An electrode patch

Abstract

The present invention relates to an electrode patch, which comprises a flexible substrate, a flexible circuit board, and a plurality of foam pads and electrode pieces fixedly arranged on the flexible substrate. A plurality of positioning holes are provided on the foam pads, and the electrode pieces are arranged in the positioning holes and welded to the flexible circuit board. The electrode piece comprises an insulating gasket and an insulating electrode bonded together by a sealant. The insulating gasket is fixedly arranged on the flexible substrate, and the flexible circuit board is located between the insulating gasket and the insulating electrode and welded to the insulating electrode. A through hole is formed in the middle of the insulating electrode, and a thermistor is arranged at the through hole and electrically connected to the flexible circuit board. The surfaces of the foam pads and the electrode pieces are coated with a gel.

Description

Technical Field

[0001] The present invention relates to an electrode patch, belonging to the technical field of medical devices. Background Art

[0002] Glioblastoma is a malignant tumor originating from neuroepithelial tissue, commonly known as "brain cancer". Glioblastoma is the most common primary intracranial tumor. Clinical statistics abroad show that the incidence of primary intracranial tumors is 21 per 100,000, and gliomas account for about 60%. Domestic literature reports that glioblastoma accounts for 35.26% - 60.96% of intracranial tumors. Currently, the most commonly used treatment method is surgery combined with radiotherapy and chemotherapy. Since glioblastoma grows invasively, it is often difficult to completely remove it surgically. Also, because it is a radioresistant tumor and is resistant to most chemotherapeutic drugs, the overall therapeutic effect is not good. Especially high-grade gliomas have the growth characteristics of high-grade malignancy, fast postoperative recurrence, and poor prognosis, seriously threatening human health.

[0003] Tumor treating fields have a good effect on tumor treatment by interfering with and disrupting the mitosis process of cells. Currently, only the NOVOTTF-100A intermediate-frequency alternating electric field tumor treatment device developed by Novocure Limited is used clinically globally. However, its electrode array is cumbersome to use, has a high cost, and is not firmly fixed. The present invention provides an electrode patch for the above problems, which has a simple structure, is easy to operate, is firmly fixed, saves costs, has a good treatment effect, has high structural strength, and has a long service life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electrode patch with a simple structure, easy to operate, firmly fixed, cost-saving, good treatment effect, high structural strength, and long service life.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] An electrode patch, which includes a flexible substrate, a flexible circuit board, and a plurality of foam pads and electrode sheets fixed on the flexible substrate. A plurality of positioning holes are provided on the foam pads, the electrode sheets are arranged in the positioning holes, and the electrode sheets are welded to the flexible circuit board;

[0007] The electrode sheet includes an insulating gasket and an insulating electrode bonded together by a sealant. The insulating gasket is fixed on the flexible substrate, and the flexible circuit board is located between the insulating gasket and the insulating electrode and is welded to the insulating electrode;

[0008] A through hole is provided in the middle of the insulating electrode, and a thermistor is provided at the through hole. The thermistor is electrically connected to the flexible circuit board;

[0009] The foam pad and the electrode sheet are coated with gel on their surfaces.

[0010] As a further improvement of the present invention, it further includes a transmission line. A shielding layer is provided on the transmission line. An anti-disconnection soldering point is provided at the connection end of the flexible circuit board. The anti-disconnection soldering point is connected to the shielding layer to prevent the circuit on the flexible circuit board from being pulled off, and a connection sleeve is also sleeved at the welding joint of the flexible circuit board and the transmission line.

[0011] As a further improvement of the present invention, four welding points are provided on the insulating electrode, and are welded to the flexible circuit board through the four welding points.

[0012] As a further improvement of the present invention, the insulating electrode is made of ceramic material and generates capacitance or displacement current when applying the current of the induced electric field.

[0013] As a further improvement of the present invention, a silver layer is plated on the back of the insulating electrode.

[0014] As a further improvement of the present invention, the thickness of the gel is 0.5mm - 2mm, and it has conductivity, viscosity and biocompatibility.

[0015] As a further improvement of the present invention, the flexible substrate is non-woven fabric.

[0016] As a further improvement of the present invention, nine electrode sheets are provided in a rectangular array. The thermistors are provided on nine or eight of the nine electrode sheets around the perimeter. The resistance value range of the thermistor is 5K - 20k, the B value range is 3000K - 5000K, and the preferred packaging specification is 0603 or 0402.

[0017] As a further improvement of the present invention, 10 or 11 circuits are provided on the flexible circuit board, two of which are respectively the input line and the output line of the insulating electrode, and the remaining circuits are respectively the control lines of the thermistors.

