A dressing device to assist skin repair

Abstract

The application relates to the technical field of medical auxiliary devices, in particular to a dressing device for assisting skin repair, which comprises a sticking layer, a dressing window is formed in the sticking layer, a supporting ring is fixedly connected to the dressing window, a protective cover is detachably clamped on the top of the supporting ring; a dressing fixing piece is fixedly connected in the protective cover, the dressing fixing piece comprises, from top to bottom, a pressing air bag and an expansion connecting air bag in sequence, the pressing air bag and the expansion connecting air bag are communicated with each other, a dressing layer is arranged at the bottom of the pressing air bag, a connecting groove corresponding to the expansion connecting air bag is formed in the bottom of the inner side wall of the supporting ring, a pressure fixing piece is arranged on the dressing fixing piece, and the pressure fixing piece is vertically slidably connected with the protective cover through a pressing type elastic self-locking sliding pair. The dressing layer can be self-adaptively adjusted according to the dynamic deformation of the skin, and the stability of the dressing fixing structure can be maintained by arranging the mutually-communicated pressing air bag and expansion connecting air bag.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, specifically to a dressing device for assisting skin repair. Background Technology

[0002] Medical skin repair dressings primarily protect wounds by forming a physical barrier on the skin surface and maintaining a moist environment. They are suitable for non-chronic wounds such as acne, dermatitis, and eczema, as well as the care of the surrounding skin.

[0003] In the prior art, for example, Chinese patent document with publication number CN217366316U proposes a replaceable hydrogel dressing. The dressing structure is designed to reduce the risk of secondary contamination of the wound and skin damage by setting a fixing component consisting of a waterproof isolation layer, a fixing support layer and a fixing adhesive layer, and a replacement component that is movably connected thereto.

[0004] However, this type of structure still has limitations in practical applications: the interfacial adhesion between its adhesive layer and the skin fails to adequately adapt to the biomechanical characteristics of the skin under dynamic conditions; specifically, when the adhesive direction of the adhesive layer intersects perpendicularly with the skin's inherent tension lines, the continuous contractile tension of the skin is transformed into periodic mechanical stress acting on the edge of the adhesive layer. Repeated loading of this stress leads to stress concentration at the edge of the adhesive layer, eventually causing interfacial peeling and edge lifting, thereby compromising the stability of the dressing's adhesion to the skin and the integrity of the wound seal. Therefore, it is necessary to propose a dressing device that assists in skin repair, inhibiting edge peeling caused by periodic contractile stress to maintain the stability of the dressing's adhesion to the skin and ensure the efficacy of the dressing in repairing the skin. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a dressing device for assisting skin repair. By setting interconnected pressing and bonding components and connecting and fixing components, the compressive force of the dressing on the wound surface can be adaptively adjusted according to the dynamic deformation of the skin, thereby maintaining the stability of the dressing fixation structure.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a dressing device for assisting skin repair, comprising an adhesive layer, a dressing window on the adhesive layer, a cylindrical support ring fixedly connected to the dressing window, and a protective cover detachably snapped onto the top of the support ring;

[0007] The protective cover is fixedly connected with a dressing fastener. The dressing fastener includes a pressure airbag and an expansion connecting airbag from top to bottom. The pressure airbag and the expansion connecting airbag are connected to each other. The bottom of the pressure airbag is provided with a dressing layer. The bottom of the inner side wall of the support ring is provided with a corresponding connecting groove for the expansion connecting airbag. The expansion connecting airbag is located in the connecting groove.

[0008] The dressing fixation component is equipped with a pressure-applying fixing component, which is vertically slidably connected to the protective cover through a press-type elastic self-locking sliding pair. When the pressure-applying fixing component is locked inside the protective cover, it applies pressure to the top surface of the pressure airbag. After the sliding limit of the pressure-applying fixing component and the protective cover is unlocked, the patient can remove the protective cover to replace the dressing layer.

