Antibacterial composite dressing plaster easy to use
By designing a multi-layered antibacterial composite dressing, the problems of insufficient absorbency and inadequate hemostasis in burn care materials have been solved. This enables rapid hemostasis, absorption of exudate, and promotion of wound healing, while avoiding secondary trauma, providing a moist environment, and facilitating non-invasive dressing changes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI LIYUN ZHICAI MEDICAL BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-01-15
- Publication Date
- 2026-04-21
AI Technical Summary
Existing burn care materials have limited absorbency, lack fixation function, and require frequent replacement, leading to pain and secondary trauma. Traditional hemostatic materials have insufficient absorbency and volume, making it difficult to cope with massive bleeding. Furthermore, they have poor adhesion to complex wound surfaces and are prone to sticking to the wound.
A multi-layered antibacterial composite dressing was designed, including an adhesive layer, a drug delivery layer, and a protective layer. The sponge layer and microporous film layer are made of materials such as quaternary ammonium salt chitosan and sodium alginate, which have high liquid absorption, antibacterial properties, and good fit. Non-invasive replacement is achieved through the silicone film layer.
It achieves rapid hemostasis, absorbs large amounts of exudate, promotes wound healing, avoids secondary damage, provides a moist environment, and facilitates observation and dressing changes.
Smart Images
Figure CN224141045U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical dressing technology, and in particular to an antibacterial composite dressing patch that is easy to use. Background Technology
[0002] Wound management is a crucial aspect of clinical care, particularly the treatment of burn exudates and some chronic wounds. Highly effective absorbent materials are essential for burn care.
[0003] In burn care, the large amount of wound exudate places high demands on material performance. Currently available burn care materials include foam dressings, hydrogels, and flexible sponges, but they generally suffer from limited absorbency, lack of fixation, and the pain and secondary trauma caused by frequent material changes. In hemostasis, traditional medical gauze and gelatin sponges are common choices, but their absorbency and capacity are insufficient to handle massive bleeding. Some materials do not swell sufficiently after absorbing blood, failing to generate enough physical pressure for hemostasis.
[0004] In addition, these materials have poor adhesion to complex wound surfaces, making it difficult to achieve effective fixation, and they tend to stick to the wound during removal, increasing the risk of secondary trauma.
[0005] Therefore, there is an urgent need for an innovative material that combines high absorbency, good fit, and hemostasis, so as to both stop bleeding quickly and meet the needs of burn care for absorbing exudate. Utility Model Content
[0006] To address the shortcomings of the prior art, this utility model provides an antibacterial composite dressing that is easy to use. This antibacterial composite dressing has strong adhesion, provides a dry environment for the wound, is easy to change, does not come into contact with the wound and cause secondary damage, is inexpensive, achieves rapid hemostasis, promotes wound healing, and effectively prevents the formation of scars at the wound site.
[0007] A simple antibacterial composite dressing includes an adhesive layer, a drug delivery layer, and a protective layer stacked together.
[0008] The protective layer comprises two sheets, which respectively cover the drug delivery layer;
[0009] One end and both sides of the two pieces are attached to the edge of the adhesive layer, and the other end extends to the drug delivery layer and overlaps the drug delivery layer in an alternating manner.
[0010] The drug delivery layer includes:
[0011] A sponge tube is disposed between the adhesive layer and the protective layer and is fixed to the adhesive layer;
[0012] The sponge tube contains a microporous film layer, a first sponge layer, and a second sponge layer, which are stacked sequentially from the protective layer to the adhesive layer.
[0013] A gap is provided between the second sponge layer and the inner wall of the sponge tube;
[0014] The end of the second sponge layer away from the first sponge layer penetrates the adhesive layer, and a silicone film layer is provided on the end there. The silicone film layer is detachably attached to the adhesive layer.
[0015] The adhesive layer has through holes for penetrating the second sponge layer.
[0016] Preferably, the sponge tube is vertically disposed on the adhesive layer, and both ends are open;
[0017] The height of the sponge tube is sufficient to accommodate the microporous film layer, the first sponge layer, and the second sponge layer;
[0018] The microporous film layer is disposed at the bottom of the sponge tube and close to the protective layer.
