TWM525747U - Trauma dressing structure - Google Patents

Description

Wound dressing structure

The present invention relates to a wound dressing structure, and more particularly to a wound dressing structure having an integrally formed contact layer and absorbent layer.

Typically, the dressing is designed to be a dressing that is ideal for maintaining a proper moist environment, avoiding interference with growth, preventing the development of scar tissue, sticking to the wound, and preventing wound infiltration. Especially in the process of wound healing, it needs to be kept in a humid environment, so that fibroblasts can move quickly to accelerate microangiogenesis, and the tissue fluid continuously exuding from the wound of the skin contains a large amount of collagen and growth factors, which can promote The growth of the cells accelerates the healing of the wound. Therefore, when the dressing has the above characteristics, it is not necessary to change the dressing frequently, and the wound can be infected by the external bacteria in an environment of being kept closed, moist, and breathable, and can also achieve the effect of self-debridement. The healing of the wound is better.

However, the most common methods of wound treatment are natural healing, the use of gauze or cotton pads, etc. These methods are easy to dry the wound surface due to the contact of the wound with the wound, so that the fibroblast can not move and the amount of exudate is reduced, thus not only delaying the wound Healed and prone to scarring. In addition, when gauze or cotton pad is used, the healed tissue is often torn apart by replacement, which is very unfavorable for wound healing. Therefore, in order to keep the wound in a humid environment, wound dressings such as artificial skin and foam are developed. Although the artificial skin has better moisturizing properties, the wound is continuously soaked in the tissue fluid due to poor water absorption, causing infiltration, and even if the foam has better water absorption and can maintain a wet environment, it has a pore size. Large and easy to stick to the problem of the wound. In recent years, wound dressings such as foam combination silicone have been developed, and since the silicone oil absorbs water, the wound cannot be breathable, and it cannot be an ideal wound dressing. Therefore, none of the above dressings can have the characteristics of all ideal dressings and must be replaced frequently, thereby increasing the risk of the wound being infected by bacteria or viruses, and easily delaying the healing of the wound.

As mentioned above, the author of this creation thinks about and designs a wound dressing structure to improve the lack of the existing dressing structure, thereby enhancing the implementation and utilization of the industry.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a wound dressing structure to solve the problem that the dressing structure of the prior art cannot combine the functions of water absorption, moisture retention, gas permeability and non-stick wound. The problem of dressing must be changed frequently.

According to the purpose of the present invention, a wound dressing structure is provided, comprising: a contact layer having a plurality of first holes, wherein the plurality of first holes are discontinuous closed holes; and an absorbing layer disposed on one side of the contact layer And having a plurality of second holes. Wherein, the contact layer and the absorbing layer are integrally formed and made of polyurethane, and the pore diameter of the plurality of first holes is smaller than the pore diameter of the plurality of second holes.

Preferably, the thickness of the contact layer may be from 90 to 130 μm.

Preferably, the thickness of the absorbing layer may be 5 to 10 mm.

Preferably, the plurality of first holes may have a diameter of 40 to 140 μm.

Preferably, the plurality of second holes may have a diameter of 100 to 1000 μm.

Preferably, the wound dressing structure may further comprise a gas permeable layer disposed to cover the absorbent layer and to have a viscosity on one side facing the absorbent layer, and is made of polyurethane.

Preferably, the gas permeable layer has a thickness of 0.02 to 0.1 mm.

Preferably, the polyurethane may be a hydrophilic polyurethane or a hydrophilic polyurethane foam.

Preferably, the gas permeable layer may have an area larger than the contact layer and the absorbing layer.

Preferably, the wound dressing structure may further comprise a release paper disposed on the other side of the contact layer, and the release paper has an area greater than or equal to the gas permeable layer.

Preferably, the release paper may further comprise a first release liner and a second release liner, and the first release liner and the second release liner are disposed to cover the breathable layer and have an overlapping position across the breathable layer.

Preferably, the wound dressing structure may further comprise a plastic film corresponding to the area of the release paper having an area larger than the gas permeable layer, and sealing the plastic film and the release paper in a manner of clamping the wound dressing structure.

As described above, the wound dressing structure created herein can have one or more of the following advantages:

(1) The wound dressing structure of the present invention is a discontinuous closed hole by a plurality of first holes in the contact layer and the material has the characteristics of anti-protein and cell attachment, so that the cells do not enter the contact layer when the cells proliferate. This can prevent the adhesion of the wound.

