Tumor electric field therapy device and its electrode patch

Abstract

This invention provides a tumor electric field therapy device and its electrode patch. The electrode patch includes an electrode array, which in turn includes a flexible circuit board. The flexible circuit board has thirteen main sections, each with a conductive pad. Four main sections located at the corners, two at the center, and two at the edges (not at the corners) are each equipped with a grounding pad and a signal pad. The flexible circuit board has one AC trace, one grounding trace, and eight signal traces. The AC trace is located on the front of the flexible circuit board and electrically connected to each conductive pad. The grounding trace is mainly located on the back of the flexible circuit board and electrically connected to each grounding pad. The eight signal traces are also mainly located on the back of the flexible circuit board and electrically connected to each signal pad. This invention's tumor electric field therapy device and electrode patch, by selectively incorporating temperature sensors, can both meet temperature measurement requirements and simplify wiring.

Description

Technical Field

[0001] This utility model relates to a tumor electric field therapy device and its electrode patch, belonging to the field of medical device technology. Background Technology

[0002] Currently, the main treatments for tumors include surgery, radiotherapy, and chemotherapy, but all have their drawbacks. For example, radiotherapy and chemotherapy can cause side effects and kill normal cells. Using electric fields to treat tumors is also at the forefront of research. Tumor electric field therapy (TEF) is a tumor treatment method that uses a special electric field generator to produce low-intensity, medium-to-high-frequency alternating electric fields to interfere with the mitotic process of tumor cells. Studies have shown that TEF is effective in treating glioblastoma, non-small cell lung cancer, and malignant pleural mesothelioma. The alternating electric field applied in this treatment method can affect the aggregation of microtubules, prevent spindle formation, inhibit mitosis, and induce apoptosis in cancer cells.

[0003] Tumor electric field therapy devices mainly include an electric field generator and electrode patches electrically connected to the electric field generator. The electrode patches include an electrode array for transmitting alternating electric fields. The electrode array includes a flexible circuit board, multiple dielectric elements disposed on the skin-facing side of the flexible circuit board, and multiple temperature sensors for monitoring the temperature of each dielectric element. The flexible circuit board has several conductive traces to transmit alternating current signals to each dielectric element and direct current signals to each temperature sensor. Due to the large number of temperature sensors, the existing wiring scheme for the flexible circuit board is relatively complex, which has a certain impact on the manufacturing of the flexible circuit board.

[0004] Therefore, it is indeed necessary to provide an improved electrode patch and tumor electric field therapy device to overcome the problems existing in the above-mentioned electrode patch and tumor electric field therapy device. Utility Model Content

[0005] This invention provides a tumor electric field therapy device and its electrode patch, which selectively incorporates a temperature sensor to simplify the wiring scheme of the flexible circuit board while meeting the temperature measurement requirements.

[0006] The electrode patch of this utility model is achieved through the following technical solution: An electrode patch for tumor electric field therapy includes an electrode array and wires. The electrode array includes a flexible circuit board. The flexible circuit board has a plurality of main bodies spaced apart, a plurality of connecting parts connecting adjacent main bodies, and a wiring part connected to the wires. The plurality of main bodies are thirteen in number and arranged in five rows and five columns. The first and last rows each have two main bodies located in the second and fourth columns, respectively. The middle three rows each have three main bodies located in the first, third, and fifth columns, respectively. Each main body has a conductive disk, wherein the four main bodies located at the corners of the electrode array and the four main bodies located at the center of the electrode array have conductive disks. Each of the two main body portions and the two main body portions located at the non-corner edge of the electrode array is further provided with a ground pad and a signal pad; the flexible circuit board is provided with one AC trace, one ground trace and eight signal traces. The AC trace is located on the front side of the flexible circuit board and connected to each of the conductive pads. The ground trace is located on the back side of the flexible circuit board and passes through the corresponding main body portion and connects to each of the ground pads. The eight signal traces are arranged on the back side of the flexible circuit board and pass through the corresponding main body portion and connect to each of the signal pads respectively; the wiring portion is provided with several gold fingers, and the end of each conductive trace is connected to a corresponding gold finger.

[0007] Furthermore, the electrode array also has several dielectric elements and several temperature sensors. The dielectric elements are disposed on the front side of each of the main bodies and electrically connected to the conductive pad. The temperature sensors are disposed on the front side of the corresponding main body and electrically connected to the ground pad and the signal pad, respectively.