[0009] The technical principle of the above solution is as follows: A multi-layer structure is constructed through the detachable connection between the adhesive layer and the protective cover to achieve stable fixation and replaceability of the dressing; the adhesive layer adheres to the skin surface to form an initial fixation base, and a support ring provides an installation interface for the detachable protective cover; the dressing fixation component built into the protective cover includes interconnected pressure airbags and expansion connecting airbags. The bottom of the pressure airbags supports the dressing layer, and the expansion connecting airbags are housed in the connecting grooves on the inner wall of the support ring; the pressure-applying fixing component is connected to the protective cover through a press-type elastic self-locking sliding pair. When locked inside the protective cover, it applies continuous pressure to the pressure airbags, causing the dressing layer to adhere to the wound surface; when the skin undergoes dynamic deformation, the gas flow between the expansion connecting airbags and the pressure airbags can adaptively adjust the fixing force, maintaining stable contact between the dressing layer and the skin interface; after the pressure-applying fixing component is unlocked, the protective cover can be removed entirely to allow for independent replacement of the dressing layer.

[0010] The above approach has the following beneficial effects:

[0011] 1. This solution uses interconnected pressure airbags and expansion connecting airbags to enable the dressing layer to adaptively adjust its pressure on the wound surface in response to dynamic skin deformation. When skin stretching causes adaptive deformation of the adhesive layer, the expansion connecting airbag is driven by pressure to migrate the gas to the pressure airbag, enhancing the pressure of the pressure airbag on the dressing layer, resisting shear and peeling stresses generated by skin movement, inhibiting dressing edge lifting, and maintaining the structural stability of the dressing fixation and the integrity of the wound seal.

[0012] 2. This solution achieves functional decoupling between the dressing layer and the fixing components through the detachable snap-fit ​​connection between the protective cover and the support ring, and the press-type elastic self-locking sliding connection between the pressure fixing component and the protective cover. When the dressing needs to be replaced, the dressing layer can be replaced independently simply by unlocking the pressure fixing component and removing the protective cover, without having to remove the adhesive layer, thus reducing the risk of secondary contamination of the wound surface caused by repeated removal operations.

[0013] 3. This solution uses a press-type elastic self-locking sliding pair to lock and unlock the pressure-fixed component. When changing the dressing layer, there is no need to remove the adhesive layer that is in direct contact with the skin, which reduces the medical adhesive-related skin damage caused by peeling force during the overall removal of traditional dressings. It is especially suitable for patients with fragile skin or chronic wounds who need to change dressings frequently.

[0014] Furthermore, the protective cover has a spherical crown-shaped structure.

[0015] Beneficial effects: The spherical protective cover, with its curved shape, forms a geometric fit with the surface of human skin, allowing the adhesive layer to conform evenly to the natural curvature of the skin during application. This reduces local stress concentration caused by surface mismatch, improves the initial fit between the adhesive layer and the skin interface and the conformity of long-term wear, and reduces the risk of edge lifting due to shape differences.

[0016] Furthermore, the coverage area of ​​the protective cover is greater than that of the adhesive layer.

[0017] Beneficial effects: During patient activity, the protective cover will preferentially come into contact with clothing or other external objects, reducing the probability of the adhesive layer edge being directly scratched or sheared, resulting in curling and peeling, and maintaining the structural stability of the dressing fixation.

[0018] Furthermore, the protective cover is made of an elastic material and is initially subjected to a pre-tightening stress pointing radially inward.

[0019] Beneficial effects: The application of pre-tightening force, through the elastic recovery of the protective cover itself, continuously acts on the support ring and adhesive layer, so that the protective cover always tends to shrink towards the skin surface, ensuring that the dressing layer always maintains a tight fit under dynamic conditions.

[0020] Furthermore, the inflatable connecting airbag has a ring-shaped structure.

[0021] Beneficial effects: The expansion connecting airbag and the connecting groove are adapted to each other. When the airbag is inflated, the expansion connecting airbag and the inner wall of the connecting groove form a uniform locking and limiting around the entire circumference. The compressive stress of the pressure airbag is distributed at multiple points in the circumference, which enhances the connection stability between the protective cover and the support ring. At the same time, the annular sealing contact effectively prevents external pollutants from penetrating into the dressing area.

