Dressing for burns and scalds

Abstract

The utility model provides a dressing for burns and scalds. The burn and scald dressing comprises: an easy-to-tear layer; the anti-adhesion layer is arranged on the easy-to-tear layer; the phase change layer is bonded with the anti-adhesion layer; the back lining layer is arranged on the phase change layer; the phase change layer is made of phase change temperature adjusting alginate fibers. The burn and scald dressing disclosed by the utility model can achieve the compound effects of easing pain, preventing adhesion and preventing infection on the wounded part of the burn and scald.

Description

Technical Field

[0001] The utility model relates to the technical field of medical dressings, in particular to a burn dressing. Background Art

[0002] Burns and scalds are common accidental injuries. The skin tissue of the injured is severely damaged, accompanied by intense pain, blisters, exudation, etc. Generally, it is defined that the wound surface is rinsed with cold tap water for 20 minutes within 3 hours of thermal burns as sufficient cooling, and this is taken as the primary measure for on-site first aid treatment of thermal burn wounds. However, in emergency situations, there may be no access to a clean and continuous water supply, or the water temperature cannot be accurately and timely adjusted, and the long-term contact of the water flow will cause certain damage to the wound surface. In addition, during the treatment process, the burn dressing should not only cover the wound and prevent bacterial infection, but also have the functions of analgesia and anti-adhesion to relieve the pain of dressing change. Traditional burn dressings such as silver ion dressings and hydrocolloid dressings often have a single function and are difficult to meet these composite requirements simultaneously. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a burn dressing that can achieve the composite effects of analgesia, anti-adhesion and anti-infection on the burn and scald affected area.

[0004] To solve the above technical problems, the technical solution of the utility model is as follows:

[0005] An embodiment of the utility model provides a burn dressing, including:

[0006] An easily torn layer;

[0007] An anti-adhesion layer disposed on the easily torn layer;

[0008] A phase change layer adhered to the anti-adhesion layer; and

[0009] A backing layer disposed on the phase change layer; the phase change layer is a phase change temperature-regulating seaweed fiber.

[0010] Optionally, the size of the backing layer is larger than the sizes of the phase change layer and the anti-adhesion layer, and the size of the easily torn layer is equal to the size of the backing layer.

[0011] Optionally, the backing layer is a polyurethane film coated with a medical pressure-sensitive adhesive.

[0012] Optionally, the phase change temperature-regulating seaweed fiber of the phase change layer contains phase change microcapsules.

[0013] Optionally, the core material of the phase change microcapsules is paraffin wax, and the wall material is a polymer material.

[0014] Optionally, the phase change temperature of the phase change layer is 15 to 37 °C.

[0015] Optionally, the anti-adhesion layer is a chitosan non-woven fabric loaded with curcumin on the surface.

[0016] Optionally, the easy-to-tear layer is a release paper material.

[0017] Optionally, the anti-adhesion layer and the phase change layer are bonded by a medical pressure-sensitive adhesive.

[0018] Optionally, the medical pressure-sensitive adhesive is used to bond the anti-adhesion layer and the phase change layer in a dot coating manner.

[0019] The above solution of the present utility model has at least the following beneficial effects:

[0020] The burn dressing according to the above solution of the present utility model includes: an easy-to-tear layer; an anti-adhesion layer provided on the easy-to-tear layer; a phase change layer bonded to the anti-adhesion layer; and a backing layer provided on the phase change layer; the phase change layer is a phase change temperature-regulating seaweed fiber. It can achieve a composite effect of relieving pain, preventing adhesion and preventing infection on the burn and scald affected area. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the layers of the burn dressing provided by the embodiment of the present utility model;

[0022] Description of the Reference Numerals:

[0023] 1. Backing layer; 2. Phase change layer; 3. Anti-adhesion layer; 4. Easy-to-tear layer. Detailed Embodiments

[0024] The exemplary embodiments of the present utility model will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0025] As Figure 1 shown, the embodiment of the present utility model provides a burn dressing, including:

[0026] An easy-to-tear layer 4;

[0027] An anti-adhesion layer 3 provided on the easy-to-tear layer 4;

[0028] A phase change layer 2 bonded to the anti-adhesion layer 3; and

[0029] A backing layer 1 provided on the phase change layer 2; the phase change layer 2 is a phase change temperature-regulating seaweed fiber.

[0030] In this embodiment, the burn dressing adopts a layered structure. The easy-to-tear layer 4 is torn off during use, and the anti-adhesion layer 3 is brought into contact with the skin. The anti-adhesion layer 3 plays a role in preventing the dressing from adhering to the wound skin and has an anti-inflammatory effect. The phase change temperature-regulating seaweed fiber of the phase change layer 2 plays a role in exchanging heat in the wound and relieving pain. The backing layer 1 can fix the anti-adhesion layer 3 and the phase change layer 2 to the wound. At the same time, the backing layer 1 is transparent, and the liquid absorption situation of the phase change layer 2 can be observed.

[0031] Through the above multi-layer settings, various requirements such as pain relief, anti-inflammatory, and anti-adhesion during burn can be met. At the same time, the structure is simple and the use is convenient.

[0032] In an alternative embodiment of the present utility model, the size of the backing layer 1 is larger than the sizes of the phase change layer 2 and the anti-adhesion layer 3, and the size of the easy-to-tear layer 4 is equal to the size of the backing layer 1.

[0033] In this embodiment, the size of the backing layer 1 is larger than the phase change layer 2 and the anti-adhesion layer 3. During the use of the dressing, the phase change layer 2 and the anti-adhesion layer 3 can be effectively wrapped, so that the phase change layer 2 and the anti-adhesion layer 3 are tightly fixed to the wound. The size of the easy-to-tear layer 4 is equal to the size of the backing layer 1, preventing contamination when the dressing is not in use.

[0034] In an alternative embodiment of the present utility model, the backing layer 1 is a polyurethane film coated with a medical pressure-sensitive adhesive.

[0035] In this embodiment, the thickness of the polyurethane film coated with the medical pressure-sensitive adhesive of the backing layer 1 is 0.04 - 0.08 mm, and the size is larger than the phase change layer 2 and the anti-adhesion layer 3. Therefore, the dressing can be fixed to the wound site. At the same time, the polyurethane film has the functions of being transparent, waterproof, breathable, and bacteria-proof, which is convenient for observing the liquid absorption situation of the phase change layer 2 and guiding the dressing change. In the present utility model, no specific requirements are made for the specific size of the dressing, and it can be adapted to wounds of various shapes according to actual needs, and the application scenario is more extensive.

[0036] In an alternative embodiment of the present utility model, the phase change temperature-regulating seaweed fiber of the phase change layer 2 contains phase change microcapsules; the core material of the phase change microcapsules is paraffin, and the wall material is a polymer material.

[0037] In this embodiment, phase change microcapsules are added as a temperature-regulating additive to the alginate solution to prepare a spinning mixture, and phase change temperature-regulating seaweed fibers are prepared by a conventional wet spinning process. The process is mature and easy to scale up. Among them, the phase change microcapsules are made of a phase change material, paraffin wax, as the core material and a polymer material such as chitosan and gelatin as the wall material through an emulsification cross-linking method. Among them, paraffin wax has the advantages of small volume change and non-toxicity; gelatin, chitosan, etc. as wall materials have good biocompatibility, avoiding potential safety risks when used as dressings. When the phase change layer 2 comes into contact with a burn wound, the phase change microcapsules can exchange heat from the environment in the form of latent heat by undergoing a phase change, keeping the temperature constant within 15-37°C, so as to achieve the purpose of cooling and not easily causing damage. Seaweed fibers contain a large amount of hydroxyl groups, so they can absorb wound exudate, preventing the inflammatory exudate from soaking the wound and bacterial infection.

[0038] In an alternative embodiment of the present utility model, the anti-adhesion layer 3 is a chitosan non-woven fabric with curcumin loaded on the surface.

[0039] In this embodiment, the anti-adhesion layer 3 is made by impregnating a chitosan non-woven fabric in a curcumin-ethanol solution and then drying it. Compared with low-molecular-weight polyphenolic compounds, curcumin has a wide range of pharmacological activities such as anti-inflammatory, antioxidant, lipid-regulating, antiviral, anti-infective, anti-tumor, anticoagulant, anti-liver fibrosis, and anti-atherosclerosis, and has low toxicity and few adverse reactions. Curcumin can have an anti-inflammatory and analgesic effect by regulating the inflammatory response. At the same time, the chitosan of the anti-adhesion layer 3 significantly inhibits the growth of fibroblasts, thus preventing the formation of wound adhesions. In addition, chitosan also has a certain analgesic effect, inhibiting the activity enzymes of pro-inflammatory factors produced in the blood after trauma and the production levels of pain-causing inflammatory factors - bradykinin and 5'-hydroxytryptamine, and can also reduce the pain of the injured.