[0019] Preferably, the first sponge layer and the sponge tube are both made of quaternary ammonium salt chitosan, sodium alginate, MBG, sodium chloride, calcium chloride, and glycerin.
[0020] Preferably, the second sponge layer is made of PVA.
[0021] Preferably, the adhesive layer is a medical polyurethane film layer.
[0022] Preferably, the thickness of the first sponge layer is 2-3 mm;
[0023] The thickness of the second sponge layer is 5-8mm;
[0024] The microporous film layer is made of carboxypropyl methylcellulose and has a thickness of 0.5-2 mm.
[0025] Preferably, it also includes a ring handle disposed on the silicone film layer.
[0026] Preferably, the annular handle, the silicone film layer, and the second sponge layer are a single integral part.
[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0028] This invention provides a simple antibacterial composite dressing. The dressing has a multi-layered structure, including a ring handle, a medical silicone film, an adhesive layer, a second sponge layer, a first sponge layer, a microporous film layer, a sponge tube, and a protective layer. This invention utilizes the microporous film layer of carboxypropyl methylcellulose to maintain a moist environment in the wound while channeling excess exudate to the second sponge layer. The combination of the second sponge layer, the first sponge layer, and the sponge tube ensures that the material in contact with the wound is antibacterial and promotes healing, prevents the spread of exudate, allows for timely observation of whether the dressing needs to be changed, and avoids contact with the wound during replacement to prevent secondary damage.
[0029] The antibacterial composite dressing provided by this invention has the characteristics of absorbing a large amount of exudate, not sticking to the wound surface, promoting wound healing, and providing a moist environment for the wound. The structural design allows for timely dressing changes without touching the wound surface, thus avoiding secondary damage. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of this utility model;
[0031] Figure 2 This is the front view of this utility model;
[0032] Figure 3 This is a schematic diagram of the replacement device for the second sponge layer in this utility model. Detailed Implementation
[0033] The following describes several specific embodiments of this utility model in detail, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.
[0034] This utility model provides a simple-to-use antibacterial composite dressing patch. See [link to related product description] Figures 1-3 It includes an adhesive layer 3, a drug delivery layer, and a protective layer 8, which are stacked together.
[0035] The protective layer 8 comprises two sheets, which are respectively covered on the drug delivery layer; wherein one end and both sides of the two sheets are attached to the edge of the adhesive layer 3, and the other end extends to the drug delivery layer and overlaps the drug delivery layer in an alternating manner.
[0036] The drug delivery layer includes a sponge tube 7, which is disposed between the adhesive layer 3 and the protective layer 8 and fixed to the adhesive layer 3. A microporous film layer 6, a first sponge layer 5, and a second sponge layer 4 are sequentially stacked from the protective layer 8 to the adhesive layer 3 inside the sponge tube 7. A gap is provided between the second sponge layer 4 and the inner wall of the sponge tube 7. The end of the second sponge layer 4 away from the first sponge layer 5 penetrates the adhesive layer 3, and a silicone film layer 2 is disposed on this end. The silicone film layer 2 is detachably attached to the adhesive layer 3. A through hole is provided on the adhesive layer 3 for penetrating the second sponge layer 4.
[0037] Therefore, in this embodiment, the dressing is applied to the wound by peeling off the protective layer and attaching the microporous film layer 6 to the wound through the adhesive layer 3. The wound heals through the antibacterial drug provided by the first sponge layer 5. In addition, the second sponge layer 4 can absorb the fluid exudated from the wound. When it becomes saturated, it can be removed from the adhesive layer 3 through the silicone film layer 2 and a new second sponge layer 4 can be replaced, thereby avoiding the exudate from contaminating normal tissue.
[0038] In order to effectively administer the drug, a sponge tube 7 is vertically positioned on the adhesive layer 3, with both ends open; the height of the sponge tube 7 is sufficient to accommodate the microporous film layer 6, the first sponge layer 5, and the second sponge layer 4; wherein, the axis of the sponge tube is perpendicular to the adhesive layer.
[0039] A microporous film layer 6 is disposed at the bottom of the sponge tube 7 and close to the protective layer 8. The microporous film layer is made of carboxypropyl methylcellulose and has a thickness of 0.5-2 mm.
