Tumor electric field treatment device and electrode patch thereof

Abstract

The utility model provides tumor electric field treatment device and electrode patch thereof, electrode patch includes flexible circuit board, and the flexible circuit board is equipped with twenty and is four rows six column arrangement main part, eight main parts are located in the corner, four main parts are located in the central region, define the rest eight main parts as intermediate main part. Main part is equipped with conductive disc, and intermediate main part is equipped with one ground pad and one signal pad. Flexible circuit board is equipped with a plurality of conductive tracks, and the conductive track includes one way AC trace, one way ground trace and eight way signal trace, and AC trace sets up in the front of flexible circuit board and is connected with each conductive disc, and ground trace also sets up in the front of flexible circuit board and is connected with each ground pad, and eight way signal trace is arranged in the back of flexible circuit board and is connected with each signal pad respectively. The utility model tumor electric field treatment device and electrode patch select all intermediate main part installation temperature sensor, can satisfy the temperature measurement demand again and can simplify the overall wiring scheme.

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 temperature. Several conductive traces are provided on the flexible circuit board 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, wherein the electrode patch is provided with a flexible circuit board with simple wiring.

[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. There are twenty main bodies arranged in four rows and six columns. The first and last rows each have four main bodies located in the second to fifth columns, respectively. The two middle rows each have six main bodies located in the first to sixth columns, respectively. Eight main bodies are located at the corners of the flexible circuit board, four main bodies are located in the central area of ​​the flexible circuit board, and the remaining eight main bodies are defined as... The main body is a middle main body, which is provided with conductive pads. The middle main body also has a ground pad and a signal pad. The flexible circuit board is provided with a number 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 also located on the front side of the flexible circuit board and connected to each of the ground pads. The eight signal traces are arranged on the back side of the flexible circuit board and are connected to each of the signal pads after passing through the corresponding middle main body. The wiring part is provided with a number of gold fingers, and the end of each conductive trace is connected to the corresponding gold finger.

[0007] Furthermore, the electrode array is provided with a plurality of dielectric elements and a plurality of temperature sensors. The dielectric elements are disposed on the front side of the main body and electrically connected to the conductive pad. The temperature sensors are disposed on the front side of the intermediate main body and are provided with a ground terminal electrically connected to the ground pad and a signal terminal electrically connected to the signal pad.

[0008] Furthermore, the wiring portion is provided with five gold fingers on its front and back sides respectively, and the AC trace and the ground trace are respectively guided out from one of the gold fingers on the front side of the wiring portion.

[0009] Furthermore, three of the signal traces are respectively guided out from the front of the connector by a gold hand and extend to the back of the flexible circuit board after passing through the back of the connector; the other five signal traces are respectively guided out from the back of the connector by a gold hand and extend to the back of the flexible circuit board.

[0010] Furthermore, the main body has a via on each side of the signal pad, and the signal trace is connected to both vias and the signal pad.

[0011] Furthermore, the main body and the corresponding dielectric element together form an electrode unit, and the twenty electrode units surround and form multiple open spaces. The wiring part is T-shaped and spans between the two connecting parts that extend upward in the column at the center of the electrode array.

[0012] 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.

[0013] Furthermore, the electrode array is also provided with several insulating plates fixed to the back of each of the main body parts.

[0014] Furthermore, the eight intermediate main bodies are respectively located in the first row and third column, the first row and fourth column, the second row and second column, the second row and fifth column, the third row and second column, the third row and fifth column, the fourth row and third column, and the fourth row and fourth column of the electrode array.

[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 selects to install temperature sensors on the entire middle main body, which can not only meet the temperature measurement requirements, but also simplify the overall wiring scheme. 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; Figure 2 for Figure 1 3D exploded view of the electrode patch; Figure 3 for Figure 2 An exploded three-dimensional view of the electrode array; Figure 4 for Figure 3 A plan view of the flexible circuit board of the electrode array and the temperature sensor in the image. Figure 5 for Figure 2 A plan view of the electrode array of the electrode patch in the image; Figure 6 for Figure 5 Wiring diagram of the front side of the flexible circuit board; Figure 7 for Figure 5 Backside wiring diagram of the flexible circuit board; Figure 8 for Figure 6A magnified view of point A in the image.

[0018] Explanation of reference numerals in the attached figures: 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, grounding piece 1132, conductive pad 114, conductive core 1141, solder pad 115, grounding solder pad 1151, signal solder pad 1152, open space 116, via 117, insulating plate 12, dielectric element 13, temperature sensor 14, conductive trace L, AC trace L1, grounding trace L2, signal trace L3, first signal trace L3-1, second signal trace L3-2, third signal trace L3-3, fourth signal trace L3-4, fifth signal trace L3-5, sixth signal trace L3-6, seventh signal trace L3-7, eighth signal trace L3-8, backing 2, support 3, through hole 31, adhesive 4, wire 5, heat shrink tubing 51. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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 electrical 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.

[0023] 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.

[0024] In this embodiment, the electrode array 1 has twenty main bodies 111 distributed in a four-row, six-column array. The first and last rows each have four main bodies 111, located in the second to fifth columns respectively; the middle two rows each have six main bodies 111, located in the first to sixth columns respectively. The distribution of the twenty 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. The two main bodies 111 in the middle of the third row are disconnected to allow the wiring part 113 to pass through; similarly, the two main bodies 111 in the middle of the second row are also disconnected. The wiring part 113 is T-shaped and spans between two upward-extending connecting parts 112 at the center of the flexible circuit board 11. 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.

[0025] 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.

[0026] 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).

[0027] 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 5As shown, the electrode array 1 includes twenty spaced-apart electrode units 10. Adjacent electrode units 10 are interconnected via connecting portions 112. Multiple adjacent main body portions 111 are spaced apart and together form an open space 116, 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. Figure 2 As 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.

[0028] 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, temperature sensors 14 are selectively disposed on the main body 111 of a portion of the electrode unit 10. A pair of pads 115 are also provided on the front side of the main body 111 where the temperature sensor 14 is disposed, at the center of the conductive pad 114. Each pair of pads 115 includes a ground pad 1151 and a signal pad 1152. The temperature sensor 14 has a ground terminal (not shown) soldered to the ground pad 1151 and a signal terminal (not shown) soldered to the signal pad 1152. The temperature sensor 14 is disposed at the center of the front side of the corresponding main body 111 by soldering to the pair of pads 115. Correspondingly, 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 pads 115, sealant is injected through the through hole 131 of the dielectric element 13 to seal the temperature sensor 14.

[0029] 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.

[0030] In this embodiment, there are only eight temperature sensors 14, which are disposed on eight of the twenty main body parts 111. (See reference) Figures 5 to 7 As shown, for ease of description, the twenty electrode units 10 are numbered C1 to C20 sequentially. Please note that... 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 is labeled C1 to C20. These eight temperature sensors 14 are respectively disposed on electrode units C2, C3, C6, C9, C12, C15, C18, and C19. Due to the edge effect during use, the electrode units 10 located at the corners of the electrode array 1 have the highest temperature, while the electrode units 10 located in the central region of the electrode array 1 have the lowest temperature. Since the electrode array 1 is approximately octagonal, eight electrode units C1, C4, C5, C10, C11, C16, C17, and C20 are located at the corners, four electrode units C7, C8, C13, and C14 are located in the central region, and the remaining eight electrode units C2, C3, C6, C9, C12, C15, C18, and C19 are located between the corners and the center, and can be called intermediate electrode units. The main body 111 of the intermediate electrode units can be called the intermediate main body. The electrode array 1 avoids its corners and central area. Temperature sensors 14 are set on the middle electrode units C2, C3, C6, C9, C12, C15, C18 and C19, that is, on each middle main body 111. This can take into account the temperature of the electrode units 10 located in the central area of ​​the electrode patch 100 and the electrode units 10 located at the edge of the electrode patch 100. This can more reasonably reflect the approximate temperature range of each electrode unit 10 of the electrode patch 100. It can achieve the purpose of simultaneously monitoring the temperature of each electrode unit 10 with a small number of temperature sensors 14, which avoids high temperature burns and avoids the effect of the treatment due to the electric field strength being too low.

[0031] 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. The end of each conductive trace L is electrically connected to the corresponding gold finger 1131.

[0032] AC trace L1 is located on the front side of the flexible circuit board 11. It is led out from a gold finger 1131 on the front side of the wiring part 113 and extends along the wiring part 113, each main body part 111 and part of the 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 a therapeutic alternating electric field between the corresponding paired electrode patches 100. The AC trace L1 is symmetrically routed on both the left and right sides of the flexible circuit board 11. Taking the left side of the flexible circuit board 11 as an example, the specific routing of the AC trace L1 is as follows: The AC trace L1 starts from the connection part 113, moves left and downwards through electrode unit C13 to electrode unit C18 and then turns back. It then passes through electrode units C13 and C12 to electrode unit C17 and turns back, then through electrode unit C12 to electrode unit C11 and turns back, then through electrode units C12, C13, C7, and C6 to electrode unit C5 and turns back, then through electrode unit C6 to electrode unit C1 and turns back, then through electrode units C6 and C7 to electrode unit C2 and turns back, finally returning to the connection part 113 via electrode unit C7. When the AC trace L1 passes through any two adjacent electrode units 10, it must pass through the connection part 112 connecting those two adjacent electrode units 10. Since the routing of the AC trace L1 on the right side of the flexible circuit board 11 is symmetrical to that on the left side, it will not be described further here. Each connecting portion 112 with an AC trace L1 is provided with a parallel double AC trace L1. The double AC trace L1 is located on opposite sides of the connecting portion 112 and extends along the length of the connecting portion 112 to connect to the corresponding conductive core 1141.

[0033] A grounding trace L2 is also provided on the front side of the flexible circuit board 11. It is led out from a gold finger 1131 on the front side of the wiring portion 113 and extends along the wiring portion 113, the corresponding main body portion 111 and the corresponding connecting portion 112 to each grounding pad 1151 to ground all the grounding pads 1151. The grounding trace L2 is located in the middle of the corresponding connecting portion 112 and extends along the length direction of the connecting portion 112 to connect the corresponding grounding pad 1151. The specific wiring method of the grounding trace L2 is as follows: it is led out from a gold finger 1131 on the front of the connector 113 and jumpered to the back of the connector 113, avoiding the AC trace L1 located at the upper end of the connector 113, and then jumpered to the front of the connector 113. It extends left and right in the clearance groove (unlabeled) formed between the two AC traces L1 on the connector 113. The left branch extends to the connection part 112 located between electrode units C7 and C13 and then splits into two branches: the downward branch continues to extend downward to electrode unit C13 and splits into two branches at electrode unit C13. The two branches extend to electrode unit C12 and C18 respectively via the corresponding connection parts 112 and then connect to the corresponding grounding pads 1151 on electrode unit C12 and electrode unit C18; the upward branch continues to extend upward to electrode unit C7 and splits into two branches at electrode unit C7. The grounding trace L2 is divided into two branches, each extending through a corresponding connecting portion 112 to electrode unit C6 and electrode unit C2, and then connecting to the corresponding grounding pads 1151 on electrode units C6 and C2. The rightward branch extends to the connecting portion 112 between electrode units C8 and C14, then splits into two branches: the downward branch continues downward to electrode unit C14, and at electrode unit C14 splits into two branches, each extending through a corresponding connecting portion 112 to electrode units C15 and C19, and connecting to the corresponding grounding pads 1151 on electrode units C15 and C19; the upward branch continues upward to electrode unit C8, and at electrode unit C8 splits into two branches, each extending to electrode units C9 and C3, and connecting to the corresponding grounding pads 1151 on electrode units C9 and C3. The grounding trace L2 must pass through the connecting portion 112 of each adjacent electrode unit 10 when passing through it. Please note that there is a small jumper section on the wiring part 113 for the grounding trace L2. That is, a small section of the grounding trace L2 is located on the back of the wiring part 113 to avoid the AC trace L1 (see...). Figure 7 (The area shown by the blue line in the diagram). The front of the wiring part 113 also has a grounding plate 1132 at its end. The grounding plate 1132 is welded to the shielding layer (not shown) of the conductor 5. The grounding trace L2 is also electrically connected to the grounding plate 1132.

[0034] refer to Figure 7 and combined Figure 6As shown, the eight signal traces L3 are mainly located on the back of the flexible circuit board 11. Three of the signal traces L3 are led out from the three gold fingers 1131 on the front of the wiring part 113 and pass through to its back. The other five signal traces L3 are led out from the five gold fingers 1131 on the back of the wiring part 113. The eight signal traces L3 are basically on the back of the flexible circuit board 11 and extend along the wiring part 113, the corresponding main body part 111 and the corresponding connecting part 112 to the back of the corresponding main body part 111 with pads 115. Then they pass through the corresponding main body part 111 and are electrically connected to the corresponding signal pads 1152 to transmit DC signals to each signal pad 1152.

[0035] Key reference Figure 7 As shown, this is the wiring diagram of each signal trace L3 on the back of the flexible circuit board 11. The wiring scheme of the eight signal traces L3 is described in detail below from the front view of the flexible circuit board 11: Specifically, signal trace L3 includes eight signal traces L3-1 to L3-8, each corresponding to one of the eight signal pads 1152. The specific wiring method is as follows: the first signal trace L3-1 is led out from a corresponding gold finger 1131 on the back of the end of the connector 113, extends upward and then to the left, passes through the electrode unit C13 and the corresponding connecting part 112 to reach the back of the electrode unit C18, passes through the corresponding main body 111, and is electrically connected to the signal pad 1152 corresponding to the electrode unit C18; the second signal trace L3-2 is led out from a corresponding gold finger 1131 on the front of the end of the connector 113, passes through the back of the connector 113, extends upward and then to the left, passes through the electrode unit C13 and the corresponding connecting part Signal trace 112 reaches the back of electrode unit C12 and penetrates the corresponding main body 111, then electrically connects to the signal pad 1152 corresponding to electrode unit C12; the third signal trace L3-3 is led out from a corresponding gold finger 1131 on the back of the end of the connector 113, then extends upward and to the left, then passes through electrode unit C7 and the corresponding connector 112 to reach the back of electrode unit C6, and after penetrating the corresponding main body 111, it electrically connects to the signal pad 1152 corresponding to electrode unit C6; the fourth signal trace L3-4 is led out from a corresponding gold finger 1131 on the front of the end of the connector 113, penetrates to the back of the connector 113, then extends upward and to the left, then passes through electrode unit C7 and the corresponding connector 112 to reach the back of electrode unit C2 and... After penetrating the corresponding main body 111, the signal trace L3-5 is electrically connected to the signal pad 1152 corresponding to the electrode unit C2; the fifth signal trace L3-5 is led out from a corresponding gold finger 1131 on the back of the end of the connector 113, extends upward and then to the right, passes through the electrode unit C8 and the corresponding connecting part 112 to reach the back of the electrode unit C3, and after penetrating the corresponding main body 111, it is electrically connected to the signal pad 1152 corresponding to the electrode unit C3; the sixth signal trace L3-6 is led out from a corresponding gold finger 1131 on the front of the end of the connector 113, passes through the back of the connector 113, extends upward and then to the right, passes through the electrode unit C8 and the corresponding connecting part 112 to reach the back of the electrode unit C9, and after penetrating the corresponding main body 111, it is electrically connected to the signal pad 1152 corresponding to the electrode unit C2. The signal pad 1152 corresponding to electrode unit C9 is electrically connected; the seventh signal trace L3-7 is led out from a corresponding gold finger 1131 on the back of the end of the wiring part 113, extends upward and then to the right, passes through electrode unit C14 and the corresponding connecting part 112 to reach the back of electrode unit C15, and after passing through the corresponding main body part 111, it is electrically connected to the signal pad 1152 corresponding to electrode unit C15; the eighth signal trace L3-8 is led out from a corresponding gold finger 1131 on the back of the end of the wiring part 113, extends upward and then to the right, passes through electrode unit C14 and the corresponding connecting part 112 to reach the back of electrode unit C19, and after passing through the corresponding main body part 111, it is electrically connected to the signal pad 1152 corresponding to electrode unit C19.

[0036] refer to Figure 8 As shown, the main body 111 is provided with a pair of vias 117 corresponding to the signal pad 1152. The pair of vias 117 are located on opposite sides of the signal pad 1152. The signal trace L3 passes from the back of the main body 111 through one of the vias 117 to the front of the main body 111, and then extends through the signal pad 1152 to the other via 117. The signal trace L3 is connected to both the pair of vias 117 and the signal pad 1152, which makes the connection between the signal trace L3 and the signal pad 1152 more secure and ensures a stable electrical connection between the signal trace L3 and the signal pad 1152.

[0037] The electrode patch 100 of this utility model selects to set temperature sensors 14 on all the middle main body parts 111, which can not only meet the temperature measurement requirements but also simplify the overall wiring scheme. Furthermore, the AC trace L1 and the ground trace L2 are set on the front side of the flexible circuit board, and all the signal traces L3 are set on the back side of the flexible circuit board, which can further simplify the wiring scheme.

[0038] 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 twenty in a four-row, six-column arrangement, with four in the first and last rows respectively located in the second to fifth columns, and six in each of the middle two rows respectively located in the first to sixth columns, wherein eight main bodies are located at the corners of the flexible circuit board, four main bodies are located in the central region of the flexible circuit board, and the remaining eight main bodies are defined as the middle main bodies, characterized in that: The main body is provided with conductive pads, and the intermediate main body 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 also located on the front side of the flexible circuit board and connected to each of the ground pads. The eight signal traces are arranged on the back side of the flexible circuit board and are connected to each of the signal pads after passing through the corresponding intermediate main body; the wiring part is provided with a plurality of gold fingers, and the end of each conductive trace is connected to the corresponding gold finger.

2. The electrode patch according to claim 1, characterized in that, The electrode array is provided with a plurality of dielectric elements and a plurality of temperature sensors. The dielectric elements are disposed on the front side of the main body and electrically connected to the conductive pad. The temperature sensors are disposed on the front side of the intermediate main body and are provided with a ground terminal electrically connected to the ground pad and a signal terminal electrically connected to the signal pad.

3. The electrode patch according to claim 2, characterized in that, The wiring section has five gold fingers on its front and back sides, and the AC trace and the ground trace are respectively guided out from one of the gold fingers on the front side of the wiring section.

4. The electrode patch according to claim 3, characterized in that, Three of the signal traces are respectively guided out from the front of the connector by a gold hand and extend to the back of the flexible circuit board after passing through the back of the connector. The other five signal traces are respectively guided out from the back of the connector by a gold hand and extend to the back of the flexible circuit board.

5. The electrode patch according to claim 2, characterized in that, The main body has a via on each side of the signal pad, and the signal trace is connected to both vias and the signal pad.

6. The electrode patch according to claim 2, characterized in that, The main body and the corresponding dielectric element together form an electrode unit. Twenty electrode units are arranged to form multiple open spaces. The wiring part is T-shaped and spans between two connecting parts that extend upward in the column at the center of the electrode array.

7. The electrode patch according to claim 6, characterized in that, 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.

8. The electrode patch according to claim 7, characterized in that, The electrode array is also provided with several insulating plates fixed to the back of each of the main body parts.

9. The electrode patch according to claim 1, characterized in that, The eight intermediate main bodies are respectively located in the first row and third column, the first row and fourth column, the second row and second column, the second row and fifth column, the third row and second column, the third row and fifth column, the fourth row and third column, and the fourth row and fourth column of the electrode array.

10. A tumor electric field therapy device, characterized in that, 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