CN217162275U - Radio frequency energy output circuit and radio frequency ablation equipment - Google Patents
Radio frequency energy output circuit and radio frequency ablation equipment Download PDFInfo
- Publication number
- CN217162275U CN217162275U CN202123396564.6U CN202123396564U CN217162275U CN 217162275 U CN217162275 U CN 217162275U CN 202123396564 U CN202123396564 U CN 202123396564U CN 217162275 U CN217162275 U CN 217162275U
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- constant current
- square wave
- module
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model provides a radio frequency energy output circuit and a radio frequency ablation device, which comprises a square wave generating module, a constant current source and a radio frequency generating module; the radio frequency generation module is connected with the output end of the square wave generation module and the constant current source; the square wave generating module is used for generating square wave signals; the input side of the constant current source is connected with alternating current, and the constant current source is configured to be capable of converting the alternating current into the constant current signal; the radio frequency generation module is configured to output a radio frequency signal to a load terminal based on the square wave signal and the constant current signal.
Description
Technical Field
The utility model relates to a radio frequency melts the field, especially relates to a radio frequency energy output circuit and radio frequency melts equipment.
Background
The radiofrequency ablation device can be provided with a radiofrequency generating module for generating a radiofrequency signal, and specifically, the radiofrequency generating module can output the radiofrequency signal based on a power supply input to the radiofrequency generating module.
The existing traditional technology: according to the radio frequency ablation principle, the radio frequency current intensity is the fundamental factor influencing the radio frequency ablation effect. However, in the constant-voltage and constant-power ablation process, the intensity of the radio-frequency current changes dynamically, the output is unstable, the ablation effect is not ideal, and even the human body safety problem is caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a radio frequency energy output circuit and radio frequency ablation equipment to solve at constant voltage, constant power ablation in-process, radio frequency current intensity dynamic change, the unstable problem of output.
According to a first aspect of the present invention, there is provided a radio frequency energy output circuit of a radio frequency ablation apparatus, comprising a square wave generating module, a constant current source, and a radio frequency generating module;
the radio frequency generation module is connected with the output end of the square wave generation module and the constant current source;
the square wave generating module is used for generating square wave signals;
the input side of the constant current source is connected with alternating current, and the constant current source is configured to be capable of converting the alternating current into the constant current signal;
the radio frequency generation module is configured to output a radio frequency signal to a load terminal based on the square wave signal and the constant current signal.
Optionally, the device further comprises a control module and an impedance detection module, wherein the control module is connected with the impedance detection module and an impedance adjusting device;
the impedance detection module is configured to detect current impedance information of the load end, and send the current impedance information to the control module, where the current impedance information can represent the current impedance of the load end;
the control module is connected with the impedance adjusting device to feed back a flow speed adjusting signal corresponding to the current impedance information to the impedance adjusting device;
the impedance adjusting device is configured to be capable of controlling and adjusting the flow rate of the heat exchange medium delivered in the radiofrequency ablation device based on the flow rate adjusting signal.
Optionally, the impedance adjusting device comprises an injection pump for injecting the heat exchange medium.
Optionally, the constant current source is configured to be able to output the constant current signal under the control of the control module.
Optionally, the control module is connected to an INFO pin of the constant current source, and controls a magnitude of the constant current signal output by the constant current source.
Optionally, the square wave generating module includes a first PWM unit and a second PWM unit; the square wave signals comprise a first square wave signal and a second square wave signal;
the control module is connected with the first PWM unit to control the PWM unit to output the first square wave signal;
the control module is connected with the second PWM unit to control the PWM unit to output the second square wave signal; the first square wave signal and the second square wave signal are opposite in phase.
Optionally, the radio frequency generating module includes a radio frequency transformer, a first switching tube, a second switching tube, a first capacitor, a second capacitor, a first resistor, and a second resistor;
the control end of the first switch tube is connected with the first square wave signal, the first end of the first switch tube is connected with the first end of a first capacitor, and the second end of the first switch tube is grounded; the first end of the first resistor is connected with the first end of the first switching tube, and the second end of the first resistor is grounded; the first end of the first capacitor is connected with the first end of the radio frequency transformer, and the second end of the first capacitor is grounded;
the control end of the second switching tube is connected with the second square wave signal, the first end of the second switching tube is connected with the first end of the second capacitor, and the second end of the second switching tube is grounded; the first end of the second resistor is connected with the first end of the second switching tube, and the second end of the second resistor is grounded; the first end of the second capacitor is connected with the third end of the radio frequency transformer, and the second end of the second capacitor is grounded;
the second end of the radio frequency transformer is directly or indirectly connected to the output of the constant current source;
optionally, the radio frequency generator further comprises a filtering module, and the filtering module is connected between the constant current source and the radio frequency generating module.
