Novel silicone foam composite dressing
By designing a multi-layered composite silicone foam dressing, the problems of insufficient antibacterial and analgesic effects, inability to remove odor, and inability to monitor exudate saturation in real time of existing foam dressings have been solved, achieving efficient wound healing and safe care.
Patent Information
- Application Number
- CN202323322556.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2033-12-07
AI Technical Summary
Existing foam dressings lack antibacterial and analgesic effects, cannot remove wound odor, and cannot monitor exudate saturation in real time. Frequent removal of the dressing can easily cause secondary damage.
A novel silicone foam composite dressing was designed, comprising a protective layer, an anti-adhesion composite drug-carrying layer, a wound-protecting layer, an antibacterial and deodorizing diversion layer, a foam layer, a color-developing layer, and a backing layer. The layers are arranged in a close sequence. The dressing utilizes materials such as a silicone gel perforated layer, drug-carrying sustained-release gel, graphene fiber, and chitosan knitted fabric, combined with an acid-base indicator, to achieve antibacterial, analgesic, diversion, and color-developing functions.
It achieves antibacterial, analgesic, odor-removing, rapid drainage, and visual monitoring of wounds, preventing adhesions and improving wound healing efficiency and safety.
Smart Images
Figure CN222304158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical dressings, in particular to a novel silicone foam composite dressing. Background Art
[0002] Medical dressings are medical materials used to cover wounds or other injuries. They can establish a temporary protective barrier for the damaged epidermis and provide a suitable healing environment for the wound. Chronic wounds such as pressure sores, burns, venous ulcers, and diabetic foot often have more exudate. Foam dressings are often used clinically to care for such wounds. The structure of foam dressings generally includes a release layer, a silicone anti-adhesion layer, a foam layer, a high-absorbency cotton sheet layer, and a waterproof and antibacterial polyurethane backing layer. Although existing foam dressings can absorb a large amount of wound exudate, relieve wound pressure, maintain a moist wound environment, and prevent wound adhesion, they still have many advantages: (1) They have no antibacterial properties or have poor antibacterial effects and no analgesic effect. Wound exudate is often accompanied by wound infection, which aggravates the inflammatory response and further irritates the wound. (2) They have no function of removing wound odor. Wound odor is usually caused by necrotic tissue or infection, or a combination of both. Wound odor is unbearable for patients' families and medical staff. (3) It is impossible to observe when the dressing is saturated with exudate, and the dressing needs to be frequently opened to observe the wound, which creates the risk of secondary injury. Utility Model Content
[0003] Based on this, the purpose of the utility model is to provide a novel silicone foam composite dressing in view of the deficiencies in the prior art.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A novel silicone foam composite dressing comprises a composite protective layer, an anti-adhesion composite drug-carrying layer, a wound-protecting layer, an antibacterial and deodorizing diversion layer, a foam layer, a color-developing layer, and a backing layer, which are laminated in sequence from close to the wound surface to far from the wound surface, and each layer is closely arranged in sequence;
[0006] The anti-adhesion composite drug-carrying layer, wound protection layer, antibacterial and deodorizing diversion layer, foam layer, and color development layer have the same size, which is 5-15 cm in length and 5-15 cm in width, which are all smaller than the protective layer and the backing layer; the protective layer and the backing layer have the same size, which is 4-14 cm in length and 4-14 cm in width; the colored acid-base indicator strip on the backing layer is 0.5-1 cm in length and 2-4 cm in width.
[0007] As a further improvement of the utility model, the anti-adhesion composite drug-loaded layer comprises a silicone gel perforated layer and a drug-loaded sustained-release gel, the drug-loaded sustained-release gel is filled in the holes of the silicone gel perforated layer, and the thickness of the anti-adhesion composite drug-loaded layer is 0.2-1 mm.
[0008] As a further improvement of the utility model, the perforation rate of the silicone gel perforated layer is 40-80%, and the diameter of the holes in the silicone gel perforated layer is a round hole or a square hole with a diameter of 2-6 mm; the holes in the silicone gel perforated layer are filled with a drug-loaded sustained-release gel, and the drug-loaded sustained-release gel includes antibacterial drugs, analgesics and polyvinyl alcohol polymer film; the polyvinyl alcohol polymer film is composed of polyvinyl alcohol, and the average relative molecular mass of the polyvinyl alcohol is 2000-75000, and the degree of alcoholysis is 80%-90%.
[0009] As a further improvement of the utility model, the antibacterial drug is one or more of erythromycin, mupirocin, bifonazole, terbinafine hydrochloride, ofloxacin, metronidazole, chlortetracycline hydrochloride, tetracycline, and neomycin sulfate; the analgesic drug is one or more of lidocaine hydrochloride, dyclonine hydrochloride, tetracaine hydrochloride, lincomycin lidocaine, prilocaine, lidocaine, procaine, tetracaine, and ropivacaine.
[0010] As a further improvement of the present invention, the color developing layer is 0.5-1 cm long and 0.5-1 cm wide, the color developing layer is a grid structure, and the acid-base indicator of the color developing layer is anthocyanin; the color developing layer changes color when encountering wound exudate, and wound exudate with different pH values will cause the color developing layer to present different colors, which is convenient for medical staff to judge the absorption of exudate by the dressing and the condition of the wound; when acidic wound exudate contacts the color developing layer, the color of the acid-base indicator changes to red, and when alkaline wound exudate contacts the color developing layer, the color of the acid-base indicator changes to blue.
[0011] As a further improvement of the utility model, the antibacterial and deodorizing guide layer is graphene fiber, and the thickness of the antibacterial and deodorizing guide layer is 0.5-1.5mm. The antibacterial and deodorizing guide layer can prevent wound adhesion, wound infection, and wound pain; the anti-adhesion composite drug-carrying layer has antibacterial and antibacterial properties, which can prevent microorganisms from growing inside the dressing; it has moisture absorption and moisture conduction properties, which can quickly guide wound exudate to the highly absorbent foam layer; it has low-temperature far-infrared function, which can absorb and radiate far-infrared rays from the human body, thereby promoting blood circulation, increasing cell vitality, and improving the body's immunity; it also has the function of removing odor caused by microbial reproduction.
[0012] As a further improvement of the utility model, the wound protection layer is a hydrophilic modified chitosan knitted fabric, which can inhibit the reproduction of harmful microorganisms, and the thickness of the wound protection layer is 0.3-1mm. The hydrophilic modified chitosan knitted fabric can quickly absorb wound exudate, transform into a gel state, and has certain antibacterial and antibacterial properties, and can promote the aggregation of red blood cells and platelets, thereby accelerating hemostasis.
[0013] As a further improvement of the utility model, the foam layer is hydrophilic polyurethane foam or polyvinyl alcohol foam, which can absorb a large amount of wound exudate and relieve wound pressure. The thickness of the foam layer is 1.5-3 mm.
[0014] As a further improvement of the utility model, the protective layer is a single silicon glassine release paper, the thickness of the protective layer is 0.2-1mm, and the middle section of the protective layer has an arc-shaped warped edge to facilitate the removal of the protective layer; the backing layer has waterproof, breathable and antibacterial functions, and a colored acid-base indicator strip is pasted on the side away from the wound. The backing layer is a skin-colored transparent polyurethane film, and the thickness of the backing layer is 0.02-0.1mm.
[0015] As a further improvement of the utility model, the protective layer and the anti-adhesion composite drug-carrying layer are naturally bonded; the anti-adhesion composite drug-carrying layer and the wound protection layer are naturally bonded; the wound protection layer and the antibacterial and deodorizing diversion layer are bonded by hot pressing; the antibacterial and deodorizing diversion layer and the foam layer are bonded by pressure-sensitive adhesive; the acid-base indicator on the color developing layer is printed onto the backing layer by inkjet printing, and the foam layer and the backing layer are bonded by pressure-sensitive adhesive.
[0016] Preferably, the thickness of the protective layer is 0.2mm; the thickness of the anti-adhesion composite layer is 0.4mm, the perforation rate is 50%, and the pore size is 4mm; the thickness of the wound protection layer is 0.4mm, the thickness of the antibacterial and deodorizing diversion layer is 0.6mm, the thickness of the foam layer is 2mm, and the thickness of the backing layer is 0.05mm.
[0017] The beneficial effects of the utility model are:
[0018] 1. The anti-adhesion composite drug-loaded layer of the present application is composed of a silicone gel perforated layer and a drug-loaded sustained-release gel, which fully utilizes the spatial structure of the silicone gel perforated layer, thereby preventing wound adhesion while increasing the antibacterial and analgesic effects.
[0019] 2. The antibacterial and deodorizing diversion layer of the present application is graphene fiber, which has antibacterial and antibacterial properties, and can prevent the growth of microorganisms inside the dressing; it has moisture absorption and moisture conduction properties, and can quickly divert wound exudate to the highly absorbent foam layer; it has low-temperature far-infrared function, and can absorb and radiate far-infrared rays from the human body, thereby promoting blood circulation, increasing cell vitality, and improving the body's immunity; it also has the function of removing odors caused by microbial reproduction.
[0020] 3. The present application uses inkjet printing to print the acid-base indicator on the color-developing layer onto the backing layer without occupying the space of the dressing. The acid-base indicator anthocyanin is a natural pigment widely found in plants and has no toxic effects. The color-developing layer has a grid-like structure, which is convenient for observing the absorption of wound exudate by the dressing. It also displays the pH of the wound exudate, which is convenient for medical staff to judge the healing of the wound and provide timely treatment.
[0021] 4. The wound protection layer of the present application is a hydrophilic modified chitosan knitted fabric, which can quickly absorb wound exudate and form a gel, has a stronger fluid retention ability, and has a certain antibacterial and hemostatic effect.
[0022] 5. The novel silicone foam composite dressing prepared in the present application can quickly absorb wound exudate while having multiple functions such as analgesia, anti-infection, deodorization, hemostasis, visualization, anti-adhesion, and promotion of wound healing. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Attached Figure 1 The figure is a schematic diagram of the overall structure of the dressing of the utility model.
[0025] Attached Figure 2 Schematic diagram of the local structure of the anti-adhesion composite drug-carrying layer.
[0026] Attached Figure 3 Schematic diagram of the side of the backing layer away from the wound.
[0027] Attached Figure 4 For attachment Figure 2 A locally enlarged schematic diagram of the drug-loaded sustained-release gel filled in the holes of the silicone gel perforated layer.
[0028] In the figure: 1 is a protective layer, 2 is an anti-adhesion composite drug-loaded layer, 21 is a silicone gel perforated layer, 22 is a drug-loaded sustained-release gel, 3 is a wound protection layer, 4 is an antibacterial and deodorizing diversion layer, 5 is a foam layer, 6 is a color development layer, 7 is a backing layer, 8 is an arc-shaped warped edge, and 9 is a color acid-base indicator strip. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] The structure of a novel silicone foam composite dressing prepared in this application is as follows Figures 1 to 4As shown, it includes a composite protective layer 1, an anti-adhesion composite drug-carrying layer 2, a wound protection layer 3, an antibacterial and deodorizing diversion layer 4, a foam layer 5, a color development layer 6, and a backing layer 7, which are stacked in sequence from close to the wound surface to far from the wound surface, and each layer is closely arranged in sequence;
[0031] The anti-adhesion composite drug-carrying layer 2, wound protection layer 3, antibacterial and deodorizing diversion layer 4, foam layer 5, and color development layer 6 are of the same size, 5-15 cm in length and 5-15 cm in width, which are smaller than the protective layer 1 and the backing layer 7; the protective layer 1 and the backing layer 7 are of the same size, 4-14 cm in length and 4-14 cm in width; the colored acid-base indicator strip 9 provided on the backing layer 7 is 0.5-1 cm in length and 2-4 cm in width.
[0032] In a specific embodiment, further, the anti-adhesion composite drug-loaded layer 2 is composed of a silicone gel perforated layer 21 and a drug-loaded sustained-release gel 22, the drug-loaded sustained-release gel 22 is filled in the holes of the silicone gel perforated layer 21, and the thickness of the anti-adhesion composite drug-loaded layer 2 is 0.2-1 mm.
[0033] In a specific embodiment, further, the perforation rate of the silicone gel perforated layer 21 is 40-80%, the thickness of the silicone gel perforated layer 21 is 0.2-1mm, and the diameter of the holes of the silicone gel perforated layer 21 is a circular hole or a square hole of 2-6mm; the holes in the silicone gel perforated layer 21 are filled with a drug-loaded sustained-release gel 22, and the drug-loaded sustained-release gel 22 includes antibacterial drugs, analgesics and polyvinyl alcohol polymer film; the antibacterial drugs and analgesics do not contain water or have extremely low water content, and are wrapped by a polyvinyl alcohol polymer film; the polyvinyl alcohol polymer film is composed of polyvinyl alcohol, and the average relative molecular mass of the polyvinyl alcohol is 2000-75000, and the degree of alcoholysis is 80-90%.
