Negative pressure coupled electric field wound dressing and use method thereof

Abstract

The invention discloses a negative pressure coupled electric field wound dressing, comprising a dressing body, the top of which is covered with a flexible sealing film for sealing and fixing the dressing body on the wound surface, a negative pressure component connected with the dressing body and generating negative pressure is arranged on the flexible sealing film, an electrode ring for applying to the wound surface to generate an electric field is arranged on the dressing body, a pyroelectric element for sensing the temperature change of the wound surface to release the charge is embedded in the dressing body, and the pyroelectric element is connected to the electrode ring. It has the advantages of simple structure and avoiding electric field failure caused by twisting and breaking of the wire.

Description

Technical Field

[0001] The present invention relates to the technical field of wound dressings, and in particular to a negative pressure coupled electric field wound dressing and a use method thereof. Background Art

[0002] At present, closed negative pressure drainage dressings are widely used in the field of wound healing. Studies have shown that the combination of specific negative pressure and specified electric field can greatly accelerate the healing speed of wounds, and the combined treatment of the two can achieve a faster healing speed. The existing negative pressure coupled electric field dressings are wire-threaded, which is relatively complicated in process and easy to fall off, resulting in electric field failure. Due to the existence of negative pressure, if the wire is too hard, pressure sores are prone to occur, so soft wires are used. Soft wires are prone to twisting and breaking when connected to an external power source. When connected to an external power source, they need to be passed through the dressing body, and their sealing cannot be guaranteed. Therefore, most of the current treatments on the market are separate negative pressure drainage treatments and separate electric field treatments. This not only fails to achieve the effect of the combined use of negative pressure and electric field, but also increases the difficulty of operation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a negative pressure coupled electric field wound dressing having a simple structure, avoiding electric field failure caused by wire twisting and breakage, and preventing the occurrence of pressure sores, and a method of using the same.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A negative pressure coupled electric field wound dressing comprises a dressing body, the top of the dressing body is covered with a flexible sealing film for sealing and fixing the dressing body on the wound surface, the flexible sealing film is provided with a negative pressure component which is connected with the dressing body and generates negative pressure, the dressing body is provided with an electrode ring for being applied to the wound surface to generate an electric field, the dressing body is embedded with a pyroelectric element for sensing the temperature change of the wound surface to release electric charge, and the pyroelectric element is connected to the electrode ring.

[0005] As a further improvement of the above technical solution: The negative pressure assembly comprises a negative pressure cover and a negative pressure tube. The negative pressure cover is arranged on the flexible sealing film and communicated with the dressing body. The negative pressure tube is fixed on the negative pressure cover and communicated with an external negative pressure device.

[0006] The flexible sealing film is provided with a negative pressure hole connecting the dressing body and the negative pressure cover.

[0007] The dressing body comprises foam cotton, water-absorbent cotton and a silicone gel layer, the flexible sealing film is coated on the foam cotton, and the electrode ring is arranged below the silicone gel layer.

[0008] A plurality of seepage holes are distributed on the silicone gel layer.

[0009] A protective film is coated under the silicone gel layer.

[0010] A feedback module for sensing the charge value released by the pyroelectric element is hidden in the negative pressure cover. The feedback module is electrically connected to a controller, and the controller is electrically connected to the pyroelectric element and the negative pressure device.

[0011] A method for using a negative pressure coupled electric field wound dressing comprises the following steps: S1: Tear off the protective film, apply the dressing body to the patient's wound surface, and seal and fix it with a flexible sealing film; S2: Turn on the negative pressure device. The negative pressure component generates negative pressure to absorb the exudate from the wound surface. At the same time, the pyroelectric element senses the temperature change of the wound surface, releases the charge and forms an electric field at the wound surface through the electrode ring; S3: The feedback module obtains the charge release value of the pyroelectric element and transmits it to the controller, and the controller adjusts the negative pressure according to the charge release value.

