Trauma patch

Abstract

This application relates to a wound dressing, comprising: a transparent adhesive layer, an absorbent layer, an antibacterial layer, a release layer, and a release paper; the absorbent layer is disposed at the center of the upper surface of the transparent adhesive layer, the antibacterial layer is disposed on the upper surface of the absorbent layer, the release layer is disposed on the upper surface of the antibacterial layer, and the release paper is disposed on the upper surface of the release layer and adhered to the transparent adhesive layer; at least one observation window is provided through the absorbent layer, the antibacterial layer, and the release layer; the size of the observation window is much smaller than the size of the antibacterial layer. Using this wound dressing allows observation of wound healing through the transparent adhesive layer and the observation window, and guides precise replacement of the wound dressing based on the observed wound healing status. It also allows monitoring of wound healing progress, signs of infection, and whether wound exudation has increased.

Description

Technical Field

[0001] This application relates to the field of medical supplies technology, and in particular to a wound dressing. Background Technology

[0002] Wound dressings are a common medical supply in daily life, typically used to protect wounds and absorb exudate to prevent secondary injury from exposed wounds. Wound dressings need to be changed regularly to avoid hindering wound healing or causing unnecessary waste due to over-changing them. Currently, healthcare professionals usually determine the need for wound dressing changes based on their experience. However, inexperienced users often encounter problems such as delayed changes leading to wound infection or over-changing them, resulting in unnecessary waste. Utility Model Content

[0003] Therefore, it is necessary to provide a wound dressing that can better prevent wound infection and promote wound healing, while avoiding unnecessary waste caused by excessively frequent dressing changes, to address the aforementioned technical problems.

[0004] A wound dressing includes: a transparent adhesive layer, an absorbent layer, an antibacterial layer, an isolation layer, and a release paper;

[0005] An absorbent layer is provided at the middle position of the upper surface of the transparent adhesive layer, an antibacterial layer is provided on the upper surface of the absorbent layer, an isolation layer is provided on the upper surface of the antibacterial layer, and the release paper is covered on the upper surface of the isolation layer and bonded to the transparent adhesive layer.

[0006] At least one observation window is provided through the liquid-absorbing layer, the antibacterial layer, and the isolation layer; the size of the observation window is much smaller than the size of the antibacterial layer.

[0007] In one embodiment, the transparent adhesive layer is a polytetrafluoroethylene microporous membrane or a polyurethane film.

[0008] In one embodiment, medical pressure-sensitive adhesive is added to the transparent adhesive layer.

[0009] In one embodiment, the transparent adhesive layer contains silver nanoparticles at the location where it matches the observation window.

[0010] In one embodiment, the antibacterial layer contains silver nanoparticles.

[0011] In one embodiment, the antibacterial layer contains sustained-release antibacterial particles; the sustained-release antibacterial particles are loaded with silver nanoparticles.

[0012] In one embodiment, the absorbent layer is made of PVA sponge, foam dressing, cotton, sodium carboxymethyl cellulose fiber, or polyurethane foam.

[0013] In one embodiment, the size of the observation window is 3-6 mm.

[0014] In one embodiment, there are multiple observation windows; the number of observation windows is determined by the size of the antibacterial layer.

[0015] In one embodiment, the shape of the observation window is circular, square, rhomboid, heart-shaped, or triangular.

[0016] The aforementioned wound dressing absorbs wound exudate through an absorbent layer, disinfects the wound through an antibacterial layer, prevents the wound from adhering to the antibacterial layer through an isolation layer, allows observation of the local wound healing status through an observation window that runs through the absorbent layer, antibacterial layer, and isolation layer, and adheres the wound dressing to the skin through a transparent adhesive layer. The wound healing status can be observed through the transparent adhesive layer and the observation window, and the wound healing status can be guided for precise replacement of the wound dressing based on the observed wound healing status. It can also monitor the wound healing progress, the presence of signs of infection, and whether the wound exudate has increased. Attached Figure Description

[0017] Figure 1 This is a side view of the structure of a wound dressing in one embodiment;

[0018] Figure 2 This is a top view of the structure of a wound dressing in use in one embodiment;

[0019] Figure 3 This is a top view of the structure of the wound dressing in use in another embodiment;

[0020] The diagram shows: 1. Transparent adhesive layer; 2. Liquid-absorbing layer; 3. Antibacterial layer; 4. Isolation layer; 5. Release paper; 6. Observation window. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of 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 not intended to limit the scope of this application.