[0040] The first sponge layer 5 and the sponge cylinder 7 are both made of quaternary ammonium salt chitosan, sodium alginate, MBG, sodium chloride, calcium chloride, and glycerin. The thickness of the first sponge layer 5 is set to 2-3 mm.
[0041] The first sponge layer 5 and the sponge tube 7 were prepared by adjusting the ratio of the components. The sponge tube 7 turns into a gel when it comes into contact with liquid and adheres to the skin, which better fixes the overall position of the material and prevents the spread of exudate and contamination of normal tissue. At the same time, it avoids skin pain when peeling off the composite dressing.
[0042] The first sponge layer is made of sodium alginate, quaternary ammonium salt chitosan, calcium chloride, mesoporous active glass, glycerin, and sodium chloride. It has liquid absorption and antibacterial functions, with a thickness of 2-3 mm and a pore size between 30-50 µm.
[0043] It should be noted that the preparation process of the first sponge layer 5 is as follows: 2% sodium alginate (0.5M NaCl) and 3% quaternary ammonium chitosan (0.5M NaCl) solutions are prepared respectively, and the two solutions are placed in a 4... o In a refrigerator at room temperature (C), let stand for 12 hours to ensure complete dissolution and removal of air bubbles. Mix the prepared sodium alginate solution with the quaternary ammonium chitosan solution at a volume ratio of 3:2. Add 0.625 mg / mL MBG to the mixture, shake, and then place it in a refrigerator at room temperature (C). o Let the mixture stand in a refrigerator at -80°C for 12 hours, then mix thoroughly and remove air bubbles. Place the resulting homogeneous solution in a mold and incubate at -80°C. oAfter freezing at C for 12 hours, the porous composite material was thoroughly dried in a vacuum freeze dryer to obtain the porous composite material. The porous composite material was then immersed in a mixed solution for 6 hours. The volume ratio of glycerol to anhydrous ethanol in the mixed solution was 1:10, and it contained calcium chloride at a concentration of 0.1 mol / L. After immersion, the sample was removed and thoroughly dried in a hot air dryer to obtain the desired first sponge layer. The fabrication process for the sponge tube was the same as for sponge layer 5, but the amount of MBG added was 5 mg / mL.
[0044] The microporous membrane layer 6 contacts the wound surface, keeping it moist and facilitating tissue recovery. At the same time, it guides the fluid into the first sponge layer 5. The first sponge layer 5 is soft in texture and fits well with the microporous membrane layer 6, possessing certain functions such as fluid absorption, antibacterial ability, and wound healing promotion.
[0045] The second sponge layer 4 is made of PVA. It has extremely high absorbency, responsible for absorbing excess exudate. The exudate absorption can be observed through the upper medical polyurethane film, allowing for timely replacement. In other words, the second sponge layer 4, made of PVA, has high absorbency, a large capacity to absorb exudate, and can be replaced independently when saturated. It has a thickness of 5-8 mm and a pore size between 100-200 µm.
[0046] The adhesive layer 3 is a medical polyurethane film layer with multiple breathable micropores, which has the characteristics of being waterproof and breathable; in addition, there are two sheets made of medical silicone film as the protective layer; the other end extends in the direction of the long side of the medical polyurethane film layer; the width of the staggered coverage is the same as the width of the medical polyurethane film layer.
[0047] This embodiment also includes a ring-shaped handle disposed on the silicone film layer 2. See [link / reference] Figure 3 As shown, the ring handle, silicone film layer 2, and second sponge layer 4 are integrated into a single unit. This facilitates the replacement of the second sponge layer 4. In other words, the ring handle 1, medical silicone film 2, and second sponge layer 4 are designed as a single unit, forming a replacement kit. The medical silicone film 2 is larger than the second sponge layer 4 and can be fixed to the medical polyurethane film layer 3. The ring handle 1 is designed for easy replacement of the upper dressing.
[0048] Depending on different needs, cylindrical molds of different sizes can be made to produce composite dressings of different sizes, which can better fit wounds of different sizes.
[0049] To further illustrate the present invention, a simple antibacterial composite dressing is provided, see [link to relevant documentation]. Figure 1As shown, the medical polyurethane film layer is hollow in the middle. The area of the hollow part is larger than the bottom area of the second sponge layer but smaller than the area of the medical silicone film 2. The medical silicone film 2 has micro-adhesion, allowing it to adhere to the skin and be fixed to the medical polyurethane film, and it is easy to peel off when replacing.
[0050] The second sponge layer 4 is located in the middle of the medical polyurethane film layer 3;
[0051] The first sponge layer 5 is located at the bottom of the second sponge layer 4, has the same bottom area as the second sponge layer 4, and is lower in height than the sponge layer 4;
[0052] The sponge tube 7 is a hollow cylinder with an inner diameter the same as the bottom area of the first sponge layer 5, and a height sufficient to accommodate the second sponge layer 4 and the first sponge layer 5. The first sponge layer 5 and the sponge tube 7 are made from quaternary ammonium chitosan, sodium alginate, MBG, sodium chloride, calcium chloride, and glycerin, with varying proportions of these components. The second sponge layer 4 is characterized by its antibacterial and fluid-absorbing properties upon contact with the wound, while the sponge tube 7 is characterized by its gel-like structure after absorbing fluid, thus fixing the material in place. The quaternary ammonium chitosan functions to absorb fluid, has antibacterial properties, and promotes healing; sodium alginate absorbs exudate; MBG enhances bioactivity and promotes tissue repair; and glycerin moisturizes, regulates moisture levels, and increases the material's flexibility.
[0053] This embodiment provides a simple antibacterial composite dressing. When using it, first clean and disinfect the wound. After cleaning, peel off the two protective layers of the composite dressing, align the center of the microporous film layer 6 with the wound, contact the sponge tube with the surrounding normal tissue, and then apply the surrounding adhesive medical polyurethane film layer to the skin.
[0054] In this embodiment, the overall material and several upper replacement packs are individually sealed and packaged. The packaging is made of medical polyester film and is placed together in a sterilized outer packaging, which is made of an outer layer of aluminum foil and an inner layer of polyethylene.
[0055] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A simple antibacterial composite dressing patch for use, characterized by, It includes an adhesive layer, a drug delivery layer, and a protective layer that are stacked together; The protective layer comprises two sheets, which respectively cover the drug delivery layer; One end and both sides of the two pieces are attached to the edge of the adhesive layer, and the other end extends to the drug delivery layer and overlaps the drug delivery layer in an alternating manner. The drug delivery layer includes: A sponge tube is disposed between the adhesive layer and the protective layer and is fixed to the adhesive layer; The sponge tube contains a microporous film layer, a first sponge layer, and a second sponge layer, which are stacked sequentially from the protective layer to the adhesive layer. A gap is provided between the second sponge layer and the inner wall of the sponge tube; The end of the second sponge layer away from the first sponge layer penetrates the adhesive layer, and a silicone film layer is provided on the end there. The silicone film layer is detachably attached to the adhesive layer. The adhesive layer has through holes for penetrating the second sponge layer.
2. The simple antibacterial composite dressing according to claim 1, characterized in that, The sponge tube is vertically positioned on the adhesive layer, with both ends open; The height of the sponge tube is sufficient to accommodate the microporous film layer, the first sponge layer, and the second sponge layer; The microporous film layer is disposed at the bottom of the sponge tube and close to the protective layer.
3. The simple antibacterial composite dressing patch for use according to claim 1, characterized in that, The first sponge layer and the sponge tube are both made of quaternary ammonium salt chitosan, sodium alginate, MBG, sodium chloride, calcium chloride and glycerin.
4. The simple antibacterial composite dressing patch for use according to claim 1, characterized in that, The second sponge layer is made of PVA.
5. The simple antibacterial composite dressing patch for use according to claim 1, characterized in that, The adhesive layer is a medical-grade polyurethane film layer.
6. The simple antibacterial composite dressing patch for use according to claim 1, characterized in that, The thickness of the first sponge layer is 2-3 mm; The thickness of the second sponge layer is 5-8mm; The microporous film layer is made of carboxypropyl methylcellulose and has a thickness of 0.5-2 mm.
7. The simple antibacterial composite dressing according to claim 1, characterized in that, It also includes a ring handle disposed on the silicone film layer.
8. The simple antibacterial composite dressing patch for use according to claim 7, characterized in that, The ring handle, the silicone film layer, and the second sponge layer are a single unit.