydrogel covering layer 2, and the inner wall of the micro silicone suction cup 4 has a thermally responsive gel 41 that can expand upon heating.

[0032] The inner cavity 5 is located at the edge of the inner wall of the micro silicone suction cup 4, and the interior of the inner cavity 5 is provided with non-woven fabric 51 that can detect the pH concentration of the accumulated liquid.

[0033] The outer layer of the cross-shaped elastic adhesive bandage (1) is made of TPU-based elastic film material and features a four-point anchoring design. It has a thickness of 50-80µm and a moisture permeability of ≥3000g / m². 2The cross-shaped elastic adhesive bandage 1, used for 24 hours, is made of medical-grade spandex and cotton blend material in an 80:20 ratio. As the outer layer, it features a medical-grade TPU-based elastic film with an X-shaped cross-elastic band design, internally integrating a medical-grade spandex (80%) and cotton (20%) blend material to achieve flexible fixation and dynamic pressure adjustment. The four-point anchoring design ensures stable adhesion to the skin, with an elastic modulus of 0.5-1.2 MPa, providing an effective pressure of 8-12 mmHg around the drainage tube, meeting the standards of the International Wound Healing Association. It provides precise radial pressure to the wound area, covers the area around the drainage tube, prevents dressing displacement, accommodates patient movement, and maintains appropriate pressure to promote healing.

[0034] The hydrogel covering layer 2 is the middle layer, made of modified PVA hydrogel material, thicker in the center and thinner around the edges. Nano-silver particles are added to the interior of the hydrogel covering layer 2 at a concentration of 0.1-0.3 wt% to achieve antibacterial function. The middle layer, also made of modified PVA hydrogel material, features a design that is thicker in the center and thinner around the edges. The thickened central area is aligned with the puncture site, enhancing protection of the core area. It can quickly absorb exudate around the drainage tube and at the skin puncture site to a certain extent, locking in moisture to prevent backflow. The nano-silver particles provide antibacterial protection, reducing the risk of bacterial contamination.

[0035] The inner layer, mesh layer 3, is made of silk fibroin-modified cotton mesh material, with its bottom designed to contact the wound. Mesh layer 3 is manufactured using electrospinning equipment, resulting in internal fiber diameters of 10-20 μm, while the pore size of the silk fibroin-modified cotton mesh is 0.5-1 mm, with a contact angle ≤30°. Vertically oriented fibers create rapid drainage channels, while horizontally interwoven fibers form an interception mesh, efficiently guiding and intercepting exudate. The bottom contacts the wound, and the low contact angle ensures good moisture retention, promoting healing.

[0036] The upper surface of the micro silicone suction cup 4 is fixedly connected to the lower surface of the cross-shaped elastic adhesive bandage 1, and the distance between the micro silicone suction cup 4 and the human skin is greater than the distance between the mesh layer 3 and the human skin, that is, it will not come into contact with the human skin. The micro silicone suction cup 4 contains a thermally responsive gel 41 with a phase change temperature of 32°C. After the thermally responsive gel 41 comes into contact with the skin, it expands due to the body temperature, forming a gradient negative pressure adsorption, compensating for the gaps in skin folds, enhancing the fit, and reducing edge seepage, which is especially suitable for the elderly.

[0037] Multiple cavities 5 are provided, among which non-woven fabric 51 can be freely inserted into the inner wall of the micro silicone suction cup 4. The non-woven fabric 51 is used to detect the pH concentration of any accumulated fluid that may penetrate to the edge of the mesh layer 3, thus assisting the hydrogel covering layer 2 and the mesh layer 3 in absorbing the fluid. Because the non-woven fabric 51 has been modified, pH-sensitive materials, such as acid-base indicators, are added to its surface. These indicators change color when exposed to different pH levels, allowing the non-woven fabric 51 to be used like test strips. Therefore, when the non-woven fabric 51 comes into contact with accumulated fluid, the indicator color changes according to the pH. The result can then be read by colorimetry, i.e., comparison with a standard color chart. This method is low-cost, simple to operate, and practical. In wound care, it can be used to measure the pH value of wound exudate, helping to determine the infection or healing status. When there is normal exudate, the nonwoven fabric 51 turns light blue at pH 6-7. When there is infectious exudate with pH > 7.5, it turns orange-red. This can detect the pH concentration of the fluid at the edge, provide early warning of infection risk, and allow medical staff to promptly detect abnormalities and take measures based on the color change.

[0038] Working principle:

[0039] First, the cross-shaped elastic adhesive bandage 1 possesses a certain degree of elasticity and adhesiveness. Its four long arms can directly adhere to the patient's skin surface, and the hydrogel covering layer 2 and mesh layer 3 at the bottom work together to absorb leakage around the drainage tube. The center of the hydrogel covering layer 2 and mesh layer 3 covers the upper surface of the puncture site. The cross-shaped elastic adhesive bandage 1, through the design of a three-dimensional pressure subsystem, uses X-shaped cross elastic bands and four-point anchoring technology to provide stable pressure. The elastic modulus can reach 0.5-1.2MPa, which can cover the area around the tube well and achieve precise radial pressure on the wound area. In addition, the cross-shaped elastic adhesive bandage 1 also uses four-point anchoring technology and integrates medical spandex and cotton blend materials inside to achieve flexible fixation and dynamic pressure adjustment. Interface pressure test shows that the effective pressure around the tube is 8-12mmHg, which meets the recommended standards of the International Wound Healing Association.

