Negative voltage electric field dressing

Abstract

The negative pressure electric field dressing comprises a dressing body, the top of the dressing body is covered with a flexible sealing film used for sealing the dressing body and fixing the dressing body to a wound surface, and the flexible sealing film is provided with a negative pressure assembly which is communicated with the dressing body and generates negative pressure. The flexible sealing film is further provided with an electric field assembly which can be adjusted according to the shape of a wound surface so as to apply a local directional electric field to the dressing body, and the dressing body generates local contraction under the action of the local directional electric field so as to promote uniform closing of the wound surface. The dressing has the advantages of relieving wound tension and promoting uniform healing of wounds.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a negative pressure electric field dressing. Background Technology

[0002] Current vacuum-assisted closure (VSD) is a treatment method that uses a polyethylene alcohol-hydrated alginate foam dressing to cover the wound, combined with a biological semi-permeable membrane to form a closed space, and uses controlled negative pressure to promote wound healing. However, when faced with large and irregularly shaped wounds, the wound tension slows down the healing process of the wound surface cells and results in poor closure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a negative pressure electric field dressing that relieves wound tension and promotes uniform wound healing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A negative pressure electric field dressing includes a dressing body, the top of which is covered with a flexible sealing membrane for sealing and fixing the dressing body to a wound. The flexible sealing membrane is provided with a negative pressure component that communicates with the dressing body and generates negative pressure. The flexible sealing membrane is also provided with an electric field component that can be adjusted according to the shape of the wound to apply a localized directional electric field to the dressing body. Under the action of the localized directional electric field, the dressing body undergoes local contraction to promote uniform closure of the wound.

[0005] As a further improvement to the above technical solution: The dressing body includes an absorbent sponge and an electroactive ion gel layer arranged in sequence. Ions in the electroactive ion gel layer move in a direction under the drive of a local directional electric field, thereby causing the electroactive ion gel layer to contract locally.

[0006] The electric field component includes at least one pair of positive electrode plates, a negative electrode plate, and corresponding wires. The positive electrode plates and negative electrode plates are disposed between the absorbent sponge and the electroactive ion gel layer. The wires are connected to the corresponding positive electrode plates and negative electrode plates and connected to an external power source.

[0007] The lengths of the positive and negative electrode pads are adapted to the shape of the wound. The positive electrode pad is placed on the sharp edge of the wound, and the negative electrode pad is placed on the gentle edge of the wound. The length of the positive electrode pad is shorter than that of the negative electrode pad.

[0008] The external power supply is configured such that when the wound is severe, the external power supply outputs a strong current through a wire; when the wound is minor, the external power supply outputs a weak current through a wire.

[0009] The flexible sealing membrane is provided with a conduit for placing wires.

[0010] The negative pressure assembly includes a suction cup and a negative pressure tube. The suction cup is placed on a flexible sealing membrane and communicates with an absorbent sponge. The negative pressure tube communicates with the suction cup and is connected to a negative pressure device.

[0011] The electroactive ion gel layer has multiple permeation pores distributed on it.

[0012] A peelable release film is provided at the bottom of the electroactive ionic gel layer.

[0013] Chitosan is also provided within the electroactive ion gel layer.

[0014] Compared with the prior art, the advantages of the present invention are as follows: Compared to traditional negative pressure dressings, this invention introduces an electric field component that can dynamically apply a directional electric field according to the shape of the wound, causing the dressing body to contract locally, thereby actively promoting uniform wound closure and overcoming the problems of poor central and clustered healing or irregular wound closure that may occur with traditional dressings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the arrangement of positive and negative electrode sheets in Embodiment 1 of the present invention.

[0017] Figure 3 This is a schematic diagram of the arrangement of positive and negative electrode sheets in Embodiment 2 of the present invention.