Optionally, the filtering module includes a first filtering capacitor, a second filtering capacitor and a filtering inductor;
the first end of the first filter capacitor is connected with the output end of the constant current source, and the second end of the first filter capacitor is grounded; the first end of the filter inductor is connected with the first end of the first filter capacitor, and the second end of the filter inductor is connected with the first end of the second capacitor; the first end of the second filter capacitor is connected with the radio frequency generation module, and the second end of the second filter capacitor is grounded.
According to a second aspect of the present invention, there is provided a radiofrequency ablation device, comprising the radiofrequency energy output circuit provided by the first aspect of the present invention.
The utility model provides a radio frequency energy output circuit and radio frequency ablation equipment can realize the invariable output of radio frequency electric current effective value. By setting a proper value and outputting stable radio frequency current, the damage of excessive radio frequency ablation current to human physiological tissues can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic circuit block diagram of a constant current source based rf energy generating circuit provided in an exemplary embodiment of the present invention;
fig. 2 is a schematic block diagram of a circuit of a control module and an impedance detection module provided in an exemplary embodiment of the invention;
fig. 3 is a schematic circuit diagram of a constant current source provided in an exemplary embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a square wave generation module and a radio frequency generation module provided in an exemplary embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a filtering module provided in an exemplary embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic block diagram of a first embodiment of the present invention, illustrating a constant current source-based rf power generation circuit.
The radio frequency energy output circuit for the radio frequency ablation device comprises a square wave generating module 10, a constant current source 20 and a radio frequency generating module 30;
the radio frequency generation module 30 is connected with the output end of the square wave generation module 10 and the constant current source 20;
the square wave generating module 10 is used for generating a square wave signal;
the input side of the constant current source 20 is connected with an alternating current, and the constant current source 20 is configured to be capable of converting the alternating current into the constant current signal;
the rf generating module 30 is configured to output an rf signal to a load terminal based on the square wave signal and the constant current signal.
The radio frequency energy generating circuit based on the constant current source provided by the embodiment further comprises a control module 40, an impedance detection module 50, wherein the control module 40 is connected with the impedance detection module 50 and an impedance adjusting device 70;
the impedance detection module 50 is configured to detect current impedance information of the load end, and send the current impedance information to the control module, where the current impedance information can represent the current impedance of the load end;
the control module 40 is connected to the impedance adjusting device 70 to feed back a flow rate adjusting signal corresponding to the current impedance information to the impedance adjusting device;
the impedance adjusting device 70 is configured to be capable of controlling and adjusting the flow rate of the heat exchange medium delivered in the radiofrequency ablation device based on the flow rate adjusting signal.
The impedance adjusting means 70 comprises an injection pump for injecting the heat exchange medium.
Referring to fig. 2, the impedance detection module 50 is connected to the control module 40 and the load end output by the rf generation module 30, and is configured to detect electrical signal parameters of the load end to obtain impedance information, where the electrical signal parameters include voltage, current, and the like.
According to the formula P ═ I 2 And R, wherein P is the output power of the radio frequency signal, R is the impedance value measured by the load end, and I is the effective value of the radio frequency current measured by the load end. In the embodiment, the current value is constant, the output power of the radio frequency signal can be adjusted by adjusting the impedance value, and meanwhile, the function of controlling the ablation temperature can be achieved, so that the success rate of the radio frequency ablation operation is improved. The impedance detection module 50 detects the current impedance value information of the load end during the transmission of the radio frequency signal, and sends the detected current impedance information to the control module 40, the control module 40 feeds a flow rate adjustment signal corresponding to the current impedance information back to the impedance adjustment device according to the current impedance information, and the impedance adjustment device adjusts the flow rate of the heat exchange medium in the radio frequency ablation device according to the flow rate adjustment signal, specifically, adjusts the flow rate of the physiological saline (i.e., a heat exchange medium) injected by the injection pump, so as to perform the impedance adjustment function.
Wherein the flow rate characterized by the flow rate adjustment signal may be increased (i.e., increasing the perfusion flow rate) when the current impedance information increases (i.e., the impedance continues to increase), and the flow rate characterized by the flow rate adjustment signal may be decreased (i.e., decreasing the perfusion flow rate) when the current impedance information decreases (i.e., the impedance continues to decrease).