[0018] As a further improvement of the present invention, the insulating electrode is circular, with a diameter of 18 - 22mm, a thickness of 0.8 - 1.2mm, and a middle via hole diameter of 2.5 - 3.5mm.

[0019] The beneficial effects produced by adopting the above technical solutions are as follows:

[0020] The electrode patch provided by the present invention has a simple structure, is easy to operate and saves costs. By setting the gel with high conductivity, viscosity and long-term biocompatibility, the electrode sheet can fully contact with the human body, better play the treatment effect, and make the electrode sheet fit more firmly. In addition, by setting the foam pad, the contact area of the gel is further increased;

[0021] The electrode sheet bonds the insulating gasket and the insulating electrode together through a sealant. The insulating electrode is made of ceramic material. By setting the insulating gasket, the disadvantages of low stiffness and strength and easy breakage of the ceramic material are improved. The flexible circuit board is provided with anti-disconnection solder joints, which are connected to the shielding layer on the transmission line to prevent the lines on the flexible circuit board from being broken when pulled. The overall structure has high strength and greatly extended service life;

[0022] There are four solder joints between the insulating electrode and the flexible circuit board, with low contact impedance and reliable connection;

[0023] By setting the thermistor, the temperature at the insulating electrode can be monitored in real time. When the temperature is abnormal, the current can be adjusted in time to ensure the safe and efficient progress of the treatment. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the present invention.

[0026] Figure 2 is Figure 1 The cross-sectional structural diagram at A-A in

[0027] Figure 3 is Figure 2 The partial enlarged view at A in

[0028] Figure 4 It is a schematic structural diagram of the back of the insulating electrode in the present invention.

[0029] Wherein: 1 flexible substrate, 1-1 flank, 2 foam pad, 2-1 positioning hole, 3 insulating gasket, 4 insulating electrode, 4-1 via hole, 5 sealant, 6 gel, 7 flexible circuit board, 8 anti-disconnection solder joint, 9 thermistor, 10 solder joint, 11 connecting sleeve, 12 transmission line. Specific Embodiments

[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the following describes the invention clearly and completely with reference to specific embodiments. It should be understood that the orientation or positional relationships indicated by terms such as "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] As Figures 1-4 shown, an electrode patch includes a flexible substrate 1, a flexible circuit board 7, and a plurality of foam pads 2 and electrode sheets fixed on the flexible substrate 1. A plurality of positioning holes 2-1 are provided on the foam pads 2, the electrode sheets are arranged in the positioning holes 2-1, and the electrode sheets are welded to the flexible circuit board 7. The electrode patch has a simple structure, is easy to operate, and has a low production cost.

[0032] The electrode sheet includes an insulating gasket 3 and an insulating electrode 4 bonded together by a sealant 5. The insulating gasket 3 is fixed on the flexible substrate 1, and the flexible circuit board 7 is located between the insulating gasket 3 and the insulating electrode 4 and is welded to the insulating electrode 4. In this embodiment, the insulating electrode 4 is made of ceramic, is circular, has a diameter of 18-22 mm, a thickness of 0.8-1.2 mm, and a middle through-hole 4-1 with a diameter of 2.5-3.5 mm. When applying the current of the induced electric field, it generates capacitance or displacement current, rather than the traditional charge transfer current. Since the insulating electrode 4 is made of ceramic, by providing the insulating gasket 3, the disadvantages of low stiffness and strength and easy breakage of the ceramic material are improved. In addition, the insulating gasket 3 also serves as an insulating layer for the welding point 10 between the flexible circuit board 7 and the insulating electrode 4.

[0033] A via hole 4-1 is formed in the middle of the insulating electrode 4, and a thermistor 9 is provided at the via hole 4-1. The thermistor 9 is electrically connected to the flexible circuit board 7. The resistance value range of the thermistor 9 is 5K - 20k, preferably 10K, the B value range is 3000K - 5000K, preferably 3470K and 3950K, and the packaging specification is preferably 0603 or 0402. In this embodiment, the electrode plates are arranged in a rectangular array with nine pieces, and the thermistor 9 is provided on nine or eight of the electrode plates around. There are 10 or 11 lines on the flexible circuit board 7, two of which are the input line and the output line of the insulating electrode 4 respectively, and the remaining lines are the control lines of the thermistor 9. The number of the thermistors 9 provided can be reasonably designed according to actual use, and it is not necessary to design on each electrode plate. By setting the thermistor 9, the temperature at the insulating electrode 4 can be monitored in real time, and the current can be adjusted in time when the temperature is abnormal, ensuring the safe and efficient progress of the treatment.