[0012] As a further improvement of the above technical solution: In step S3, the charge values ​​K1, K2 and K3 are set in sequence from large to small according to the size of the wound and the healing condition. When the charge value received by the controller is greater than K1, the controller interrupts the connection between the pyroelectric element and the electrode coil and turns off the electric field; when the charge value received by the controller is between K2 and K1, the controller controls the negative pressure device to increase the negative pressure, and restores the connection between the pyroelectric element and the electrode coil to turn on the electric field; when the charge value received by the controller is between K3 and K2, the controller controls the negative pressure device to restore the normal negative pressure; when the charge value received by the controller is less than K3, the controller controls the negative pressure device to reduce the negative pressure.

[0013] Compared with the prior art, the advantages of the present invention are: The present invention releases electric charges spontaneously through the pyroelectric element embedded in the dressing body, and generates an electric field at the wound surface through the electrode ring. There is no need to use an external power supply in the form of wires, which avoids the situation where the wires are twisted and broken, resulting in failure of the electric field. It also prevents the wires from being too hard when negative pressure is applied, thereby preventing pressure sores from occurring. Negative pressure and electric field can be applied simultaneously at the wound surface. The present invention has a simple structure and is easy to operate, which greatly improves the wound healing speed.

[0014] The method obtains the charge value released by the pyroelectric element through a feedback module to determine the amount of exudate at the wound surface. The controller timely adjusts the negative pressure generated by the negative pressure device based on the charge value, thereby avoiding secondary infection caused by excessive exudate at the wound surface and promoting wound healing. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a partial structural schematic diagram of the present invention.

[0017] The symbols in the figure represent: 1. Dressing body; 11. Foam cotton; 12. Absorbent cotton; 13. Silicone gel layer; 131. Seepage hole; 2. Flexible sealing film; 21. Negative pressure hole; 3. Negative pressure component; 31. Negative pressure cover; 32. Negative pressure tube; 4. Electrode coil; 5. Pyroelectric element; 6. Protective film; 7. Controller. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 and Figure 2 As shown, the negative pressure coupled electric field wound dressing of this embodiment includes a dressing body 1, the top of the dressing body 1 is covered with a flexible sealing film 2 for sealing and fixing the dressing body 1 on the wound, the flexible sealing film 2 is provided with a negative pressure component 3 which is connected with the dressing body 1 and generates negative pressure, the dressing body 1 is provided with an electrode ring 4 for being applied to the wound to generate an electric field, the dressing body 1 is embedded with a pyroelectric element 5 for sensing the temperature change of the wound to release electric charge, and the pyroelectric element 5 is connected to the electrode ring 4. The present invention uses the pyroelectric element 5 embedded in the dressing body 1 to spontaneously release charges (due to the accelerated blood flow rate in the injured area, the temperature next to the wound will be high. When the wound is in the healing period, granulation tissue is formed and the surrounding blood vessels are relatively abundant, which can easily lead to a relatively high temperature next to the wound. The working principle of the pyroelectric element 5 is based on the pyroelectric effect, which is a phenomenon that the polarization intensity of a material changes with temperature after absorbing radiation energy. When a temperature difference occurs on the human body wound surface and infrared radiation irradiates the surface of the pyroelectric material, the temperature of the material will rise due to the absorption of radiation, resulting in a change in polarization intensity. Due to the high resistivity of the material, the charge change cannot be neutralized in time, so a transient voltage is generated between the two surfaces of the material. Through the external circuit, these charges can be released to form a current), and an electric field is generated at the wound surface through the electrode ring 4. There is no need to use a wire to connect an external power supply, so as to avoid the situation where the wire is twisted and broken to cause the electric field to fail, and to prevent the wire from being too hard to cause pressure sores when negative pressure is applied, so that negative pressure and electric field can be carried out simultaneously at the wound surface. The present invention has a simple structure and is easy to operate, which greatly improves the healing speed of the wound surface.

