High frequency surgical system and method of spraying a coagulation

Abstract

The present application relates to a kind of high-frequency surgical system, comprising main power module, for outputting direct current voltage signal;Master module controls full-bridge drive waveform generation circuit and modulates the direct current voltage signal into pulse signal with predetermined pulse width;Full-bridge output module converts the pulse signal with predetermined pulse width into square wave pulse signal;Power amplifier resonance module is used to receive the square wave pulse signal, and output high-voltage sine wave signal;Power amplifier transformer module is used for further amplifying the high-voltage sine wave signal after resonance and output through load.The output power is low, can output energy without contacting to human body surface, disperses energy, the current of contacting to body surface is low, the coagulation range is large and the coagulation effect is good.

Description

Technical Field

[0001] This invention relates to a high-frequency surgical system and a method for achieving jet coagulation output, belonging to the field of medical device technology. Background Technology

[0002] Since its clinical application in 1920, high-frequency electrosurgical units have undergone more than 90 years of development and are now widely used in modern medicine due to their significant advantages over traditional scalpels. Currently, high-frequency energy platforms are used in many surgical scenarios. Within these platforms, selecting appropriate discharge conditions to improve discharge efficiency, particularly the influence of output voltage and current characteristics on coagulation effects and coagulation area during surgery, has become a technical challenge.

[0003] Traditional high-frequency electrosurgical coagulation uses a modulated pulsed sinusoidal signal as its output. However, the electrode output is a discontinuous sinusoidal signal with a low voltage, requiring the electrode to contact the body surface for coagulation to occur, resulting in a small coagulation area. If the electrode contact area is too large, coagulation may fail. Furthermore, excessive energy upon electrode contact with the body surface can cause wounds that are difficult to heal, posing certain risks. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the first technical solution provided by the present invention is: a high-frequency surgical system, including a main power supply module for outputting DC voltage signals;

[0005] The main control module controls the full-bridge drive waveform generation circuit to modulate the DC voltage signal into a pulse signal with a predetermined pulse width;

[0006] The full-bridge output module converts the pulse signal with a predetermined pulse width into a square wave pulse signal;

[0007] The power amplifier resonant module is used to receive the square wave pulse signal and output a high-voltage sine wave signal;

[0008] The power amplifier transformer module is used to further amplify the resonant high-voltage sine wave signal and output it through the load.

[0009] Furthermore, the power amplifier resonant module also includes a resonant inductor, a first pulse resonant capacitor, and a second DC blocking capacitor for isolating DC components. The resonant inductor, the first DC blocking capacitor, and the first winding of the transformer included in the power amplifier transformer module are connected in series, and the first pulse resonant capacitor and the first winding of the transformer included in the power amplifier transformer module are connected in parallel.

[0010] Furthermore, the power amplifier transformer module also includes a transformer, a third matching capacitor, and a fourth matching capacitor. One end of the third matching capacitor is connected in series with one end of the second winding of the transformer, and the other end of the third matching capacitor is the output terminal of the first resonant power amplifier. One end of the fourth matching capacitor is connected in series with the other end of the second winding of the transformer, and the other end of the fourth matching capacitor is the output terminal of the second resonant power amplifier.

[0011] Furthermore, the power amplifier resonant module also includes at least one load capacitor, one end of which is connected to the first power amplifier transformer output terminal and the other end of which is connected to the second power amplifier transformer output terminal.

[0012] Furthermore, the full-bridge drive waveform generation circuit includes a first resistor, one end of which is connected to the controller, and the other end of which is connected to one end of a first NAND gate. The other end of the first NAND gate is connected to one end of a third NAND gate, and the other end of the third NAND gate is output to the full-bridge output module.

[0013] The second resistor has one end connected to the controller and the other end connected to the second NAND gate. The other end of the second NAND gate is connected to one end of the fourth NAND gate, and the other end of the fourth NAND gate is output to the full-bridge output module.

[0014] The third NAND gate and the fourth NAND gate are connected;

[0015] The third resistor has one end connected to the controller and the other end connected to the third NAND gate and the fourth NAND gate.

[0016] Furthermore, it also includes a resonant output sampling module, which collects the signal from the resonant power amplifier module. The resonant output sampling module outputs a signal to the controller, and the controller adjusts the power output according to the signal.

[0017] Furthermore, the resonant output sampling module is composed of a signal conversion module, a precision rectification module, and a signal amplification module connected in series.

[0018] The second technical solution provided by this invention is: a method for realizing argon gas jet condensation output, characterized in that it includes a main power supply module, an auxiliary power supply module, a full-bridge output module, a power amplifier resonant module, a power amplifier transformer module, a full-bridge drive waveform generation circuit, a resonant output sampling module, a controller, and a load; the method includes...

