Dressing patch for wound nursing, auxiliary device and use method

Abstract

The invention relates to the technical field of wound surface nursing, in particular to a dressing patch for wound surface nursing, an auxiliary device and a using method, and the dressing patch comprises a hydrophilic layer composed of beta-glucan and oxidized sodium carboxymethyl cellulose mixed fibers, an adsorption layer formed by compounding super absorbent resin and alginate, and an auxiliary layer formed by compounding the super absorbent resin and the alginate, which are sequentially stacked from inside to outside, and the hydrophilic layer is formed by compounding the beta-glucan and the oxidized sodium carboxymethyl cellulose mixed fibers, and the adsorption layer is formed by compounding the beta-glucan and the oxidized sodium carboxymethyl cellulose mixed fibers. The breathable layer is a polyurethane film and is in direct contact with a wound surface through the hydrophilic layer, active drainage, antibiosis and non-adhesion are achieved by means of the antibiosis and healing promoting characteristics of beta-glucan and the rapid liquid absorption performance of oxidized sodium carboxymethyl cellulose, the adsorption layer is compounded with alginate through super absorbent resin, ultra-large-capacity absorption and gelation water locking are achieved, and the wound surface is covered with the breathable layer. A wet healing environment is maintained, and the breathable layer realizes the balance of bacteria resistance, water resistance and breathability through a polyurethane film.

Description

Technical Field

[0001] This invention relates to the field of wound care technology, and in particular to a dressing patch, auxiliary device, and method of use for wound care. Background Technology

[0002] Wound care is an important part of the medical process. Its core objectives are to protect the wound, control infection, manage exudate, and create a suitable healing environment for tissue regeneration. Modern wound dressings need to have multiple functions, such as effectively managing exudate, keeping the wound moist, preventing bacterial invasion, and avoiding secondary damage during dressing changes.

[0003] Currently available dressings, such as traditional gauze, foam dressings, hydrocolloid dressings, and alginate dressings, each have their advantages, but also certain limitations. For example, traditional gauze has limited absorbency and tends to adhere to newly formed granulation tissue after absorbing liquid, leading to severe pain and secondary damage during changes. Foam dressings are prone to backflow after absorbing liquid, causing maceration of the surrounding skin. Alginate or superabsorbent resin dressings, which are composed of a single material, struggle to achieve a balance between strong absorbency, good antibacterial properties, suitable gel physical properties, and user comfort.

[0004] Therefore, a dressing patch, auxiliary device, and method of use for wound care are proposed. Summary of the Invention

[0005] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0006] To address the shortcomings of existing technologies, one objective of this invention is to provide a dressing patch for wound care.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a dressing patch for wound care, comprising, in order of layering from the inside out: a hydrophilic layer composed of a mixture of β-glucan and sodium carboxymethyl cellulose, an absorbent layer composed of a superabsorbent resin and alginate, and a breathable layer, which is a polyurethane film.

[0008] As a preferred embodiment of the dressing patch for wound care described in this invention, the weight ratio of β-glucan to sodium carboxymethyl cellulose oxide is 1:4 to 1:2.

[0009] As a preferred embodiment of the dressing patch for wound care described in this invention, the absorbent layer has a water absorption ratio of 20 to 35 times its own weight, and can form a gel after absorbing physiological saline.

[0010] As a preferred embodiment of the dressing patch for wound care described in this invention, it further includes an outermost adhesive layer and a backing layer, the adhesive layer and the backing layer being connected, and the adhesive layer and the backing layer encapsulating a hydrophilic layer, an absorbent layer and a breathable layer.

[0011] The beneficial effects of the dressing patch auxiliary device for wound care of the present invention are as follows: The hydrophilic layer of the present invention utilizes a composite of β-glucan and sodium carboxymethyl cellulose oxide to quickly absorb exudate while avoiding adhesion to the wound surface, reducing pain and damage during dressing changes. The absorbent layer, through the use of superabsorbent resin and alginate, can still form a soft gel after achieving a large water absorption capacity, which avoids the insufficient absorption of traditional gauze and also prevents the discomfort of hard lumps formed by pure superabsorbent resin. The outer polyurethane film effectively blocks bacteria and external contamination while maintaining breathability.

