CN215459320U - Combined hydrogel dressing for wound healing - Google Patents

Abstract

The application relates to the technical field of medical dressings, and provides a combined hydrogel dressing for wound healing, which comprises a fixing component, a first functional component and a second functional component, wherein the fixing component is provided with a hollow closed cross section, takes the surface far away from the skin as the upper part, and comprises a waterproof isolation layer, a fixed adsorption layer and an adhesive layer which are sequentially compounded from top to bottom; the first functional component is used at the initial stage of wound healing and comprises an adsorption layer, a first connecting layer and a hemostasis gel layer which are sequentially compounded from top to bottom; the second functional component is used in the later period of wound healing and comprises a supporting layer, a second connecting layer and a hydrogel layer which are sequentially compounded from top to bottom; the first functional assembly and the second functional assembly are detachably used in the hollow part of the fixing assembly respectively and are connected through the first connecting layer and the second connecting layer. The combined hydrogel dressing is suitable for the whole healing period, can avoid repeatedly uncovering the secondary damage to the skin caused by the dressing, and is low in use cost.

Description

Combined hydrogel dressing for wound healing

Technical Field

The application belongs to the technical field of medical dressings, and particularly relates to a combined hydrogel dressing for wound healing.

Background

The wound dressing is characterized in that the wound dressing is a wound dressing for wound care, and is mainly characterized in that the wound dressing is a pressure-sensitive adhesive layer, and the wound dressing is a wound dressing for short. Since a certain time is required for wound healing, the dressing needs to be replaced in a wound healing cycle, and the dressing needs to be completely removed when being replaced so as to replace the new wound dressing. However, the dressing is repeatedly torn off, so that certain mechanical damage can be caused to the skin, and the risk of secondary damage is higher for people with fragile skin such as children and the old.

Chinese patent document No. CN 209984437U discloses a combined dressing, which includes a central dressing and a peripheral dressing, wherein a window for embedding the central dressing is provided at the center of the peripheral dressing. In the using process, the peripheral dressing of the combined dressing is reserved, and the central dressing is replaced, so that secondary damage to the wound surface is avoided, but the central dressing is difficult to meet the requirements of the wound in all healing periods. The requirements for the dressing are different in different wound healing periods, bleeding and exudation are often accompanied in the early wound healing period, pain, inflammation and the like are also accompanied, the infection is easy, and timely hemostasis, seepage absorption, pain alleviation and infection risk reduction are needed. In the later period of wound healing, scars are easily formed, a proper wet environment is needed to promote the wound healing, the smooth surface is convenient for the smooth growth of granulation tissues, and the risk of forming scars is reduced due to hydration.

Chinese patent publication No. CN 212547387U discloses a combined dressing capable of reducing the number of times of replacement, which is mainly composed of a wound dressing main body and a exudate absorbing main body, which is combined with the wound dressing main body on the side opposite to the wound in a state of absorbing exudate from the wound and absorbs the exudate from the wound dressing main body, and which is also independently separable from the wound dressing main body and replaceable. The combined dressing comprises a wound application main body and a seepage absorption main body, the times of dressing replacement can be reduced, the effects of timely absorbing seepage and replacing the seepage absorption main body are achieved, but a wound opening contact layer in the wound application main body is in long-term contact with a wound in the use process of the application main body, the wound opening contact layer is easy to pollute, and wound healing is not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides a combined hydrogel dressing for wound healing, which is suitable for the whole healing cycle, and can avoid the secondary damage to the skin caused by repeatedly removing the dressing, and has a lower use cost.

The application provides a combined hydrogel dressing for wound healing, which comprises a fixing component, a first functional component and a second functional component, wherein the fixing component is provided with a hollow closed cross section, takes the surface far away from the skin as the upper part, and comprises a waterproof isolation layer, a fixed adsorption layer and an adhesive layer which are sequentially compounded from top to bottom;

the first functional component is used at the initial stage of wound healing and comprises an adsorption layer, a first connecting layer and a hemostasis gel layer which are sequentially compounded from top to bottom;

the second functional component is used in the later period of wound healing and comprises a supporting layer, a second connecting layer and a hydrogel layer which are sequentially compounded from top to bottom;

the first functional component and the second functional component are detachably used in the hollow part of the fixing component respectively and are connected through the first connecting layer and the second connecting layer when in use.

Preferably, the waterproof isolating layer in the fixing component is a breathable elastic polymer material layer, and is compounded with the non-full surface of the fixing adsorption layer through hot melt adhesive; the fixing component is preferably of a square-shaped or annular cross section, wherein the waterproof isolating layer covers the fixing adsorption layer and the sticking layer.

Preferably, fixed adsorbed layer is the cotton layer of bubble or the cotton layer of acupuncture among the fixed subassembly, the shape of fixed adsorbed layer is preferred to be the same with waterproof isolation layer, and the external diameter is less than more than 2mm of waterproof isolation layer, and the internal diameter is greater than more than 2mm of waterproof isolation layer.

Preferably, the adhesive layer in the fixing component is compounded with the fixing and adsorbing layer in an intermittent adhesive coating mode; preferably, the waterproof isolating layer is compounded with the side, facing the skin, of the waterproof isolating layer in a full coating mode with the width of 2mm-5 mm.

Preferably, the first functional component stops the blood coagulation glue layer and is formed by alternately coating chitosan raw material and hydrogel on the adsorption layer of the first functional component.

Preferably, the first functional component stops the hemagglutination glue layer and leaves a plurality of drainage channels with the width of 1mm-3 mm.

Preferably, the support layer in the second functional component is a non-woven fabric layer, and the area of the support layer is larger than that of the hollow part of the fixing component.

Preferably, the total thickness of the first functional component or the second functional component is not less than the total thickness of the fixing component, so that the hemostatic gel layer or the hydrogel layer is in contact with the wound when in use.

Preferably, the first functional component and the second functional component each independently further include a waterproof layer compounded on the uppermost layer.

Preferably, the fixing component, the first functional component and the second functional component each independently further comprise a protective layer compounded on the lowermost layer.

The combined hydrogel dressing for wound healing described herein consists essentially of three parts: the fixing component is provided with a hollow closed section, and the first functional component and the second functional component which are used at different periods and can be detachably combined; the fixing component is adhered around the skin wound, is fixed once and used repeatedly, and is not easy to pollute; in the initial stage of wound healing, the first functional component is connected with the fixing component in a combined manner, the hemostatic gel layer plays roles of cold compress cooling, hemostasis and pain relief, and the adsorption layer adsorbs exudation; and in the later stage of wound healing, the second functional component is connected with the fixed component in a combined manner, and a wet environment is provided for wound healing, a flat surface is provided for granulation tissue growth and the like through the supporting layer and the hydrogel layer. By adopting the combined hydrogel dressing provided by the application, the fixing component only needs to be fixed and uncovered for 1 time in the whole wound healing process, the mechanical damage to the skin in the multiple uncovering process is reduced, and the use cost is reduced; and aiming at different healing periods, proper functional component dressing is selected, so that the wound healing is promoted, and the wound healing quality is improved.

Drawings

FIG. 1 is a schematic view of a combination of a fixing element and a first functional element according to some embodiments of the present disclosure;

FIG. 2 is a cross-sectional view of a fixation assembly according to some embodiments of the present application;

FIG. 3 is a cross-sectional view of a first functional component of some embodiments of the present application;

FIG. 4 is a cross-sectional view of a second functional assembly of some embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The application provides a combined hydrogel dressing for wound healing, which comprises a fixing component, a first functional component and a second functional component, wherein the fixing component is provided with a hollow closed-shaped cross section, takes the surface far away from the skin as the upper part, and comprises a waterproof isolation layer, a fixed adsorption layer and an adhesive layer which are sequentially compounded from top to bottom;

the first functional component is used at the initial stage of wound healing and comprises an adsorption layer, a first connecting layer and a hemostasis gel layer which are sequentially compounded from top to bottom;

the second functional component is used in the later period of wound healing and comprises a supporting layer, a second connecting layer and a hydrogel layer which are sequentially compounded from top to bottom;

the first functional component and the second functional component are detachably used in the hollow part of the fixing component respectively and are connected through the first connecting layer and the second connecting layer when in use.

The hydrogel dressing provided by the application is of a combined structure, is suitable for the whole period of wound healing, can avoid repeatedly uncovering the secondary damage of the dressing to the skin, and is low in use cost.

The combined hydrogel dressing for wound healing of the embodiment of the application is composed of a fixing component, a first functional component and a second functional component; the first functional component and the second functional component are connected with the fixing component when in use, and the functional components can be detached and replaced at any time. In the combined hydrogel dressing, the fixing component and the first functional component are used in a disassembling and combining mode, the first functional component is selected at the initial stage of wound healing, and the effects of stopping bleeding, absorbing and permeating, and cold compressing and relieving pain can be achieved.

Referring to fig. 1 to 3, fig. 1 is a combination schematic view of a fixing component and a first functional component in some embodiments of the present application, fig. 2 is a sectional view of the fixing component, and fig. 3 is a sectional view of the first functional component. Wherein, 1-1 is a waterproof isolation layer of the fixed component, 1-2 is a fixed adsorption layer of the fixed component, 1-3 is an adhesive layer of the fixed component, 1-4 is a protective layer of the fixed component, and 1-5 is a ventilation channel; 2-1 is a waterproof layer of the first functional component, 2-2 is an adsorption layer of the first functional component, 2-3 is a hydrogel layer of the first functional component, 2-4 is a protective layer of the first functional component, 2-5 is a first connecting layer, 2-6 is a drainage channel, and 2-7 is a hemostatic layer.

In order to keep away from the skin surface for last, this application embodiment fixed subassembly from top to bottom is in proper order: waterproof isolation layer 1-1, fixed adsorption layer 1-2, adhesive layer 1-3 and protective layer 1-4. The fixing component has a hollow closed-shaped cross section, namely, a through hole is arranged in the middle of the fixing component, the periphery of the through hole is adhered to the surface of the skin, and the combined functional component is contacted with the wound at the hollow position. The fixing component can be in a regular or irregular hollow closed shape, and is preferably in a closed multilayer structure in a shape like a Chinese character 'hui' (rectangular, square and any other contour), or in a ring shape (including circular rings and elliptical rings).

In the fixing component, the waterproof isolating layer 1-1 can be a breathable elastic polymer material layer, and preferably has the air permeability of 500g/m²And the high-permeability and high-elasticity polymer microporous layer such as common Polyurethane (PU), Thermoplastic Polyurethane (TPU), Thermoplastic Polyester Elastomer (TPE) and the like with more than 24h does not need to be provided with specific requirements on porosity and pore diameter thickness, and the PU/TPU/TPE film is adopted. The waterproof isolating layer 1-1 can be compounded with the fixed adsorption layer 1-2 in a discontinuous form of a dotted non-full surface through hot melt adhesive; as shown in figure 1, the waterproof isolation layer 1-1 is a rectangular outer contour of the fixed component, the outer edge of the waterproof isolation layer is larger than the edge of the fixed adsorption layer, namely the waterproof isolation layer can cover the fixed adsorption layer and the sticking layer, and the fixed component is prevented from being polluted by more seepage liquid at the initial stage of wound healing.

In the fixing component, the fixing and absorbing layer 1-2 can be a material sheet layer with a water absorbing function, such as a foam layer, a needle-punched cotton layer and the like, and the thickness of the fixing and absorbing layer is not more than 3 mm. The shape of fixed adsorbed layer is preferred the same with waterproof isolation layer, and the external diameter is less than waterproof isolation layer more than 2mm, and the internal diameter is greater than waterproof isolation layer more than 2mm, can effectively adsorb and paste position sweat, prevents that sweat from causing to paste insecurely.

In the fixing component, the adhesive layers 1-3 play a fixing role, can be viscose, can be medical pressure-sensitive adhesive, self-adhesive silicone gel or high-viscosity hydrogel, and the fixing component is fixed on intact skin around the wound through the adhesive layers. In the preferred embodiment of the application, the viscose is compounded with the fixed adsorption layer 1-2 in a discontinuous gluing mode such as spot coating, and a plurality of ventilation channels 1-5 can be formed, namely, the ventilation channels reserved on the fixed adsorption layer increase the ventilation property of the pasting part and improve the comfort; the sweat is absorbed by the fixed absorption layer through the absorption pore channel to keep the surface of the skin dry, so that the adhesion effect and the comfort are improved. In addition, the viscose is preferably compounded with the adsorption layer in a full-coating mode with the width of 2mm-5mm and compounded with the waterproof isolation layer in a full-coating mode with the inner diameter not less than 2mm, so that the fixing component is completely attached to the skin within the inner diameter range of the fixing component to prevent wound seepage from polluting the fixing component; the width of the pasting layer is not less than 15mm to ensure firm pasting.

The fixing assembly of the preferred embodiment of the present application further comprises: and protective layers 1-4 compounded on the lowermost layer, as shown in fig. 2. The protective layers 1-4 in the fixing component are usually films with release effect or waterproof paper with release effect, and can be set to be in the form of half-broken, folded or larger than a waterproof isolating layer in size, so that the protective layers can be removed conveniently in use.

In different periods of wound healing, different functional hydrogel dressings are selected for combined use, the pertinence is stronger, and the wound healing is facilitated. Wherein the first functional component is used for the initial period of wound healing and has a multilayer structure. On the skin surface of keeping away from is, this application embodiment first functional component from top to bottom is in proper order: a waterproof layer 2-1 (not shown in fig. 1), an absorption layer 2-2, a first connecting layer (2-5), a hemostatic layer 2-7, a hydrogel layer 2-3, and a protective layer 2-4. The first functional component is detachably used in the hollow part of the fixing component, the maximum shape of the first functional component corresponds to the shape of the fixing component, and the hydrogel layer corresponds to the hollow part and is completely filled. The first connecting layer is positioned below the adsorption layer and in the same direction with the hydrogel, and the position relation is as follows: the periphery of the absorption layer is connected with the fixed layer through a connecting layer, and the center of the absorption layer is a gel layer which is in contact with the wound.

In the first functional component, the waterproof layer 2-1 is preferably a PU film with high air permeability, high elasticity and softness; the outermost dimension of the waterproof layer of the first functional component is between the waterproof isolation layers of the fixed components. If the first connecting layer 2-5 in the form of the viscose is connected with the fixed component, the viscose is coated on the outermost side of the waterproof layer of the first functional component by at least 3mm in width, can be medical pressure-sensitive adhesive or self-adhesive silicone gel, and is connected with the waterproof isolating layer of the fixed component through the viscose.

In the first functional component, the adsorption layer 2-2 can be a material layer with liquid absorption function such as needle punched cotton and absorbent cotton, and the thickness of the material layer is not more than 4 mm. The shape of the adsorption layer in the first functional component is the same as or similar to that of the waterproof layer in the first functional component, and the (outer) size of the adsorption layer is smaller than that of the waterproof layer by more than 3mm, so that the adsorption layer can be compounded with the waterproof layer in the first functional component in a full-area or non-full-surface mode through viscose or thermal compounding.

In the first functional assembly, the absorption layer absorbs and seeps, and the hemostatic gel layer mainly plays a role in cold compress cooling, hemostasis and pain relief and can be arranged in a single layer or a laminated layer.

In the embodiment of the application, the hemostatic gel layer is formed by alternately coating chitosan raw material and hydrogel on the first functional component adsorption layer. The hydrogel can be a polyvinylpyrrolidone (PVP) system, a polyvinyl alcohol (PVA) system hydrogel and the like prepared by radiation, the PVP system is optimized, radiation synthesis is carried out, an initiator and a cross-linking agent are not required to be added, and the hydrogel is good in biocompatibility and high in safety. Specifically, the hydrogel layer of the blood hydrogel stopping layer 2-3 of the first functional component is a wound contact layer, and is compounded with the adsorption layer of the first functional component in a way of spot coating or discontinuous gluing, wherein the width or the diameter of the adsorption layer is 2mm-20 mm. The first functional component stops the chitosan 2-7 and the hydrogel 2-3 of the blood coagulation adhesive layer to be alternately coated on the adsorption layer of the first functional component at intervals, and the adsorption layer can be respectively seen as a plurality of circles and squares which are alternately arranged and uniformly distributed in the figure 1. The area of the hemostatic gel is generally smaller than the area of the hydrogel, but the two are alternately coated. The water absorption of the hydrogel and the like are not particularly required due to the adsorption layer.

And a plurality of drainage channels 2-6 with the width of 1mm-3mm are reserved between the blood hydrogel stopping layers of the first functional component, so that the absorption layers can fully absorb and seep.

In addition, the protective layers 2-4 in the first functional assembly can be films with a release effect or waterproof paper with a release effect, and can be set to be in a half-broken or folded form or a form with a size larger than that of the waterproof layer, so that the protective layers can be removed conveniently in use.

In the later period of wound healing, the first functional component is removed, and the second functional component is selected and combined with the fixing component; the second functional component has a multilayer structure, provides a wet healing environment, a granulation tissue growth leveling platform at the later stage of healing, and simultaneously inhibits scar formation. With the surface away from the skin as the top, the second functional components shown in fig. 4 in the embodiment of the present application are, in order from top to bottom: 3-1 parts of a waterproof layer, 3-2 parts of a supporting layer, 3-5 parts of a second connecting layer, 3-3 parts of a hydrogel layer and 3-4 parts of a protective layer. Likewise, the second functional element is removably applied in the hollow of the fixing element, the maximum shape of which corresponds to the hollow of the fixing element and is completely filled.

In the second functional component, the waterproof layer 3-1 is preferably a PU microporous membrane with high air permeability, high elasticity and softness; the outermost dimension of the waterproof layer of the second functional component is between the waterproof isolation layers of the fixed components. If the second connecting layer 3-5 in the form of the viscose is connected with the fixed component, the viscose is coated on the outermost side of the waterproof layer of the second functional component by at least 3mm in width, can be medical pressure-sensitive adhesive or self-adhesive silicone gel, and is connected with the waterproof isolating layer of the fixed component through the viscose.

In the second functional component, the supporting layer 3-2 is preferably a non-woven fabric layer (also called non-woven fabric layer) having a shape the same as or similar to that of the waterproof layer in the second functional component, and the outer dimension of the supporting layer is not larger than that of the waterproof layer in the second functional component but larger than that of the fixing component, and can be combined with the waterproof layer in the second functional component in a full-area or non-full-area manner by using an adhesive or thermal combination method. For the non-woven fabric layer, the processing modes such as spunlace, needling, melt-blowing and the like can be adopted, and no specific requirements are made on components such as terylene, pure cotton and the like.

In the second functional assembly, the hydrogel layer 3-3 is combined with the support layer in a full-covering mode, mainly plays a role in cold compress, providing a wet environment to promote wound healing and blocking bacteria, and can be formed by a PVP system, a PVA system and the like, and the PVA system is preferably selected. The hydrogel layer is not larger than the supporting layer and not smaller than the inner size of the fixing component.

In addition, the protective layers 3-4 in the second functional assembly can be films with a release effect or waterproof paper with a release effect, and can be set to be in a half-broken or folded form or a form with a size larger than that of the waterproof layer, so that the protective layers can be removed conveniently in use.

In the embodiment of the application, the total thickness of the first functional component and the second functional component is not less than that of the fixing component, the total thickness of the first functional component and the second functional component is not more than 5mm, wherein the thickness of the hydrogel layer is 1mm-3mm, and the replacement time is generally not more than 72h according to the drying degree and exudation of the hydrogel; when in use, the first functional component hemostatic gel layer and the second functional component hydrogel layer can be fully contacted with a wound to promote the wound healing.

In some embodiments, if the fixed subassembly of combination formula aquogel dressing and the connected mode of functional unit adopt modes such as magic subsides, buckle, frenulum deviate from through machine line processing mode and fixed subassembly fixed adsorbed layer and paste layer one side, sew up with adsorbed layer orientation hemostasis hydrogel layer one side, second functional unit supporting layer orientation hydrogel layer one side in the first functional unit, correspond position obligated space at fixed subassembly waterproof isolation layer respectively, expose magic subsides, buckle.

In the embodiment of this application, the fixed subassembly of dressing is by waterproof isolation layer, fixed adsorbed layer, paste layer, protective layer and constitute, for once fixed, use repeatedly, reduces to change the dressing number of times, reduces the dressing and takes off the damage of time to skin, and modes such as accessible mucigel, magic subsides, buckle, frenulum are connected with functional component. The fixing component only needs to be fixed and removed for 1 time in the whole wound healing process, and mechanical damage to multiple skins in the multiple removal process is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A combined hydrogel dressing for wound healing is characterized by comprising a fixing component, a first functional component and a second functional component, wherein the fixing component is provided with a hollow closed cross section, takes the surface far away from the skin as the upper part, and comprises a waterproof isolating layer, a fixed adsorption layer and an adhesive layer which are sequentially compounded from top to bottom;

the first functional component is used at the initial stage of wound healing and comprises an adsorption layer, a first connecting layer and a hemostasis gel layer which are sequentially compounded from top to bottom;

the second functional component is used in the later period of wound healing and comprises a supporting layer, a second connecting layer and a hydrogel layer which are sequentially compounded from top to bottom;

the first functional component and the second functional component are detachably used in the hollow part of the fixing component respectively and are connected through the first connecting layer and the second connecting layer when in use.

2. The combined hydrogel dressing according to claim 1, wherein the waterproof isolating layer in the fixing component is a breathable elastic polymer material layer, and is compounded with the non-whole surface of the fixing and adsorbing layer through hot melt adhesive; the fixing component is preferably of a square-shaped or annular cross section, wherein the waterproof isolating layer covers the fixing adsorption layer and the sticking layer.

3. The combined hydrogel dressing according to claim 2, wherein the fixing and adsorbing layer in the fixing component is a foam cotton layer or a needle-punched cotton layer, the shape of the fixing and adsorbing layer is preferably the same as that of the waterproof isolation layer, the outer diameter of the fixing and adsorbing layer is less than the waterproof isolation layer by more than 2mm, and the inner diameter of the fixing and adsorbing layer is greater than the waterproof isolation layer by more than 2 mm.

4. The combined hydrogel dressing of claim 2, wherein the adhesive layer of the fixing component is combined with the fixing and absorbing layer by intermittent gluing; preferably, the waterproof isolating layer is compounded with the side, facing the skin, of the waterproof isolating layer in a full coating mode with the width of 2mm-5 mm.

5. The combined hydrogel dressing of claim 1, wherein the first functional component blood coagulation stopping glue layer is formed by alternately coating chitosan raw material and hydrogel on the first functional component adsorption layer.

6. The combined hydrogel dressing of claim 5, wherein the first functional component and the blood coagulation stopping adhesive layer are provided with a plurality of drainage channels with the width of 1mm-3 mm.

7. The combined hydrogel dressing of claim 1, wherein the support layer of the second functional component is a non-woven layer with an area larger than the hollow of the fixing component.

8. The combined hydrogel dressing of any one of claims 1 to 7, wherein the total thickness of the first or second functional components is not less than the total thickness of the fastening component, such that the hemostatic gel layer or hydrogel layer is in contact with the wound in use.

9. The combined hydrogel dressing of any one of claims 1 to 7, wherein each of the first and second functional components independently further comprises a water-proof layer laminated to the uppermost layer.

10. The combined hydrogel dressing of any one of claims 1 to 7, wherein the fixing component, the first functional component and the second functional component each independently further comprise a protective layer compounded on the lowermost layer.

Images