[0018] The labels in the diagram represent: 1. Dressing body; 11. Absorbent sponge; 12. Electroactive ion gel layer; 121. Pore; 2. Flexible sealing membrane; 21. Tube; 3. Negative pressure assembly; 31. Suction cup; 32. Negative pressure tube; 4. Electric field assembly; 41. Positive electrode sheet; 42. Negative electrode sheet; 43. Wire. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: like Figure 1 and Figure 2As shown, the first embodiment of the negative pressure electric field dressing of the present invention includes a dressing body 1. A flexible sealing membrane 2 is covered on top of the dressing body 1 to seal and fix it at the wound surface. A negative pressure component 3, which communicates with the dressing body 1 and generates negative pressure, is disposed on the flexible sealing membrane 2. An electric field component 4, which can be adjusted according to the wound shape to apply a localized directional electric field to the dressing body 1, is also disposed on the flexible sealing membrane 2. Under the action of the localized directional electric field, the dressing body 1 undergoes local contraction to promote uniform wound closure. Compared with traditional negative pressure dressings, the present invention introduces an electric field component 4 that can dynamically apply a directional electric field according to the wound shape, causing the dressing body 1 to undergo local contraction, thereby actively promoting uniform wound closure and overcoming the problems of poor central and clustered healing or irregular wound closure that may occur with traditional dressings.

[0021] In this embodiment, the dressing body 1 includes an absorbent sponge 11 and an electroactive ion gel layer 12 arranged sequentially. Ions in the electroactive ion gel layer 12 move directionally under the drive of a localized electric field, thereby causing the electroactive ion gel layer 12 to contract locally. In this structure, the absorbent sponge 11 has the advantages of being soft, compressible, and having good liquid absorption. It can closely adhere to irregular tissues and absorb wound exudate. The electroactive ion gel layer 12 has excellent biocompatibility, flexibility, and electric field response sensitivity. By driving the directional movement of ions through an electric field, it generates precise and controllable local mechanical contraction, directly converting electrical energy into mechanical force that promotes wound healing. Its mechanism is safer and more controllable, and the material is easy to prepare and adhere to the wound surface.

[0022] In this embodiment, the electric field component 4 includes a pair of positive electrode plates 41 and a negative electrode plate 42, and corresponding wires 43. The positive electrode plates 41 and 42 are disposed between the absorbent sponge 11 and the electroactive ion gel layer 12. The wires 43 are connected to the corresponding positive electrode plates 41 and 42 and connected to an external power source. In this structure, placing the electrode plates between the absorbent sponge 11 and the electroactive ion gel layer 12 ensures that the electric field effectively penetrates and acts on the electroactive ion gel layer 12, while avoiding direct contact between the electrodes and wound tissue, thus preventing tissue damage and infection risks that may be caused by electrical stimulation.

[0023] In this embodiment, the lengths of the positive electrode 41 and the negative electrode 42 are adapted to the shape of the wound. The positive electrode 41 is placed on the sharp edge of the wound, and the negative electrode 42 is placed on the gentle edge of the wound. The positive electrode 41 is shorter than the negative electrode 42. By arranging the positive electrode 41 and the negative electrode 42 of different lengths according to the difference between the sharp and gentle sides of the wound, an asymmetric directional electric field can be generated, which can more effectively guide the wound tissue to directional contraction and migration from the sharp, high-tension area to the gentle area.

[0024] In this embodiment, the external power supply is configured such that when the wound is severe, the external power supply outputs a strong current through wire 43; when the wound is minor, the external power supply outputs a weak current through wire 43. By controlling the output current intensity through the external power supply, differentiated contractile force can be provided according to the severity of the wound and different stages of healing, thereby achieving precise and personalized treatment.

[0025] In this embodiment, a conduit 21 for placing the wire 43 is provided on the flexible sealing membrane 2. The dedicated conduit 21 for placing the wire 43 ensures stability and reliability.

[0026] In this embodiment, the negative pressure assembly 3 includes a suction cup 31 and a negative pressure tube 32. The suction cup 31 is disposed on the flexible sealing membrane 2 and communicates with the absorbent sponge 11. The negative pressure tube 32 communicates with the suction cup 31 and is connected to the negative pressure device. In this structure, the suction cup 31 and the negative pressure tube 32 are designed to be separate, which facilitates the connection and replacement of the negative pressure source.