[0022] Furthermore, the pressure-applying component includes a push button in the shape of a dressing window, the bottom of which can fit against the top surface of the pressure airbag.

[0023] Beneficial effects: When the button is locked, it applies uniform surface contact pressure to the pressure airbag, reducing the probability of deformation of the pressure airbag or uneven compression of the dressing layer due to local stress concentration. At the same time, this button design makes it easy for the operator to complete the pressing and locking actions with one hand, improving the convenience of dressing replacement.

[0024] Furthermore, the adhesive layer is a gradually thickening curved surface structure with a center thickness greater than the edge thickness.

[0025] Beneficial effects: In this design, the edge area of ​​the adhesive layer forms a gently transitioning slope due to the decreasing thickness. When an external object comes into contact with the edge of the dressing, the slope structure decomposes the initial scraping force generated at the contact point into a component force along the slope direction, reducing the peak peel stress acting on the edge of the adhesive layer; reducing edge lifting and curling failure of the dressing during dynamic use.

[0026] Furthermore, a ventilation window is provided on the button, and a plug is detachably and snapped onto the ventilation window.

[0027] Beneficial effects: By installing different plugs, the gas exchange state between the inside of the button and the external environment can be switched and controlled, thereby realizing the on-demand adjustment of humidity and oxygen permeability of the dressing area to meet the needs of different wound types or repair stages for microenvironment gas exchange and optimize skin repair conditions.

[0028] Furthermore, the plug includes a vent plug with several vent holes.

[0029] Beneficial effects: By replacing the breathable plugs with different pore sizes or porosities, the gas exchange rate between the inside of the press button and the external environment can be preset in a personalized way, so as to realize individualized control of the humidity and oxygen permeability of the dressing area (bottom of the pressure air bladder), enabling clinical medical staff to flexibly adjust the dressing microenvironment according to factors such as the degree of wound exudation and healing stage.

[0030] Furthermore, the plug includes a sealing plug, and the push button is also provided with symmetrical negative pressure windows. A one-way valve is fixedly connected to the push button at the corresponding negative pressure window. The one-way valve only allows the gas in the negative pressure window to flow outward.

[0031] There is a negative pressure chamber between the protective cover and the adhesive layer, and the space at the bottom of the button is connected to the negative pressure chamber.

[0032] Beneficial effects: When the button is pressed and locked, the gas in the negative pressure chamber is discharged outward through the one-way valve, and the sealing plug prevents external gas from entering. After the button is locked, a continuous and stable negative pressure state is formed in the negative pressure chamber. This negative pressure causes the protective cover to have an adsorption force on the skin surface, enhancing the tightness of the fit between the protective cover and the adhesive layer, and allowing the protective cover to participate in the adhesion and fixation of the dressing layer.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the dressing device for assisting skin repair according to the present invention;

[0035] Figure 2 This is an isometric view showing the separation of the adhesive layer and the protective cover in an embodiment of the dressing device for assisting skin repair according to the present invention;

[0036] Figure 3 This is an isometric sectional view of the protective cover after installation in an embodiment of the dressing device for assisting skin repair according to the present invention;

[0037] Figure 4 for Figure 3 A magnified view of the dressing fixation components at point A in the diagram;

[0038] Figure 5 This is an isometric view of the air-permeable plug during installation in an embodiment of the dressing device for assisting skin repair according to the present invention;

[0039] Figure 6 This is an isometric view of the sealing plug during installation in an embodiment of the dressing device for assisting skin repair according to the present invention;

[0040] Figure 7 This is an axonometric sectional view of the push button with a sealing plug connected to the adhesive layer in an embodiment of the dressing device for assisting skin repair according to the present invention.