[0034] In a specific embodiment, further, the antibacterial drug is one or more of erythromycin, mupirocin, bifonazole, terbinafine hydrochloride, ofloxacin, metronidazole, chlortetracycline hydrochloride, tetracycline, and neomycin sulfate; the analgesic drug is one or more of lidocaine hydrochloride, dyclonine hydrochloride, tetracaine hydrochloride, lincomycin lidocaine, prilocaine, lidocaine, procaine, tetracaine, and ropivacaine.
[0035] In a specific embodiment, further, the color development layer 6 is 0.5-1 cm long and 0.5-1 cm wide, the color development layer is a grid structure, and the acid-base indicator of the color development layer 6 is anthocyanin; the color development layer 6 changes color when encountering wound exudate, and wound exudate with different pH values will cause the color development layer 6 to present different colors, which is convenient for medical staff to judge the absorption of exudate by the dressing and the condition of the wound; when acidic wound exudate contacts the color development layer 6, the color of the acid-base indicator changes to red, and when alkaline wound exudate contacts the color development layer 6, the color of the acid-base indicator changes to blue.
[0036] In a specific embodiment, further, the antibacterial and deodorizing guide layer 4 is graphene fiber, and the thickness of the antibacterial and deodorizing guide layer 4 is 0.5-1.5mm. The antibacterial and deodorizing guide layer can prevent wound adhesion, wound infection, and wound pain; the anti-adhesion composite drug-carrying layer has antibacterial and antibacterial properties, which can prevent microorganisms from growing inside the dressing; it has moisture absorption and moisture conduction properties, which can quickly guide wound exudate to the highly absorbent foam layer; it has low-temperature far-infrared function, which can absorb and radiate far-infrared rays from the human body, thereby promoting blood circulation, increasing cell vitality, and improving the body's immunity; it also has the function of removing odor caused by microbial reproduction.
[0037] In a specific embodiment, further, the wound protection layer 3 is a hydrophilically modified chitosan knitted fabric, which can inhibit the reproduction of harmful microorganisms, and the thickness of the wound protection layer 3 is 0.3-1 mm. The hydrophilically modified chitosan knitted fabric can quickly absorb wound exudate, transform into a gel state, and has certain antibacterial and antibacterial properties, and can promote the aggregation of red blood cells and platelets, thereby accelerating hemostasis.
[0038] In a specific embodiment, further, the foam layer 5 is a hydrophilic polyurethane foam or a polyvinyl alcohol foam, which can absorb a large amount of wound exudate and relieve wound pressure. The thickness of the foam layer 5 is 1.5-3 mm.
[0039] In a specific embodiment, further, the protective layer 1 is a single silicon glassine release paper, the thickness of the protective layer 1 is 0.2-1mm, and the middle section of the protective layer 1 has an arc-shaped warped edge 8 to facilitate the removal of the protective layer 1; the backing layer 7 has waterproof, breathable, and antibacterial functions, and the backing layer 7 is pasted with a colored acid-base indicator strip 9 on the side away from the wound, and the backing layer 7 is a skin-colored transparent polyurethane film, and the thickness of the backing layer 7 is 0.02-0.1mm.
[0040] In a specific embodiment, further, the protective layer 1 and the anti-adhesion composite drug-carrying layer 2 are naturally bonded; the anti-adhesion composite drug-carrying layer 2 and the wound protection layer 3 are naturally bonded; the wound protection layer 3 and the antibacterial and deodorizing diversion layer 4 are bonded by hot pressing; the antibacterial and deodorizing diversion layer 4 and the foam layer 5 are bonded by pressure-sensitive adhesive; the acid-base indicator on the color development layer 6 is printed onto the backing layer 7 by inkjet printing, and the foam layer 5 and the backing layer 7 are bonded by pressure-sensitive adhesive.
[0041] In a specific embodiment, preferably, the thickness of the protective layer is 0.2 mm; the thickness of the anti-adhesion composite layer is 0.4 mm, the perforation rate is 50%, and the pore size is 4 mm; the thickness of the wound protection layer is 0.4 mm, the thickness of the antibacterial and deodorizing diversion layer is 0.6 mm, the thickness of the foam layer is 2 mm, and the thickness of the backing layer is 0.05 mm.
