Electrode switching circuit for ablation treatment equipment

Abstract

The invention discloses an electrode switching circuit for ablation treatment equipment, which belongs to the field of ablation treatment and comprises a controller, an optocoupler, an MOS (Metal Oxide Semiconductor) tube and an electrode, a control unit is arranged in the controller; two control ports of the control unit are respectively connected with one ends of the two groups of optocouplers; the other end of the optocoupler is respectively connected with two groups of MOS (Metal Oxide Semiconductor) tubes, and the MOS tubes are connected with an electrode and an alternating current input end; and two control ends of the control unit are used for controlling switching of one electrode. The circuit is simple, and each electrode can be flexibly switched between the two ends of alternating current; short circuit caused by the fact that the electrodes are simultaneously connected to the L end and the N end of alternating current is prevented; the problem of current leakage after the electrode is turned off is solved.

Description

Technical Field

[0001] The invention relates to the field of ablation therapy, and in particular to an electrode switching circuit for ablation therapy equipment. Background Art

[0002] The electric field ablation therapy device uses an innovative AC electric field ablation therapy technology. It is a new type of portable ablation therapy device that integrates mechanical, electronic, and software technologies. The electric field ablation therapy device transmits a low-field strength AC electric field to the lesion site in the body through electrodes, acting on the microtubules of the diseased cells, interfering with the mitosis of the diseased cells, causing the affected diseased cells to apoptosis and inhibiting their growth. As a non-invasive anti-mitotic therapy, the electric field ablation therapy device has good selectivity. By adjusting different field strengths and frequencies, it only acts on the diseased cells to interfere with their mitosis, while having little effect on the surrounding normal cells. With its local release mode and anti-mitotic effect, compared with traditional treatments such as surgery, radiotherapy, and drug therapy, the electric field ablation therapy device is more convenient and non-invasive, with fewer side effects.

[0003] The electric field ablation device is mainly composed of circuits, electrodes, wires, shells and other components. Patients generally need to wear it for treatment according to doctor's orders. Experiments have shown that multiple sets of electrodes need to be placed during ablation treatment, and the direction of the electric field between each two electrodes needs to be constantly changed to achieve a good treatment effect and little thermal damage. Therefore, each electrode needs to be configured to connect one end of the alternating current, i.e., the L end, or the other end of the alternating current, i.e., the N end, at different times, or to turn off the electrode and disconnect it from the alternating current.

[0004] The existing practice is to connect each electrode to one end of the alternating current. The disadvantage of this approach is that when the electric field strength is high, the treatment will cause heat accumulation and burns to the skin. When the electric field strength is low, the treatment effect is poor. Due to the different shapes of the lesions, it is difficult to strike a balance between efficacy and low side effects. Summary of the invention

[0005] With regard to the above-mentioned problems existing in the prior art, an object of the present invention is to provide an electrode switching circuit for an ablation treatment device to solve the above-mentioned problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An electrode switching circuit for an ablation treatment device comprises a controller, an optical coupler, a MOS tube and an electrode; a control unit is arranged inside the controller, and two control ports of the control unit are respectively connected to one end of two groups of optical couplers; the other ends of the optical couplers are respectively connected to two groups of MOS tubes, and the MOS tubes are connected to the electrode and an AC input end; the two control ends of the control unit are used to control the switching of an electrode.

[0008] As a further solution of the present invention: the two control ports of the control unit include a control port ctrl_1 and a control port ctrl_2 of the controller, the control port ctrl_1 is connected to one end of the resistor R1, the other end of the resistor R1 is simultaneously connected to the anode of the optocoupler U1 and the cathode of the optocoupler U2, and the control port ctrl_2 is simultaneously connected to the anode of the optocoupler U2 and the cathode of the optocoupler U1.

[0009] As a further solution of the present invention: the emitter of the optical coupler U1 is simultaneously connected to one end of the resistor R2, the gate of the MOS transistor Q2A, and the gate of the MOS transistor Q12B; the other end of the resistor R2 is grounded;

[0010] The emitter of the optical coupler U2 is connected to one end of the resistor R3, the gate of the MOS transistor Q1A, and the gate of the MOS transistor Q1B at the same time; the other end of the resistor R3 is grounded.

