The present invention relates to a wound dressing.
Wounds (e.g., lacerations, abrasions, punctures and burns) are generally treated by allowing natural healing or by using gauze, cotton pads or other wrapping materials to cover the wounds. However, these treatments allow the wound to have contact with the air, so the surface of the wound can easily become dry, and dryness can increase the time required for the wound to heal and may lead to scarring. Therefore, many kinds of wound dressings which can keep a wound in a slightly humid environment are available on the market, some examples being film dressings, foam dressings, hydrophilic dressings, or antibacterial dressings, so consumers can choose different kinds of wound dressings according to the types of wounds.
The aforementioned different kinds of wound dressings all have flat and multi-layer structures. It is suitable to use the aforementioned wound dressings to cover wounds on flat and large areas, such as on the arms, legs, or torso. However, the aforementioned wound dressings do not allow easy coverage of wounds on joints, fingers, toes, or other locations that require frequent movement or are small in area. In addition to the problem of areas where the wound dressing cannot be adhered, such dressings are more likely to allow air to contact the wound, so the wound cannot be kept in a moist environment and the effect of the wound dressing on promoting wound healing is reduced. Therefore, the prior art still has room for improvement.
In view of the aforesaid drawbacks of the prior art, it is an objective of the present disclosure to provide a wound dressing which comprises a carrier having a plurality of fixed portions to overcome drawbacks of the prior art, namely, that the conventional wound dressing cannot easily be attached to an area that requires frequent activity or that is small.
In order to achieve the above objectives, the present disclosure provides a wound dressing, which is used to adhere to a non-planar wound. The wound dressing comprises a carrier, a dressing layer, an adhesive layer and a release paper layer. The carrier comprises a central portion, a plurality of fixed portions and a plurality of slashes. The central portion has a geometric center. The fixed portions are disposed around the central portion, and the number of the fixed portions is between 3 and 20. Each of the slashes is located between two fixed portions. The carrier has a first length, and each of the slashes has a second length. The first length is a shortest distance from an outer edge of a fixed portion to the geometric center, and the second length is a length of each of the slashes. The ratio of the second length to the first length is between 0.2 and 0.8. The dressing layer is disposed on the central portion and comprises a hydrogel. The adhesive layer is disposed on the fixed portions. The release paper layer is disposed on a surface of the dressing layer and the adhesive layer opposite to the carrier. With the above structures, after the release paper layer is removed from the dressing layer and the adhesive layer, the dressing layer can be applied to cover a non-planar wound such that one side of one of the fixed portions attaches to one side of the adjacent fixed portion through the adhesive layer and the carrier presents a three-dimensional structure.
In an embodiment of the present disclosure, the carrier further comprises a spacing portion located between the central portion and the fixed portion.
In an embodiment of the present disclosure, the width of the spacing portion is between 0.05 cm and 1.5 cm.
In an embodiment of the present disclosure, the carrier is a round shape, and the geometric center of the central portion is a center of the carrier.
In an embodiment of the present disclosure, the spacing portion is a ring shape.
In an embodiment of the present disclosure, the slashes extend linearly from the outer edge of the fixed portions toward the center.
In an embodiment of the present disclosure, the area of each of the fixed portions is substantially the same.
In an embodiment of the present disclosure, the number of the slashes is the same as the number of the fixed portions.
In an embodiment of the present disclosure, the carrier further comprises an elastic fiber layer, and the dressing layer and the adhesive layer are disposed above the elastic fiber layer.
In an embodiment of the present disclosure, the carrier further comprises a polymer material layer, and the elastic fiber layer is disposed above the polymer material layer.
In an embodiment of the present disclosure, the hydrogel comprises hydroxyethyl methacrylate, glycerol and polyethylene glycol.