[0040] The hydrogel covering layer 2 is located at the center of the upper surface of the mesh layer 3. It has a strong water absorption function. The center is thickened and the periphery is relatively thin, and the water absorption rate can reach more than 800%. Nano silver particles are also added inside, with a concentration of 0.1-0.3wt%, which realizes the antibacterial function and can avoid bacterial contamination caused by the seepage of accumulated liquid.

[0041] The innermost layer, the mesh layer 3, is made using electrospinning equipment. The inside is a cotton mesh modified with silk fibroin. Vertically oriented fibers can build a fast flow channel, and horizontally interwoven fibers can form a small-aperture interception mesh, so that the contact angle at the bottom is ≤30°.

[0042] A layer of miniature silicone suction cups 4 surrounds the mesh layer 3. These tiny suction cups 4 are very lightweight and fixed to the lower surface of the cross-shaped elastic adhesive bandage 1, without causing significant pressure on the skin. The inner cavity 5 on its inner surface is lined with a non-woven fabric 51 containing a pH-sensitive dye. Normal exudate has a pH of 6-7 and appears pale blue, while infectious exudate with a pH > 7.5 turns orange-red. When fluid accumulates at the edge of the overall leak-proof dressing, the non-woven fabric 51 turns orange-red upon contact with the fluid, alerting to the risk of infection and facilitating rapid observation by medical personnel. The non-woven fabric 51 is also very lightweight, making it easy to remove from inside the inner cavity 5, facilitating both installation and removal.

[0043] Finally, the micro silicone suction cup 4 is equipped with a thermally responsive gel 41 with a phase change temperature of 32°C. When it comes into contact with human skin, it expands due to body temperature and forms a gradient negative pressure adsorption, which can dynamically compensate for the gaps caused by skin folds. This is especially convenient for the elderly and can reduce edge exudation to a certain extent. Therefore, it is placed around the hydrogel covering layer 2 and can be used to assist in the adhesion of the wound around the elderly on the basis of the cross-shaped elastic adhesive bandage 1, so that the central mesh layer 3 can better adhere to the patient's skin surface and reduce the risk of the elderly falling off due to skin folds.

[0044] Because the cross-shaped elastic adhesive bandage 1 itself has a certain elasticity and adhesive pressure, and the heat-responsive gel 41 in the micro silicone suction cup 4 does generate a certain pressure after being heated and expanded, this pressure is extremely small and will not increase the pressure on the basis of the pressure of the cross-shaped elastic adhesive bandage 1. The pressure effect on the surface of human skin is negligible. Its core function is only to fill the micro gaps in the skin, rather than increase the overall pressure. This small pressure mainly compensates for the small gaps between the patch and the skin caused by the skin folds of the elderly, so that the entire patch fits better on the human skin. On this basis, it further reduces the possibility of edge leakage, making it more effective for the elderly. At the same time, the leakage control ability of this cross-shaped pressure strong adsorption anti-leakage patch showed a leakage capture rate of 98.7% after 72 hours in the simulation experiment, while the control group was 62.4%.

[0045] Its interface pressure test showed that the effective pressure around the tube was 8-12 mmHg, which meets the recommended standards of the International Wound Healing Association;

[0046] In terms of clinical advantages, the dressing change interval is extended to 72-96 hours, while traditional dressings need to be changed daily. At the same time, the incidence of skin maceration of this dressing is reduced by 82%, which can avoid contamination of the wound by maceration.

[0047] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, are implemented according to conventional means in the art.

Claims

1. A cross-shaped pressure-adhesive, leak-proof dressing, characterized in that: include A cross-shaped elastic adhesive bandage (1), the cross-shaped elastic adhesive bandage (1) is designed as an X-shaped cross elastic band with four long arms for application to the patient's skin; A hydrogel covering layer (2) is fixedly connected to the lower surface of a cross-shaped elastic adhesive bandage (1) on its upper surface, and the thickness of the middle part of the bottom layer is greater than the thickness of the periphery. A mesh layer (3) has its upper surface connected to the lower surface of a hydrogel covering layer (2), and the lower surface of the mesh layer (3) is used to contact the wound. A micro silicone suction cup (4) surrounds the hydrogel covering layer (2), and the inner wall of the micro silicone suction cup (4) has a thermally responsive gel (41) that can expand upon heating. The inner cavity (5) is located at the edge of the inner wall of the micro silicone suction cup (4), and the interior of the inner cavity (5) is provided with non-woven fabric (51) that can detect the pH concentration of the accumulated liquid.

2. The cross-shaped pressure-adhesive anti-leakage dressing according to claim 1, characterized in that: The cross-shaped elastic adhesive bandage (1) is the outer layer, made of TPU-based elastic film material, and uses a four-point anchoring design.

3. The cross-shaped pressure-adhesive anti-leakage dressing according to claim 1, characterized in that: The hydrogel covering layer (2) is an intermediate layer, made of modified PVA hydrogel material, with the middle layer being thicker than the surrounding area.

4. The cross-shaped pressure-adhesive anti-leakage dressing according to claim 1, characterized in that: The mesh layer (3) is the inner layer, made of silk fibroin modified cotton mesh material, and its bottom is used to contact the wound.

5. The cross-shaped pressure-adhesive anti-leakage dressing according to claim 1, characterized in that: The upper surface of the micro silicone suction cup (4) is fixedly connected to the lower surface of the cross-shaped elastic adhesive bandage (1), and the distance between the micro silicone suction cup (4) and the human skin is greater than the distance between the mesh layer (3) and the human skin.

6. The cross-shaped pressure-adhesive anti-leakage dressing according to claim 1, characterized in that: The number of cavities (5) is multiple.

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