[0041] The reference numerals in the accompanying drawings of the instruction manual include: 1. Adhesive layer; 2. Dressing window; 3. Support ring; 4. Protective cover; 5. Dressing fastener; 501. Pressure airbag; 502. Expansion connection airbag; 6. Dressing layer; 7. Connecting groove; 8. Press button; 9. Ventilation window; 10. Ventilation plug; 11. Ventilation hole; 12. Sealing plug; 13. Negative pressure window; 14. One-way air valve; 15. Negative pressure chamber. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following detailed description illustrates the specific implementation method:

[0046] Example 1:

[0047] This embodiment provides a dressing device to assist in skin repair, specifically as follows: Figure 1 and Figure 2 As shown, it includes an adhesive layer 1 (the adhesive layer 1 is preferably made of silicone pressure-sensitive gel material), an adhesive window 2 is provided on the adhesive layer 1, and a cylindrical support ring 3 is provided on the adhesive window 2 (the inner edge of the adhesive layer 1 near the adhesive window 2 is attached to the support ring 3, forming a fixed connection between the adhesive layer 1 and the support ring 3); with this structure, when the adhesive layer 1 is applied to the patient's skin surface, the support ring 3 is indirectly fixed to the skin through the adhesive layer 1.

[0048] Specifically, the top of the support ring 3 is detachably fitted with a protective cover 4; a dressing fixator 5 is fixedly connected inside the protective cover 4, thus securing the dressing to the patient's wound to aid skin repair. Simultaneously, the detachable connection of the protective cover 4 allows the dressing to be removed and replaced without peeling off the adhesive layer 1. (Specific combination...) Figure 2 , Figure 3 and Figure 4 As shown:

[0049] The dressing fixation component 5, from top to bottom, includes a pressure airbag 501 and an expansion connecting airbag 502, which are interconnected. Regarding dressing fixation: the pressure airbag 501 has a dressing layer 6 at its bottom (the dressing layer 6 is preferably made of cellulose-based materials, chitosan and its derivatives, and polylactic acid; this dressing layer 6 is biodegradable and can naturally degrade after fulfilling its dressing function, exhibiting environmentally friendly characteristics). The pressure airbag 501 uses the cavity formed by its bottom and the expansion connecting airbag 502 to position the dressing layer 6, maintaining a stable fit between the dressing layer 6 and the patient's skin. Regarding the connection of the fixed dressing... The bottom of the inner wall of the support ring 3 is provided with a corresponding expansion connecting airbag 502. The expansion connecting airbag 502 is located in the connecting groove 7 (the expansion connecting airbag 502 is a circular structure). When the expansion connecting airbag 502 is inflated in the connecting groove 7, it forms a locking and limiting relationship with the connecting groove 7, thereby ensuring that the pressure airbag 501 can provide a continuous and stable pressure on the dressing layer 6. The circular expansion connecting airbag 502 can disperse the pressure stress of the pressure airbag 501 at multiple points in the circumference of the connecting groove 7, enhance the connection stability between the protective cover 4 and the support ring 3, and also block and reduce the risk of external contaminants penetrating into the dressing area.

[0050] In addition, to improve the ease of replacement of dressing layer 6, such as Figure 3 As shown, in this embodiment, a pressure-fixing component is provided on the pressure airbag 501. The pressure-fixing component includes a push button 8 corresponding to the shape of the dressing window 2. The bottom of the push button 8 can fit against the top surface of the pressure airbag 501. The push button 8 and the protective cover 4 are vertically slidably connected through a push-type elastic self-locking sliding pair (the push-type elastic self-locking sliding pair includes a guide sliding member opened on the protective cover 4, an elastic reset member located inside the protective cover 4, and a rotation locking mechanism). When the push button 8 is locked inside the protective cover 4, its bottom presses against the top surface of the pressure airbag 501 to compress the pressure airbag 501 and continuously fix the dressing layer 6. When the sliding limit between the push button 8 and the protective cover 4 is unlocked, the operator can remove the protective cover 4 along with the push button 8 to achieve independent replacement of the dressing layer 6.