(2) The wound dressing structure of the present invention has good water absorption by a plurality of second holes in the absorbent layer, thereby absorbing the tissue fluid exuded by the wound, thereby avoiding cell infiltration and keeping the wound in an appropriate state. Wet environment.

(3) The wound dressing structure of the present invention absorbs the tissue fluid by the absorption layer composed of hydrophilic polyurethane and cooperates with a plurality of second holes to expand and deform the absorbent layer to conform to the wound, thereby inhibiting the healing of the fibroblast to the wound center. Shrinkage, while having the characteristics of preventing scarring.

(4) The wound dressing structure of the present invention can extend the time of dressing replacement by the overall structure and the materials formed by the combination, not only reducing the risk of bacterial infection of the wound, but also avoiding the process of disturbing the wound healing to promote wound healing. speed.

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved by the examiner, the author will use the drawings in detail and explain the following in the form of the examples, and the drawings used therein The subject matter is only for the purpose of illustration and supplementary explanation. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

The embodiments of the wound dressing structure 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.

Please refer to FIG. 1 and FIG. 2A to FIG. 2D together. FIG. 1 is a cross-sectional view of the wound dressing structure of the present invention, and FIG. 2A is an electron microscope image of the contact layer 100 of the wound dressing structure of the present invention. 2B is an electron microscope image of the absorbent layer 200 of the wound dressing structure of the present invention, and FIG. 2C is an electron microscope image of the contact layer 100 and the absorbent layer 200 of the wound dressing structure of the present invention, and 2D. The figure is an electron microscope image of the breathable layer 300 of the created wound dressing structure. As shown in FIG. 1, the wound dressing structure 10 of the present invention comprises a contact layer 100, an absorbing layer 200, and a gas permeable layer 300. The contact layer 100 and the absorption layer 200 may be formed of a polyurethane, the polyurethane may be a hydrophilic polyurethane or a hydrophilic polyurethane foam, and preferably the hydrophilic polyurethane is extended by reacting poly(propylene glycol) triol with a polyisocyanate. After the star-shaped prepolymer, the star-shaped block polyurethane obtained by crosslinking reaction with polyethylene glycol (PEG) and hyaluronic acid. As shown in FIGS. 1 and 2A, the contact layer 100 has a plurality of first holes 101, and the thickness of the contact layer may be 90 to 130 μm, preferably 90 to 100 μm. The first hole 101 is sized to form a discontinuous closed hole and is smaller than the size of the cell, and may have a diameter of 40 to 140 μm, preferably 40 to 60 μm, and is in contact with the wound W because the hole is formed into a closed shape. The contact layer 100 has no holes on its surface, and the new tissue cannot grow into the contact layer 100. Further, since the contact layer 100 can be formed of a hydrophilic polyurethane or a hydrophilic polyurethane foam obtained by crosslinking reaction with polyethylene glycol, the polyethylene glycol has anti-protein and cell adhesion characteristics, and can be further improved. The new tissue that prevents the wound W grows into the contact layer 100, which increases the user's comfort and shortens the wound healing time. Next, as shown in FIGS. 1 and 2B, the absorbing layer 200 may be disposed on one side of the contact layer 100, and the absorbing layer 200 may have a thickness of 5 to 10 mm, preferably 5 to 6 mm. The plurality of second holes 201 having a larger diameter than the plurality of first holes 101 in the absorption layer 200 may have a diameter of 100 to 1000 μm, preferably 400 to 800 μm, to absorb a large amount of tissue fluid while making the wound W It is better to maintain the size and thickness of the pores in a proper moist environment without causing wound infiltration, and to prevent tissue dehydration and cell death in the wound W by maintaining a proper moist environment, and to accelerate the movement of the fibroblasts to promote blood vessels. Generate and increase the rate at which dead tissue and fibrin are broken down. Further, the second layer 201 is formed by the absorption layer 200 formed of a hydrophilic polyurethane or a hydrophilic polyurethane foam copolymerized with polyethylene glycol (PEG), which can be expanded and deformed after absorbing the tissue fluid to adhere to the wound W and the skin S. Therefore, the fibroblast is inhibited from contracting to the W center of the wound when it is healed, thereby preventing the occurrence of scars. As shown in FIG. 1 and FIG. 2C, the contact layer 100 and the absorbing layer 200 may be integrally formed, and the shape thereof may be square or circular, but not limited thereto, and may be cut according to the size of the wound W. Appropriate size and shape make it easy to attach to wound W of various shape surfaces.