[0020] In this embodiment, the negative pressure assembly 3 includes a negative pressure cover 31 and a negative pressure tube 32. The negative pressure cover 31 is arranged on the flexible sealing film 2 and communicated with the dressing body 1. The negative pressure tube 32 is fixed to the negative pressure cover 31 and communicated with an external negative pressure device. The structure is simple. The dressing body 1 is applied on the wound surface, the negative pressure cover 31 is communicated with the dressing body 1, and the negative pressure cover 31 is connected to the negative pressure device through the negative pressure tube 32. The negative pressure device generates negative pressure to extract the exudate from the wound surface by negative pressure.

[0021] In this embodiment, the flexible sealing film 2 is provided with a negative pressure hole 21 connecting the dressing body 1 and the negative pressure cover 31. The structure is simple.

[0022] In this embodiment, the dressing body 1 includes foam cotton 11, absorbent cotton 12 and silicone gel layer 13, the flexible sealing film 2 is coated on the foam cotton 11, and the electrode ring 4 is arranged below the silicone gel layer 13. Such arrangement facilitates the embedding of the pyroelectric element 5 to form a soft buffer layer to avoid the occurrence of pressure sores, and at the same time, the absorbent cotton 12 has a good adsorption effect on exudate, which is conducive to negative pressure extraction.

[0023] In this embodiment, a plurality of seepage holes 131 are distributed on the silicone gel layer 13. In this structure, when negative pressure therapy is performed, the exudate can be sucked out by the negative pressure component 3 through the seepage holes 131.

[0024] In this embodiment, a protective film 6 is coated below the silicone gel layer 13. The protective film 6 is provided to coat and protect the silicone gel layer 13 to avoid contamination.

[0025] In this embodiment, a feedback module for sensing the charge value released by the pyroelectric element 5 is hidden in the negative pressure cover 31, and the feedback module is electrically connected to the controller 7, and the controller 7 is electrically connected to the pyroelectric element 5 and the negative pressure device. In this structure, by setting the feedback module and the controller 7, the feedback module feeds back the charge value released by the pyroelectric element 5 to the controller 7, and judges the amount of wound exudate according to the charge value (after the wound appears, the patient does not do a good job of hygiene, resulting in the wound being infected by pathogenic microorganisms and inflammation. When the wound is inflamed, a large amount of inflammatory factors / exudate will be secreted, which will also cause the temperature around it to be relatively high), so as to control the size of the negative pressure and avoid excessive wound exudate causing secondary infection of the wound.

[0026] The method for using the negative pressure coupled electric field wound dressing of this embodiment comprises the following steps: S1: tear off the protective film 6, apply the dressing body 1 to the patient's wound surface, and seal and fix it with the flexible sealing film 2; S2: Turn on the negative pressure device, the negative pressure component 3 generates negative pressure to absorb the exudate from the wound surface, and at the same time, the pyroelectric element 5 senses the temperature change of the wound surface, releases the charge and forms an electric field at the wound surface through the electrode coil 4; S3: The feedback module obtains the charge release value of the pyroelectric element 5 and transmits it to the controller 7. The controller 7 adjusts the negative pressure according to the charge release value.

[0027] This method obtains the charge value released by the pyroelectric element 5 through the feedback module to determine the amount of exudate at the wound surface. The controller timely adjusts the negative pressure generated by the negative pressure device accordingly, thereby avoiding secondary infection caused by excessive exudate at the wound surface and promoting wound healing.

[0028] In this embodiment, in step S3, the charge values ​​K1, K2 and K3 are set in sequence from large to small according to the size of the wound and the healing condition. When the charge value received by the controller 7 is greater than K1, the controller 7 interrupts the connection between the pyroelectric element 5 and the electrode coil 4 and turns off the electric field; when the charge value received by the controller 7 is between K2 and K1, the controller 7 controls the negative pressure device to increase the negative pressure, and restores the connection between the pyroelectric element 5 and the electrode coil 4 to turn on the electric field; when the charge value received by the controller 7 is between K3 and K2, the controller 7 controls the negative pressure device to restore the normal negative pressure; when the charge value received by the controller 7 is less than K3, the controller 7 controls the negative pressure device to reduce the negative pressure. Since the pyroelectric element 5 is used for spontaneous discharge, in order to ensure safety, the maximum charge value K1 is set. When the charge value released by the pyroelectric element 5 is greater than K1, the electric field is disconnected in time, and then the charge values ​​K2 and K3 are set step by step according to the size of the wound. The negative pressure generated by the negative pressure component 3 is controlled by the controller 7 to adapt to the amount of exudate at the wound in real time, avoid accumulation of exudate, and prevent excessive negative pressure from affecting wound healing.

