CN202113231U - Wound dressing - Google Patents

Abstract

The utility model provides a wound dressing, which comprises a basal layer, a medical pressure-sensitive adhesive layer, a supporting layer and a exudate absorbing layer. Wherein the substrate layer is made of polyurethane; the medical pressure-sensitive adhesive layer is defined with an edge area and a body area; the support layer is made of elastic and malleable materials and is adhered to the body area of the medical pressure-sensitive adhesive layer; the exudate absorbing layer is bonded to the support layer, is in direct contact with the wound, and is composed of hydrogel with high liquid absorbability. The support layer can be made of transparent material; therefore, the wound can be kept moist and wound exudates can be absorbed, and medical care personnel or patients can directly observe the wound healing condition to determine the dressing change time.

Description

wound dressing

technical field

The utility model relates to a wound dressing, in particular to a wound dressing which is malleable, can keep the wound moist and absorb tissue exudate, and is convenient for medical staff or patients to directly observe the wound healing status.

Background technique

There are various kinds of dressings on the market, which can be roughly divided into dry dressings and wet dressings. In the early days, since keeping the wound dry was the main principle of wound care, dry dressings, such as gauze or gauze pads, were mostly used. Later, as the research found that keeping the wound moist can help wound healing, the concept of moist wound healing gradually became popular, and various moist dressings were produced, among which artificial skin is an example.

The aforementioned dry dressing, taking gauze or gauze pad as an example, is usually made of blended or woven cotton, hemp and other materials, or made of non-woven materials. When the aforementioned gauze or gauze pad is used, it is usually directly applied to the wound of the injured patient, and then fixed with an air-permeable adhesive tape; however, when gauze or gauze pad is used, it is easy to stick to the wound. Therefore, when changing the dressing and tearing off the gauze, it often happens that the protective layer formed on the skin or the wound that has gradually healed is torn together, which not only makes the user feel unbearable pain, but is also quite unfavorable for the natural recovery of the wound.

Compared with dry dressings, the aforementioned artificial skin not only does not produce adverse results of sticking to the wound, but also absorbs tissue exudate and creates a moist environment for the wound. However, in use, artificial skin still has the following disadvantages: First, because the artificial skin cannot diffuse the absorbed tissue exudate, it will cause a large amount of exudate to concentrate on the wound, and the wound will be soaked in exudate. Infiltration occurs, causing inflammation and infection. In addition, because the artificial skin is easily decomposed by the bacteria in the infected wound, it will produce peculiar smell; at the same time, the decomposed residue is not easy to be removed; therefore, the artificial skin will not be applicable to the infected wound.

In addition, in addition to the above-mentioned disadvantages, common dry dressings or wet dressings have another common disadvantage, that is, when the above-mentioned dressing is covered with the wound, neither the medical staff nor the patient can observe the healing of the wound without removing the dressing . Therefore, it is usually impossible to determine the dressing replacement time according to the actual healing status of the wound, but the replacement time must be preset by oneself. Since the wound healing situation cannot be grasped in real time, when the wound changes (such as infection), it cannot be dealt with immediately. In addition, in order to avoid the aforementioned disadvantages, the only solution is to shorten the dressing replacement time; however, as the dressing replacement frequency increases, it will not only cause unnecessary waste of dressings in use, but also increase the risk of exogenous infection of the wound.

In view of this, in order to improve the above-mentioned shortcomings, the utility model proposes a wound dressing with ductility and good tissue exudate absorption capacity, which can keep the wound moist and can directly observe the wound healing condition.

Utility model content

The main purpose of the present invention is to provide a wound dressing with a base layer, wherein the base layer is made of polyurethanes, which can effectively prevent moisture from infiltrating, isolate external infection sources, and reduce the occurrence of infection.

Another object of the present invention is to provide a wound dressing with a support layer, wherein the support layer is made of elastic and ductile transparent material;

In this way, not only the flexibility of the wound dressing can be improved, but also the aesthetic effect can be taken into account, or it can be convenient for the medical staff or the patients themselves to directly observe the wound healing status.

Another object of the present invention is to provide a wound dressing with an exudate-absorbing layer, wherein the exudate-absorbing layer is made of hydrogel and has high liquid absorption.

To achieve the above purpose, the utility model provides a wound dressing, which includes a base layer, a medical pressure-sensitive adhesive layer, a supporting layer and an exudate absorbing layer. The aforementioned base layer is made of polyurethanes; the aforementioned medical pressure-sensitive adhesive layer defines an edge area and a body area; the aforementioned support layer is made of elastic and extensible material, and is adhered to the aforementioned medical adhesive layer On the body area; the aforementioned exudate absorbing layer is composed of hydrogel, and combined on the supporting layer, which is in direct contact with the wound.

In practice, the aforementioned support layer is preferably made of polymer elastic cloth fibers or carbon fibers, wherein the aforementioned elastic cloth fibers or carbon fibers are preferably translucent fibers treated with plasma.