[0022] like Figure 1As shown, in one embodiment, a wound dressing is provided, characterized in that it includes: a transparent adhesive layer 1, an absorbent layer 2, an antibacterial layer 3, an isolation layer 4, and a release paper 5; the absorbent layer 2 is disposed at the middle position of the upper surface of the transparent adhesive layer 1, the antibacterial layer 3 is disposed on the upper surface of the absorbent layer 2, the isolation layer 4 is disposed on the upper surface of the antibacterial layer 3, and the release paper 5 covers the upper surface of the isolation layer 4 and is adhesively connected to the transparent adhesive layer 1; at least one observation window 6 is provided through the absorbent layer 2, the antibacterial layer 3, and the isolation layer 4; the size of the observation window 6 is much smaller than the size of the antibacterial layer 3. Figure 2 As shown, an observation window is provided in the absorbent layer, antibacterial layer and isolation layer.

[0023] The upper surface of the transparent adhesive layer 1 is provided with adhesive. The upper and lower surfaces of the antibacterial layer 3 are connected to the isolation layer 4 and the absorbent layer 2, respectively. The connection methods between the absorbent layer 2 and the antibacterial layer 3 include, but are not limited to, needle punching and hydroentangling. The surface dimensions of the absorbent layer 2, the antibacterial layer 3, and the isolation layer 4 are the same, and the dimensions of each layer are smaller than the surface dimensions of the adhesive layer. The adhesive layer, the absorbent layer 2, the antibacterial layer 3, and the isolation layer 4 are all provided with air pores. A portion of the upper surface of the adhesive layer is connected to the absorbent layer 2, and another portion is connected to the release paper 5.

[0024] At least one through-hole serves as an observation window 6, penetrating the absorbent layer 2, antibacterial layer 3, and isolation layer 4. This allows for real-time observation of wound exudation, healing progress, signs of infection, and the need for wound dressing replacement through the transparent adhesive layer 1 and the observation window 6. The size of the observation window 6 is significantly smaller than that of the antibacterial layer 3 to prevent issues such as the absorbent layer 2 being unable to effectively absorb wound exudate and the antibacterial layer 3 being unable to effectively provide antibacterial and anti-inflammatory treatment to the wound. The size of the observation window 6 cannot be too small to ensure proper observation of the local wound condition.

[0025] In one embodiment, the release paper 5 is a one-piece structure, with its surface shape and size matching those of the adhesive layer. The release paper 5 is bonded to the adhesive layer around its perimeter and covers the upper surface of the release layer 4 in the middle. Alternatively, the release paper 5 comprises two symmetrically fixed components that can be opened and closed and are fixed to the left and right ends (or front and back ends) of the adhesive layer, covering the upper surface of the release layer 4. The release paper 5 can completely cover the adhesive side of the adhesive layer and the upper surface of the release layer 4.

[0026] In one embodiment, the size of the observation window 6 is 3-6 mm. The specific size of the observation window 6 can be customized according to the actual situation, such as 5 mm, and is not specifically limited here.

[0027] In one embodiment, the transparent adhesive layer 1 is a polytetrafluoroethylene microporous membrane or a polyurethane film.

[0028] The polytetrafluoroethylene microporous membrane and polyurethane film have high transparency, as well as good flexibility, breathability, and waterproofness. In one embodiment, the size of the observation window 6 is 3-6 mm. As a transparent adhesive layer 1, it can prevent external liquid water from entering the wound dressing while allowing water vapor to dissipate, ensuring the breathability of the wound dressing.

[0029] In one embodiment, medical pressure-sensitive adhesive is added to the transparent adhesive layer 1. The medical pressure-sensitive adhesive is disposed on the upper surface of the transparent adhesive layer 1 to facilitate the firm adhesion of the wound dressing to the skin. It is understood that the amount and distribution of the medical pressure-sensitive adhesive on the surface of the transparent adhesive layer 1 need to be properly set to avoid affecting the breathability and skin adhesion of the wound dressing, thereby balancing both aspects.

[0030] In one embodiment, the transparent adhesive layer 1 contains silver nanoparticles at the position where it aligns with the observation window 6. Since there is no antibacterial layer 3 inside the observation window 6, the placement of silver nanoparticles on the transparent adhesive layer 1 at the contact point with the observation window 6 can prevent external bacteria from invading the wound dressing.

[0031] In one embodiment, the antibacterial layer 3 contains silver nanoparticles. The antibacterial layer 3 is a silver nanoparticle-loaded dressing layer. The antibacterial layer 3 includes, but is not limited to, a nano-treated needle-punched cotton layer. Because silver nanoparticles have antibacterial, anti-inflammatory, and wound-healing effects, wound dressings containing silver nanoparticles can effectively prevent wound infection and provide antibacterial and anti-inflammatory treatment to inflamed and infected wounds, thereby promoting wound healing. Furthermore, the silver nanoparticles in the antibacterial layer 3 surrounding the observation window 6 can also provide antibacterial and anti-inflammatory treatment to the wound within the observation window 6, and the absorbent layer 2 surrounding the observation window 6 can absorb wound exudate within the observation window 6. Therefore, by setting an observation window 6 of a reasonable size, it is convenient to observe the wound condition while still promoting the healing progress of the local wound within the observation window 6.