[0040] In an alternative embodiment of the present utility model, the easy-to-tear layer 4 is a release paper material.

[0041] In this embodiment, when using the burn dressing, after opening the outer package and taking out the dressing, directly remove the easy-to-tear layer 4, then cover the dressing on the wound surface, and fix the dressing through the pressure-sensitive adhesion of the pressure-sensitive adhesive. Whether to replace the dressing can be determined by observing the change in the appearance of the phase change layer 2 after absorbing exudate.

[0042] In an alternative embodiment of the present utility model, the anti-adhesion layer 3 and the phase change layer 2 are bonded by a medical pressure-sensitive adhesive. The medical pressure-sensitive adhesive bonds the anti-adhesion layer 3 and the phase change layer 2 by means of dot gluing.

[0043] In this embodiment, a medical acrylate pressure-sensitive adhesive or a medical polyurethane pressure-sensitive adhesive is used between the anti-adhesion layer 3 and the phase change layer 2, and they are bonded together by means of transfer coating and dot coating, which is convenient for large-scale production.

[0044] The above-mentioned embodiment of the present utility model has the following beneficial effects:

[0045] 1. When burns occur, the skin temperature rises, and patients usually suffer from severe burning pain. When the phase change layer is used, the phase change microcapsules in it can exchange heat with the wound microenvironment through the transformation of polymer branches and the change of crystal form at a specific temperature, reducing the sensitivity of nerve endings, so as to achieve the purpose of cooling and relieving pain, terminating the continuous damage of the remaining heat of the wound surface to the viable tissues, and thus inhibiting the deepening of the wound surface damage. The dressing is easy to use, avoiding the delay of treatment due to the lack of water source. The seaweed fiber of the phase change layer can absorb the wound exudate, preventing the inflammatory impregnation and bacterial infection of the wound by the exudate.

[0046] 2. Curcumin in the anti-adhesion layer can play its anti-inflammatory and analgesic effects by down-regulating the NLRP3 inflammasome. Chitosan significantly inhibits the growth of fibroblasts, thus preventing the formation of wound adhesions. In addition, chitosan also has a certain analgesic effect, inhibiting the activity enzymes of pro-inflammatory factors produced in the blood after trauma and the production levels of inflammatory factors causing pain - bradykinin and 5'-hydroxytryptamine, and can also relieve the pain of the injured.

[0047] 3. When in use, the backing layer can paste and fix the dressing to the skin surface through the pressure-sensitive adhesion of the pressure-sensitive adhesive, playing a role in waterproofing, breathable and bacteria-proofing, and at the same time being able to observe the situation of the phase change layer absorbing exudate to guide the dressing change.

[0048] The above is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle described in the present utility model, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model.

Claims

1. A burn dressing, characterized in that, Including: A tearable layer (4); An anti-adhesion layer (3) disposed on the tearable layer (4); A phase change layer (2) adhered to the anti-adhesion layer (3); and A backing layer (1) disposed on the phase change layer (2); the phase change layer (2) is a phase change temperature-regulating seaweed fiber.

2. The burn dressing according to claim 1, characterized in that, The size of the backing layer (1) is larger than the sizes of the phase change layer (2) and the anti-adhesion layer (3), and the size of the tearable layer (4) is equal to the size of the backing layer (1).

3. The burn dressing according to claim 1, wherein The backing layer (1) is a polyurethane film coated with a medical pressure-sensitive adhesive.

4. The burn dressing according to claim 1, characterized in that, The phase change temperature-regulating seaweed fiber of the phase change layer (2) contains phase change microcapsules.

5. The burn dressing according to claim 4, wherein The core material of the phase change microcapsules is paraffin, and the wall material is a polymer material.

6. The burn dressing according to claim 1, wherein The phase change temperature of the phase change layer (2) is 15 to 37 °C.

7. The burn dressing according to claim 1, wherein The anti-adhesion layer (3) is a chitosan non-woven fabric with curcumin loaded on the surface.

8. The burn dressing according to claim 1, characterized in that, The tearable layer (4) is a release paper material.

9. The burn dressing according to claim 1, wherein The anti-adhesion layer (3) and the phase change layer (2) are adhered through a medical pressure-sensitive adhesive.

10. The burn dressing according to claim 9, characterized in that, The medical pressure-sensitive adhesive adheres the anti-adhesion layer (3) and the phase change layer (2) in a dot coating manner.

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