[0012] To address the shortcomings of existing technologies, another objective of this invention is to provide a dressing patch auxiliary device for wound care.

[0013] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary device for wound care dressing patches, applied to wound care dressing patches, the auxiliary device includes: a fixing ring, at least two of which are provided, the two fixing rings are connected by a conduit, and a roll is connected to one of the fixing rings; an air control unit is provided inside the roll, the air control unit includes a first sealing component fixedly installed inside the roll and a second sealing component movably installed inside the roll, and a drive component connected to the second sealing component.

[0014] As a preferred embodiment of the dressing patch auxiliary device for wound care described in this invention, the first sealing component includes a ring fixedly disposed inside the roll, and a sealing plug is provided at the through hole of the ring, the sealing plug being connected to the ring via a spring.

[0015] As a preferred embodiment of the dressing patch auxiliary device for wound care according to the present invention, the second sealing component has the same structure as the first sealing component, and the ring in the second sealing component is movably disposed inside the roll.

[0016] As a preferred embodiment of the dressing patch auxiliary device for wound care described in this invention, wherein: a first air port is provided on one side of the roll, a first piston is provided at the first air port, and the first air port is located between the first sealing component and the fixing ring.

[0017] As a preferred embodiment of the dressing patch auxiliary device for wound care described in this invention, the air control unit further includes a lifting component connected to the fixing ring, the lifting component includes an air cushion communicating with the fixing ring, and a second piston is provided at the connection between the air cushion and the fixing ring.

[0018] The beneficial effects of the dressing patch auxiliary device for wound care of the present invention are as follows: the driving component drives the second sealing component to move back and forth, so that the first inflation component opens and closes, thereby causing the fixing ring to expand or contract, so that the fixing ring presses the adhesive layer tightly, avoiding the problem that the adhesive tape will easily lose its stickiness when there is a lot of sweat or long-term application, which will lead to the dressing shifting or falling off.

[0019] To address the shortcomings of existing technologies, another objective of this invention is to provide a method for using dressing patches for wound care.

[0020] To achieve the above objectives, the present invention adopts the following technical solution: a method for using a dressing patch for wound care, the dressing patch being applied to wound care includes the following steps: covering the wound with the dressing patch so that its hydrophilic layer contacts the wound; placing at least one retaining ring around the outer periphery of the dressing patch; operating the air control unit to inflate the retaining ring, causing it to expand; using the contraction force generated after expansion to compress and fix the edge of the dressing patch; when the dressing needs to be changed, operating the air control unit to deflate the retaining ring to relieve the pressure; and then separating the retaining ring from the dressing patch.

[0021] The beneficial effects of the dressing patch application method of the present invention for wound care are as follows: by attaching an inflatable and deflated fixing ring to the outer periphery of the dressing patch, physical fixation is achieved by utilizing the elastic contraction force after inflation, replacing the traditional adhesive fixation method. This fundamentally avoids skin allergies and tearing damage caused by adhesive tape. At the same time, the operation method of inflation and deflation makes the adjustment of the fixation force more precise and controllable, and the dressing replacement process is simpler and painless, significantly improving the safety of nursing operations and patient comfort. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the overall dressing patch of the present invention.

[0025] Figure 3 This is a schematic diagram of the overall structure of the dressing patch auxiliary device of the present invention.

[0026] Figure 4 For the present invention Figure 3 Enlarged view of position A.

[0027] Figure 5 This is a cross-sectional view of the roll position of the present invention.

[0028] Figure 6 This is a schematic diagram of the first enclosed component of the present invention.