In practice, the aforementioned support layer is preferably made of polymer elastic cloth fibers or carbon fibers, wherein the aforementioned elastic cloth fibers or carbon fibers are preferably skin-colored fibers.

In practice, the aforementioned support layer is preferably composed of hydrophilic monomers, wherein the hydrophilic monomers are preferably vinyl, polyalcohol or amide derivatives.

In order to have a deeper understanding of the features and functions of the present utility model, it will be described in detail below with the help of embodiments and accompanying drawings.

The beneficial technical effects of the utility model are as follows: 1. Due to the use of the base layer made of polyurethane with waterproof, transparent and breathable properties, it can effectively isolate external infection sources to reduce the occurrence of infection.

2. Due to the use of the support layer made of elastic and ductile materials, the wound dressing can be more flexible and elastic in use, and can be used in special wound sites such as joints.

3. Due to the use of a skin-colored or transparent support layer, it is convenient for medical staff or patients to directly observe the wound healing status.

4. Due to the use of the exudate absorption layer composed of hydrogel, it can not only effectively absorb the tissue fluid exuded from the wound, but also create a moist environment for the wound.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a wound dressing of the present invention.

Figures 2-4 are diagrams of the use state of the wound dressing of the present invention.

Fig. 5 is another usage state diagram of the wound dressing of the present invention.

[Description of main component symbols]

Wound Dressing 1 Base Layer 10 Medical Pressure Sensitive Adhesive Layer 12

Edge area 122 Body area 124 Support layer 14

Exudate absorbent layer 16

Detailed ways

Please refer to FIG. 1 of the present invention, which is a schematic cross-sectional view showing a preferred embodiment of the wound dressing 1 of the present invention. As shown in the figure, the aforementioned wound dressing 1 structurally includes a base layer 10 , a medical pressure-sensitive adhesive layer 12 , a supporting layer 14 and an exudate absorbing layer 16 .

The aforementioned base layer 10 is made of polyurethane, so it has the characteristics of waterproof, transparent and breathable; thereby, not only can water or bacteria not enter the wound dressing, but also maintain good breathability.

The aforementioned medical pressure-sensitive adhesive layer 12 is made of glue that fixes the skin around the wound and does not cause skin irritation and allergy, and defines a body area 122 and an edge area 124; wherein, the edge area 124 is used as a The self-adhesive side allows the wound dressing 1 to be pasted on the user's skin. Since the adhesive used in the medical pressure-sensitive adhesive layer 12 not only does not leave any adhesive residue, but also has good adhesion to fix the skin around the wound, it will not cause skin irritation and allergies after application.

The support layer 14 is pasted on the main body area 122 of the medical pressure-sensitive adhesive layer 12 and is made of elastic and extensible material, such as polymer elastic cloth fiber or carbon fiber. Due to its elasticity and extensibility, it can not only be used as a support structure, but also can endow the overall wound dressing with good elasticity and extensibility, and can be applied to specific wounds with angles (such as joints).

If the above-mentioned polymer elastic cloth fiber or carbon fiber is treated with plasma first, it can be made translucent, and after adding the exudate absorbing layer 16 hydrogel, a completely transparent wound dressing can be presented, which is convenient for medical staff. Or the patient's own observation of the state of wound healing. In addition, the above-mentioned polymer elastic fabric fibers or carbon fibers can also be colored with skin color to match the skin color of the patient; thus, when in use, the wound dressing applied to the wound is similar in color to the adjacent skin, and an aesthetic effect can be achieved .

In practice, the above-mentioned polymer elastic cloth fibers can be woven, non-woven, knitted or water-woven fibers; wherein, the above-mentioned non-woven fibers can be made of polyvinyl chloride, polyethylene, ethylene vinyl acetate copolymer Fibers made of Ethylene VinylAcetate copolymer, Polyvinyl alcohol or Polyurethane. In addition, the carbon content of the aforementioned carbon fibers is preferably above 90%, in order to obtain better structural strength.

The aforementioned exudate absorbing layer 16 is in direct contact with the wound for absorbing tissue fluid exuded from the wound. In this embodiment, the aforementioned exudate absorbing layer 16 is combined on the supporting layer 14 and is composed of hydrogel. The aforementioned hydrogel is a cross-linked polymer hydrogel prepared by cross-linking polymerization, and its components are hydrophilic hydrogels composed of hydrophilic monomers, such as vinyls, polyalcohols or amides Derivatives; wherein the aforementioned alkene, polyalcohol or amide derivatives are, for example, N-vinylpyrrolidone (N-ethyl pyrrolidone), polyethylene glycol (Polyethylene glycol) and the like. In addition, the above-mentioned hydrophilic monomers can present a transparent hydrogel after the polymerization process.

