CN204364238U - Wound dressing - Google Patents

Abstract

The utility model provides a wound dressing, the structure of which comprises a back material, an absorbing layer and a capillary microstructure layer in sequence, wherein the capillary microstructure layer has a plurality of capillary microstructures, and the wound dressing of the utility model can be used to continuously adsorb on the wound Helps wound healing by removing excess tissue fluid without causing the wound to dry out too much.

Description

wound dressing

technical field

The utility model relates to a wound dressing, in particular to a wound dressing with capillary structure.

Background technique

The body's natural wound healing is a complex process that begins at the moment of injury. First, the body minimizes damage by delivering proteins and other clotting substances to the wound through the bloodstream. Blood clots to prevent blood loss, while cells eat bacteria and debris from the wound. Next, during the healing phase known as the proliferative phase, the body begins to repair itself and granulation tissue is deposited on the wound surface. Granulation tissue provides the basic structure on the wound, and cells can migrate from the periphery of the wound to the interior to enclose and close the wound. Finally, scarring forms over time.

Conventional wound dressings only use physical adsorption to suck out all the blood and tissue fluid exuded from the wound to keep the wound dry. However, conventional wound dressings cannot control the ambient humidity around the wound, and an excessively dry environment will affect wound healing instead.

One technique that can facilitate the natural healing process by controlling wound moisture during the proliferative phase is known as negative pressure wound treatment (NPWT). Negative pressure wound therapy uses a simple negative pressure source, such as a vacuum pump, combined with sealing patches, soft suction cups and biocompatible porous materials to form a negative pressure environment in the wound, extract wound pus and infected substances, and attract healthy tissue fluid Maintain a moist therapeutic environment and promote the surrounding blood microcirculation to accelerate wound healing. Harnessing the body's natural healing process, negative pressure wound therapy can effectively promote blood flow to the wound area, stimulating the formation of granulation tissue and the migration of healthy tissue above the wound. Negative pressure wound therapy inhibits bacterial growth by removing fluid that seeps from the wound.

However, negative pressure wound therapy uses a negative pressure source to maintain a negative pressure environment in the dressing, and the excess tissue fluid that is sucked needs to be delivered to a fluid storage tank through a pipeline for storage. Therefore, in the conventional negative pressure wound therapy system, in addition to the dressing in contact with the wound surface, it must still include components such as a pump providing a source of negative pressure, pipelines for connection, and a fluid storage tank for storing excess tissue fluid. The arrangement of these elements not only causes inconvenience when changing the dressing, but also restricts the movement of the patient.

Therefore, there is still a need for a simple wound dressing, which does not need to be equipped with a negative pressure source and pipelines, but can still control the humidity of the wound environment, continuously absorb excess tissue fluid at the wound, and will not dry the wound surface too much.

Utility model content

In view of this, one of the purposes of the present utility model is to provide a portable wound dressing, which can continuously absorb excess tissue fluid at the wound through the capillary microstructure layer and the absorbent layer, so that the wound is in a humid environment and does not appear Infiltration phenomenon, thereby helping wound healing.

The utility model provides a wound dressing, which comprises a back material; an absorption layer located on the back material; and a capillary structure layer located on the absorption layer, wherein the capillary structure layer has a plurality of capillary structures.

According to an embodiment of the present invention, the aforementioned capillary structure is a microporous structure, and the pore diameter of each microporous structure is 0.6 millimeters (mm) to 2.5 millimeters (mm).

According to an embodiment of the present invention, the ratio of the sum of the surface areas of the capillary structure to the surface area of the capillary structure layer is 45% to 60%.

According to an embodiment of the present invention, the height of the capillary microstructure layer is 5 millimeters (mm) to 20 millimeters (mm).

According to an embodiment of the present invention, the capillary microstructure is a microcilium structure, and the distance between adjacent microcilium structures is 0.3 millimeters (mm) to 1.25 millimeters (mm).

According to an embodiment of the present invention, the ratio of the sum of the surface areas of the capillary microstructure to the surface area of the capillary microstructure layer is 5% to 20%.

According to an embodiment of the present invention, the aforementioned capillary microstructure layer is a polyolefin polymer capillary microstructure layer, a polyester polymer capillary microstructure layer, a silica gel capillary microstructure layer, and a tetrafluoroethylene polymer capillary microstructure layer. Or its composite capillary structure layer.

According to an embodiment of the present invention, the thickness of the aforementioned absorbing layer is 2 millimeters (mm) to 20 millimeters (mm).

According to an embodiment of the present invention, the aforementioned absorbent layer is a fiber layer, a fiber sponge layer, a foam material layer, a superabsorbent polymer layer, a hydrogel material layer, a gel material layer or a combination thereof.

According to an embodiment of the present invention, the aforementioned back material is an impermeable elastic film.

The content of the utility model above is intended to provide a simplified summary of the disclosure, so that readers can have a basic understanding of the disclosure. This summary is not a complete overview of the disclosure, and it is not intended to point out key/critical elements of the embodiments of the present invention or to define the scope of the present invention. After referring to the following embodiments, those skilled in the art can easily understand the basic spirit of the utility model as well as the technical means and embodiments adopted by the utility model.

Description of drawings

FIG. 1 is a schematic side view of the wound dressing of the present invention.

FIG. 2 is a partial enlarged view of an embodiment of the capillary structure layer of the wound dressing of the present invention.

FIG. 3 is a partial enlarged view of another embodiment of the capillary structure layer of the wound dressing of the present invention.

Detailed ways

In the following, embodiments of the wound dressing according to the present invention will be described with reference to the relevant drawings. For ease of understanding, the same components in the following embodiments will be described with the same symbols. In the following narration, the exemplary structure of the above-mentioned wound dressing will be introduced. For the sake of easy understanding of the described embodiments, a number of technical details will be provided below. Of course, not all embodiments require these technical details. Meanwhile, some well-known structures or elements are only drawn schematically in the drawings to appropriately simplify the contents of the drawings. The purpose of the drawings used is only for illustration and auxiliary instructions, and may not be the true proportion and precise configuration of the utility model after implementation. Therefore, the ratio and configuration relationship of the drawings should not be interpreted to limit the utility model in practice. Scope of Rights in Implementation.

The advantages, features and technical methods of the present utility model will be described in more detail with reference to exemplary embodiments and accompanying drawings to make it easier to understand, and the utility model may be implemented in different forms, so it should not be construed as being limited thereto The embodiments stated here, on the contrary, for those skilled in the art, the provided embodiments will make this disclosure more thorough, comprehensive and completely convey the scope of the present utility model, and the present utility model will only be limited by the scope of the claims definition.

And unless otherwise defined, all terms (including technical and scientific terms) and proper nouns used in the following text have essentially the same meanings as commonly understood by those skilled in the art, such as those defined in commonly used dictionaries Terms should be understood to have meanings consistent with the content of the relevant art, and will not be interpreted in an overly idealized or overly formal sense unless clearly defined hereinafter.

Please refer to FIG. 1 , which is a schematic side view of the wound dressing 100 of the present invention. As shown in FIG. 1 , the structure of the wound dressing 100 of the present invention includes a backing material 110 , an absorbent layer 120 and a capillary microstructure layer 130 in sequence.

The backing material 110 is disposed above the wound. In one embodiment, the side of the backing material 110 close to the wound can have an adhesive (not shown), so that the backing material 110 can be tightly sealed with the skin around the wound. In another embodiment, the backing material 110 is pasted on the skin around the wound with an external adhesive tape to form a sealed environment around the wound. Thus, the backing 110 can act as a microbial barrier to prevent contaminants from entering the wound and to secure the absorbent layer 120 and capillary microstructured layer 130 over the wound. In practice, the material of backing 110 may be a moisture permeable membrane to facilitate the exchange of oxygen and moisture between the wound and the atmosphere. The backing 110 can also be an impermeable membrane or a rigid member. Considering the convenience of use and the fit to the wound, in one embodiment of the present invention, the back material 110 is an impermeable elastic film.

The absorbing layer 120 is located on the backing material 110 for absorbing interstitial fluid, and the surface area of the backing material 110 is greater than that of the absorbing layer 120 . The thickness H1 of the absorbing layer 120 can be adjusted according to the required maximum liquid storage space. In practice, the thickness H1 of the absorbing layer 120 can be about 2 millimeters (mm) to 20 millimeters (mm). In one embodiment of the present invention, the material of the absorbent layer 120 includes, but not limited to, fibers, fiber sponges, foam materials, superabsorbent polymers, hydrogel materials, gel materials or combinations thereof, that is, the absorbent layer 120 may be a layer of fibers, a layer of fiber sponge, a layer of foam material, a layer of superabsorbent polymer, a layer of hydrogel material, a layer of gel material, or combinations thereof.

The capillary structure layer 130 is located on the absorbing layer 120 and has a plurality of capillary structures 131 , and the surface area of the absorbing layer 120 is greater than or equal to the surface area of the capillary structure layer 130 to provide uniform absorption. Capillarity (also known as capillary action) refers to the phenomenon that liquid rises inside a thin tubular object due to the difference between cohesion and adhesion and overcomes gravity. The capillary microstructure layer 130 is in direct contact with the wound. When the cohesive force and adhesion to the capillary microstructure layer 130 of the interstitial fluid flowing out of the wound is greater than the gravity of the interstitial fluid, the interstitial fluid can diffuse to the end of the absorbent layer 120 by capillary phenomenon. With the absorption force of the absorbent layer 120, excess tissue fluid on the wound can be continuously absorbed, so that the wound is kept in a moist environment without infiltration, which can effectively help the wound to heal. In addition, the wound is not in direct contact with the absorbent layer 120 due to the provision of the capillary microstructure layer 130 , so there is no problem of excessive drying of the wound surface due to continuous absorption of tissue fluid in conventional wound dressings.

In one embodiment of the present utility model, the capillary microstructure layer 130 has a plurality of capillary microstructures 131, the capillary microstructures 131 are microporous, and the diameter of each microporous capillary microstructure 131 is 0.6 millimeters (mm) to 2.5 mm. Millimeter (mm), the ratio of the sum of the surface area of the wound contact surface of the plurality of microporous capillary microstructures 131 to the surface area of the wound contact surface of the capillary microstructure layer 130 is 45% to 60%, and the capillary microstructure layer 130 The height H2 is 5 millimeters (mm) to 20 millimeters (mm), and the microporous capillary microstructure 131 is in direct contact with the wound, and the excess tissue fluid at the wound diffuses to the absorbent layer 120 by capillary phenomenon, as shown in Figure 2 , FIG. 2 shows a partial enlarged view of an embodiment of the capillary structure layer of the wound dressing of the present invention.

In another embodiment of the present utility model, the capillary microstructure 131 of the capillary microstructure layer 130 is in the shape of microcilia, and the distance between adjacent microcilia-like capillary microstructures 131 is 0.3 millimeter (mm) to 1.25 millimeter (mm) ), the ratio of the sum of the surface area of the wound contact surface of the plurality of microcilium-like capillary microstructures 131 to the surface area of the wound contact surface of the capillary microstructure layer 130 is 5% to 20%, and the height H2 of the capillary microstructure layer 130 is 5 millimeters (mm) to 20 millimeters (mm), the microcilium-like capillary microstructure 131 is in direct contact with the wound, and the excess tissue fluid at the wound is diffused to the absorbent layer 120 by the capillary phenomenon generated between the cilium-like capillary microstructures 131 , as shown in FIG. 3, FIG. 3 depicts a partially enlarged view of another embodiment of the capillary structure layer of the wound dressing of the present invention.

Considering the comfort of the patient when using the wound dressing 100 , the capillary microstructure layer 130 directly in contact with the wound can be selectively softened mechanically to increase the softness and elasticity of the capillary microstructure layer 130 . Considering the processability during manufacture and the comfort of patients during use, in one embodiment of the present invention, the material of the capillary microstructure layer 130 can be, for example, biocompatible polyolefin polymers, polyester polymers, etc. Molecule, silica gel, tetrafluoroethylene polymer or its composite, that is, the capillary microstructure layer 130 can be a polyolefin polymer capillary microstructure layer, a polyester polymer capillary microstructure layer, a silica gel capillary microstructure layer, tetrafluoroethylene The ethylene polymer capillary structure layer or its composite capillary structure layer.

Accordingly, when using the wound dressing 100 of the present invention, in the state where the wound is sealed with the backing material 110, the excess tissue fluid on the wound diffuses to the absorbent layer 120 through the capillary microstructure layer 130 due to capillary phenomenon, and absorbs The absorption force provided by the layer 120 can continuously produce the effect of absorbing excess tissue fluid. The wound dressing 100 of the present utility model can moderately absorb excess tissue fluid on the wound, so that the wound maintains an appropriate humidity, so that the wound maintains a good blood circulation effect, thereby promoting wound healing.

The utility model has the following advantages:

1. Compared with the negative pressure wound treatment used in the conventional technology, because the wound dressing of the present invention does not need additional components such as negative pressure source, negative pressure controller, pipeline and liquid storage tank, it is more convenient to use, It will not affect the movement of the patient.

2. The operation method is simple, and the appearance is similar to that of general wound dressings.

3. Because only the excess tissue fluid will diffuse to the absorbent layer, compared with the general traditional wound dressing, the wound dressing of the utility model can more easily control the humidity in the sealed environment, and will not cause the wound to become damaged due to the direct contact of the absorbent material with the wound. Excessive dryness of the wound surface.

4. With the arrangement of the capillary structure layer, the interstitial fluid stored in the absorbent layer will not infiltrate the wound.

5. Wound dressings with different capillary structure layers can be selected in different stages of wound healing. Different capillary structure layers provide different adsorption forces to match the degree of exudation in different stages.

Based on the above, according to the wound dressing of the present invention, excess tissue fluid can be absorbed, so that the wound can be maintained in an appropriate humidity without excessive drying of the wound, and can promote wound healing. In addition, compared with the negative pressure wound treatment used in the prior art, the wound dressing of the present invention also has the advantages of portability and simple operation.

Although the utility model has been disclosed as above in terms of implementation, it is not intended to limit the utility model. The above-mentioned embodiments are only to illustrate the technical ideas and characteristics of the utility model, and its purpose is to enable those skilled in the art to understand the utility model. The content of the new model and its implementation should not be used to limit the patent scope of the present utility model, that is, all equal changes or modifications made according to the spirit disclosed by the utility model should still be covered within the patent scope of the utility model. The scope of protection of a utility model should be defined by the claims.

Claims (10)

1. A wound dressing, characterized in that the wound dressing comprises: back material; an absorbent layer on the backing; and The capillary structure layer is located on the absorption layer, wherein the capillary structure layer has a plurality of capillary structures. 2 . The wound dressing as claimed in claim 1 , wherein the plurality of capillary structures are microporous structures, and the diameter of each microporous structure is 0.6 mm to 2.5 mm. 3. The wound dressing as claimed in claim 2, wherein the ratio of the sum of the surface areas of the plurality of capillary structures to the surface area of the capillary microstructure layer is 45% to 60%. 4. The wound dressing according to claim 1, characterized in that the capillary structure layer has a height of 5 mm to 20 mm. 5 . The wound dressing as claimed in claim 1 , wherein the plurality of capillary structures are microcilia, and the distance between adjacent microcilia is 0.3 mm to 1.25 mm. 6. The wound dressing as claimed in claim 5, wherein the ratio of the sum of the surface areas of the plurality of capillary structures to the surface area of the capillary microstructure layer is 5% to 20%. 7. The wound dressing as claimed in claim 1, wherein the capillary microstructure layer is a polyolefin polymer capillary microstructure layer, a polyester polymer capillary microstructure layer, a silica gel capillary microstructure layer, tetrafluoroethylene A polymeric capillary microstructured layer or a composite capillary microstructured layer thereof. 8. The wound dressing according to claim 1, characterized in that the absorbent layer has a height of 2 mm to 20 mm. 9. The wound dressing according to claim 1, wherein the absorbent layer is a fiber layer, a fiber sponge layer, a foam layer, a superabsorbent polymer layer, a hydrogel material layer, a gel material layer or a combination thereof . 10. The wound dressing of claim 1, wherein the backing material is an impermeable elastic film.