[0029] In the diagram: 100, dressing patch; 101, hydrophilic layer; 102, absorbent layer; 103, breathable layer; 104, adhesive tape layer; 105, backing layer; 200, fixing ring; 201, conduit; 202, roll; 202a, first air inlet; 202b, first piston; 300, air control unit; 301, first sealing assembly; 301a, ring; 301b, sealing plug; 301c, spring; 302, second sealing assembly; 303, drive assembly; 304, lifting assembly; 304a, air cushion; 304b, second piston. Detailed Implementation

[0030] To make the objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] Reference Figure 1This embodiment provides an auxiliary device for wound care dressing patch 100, including a hydrophilic layer 101 stacked sequentially from the inside out, which is composed of a mixture of β-glucan and sodium carboxymethyl cellulose oxide fibers. Sodium carboxymethyl cellulose oxide provides rapid and efficient initial fluid absorption, quickly drawing wound exudate away from the wound surface. β-glucan endows the hydrophilic layer 101 with antibacterial properties and bioactivity that promotes tissue regeneration. The β-glucan and sodium carboxymethyl cellulose oxide work together to achieve active drainage superior to traditional gauze. More importantly, the mixed fiber structure remains soft and non-dense after absorbing exudate, fundamentally avoiding tight adhesion to new granulation tissue like traditional gauze. This greatly reduces patient pain and the risk of secondary injury when changing dressings.

[0035] The absorbent layer 102 is composed of superabsorbent polymer (SAP) and alginate. Alginate provides good biocompatibility and a basis for gel formation, while the superabsorbent polymer significantly improves the overall liquid absorption capacity, far exceeding that of traditional alginate dressings. More importantly, by controlling the proportion of superabsorbent polymer, this composite structure can form a soft, elastic, and structurally intact gel after absorbing a large amount of saline, rather than a hard lump formed after pure superabsorbent polymer absorbs water. This ensures sufficient absorption capacity to cope with highly exudative wounds, maintains a moist environment conducive to wound healing, avoids discomfort or pressure caused by an overly hard gel, and reduces the backflow problem of exudate, similar to some foam dressings.

[0036] The breathable layer 103 is a polyurethane film that effectively blocks the invasion of external bacteria and moisture, reducing the risk of infection. The polyurethane film has a high water vapor permeability, allowing water vapor (sweat, evaporation) generated on the wound to dissipate in time, avoiding the problem of surrounding skin maceration caused by moisture accumulation, and creating a bacteria-proof, water-proof and breathable environment for the wound.

[0037] The hydrophilic layer 101 utilizes a composite of β-glucan and sodium carboxymethyl cellulose oxide to rapidly absorb exudate while avoiding adhesion to the wound surface, thus reducing pain and damage during changes. The absorbent layer 102, through the use of superabsorbent resin and alginate, can form a soft gel after achieving a large absorbency capacity, avoiding both the insufficient absorption of traditional gauze and the discomfort of hard lumps formed by pure superabsorbent resin. The outer polyurethane film effectively blocks bacteria and external contamination while maintaining breathability.

[0038] Example 2

[0039] Reference Figure 1 and Figure 2 The weight ratio of β-glucan to sodium carboxymethyl cellulose oxide is 1:4 to 1:2. To achieve this, the inventors conducted the following experiments: Experimental objective: To verify the effect of different weight ratios of β-glucan and sodium carboxymethyl cellulose on the properties of the composite hydrophilic layer and to determine the optimal ratio range.

[0040] Sample preparation: β-glucan and sodium carboxymethyl cellulose oxide were weighed separately and mixed in dry weight ratios of 1:8, 1:5, 1:4, 1:3, 1:2, and 1:1. The mixture was dissolved in deionized water and stirred until completely dissolved to form a homogeneous solution of 2% (w / v). The solution was cast onto a polytetrafluoroethylene plate and dried at 40°C for 24 hours to prepare a homogeneous composite membrane with a thickness of approximately 0.1 mm, which served as the hydrophilic layer 101 sample to be tested.

[0041] Mechanical properties: In accordance with GB / T1040.3 standard, after the membrane sample was fully swollen in physiological saline, the wet tensile strength and elongation at break were tested using a universal testing machine to evaluate its flexibility and durability in actual use environment.

[0042] Liquid management capability: The dry film weight (W0) was recorded using a weighing method. The film was completely immersed in 37°C physiological saline and removed after 30 seconds (simulating initial contact) and 10 minutes (simulating steady state). The surface free liquid was blotted dry with filter paper and then weighed (Wt). The 30-second absorption rate ((W30s-W0) / W0) and the 10-minute saturation absorption ratio ((W10min-W0) / W0) were calculated.

[0043] Moisture permeability: Refer to GB / T12704.1-2009 (cup method), and measure the water vapor permeability per unit area of ​​the membrane in 24 hours under the conditions of temperature 37℃ and relative humidity 50%.

[0044] In vitro bioactivity assessment (simulating healing potential): Cell compatibility was assessed using the CCK-8 assay. Extracts of composite membranes at various ratios were prepared (according to ISO 10993-12 standard). After co-culturing with cells for 24 hours, absorbance was measured, and the relative cell proliferation rate was calculated. Cell migration promotion was assessed using a cell scratch assay. After scratching, sample extracts were added to the culture system, and the healing rate of the scratches was observed and compared under a microscope after 24 hours to qualitatively evaluate its promoting effect on cell repair behavior.

[0045] Table 1 (Physical, liquid absorption and barrier properties of composite membranes with different ratios) Test ratio (β-glucan: sodium carboxymethyl cellulose oxide) Wet tensile strength (MPa) Elongation at break in wet state (%) Liquid aspiration rate in 30 seconds (g / g) 10-minute saturated water absorption rate (g / g) Water vapor transmission rate (g / m²·d) 1:8 0.81±0.07 23.8±1.9 0.27±0.02 15.5±0.8 2900±145 1:5 1.55±0.13 39.6±3.1 0.40±0.03 22.8±1.2 2760±135 1:4 1.65±0.14 42.5±3.3 0.41±0.03 24.2±1.3 2700±130 1:3 1.78±0.15 46.8±3.7 0.42±0.03 25.5±1.4 2660±125 1:2 1.62±0.14 40.1±3.2 0.38±0.03 22.1±1.2 2620±130 1:1 1.08±0.09 28.4±2.3 0.32±0.02 18.9±1.0 2480±150

[0046] Table 2 (In vitro bioactivity evaluation of composite membranes with different ratios) Test ratio (β-glucan: sodium carboxymethyl cellulose oxide) Relative cell proliferation rate (RGR, %) Cellular scratch healing promotion effect (qualitative, 24h) 1:8 98% Weak, similar to the blank control group 1:5 107% Significantly improved, scratch width significantly reduced. 1:4 110% Significantly promotes healing and results in a large healing area. 1:3 115% Significantly promotes healing, scratches almost completely heal. 1:2 105% Significantly promote 1:1 97% Slightly promote

[0047] As shown in Tables 1 and 2, the wet tensile strength and elongation at break reached their highest values ​​(1.78 MPa, 46.8%) at a ratio of 1:3, and remained at a significantly higher level than the two comparative points (1:8 and 1:1) throughout the 1:4 to 1:2 range. This demonstrates that within this specific ratio range, the rigid chain of β-glucan and the flexible chain of sodium carboxymethyl cellulose oxidase form an optimal interpenetrating polymer network structure, producing a reinforcing effect that surpasses simple mixing.

[0048] Within this range, the material exhibits both a high initial liquid absorption rate (facilitating rapid drainage) and a suitable saturated water absorption capacity (avoiding excessive swelling), while maintaining excellent water vapor transmission rate (approximately 2600-2700 g / m³). 2 (d) achieves an ideal balance of rapid absorption, moderate water retention, and breathability.

[0049] Cellular experiments showed that the composite membrane exhibited optimal cell compatibility in the 1:4 to 1:2 range and significantly promoted fibroblast migration, a property crucial for accelerating wound epithelialization. The enhanced bioactivity and peak physical properties occurred within the same range, further confirming the synergistic benefits of this ratio range.

[0050] When the ratio is less than 1:4 (e.g., 1:8), the material properties are close to those of pure sodium carboxymethyl cellulose oxide, and the wet strength is too low to meet the requirements for dressing use. When the ratio is greater than 1:2 (e.g., 1:1), the excessive entanglement of β-glucan molecular chains leads to brittle membranes, decreased liquid absorption rate, and no corresponding improvement in biological activity.

[0051] Furthermore, the water absorption ratio of the adsorbent layer 102 is 20 to 35 times its own weight. The test was conducted according to the "Water Absorption Determination Method" in pharmaceutical industry standards (such as the Chinese Pharmacopoeia or YY / T0471.1-2004). Specifically, a small piece of dry adsorbent core layer (weight denoted as W0) was accurately weighed and completely immersed in sufficient physiological saline. After a period of time (e.g., 30 minutes), excess water was drained off using a sieve, and the weight was recorded as W1. Through testing multiple batches of samples with different superabsorbent resin / alginate ratios, we found that when the composite ratio was optimized, its water absorption ratio stably fell within the range of 20 to 35 times. Its lower limit of 20 times was clearly superior to traditional alginate dressings (15 times), reflecting the starting point of technological progress. The upper limit of 35 times was significantly lower than pure superabsorbent resin, but this was intentional; we sacrificed some of the maximum water absorption capacity in exchange for a better gel morphology and clinical applicability. Specific experimental data are shown in Table 4.

[0052] Table 3 shows a comparison of the water absorption ratio and gel properties of different core layer formulations. Test standards: Refer to the pharmaceutical industry standard YY / T0471.1-2004 (Test methods for contact wound dressings) or the relevant methods in the Chinese Pharmacopoeia.

[0053] Test fluid: 0.9% physiological saline, to simulate the environment of human wound exudate; Test process: 1. Cut the sample into the specified size (e.g., 5cm×5cm) and dry it in an oven at 60℃ until constant weight, then accurately weigh its dry weight (W0).

[0054] 2. Completely immerse it in an excess of physiological saline and let it stand at room temperature for 30 minutes to ensure full swelling.

[0055] 3. Use tweezers to remove the dressing and lay it flat on a clean, suspended stainless steel screen. Let it drain for 5 minutes to remove any loose water.

[0056] 4. Use a weighing bottle to quickly collect and weigh the wet weight (W1) of the drained dressing.

[0057] Calculation formula: Water absorption ratio (g / g) = (W1-W0) / W0.

[0058] Table 3 Group Core layer main components (SAP: alginate: other) Average water absorption ratio (g / g) Evaluation of the physical properties of the gel (after absorption) Whether it falls within the scope of this invention (20-35 times) Comparative Example 1 0:100:0 (pure alginate) 16.5±1.2 It forms a soft but low-strength gel that is easily broken. no Comparative Example 2 100:0:0 (Pure SAP powder) 152.3±8.5 It forms a hard, opaque lump with a gritty feel. no Example 1 20:80:0 22.8±1.5 A soft and elastic gel with an intact structure. yes Example 2 35:65:0 28.4±1.8 A soft and elastic gel with an intact structure and optimal properties. yes Example 3 50:50:0 33.1±2.0 The gel has moderate elasticity, is slightly firm, but is still within an acceptable range. yes Comparative Example 3 65:35:0 41.5±2.5 The gel hardened noticeably and began to feel gritty, like pure SAP, resulting in poor comfort. no Example 4 40:55:5 (Contains 5% cellulose fiber) 26.2±1.6 Soft and elastic gel yes

[0059] As shown in Table 3, Comparative Example 1 (16.5 times) represents the technical level of traditional alginate dressings, which have insufficient water absorption capacity and cannot meet the needs of highly exudative wounds. This invention significantly improves the absorption capacity (lower limit 20 times) by introducing SAP. Comparative Examples 2 and 3 (152.3 times and 41.5 times) show that when the SAP content is too high, although the water absorption ratio is very high, the material loses the softness and gel conformity required as a wound dressing. The hard lumps formed after absorption will compress the wound and cause patient discomfort. Therefore, this invention sets an upper limit of 35 times to prioritize the comfort and safety of clinical use.

[0060] The absorbent layer 102 is composed of superabsorbent polymer (SAP) and alginate. Superabsorbent polymer has an extremely strong water absorption capacity, up to hundreds of times its weight, but it easily forms a hard gel block after absorption, resulting in poor comfort and potential backflow. Alginate dressings have a water absorption ratio of approximately 15-20 times and are one of the mainstream products on the market. The purpose of combining superabsorbent polymer and alginate is to obtain a core layer that has strong absorption capacity but is not too hard and can maintain good gel elasticity.

[0061] The adsorption layer 102 can form a gel after absorbing physiological saline. In laboratory tests, we use artificially prepared physiological saline (0.9% sodium chloride aqueous solution) to simulate the ionic environment of human wound exudate. Physiological saline is chosen because its osmotic pressure is similar to that of human blood and tissue fluid, and the data obtained from testing with it has the most clinical reference value. If only pure water is used for testing, the data will deviate from the actual situation (especially for ion-sensitive materials such as alginate).

[0062] Furthermore, it also includes an outermost adhesive tape layer 104 and a backing layer 105. The adhesive tape layer 104 and the backing layer 105 are connected, and the adhesive tape layer 104 and the backing layer 105 wrap the hydrophilic layer 101, the absorbent layer 102, and the breathable layer 103. The adhesive tape layer 104 is used for the adhesion of the dressing patch 100 to the patient's body, and the backing layer 105 is used to protect the adhesive part of the adhesive tape layer 104, ensuring that the adhesive tape layer 104 can adhere to the patient's body when the backing layer 105 is peeled off, thereby fixing the dressing patch 100 to the patient's body.

[0063] Example 3

[0064] Reference Figures 3-6 An auxiliary device for a dressing patch 100 for wound care includes two fixing rings 200 connected by a conduit 201, and a roll 202 connected to one of the fixing rings 200. An air control unit 300 is provided on the roll 202. The air control unit 300 includes a first sealing component 301 fixedly installed inside the roll 202 and a second sealing component 302 movably installed inside the roll 202, as well as a drive component 303 connected to the second sealing component 302.

[0065] The drive component 303 drives the second sealing component 302 to move back and forth, causing the first inflation component to open and close, which in turn causes the fixing ring 200 to expand or contract, so that the fixing ring 200 presses the adhesive layer 104 tightly, avoiding the problem that the adhesive tape may lose its stickiness and cause the dressing to shift or fall off when the patient sweats a lot or wears it for a long time.

[0066] Among them, wound dressings used for chronic wounds (such as diabetic foot ulcers and pressure sores) need to be stably covered on the wound for a long time to provide effective protection. However, for patients with excessive sweating or long-term application, the adhesiveness of the adhesive layer 104 is prone to failure, causing the dressing to shift or fall off. In addition, repeated application and tearing of the tape can easily cause contact dermatitis and damage the surrounding healthy skin, which is particularly unfriendly to elderly patients or patients with fragile skin. Therefore, an auxiliary device for wound care dressing patch 100 is proposed, mainly for patients' hands and legs. In this embodiment, the adhesive layer 104 may not be adhesive, and only normal cloth is needed. When the dressing patch 100 is covered on the wound, the dressing patch 100 is fixed by pressing the edges of the dressing patch 100 with two fixing rings 200.

[0067] Example 4

[0068] Reference Figures 4-6 The first sealing component 301 includes a ring 301a fixedly disposed inside the drum 202. A sealing plug 301b is provided at the through hole of the ring 301a. The sealing plug 301b is connected to the ring 301a through a spring piece 301c.

[0069] In this embodiment, the second sealing component 302 may not be provided. When the two fixing rings 200 are placed in the appropriate position on the patient's hand or leg, the roll 202 can be directly inflated by the external inflation component. Under the action of air pressure, the sealing plug 301b on the first sealing component 301 is pushed open, and gas enters one of the fixing rings 200 and the conduit 201, causing the two fixing rings 200 to expand simultaneously and fix the dressing patch 100. When the two fixing rings 200 apply sufficient pressure to the dressing patch 100, the external inflation component is released. Under the elastic force of the spring 301c, the sealing plug 301b is reset, blocking the gap and preventing gas from flowing out.

[0070] Example 5

[0071] Reference Figures 4-6 The second sealing component 302 has the same structure as the first sealing component 301, and the ring 301a in the second sealing component 302 is movably disposed inside the drum 202.

[0072] Furthermore, the drive assembly 303 includes a handle connected to the annulus 301a of the second closure assembly 302, the handle being used to drive the second closure assembly 302 to move inside the drum 202.

[0073] Furthermore, a first air port 202a is provided on one side of the drum 202, and a first piston 202b is provided at the first air port 202a. The first air port 202a is located between the first sealing component 301 and the fixing ring 200.

[0074] In this embodiment, the conventional external inflation is directly applied to the drum 202. By pressing down the handle, the handle drives the piston of the second sealing component 302 to descend. At this time, the sealing plug 301b on the piston of the second sealing component 302 closes, and the piston of the second sealing component 302 compresses the air between it and the first sealing component 301. Under the action of air pressure, the piston of the first sealing component 301 is pushed open. When the handle drives the piston of the second sealing component 302 to rise, the piston on the first sealing component 301 is driven by the spring plate 301c to block the gap. There is a negative pressure between the first sealing component 301 and the second sealing component 302. Under the negative pressure, the piston of the second sealing component 302 opens, and at the same time, the spring plate 301c of the second sealing component 302 deforms. Outside air enters between the second sealing component 302 and the first sealing component 301 through the gap of the second sealing component 302. This process is repeated to inflate the fixing ring 200.

[0075] When the inflation is too tight, manually loosen the first piston 202b so that the first piston 202b no longer blocks the first air port 202a, thereby allowing the gas inside the fixing ring 200 to flow out, so that the fixing ring 200 loosens its fixation to the dressing patch 100. This can avoid the strong discomfort caused by the fixing ring 200 being too tight on the patient, and also facilitates the removal of the fixing ring 200.

[0076] Compared to traditional medical tape and elastic rope binding, our invention can achieve precise control, avoiding overly tight wrapping that can hinder local blood circulation, causing limb swelling, numbness, or even new pressure sores. If the wrapping is too loose, it cannot be effectively fixed, and the dressing is prone to slipping.

[0077] Example 6

[0078] Reference Figures 4-6 The air control unit 300 also includes a lifting assembly 304 connected to the fixed ring 200. The lifting assembly 304 includes an air cushion 304a communicating with the fixed ring 200. A second piston 304b is provided at the connection between the air cushion 304a and the fixed ring 200. In the initial state, the second piston 304b blocks the air cushion 304a and the fixed ring 200. When the second piston 304b is slightly pulled out, the gas inside the fixed ring 200 can enter the air cushion 304a. When it is completely pulled out, the gas inside the air cushion 304a and the fixed ring 200 can be discharged, further increasing the exhaust speed.

[0079] In its initial state, the air cushion 304a resembles an uninflated balloon. When the two fixation rings 200 are secured around the patient's wound, the adhesive layer 104 of the dressing patch 100 is attached to the tops of the two air cushions 304a on the two fixation rings 200. Although there is a small, controlled separation space (i.e., the thickness of the air cushion 304a) between the center of the dressing and the center of the wound, this in itself helps to reduce adhesion and improve breathability.

[0080] When the second piston 304b is pulled out, some of the gas inside the retaining ring 200 flows into the air cushion 304a, slowly inflating the air cushion 304a. The air cushion 304a then lifts the dressing patch 100, causing the center part of the dressing to separate from the wound instead of sticking tightly to it. At this point, medical staff can easily and painlessly remove the dressing, avoiding the pain and secondary damage of "tearing off adhesive tape" in the traditional method.

[0081] Example 7

[0082] A method for using a dressing patch 100 for wound care is proposed, including the following steps: 1. Cover the wound with the dressing patch 100, so that its hydrophilic layer 101 contacts the wound.

[0083] 2. Place at least one retaining ring 200 around the outer periphery of the dressing patch 100.

[0084] 3. Operate the air control unit 300 to inflate the fixing ring 200, causing the fixing ring 200 to expand. The contraction force generated after the expansion compresses and fixes the edge of the dressing patch 100.

[0085] 4. When it is necessary to change the dressing, operate the air control unit 300 to release the air from the fixing ring 200 to relieve the pressure, and then separate the fixing ring 200 from the dressing patch 100.

[0086] By attaching an inflatable and deflated fixing ring 200 around the outer periphery of the dressing patch 100, physical fixation is achieved by utilizing the elastic contraction force after inflation, replacing the traditional adhesive fixation method. This fundamentally avoids skin allergies and tearing damage caused by adhesive tape. At the same time, the operation method of inflation and deflation makes the adjustment of fixation force more precise and controllable, and the dressing change process is simpler and painless, significantly improving the safety of nursing operations and patient comfort.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dressing patch (100) for wound care, characterized in that: Including those arranged in layers from the inside out: The hydrophilic layer (101) is composed of a mixture of β-glucan and sodium oxidized carboxymethyl cellulose fibers; The adsorption layer (102) is composed of a superabsorbent resin and alginate. The breathable layer (103) is a polyurethane film.

2. The dressing patch (100) for wound care as described in claim 1, characterized in that: The weight ratio of β-glucan to sodium oxidized carboxymethyl cellulose is 1:4 to 1:

2.

3. The dressing patch (100) for wound care as described in claim 1, characterized in that: The adsorption layer (102) has a water absorption ratio of 20 to 35 times its own weight, and can form a gel after absorbing physiological saline.

4. The dressing patch (100) for wound care as described in any one of claims 1 to 3, characterized in that: It also includes an outermost adhesive tape layer (104) and a backing layer (105), which are connected to each other, and the adhesive tape layer (104) and the backing layer (105) wrap a hydrophilic layer (101), an adsorption layer (102) and a breathable layer (103).

5. An auxiliary device for a dressing patch (100) for wound care, used in the dressing patch (100) for wound care as described in claims 1-4, characterized in that: include, At least two fixing rings (200) are provided, the two fixing rings (200) are connected by a conduit (201), and a drum (202) is connected to one of the fixing rings (200). The retaining ring (200) is fitted around the outer periphery of the dressing patch (100); An air control unit (300) is located inside the drum (202). The air control unit (300) includes a first sealing component (301) fixedly installed inside the drum (202) and a second sealing component (302) movably installed inside the drum (202), as well as a drive component (303) connected to the second sealing component (302).

6. The dressing patch (100) auxiliary device for wound care as described in claim 5, characterized in that: The first sealing component (301) includes a ring (301a), and a sealing plug (301b) is provided at the through hole of the ring (301a). The sealing plug (301b) is connected to the ring (301a) through a spring piece (301c).

7. The dressing patch (100) auxiliary device for wound care as described in claim 6, characterized in that: The second sealing component (302) has the same structure as the first sealing component (301), and the ring (301a) in the second sealing component (302) is movably disposed inside the drum (202).

8. The dressing patch (100) auxiliary device for wound care as described in any one of claims 5 to 7, characterized in that: The drum (202) has a first air port (202a) on one side, and a first piston (202b) is provided at the first air port (202a). The first air inlet (202a) is located between the first sealing component (301) and the fixing ring (200).

9. The dressing patch (100) auxiliary device for wound care as described in claim 8, characterized in that: The air control unit (300) also includes a lifting assembly (304) connected to the fixing ring (200). The lifting assembly (304) includes an air cushion (304a) communicating with a fixed ring (200), and a second piston (304b) is provided at the connection between the air cushion (304a) and the fixed ring (200).

10. A method of using a dressing patch (100) for wound care, characterized in that: Includes the following steps: Cover the wound with a dressing patch (100) so that its hydrophilic layer (101) contacts the wound; At least one retaining ring (200) is fitted onto the outer periphery of the dressing patch (100); The air control unit (300) inflates the fixing ring (200) to expand the fixing ring (200), and uses the contraction force generated after the expansion to compress and fix the edge of the dressing patch (100); When the dressing needs to be changed, the air control unit (300) is operated to release the pressure from the retaining ring (200), and then the retaining ring (200) is separated from the dressing patch (100).

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