CN215504592U - Hydrogel dressing for deep wound surface - Google Patents

Abstract

The embodiment of the utility model discloses a hydrogel dressing for deep wound surfaces, and relates to the technical field of medical dressings. The hydrogel dressing for the deep wound surface comprises a back lining layer, a liquid absorption layer, a matrix layer and a protective layer which are sequentially arranged from outside to inside, wherein the matrix layer is a hydrogel layer. The hydrogel dressing for the deep wound surface, provided by the utility model, has the characteristics that the hydrocolloid dressing can soften the wound surface slough and is convenient to debride and the foam dressing can effectively absorb and permeate, can realize continuous, safe and effective relief of wound surface pain and promotion of repair and healing of the deep wound surface through simple and reasonable layered matching, and can be suitable for different periods in the deep wound surface healing process.

Description

Hydrogel dressing for deep wound surface

Technical Field

The utility model belongs to the technical field of medical dressings, and particularly relates to a hydrogel dressing for deep wound surfaces.

Background

Deep wounds caused by burns, pressure sores, diabetic foot ulcers and the like are common in clinical treatment. The epidermis, dermis and subcutaneous tissues of the deep wound surface are seriously damaged, so that blood circulation is disturbed, exudates are gathered, necrotic tissues occupy the space, and the wound surface is difficult to self-heal. Meanwhile, the long-term exposure of the wound surface easily causes bacterial infection, so that the condition of the disease is aggravated, such as deepening and expanding the wound surface and prolonging the healing time of the wound surface. Thus, in addition to using preferred treatments including, but not limited to, a stratified thickness skin graft, pre-treatment debridement and post-treatment healing of small residual wounds are equally important. On one hand, in the early stage of treatment, the wound surface has hardened sapropel and pus seepage, and in order to be beneficial to accelerating wound healing, an effective means is adopted to soften and remove the sapropel or to make the sapropel autolyzed. On the other hand, in the later period of treatment, the residual small wound surface is difficult to heal due to possible factors such as untimely skin grafting of the wound surface, overlarge gap between transplanted autologous skin sheets, intractable bacterial infection and the like, and even if the wound surface is barely healed, obvious scabs are left on the wound surface, so that poor healing is caused. Recent studies have shown that moist dressings can safely and effectively promote healing of deep wounds. However, the healing period is different, and the selected dressing is different, for example, dressing suitable for cleaning the sapropel is preferably hydrocolloid dressing, dressing suitable for absorbing and permeating is preferably foam dressing, dressing suitable for continuously promoting the healing of the small wound surface is preferably antibacterial dressing, silicone dressing and the like.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the embodiment of the utility model is how to provide a hydrogel dressing which is suitable for performing multiple functions in different periods in the deep wound healing process.

In order to solve the above problems, an embodiment of the present invention provides a hydrogel dressing for a deep wound surface, where the hydrogel dressing for a deep wound surface includes a backing layer, a liquid absorption layer, a matrix layer, and a protection layer, which are sequentially disposed from outside to inside, and the matrix layer is a hydrogel layer.

The further technical proposal is that the material of the back lining layer is spunlace non-woven fabric or polyurethane waterproof semipermeable membrane; the liquid absorbing layer is made of activated carbon fibers or pressure-sensitive adhesive.

The further technical scheme is that the lower side of the backing layer is compounded with the low-sensitivity acrylate adhesive, and the lower side of the backing layer is matched and attached with the upper side of the liquid absorbing layer.

The further technical scheme is that the hydrogel layer is constructed by combining a synthetic functional polymer material with a biological 3D printing technology; the hydrogel layer was in the form of a square grid of hydrogel.

The further technical scheme is that the hydrogel layer is attached to the liquid absorbing layer and the protective layer through self-adhesion.

The further technical proposal is that the lower side of the hydrogel layer is compounded with acrylate adhesive with low sensitivity.

The further technical scheme is that the protective layer is made of release film or glassine paper.

The further technical scheme is that the protective layer is composed of two pieces of glassine paper with the same size, and the area of the area covered by each piece of glassine paper is larger than that of the 1/2 hydrogel dressing.

The further technical proposal is that the corners of the back lining layer, the liquid absorbing layer, the substrate layer and the protective layer are all set to be round corners.