Referring to FIGS. 1 and 2D, the gas permeable layer 300 is disposed to cover the absorbing layer 200, and the gas permeable layer 300 may have a thickness of 0.02 to 0.1 mm, preferably 0.02 to 0.03 mm, and may be composed of, for example, polydiethanol. The hydrophilic end and the other end are formed of a polyurethane having a hydrophobic end, but are not limited thereto. By virtue of the mutually repellent nature of the hydrophilic end and the other hydrophobic end, the gas permeable layer 300 is made to generate pores through which the gas can pass, and thus has high gas permeability to the wound W. However, since the pore size is smaller than that of the water molecules, the water molecules cannot enter the gas permeable layer 300, and further achieve the effect of waterproofing and inhibiting the growth of microorganisms to avoid exogenous infection. In addition, the gas permeable layer 300 is viscous on one surface facing the absorbing layer 200, and can be applied to the gas permeable layer 300 by using a medical grade glue. The medical grade adhesive can be, for example, a silicone rubber or an acrylic rubber. Gum which is hypoallergenic, has no residual glue, and has good adhesion is preferred. The adhesiveness on the gas permeable layer 300 can be adhered to the wound dressing structure 10, but the manner in which the wound dressing structure 10 is attached to the gas permeable layer 300 is not limited thereto, and may be formed, for example, integrally with the absorbent layer 200.

The wound dressing structure 10 of the present invention is a material formed by a hydrophilic polyurethane or a hydrophilic polyurethane foam combined with the overall structure thereof, and the time for changing the dressing can be prolonged, according to which the structure 10 can be continuously used for 7 to 14 days. No need to change the dressing, but keep the wound in a proper moist environment without causing wound infiltration, and has skin-like breathability, not only reducing the risk of wound infection, but also avoiding the process of disturbing wound healing. It is beneficial to the growth of collagen and growth factors in tissue fluids, and promotes the rapid migration of fibroblasts to accelerate microvascular formation and accelerate wound healing.

Please refer to FIG. 1 and FIG. 3 together. FIG. 3 is a cross-sectional view showing the first embodiment of the wound dressing structure of the present invention. In the present example, the structure and configuration relationship of each component are similar to the foregoing, and the similarities are not described herein. The main difference between this embodiment and the wound dressing structure described above is that the gas permeable layer 300 has an area larger than the contact layer 100 and the absorbent layer 200, and further includes the release paper 400.

In the present embodiment, since the gas permeable layer 300 has an area larger than that of the contact layer 100 and the absorbing layer 200, when the wound dressing structure 10 is adhered to the gas permeable layer 300, the edge of the structure 10 and the edge of the gas permeable layer 300 are preliminarily It is preferred to leave a predetermined distance so that when the wound dressing structure 10 is adhered to the skin S, the structure 10 can be sealed between the gas permeable layer 300 and the skin S, so that the wound W maintains a closed environment and avoids bacteria. Or the virus enters from outside.

In addition, the release paper 400 may be disposed on the other side of the contact layer 100, and the release paper 400 has an area equal to that of the gas permeable layer 300. The release paper 400 may be a polyester film (PET) or a double shaft on the side facing the gas permeable layer 300. The polypropylene film (OPP) or the polyethylene film (PE) is stretched so that the gas permeable layer 300 is attached to the release paper 400. When the user wants to use the wound dressing structure 10, it is only necessary to peel off the release paper 400, and the contact layer 100 corresponds to the position of the wound W, and the portion reserved by the gas permeable layer 300 is adhered to the skin S, so the wound dressing When the structure 10 is adhered to the skin S, the wound W is in contact with the contact layer 100, and the absorbent layer 200 and the gas permeable layer 300 are sequentially in order from the contact layer 100. ,

Please refer to Fig. 4, which is a cross-sectional view showing a second embodiment of the wound dressing structure of the present invention. The main difference between this embodiment and the previous embodiment is that the release paper 400 further includes a first release liner 401 and a second release liner 402, and the first release liner 401 and the second release liner 402 have overlapping positions that overlap each other.