[0019] Configure the main power module to output a DC voltage signal;

[0020] The DC voltage signal is modulated into a pulse signal with a predetermined pulse width;

[0021] The pulse signal with a predetermined pulse width is transformed into a square wave pulse signal;

[0022] The square wave pulse signal is amplified after resonance and transformed into a sine wave pulse signal;

[0023] The sinusoidal pulse signal is transformed into a higher voltage sinusoidal pulse signal by a transformer;

[0024] The sinusoidal pulse signal is output through the load to ionize the air.

[0025] Furthermore, it also includes an output sampling module to collect signals from the power amplifier resonant module. The controller receives the collected signals and adjusts the output power of the power supply module. The signals include at least one of current, voltage, or power.

[0026] Beneficial effects

[0027] This invention relates to a high-frequency surgical system and its spray coagulation method, which enables large-area coagulation in endoscopic surgery. The system outputs a high-voltage sinusoidal pulse signal with a low current, electrolyzing air at the electrode output. The resulting heat energy acts on the tissue, promoting coagulation, thus achieving an effect similar to argon-like spray coagulation. Due to the low output power, energy is distributed without contact with the body surface, resulting in a low current at contact with the surface, thus achieving a large coagulation range and excellent coagulation effect.

[0028] In practical clinical applications, the spray coagulation method of this invention can quickly and effectively coagulate large-area bleeding, especially in tissues and organs with high vascular density, solving the problem of difficult-to-recover trauma caused by poor coagulation effect due to excessive contact area or excessive power. Attached Figure Description

[0029] Figure 1 This is a block diagram of the spray coagulation system of the high-frequency surgical device of the present invention.

[0030] Figure 2 This is a circuit diagram of the full-bridge drive module, full-bridge output module, power amplifier resonant module, and power amplifier transformer module.

[0031] Figure 3 This is the circuit diagram for the resonant output sampling module.

[0032] Figure 4 This is the system output voltage waveform. Detailed Implementation

[0033] To further understand the content of this invention, it will be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figure 1As shown, this invention provides a spray coagulation system based on a high-frequency surgical device, including a main power supply module for outputting a DC voltage signal to a full-bridge output module; a main control module controls a full-bridge drive waveform generation circuit to modulate the adjustable DC voltage signal into a pulse signal with a predetermined pulse width; the full-bridge output module converts the pulse signal with the predetermined pulse width into a square wave pulse signal and outputs it to a power amplifier resonant module; the power amplifier resonant module resonates and boosts the square wave pulse signal into a sine wave signal, which is then further boosted by a power amplifier transformer module before being output as a sine wave pulse signal to the load. Optionally, the voltage received by the main power supply module in this invention mainly comes from the AC voltage input from the mains power supply and is then converted into an adjustable DC high voltage signal output, while the voltage received by the auxiliary power supply module mainly comes from the AC voltage input from the mains power supply and is then converted into a stable DC low voltage output.

[0036] In this embodiment, the voltage pulse signal is 200VDC (volt-ampere) / 0.5A (ampere), which can be continuously output.

[0037] Optionally, this embodiment also includes a resonant output sampling module, with the output terminal of the power amplifier transformer module connected to the input terminal of the resonant output sampling module. The resonant output sampling module samples at least one of the output voltage signal, current signal, or power signal of the resonant power amplifier module and outputs it to the controller.

[0038] The main control module performs calculations and connects the results to the input terminal of the power module through output terminal 1 to adjust the power output; it connects to the input terminal of the full-bridge drive waveform generator circuit through output terminal 2 to control the full-bridge drive waveform generator circuit, which is used to modulate the DC voltage signal into a pulse signal with a predetermined pulse width.

[0039] like Figure 2The diagram shows the circuit diagrams of the full-bridge drive module, full-bridge output module, power amplifier resonant module, and power amplifier transformer module. The full-bridge drive module consists of four NAND gates U1-U4 and resistors R11, R12, and R13. Resistor R11 is connected to the controller output at one end and to the two inputs of NAND gate U1 at the other end. The two are connected in series and output to one input of NAND gate U3. Resistor R12 is connected to the controller output at one end and to the other input of NAND gate U3 and one input of NAND gate U4 at the other end. The signal PWM1 is obtained after processing by NAND gate U3. Resistor R13 is connected to the controller output at one end and to the two inputs of NAND gate U2 at the other end. The two are connected in series and output to the other input of NAND gate U4. The signal PWM2 is obtained after processing by NAND gate U4. PWM1 and PWM2 are output to the full-bridge output module to drive the four transistors in the full-bridge output module of the system resonant network. The four NAND gates U1, U2, U3, and U4 form a logic gate circuit; the first resistor R11 and the third resistor R13 are used to receive the complementary square wave sent by the controller, and the second resistor R12 is used to receive the PWM with a variable duty cycle sent by the controller; after passing through the logic gates, the complementary square waves with controllable duty cycles are output, namely PWM1 and PWM2.

[0040] The full-bridge output module circuit consists of four field-effect transistors (FETs) Q1-Q4. Q1 and Q2 are connected in series, with Q1's gate connected to the PWM1 signal output by the full-bridge driver module, Q1's drain connected to the power supply VCC, Q1's source connected to Q2's drain, Q2's gate connected to the PWM2 signal output by the full-bridge driver module, and Q2's source grounded. Q3 and Q4 are connected in series, with Q3's gate connected to the PWM2 signal output by the full-bridge driver module, Q3's drain connected to the power supply VCC, Q3's source connected to Q4's drain, Q4's gate connected to the PWM1 signal output by the full-bridge driver module, and Q4's source grounded. The sources of Q1 and Q3 are the two output ports of the full-bridge output module. These outputs serve as the inputs of the power amplifier resonant module, converting pulse signals with a predetermined pulse width into square wave pulse signals.

[0041] The power amplifier resonant module circuit consists of a resonant inductor L1 and DC blocking capacitors C5 and C6. The source output of Q3 is connected in series with the first DC blocking capacitor C5. The other end of C5 is connected to one end of transformer T1. The second DC blocking capacitor C6 is connected to both ends of the first winding of transformer T1. The second DC blocking capacitor C6 serves to filter out the DC component. The other end of the first winding of transformer T1 is connected to one end of the resonant inductor L1. The other end of the resonant inductor L1 is connected to the source of Q1. This module is used to receive the square wave pulse signal and output a high-voltage sine wave signal.

[0042] The power amplifier transformer module circuit consists of a transformer T1 and capacitors C7, C8, C9, C10, and C11. One end of the second winding of transformer T1 is connected in series with one end of the first matching capacitor C7, and the other end is connected in series with one end of the second matching capacitor C8. The other end of the first matching capacitor C7 is the first resonant power amplifier output terminal A, and the other end of the second matching capacitor C8 is the second resonant power amplifier output terminal B. In this embodiment, T1, C7, and C8 form a boost network, which boosts the resonant sinusoidal AC power of the power amplifier. The first matching capacitor C7 and the second matching capacitor C8 are used to adjust the output impedance characteristics. The power amplifier transformer module also includes at least one load capacitor. Optionally, in this embodiment, the three load capacitors C9, C10, and C11 form a dummy load for the output of the resonant power amplifier module. One end of load capacitor C9 is connected to the first resonant power amplifier output terminal A, and one end of load capacitor C11 is connected to the second resonant power amplifier output terminal B. Load capacitors C9, C10, and C11 are connected in series with each other. The resonant power amplifier outputs a modulated sine wave with a certain frequency and a Vp-p of 8000V at output terminals A and B. The dummy load, composed of load capacitors C9, C10, and C11 connected in series, is used for impedance matching at the output terminals of the resonant network.

[0043] like Figure 3 The circuit diagram shown is of the system resonant output sampling module, which consists of a signal conversion module, a precision rectification module, and a signal amplification module connected in series.

[0044] The signal conversion module consists of a transformer T2 and a resistor R6. The two ends of the resistor R6 are connected to the two ends of the secondary winding of the transformer T2. In this embodiment, T1 has a turns ratio of 50:1, and its function is to step down the current and voltage signals output by the resonant network through T1. The function of the resistor R6 is to convert the current signal into a voltage signal.

[0045] The full-wave rectifier module mainly consists of operational amplifiers U4A, U4B, D1, D2, R1, R2, R3, R5, R4, R7, and C1. D1 and D2 are connected in series and alternately conduct in the high-frequency zero-crossing sine wave to form negative feedback with operational amplifier U4B. Resistor R7 is connected in series with D1 to form a negative feedback loop for the negative voltage part of the sine wave. Resistors R4, R7, R1, and R2, together with operational amplifier U4A, form the signal amplification section. Resistors R1 and R2 are connected in parallel as matching resistors for signal amplification.

[0046] The signal amplification module amplifies the DC signal converted by the full-wave rectifier module and supplies it to the microcontroller for sampling; resistors R8 and R9 are connected in parallel to match the signal amplification coefficient; the third matching capacitor C12 is connected in parallel with resistor R9 for signal filtering.

[0047] Example 2

[0048] This invention also provides a spray coagulation output method based on a high-frequency surgical system, such as... Figure 1 The diagram shows a main power supply module, an auxiliary power supply module, a full-bridge output module, a power amplifier resonant module, a power amplifier transformer module, a full-bridge drive module, an output sampling module, a controller, and a load; the method includes the following steps:

[0049] S1, the auxiliary power module receives the AC power signal from the mains and outputs a low-voltage DC power signal to power each module;

[0050] S2, the main power module receives the AC signal from the mains power output and outputs a high-voltage adjustable DC signal to the full-bridge output module;

[0051] S3, the controller controls the full-bridge drive circuit to modulate the DC voltage signal into a pulse signal with a predetermined pulse width;

[0052] S4, the full-bridge output module converts a pulse signal with a predetermined pulse width into a square wave pulse signal;

[0053] S5, the resonant power amplifier module resonates and boosts the square wave pulse signal, converting the original square wave pulse signal into a sine wave pulse signal.

[0054] S6, the power amplifier transformer module outputs the sinusoidal pulse signal to the load ionized air after another boost;

[0055] S7, the output sampling module collects the current and voltage signals fed back by the power amplifier transformer module and calculates the power value;

[0056] Optionally, the above-mentioned technical solution 2 also includes an output sampling module to collect signals from the power amplifier transformer module. The controller receives the collected signals and adjusts the output power of the power supply module. The signals include at least one of current, voltage, or power.

[0057] The high-frequency surgical system invented using the above-mentioned technical solutions one and two, when the system foot pedal command is in the cutting and coagulation state, the controller starts configuring the power module to output 50V for the coagulation start voltage. After the output sampling module collects the output voltage and current, it calculates the sampled output power. If the power is lower than the set power, the power output voltage will be increased. In the coagulation mode, the impedance is high, and the power value calculated by sampling is low. The controller controls the main power module to increase the output voltage to 200V. In this mode, the voltage output by the main power supply is continuously stable at 200V. The controller controls the drive waveform generation circuit to modulate the DC signal output by the power module into a pulse signal with a predetermined pulse width.

[0058] Figure 4The output waveform is the electrical signal waveform at the electrode after two amplifications. The output Vp-p is an 8kV pulse sine waveform. The energy is 30W under the standard impedance of the electrosurgical unit. It has low damage and will not cause irreversible trauma due to excessive energy. The voltage is much higher than that of ordinary high-frequency electrosurgical units, and the coagulation effect is significantly better than that of ordinary high-frequency electrosurgical units.

[0059] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-frequency surgical system, characterized in that: Includes the main power supply module, used to output DC voltage signals; The main control module controls the full-bridge drive waveform generation circuit to modulate the DC voltage signal into a pulse signal with a predetermined pulse width; The full-bridge output module converts the pulse signal with a predetermined pulse width into a square wave pulse signal; The power amplifier resonant module is used to receive the square wave pulse signal and output a high-voltage sine wave signal; The power amplifier transformer module is used to further amplify the resonant high-voltage sinusoidal signal and output it through the load. The power amplifier resonant module also includes a resonant inductor, a first DC blocking capacitor, and a second DC blocking capacitor for isolating DC components. The resonant inductor, the first DC blocking capacitor, and the first winding of the transformer included in the power amplifier transformer module are connected in series, and the second DC blocking capacitor and the first winding of the transformer included in the power amplifier transformer module are connected in parallel. The power amplifier transformer module also includes a transformer, a first matching capacitor, and a second matching capacitor. One end of the first matching capacitor is connected in series with one end of the second winding of the transformer, and the other end of the first matching capacitor is the output terminal of the first resonant power amplifier. One end of the second matching capacitor is connected in series with the other end of the second winding of the transformer, and the other end of the second matching capacitor is the output terminal of the second resonant power amplifier. The power amplifier transformer module also includes at least one load capacitor, one end of which is connected to the output terminal of the first resonant power amplifier and the other end of which is connected to the output terminal of the second resonant power amplifier. The full-bridge drive waveform generation circuit includes: The first resistor has one end connected to the controller and the other end connected to one end of the first NAND gate. The other end of the first NAND gate is connected to one end of the third NAND gate. The other end of the third NAND gate is output to the full-bridge output module. The third resistor has one end connected to the controller and the other end connected to the second NAND gate. The other end of the second NAND gate is connected to one end of the fourth NAND gate, and the other end of the fourth NAND gate is output to the full-bridge output module. The third NAND gate and the fourth NAND gate are connected; The second resistor has one end connected to the controller and the other end connected to the third and fourth NAND gates.

2. The high-frequency surgical system according to claim 1, characterized in that, It also includes a resonant output sampling module, which collects the signal from the power amplifier transformer module. The resonant output sampling module outputs a signal to the controller, and the controller adjusts the power output according to the signal.

3. The high-frequency surgical system according to claim 2, characterized in that, The resonant output sampling module is composed of a signal conversion module, a precision rectification module, and a signal amplification module connected in series.

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