[0051] Based on the above-mentioned dressing positioning and fixing method, when the button 8 is locked in the protective cover 4, the dressing layer 6 is attached to the patient's skin surface. When the adhesive layer 1 undergoes adaptive deformation due to the elasticity of the skin, the air pressure inside the expansion connecting airbag 502 first increases due to the deformation of the connecting groove 7, thereby guiding the gas to flow into the pressure airbag 501, causing the pressure airbag 501 to expand to enhance the pressure and fixation effect of the pressure airbag 501 on the dressing layer 6, and realizing the effect of adaptive adjustment of the pressure force of the bottom of the pressure airbag 501 on the dressing layer 6 with the deformation of the skin. When the skin returns to a relaxed state, part of the gas medium in the pressure airbag 501 flows back into the expansion connecting airbag 502, restoring the initial air pressure distribution. This invention enables the dressing layer 6 to dynamically and steadily adjust its adhesion to the patient's skin in real time, adapting to the stretching and contraction of the skin. This reduces the impact of shear and peeling stress caused by skin activity on the adhesion stability of the dressing layer 6, ensuring the continuous and uniform release of active pharmaceutical ingredients and their transdermal absorption efficiency. Furthermore, it reduces the probability that repeated stretching and contraction of the skin will affect the adhesion stability of the adhesive layer 1.

[0052] Among them, the structural design of the protective cover 4, such as Figure 2 and Figure 3 As shown: The protective cover 4 has a spherical crown-shaped structure. The curved shape of the protective cover 4 can geometrically adapt to the surface of human skin, allowing the adhesive layer 1 to uniformly conform to the natural curvature of the skin during application. This reduces local stress concentration caused by surface mismatch, improves the initial adhesion between the adhesive layer 1 and the skin interface, and enhances the conformity of long-term wear. The coverage area of ​​the protective cover 4 is larger than that of the adhesive layer 1. The portion of its outer edge extending beyond the adhesive layer 1 forms a circumferentially extending shielding structure. During patient activity, it can preferentially come into contact with clothing or other external objects, thereby reducing the probability of the adhesive layer 1 being directly scraped or sheared, resulting in edge curling and peeling, and maintaining the structural stability of the dressing. The protective cover 4 is made of elastic material. In its initial state, the protective cover 4 is subjected to a pre-tightening stress pointing radially inward. This pre-tightening force continuously acts on the support ring 3 and the adhesive layer 1, causing the protective cover 4 to always tend to contract towards the skin surface, resisting the peeling force generated by limb movement, enhancing the compressive stability of the dressing layer 6 and the patient's skin interface, and ensuring that the dressing layer 6 always maintains a tight fit under dynamic conditions.

[0053] Special such as Figure 3As shown, the adhesive layer 1 is a gradually thickening curved structure with a center thickness greater than the edge thickness; the thickness of the adhesive layer 1 decreases to form a gently transitioning slope; when an external object (such as clothing) comes into contact with the edge of the dressing, the adhesive layer 1 with this slope structure decomposes the initial scraping force generated at the contact point into a component force along the slope direction, thereby effectively reducing the peak peel stress acting on the edge of the adhesive layer 1; at the same time, the edge area with the gradually thinning design has a smaller thickness, and the bending moment generated by it when subjected to friction is lower than that of the adhesive layer 1 with the same thickness, reducing the interface stress concentration caused by local bending deformation, thereby inhibiting the micro-peeling between the edge of the adhesive layer 1 and the skin.

[0054] Example 2:

[0055] like Figure 5 As shown, the difference from Embodiment 1 is that the press button 8 is provided with a ventilation window 9, and the press button 8 is equipped with a detachable and snap-fit ​​plug cover through the ventilation window 9; wherein, the plug cover includes a ventilation plug 10, and the ventilation plug 10 is provided with a plurality of ventilation holes 11; by replacing the ventilation plug 10 with different pore sizes or porosities, the gas exchange rate between the inside of the press button 8 and the external environment can be adjusted as needed, so as to realize individualized control of the humidity and oxygen permeability of the dressing area, so as to meet the needs of different wound types or repair stages for microenvironment gas exchange and optimize skin repair conditions.