[0008] Furthermore, the wiring portion is provided with five gold fingers on its front and back sides respectively. The AC trace extends from one of the gold fingers on the front side of the wiring portion and extends on the front side of the flexible circuit board. The grounding trace extends from one of the gold fingers on the back side of the wiring portion and mainly extends on the back side of the flexible circuit board.

[0009] Furthermore, the four signal traces are respectively guided out from the four gold fingers on the front of the connector and extend to the back of the connector on the back of the flexible circuit board. The other four signal traces are respectively guided out from the four gold fingers on the back of the connector and extend to the back of the flexible circuit board.

[0010] Furthermore, a small portion of the grounding trace is jumpered to the front side of the flexible circuit board.

[0011] Furthermore, the main body and the corresponding dielectric elements together form an electrode unit, and all the temperature sensors are arranged in a centrally symmetrical manner with respect to the center of the matrix formed by the thirteen electrode units.

[0012] Furthermore, the thirteen electrode units are numbered C1 to C13 from top to bottom and from left to right, and the temperature sensor is provided on the main body of each electrode unit C1, C4, C5, C6, C8, C9, C10, and C13.

[0013] Furthermore, the wiring portion extends downward from the main body of the electrode unit C10, and the grounding trace and all the signal traces pass through the electrode unit C10.

[0014] Furthermore, it also includes a backing, several support members, and several adhesive members. The electrode array is adhered to the backing, the support members are adhered to the backing and surround each of the electrode units, and the adhesive members cover each of the support members and each of the electrode units. The electrode array is also provided with several insulating plates fixed to the back of each of the main body parts.

[0015] This utility model is also achieved through the following technical solution: a tumor electric field therapy device, including an electric field generator and the aforementioned electrode patch electrically connected to the electric field generator.

[0016] This utility model of tumor electric field therapy device and its electrode patch, while meeting the temperature measurement requirements, can reduce the number of temperature sensors by selectively setting temperature sensors, simplify the wiring scheme of flexible circuit boards, and basically only set AC traces on the front side of the flexible circuit board, so that the line width of the AC traces can be set thicker, thereby reducing the heat generation of the AC traces. Attached Figure Description

[0017] Figure 1 This is a three-dimensional assembly diagram of the electrode patches in one embodiment of the tumor electric field therapy device of this utility model;

[0018] Figure 2 for Figure 1 3D exploded view of the electrode patch;

[0019] Figure 3 for Figure 2 An exploded three-dimensional view of the electrode array;

[0020] Figure 4 for Figure 3 A plan view of the flexible circuit board containing the electrode array;

[0021] Figure 5 for Figure 2 A plan view of the electrode array of the electrode patch in the image;

[0022] Figure 6 for Figure 5 Wiring diagram of the front side of the flexible circuit board;

[0023] Figure 7 for Figure 5 The back wiring diagram of the flexible circuit board.

[0024] Explanation of reference numerals in the attached figures:

[0025] Electrode patch 100, electrode array 1, electrode unit 10, flexible circuit board 11, main body 111, connecting part 112, wiring part 113, gold finger 1131, conductive pad 114, conductive core 1141, open space 115, solder pad 116, grounding solder pad 1161, signal solder pad 1162, insulating board 12, dielectric element 13, temperature sensor 14, conductive trace L, AC trace L1, grounding trace L2, signal trace L3, backing 2, support 3, through hole 31, adhesive 4, wire 5, heat shrink tubing 51. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses, systems, devices, and methods consistent with some aspects of this invention.

[0027] The tumor electric field therapy device of this invention includes multiple pairs of electrode patches 100 and an electric field generator (not shown) electrically connected to each electrode patch 100. The electric field generator (not shown) provides an alternating current signal and transmits it to each pair of electrode patches 100. After receiving the alternating current signal, each pair of electrode patches 100 forms an alternating electric field between the two. The multiple pairs of electrode patches 100 alternately apply alternating electric fields in different directions to the tumor site of the patient, which can produce a certain therapeutic effect on the tumor.

[0028] refer to Figure 1 and Figure 2 As shown, the electrode patch 100 in this embodiment is used for its... Figure 1 The electrode patch 100 is applied to the patient's torso with the center facing upwards, corresponding to the tumor site. The electrode patch 100 includes an electrode array 1, a backing 2, several support members 3, several adhesive members 4, and a lead wire 5.

[0029] The backing 2 is made of a flexible, breathable, and insulating material, preferably a mesh fabric, and is characterized by its softness, lightness, moisture resistance, and breathability. A biocompatible adhesive is provided on the front side of the backing 2, allowing the electrode patch 100 to be tightly adhered to the patient's skin surface corresponding to the tumor site. The electrode array 1 is generally grid-shaped and is adhered to the backing 2 via the biocompatible adhesive (not shown). The support 3 is made of a soft material, preferably foam, and is also adhered to the backing 2 via the biocompatible adhesive (not shown) and positioned around each grid point of the electrode array 1. The adhesive 4 is double-sided adhesive, preferably conductive gel, and covers the corresponding areas of the support 3 and the electrode array 1, directly contacting the patient's skin surface to maintain skin moisture and relieve local pressure. The wire 5 can be electrically connected to the electric field generator (not shown) and the electrode array 1 to provide an alternating current signal to the electrode array 1. The electrode patch 100 applies an alternating electric field to the tumor site of the patient through the electrode array 1 to interfere with or prevent the mitosis of the tumor cells of the patient, thereby achieving the purpose of treating the tumor.

[0030] Combination Figure 3 and Figure 4 As shown, the electrode array 1 includes a flexible circuit board 11, several insulating plates 12 disposed on the back of the flexible circuit board 11, and several dielectric elements 13 disposed on the front of the flexible circuit board 11, wherein the front of the flexible circuit board 11 faces the patient. The flexible circuit board 11 includes several main body portions 111 spaced apart, several connecting portions 112, and a wiring portion 113. The connecting portions 112 are used to connect two adjacent main body portions 111, and the wiring portion 113 is used to electrically connect with the wire 5. A conductive disk 114 is provided on the front of the main body portion 111, and the conductive disk 114 includes four circularly arranged conductive cores 1141. The dielectric elements 13 are disposed on the front of the main body portion 111 by welding to the conductive disk 114 and are electrically connected to the conductive disk 114.

[0031] In this embodiment, the electrode array 1 has thirteen main bodies 111 distributed in a five-row, five-column array. The first and last rows each have two main bodies 111, located in the second and fourth columns respectively; the middle three rows each have three main bodies 111, located in the first, third, and fifth columns respectively. The distribution of the thirteen main bodies 111 is both row-oriented and column-oriented symmetrical. Each main body 111 is connected to multiple adjacent main bodies 111 via connecting parts 112. Multiple adjacent main bodies 111 and their corresponding connecting parts 112 together form an open space 115, allowing the skin covered by the electrode patch 100 to breathe freely after the electrode patch 100 is applied to the patient's body surface. The two main bodies 111 in the last row are disconnected for the wiring part 113 to pass through. The connector 113 has a row of gold fingers 1131 on its front and back ends, respectively. Each gold finger 1131 is soldered to the corresponding wire core (not shown) of the conductor 5. A heat shrink tubing 51 is fitted at the connection between the connector 113 and the conductor 5 (see figure). Figure 2 To protect the connection.

[0032] Both the insulating plate 12 and the dielectric element 13 are provided corresponding to the main body 111. The insulating plate 12 is preferably an epoxy glass cloth laminate. Before the dielectric element 13 is welded to the main body 111, it is adhered to the back of the main body 111 with glue, which can strengthen the main body 111, improve the flatness of the welding surface between the main body 111 and the dielectric element 13, and improve the welding quality. The dielectric element 13 is a high dielectric constant material, which has the conductivity characteristics of impeding the conduction of direct current and allowing the passage of alternating current, thus ensuring human safety. In other embodiments, the dielectric element 13 can also be in other forms, such as a high dielectric constant and low dielectric loss polymer dielectric layer made of a thin film material with non-fixed crystal orientation, high flexibility, and high toughness, which can be formed on the main body 111 by vapor deposition, sputtering or ion plating vapor deposition, printing, spraying, or casting. An electric field generator (not shown) transmits an alternating current signal to a dielectric element 13 via a flexible circuit board 11. The dielectric element 13 receives the alternating current signal and forms an alternating electric field applied to the patient between paired electrode patches 100. After the dielectric element 13 is soldered to the conductive pad 114, its peripheral edges can be sealed with sealant (not shown).

[0033] The main body 111, insulating plate 12, and dielectric element 13 are all circular sheets with approximately the same diameter. Their centers are located on the same straight line and together form the electrode unit 10. The insulating plate 12 is optional for the electrode unit 10; it can be omitted. Figure 5 As shown, the electrode array 1 includes thirteen spaced-apart electrode units 10, with adjacent electrode units 10 interconnected via connecting portions 112. Figure 2As shown, the support member 3 is provided with a through hole 31, and is arranged around the electrode unit 10 in such a way that the through hole 31 surrounds the electrode unit 10.

[0034] refer to Figure 5 As shown, the electrode array 1 is also provided with several temperature sensors 14, which are located at the center of some electrode units 10. Combined with... Figure 6 As shown, the front of the main body 111 also has a pair of pads 116 at the center of the conductive pad 114. Each pair of pads 116 includes a ground pad 1161 and a signal pad 1162. The temperature sensor 14 has a ground terminal (not shown) soldered to the ground pad 1161 and a signal terminal (not shown) soldered to the signal pad 1162. The temperature sensor 14 is positioned at the center of the front of the main body 111 by soldering to the corresponding pair of pads 116. Note that although each main body 111 has pads 116, not every pad 116 has a temperature sensor 14 soldered to it. The distribution of the temperature sensor 14 will be described later. The dielectric element 13 has a through hole 131 at its center to avoid and accommodate the temperature sensor 14. After the temperature sensor 14 is soldered to the pad 116, sealant is injected through the through hole 131 of the dielectric element 13 to seal the temperature sensor 14.

[0035] An electric field generator (not shown) provides a DC signal to a temperature sensor 14 via a flexible circuit board 11. The temperature sensor 14 is preferably a thermistor, which monitors the temperature of the corresponding electrode unit 10 and feeds it back to the electric field generator (not shown). When the monitored temperature exceeds the upper limit of the human body's safe temperature, the AC signal is reduced or turned off in time to avoid the corresponding electrode unit 10 causing low-temperature burns to the human body. When the detected temperature is lower than a preset minimum value, the strength of the AC signal is increased to increase the strength of the alternating electric field and enhance the treatment effect.

[0036] refer to Figures 5 to 7 As shown, for ease of description, in terms of spatial structure, the thirteen electrode units 10 are sequentially numbered C1 to C13. Specifically, electrode units C1 and C2 are located in the first row of electrode array 1, electrode units C3, C4, and C5 are located in the second row, electrode units C6, C7, and C8 are located in the third row, electrode units C9, C10, and C11 are located in the fourth row, and electrode units C12 and C13 are located in the fifth row. Please note... Figures 6 to 7 Although there is no dielectric element 13, the positions of each main body 111 are the positions of each electrode unit 10, therefore... Figure 6 and Figure 7The diagram above is labeled C1 to C13. The entire electrode array 1 is roughly octagonal in shape. Eight electrode units C1, C2, C3, C5, C9, C11, C12, and C13 are located at the corners of electrode array 1, three electrode units C4, C7, and C10 are located at the center of electrode array 1, and the remaining two electrode units C6 and C8 are located at the edges, not at the corners. During use, due to the edge effect, the electrode units C1, C2, C3, C5, C9, C11, C12, and C13 located at the corners experience the fastest temperature rise and the highest temperature, while the electrode units C4, C7, and C10 located at the center experience the slowest temperature rise and the lowest temperature. The electrode units C6 and C8 located at the edges, not at the corners, have temperatures between the highest and lowest temperatures.

[0037] In this embodiment, the electrode array 1 is provided with eight temperature sensors 14. These eight temperature sensors 14 are respectively located on the main body 111 of eight of the thirteen electrode units 10. Specifically, they are located on the main body 111 of four electrode units C1, C5, C9, and C13 located at the corners, on the main body 111 of two electrode units C4 and C10 located at the center, and on the main body 11 of two electrode units C6 and C8 located at the edge (not at the corners). These eight main body parts 111 can also be called temperature measuring main bodies. These eight main body parts 111 involve three different positions of the electrode array 1: corners, center, and edge (not at the corners). The corresponding temperature values ​​collected include the highest value, the lowest value, and the intermediate value, which can more accurately reflect the temperature of each electrode unit 10 of the electrode array 1. It can realize the simultaneous monitoring of the lowest temperature, intermediate temperature, and highest temperature with a small number of temperature sensors 14, which avoids high temperature burns and avoids the effect of treatment due to excessively low electric field strength. These eight electrode units 10 are also centrally symmetrically distributed with respect to the center of the matrix formed by the entire electrode units 10, making the overall weight distribution of the electrode array 1 more balanced.

[0038] refer to Figure 6 and Figure 7 As shown, the flexible circuit board 11 has multiple conductive traces L. In this embodiment, the multiple conductive traces L include one AC trace L1, one ground trace L2, and eight signal traces L3, for a total of ten conductive traces L. Each row of gold fingers 1131 on the front and back of the wiring part 113 has five gold fingers 1131, for a total of ten gold fingers 1131. The end of each conductive trace L corresponds one-to-one with and is electrically connected to the corresponding gold finger 1131.

[0039] AC trace L1 is located on the front of the flexible circuit board 11 and is led out from a gold finger 1131 on the front of the wiring part 113. It extends along the wiring part 113, the corresponding main body part 111 and the corresponding connecting part 112 and is electrically connected to each conductive pad 114 respectively, so as to transmit the AC signal to each conductive pad 114 and then to each dielectric element 13, so that each dielectric element 13 receives the AC signal to generate an alternating electric field for treatment.

[0040] For ease of description, the following description will omit the connection portion 112 between two adjacent electrode units 10 connected by the AC trace L1 path, and will only describe the AC trace L1 path through the corresponding electrode unit 10. AC trace L1 extends upward from the connector 113 to electrode unit C10, passes through electrode unit C9 to electrode unit C12, then turns back from electrode unit C12, passes through electrode unit C9 to electrode unit C6, then turns back from electrode unit C6, passes through electrode unit C9 to electrode unit C10; then from electrode unit C10, it passes through electrode units C7, C4, and C3 to electrode unit C1, then turns back from electrode unit C1, passes through electrode units C3, C4, and C5 to electrode unit C2, then turns back from electrode unit C2, passes through electrode units C5, C4, C7, C10, and C11 to electrode unit C8, then turns back from electrode unit C8, passes through electrode unit C11 to electrode unit C13, and finally turns back from electrode unit C13, passes through electrode unit C11 and returns to electrode unit C10. AC trace L1 is electrically connected to the corresponding conductive core 1141 when passing through each electrode unit 10. The connecting portion 112, which has an AC trace L1, has two segments of AC trace L1 disposed on opposite sides thereon. The two segments of AC trace L1 extend along the length direction of the connecting portion 112 to connect the conductive cores 1141 on different main body portions 111. It should be noted that when the AC trace L1 connects the corresponding conductive cores 1141 of two adjacent electrode units 10, it also needs to pass through the connecting portion 112 of the two adjacent electrode units 10.

[0041] refer to Figure 7 As shown, the grounding trace L2 is mainly located on the back of the flexible circuit board 11. The grounding trace L2 extends from a corresponding gold finger 1131 on the back of the wiring portion 113, along the wiring portion 113, the corresponding main body portion 111, and the corresponding connecting portion 112, and is electrically connected to the grounding pads 1161 on the corresponding main body portion 111 where the temperature sensor 14 is located, so that all the grounding pads 1161 electrically connected to each temperature sensor 14 are grounded. Note that most of the grounding trace L2 is on the back of the flexible circuit board 11, but a small portion needs to extend to the front of the flexible circuit board 11 for jumper wiring; that is, a small portion of the grounding trace L2 is located on the front of the flexible circuit board 11 (see reference). Figure 6 (The red line in the image).

[0042] The specific wiring scheme of the grounding trace L2 is described below from the front view of the flexible circuit board 11: The grounding trace L2 is led out from a corresponding gold finger 1131 on the back of the end of the connector 113 and extends upward to the electrode unit C10, where it is electrically connected to the corresponding grounding pad 1161 of the electrode unit C10. Then, at the electrode unit C10, it splits into three branches. One branch passes through the electrode unit C10 and is laid on the front of the flexible circuit board 11, then extends to the right to the electrode unit C11. At the electrode unit C11, it passes back to the back of the flexible circuit board 11 and splits into two branches that extend to the electrode units C8 and C13 respectively, and are connected to the corresponding grounding pads 1161 on the electrode units C8 and C13 respectively. The other branch passes through the electrode unit C10 to the flexible circuit board 11. The flexible circuit board 11 extends from the front side to the left to electrode unit C9, then passes back to the back side of the flexible circuit board 11 at electrode unit C9 and connects to the corresponding ground pad 1161 on electrode unit C9. It then continues upward to electrode unit C6 and connects to the corresponding ground pad 1161 on electrode unit C6. Finally, after a jumper at electrode unit C10, it extends upward through electrode unit C7 to electrode unit C4 and connects to the corresponding ground pad 1161 on electrode unit C4. Then, at electrode unit C4, it splits into two branches: one extending to the right to electrode unit C5 and connecting to the corresponding ground pad 1161 on electrode unit C5; the other extending to the left through electrode unit C3 and to electrode unit C1, connecting to the corresponding ground pad 1161 on electrode unit C1. Note that the ground trace L2 must pass from the back side of the corresponding main body 111 through the main body 111 to its front side and connect to the corresponding ground pad 1161.

[0043] refer to Figure 7 and combined Figure 6 As shown, the eight signal traces L3 are mainly located on the back of the flexible circuit board 11. Four of the signal traces L3 are led out from the four gold fingers 1131 on the front of the connector 113 and pass through the connector 113 to the back of the connector 113. The other four signal traces L3 are led out from the four gold fingers 1131 on the back of the connector 113. The eight signal traces L3 are basically all on the back of the flexible circuit board 11. Each signal trace L3 extends along the connector 113, the corresponding main body 111, and the corresponding connecting part 112 to the back of the main body 111 of the corresponding electrode unit 10 where the temperature sensor 14 is located. Then, it passes through the corresponding main body 111 and is electrically connected to the corresponding signal pad 1162 to transmit DC signals to the signal pads 1162 electrically connected to the temperature sensor 14.

[0044] The specific wiring scheme of signal traces L3 is described below from the front view of the flexible circuit board 11: All eight signal traces L3 extend upward from the connector 113 to the electrode unit C10 and then continue to extend from the electrode unit C10. Specifically, one signal trace L3 is led out from the corresponding gold finger 1131 at the end of the back of the connector 113 and extends upward to the electrode unit C10, where it is electrically connected to the signal pad 1162 of the electrode unit 10; another signal trace L3 is led out from the corresponding gold finger 1131 at the end of the front of the connector 113, passes through the back of the connector 113, and then extends upward to the electrode unit C10. Electrode unit C10 extends to the right, passing through electrode unit C11 to electrode unit C8 and connecting to the signal pad 1162 of electrode unit C8; one signal trace L3 is led out from the corresponding gold finger 1131 at the end of the front of the connector 113, passes through the back of the connector 113, first extends upward to electrode unit C10, then continues to extend to the right, passing through electrode unit C11 to electrode unit C13 and connecting to the signal pad 1162 of electrode unit C13; one signal trace L3 is led out from the corresponding gold finger 1131 at the end of the back of the connector 113 and extends upward to electrode unit C10. The signal trace L3 extends to the left and connects to the signal pad 1162 of electrode unit C9; another signal trace L3 is led out from the corresponding gold finger 1131 at the end of the back of the connector 113 and extends upward to electrode unit C10, then continues to extend to the left through electrode unit C9 to electrode unit C6 and connects to the signal pad 1162 of electrode unit C6; another signal trace L3 is led out from the corresponding gold finger 1131 at the end of the front of the connector 113, passes through the back of the connector 113, extends upward through electrode units C10 and C7 to electrode unit C4 and connects to electrode unit C4. The signal pad 1162 is connected; one signal trace L3 is led out from the corresponding gold finger 1131 at the end of the front of the connector 113, passes through the back of the connector 113, extends upward through electrode units C10, C7, and C4, then extends to the right to electrode unit C5 and connects to the signal pad 1162 of electrode unit C5; another signal trace L3 is led out from the corresponding gold finger 1131 at the end of the back of the connector 113, extends upward through electrode units C10, C7, and C4, then extends to the left through electrode unit C3 to electrode unit C1 and connects to the signal pad 1162 of electrode unit C1. Please note that the signal trace L3 needs to pass through the back of the main body 111 of each corresponding electrode unit 10 to its front and connect to the corresponding signal pad 1162.

[0045] The electrode patch 100 of this utility model selects eight of the thirteen electrode units 10 and sets temperature sensors 14 on the main body 111 of each electrode unit 10. The specific positions of the temperature sensors 14 are located at the corners, centers, and non-corner edges of the electrode array 1. This allows monitoring of the highest, lowest, and intermediate temperature values ​​in each electrode unit 10, which not only meets the temperature measurement requirements but also simplifies the overall wiring scheme by reducing the number of temperature sensors 14. At the same time, the grounding trace L2 and all signal traces L3 are located on the back of the flexible circuit board 11. The front of the flexible circuit board 11 is basically only the AC trace L1, so the line width of the corresponding AC trace L1 can be set thicker, which can reduce the heat generation of the AC trace L1.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electrode patch for tumor electric field therapy, comprising an electrode array and wires, the electrode array comprising a flexible circuit board, the flexible circuit board having a plurality of main bodies spaced apart, a plurality of connecting portions connecting adjacent main bodies, and a wiring portion connected to the wires, the plurality of main bodies being thirteen in five rows and five columns, with two in the first and last rows respectively located in the second and fourth columns, and three in each of the middle three rows respectively located in the first, third, and fifth columns, characterized in that: The main body is provided with conductive pads, and each of the four main body parts located at the corners of the electrode array, the two main body parts located at the center of the electrode array, and the two main body parts located at the non-corner edges of the electrode array is also provided with a ground pad and a signal pad; the flexible circuit board is provided with a plurality of conductive traces, including one AC trace, one ground trace, and eight signal traces. The AC trace is located on the front side of the flexible circuit board and connected to each of the conductive pads. The ground trace is located on the back side of the flexible circuit board and passes through the corresponding main body part and connects to each of the ground pads. The eight signal traces are arranged on the back side of the flexible circuit board and pass through the corresponding main body part and connect to each of the signal pads respectively; the wiring part is provided with a plurality of gold fingers, and the end of each of the conductive traces is connected to a corresponding gold finger.

2. The electrode patch of claim 1, wherein, The electrode array also has several dielectric elements and several temperature sensors. The dielectric elements are disposed on the front side of each of the main bodies and electrically connected to the conductive pad. The temperature sensors are disposed on the front side of the corresponding main body and electrically connected to the ground pad and the signal pad, respectively.

3. The electrode patch of claim 2, wherein, The connector has five gold fingers on its front and back sides. The AC trace extends from one of the gold fingers on the front side of the connector and extends on the front side of the flexible circuit board. The ground trace extends from one of the gold fingers on the back side of the connector and mainly extends on the back side of the flexible circuit board.

4. The electrode patch of claim 3, wherein, The four signal traces originate from the four gold fingers on the front of the connector and extend to the back of the connector on the back of the flexible circuit board. The other four signal traces originate from the four gold fingers on the back of the connector and extend to the back of the flexible circuit board.

5. The electrode patch of claim 3, wherein, A small portion of the grounding trace is jumpered to the front of the flexible circuit board.

6. The electrode patch of claim 2, wherein, The main body and the corresponding dielectric elements together form an electrode unit, and all the temperature sensors are arranged in a centrally symmetrical manner with respect to the center of the matrix formed by the thirteen electrode units.

7. The electrode patch of claim 6, wherein, In terms of spatial structure, the thirteen electrode units are numbered C1 to C13 from top to bottom and from left to right, and the temperature sensor is provided on the main body of electrode units C1, C4, C5, C6, C8, C9, C10 and C13 respectively.

8. The electrode patch of claim 7, wherein, The wiring portion extends downward from the main body of the electrode unit C10, and the grounding trace and all the signal traces pass through the electrode unit C10.

9. The electrode patch of claim 7, wherein, It also includes a backing, several support members and several adhesive members. The electrode array is adhered to the backing, the support members are adhered to the backing and surround each of the electrode units, and the adhesive members cover each of the support members and each of the electrode units. The electrode array is also provided with several insulating plates fixed to the back of each of the main body parts.

10. A tumor electric field treatment device, characterized by, It includes an electric field generator and an electrode patch as described in any one of claims 1 to 9, which is electrically connected to the electric field generator.

Images