[0011] As a further solution of the present invention: the drain of the MOS tube Q2A is connected to the electrode A, and the drain of the MOS tube Q2B is connected to the AC input terminal N; the drain of the MOS tube Q1A is connected to the electrode A, and the drain of the MOS tube Q1B is connected to the AC input terminal L.

[0012] As a further solution of the present invention: the collector of the optical coupler U1 and the collector of the optical coupler U2 are both connected to a power source.

[0013] As a further solution of the present invention: the source of the MOS transistor Q1A and the source of the MOS transistor Q1B are grounded.

[0014] As a further solution of the present invention: the source of the MOS transistor Q1A and the source of the MOS transistor Q1B are grounded.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention utilizes the combined action of a pair of optical couplers and four MOSs of a control chip to control one electrode. The circuit is simple, and each electrode can be flexibly switched between the two ends of the alternating current. The short circuit caused by the electrode being simultaneously connected to the L end and the N end of the alternating current is prevented. The problem of leakage current after the electrode is turned off is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a circuit diagram of an electrode switching circuit for an ablation treatment device disclosed in an embodiment. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", and "connected" should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1 , an electrode switching circuit for an ablation treatment device, comprising an electrode A, an optical coupler U1, an optical coupler U2, a MOS tube Q1A, a MOS tube Q1B, a MOS tube Q2A and a MOS tube Q2B;

[0021] The collector of the optocoupler U1 and the collector of the optocoupler U2 are both connected to the power supply; the emitter of the optocoupler U1 is simultaneously connected to one end of the resistor R2, the gate of the MOS tube Q2A, and the gate of the MOS tube Q12B; the other end of the resistor R2 is grounded; the drain of the MOS tube Q2A is connected to the electrode A, the drain of the MOS tube Q2B is connected to the AC input terminal N, and the source of the MOS tube Q1A and the source of the MOS tube Q1B are grounded;

[0022] The emitter of the optocoupler U2 is simultaneously connected to one end of the resistor R3, the gate of the MOS tube Q1A, and the gate of the MOS tube Q1B; the other end of the resistor R3 is grounded; the drain of the MOS tube Q1A is connected to the electrode A, the drain of the MOS tube Q1B is connected to the AC input terminal L, and the source of the MOS tube Q1A and the source of the MOS tube Q1B are grounded;

[0023] The control port ctrl_1 of the controller is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the anode of the optocoupler U1 and the cathode of the optocoupler U2, and the control port ctrl_2 of the controller is connected to the anode of the optocoupler U2 and the cathode of the optocoupler U1;

[0024] like Figure 1 As shown, A is one of the multiple electrodes of the electric field ablation therapy device, and L and N are the input terminals of the alternating current therapy.

[0025] When the control signal ctrl_1 is at a high level and ctrl_2 is at a low level, the upper optical coupler is turned on, and the A electrode and the N terminal are connected.

[0026] When the control signal ctrl_1 is low and ctrl_2 is high, the optical coupler below is turned on, and the A electrode and the L terminal are connected.

[0027] When the control signals ctrl_1 and ctrl_2 are both at low level, the two optocouplers are disconnected, and the A electrode is disconnected from the circuit.

[0028] When the control signals ctrl_1 and ctrl_2 are both at high level, the two optocouplers are disconnected, and the A electrode is disconnected from the circuit.

[0029] From the above, it can be seen that the two signals ctrl_1 and ctrl_2 can realize the switching of electrode A between the L end and the N end of the AC. Regardless of the level of trl_1 and ctrl_2, electrode A will not be connected to the L end and the N end of the AC at the same time. When electrode A is turned off, electrode A and the L end and N end of the AC have two MOS in the off state, thus solving the leakage current problem when turned off.

[0030] An electrode is controlled by the combined action of a pair of optocouplers and four MOS on the control chip. The circuit is simple and each electrode can be flexibly switched between the two ends of the alternating current. This prevents the short circuit caused by the electrode being connected to the L and N ends of the alternating current at the same time. This solves the problem of leakage current after the electrode is turned off.

[0031] The electric field ablation therapy device contains multiple electrodes, which need to be configured as the live wire L end or the neutral wire N end of the AC treatment energy.

[0032] The present invention provides an innovative control solution combining hardware and software, which realizes the switching function of electrodes by controlling the corresponding electronic circuits through the control unit software; at the same time, it prevents the short circuit of L and N of the AC circuit caused by connecting the L end and the N end of the AC therapeutic electric energy at the same time; the polarity of the electrode can also be controlled by the control unit software; compared with general electronic switches, the present invention also solves the leakage current problem of the AC power after shutdown.

[0033] Specifically, the MOS is used to realize the on / off of the electrode and the live wire L end or the neutral wire N end of the AC treatment power;

[0034] By adding an optocoupler circuit, it is ensured that there will be no short circuit;

[0035] By adding 4 MOS to control the on / off between one electrode and the AC treatment power, the problem of not being able to completely shut down the AC power is solved;

[0036] By adding a control unit to control the conduction and cutoff of the optical coupler, and using the programmable control function of the control unit, flexible control from the software end is achieved. The control unit controls the output of signals to "ctrl-1" and "ctrl-2" to indirectly control the electrodes to connect to the L end of the AC therapeutic energy or the N end of the AC therapeutic energy.

[0037] The present invention provides an innovative control solution of hardware and software coordination, which realizes the arbitrary switching function of electrodes by controlling the corresponding electronic circuits through the control unit software; at the same time, it prevents the short circuit of L and N of the AC circuit caused by one electrode being connected to the L end and the N end of the AC therapeutic electric energy at the same time; the polarity of the electrode is controlled by the control unit software; compared with the general electronic switch, the present invention adopts two MOS tubes to control one electrode and solves the leakage current problem of the AC power after shutdown.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention, and any reference numerals in the claims should not be considered as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electrode switching circuit for an ablation treatment device, characterized in that: It includes a controller, an optical coupler, a MOS tube and an electrode; the controller is provided with a control unit inside, and the two control ports of the control unit are respectively connected to one end of two groups of optical couplers; the other ends of the optical couplers are respectively connected to the two groups of MOS tubes, and the MOS tubes are connected to the electrodes and the AC input end; the two control ends of the control unit are used to control the switching of one electrode.

2. The electrode switching circuit for ablation therapy equipment according to claim 1, characterized in that: The two control ports of the control unit include a control port ctrl_1 and a control port ctrl_2 of the controller, the control port ctrl_1 is connected to one end of the resistor R1, the other end of the resistor R1 is simultaneously connected to the anode of the optocoupler U1 and the cathode of the optocoupler U2, and the control port ctrl_2 is simultaneously connected to the anode of the optocoupler U2 and the cathode of the optocoupler U1.

3. The electrode switching circuit for ablation therapy equipment according to claim 2, characterized in that: The emitter of the optical coupler U1 is simultaneously connected to one end of the resistor R2, the gate of the MOS transistor Q2A, and the gate of the MOS transistor Q12B; the other end of the resistor R2 is grounded; The emitter of the optical coupler U2 is connected to one end of the resistor R3, the gate of the MOS transistor Q1A, and the gate of the MOS transistor Q1B at the same time; the other end of the resistor R3 is grounded.

4. The electrode switching circuit for ablation therapy equipment according to claim 3, characterized in that: The drain of the MOS transistor Q2A is connected to the electrode A, and the drain of the MOS transistor Q2B is connected to the AC input terminal N; the drain of the MOS transistor Q1A is connected to the electrode A, and the drain of the MOS transistor Q1B is connected to the AC input terminal L.

5. The electrode switching circuit for ablation therapy equipment according to claim 4, characterized in that: The collector of the optocoupler U1 and the collector of the optocoupler U2 are both connected to a power source.

6. The electrode switching circuit for ablation therapy equipment according to claim 5, characterized in that: The source of the MOS transistor Q1A and the source of the MOS transistor Q1B are grounded.

7. The electrode switching circuit for ablation therapy equipment according to claim 6, characterized in that: The source of the MOS transistor Q1A and the source of the MOS transistor Q1B are grounded.

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