In the present embodiment, the release paper 400 includes a first release liner 401 and a second release liner 402 with overlapping locations across the breathable layer 300. The area of the first release paper 401 and the second release paper 402 after overlapping corresponds to the area of the gas permeable layer 300 to completely cover the gas permeable layer 300, but is not limited thereto, and may be set larger than the area of the gas permeable layer 300. And in the overlapping position, the first release paper 401 is overlapped on the second release paper 402, and the first release paper 401 has a folded portion on one end of the overlapping position, but is not limited thereto. When the user attaches the wound dressing structure 10 to the wound, the release paper 400 can be simply peeled off and the finger is prevented from coming into contact with the contact layer 100 to achieve a convenient operation.

Please refer to Fig. 5, which is a cross-sectional view showing a third embodiment of the wound dressing structure of the present invention. As shown, the main difference between this embodiment and the above embodiment is that the area of the release paper 400 is larger than that of the gas permeable layer 300, and the wound dressing structure 10 further comprises a plastic film 500.

In the present embodiment, when the gas permeable layer 300 is attached to the release paper 400, a predetermined distance may be reserved between the edge of the gas permeable layer 300 and the edge of the release paper 400, and by the area corresponding to the area of the release paper 400. The plastic film 500 encloses the wound dressing structure 10. When the package is packaged, the wound dressing structure 10 is sealed and sterilized in a manner of being sandwiched between the release paper 400 and the plastic film 500, whereby the wound dressing structure 10 can be stored in a sterile environment for the user. Can be used in a safe state.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of this creation shall be included in the scope of the appended patent application.

10‧‧‧ wound dressing structure
100‧‧‧Contact layer
101‧‧‧ first hole
200‧‧‧absorbing layer
201‧‧‧Second hole
300‧‧‧ breathable layer
400‧‧‧ release paper
401‧‧‧First release paper
402‧‧‧Second release paper
500‧‧‧ plastic film
S‧‧‧ skin
W‧‧‧Wound

Figure 1 is a cross-sectional view of the wound dressing structure of the present invention.

Fig. 2A to Fig. 2D are electron microscope images of the wound dressing structure of the present invention.

Figure 3 is a cross-sectional view of a first embodiment of the wound dressing structure of the present invention.

Figure 4 is a cross-sectional view of a second embodiment of the wound dressing structure of the present invention.

Figure 5 is a cross-sectional view of a third embodiment of the wound dressing structure of the present invention.

10‧‧‧ wound dressing structure

100‧‧‧Contact layer

101‧‧‧ first hole

200‧‧‧absorbing layer

201‧‧‧Second hole

300‧‧‧ breathable layer

S‧‧‧ skin

W‧‧‧Wound

Claims (12)

A wound dressing structure comprising: a contact layer having a plurality of first holes therein, the plurality of first holes being discontinuous closed holes; and an absorbing layer disposed on one side of the contact layer And the plurality of second holes are formed in the absorbing layer, wherein the contact layer and the absorbing layer are integrally formed and made of polyurethane, and the plurality of first holes have a smaller pore diameter than the plurality of second holes The pore size of the hole. The wound dressing structure of claim 1, wherein the contact layer has a thickness of 90 to 130 μm. The wound dressing structure of claim 1, wherein the absorbent layer has a thickness of 5 to 10 mm. The wound dressing structure of claim 1, wherein the plurality of first holes have a diameter of 40 to 140 μm. The wound dressing structure of claim 4, wherein the plurality of second holes have a diameter of 100 to 1000 μm. The wound dressing structure of claim 1, further comprising a gas permeable layer having water repellency or antibacterial property, and disposed to cover the absorbing layer and having a viscosity on a side facing the absorbing layer, It is made of polyurethane. The wound dressing structure of claim 6, wherein the gas permeable layer has a thickness of 0.02 to 0.1 mm. The wound dressing structure according to claim 1 or 6, wherein the polyurethane is a hydrophilic polyurethane or a hydrophilic polyurethane foam. The wound dressing structure of claim 6, wherein the gas permeable layer has an area larger than the contact layer and the absorbent layer. The wound dressing structure of claim 6, further comprising a release paper disposed on the other side of the contact layer, the release paper having an area greater than or equal to the gas permeable layer. The wound dressing structure of claim 10, wherein the release paper further comprises a first release paper and a second release paper, and the first release paper and the second release paper are disposed to cover the gas permeable layer. And having an overlapping position across the gas permeable layer. The wound dressing structure of claim 10, further comprising a plastic film corresponding to an area of the release paper having an area larger than the gas permeable layer, and in a manner of clamping the wound dressing structure The plastic film is sealed with the release paper.