Wound dressing

Abstract

The utility model provides a wound dressing, and relates to the technical field of wound repair. The wound dressing comprises a breathable supporting layer, a collagen layer, a protective layer and a negative pressure generating structure, the breathable supporting layer is provided with a first face and a second face which are arranged oppositely, and at least one first seepage hole penetrating through the first face and the second face is formed in the breathable supporting layer; the collagen layer is arranged on the first surface of the breathable supporting layer, and second seepage holes communicated with the first seepage holes are formed in the collagen layer; the protective layer is arranged on the second surface of the breathable supporting layer, and the protective layer is provided with a communication channel communicated with the second seepage hole; the negative pressure generating structure is installed on the protective layer, a port of the negative pressure generating structure communicates with the communicating channel, and the negative pressure generating structure can generate negative pressure and suck liquid through the communicating channel. The wound dressing has good air permeability, and can absorb exudate through negative pressure so as to promote wound repair.

Description

Technical Field

[0001] The present application relates to the technical field of wound repair, and in particular to a wound dressing. Background Art

[0002] Wounds such as burns, knife wounds, sports injuries, and pressure sores typically take a long time to heal and are prone to infection and complications. Collagen is widely used in wound dressings due to its excellent biocompatibility and ability to promote platelet activation. It can quickly form a protective matrix at the wound site, promoting coagulation and thus promoting wound healing.

[0003] However, existing adhesive dressings generally have poor air permeability. Moreover, for some wounds, a large amount of fluid accumulates around the wound and the wound continues to exude fluid, resulting in a long healing time and difficulty in healing.

[0004] Based on this, the present application provides a wound dressing. Utility Model Content

[0005] The present application provides a wound dressing, which has good air permeability and can absorb exudate through negative pressure to promote wound repair.

[0006] This application is implemented as follows:

[0007] The present application provides a wound dressing, comprising:

[0008] a breathable support layer, the breathable support layer having a first surface and a second surface disposed opposite to each other and having at least one first liquid permeation hole penetrating the first surface and the second surface;

[0009] a collagen layer, the collagen layer being disposed on the first surface of the breathable support layer; the collagen layer being provided with a second liquid permeation hole communicating with the first liquid permeation hole;

[0010] a protective layer, the protective layer being disposed on the second surface of the breathable support layer, the protective layer having a communication channel communicating with the first liquid permeation hole; and

[0011] A negative pressure generating structure is installed on the protective layer, and a port of the negative pressure generating structure is connected to the connecting channel. The negative pressure generating structure can generate negative pressure and absorb liquid through the connecting channel.

[0012] In one possible embodiment, the breathable support layer is a polytetrafluoroethylene microporous membrane.

[0013] In one possible embodiment, the breathable support layer is an expanded polytetrafluoroethylene microporous membrane.

[0014] In a possible embodiment, the first surface of the breathable support layer is a rough surface, and the second surface of the breathable support layer is a smooth surface.

[0015] In one possible embodiment, the collagen layer contains chondroitin sulfate.

[0016] In a possible implementation manner, the protective layer is a silicone membrane.

[0017] In a possible embodiment, the negative pressure generating structure includes a negative pressure generating part and a first one-way valve, the two ends of the first one-way valve are respectively connected to the protective layer and the negative pressure generating part, and the first one-way valve is configured so that gas and / or liquid can enter the negative pressure generating part from the connecting channel, and can prevent gas and / or liquid from entering the connecting channel from the negative pressure generating part.

[0018] In a possible embodiment, the negative pressure generating member is a squeezable bag, and the bag has an exhaust hole at one end away from the first one-way valve. The exhaust hole is installed with a second one-way valve, and the gas in the bag can be discharged from the second one-way valve by squeezing the bag.

[0019] In one possible embodiment, the protective layer has a first region covering the breathable support layer and a second region extending out of the breathable support layer.

[0020] In a possible embodiment, a surface of the protective layer close to the breathable support layer has a groove, the groove is connected to the plurality of first liquid permeation holes, and the groove connects the first liquid permeation holes and the connecting channel.

[0021] This application has at least the following beneficial effects:

[0022] In the wound dressing of the present application, the breathable support layer plays the role of supporting the collagen layer and has good breathability. The protective layer is arranged on the second surface of the breathable support layer and has a connecting channel. The negative pressure generating structure generates negative pressure to draw the exudate from the wound from the second exudate hole of the collagen layer and the first exudate hole of the breathable support layer through the connecting channel into the negative pressure generating structure to absorb the exudate, thereby promoting wound repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1This is a schematic diagram of a wound dressing according to an embodiment of the present application;

[0025] Figure 2 Schematic diagram of the breathable support layer and the protective layer according to an embodiment of the present application.

[0026] Icon: 10-wound dressing; 11-breathable support layer; 111-first side; 112-second side; 113-first seepage hole; 12-collagen layer; 121-second seepage hole; 13-protective layer; 131-first area; 132-second area; 133-connecting channel; 134-groove; 14-negative pressure generating structure; 141-negative pressure generating part; 1411-bladder; 1412-exhaust hole; 1413-second one-way valve; 142-first one-way valve. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0029] In the description of this application, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Example

[0031] The present application embodiment provides a wound dressing 10, please refer to Figure 1 , which includes a breathable support layer 11, a collagen layer 12, a protective layer 13 and a negative pressure generating structure 14.

