Self-generating negative pressure drainage dressing

Abstract

The invention discloses a self-generating negative pressure drainage dressing which comprises a dressing body, a negative pressure assembly is arranged on the dressing body, a gel layer used for covering a wound surface is arranged at the bottom of the dressing body, a negative ion electrode is arranged in the middle of the gel layer, and a positive ion electrode is arranged on the edge of the gel layer. A plurality of ion channels are arranged between the negative ion electrode and the positive ion electrode, and by selectively adding deionized liquid into the ion channels, positive ions in the positive ion electrode move towards the negative ion electrode along a preset path, so that a regional electric field is formed on the gel layer between the ion channels added with the deionized liquid. The patch has the advantages of convenience in application, good comfort and selective treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a self-power negative pressure drainage dressing. BACKGROUND

[0002] The current closed negative pressure drainage dressing is widely used in the field of wound healing. The treatment of adding an electric field while negative pressure helps the healing of the epidermal tissue of the wound. The addition of a directional electric field greatly accelerates the healing speed of the wound. The existing negative pressure coupled electric field dressing is connected by a wire, which is relatively complex in process and is easy to fall off, resulting in electric field failure. Since there is negative pressure, if the hardness of the wire is too hard, pressure sores may occur. Therefore, a soft wire is used. The soft wire is easy to twist and break when an external power source is connected. When the external power source is connected, it needs to be connected from the main body of the dressing, which cannot guarantee its sealing performance. In addition, the wound healing of the negative pressure drainage dressing is easy to adhere to the dressing and cause secondary damage under long-term negative pressure treatment. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a self-power negative pressure drainage dressing which is convenient to apply, comfortable and selectively treatable.

[0004] To solve the above technical problems, the following technical solutions are adopted: A self-power negative pressure drainage dressing, comprising a dressing body, a negative pressure assembly is arranged on the dressing body, a gel layer for covering a wound is arranged at the bottom of the dressing body, a negative ion electrode is arranged in the middle of the gel layer, a positive ion electrode is arranged at the edge of the gel layer, a plurality of ion channels are arranged between the negative ion electrode and the positive ion electrode, deionized liquid is selectively added to the ion channels, so that the positive ions in the positive ion electrode move along a preset path to the negative ion electrode, thereby forming a regional electric field on the gel layer between the ion channels where the deionized liquid is added.

[0005] As a further improvement of the above technical solution: The negative ion electrode is arranged as a point-shaped gel electrode with negative ions, and the positive ion electrode is arranged as a ring-shaped electrode with positive ions and taking the negative ion electrode as a center.

[0006] A first adding hole for adding deionized liquid and extending to the outer surface of the dressing body is arranged on each ion channel.

[0007] A second adding hole for adding positive ion gel to enhance the electric field strength is arranged on the positive ion electrode, and the second adding hole extends to the outer surface of the dressing body.

[0008] The negative pressure assembly comprises a suction disc, a negative pressure cover and a negative pressure tube, the suction disc is arranged on the dressing body and communicates with the dressing body, the negative pressure cover is arranged on the suction disc to form a sealed negative pressure cavity, and the negative pressure tube is connected to the negative pressure cover and communicates with an external negative pressure source.

[0009] The dressing body comprises foam cotton for absorbing tissue and water-absorbing cotton for collecting exudate, and the foam cotton is arranged below the water-absorbing cotton.

[0010] A plurality of permeation holes are arranged on the gel layer.

[0011] A release film is arranged at the bottom of the gel layer.

[0012] The top of the dressing body is covered with a flexible sealing film for sealing and fixing the dressing body at the wound surface.

[0013] Compared with the prior art, the present application has the following advantages: The present application selectively adds deionized liquid in the ion channel according to the shape of the wound surface and the healing requirement, forms a regional electric field on the gel layer between the ion channels where the deionized liquid is added, and carries out local electric stimulation treatment on the wound surface in a targeted manner, without the need of external power supply. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a schematic diagram of the overall structure of the present application.