[0042] The novel silicone foam composite dressing prepared by the technical solution of the utility model can effectively prevent the adhesion between the wound and the dressing, and has multiple functions such as efficient liquid absorption, analgesia and anti-infection, removal of wound odor, hemostasis and promotion of wound healing, and visualization of liquid absorption status.
[0043] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
[0044] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
Claims
1. A novel silicone foam composite dressing, characterized in that: It comprises a composite protective layer (1), an anti-adhesion composite drug-carrying layer (2), a wound protection layer (3), an antibacterial and deodorizing diversion layer (4), a foam layer (5), a color development layer (6), and a backing layer (7) which are stacked in sequence from close to the wound surface to far from the wound surface, and each layer is closely arranged in sequence; The anti-adhesion composite drug-carrying layer (2), the wound protection layer (3), the antibacterial and deodorizing diversion layer (4), the foam layer (5), and the color development layer (6) are of the same size, with a length of 5-15 cm and a width of 5-15 cm, and are smaller than the protective layer (1) and the backing layer (7); the protective layer (1) and the backing layer (7) are of the same size, with a length of 4-14 cm and a width of 4-14 cm; the colored acid-base indicator strip (9) provided on the backing layer (7) is 0.5-1 cm long and 2-4 cm wide.
2. The foam composite dressing according to claim 1, characterized in that: The anti-adhesion composite drug-loaded layer (2) comprises a silicone gel perforated layer (21) and a drug-loaded sustained-release gel (22), wherein the drug-loaded sustained-release gel (22) is filled in the holes of the silicone gel perforated layer (21), and the thickness of the anti-adhesion composite drug-loaded layer (2) is 0.2-1 mm.
3. The foam composite dressing according to claim 2, characterized in that: The perforation rate of the silicone gel perforated layer (21) is 40-80%, and the diameter of the holes in the silicone gel perforated layer (21) is a round hole or a square hole with a diameter of 2-6 mm; the holes in the silicone gel perforated layer (21) are filled with a drug-loaded sustained-release gel (22).
4. The foam composite dressing according to claim 1, characterized in that: The color developing layer (6) has a length of 0.5-1 cm and a width of 0.5-1 cm. The color developing layer (6) is a grid-like structure. The acid-base indicator of the color developing layer (6) is anthocyanin. When acidic wound exudate contacts the color developing layer (6), the color of the acid-base indicator changes to red. When alkaline wound exudate contacts the color developing layer (6), the color of the acid-base indicator changes to blue.
5. The foam composite dressing according to claim 1, characterized in that: The antibacterial and deodorizing guide layer (4) is graphene fiber, and the thickness of the antibacterial and deodorizing guide layer (4) is 0.5-1.5 mm.
6. The foam composite dressing according to claim 1, characterized in that: The wound protection layer (3) is a hydrophilically modified chitosan knitted fabric, and the thickness of the wound protection layer (3) is 0.3-1 mm.
7. The foam composite dressing according to claim 1, characterized in that: The foam layer (5) is hydrophilic polyurethane foam or polyvinyl alcohol foam, and the thickness of the foam layer (5) is 1.5-3 mm.
8. The foam composite dressing according to claim 1, characterized in that: The protective layer (1) is a single silicon glassine release paper, the thickness of the protective layer (1) is 0.2-1 mm, the middle section of the protective layer (1) has an arc-shaped warped edge (8), the backing layer (7) has a colored acid-base indicator strip (9) attached to the side away from the wound, the backing layer (7) is a skin-colored transparent polyurethane film, and the thickness of the backing layer (7) is 0.02-0.1 mm.
9. The foam composite dressing according to any one of claims 1 to 8, characterized in that: The protective layer (1) and the anti-adhesion composite drug-carrying layer (2) are naturally bonded; the anti-adhesion composite drug-carrying layer (2) and the wound protection layer (3) are naturally bonded; the wound protection layer (3) and the antibacterial and deodorizing diversion layer (4) are bonded by hot pressing; the antibacterial and deodorizing diversion layer (4) and the foam layer (5) are bonded by pressure-sensitive adhesive; the acid-base indicator on the color development layer (6) is printed onto the backing layer (7) by inkjet printing, and the foam layer (5) and the backing layer (7) are bonded by pressure-sensitive adhesive.