TWM501839U - Wound dressing - Google Patents

Abstract

A wound dressing is provided. The wound dressing sequentially includes a backing layer, an absorbing layer and a capillary micro structure layer. In addition, the capillary micro structure layer includes a plurality of capillary micro structures. Excess tissue fluid of the wound can be absorbed continuously and the wound will heal by using the wound dressing.

Description

Wound dressing

This creation relates to a wound dressing, especially a wound dressing having a capillary structure.

The natural healing of the wound in the body is a complex process that begins when it is damaged. First, the body delivers protein and other blood clotting substances through the flow of blood to the wound to minimize damage. The blood clots to prevent blood loss, while the cells devour the bacteria and debris at the wound. Next, called the healing phase of the proliferative phase, the body begins to repair itself and the granulation tissue deposits on the wound surface. The granulation tissue provides a foundation on the wound, and the cells can migrate from the periphery of the wound to the inside to close the wound. Finally, scars form over time.

Conventional wound dressings only use physical adsorption to aspirate all blood and tissue fluid exuded from the wound to keep the wound dry. However, conventional wound dressings do not control the ambient humidity around the wound, and an excessively dry environment can affect the healing of the wound.

One technique that can utilize the control of wound moisture to promote a natural healing process during the proliferative phase is known as negative pressure wound treatment (NPWT). Negative pressure wound therapy is the use of simple negative pressure Sources, such as vacuum pumps, combined with seal patches, soft suction cups, and biocompatible pore materials to create a negative pressure environment within the wound, extract wound pus and infectious material, attract healthy tissue fluids to maintain a moist therapeutic environment, and promote peripherals The blood microcirculation achieves the effect of accelerating wound healing. Negative pressure wound treatment utilizes the body's natural healing process to effectively promote blood flow to the wound area, stimulating the formation of granulation tissue above the wound and the migration of healthy tissue. Negative pressure wound therapy inhibits bacterial growth by removing fluid oozing 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 aspirated is delivered to the reservoir for storage. Therefore, in the conventional negative pressure wound treatment system, in addition to the dressing in contact with the wound surface of the wound, it is necessary to include a pump for providing a source of negative pressure, a line for connection, and a reservoir for storing excess tissue fluid. The setting of these components not only causes inconvenience when changing the dressing, but also limits the movement of the patient.

Therefore, there is still a need for a simple wound dressing that does not require the setting of a negative pressure source and a pipeline, but can still control the humidity of the wound environment and continuously adsorb excess tissue fluid at the wound without excessively drying the wound surface.

In view of this, the purpose of the present invention is to provide a lightweight wound dressing which can continuously absorb excess tissue fluid at the wound by the arrangement of the capillary microstructure layer and the absorbent layer, so that the wound is in a humid environment without infiltration, and thus Help the wound heal.

The present invention provides a wound dressing comprising a backing material; an absorbent layer on top of the backing material: and a capillary microstructured layer on top of the absorbent layer, wherein the capillary microstructured layer has a plurality of capillary microstructures.

According to one embodiment of the present invention, the capillary structure is a microporous structure and the pore size of each microporous structure is between 0.6 mm (mm) and 2.5 mm (mm), and the total surface area of the capillary microstructure is The ratio of the surface area of the aforementioned capillary microstructure layer is between 45% and 60%, and the height of the aforementioned capillary microstructure layer is between 5 mm (mm) and 20 mm (mm).

According to one embodiment of the present invention, the capillary structure is a microfibrillar structure and the distance between each microfibrillar structure is between 0.3 mm (mm) and 1.25 mm (mm), and the surface area of the capillary microstructure is summed. The ratio to the surface area of the aforementioned capillary microstructure layer is between 5% and 20%, and the height of the aforementioned capillary microstructure layer is between 5 millimeters (mm) and 20 millimeters (mm).

According to one embodiment of the present invention, the capillary microstructure layer is mechanically softened to increase the softness and elasticity of the capillary microstructure layer.

According to an embodiment of the present invention, the material of the capillary microstructure layer comprises a biocompatible polyolefin polymer, a polyester polymer, a silicone rubber, a tetrafluoroethylene polymer or a composite thereof.

According to one embodiment of the present invention, the thickness of the absorbent layer is between 2 millimeters (mm) and 20 millimeters (mm).

According to one embodiment of the present invention, the material of the absorbent layer comprises fibers, fiber sponges, foams, superabsorbent polymers, hydrogel materials, gel materials, or combinations thereof.

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

The above-identified content is intended to provide a simplified summary of the disclosure in order to provide a basic understanding of the disclosure. This written content is not a complete overview of the present disclosure, and is not intended to identify important/critical elements of the present embodiments or to define the scope of the present invention. After referring to the following embodiments, those having ordinary knowledge in the technical field of the present invention can easily understand the basic spirit of the present creation and the technical means and implementation manners adopted by the present creation.