As shown in fig. 3, the input side of the constant current source 20 is connected with an alternating current, and the constant current source 30 outputs the constant current signal under the control of the control module 40;
the control module 40 is connected to the INFO pin of the constant current source 20, and controls the magnitude of the constant current signal output by the constant current source 20.
The constant current source 20 is composed of a power supply device and peripheral circuits thereof, a power supply signal is input to the constant current source 20 through an ACIN pin, the control module 40 is connected with INFO and SGND pins of the power supply device, the control module 40 controls the magnitude of a constant current value output by the constant current source 20, and the constant current value is input to the radio frequency generating module 30.
Referring to fig. 4, the square wave generating module 10 includes a first PWM unit and a second PWM unit;
the control module 40 is connected to the first PWM unit to control the PWM unit to output the first square wave signal PWMH;
the control module 40 is connected to the second PWM unit to control the PWM unit to output the second square wave signal PWML; the first square wave signal PWMH is opposite in phase to the second square wave signal PWML.
The square wave generating module 10 can be realized by a pulse modulator PWM unit and can also be generated by circuit building, for example, a hysteresis comparator and an RC loop formed by an operational amplifier can be used to generate a square wave signal. The radio frequency generating module 30 comprises a radio frequency transformer T1, a first switching tube Q1, a second switching tube Q2, a first capacitor C1, a second capacitor C1, a first resistor R1 and a second resistor R2;
a control end of the first switching tube Q1 is connected to the first square wave signal PWMH, a first end of the first switching tube Q1 is connected to a first end of a first capacitor C1, and a second end of the first switching tube Q1 is grounded; a first end of the first resistor R1 is connected to a first end of the first switch tube Q1, and a second end of the first resistor R1 is grounded; a first end of the first capacitor C1 is connected with a first end of the radio frequency transformer, and a second end of the first capacitor C1 is grounded;
a control end of the second switching tube Q2 is connected to the second square wave signal PWML, a first end of the second switching tube Q2 is connected to a first end of a second capacitor C2, and a second end of the second switching tube Q2 is grounded; a first end of the second resistor R2 is connected to a first end of the second switch tube Q2, and a second end of the second resistor R2 is grounded; the first end of the second capacitor C2 is connected with the third end of the radio frequency transformer, and the second end of the second capacitor C2 is grounded;
the second end of the rf transformer T1 is connected directly or indirectly to the output of the constant current source 20;
the radio frequency generation module 30 is configured to be able to: generating the radio frequency signal based on the first square wave signal PWMH, the second square wave signal PWML, and the constant current signal.
Referring to fig. 4, the rf generating module 30 includes: a first switch tube Q1, a second switch tube Q2, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a radio frequency transformer T1;
in this embodiment, the used switching tubes are MOSFET tubes, gates of the first switching tube Q1 and the second switching tube Q2 are respectively connected to the first square wave signal PWMH and the second square wave signal PWML, drains of the first switching tube Q1 and the second switching tube Q2 are respectively connected to a first input end and a third input end of the radio frequency transformer T1, and sources of the first switching tube Q1 and the second switching tube Q2 are grounded; a first end of the first resistor R1 is connected with the gate of the first switch tube Q1, and a second end of the first resistor is grounded; a first end of the second resistor R2 is connected with the gate of the second switch tube Q2, and a second end of the second resistor is grounded; first ends of the first capacitor C1 and the second capacitor C2 are respectively connected to drains of the first switching tube Q1 and the second switching tube Q2, and second ends of the first capacitor C1 and the first capacitor C2 are grounded; the working principle of the radio frequency generating module 30 may be, for example:
the first square wave signal PWMH outputs high level to drive the MOSFET to open the first switch tube Q1, the power module outputs voltage, the voltage is oscillated by a primary coil of a radio frequency transformer T1 and the first capacitor C1 to generate a sine wave, and the sine wave is converted to a secondary side by the radio frequency transformer T1; the second square wave signal PWML outputs a high level to drive the MOS transistor to turn on the second switching transistor Q2, and oscillates through the primary coil of the rf transformer T1 and the first capacitor C2 to generate a sine wave, which is transformed to the secondary side through the rf transformer T1. At this time, the control module 40 controls the constant current source 20 to output the constant current signal into the primary coil of the RF transformer T1, and generates a sine wave current signal having the same frequency as the first square wave signal PWMH and the second square wave signal PWML at the secondary coil of the RF transformer T1, wherein the amplitude and the effective value of the sine wave current signal are constant, and the sine wave current signal is output to the first connection terminal RF _ P and the second connection terminal RF _ N of the load terminal.