[0029] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A negative pressure coupled electric field wound dressing, characterized in that: The dressing body (1) comprises a dressing body (1), the top of which is covered with a flexible sealing film (2) for sealing and fixing the dressing body (1) on a wound surface, the flexible sealing film (2) being provided with a negative pressure component (3) which is in communication with the dressing body (1) and generates negative pressure, the dressing body (1) being provided with an electrode ring (4) for being applied to a wound surface to generate an electric field, the dressing body (1) being embedded with a pyroelectric element (5) for sensing temperature changes on the wound surface to release electric charge, the pyroelectric element (5) being connected to the electrode ring (4).

2. The negative pressure coupled electric field wound dressing according to claim 1, characterized in that: The negative pressure assembly (3) comprises a negative pressure cover (31) and a negative pressure tube (32); the negative pressure cover (31) is arranged on the flexible sealing film (2) and is connected to the dressing body (1); the negative pressure tube (32) is fixedly connected to the negative pressure cover (31) and is connected to an external negative pressure device.

3. The negative pressure coupled electric field wound dressing according to claim 2, characterized in that: The flexible sealing film (2) is provided with a negative pressure hole (21) which connects the dressing body (1) and the negative pressure cover (31).

4. The negative pressure coupled electric field wound dressing according to claim 3, characterized in that: The dressing body (1) comprises foam cotton (11), water-absorbent cotton (12) and a silicone gel layer (13); the flexible sealing film (2) is coated on the foam cotton (11); and the electrode ring (4) is arranged below the silicone gel layer (13).

5. The negative pressure coupled electric field wound dressing according to claim 4, characterized in that: A plurality of seepage holes (131) are distributed on the silicone gel layer (13).

6. The negative pressure coupled electric field wound dressing according to claim 5, characterized in that: A protective film (6) is coated underneath the silicone gel layer (13).

7. The negative pressure coupled electric field wound dressing according to any one of claims 2 to 6, characterized in that: A feedback module for sensing the charge value released by the pyroelectric element (5) is concealed in the negative pressure cover (31); the feedback module is electrically connected to a controller (7); and the controller (7) is electrically connected to the pyroelectric element (5) and the negative pressure device.

8. A method for using the negative pressure coupled electric field wound dressing according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: tear off the protective film (6), apply the dressing body (1) to the patient's wound surface, and seal and fix it with the flexible sealing film (2); S2: Turn on the negative pressure device, the negative pressure component (3) generates negative pressure to absorb the exudate from the wound surface, and at the same time the pyroelectric element (5) senses the temperature change of the wound surface, releases the charge and forms an electric field at the wound surface through the electrode coil (4); S3: The feedback module obtains the charge release value of the pyroelectric element (5) and transmits it to the controller (7), and the controller (7) adjusts the negative pressure according to the charge release value.

9. The method for using the negative pressure coupled electric field wound dressing according to claim 8, characterized in that: In step S3, the charge values ​​K1, K2 and K3 are set in order from large to small according to the size of the wound surface and the healing condition. When the charge value received by the controller (7) is greater than K1, the controller (7) interrupts the connection between the pyroelectric element (5) and the electrode ring (4) and turns off the electric field. When the charge value received by the controller (7) is between K2 and K1, the controller (7) controls the negative pressure device to increase the negative pressure and restores the connection between the pyroelectric element (5) and the electrode ring (4) to turn on the electric field. When the charge value received by the controller (7) is between K3 and K2, the controller (7) controls the negative pressure device to restore the normal negative pressure. When the charge value received by the controller (7) is less than K3, the controller (7) controls the negative pressure device to reduce the negative pressure.

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