The further technical proposal is that the thickness of the back lining layer is 0.05-0.2 mm; the thickness of the liquid absorbing layer is 2-4 mm; the thickness of the substrate layer is 1-3mm, and the thickness of the protective layer is 0.05-0.2 mm.

Compared with the prior art, the embodiment of the utility model can achieve the following technical effects:

1. the hydrogel layer directly acts in contact with the wound surface: (1) the hydrogel component comprises modified sodium alginate, and a hydrophilic polymer chain contained in the modified sodium alginate can provide high water absorption, so that the hydrogel can be rich in water with the mass more than 90% of the mass of the hydrogel, and can provide strong mild moisturizing capability; (2) the hydrogel composition comprises an extracellular matrix generated by human liposuction, is rich in bioactive components such as collagen, glycosaminoglycan, chondroitin sulfate, elastin and the like, simulates an extracellular microenvironment in a human skin layer to a certain extent, provides sufficient nutrient substances for cell proliferation and differentiation, and accelerates wound healing; (3) the hydrogel also comprises trace amount of propyl hydroxybenzoate bacteriostatic agent, and the verification proves that the bacteriostatic rate reaches more than 99 percent, so that the hydrogel can effectively prevent bacterial proliferation and alleviate intractable bacterial infection. (4) The hydrogel adopts two different modes of crosslinking by light energy groups and crosslinking by light to form a dynamic interpenetrating network, and the biomechanical property and the mechanical property of the hydrogel comprise self-repairability, high strength, high toughness and the like, so that even if the hydrogel is stretched, deformed or dispersed by external force, when the external force disappears, the hydrogel can automatically repair the damage, recover the original property of the material and prolong the service life of the hydrogel; (5) the hydrogel can be used as a scaffold carrier to provide more living space and structural support for processes such as cell growth, angiogenesis and the like in the aspect of deep wound surface application, and meanwhile, the hydrogel has good biocompatibility and degradability and supports clinical application.

2. The hydrogel layer has the effect of absorbing and permeating, but the liquid absorbing layer is added to further provide more space for absorbing the wound seepage.

3. The utility model takes the characteristics of convenient debridement of wound surface slough softened by hydrocolloid dressing and the characteristics of effective absorption and permeation of foam dressing into consideration, can realize continuous, safe and effective relief of wound surface pain and promotion of deep wound surface repair and healing through simple and reasonable layered matching, and can be suitable for different periods in the deep wound surface healing process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hydrogel dressing for deep wound bed according to an embodiment of the present invention;

fig. 2 is a physical diagram of a hydrogel layer of a hydrogel dressing for deep wound bed according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a hydrogel layer of a hydrogel dressing for deep wound bed according to an embodiment of the present invention.

Reference numerals

A backing layer 1, a liquid absorbent layer 2, a substrate layer 3 and a protective layer 4.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like elements in the drawings. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the utility model. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1 to 3, an embodiment of the present invention provides a hydrogel dressing for a deep wound surface, where the hydrogel dressing includes a backing layer 1, a liquid absorbent layer 2, a matrix layer 3, and a protective layer 4, which are sequentially disposed from outside to inside (the direction away from the wound surface is outward).

Wherein the substrate layer 3 is a hydrogel layer. The hydrogel layer is formed by combining a synthetic functional polymer material with a biological 3D printing technology, the hydrogel layer is a square latticed hydrogel, the real object is shown in figure 2, and a schematic diagram of a grid structure is shown in figure 3. Since the hydrogel layer itself has excellent self-adhesiveness, it can be bonded to a base material such as the lower side of the liquid absorbent layer 2 and the upper side of the protective layer 4 without using an adhesive. Certainly, in order to ensure the adhesiveness of the hydrogel layer and the wound surface, a layer of low-sensitivity acrylate adhesive can be compounded on the lower side of the hydrogel layer, and in order to prevent the wound surface from being adhered and causing pain aggravation when the hydrogel dressing is removed, the acrylate adhesive needs to be treated by low viscosity.

Further, the backing layer 1 is made of spunlace non-woven fabrics or polyurethane waterproof semipermeable membranes; preferably, the material of the backing layer 1 is spunlace nonwoven fabric. The spunlace nonwoven fabric has the characteristics of mildness and air permeability, and is used for fixing the substrate layer 3 on a deep wound surface.