As above, the wound dressing of the present invention comprises a carrier, a dressing layer, an adhesive layer and a release paper layer. The carrier has a central portion, a plurality of fixed portions and a plurality of slashes. The dressing layer is disposed on the central portion, and the adhesive layer is disposed on the fixed portions. The fixed portions can be overlapped with the adjacent fixed portion and the carrier presents a three-dimensional structure such that the wound dressing can be flatly attached to a non-planar wound (e.g., a wound on a joint, finger, toe, etc.). Further, the number limitation of the fixed portions (between 3 and 20) and the size limitation of the slashes (the ratio of the second length to the first length being between 0.2 and 0.8) ensure that the area of the adhesive layer of each of the fixed portions is sufficient to adhere to the skin and to the adjacent fixed portion firmly for easy dressing.
In addition, the dressing layer has the hydrogel to keep the wound (i.e., the non-planar wound) in a moist environment that is conducive to wound healing and effectively relieve trauma wounds and burns.
In the drawings, wherein similar reference numerals denote similar elements throughout the several views:
In order to make the structure and characteristics as well as the effectiveness of the present disclosure further understood and recognized, a detailed description of the present disclosure is provided as follows along with embodiments and accompanying figures.
Please refer to
Referring to
The two adjacent fixed portions 13 are not connected to each other but are connected to the spacing portion 12 by one end of the fixed portions 13. Specifically, in this embodiment, the fixed portions 13 and the slashes 14 are formed by cutting the carrier 10. Each of the slashes 14 is located between two adjacent fixed portions 13, and the number of the slashes 14 is the same as that of the fixed portions 13. It should be noted that the central portion 11, the spacing portion 12 and the fixed portions 13 of the carrier 10 are virtual areas for facilitating the cutting and coating of the dressing layer 20 and the adhesive layer 30.
Since the slashes 14 are located between the fixed portions 13, one of the fixed portions 13 (e.g., the fixed portion 131) is able to overlap with the adjacent fixed portion 13 (e.g., the fixed portion 132) such that the carrier 10 presents a three-dimensional structure and the wound dressing 1 can be applied to a non-planar wound. Specifically, the dressing layer 20 is disposed on the central portion 11, and the adhesive layer 30 is disposed on the fixed portions 13. In other words, the dressing layer 20 is coated on the central portion 11 of the carrier 10, and the adhesive layer 30 is coated on the fixed portions 13. In another embodiment, the adhesive layer 30 may be coated on the entire surface of the carrier 10. For example, after the dressing layer 20 is coated on the central portion 11, the adhesive layer 30 is directly coated on a surface which has the dressing layer 20 of the carrier 10, such that the outside surfaces of the fixed portions 13, the spacing portion 12 and the dressing layer 20 are all coated with the adhesive layer 30.
The release paper layer 40 is disposed on the surfaces of the dressing layer 20 and the adhesive layer 30 opposite to the carrier 10. When the wound dressing 1 is not used, the release paper layer 40 is able to prevent the dressing layer 20 from being contaminated and prevent the adhesive layer 30 from adhering to other areas. The release paper layer 40 includes a single or multiple (preferably two) release papers 41. A smooth coating layer (usually an organic silicone resin type release agent) of the release paper 41 adheres to the adhesive layer 30. Further, the area of the release paper layer 40 is greater than or equal to that of the carrier 10. In this embodiment, the release paper layer 40 has two release papers 41, and one of the release papers 41 has a bending portion 411. The bending portion 411 is folded back from the release paper 41 to the surface opposite to the adhesive layer 30 such that bending portion 411 does not adhere to the adhesive layer 30 and the user can easily remove the release paper layer 40. The other one of the release papers 41 also has a bending portion 411, which is overlapped above the folded bending portion 411.
Please refer to
In this embodiment, the dressing layer 20 comprises a hydrogel which can keep the wound (a non-planar wound) in a moist environment to facilitate wound healing. The hydrogel comprises moisturizing ingredients, which may be, but are not limited to, hydroxyethyl methacrylate (2-HEMA), glycerol and polyethylene glycol (PEG). In addition, the hydrogel further comprises pure water and polyvinylpyrrolidones which can form a colloidal structure (or act as a thickening agent). Moreover, the hydrogel can effectively relieve trauma wounds and burns. The signals released by nerve cells in a moist environment are weaker than those released by nerve cells in a dry environment, so the hydrogel can effectively reduce the pain caused by the nerve cells during the wound healing.