[0027] In this embodiment, multiple perforations 121 are distributed on the electroactive ion gel layer 12. The perforations 121 facilitate the extraction of wound exudate by the negative pressure component 3.

[0028] In this embodiment, a peelable release film is provided at the bottom of the electroactive ion gel layer 12. The release film protects the ion gel layer and prevents contamination.

[0029] In this embodiment, chitosan is also disposed within the electroactive ion gel layer 12. Chitosan has multiple biological functions such as hemostasis, antibacterial activity, wound healing, analgesia, and reduction of scar hyperplasia, which can accelerate wound healing.

[0030] Example 2: like Figure 3 As shown, the second embodiment of the negative pressure electric field dressing of the present invention is basically the same as that of embodiment 1, except that: In this embodiment, the electric field component 4 includes two pairs of positive electrode plates 41, negative electrode plates 42, and corresponding wires 43. In this embodiment, two pairs of positive electrode plates 41 and negative electrode plates 42 of different lengths are arranged to accommodate the irregular shape of the wound, generating different contraction forces at each edge of the wound, promoting uniform wound closure. Different intensities of current can also be output to the two pairs of positive electrode plates 41 and negative electrode plates 42, resulting in different contraction forces of the electroactive ion gel layer 12.

[0031] 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 negative pressure electric field dressing, characterized by: The dressing body (1) is covered with a flexible sealing film (2) at the top for sealing and fixing the dressing body (1) at the wound surface, a negative pressure assembly (3) is arranged on the flexible sealing film (2) and communicates with the dressing body (1) to generate negative pressure, an electric field assembly (4) is also arranged on the flexible sealing film (2) and can be adjusted according to the shape of the wound surface to apply a local directional electric field to the dressing body (1), and the dressing body (1) generates local contraction under the action of the local directional electric field to promote uniform closure of the wound surface.

2. The negative pressure electric field dressing of claim 1, wherein: The dressing body (1) comprises a water-absorbing sponge (11) and an electroactive ionogel layer (12) arranged in sequence, and ions in the electroactive ionogel layer (12) generate directional movement under the driving of a local directional electric field to drive the electroactive ionogel layer (12) to generate local contraction.

3. The negative pressure electric field dressing of claim 2, wherein: The electric field assembly (4) comprises at least one pair of positive electrode sheets (41), negative electrode sheets (42) and corresponding wires (43), the positive electrode sheets (41) and the negative electrode sheets (42) are arranged between the water-absorbing sponge (11) and the electroactive ionogel layer (12), and the wires (43) are connected to the corresponding positive electrode sheets (41) and negative electrode sheets (42) and connected to an external power source.

4. The negative pressure electric field dressing of claim 3, wherein: The lengths of the positive electrode sheets (41) and the negative electrode sheets (42) are adapted to the shape of the wound surface, wherein the positive electrode sheets (41) are arranged at the sharp side edge of the wound surface, the negative electrode sheets (42) are arranged at the gentle side edge of the wound surface, and the length of the positive electrode sheets (41) is shorter than that of the negative electrode sheets (42).

5. The negative pressure electric field dressing of claim 4, wherein: The external power source is configured to output a strong current through the wires (43) when the wound surface is serious, and output a weak current through the wires (43) when the wound surface is slight.

6. The negative pressure electric field dressing of claim 5, wherein: A wire tube (21) for placing the wires (43) is arranged on the flexible sealing film (2).

7. The negative pressure electric field dressing of claim 6, wherein: The negative pressure assembly (3) comprises a suction disc (31) and a negative pressure tube (32), the suction disc (31) is arranged on the flexible sealing film (2) and communicates with the water-absorbing sponge (11), and the negative pressure tube (32) communicates with the suction disc (31) and is connected to a negative pressure device.

8. The negative pressure electric field dressing of claim 7, wherein: The electroactive ionogel layer (12) is distributed with a plurality of pores (121).

9. The negative pressure electric field dressing of claim 8, wherein: The electroactive ionogel layer (12) is provided at the bottom with a peelable release film.

10. The negative pressure electric field dressing of claim 9, wherein: The electroactive ionogel layer (12) is also provided with chitosan.

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