[0032] The breathable support layer 11 has a first surface 111 and a second surface 112 disposed opposite to each other, and has at least one first liquid permeation hole 113 extending through the first surface 111 and the second surface 112. The collagen layer 12 is disposed on the first surface 111 of the breathable support layer 11, and the collagen layer 12 is provided with a second liquid permeation hole 121 communicating with the first liquid permeation hole 113. The breathable support layer 11 not only supports the collagen layer 12 but also has good air permeability. Optionally, the breathable support layer 11 is a polytetrafluoroethylene microporous membrane, which is obtained by extruding a rod or strip of polytetrafluoroethylene, calendering it into a film, and then stretching and heat-setting it at a temperature below its melting point. The surface morphology of the polytetrafluoroethylene microporous membrane is a spiderweb-like microporous structure with pores formed between the microfibers, thereby having good air permeability. Exemplarily, the breathable support layer 11 is an expanded polytetrafluoroethylene microporous membrane.

[0033] For example, the first surface 111 of the breathable support layer 11 is rough, making it easier for the collagen layer 12 to be tightly connected to the breathable support layer 11. The collagen layer 12 contains chondroitin sulfate, which enhances tissue adhesion and promotes wound healing, helping the wound dressing 10 to adhere tightly to the tissue surrounding the wound and reduce the risk of bleeding. It should be noted that the ratio of collagen to chondroitin sulfate in the collagen layer 12 can be any ratio and is not limited in this application.

[0034] The protective layer 13 is disposed on the second surface 112 of the breathable support layer 11. The protective layer 13 has a communication channel 133 that communicates with the first liquid permeation hole 113. A negative pressure generating structure 14 is mounted on the protective layer 13, and a port of the negative pressure generating structure 14 communicates with the communication channel 133. The negative pressure generating structure 14 is capable of generating negative pressure and absorbing liquid through the communication channel 133.

[0035] Illustratively, a surface of the protective layer 13 adjacent to the breathable support layer 11 includes a groove 134. The groove 134 communicates with the plurality of first liquid seepage holes 113, and the groove 134 connects the first liquid seepage holes 113 and the communication channel 133. By providing the groove 134 in communication with the plurality of first liquid seepage holes 113, and then with the communication channel 133 via the groove 134, the groove 134 provides a larger space, allowing for easier suction of liquid exudate and facilitating installation of the negative pressure generating structure 14 on the protective layer 13.

[0036] In the wound dressing 10 of the present application, the breathable support layer 11 supports the collagen layer 12 and has good ventilation. The protective layer 13 is provided on the second surface 112 of the breathable support layer 11 and has a connecting channel 133. The negative pressure generating structure 14 generates negative pressure to draw exudate from the wound through the second exudate holes 121 of the collagen layer 12 and the first exudate holes 113 of the breathable support layer 11, through the connecting channel 133, into the negative pressure generating structure 14, where the exudate is absorbed, thereby promoting wound repair. When using the wound dressing 10 of the present application, one side of the collagen layer 12 is attached to the wound. A few days before attachment, the exudate is first absorbed using the negative pressure generating structure 14. Then, the protective layer 13 and the negative pressure generating structure 14 are peeled off from the second surface 112 of the breathable support layer 11, exposing the second surface 112 of the breathable support layer 11. The breathable support layer 11 has good air permeability, thereby facilitating wound healing. In order to make it easier to peel the protective layer 13 from the second surface 112 of the breathable support layer 11, the second surface 112 of the second support layer is illustratively a smooth surface. In addition, optionally, the protective layer 13 is a silicone film.

[0037] Optionally, the diameters of the first and second seepage holes 113, 121 are 0.2-1 mm. If the diameter of the second seepage hole 121 is too large, a large area of ​​the wound surface will not be covered by the collagen layer 12. If the diameter of the second seepage hole 121 is too small, the exudate will not be easily discharged from the second seepage hole 121 when negative pressure is generated to absorb the exudate. In this embodiment, the diameters of the first and second seepage holes 113, 121 are 0.2-1 mm. This ensures that the wound surface is covered by the collagen layer 12 without significantly affecting the treatment effect, while also ensuring that the exudate can be absorbed through the second seepage hole 121. Optionally, the aperture of the first seepage hole 113 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm; the aperture of the second seepage hole 121 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0038] For example, the aperture of the first liquid seepage hole 113 is larger than the aperture of the second liquid seepage hole 121. When the negative pressure generating structure 14 generates negative pressure to absorb liquid, the seepage liquid is more likely to enter the first liquid seepage hole 113 through the second liquid seepage hole 121, and then enter the negative pressure generating structure 14 through the connecting channel 133.