Because the spacing portion 12 is disposed on the outside of the central. portion 11, then even if the hydrogel leaks slightly, it will be contained by the spacing portion 12. In other words, the spacing portion 12 can prevent the hydrogel from leaking out of the wound dressing 1 from the non-connected portions (i.e., the slashes 14) between the fixed portions 13. Preferably, the width W of the spacing portion 12 may be between 0.05 cm and 1.5 cm, and more preferably between 0.2 cm and 1 cm, such as 0.5 cm. The width limitation can prevent the leakage of the hydrogel of the dressing layer 20 effectively.
In addition, the adhesive layer 30 may be a pressure sensitive adhesive (PSA), which is easy for the user to adhere and tear off. Preferably, the PSA may be made of low sensitivity materials.
In this embodiment, the number and the size of the fixed portions 13 are limited to a specific range such that the carrier 10 can form a three-dimensional structure, as shown in
As shown in
The second length L2 is the length of each of the slashes 14. When designing the wound dressing 1, the designer can define the first length L1 according to a proper area of each of the fixed portions 13 and then estimate a numerical range of the second length L2 according the limitation that the ratio of the second length L2 to the first length L1 is between 0.2 and 0.8. For example, if the design requirement is that the diameter of the carrier 10 (wound dressing 1) is 12 cm, the first length L1 is 6 cm and the second length L2 is between 1.2 cm and 4.8 cm, preferably between 1.5 cm and 4.2 cm, and more preferably between 2.4 cm and 3.6 cm. The length limitation and the aforementioned number limitation of the fixed portions 13 and the slashes 14 ensure that the area of the adhesive layer 30 on each of the fixed portions 13 is sufficient to stably adhere to the skin and the adjacent fixed portion 13. Preferably, the areas of each of the fixed portions 13 are substantially the same.
Preferably, as shown in
After the dressing layer 20 located on the central portion 11 covers the non-planar wound, the elasticity of the polymer material layer 15 and the elastic fiber layer 16 allows the the user to pull one of the fixed portions 13 outward and then adhere it to the skin with the adhesive layer 30. In addition, after the hydrogel of the adhesive layer 30 absorbs the liquid (e.g., the tissue fluid from the wound) and swells, the polymer material layer 15 and the elastic fiber layer 16 can provide downward pressure (toward the wound) by the elasticity thereof, so the wound will heal flatly and not easily leave a scar.
Please refer to
As above, the wound dressing of the present invention comprises a carrier, a dressing layer, an adhesive layer and a release paper layer. The carrier has a central portion, a plurality of fixed portions and a plurality of slashes. The dressing layer is disposed on the central portion, and the adhesive layer is disposed on the fixed portions. The fixed portions can be overlapped with the adjacent fixed portions such that the carrier presents a three-dimensional structure and the wound dressing can be flatly attached to a non-planar wound (e.g., a wound on a joint, finger, or toe). Further, the number limitation of the fixed portions (between 3 and 20) and the size limitation of the slashes (the ratio of the second length to the first length being between 0.2 and 0.8) ensure that the area of the adhesive layer of each of the fixed portions is sufficient to adhere to the skin and to the adjacent fixed portion firmly for easy dressing.
In addition, the dressing layer has the hydrogel to keep the wound (i.e., the non-planar wound) in a moist environment that is conducive to wound healing and effectively relieve trauma wounds and burns.
It should be noted that the described embodiments are only for illustrative and exemplary purposes and that various changes and modifications may be made to the described embodiments without departing from the scope of the application as disposed by the appended claims.
Number | Date | Country | Kind |
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109133712 | Sep 2020 | TW | national |