[0034] In addition, the electrode patch further includes a transmission line 11. A shielding layer is provided on the transmission line 11. An anti-disconnection solder joint 8 is provided at the connection end of the flexible circuit board 7. The anti-disconnection solder joint 8 is connected to the shielding layer. A connection sleeve 11 is also sleeved at the welding joint of the flexible circuit board 7 and the transmission line 12, which can prevent the solder joint from scratching the human body. In this embodiment, the outer diameter of the transmission line 11 is 3mm, and there are ten connecting wires with a diameter of 0.2mm inside, which are respectively welded to the 10 lines on the flexible circuit board 7. Since the anti-disconnection solder joint 8 is connected to the shielding layer, when the flexible circuit board 7 and the transmission line 11 are pulled, the anti-disconnection solder joint 8 is stressed first, preventing the lines on the flexible circuit board 7 or the connecting wires on the transmission line 11 from being broken.

[0035] The foam pad 2 and the surface of the electrode plate are coated with a gel 6, which has high conductivity, viscosity and long-term biocompatibility, is thick enough not to dry out during treatment, and the thickness is preferably 0.5 - 2mm, enabling the electrode plate to fully contact the human body, better exerting the treatment effect, and making the electrode plate fit more firmly. In addition, by setting the foam pad, the contact area of the gel is further increased. The gel 6 can be coated during use.

[0036] Four welding points 10 are provided on the insulating electrode 4, and are welded to the flexible circuit board 7 through the four welding points 10, with low contact impedance and reliable connection.

[0037] A silver layer is plated on the back of the insulating electrode 4. The silver layer is produced by screen printing process and then polarized to ensure the consistent electrode orientation and realize the optimization of the magnetic field.

[0038] The flexible substrate 1 is a non-woven fabric, which has biocompatibility and is porous, facilitating the pores to breathe, reducing the production of sweat, and preventing the insulating electrode 4 from falling off the human body. A plurality of side wings 1-1 are provided on the flexible substrate 1 to increase the contact area with the human body. In addition, glutinous rice glue or other harmless glue liquids can be provided on the flexible substrate 1 and / or the side wings 1-1 to firmly fix it on the human body.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrode patch, characterized in that: It includes a flexible substrate (1), a flexible circuit board (7), and a plurality of foam pads (2) and electrode sheets fixedly provided on the flexible substrate (1). A plurality of positioning holes (2-1) are provided on the foam pads (2), and the electrode sheets are arranged in the positioning holes (2-1), and the electrode sheets are welded to the flexible circuit board (7); The electrode sheet includes an insulating gasket (3) and an insulating electrode (4) bonded together by a sealant (5). The insulating electrode (4) is made of ceramic material and generates capacitance or displacement current when applying the current of an induced electric field. A silver layer is plated on the back of the insulating electrode (4); the insulating gasket (3) is fixedly provided on the flexible substrate (1), and the flexible circuit board (7) is located between the insulating gasket (3) and the insulating electrode (4) and is welded to the insulating electrode (4); four welding points (10) are provided on the insulating electrode (4), and are welded to the flexible circuit board (7) through the four welding points (10); A through hole (4-1) is provided in the middle of the insulating electrode (4), and a thermistor (9) is provided at the through hole (4-1), and the thermistor (9) is electrically connected to the flexible circuit board (7); The surfaces of the foam pads (2) and the electrode sheets are coated with a gel (6).

2. The electrode patch according to claim 1, characterized in that: It further includes a transmission line (12). A shielding layer is provided on the transmission line (12). An anti-disconnection solder joint (8) is provided at the connection end of the flexible circuit board (7). The anti-disconnection solder joint (8) is connected to the shielding layer to prevent the circuit on the flexible circuit board (7) from being pulled off. A connecting sleeve (11) is further sleeved on the welding part of the flexible circuit board (7) and the transmission line (12).

3. The electrode patch according to claim 1, wherein: The thickness of the gel (6) is 0.5 mm - 2 mm, and it has conductivity, viscosity and biocompatibility.

4. An electrode patch according to claim 1, wherein: The flexible substrate (1) is non-woven fabric.

5. An electrode patch according to claim 1, characterized in that: Nine electrode sheets are arranged in a rectangular array. The thermistor (9) is provided on nine or eight of the nine electrode sheets around the perimeter. The resistance value range of the thermistor (9) is 5K - 20k, the B value range is 3000K - 5000K, and the package specification is selected as 0603 or 0402.

6. The electrode patch according to claim 5, wherein: 10 or 11 circuits are provided on the flexible circuit board (7), two of which are respectively the input line and the output line of the insulating electrode (4), and the remaining circuits are respectively the control lines of the thermistor (9).

7. An electrode patch according to claim 1, characterized in that: The insulating electrode (4) is circular, with a diameter of 18 - 22 mm, a thickness of 0.8 - 1.2 mm, and the aperture of the middle through hole (4-1) is 2.5 - 3.5 mm.

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