As shown in fig. 5, the present invention provides a rf energy generating circuit for rf ablation, further comprising a filtering module 60; the filtering module 60 is connected between the constant current source 20 and the rf generating module 30. The filtering module 60 comprises a first filtering capacitor C3, a second filtering capacitor C4 and a filtering inductor L;
the positive electrode of the first filter capacitor C3 is connected with the first end of an inductor L, and the negative electrode of the first filter capacitor C3 is grounded; the anode of the second filter capacitor C4 is connected to the second end of the inductor L, and the cathode of the second filter capacitor C4 is grounded; the first end of the inductor L is connected to the output of the constant current source 30, and the second end of the inductor L is connected to the rf generating module. The filter circuit consisting of the inductor L, the first filter capacitor C3 and the second filter capacitor C4 achieves filtering of the constant current signal provided by the constant current source.
In one embodiment, a protection circuit may be further disposed between the constant current source 20 and the rf generation module 30 to trigger the constant current signal not to be transmitted to the rf generation module 30 when the voltage and/or power of the constant current signal is higher than a safety threshold, and specifically, the protection circuit may include a detection unit connected to the output side of the constant current source 20 to detect the voltage and/or power of the constant current signal, and a protection switch connected between the constant current source 20 and the rf generation module 30, where the detection unit is connected to a control terminal of the protection switch to control the protection switch to turn off when the voltage and/or power of the constant current signal is higher than the safety threshold.
In a further example, the detection unit may include a voltage detection portion, a current detection portion and a multiplier, the voltage detection portion is connected to an output side of the constant current source to detect a voltage of the constant current signal, the current detection portion is connected to the output side of the constant current source to detect a current of the constant current signal, the current detection portion and the voltage detection portion are connected to the multiplier, the multiplier obtains a detection result of the current detection portion and the voltage detection portion and then calculates a product of the current and the voltage to obtain a power signal representing power, an output end of the multiplier is connected to a comparator, the comparator is configured to compare the power signal with a safety reference signal corresponding to a safety threshold, when the power signal is higher than the safety reference signal, it may be understood that the power is higher than the safety threshold, and an output end of the comparator may be connected to a control end of the protection switch.
To sum up, the utility model provides a radio frequency energy output circuit and radio frequency melt equipment can realize the invariable output of radio frequency current effective value. By setting a proper value and outputting stable radio frequency current, the damage of excessive radio frequency ablation current to human physiological tissues can be avoided. Meanwhile, impedance is adjusted according to the radio frequency current output, the radio frequency output power and the ablation temperature are controlled, and the success rate of radio frequency ablation operation can be improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (10)
1. A radio frequency energy output circuit of radio frequency ablation equipment is characterized by comprising a square wave generating module, a constant current source and a radio frequency generating module;
the radio frequency generation module is connected with the output end of the square wave generation module and the constant current source;
the square wave generating module is used for generating square wave signals;
the input side of the constant current source is connected with alternating current, and the constant current source is configured to be capable of converting the alternating current into a constant current signal;
the radio frequency generation module is configured to output a radio frequency signal to a load terminal based on the square wave signal and the constant current signal.
2. The rf energy output circuit of claim 1, further comprising a control module, an impedance detection module, wherein the control module connects the impedance detection module with an impedance adjustment device;
the impedance detection module is configured to detect current impedance information of the load end, and send the current impedance information to the control module, where the current impedance information can represent the current impedance of the load end;
the control module is connected with the impedance adjusting device to feed back a flow speed adjusting signal corresponding to the current impedance information to the impedance adjusting device;
the impedance adjusting device is configured to control the flow rate of the heat exchange medium delivered in the radiofrequency ablation device based on the flow rate adjusting signal.
3. The rf energy output circuit of claim 2, wherein the impedance adjustment device comprises a syringe pump for injecting the heat exchange medium.
4. The rf energy output circuit of claim 1, wherein the constant current source is configured to be capable of outputting the constant current signal under control of a control module.
5. The RF energy output circuit according to claim 4, wherein the control module is connected to the INFO pin of the constant current source for controlling the magnitude of the constant current signal output by the constant current source.
6. The rf energy output circuit of claim 1, further comprising a control module, the square wave generation module comprising: a first PWM unit and a second PWM unit; the square wave signals comprise a first square wave signal and a second square wave signal;
the control module is connected with the first PWM unit to control the PWM unit to output the first square wave signal;
the control module is connected with the second PWM unit to control the PWM unit to output the second square wave signal.