100‧‧‧Wound dressing

110‧‧‧ Backing

120‧‧‧absorbing layer

130‧‧‧Capillary microstructure layer

131‧‧‧Capillary microstructure

H1, H2‧‧‧ height

Figure 1 is a schematic view showing the side structure of the wound dressing of the present invention.

Figure 2 is a partial enlarged view of one embodiment of the capillary structure of the wound dressing of the present invention.

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

The embodiments of the wound dressings according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same elements in the following embodiments are denoted by the same reference numerals. In the following description, an exemplary structure of the wound dressing described above will be described. In order to facilitate an understanding of the described embodiments, a number of technical details are provided below. Of course, not all embodiments require these technical details. At the same time, some well-known structures or elements are only shown in the drawings in a schematic manner to appropriately simplify the contents of the drawings. The schematics used are for the purpose of illustration and supplementary instructions. They are not necessarily true proportions and precise configurations after the implementation of the creation. Therefore, the proportions and matching of the attached drawings should not be used. Interpretation of relationships, limitations on the scope of the scope of the creation of the actual implementation.

The advantages, features, and technical methods of the present invention will be more readily understood by referring to the exemplary embodiments and the accompanying drawings, and the present invention may be implemented in various forms and should not be construed as limited thereto. The embodiments set forth herein, and vice versa, will provide a more thorough and complete and complete disclosure of the scope of the present invention, and the present invention will only be The scope of the patent application is defined.

Unless otherwise defined, all terms (including scientific and scientific terms) and proper nouns used hereinafter are used in the same meaning as commonly understood by those skilled in the art to which the present invention belongs. Those terms defined by the dictionary should be understood to have the meaning consistent with the relevant art, and will not be understood in an excessively idealized or overly formal meaning unless explicitly defined in the following.

Please refer to FIG. 1 , which is a schematic view showing the side structure 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 sequentially includes a backing material 110, an absorbent layer 120, and a capillary microstructure layer 130.

The backing material 110 is disposed above the wound. In one embodiment, the edge of the backing material 110 adjacent to one side of the wound may have an adhesive (not shown) to provide a tight seal between the backing material 110 and the skin surrounding the wound. In another embodiment, the backing material 110 is adhered to the skin surrounding the wound by an adhesive tape to create a sealed environment around the wound. Thus, the backing material 110 can serve as a microbial barrier to prevent contaminants from entering the wound and to secure the absorbent layer 120 and the capillary microstructure layer 130 above the wound. In practice, the material of the backing material 110 may be a moisture permeable membrane to Promotes the exchange of oxygen and moisture between the wound and the atmosphere. The backing material 110 can also be an impermeable membrane or a rigid component. Considering ease of use and fit to the wound, in one embodiment of the present invention, the backing material 110 is an impermeable elastic film.

The absorbent layer 120 is positioned over the backing material 110 to provide absorption of tissue fluid, and the surface area of the backing material 110 is greater than the surface area of the absorbent layer 120. The thickness H1 of the absorbent layer 120 can be adjusted according to the maximum liquid storage space required. In practice, the thickness H1 of the absorbent layer 120 can be between about 2 millimeters (mm) and 20 millimeters (mm). In one embodiment of the present invention, the material of the absorbent layer 120 comprises, but is not limited to, fibers, fiber sponges, foams, superabsorbent polymers, hydrogel materials, gel materials, or combinations thereof.

The capillary microstructure layer 130 is located on the absorbent layer 120 having a plurality of capillary microstructures 131, and the surface area of the absorbent layer 120 is greater than or equal to the surface area of the capillary microstructure layer 130 to provide uniform absorption. Capillary phenomenon (also known as capillary action) refers to the phenomenon that the liquid rises inside the thin tubular object due to the difference in cohesion and adhesion and overcomes gravity. The capillary microstructure layer 130 is in direct contact with the wound. When the cohesion of the tissue fluid flowing out of the wound and the adhesion to the capillary microstructure layer 130 is greater than the gravity of the tissue fluid, the tissue fluid can be diffused to the end of the absorption layer 120 by capillary action. By the absorption force of the absorption layer 120, the excess tissue liquid on the wound can be continuously adsorbed, so that the wound is in a humid environment without infiltration, which can effectively help the wound to heal. In addition, by the arrangement of the capillary microstructure layer 130, the wound is not directly in contact with the absorbent layer 120, so there is no problem that the conventional wound dressing excessively dries the wound surface due to continuous absorption of the tissue fluid.

In one embodiment of the present invention, the capillary microstructure layer 130 has a plurality of capillary microstructures 131, the capillary microstructures 131 are microporous, and the pore size of each of the microporous capillary microstructures 131 is between 0.6 mm (mm) and 2.5 mm (mm), and a plurality of microporous capillaries The ratio of the surface area of the wound contact surface of the microstructure 131 to the surface area of the wound contact surface of the capillary microstructure layer 130 is between 45% and 60%, and the height H2 of the capillary microstructure layer 130 is between 5 mm ( Between mm and 20 mm (mm), the microporous 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 capillary action, as shown in FIG.

In another embodiment of the present invention, the capillary microstructures 130 have a capillary structure 131 that is microfibrillated, and the distance between each of the microfibrillar capillary microstructures 131 ranges from 0.3 millimeters (mm) to 1.25 millimeters (mm). Between the total surface area of the wound contact surface of the plurality of microfibrillated capillary microstructures 131 and the surface area of the wound contact surface of the capillary microstructure layer 130 is between 5% and 20%, and the capillary microstructure The height H2 of the layer 130 is between 5 mm (mm) and 20 mm (mm), and the ciliated capillary microstructure 131 is in direct contact with the wound, and the excess tissue fluid at the wound is produced by the ciliated capillary microstructure 131. The capillary phenomenon spreads to the absorbing layer 120 as shown in FIG.

In view of the comfort of the patient when using the wound dressing 100, the capillary microstructure layer 130 that is in direct contact with the wound can be selectively mechanically softened to increase the softness and elasticity of the capillary microstructure layer 130. Considering the processability at the time of manufacture and the comfort of the patient during use, in one embodiment of the present invention, the material of the capillary microstructure layer 130 may be, for example, a biocompatible polyolefin polymer or a polyester polymer. , silicone, tetrafluoroethylene polymer or a composite thereof.

Accordingly, when using the wound dressing 100 of the present invention, In the state in which the sealed wound is formed, the excess tissue fluid on the wound diffuses to the absorbent layer 120 via the capillary microstructure layer 130 due to the capillary phenomenon, and the absorption force provided by the absorbent layer 120 can continuously produce the effect of adsorbing the excess tissue fluid. The wound dressing 100 of the present invention can appropriately absorb excess tissue liquid on the wound to maintain proper humidity of the wound, so as to maintain a good blood circulation effect at the wound, thereby promoting wound healing.

This creation has the following advantages:

1. Compared with the vacuum wound treatment used in the prior art, the wound dressing of the present invention does not need to be provided with a negative pressure source, a negative pressure controller, a pipeline, a liquid storage tank and the like, so it is lighter in use. Does not affect the patient's actions.

2. The operation mode is simple and the appearance is close to the general wound dressing.

3. Since only excess tissue fluid will diffuse to the absorbent layer, the wound dressing of the present invention can more easily control the humidity in the sealed environment without the direct contact of the absorbent material with the wound, instead of the conventional wound dressing. The wound surface is overly dry.

4. By the arrangement of the capillary microstructure layer, the tissue fluid stored in the absorbent layer does not cause the wound to infiltrate.

5. Wound dressings with different capillary microstructure layers can be used in different stages of wound healing, and different capillary layers provide different adsorption forces to match the degree of exudation at different stages.

As described above, the wound dressing according to the present invention can absorb excess tissue fluid, maintain the wound in proper humidity, and does not over-dry the wound, thereby promoting wound healing. In addition, compared to the negative used in the prior art For wound treatment, the wound dressing of the present invention is also light and easy to operate.

Although the present invention has been disclosed in the above embodiments, which are not intended to limit the present invention, the embodiments described above are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the present invention. The content of the creation and implementation of it, when it is not possible to limit the scope of the patent of this creation, that is, the equivalent changes or modifications made by the spirit of the creation of this creation should still be covered in the scope of the patent of this creation, the protection of this creation The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Wound dressing

110‧‧‧ Backing

120‧‧‧absorbing layer

130‧‧‧Capillary microstructure layer

H1, H2‧‧‧ height

Claims (10)

A wound dressing comprising: a backing material; an absorbent layer positioned over the backing; and a capillary microstructure layer disposed over the absorbent layer, wherein the capillary microstructured layer has a plurality of capillary microstructures. The wound dressing of claim 1, wherein the capillary structures are microporous structures and one of the microporous structures has an aperture diameter of between 0.6 millimeters (mm) and 2.5 millimeters (mm). The wound dressing of claim 2, wherein the ratio of the surface area of one of the capillary structures to the surface area of one of the capillary layer is between 45% and 60%. The wound dressing of claim 1, wherein one of the capillary microstructure layers has a height between 5 millimeters (mm) and 20 millimeters (mm). The wound dressing of claim 1, wherein the capillary structures are microfibrillar structures and the distance between each of the microfibrillar structures is between 0.3 millimeters (mm) and 1.25 millimeters (mm). The wound dressing of claim 5, wherein a ratio of a surface area of one of the capillary structures to a surface area of the capillary layer is between 5% and 20%. The wound dressing of claim 1, wherein the material of the capillary microstructure layer comprises a polyolefin polymer, a polyester polymer, a silicone rubber, a tetrafluoroethylene polymer or a composite thereof. The wound dressing of claim 1, wherein one of the absorbent layers has a height between 2 millimeters (mm) and 20 millimeters (mm). The wound dressing of claim 1, wherein the material of the absorbent layer comprises fibers, fiber sponges, foams, superabsorbent polymers, hydrogel materials, gel materials, or combinations thereof. The wound dressing of claim 1, wherein the backing material is an impermeable elastic film.