[0015] Fig. 2 is a schematic diagram of the layout of the positive ion electrode and the negative ion electrode of the present application (top view).

[0016] Fig. 3 is a schematic diagram of the layout of the positive ion electrode and the negative ion electrode of the present application (perspective view).

[0017] In the drawings, various reference numerals represent: 1, dressing body; 11, foam cotton; 12, water-absorbing cotton; 2, negative pressure assembly; 21, suction disc; 22, negative pressure cover; 23, negative pressure tube; 3, gel layer; 31, permeation hole; 4, negative ion electrode; 5, positive ion electrode; 51, second adding hole; 6, ion channel; 61, first adding hole; 7, release film; 8, flexible sealing film. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] As Figs. 1 to 3As shown, the self-powered negative pressure drainage dressing of the embodiment comprises a dressing body 1, a negative pressure assembly 2 arranged on the dressing body 1, a gel layer 3 arranged at the bottom of the dressing body 1 for covering a wound surface, a negative ion electrode 4 arranged in the middle of the gel layer 3, a positive ion electrode 5 arranged at the edge of the gel layer 3, a plurality of ion channels 6 arranged between the negative ion electrode 4 and the positive ion electrode 5, and deionized liquid selectively added into the ion channels 6 to make positive ions in the positive ion electrode 5 move along a preset path to the negative ion electrode 4, thereby forming a regional electric field on the gel layer 3 between the ion channels 6 to which the deionized liquid is added. According to the shape of the wound surface and the healing requirement, the deionized liquid is selectively added into the ion channels 6, so that a regional electric field is formed on the gel layer 3 between the ion channels 6 to which the deionized liquid is added, thereby performing local electric stimulation treatment on the wound surface in a targeted manner, and without the need of external power supply, thereby ensuring convenient and comfortable application.

[0020] In the embodiment, the negative ion electrode 4 is arranged as a point-shaped gel electrode with negative ions, and the positive ion electrode 5 is arranged as a ring-shaped electrode with positive ions and with the negative ion electrode 4 as the center. In this structure, the radial electrode layout of the center-periphery type can generate a radial electric field from the edge to the center of the wound surface, and can more effectively guide the wound tissue healing.

[0021] In the embodiment, each ion channel 6 is provided with a first adding hole 61 for adding deionized liquid and extending to the outer surface of the dressing body 1. Through the first adding hole 61, medical staff can add deionized liquid into only the specific ion channel 6 to which an electric field needs to be applied according to the specific contour of an irregular wound surface, like "drawing a circuit", thereby "lighting up" the corresponding electric field path, and realizing precise customized electric stimulation treatment.

[0022] In the embodiment, the positive ion electrode 5 is provided with a second adding hole 51 for adding positive ion gel to enhance the electric field strength, and the second adding hole 51 extends to the outer surface of the dressing body 1. In this structure, the positive ion gel is supplemented through the second adding hole 51 to improve the positive ion concentration, the electric field strength can be enhanced according to the severity of the wound surface, and personalized treatment can be performed.

[0023] In the embodiment, the negative pressure assembly 2 comprises a suction disc 21, a negative pressure cover 22 and a negative pressure pipe 23. The suction disc 21 is arranged on the dressing body 1 and communicates with the dressing body 1. The negative pressure cover 22 is arranged on the suction disc 21 to form a sealed negative pressure cavity. The negative pressure pipe 23 is connected to the negative pressure cover 22 and communicates with an external negative pressure source. In this structure, the suction disc 21 serves as a fixed interface, and the negative pressure cover 22 forms a reliable sealed cavity. The advantage is that the sealing property and convenience of connection with the external negative pressure source are ensured, and the negative pressure can uniformly and effectively act on the entire dressing body 1, thereby realizing stable exudate drainage.