When the above-mentioned hydrophilic monomers are used, the formed hydrogel has an excellent tissue fluid absorption effect and can maintain a moist wound healing environment. If the wound is healed in a humid environment, it can not only increase the speed of epithelial cell migration and proliferation, and accelerate wound healing; it can also prevent the dehydration of the nerve receptor by keeping the peripheral nerve in an infiltrated environment, so as to achieve the effect of alleviating wound pain.

In addition, after absorbing the interstitial fluid exuded from the wound, as shown in FIGS. 2 to 4 , the overall wound dressing will be in a transparent state, so that the healing condition of the wound covered by the wound dressing can be directly seen through.

The main disadvantage of traditional dressings is their opacity, so it is impossible to directly inspect the wound healing status, and it is also impossible to decide when to change the dressing according to the actual healing status of the wound. Therefore, it is often the case that the wound changes without knowing it.

However, as shown in Fig. 4, after absorbing the tissue exudate, the wound dressing of the present invention is in a transparent state; by this, no matter for the medical staff or the patients themselves, they can directly observe the wound under the wound dressing 1 through naked eyes. status. Therefore, when the wound is found to be healed poorly or infected, it can be treated immediately to avoid possible wound deterioration; when the wound is found to have healed, the wound dressing 1 can be removed immediately.

In addition, it can be seen from the above that the support layer can provide good elasticity and extensibility of the wound dressing, and the medical pressure-sensitive adhesive layer has a good fixing effect; therefore, when these two characteristics are combined, it can be used in large areas and joints the wound.

As shown in Figure 5, when the wound area is large, it is naturally impossible to use a single piece of wound dressing to cover it; if the traditional wound dressing is used in combination, it is limited by its lack of elasticity and ductility, and its rubber edge will stick to the wound , so it is extremely inconvenient to use. Compared with this, the wound dressing of the present invention has no such concerns, and can be used in large-area wounds in any combination.

Therefore, the utility model has the following advantages:

1. Due to the base layer made of polyurethane with waterproof, transparent and breathable properties, it can effectively isolate the source of external infection and reduce the occurrence of infection.

2. Due to the use of the support layer made of elastic and ductile materials, the wound dressing can be more flexible and elastic in use, and can be used in special wound sites such as joints.

3. Due to the use of a skin-colored or transparent support layer, a better aesthetic effect can be obtained, or it is convenient for medical staff or patients to directly observe the wound healing status.

4. Due to the use of the exudate absorption layer composed of hydrogel, it can not only effectively absorb the tissue fluid exuded from the wound, but also create a moist environment for the wound.

To sum up, the utility model can indeed achieve the expected purpose, providing a kind of ductility, which can keep the wound moist and absorb tissue exudate, and can be transparent or skin-colored, so as to take into account the aesthetic effect, or facilitate medical staff Or wound dressings that allow direct observation of wound healing by the patient himself.

The above description and drawings are only used to illustrate the embodiments of the present utility model, and those skilled in the art can still make equivalent partial changes and modifications, which do not deviate from the technology and spirit of the present utility model.

Claims (11)

1. wound dressing, its characteristic comprises:

A basal layer, made by polyurethane;

A medical pressure sensing adhesive layer, it defines a marginal area and a body regions;

A supporting layer is processed by the material of tool elasticity, ductility, and is adhered on the body regions of aforementioned medical pressure sensing adhesive layer; And

A transudate absorbed layer is made up of hydrogel, and is incorporated on this supporting layer, and it directly contacts with wound.

2. wound dressing as claimed in claim 1 is characterized in that: this hydrogel is the cross-linked polymeric hydrogel.

3. wound dressing as claimed in claim 1 is characterized in that: this hydrogel is a hydrophilic hydrogel.

4. wound dressing as claimed in claim 3 is characterized in that: this hydrophilic monomer is alkene class, polyalcohols or amide derivatives.

5. wound dressing as claimed in claim 3 is characterized in that: this hydrophilic monomer is N-vinylpyrrolidone or Polyethylene Glycol.

6. wound dressing as claimed in claim 1 is characterized in that: this supporting layer is made by high polymer elastic fabric fibre or carbon fiber.

7. wound dressing as claimed in claim 6 is characterized in that: this high polymer elastic fabric fibre or carbon fiber are for handling the translucent fiber that forms through the electricity slurry.

8. like wound dressing as claimed in claim 6, it is characterized in that: this high polymer elastic fabric fibre or carbon fiber are the fiber that is skin-color.

9. like claim 7 or 8 described wound dressings, it is characterized in that: this high polymer elastic fabric fibre for weave cotton cloth, adhesive-bonded fabric, looped fabric or water are weaved cotton cloth fiber.

10. wound dressing as claimed in claim 9 is characterized in that: this adhesive-bonded fabric fiber is polrvinyl chloride, polyethylene, ethylene vinyl acetate copolymer, polyvinyl alcohol or Polyurethane fiber.

11. wound dressing as claimed in claim 6 is characterized in that: this carbon fiber is that phosphorus content is the carbon fiber more than 90%.

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