Further, the liquid absorbent layer 2 is made of activated carbon fibers or pressure sensitive adhesive. Preferably, the liquid absorbent layer 2 is made of activated carbon fibers, so that the thickness of the liquid absorbent layer 2 is reduced, and more space is provided for absorbing wound seepage.

Furthermore, the lower side of the backing layer 1 is compounded with a low-sensitivity acrylate adhesive, and the lower side of the backing layer 1 is fit and attached to the upper side of the liquid absorbing layer 2. The acrylate adhesive with low sensitivity can ensure the reliability of the adhesion.

Further, the material of the protective layer 4 is release film or glassine paper. Preferably, the material of the protective layer 4 is glassine.

Further, the protective layer 4 consisted of two sheets of glassine paper of uniform size, each glassine paper individually covering an area greater than the area of the 1/2 hydrogel dressing. Therefore, when the first glassine paper is attached to the center line along the outer edge of the hydrogel, the first glassine paper can be folded outwards, and when the second glassine paper is attached to the hydrogel layer along the outer edge of the other side of the hydrogel, the outer folded edge of the first glassine paper can be covered, so that the compact protective layer 4 is formed.

Further, in order to avoid discomfort and pain caused by sharp edges and deep wound surface of the hydrogel dressing in use, the corners of the backing layer 1, the liquid absorption layer 2, the matrix layer 3 and the protective layer 4 are all set to be round corners.

Further, the backing layer 1 has a thickness of 0.05-0.2 mm. For example, in one embodiment, the backing layer 1 has a thickness of 0.15 mm.

The thickness of the liquid absorbing layer 2 is 2-4 mm. For example, in one embodiment, the liquid absorbent layer 2 has a thickness of 3 mm.

The thickness of the substrate layer 3 is 1-3 mm. For example, in one embodiment, the thickness of the substrate layer 3 is 2 mm.

The thickness of the protective layer 4 is 0.05-0.2 mm. For example, in one embodiment, the thickness of the protective layer 4 is 0.1 mm.

The using method of the utility model comprises the following steps: before use, the wound surface is cleaned according to a normal procedure, and after the packaging bag is torn open, the glassine is torn off and is applied to the affected part. Can be cut at will according to the shape of the wound surface, and the coverage area is ensured to be at least more than 2cm larger than the skin around the wound surface.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, while the utility model has been described with respect to the above-described embodiments, it will be understood that the utility model is not limited thereto but may be embodied with various modifications and changes.

While the utility model has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The hydrogel dressing for the deep wound surface is characterized by comprising a back lining layer, a liquid absorption layer, a matrix layer and a protective layer which are sequentially arranged from outside to inside, wherein the matrix layer is a hydrogel layer;

the back lining layer is made of spunlace non-woven fabrics or polyurethane waterproof semipermeable membranes; the liquid absorbing layer is made of activated carbon fibers or pressure-sensitive adhesive;

the hydrogel layer was in the form of a square grid of hydrogel.

2. A hydrogel dressing for deep wound dressing according to claim 1, wherein the lower side of the backing layer is compounded with a hypoallergenic acrylate adhesive, and the lower side of the backing layer is fitted against the upper side of the wicking layer.

3. A hydrogel dressing for deep wounds according to claim 1, wherein the hydrogel layer is attached to the liquid absorbent layer and the protective layer by its self-adhesiveness.

4. A hydrogel dressing for deep wound dressing according to claim 1, wherein the underside of the hydrogel layer is compounded with a hypoallergenic acrylate adhesive.

5. The hydrogel dressing for deep wound according to claim 1, wherein the protective layer is made of release film or glassine paper.

6. The hydrogel dressing for deep wound bed according to claim 1, wherein the protective layer is composed of two pieces of glassine paper with the same size, and the area of the area covered by each glassine paper is larger than the area of 1/2 hydrogel dressing.

7. The hydrogel dressing for deep wound bed according to claim 1, wherein the corners of the backing layer, the liquid absorbent layer, the matrix layer and the protective layer are rounded.

8. A hydrogel dressing for deep wounds according to claim 1, characterised in that the backing layer has a thickness of 0.05-0.2 mm; the thickness of the liquid absorbing layer is 2-4 mm; the thickness of the substrate layer is 1-3mm, and the thickness of the protective layer is 0.05-0.2 mm.

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