[0024] In this embodiment, the dressing body 1 includes foam cotton 11 for absorbing tissue and absorbent cotton 12 for collecting exudate, with the foam cotton 11 located below the absorbent cotton 12. This double-layer structure, with the foam cotton 11 below and the absorbent cotton 12 above, allows the lower foam cotton 11 (typically with larger pores) to directly contact the wound surface, effectively absorbing necrotic tissue and exudate and preventing blockage. The upper absorbent cotton 12 (with strong liquid storage capacity) can absorb and temporarily store large amounts of drainage fluid. The combination of these two elements optimizes fluid management and wound cleaning.

[0025] In this embodiment, the gel layer 3 is provided with multiple seepage holes 31. The seepage holes 31 facilitate the passage of wound exudate.

[0026] In this embodiment, a release film 7 is disposed at the bottom of the gel layer 3. The release film 7 can protect the gel layer 3, ensuring product efficacy and sterility.

[0027] In this embodiment, the top of the dressing body 1 is covered with a flexible sealing membrane 8 for sealing and fixing the dressing body 1 to the wound. On the one hand, it provides the necessary sealed environment for negative pressure therapy, and on the other hand, it can firmly fix the dressing to prevent it from falling off and allowing bacteria to invade.

[0028] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A self-powered negative pressure wound drainage dressing, characterized by: The application relates to a negative pressure dressing, which comprises a dressing body (1) provided with a negative pressure assembly (2), a gel layer (3) for covering a wound surface arranged at the bottom of the dressing body (1), a negative ion electrode (4) arranged at the middle of the gel layer (3), a positive ion electrode (5) arranged at the edge of the gel layer (3), and a plurality of ion channels (6) arranged between the negative ion electrode (4) and the positive ion electrode (5). By selectively adding deionized liquid into the ion channels (6), the positive ions in the positive ion electrode (5) are allowed to move along a preset path to the negative ion electrode (4), so that a regional electric field is formed on the gel layer (3) between the ion channels (6) to which the deionized liquid is added.

2. The self-powered negative-pressure wound dressing of claim 1, wherein: The negative ion electrode (4) is a point-shaped gel electrode with negative ions, and the positive ion electrode (5) is a ring-shaped electrode with positive ions and taking the negative ion electrode (4) as a center.

3. The self-powered negative-pressure wound dressing of claim 2, wherein: A first adding hole (61) for adding deionized liquid and extending to the outer surface of the dressing body (1) is arranged on each ion channel (6).

4. The self-powered negative-pressure wound dressing of claim 3, wherein: A second adding hole (51) for adding positive ion gel to enhance the electric field intensity and extending to the outer surface of the dressing body (1) is arranged on the positive ion electrode (5).

5. The self-powered negative-pressure wound dressing of any one of claims 1-4, wherein: The negative pressure assembly (2) comprises a suction disc (21), a negative pressure cover (22) and a negative pressure pipe (23), the suction disc (21) is arranged on the dressing body (1) and communicates with the dressing body (1), the negative pressure cover (22) is arranged on the suction disc (21) to form a sealed negative pressure cavity, and the negative pressure pipe (23) is connected to the negative pressure cover (22) and communicates with an external negative pressure source.

6. The self-powered negative-pressure wound dressing of claim 5, wherein: The dressing body (1) comprises foam cotton (11) for adsorbing tissue matters and water-absorbing cotton (12) for collecting exudates, and the foam cotton (11) is arranged below the water-absorbing cotton (12).

7. The self-powered negative-pressure wound dressing of claim 6, wherein: A plurality of exudation holes (31) are arranged on the gel layer (3).

8. The self-powered negative-pressure wound dressing of claim 7, wherein: A release film (7) is arranged at the bottom of the gel layer (3).

9. The self-powered negative-pressure wound dressing of claim 8, wherein: A flexible sealing film (8) is arranged on the top of the dressing body (1) to seal and fix the dressing body (1) at the wound surface.

Images