[0056] Example 3:

[0057] As attached Figure 6 and Figure 7 As shown, the difference between this embodiment and embodiment 2 is that: the plug includes a sealing plug 12, and the button 8 is also provided with a symmetrical negative pressure window 13. A one-way air valve 14 corresponding to the negative pressure window 13 is fixedly connected to the button 8; there is a negative pressure chamber 15 between the protective cover 4 and the adhesive layer 1, and the space at the bottom of the button 8 is connected to the negative pressure chamber 15.

[0058] When the button 8 is pressed (i.e., after replacing the dressing layer 6, the button 8 is pressed to lock it), the gas in the negative pressure chamber 15 is discharged outward through the one-way valve 14, while the sealing plug 12 blocks the entry of external gas through the vent window 9. Thus, after the button 8 is locked, a continuous and stable negative pressure state is formed in the negative pressure chamber 15. This negative pressure causes the protective cover 4 to have an adsorption force on the skin surface, enhancing the tightness of the fit between the protective cover 4 and the adhesive layer 1 (so that the protective cover 4 also participates in the adhesion and fixation of the dressing layer 6), improving the overall stability of the dressing device under dynamic conditions, and reducing the displacement or edge peeling of the dressing layer 6 caused by skin movement.

[0059] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dressing device for assisting skin repair, characterized in that, Includes an adhesive layer (1), on which a dressing window (2) is provided, and a cylindrical support ring (3) is fixedly connected to the dressing window (2), and a protective cover (4) is detachably snapped onto the top of the support ring (3). The protective cover (4) is fixedly connected with a dressing fastener (5). The dressing fastener (5) includes a pressure airbag (501) and an expansion connecting airbag (502) from top to bottom. The pressure airbag (501) and the expansion connecting airbag (502) are connected to each other. The pressure airbag (501) has a dressing layer (6) at the bottom. The inner side wall of the support ring (3) has a corresponding connecting groove (7) for the expansion connecting airbag (502). The expansion connecting airbag (502) is located in the connecting groove (7). The dressing fixation component (5) is provided with a pressure fixing component. The pressure fixing component and the protective cover (4) are vertically slidably connected by a press-type elastic self-locking sliding pair. When the pressure fixing component is locked inside the protective cover (4), the pressure fixing component applies pressure to the top surface of the pressure airbag (501). After the sliding limit of the pressure fixing component and the protective cover (4) is unlocked, the patient can remove the protective cover (4) to replace the dressing layer (6).

2. The dressing device for assisting skin repair according to claim 1, characterized in that, The protective cover (4) has a spherical crown structure.

3. The dressing device for assisting skin repair according to claim 2, characterized in that, The coverage area of ​​the protective cover (4) is greater than the coverage area of ​​the adhesive layer (1).

4. The dressing device for assisting skin repair according to claim 3, characterized in that, The protective cover (4) is made of elastic material and is initially subjected to a pre-tightening stress pointing radially inward.

5. The dressing device for assisting skin repair according to claim 4, characterized in that, The inflatable connecting airbag (502) has a ring-shaped structure.

6. The dressing device for assisting skin repair according to claim 5, characterized in that, The pressure fixing component includes a button (8) corresponding to the shape of the dressing window (2), and the bottom of the button (8) can fit against the top surface of the pressure airbag (501).

7. The dressing device for assisting skin repair according to claim 6, characterized in that, The adhesive layer (1) is a gradually thickened curved surface structure with a center thickness greater than the edge thickness.

8. The dressing device for assisting skin repair according to claim 7, characterized in that, The button (8) has a ventilation window (9) and a plug is detachably attached to the ventilation window (9).

9. The dressing device for assisting skin repair according to claim 8, characterized in that, The plug includes a vent plug (10) with several vent holes (11) on it.

10. The dressing device for assisting skin repair according to claim 8, characterized in that, The plug includes a sealing plug (12), and a symmetrical negative pressure window (13) is provided on the button (8). A one-way valve (14) is fixedly connected to the button (8) at the corresponding negative pressure window (13). The one-way valve (14) only allows the gas in the negative pressure window (13) to flow outward. There is a negative pressure chamber (15) between the protective cover (4) and the adhesive layer (1), and the space at the bottom of the button (8) is connected to the negative pressure chamber (15).

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