[0032] In one embodiment, the antibacterial layer 3 contains sustained-release antibacterial particles; these sustained-release antibacterial particles carry silver nanoparticles. The sustained-release antibacterial particles can control the release rate of the silver nanoparticles, allowing them to continuously release silver ions over a longer period, maintaining a certain concentration of silver ions at the wound site, thereby more effectively inhibiting bacterial growth and reproduction. The sustained-release antibacterial particles can also dynamically adjust the release rate of silver ions based on factors such as wound exudate volume, pH value, and degree of inflammation. For example, when wound exudate increases, the release rate of silver nanoparticles in the sustained-release antibacterial particles will accelerate; conversely, when wound inflammation decreases, the release rate of silver nanoparticles will slow down. The sustained-release antibacterial particles can utilize materials and preparation processes disclosed in existing technologies, which will not be elaborated upon here.

[0033] In one embodiment, the absorbent layer 2 is made of PVA sponge, foam dressing material, cotton, sodium carboxymethyl cellulose fiber, or polyurethane foam. The absorbent layer 2 is used to absorb wound exudate to prevent it from accumulating at the wound site and causing inflammation and infection. Sodium carboxymethyl cellulose fibers have numerous micropores that can quickly absorb and guide wound exudate to the edges of the dressing, preventing exudate buildup at the wound site. Polyurethane foam has a porous structure that can quickly absorb and store large amounts of exudate to keep the wound dry.

[0034] In one embodiment, there are multiple observation windows 6; the number of observation windows 6 is determined by the size of the antibacterial layer 3. Setting multiple observation windows 6 according to the size of the antibacterial layer 3 allows for observation of more local wound conditions while ensuring wound healing progress. The number of observation windows 6 can also be determined in conjunction with the shape of the antibacterial layer 3. Figure 3 As shown, the absorbent layer, antibacterial layer, and isolation layer are connected by three observation windows.

[0035] In one embodiment, the observation window 6 is circular, square, rhomboid, or triangular in shape. The shape of the observation window 6 can be customized according to actual needs, determined according to the shape of the antibacterial layer 3, or determined according to the user, such as a heart-shaped observation window 6 for children's wound dressings.

[0036] In one embodiment, the isolation layer 4 is a medical nonwoven fabric, a polytetrafluoroethylene film, a gel layer, or a PE film.

[0037] It is worth noting that, Figure 1 and Figure 2 The present invention only illustrates a portion of the structure of the wound dressing provided in one or more embodiments of this application and is not intended to limit the scope of the invention.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wound dressing, characterized in that, include: Transparent adhesive layer, absorbent layer, antibacterial layer, release layer, and release paper; An absorbent layer is provided at the middle position of the upper surface of the transparent adhesive layer, an antibacterial layer is provided on the upper surface of the absorbent layer, an isolation layer is provided on the upper surface of the antibacterial layer, and the release paper is covered on the upper surface of the isolation layer and bonded to the transparent adhesive layer. At least one observation window is provided through the liquid-absorbing layer, the antibacterial layer, and the isolation layer; the size of the observation window is much smaller than the size of the antibacterial layer.

2. The wound dressing according to claim 1, characterized in that, The transparent adhesive layer is made of polytetrafluoroethylene microporous membrane or polyurethane film.

3. The wound dressing according to claim 1, characterized in that, The transparent adhesive layer contains medical pressure-sensitive adhesive.

4. The wound dressing according to claim 1, characterized in that, The transparent adhesive layer contains silver nanoparticles at the location where it matches the observation window.

5. The wound dressing according to claim 1, characterized in that, The antibacterial layer contains silver nanoparticles.

6. The wound dressing according to claim 5, characterized in that, The antibacterial layer contains sustained-release antibacterial particles; the sustained-release antibacterial particles are loaded with silver nanoparticles.

7. The wound dressing according to claim 1, characterized in that, The absorbent layer is made of PVA sponge, foam dressing, cotton, sodium carboxymethyl cellulose fiber, or polyurethane foam.

8. The wound dressing according to any one of claims 1 to 7, characterized in that, The size of the observation window is 3~6mm.

9. The wound dressing according to any one of claims 1 to 7, characterized in that, There are multiple observation windows; the number of observation windows is determined by the size of the antibacterial layer.

10. The wound dressing according to any one of claims 1 to 7, characterized in that, The shape of the observation window can be circular, square, rhomboid, heart-shaped, or triangular.

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