[0039] Please refer to Figure 1 and Figure 2In one embodiment, the protective layer 13 has a first region 131 that covers the breathable support layer 11 and a second region 132 that extends beyond the breathable support layer 11. Because the second region 132 of the protective layer 13 extends beyond the breathable support layer 11, when the wound dressing 10 is applied to a wound, the protective layer 13 covers the breathable support layer 11 and contacts the skin, allowing the wound dressing 10 to adhere better to the wound. Furthermore, when peeling off the protective layer 13, peeling it off starting from the second region 132 makes it easier to do so.

[0040] Furthermore, in one embodiment, the negative pressure generating structure 14 includes a negative pressure generating part 141 and a first one-way valve 142. The two ends of the first one-way valve 142 are respectively connected to the protective layer 13 and the negative pressure generating part 141. The first one-way valve 142 is configured to allow gas and / or liquid to enter the negative pressure generating part 141 from the connecting channel 133, and to prevent gas and / or liquid from entering the connecting channel 133 from the negative pressure generating part 141.

[0041] Negative pressure is generated by the negative pressure generating element 141, so that the exudate from the wound surface enters the first one-way valve 142 through the second seepage hole 121, the first seepage hole 113 and the connecting channel 133, and then enters the negative pressure generating element 141. After entering the negative pressure generating element 141, the first one-way valve 142 prevents the exudate in the negative pressure generating element 141 from entering the wound dressing 10 again.

[0042] Exemplarily, the negative pressure generating member 141 is a squeezable capsule 1411 having an exhaust hole 1412 at one end of the capsule 1411 away from the first one-way valve 142 , and a second one-way valve 1413 is installed in the exhaust hole 1412 . By squeezing the capsule 1411 , the gas in the capsule 1411 can be discharged from the second one-way valve 1413 .

[0043] By squeezing the bag 1411, the gas in the bag 1411 is discharged from the second one-way valve 1413 to form negative pressure, so that the exudate from the wound surface enters the first one-way valve 142 through the second seepage hole 121, the first seepage hole 113 and the connecting channel 133 and enters the negative pressure generating part 141.

[0044] In summary, in the wound dressing 10 of the embodiment of the present application, the breathable support layer 11 plays the role of supporting the collagen layer 12 and has good breathability. The protective layer 13 is arranged on the second surface 112 of the breathable support layer 11 and has a connecting channel 133. The negative pressure generating structure 14 generates negative pressure to draw the exudate from the wound from the second exudate hole 121 of the collagen layer 12 and the first exudate hole 113 of the breathable support layer 11 through the connecting channel 133 into the negative pressure generating structure 14 to absorb the exudate, thereby promoting wound repair.

[0045] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A wound dressing, characterized in that: include: a breathable support layer, the breathable support layer having a first surface and a second surface disposed opposite to each other, and having at least one first liquid permeation hole penetrating the first surface and the second surface; a collagen layer, the collagen layer being disposed on the first surface of the breathable support layer, the collagen layer being provided with a second liquid seepage hole communicating with the first liquid seepage hole; a protective layer, the protective layer being disposed on the second surface of the breathable support layer, the protective layer having a communication channel communicating with the first liquid permeation hole; as well as A negative pressure generating structure is installed on the protective layer, and a port of the negative pressure generating structure is connected to the connecting channel. The negative pressure generating structure can generate negative pressure and absorb liquid through the connecting channel.

2. The wound dressing according to claim 1, characterized in that The breathable support layer is a polytetrafluoroethylene microporous membrane.

3. The wound dressing according to claim 1, characterized in that The breathable support layer is an expanded polytetrafluoroethylene microporous membrane.

4. The wound dressing according to any one of claims 1 to 3, characterized in that The first surface of the breathable support layer is a rough surface, and the second surface of the breathable support layer is a smooth surface.

5. The wound dressing according to any one of claims 1 to 3, characterized in that The collagen layer contains chondroitin sulfate.

6. The wound dressing according to any one of claims 1 to 3, characterized in that The protective layer is a silicone film.

7. The wound dressing according to any one of claims 1 to 3, characterized in that The negative pressure generating structure includes a negative pressure generating part and a first one-way valve, the two ends of the first one-way valve are respectively connected to the protective layer and the negative pressure generating part, and the first one-way valve is configured so that gas and / or liquid can enter the negative pressure generating part from the connecting channel, and can prevent gas and / or liquid from entering the connecting channel from the negative pressure generating part.

8. The wound dressing according to claim 7, characterized in that The negative pressure generating member is a squeezable bag, and the bag has an exhaust hole at one end away from the first one-way valve. The exhaust hole is installed with a second one-way valve. By squeezing the bag, the gas in the bag can be discharged from the second one-way valve.

9. The wound dressing according to any one of claims 1 to 3, characterized in that The protective layer has a first region covering the breathable support layer and a second region extending out of the breathable support layer.

10. The wound dressing according to any one of claims 1 to 3, characterized in that: A surface of the protective layer close to the breathable support layer has a groove, the groove is connected to the plurality of first liquid permeation holes, and the groove connects the first liquid permeation holes and the communication channel.

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