7. The RF energy output circuit of claim 6, wherein the RF generating module comprises an RF transformer, a first switch tube, a second switch tube, a first capacitor, a second capacitor, a first resistor and a second resistor;
the control end of the first switch tube is connected to the first square wave signal, the first end of the first switch tube is connected with the first end of a first capacitor, and the second end of the first switch tube is grounded; the first end of the first resistor is connected with the first end of the first switching tube, and the second end of the first resistor is grounded; the first end of the first capacitor is connected with the first end of the radio frequency transformer, and the second end of the first capacitor is grounded;
the control end of the second switching tube is connected to the second square wave signal, the first end of the second switching tube is connected with the first end of the second capacitor, and the second end of the second switching tube is grounded; the first end of the second resistor is connected with the first end of the second switching tube, and the second end of the second resistor is grounded; the first end of the second capacitor is connected with the third end of the radio frequency transformer, and the second end of the second capacitor is grounded;
the second end of the radio frequency transformer is directly or indirectly connected to the output side of the constant current source.
8. The rf energy output circuit of claim 1, further comprising a filtering module connected between the constant current source and the rf generating module.
9. The rf energy output circuit of claim 1, wherein the filter module comprises a first filter capacitor, a second filter capacitor, and a filter inductor;
the first end of the first filter capacitor is connected with the output end of the constant current source, and the second end of the first filter capacitor is grounded; the first end of the filter inductor is connected with the first end of the first filter capacitor, and the second end of the filter inductor is connected with the first end of the second capacitor; the first end of the second filter capacitor is connected with the radio frequency generation module, and the second end of the second filter capacitor is grounded.
10. A radio frequency ablation device comprising the radio frequency energy output circuit of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123396564.6U CN217162275U (en) | 2021-12-27 | 2021-12-27 | Radio frequency energy output circuit and radio frequency ablation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123396564.6U CN217162275U (en) | 2021-12-27 | 2021-12-27 | Radio frequency energy output circuit and radio frequency ablation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217162275U true CN217162275U (en) | 2022-08-12 |
Family
ID=82730691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123396564.6U Active CN217162275U (en) | 2021-12-27 | 2021-12-27 | Radio frequency energy output circuit and radio frequency ablation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217162275U (en) |
-
2021
- 2021-12-27 CN CN202123396564.6U patent/CN217162275U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10105173B2 (en) | Radio frequency generator and a method of generating radio frequency energy utilizing the radio frequency generator | |
| EP2777582B1 (en) | System for power control of electrosurgical resonant inverters | |
| EP2826433B1 (en) | Electrosurgical generator with continuously and arbitrarily variable crest factor | |
| US20190148981A1 (en) | Wireless charging circuit, wireless charging system, and circuit control method | |
| US9270202B2 (en) | Constant power inverter with crest factor control | |
| US6238387B1 (en) | Electrosurgical generator | |
| CN105305827B (en) | Secondary-side dynamic load detects and communication equipment | |
| EP2826434B1 (en) | Electrosurgical generators | |
| US8098472B2 (en) | System and method for controlling an electromagnetic field generator | |
| CN102497115B (en) | Normal-pressure low-temperature plasma power supply and power supply device | |
| CN106165283B (en) | Electronic device and control method for high frequency AC-DC conversion | |
| CN105932859A (en) | Radio-frequency power supply for mass spectrometer | |
| CN101877580A (en) | High voltage pulse generation device | |
| CN217162275U (en) | Radio frequency energy output circuit and radio frequency ablation equipment | |
| US10637298B2 (en) | Wireless power transfer system | |
| CN214805313U (en) | Radio frequency generating circuit, device and radio frequency host | |
| CN110247643A (en) | A kind of maximum pulse width protection of transmitter and maximum duty cycle protect analog circuit | |
| US6839253B2 (en) | Multi-period cycle-alternative switching mode power supply control device | |
| CN209948799U (en) | Wireless power transmission current sampling processing system with magnetic field regulation and control function | |
| Celentano et al. | A Primary-side Maximum Efficiency Transfer Solution in Wireless Power Transfer Systems: Theory and Validation | |
| CN111050454B (en) | Filament power supply and radiotherapy equipment | |
| CN111244930A (en) | Direct current power supply and distribution device and direct current power supply and distribution system applying same | |
| Giesselmann et al. | Compact HV-capacitor charger | |
| KR20220136177A (en) | Electromedical power generator | |
| CN117653311A (en) | High-voltage nanosecond electric pulse impedance matching method and ablation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |