CN116196085A - High-frequency energy control system capable of self-adapting power output - Google Patents
High-frequency energy control system capable of self-adapting power output Download PDFInfo
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- CN116196085A CN116196085A CN202111441450.0A CN202111441450A CN116196085A CN 116196085 A CN116196085 A CN 116196085A CN 202111441450 A CN202111441450 A CN 202111441450A CN 116196085 A CN116196085 A CN 116196085A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00589—Coagulation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00601—Cutting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00607—Coagulation and cutting with the same instrument
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00642—Sensing and controlling the application of energy with feedback, i.e. closed loop control
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00702—Power or energy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00875—Resistance or impedance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a high-frequency energy control system with self-adaptive power output, and belongs to the technical field of electrosurgical medicine. According to the technical scheme provided by the invention, the system comprises an amplitude-adjustable switching power supply, a high-frequency power generator, an impedance detection module and a microcontroller. The invention designs a device which can detect the electrical impedance information of biological tissues in real time according to the difference of the electrical impedance of the biological tissues in operation and control the energy output of the high-frequency electrotome through detection feedback, thereby realizing the real-time monitoring of the tissue state, achieving a high-quality tissue closing and cutting effect and ensuring the safe and effective operation.
Description
Technical Field
The invention belongs to the technical field of electrosurgical medicine, and particularly relates to a high-frequency energy control system capable of self-adapting to power output.
Background
With the continuous development of medical instruments, more and more traditional surgical treatments are replaced by minimally invasive treatments, and in minimally invasive surgical operations, tissue cutting and closing are often performed. Electrosurgical instruments are high power high frequency energy generators that output energy at frequencies between 200kHz and 3.3MHz, with power from tens of watts to hundreds of watts. The development of modern biomedicine reveals the relationship between current and human body, and researches show that the current mainly generates thermal effect, stimulation effect and chemical effect when passing through the human body. When the frequency of the current is more than 200kHz, the stimulation effect is basically disappeared and only the thermal effect exists, and the electrosurgical instrument utilizes the thermal effect generated by the high-frequency energy to vaporize the moisture of the biological tissue and denature the protein so as to achieve the treatment effect.
The output energy and time of the high-frequency electrotome in the market are mostly judged by subjective experience of doctors on one hand; secondly, as different human bodies and different tissues in the human bodies have different resistance (conduction) rates under different physiological and pathological states; on the other hand, in the aspect of the design of a hardware design circuit, the electrosurgical instrument has different effects on high-frequency energy due to the difference of electrical properties of various components, so that the high-frequency energy is easily released too much to cause thermal damage or the tissue is not closed due to insufficient energy release. In order to solve these problems, the electrosurgical instrument is developed from a single cutting and coagulation function to an intelligent one, so as to aim at realizing real-time monitoring of tissue state, and a high-frequency energy control system for providing self-adaptive power output becomes necessary.
Disclosure of Invention
The invention provides a high-frequency energy control system capable of self-adapting to power output. The invention designs a device which can detect the electrical impedance information of biological tissues in real time according to the difference of the electrical impedance of the biological tissues in operation and control the energy output of the high-frequency electrotome through detection feedback, thereby realizing the real-time monitoring of the tissue state, achieving a high-quality tissue closing and cutting effect and ensuring the safe and effective operation.
In order to achieve the above object, according to the technical scheme provided by the invention, a high-frequency energy control system for self-adaptive power output comprises an amplitude-adjustable switching power supply, a high-frequency power generator, an impedance detection module and a microcontroller.
The amplitude-adjustable switching power supply adopts a plurality of module units to be connected in parallel for working, and comprises a rectifying and filtering circuit, a full-bridge adjustable isolation circuit and a feedback control circuit.
A) The rectification filter circuit is used for filtering out high-frequency signals of various electromagnetic interferences affecting the normal operation of the equipment in 220V mains supply;
b) The full-bridge adjustable isolation circuit isolates the power utilization output end from the power grid input end, safely and electrically isolates the power utilization output end from the ground, and simultaneously outputs the direct-current voltage with the maximum power of 700W and adjustable voltage of 0-140V;
c) The feedback control circuit controls the full-bridge adjustable isolation circuit by sampling the voltage signal of the output end, so that the full-bridge adjustable isolation circuit is adjusted according to the output requirement.
The high-frequency power generator comprises a full-bridge power amplifier circuit and a power amplifier topology circuit.
D) The Quan Qiaogong discharging circuit converts the direct-current voltage into the required alternating-current square-wave voltage with specific frequency, and the output power is adjustable by 1-350W, so that the amplification of the high-frequency signal is realized;
e) The power amplifier topology circuit converts alternating square wave voltage into alternating sine wave voltage after series resonance, and the alternating sine wave voltage is isolated and impedance matched through a circuit which is in contact with a patient through an isolation transformer.
The impedance detection module monitors the voltage parameter acting on the biological tissue in real time and provides the voltage parameter as feedback quantity to the microcontroller.
The microcontroller adopts feedback control, adjusts the output amplitude of the amplitude-adjustable switching power supply by a small signal of 0-5V according to the feedback quantity of the impedance detection module, so as to monitor the impedance of biological tissues in real time and determine the energy output.
Compared with the prior art, the high-frequency energy control system with the self-adaptive power output has the following beneficial effects:
1. according to the invention, the biological impedance information can be detected in real time according to the different self impedance of different patients, and matched high-frequency energy is output through feedback control, so that the cutting and closing of biological tissues are effectively completed, the use efficiency of the high-frequency electrotome is improved, and the medical safety is ensured.
2. The invention adopts the amplitude adjustable switching power supply with high response speed and good voltage regulation effect, adopts the full-bridge switching power amplification circuit and the matched power amplification topological circuit to amplify the high-frequency signal with high efficiency, further improves the output power and the output energy efficiency, ensures that the design of the whole system has quick response capability and can finish the time required by one-time vascular closure by 2.0-3.0 s.
Drawings
Fig. 1 is a block diagram of a control system according to the present invention.
Fig. 2 is a block diagram of the amplitude-adjustable switching power supply of the present invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
A high frequency energy control system for adaptive power output is shown in FIG. 1, and comprises an amplitude adjustable switching power supply, a high frequency power generator, an impedance detection module and a microcontroller.
The amplitude-adjustable switch power supply can realize amplitude digital adjustment and has the limiting function on output power, current and voltage so as to protect the safety of a system and a user, adopts a plurality of module units to be connected in parallel for working, and comprises a rectifying and filtering circuit, a full-bridge adjustable isolation circuit and a feedback control circuit as shown in figure 2.
A) The rectification filter circuit is used for filtering out high-frequency signals of various electromagnetic interferences affecting the normal operation of the equipment in 220V mains supply;
b) The full-bridge adjustable isolation circuit isolates the power utilization output end from the power grid input end, safely and electrically isolates the power utilization output end from the ground, and simultaneously outputs the direct-current voltage with the maximum power of 700W and adjustable voltage of 0-140V;
c) The feedback control circuit controls the full-bridge adjustable isolation circuit by sampling the voltage signal of the output end, so that the full-bridge adjustable isolation circuit is adjusted according to the output requirement.
The amplitude-adjustable switching power supply realizes power adjustment by adjusting the voltage according to the specificity of the human body part load characteristic, and determines main circuit design parameters according to the design target and the topological structure of the switching power supply according to the characteristic, wherein the design is different from a general switching power supply which realizes power adjustment design scheme by changing current.
The high-frequency power generator comprises a full-bridge power amplifier circuit and a power amplifier topology circuit;
d) The Quan Qiaogong discharging circuit converts the direct-current voltage into the required alternating-current square-wave voltage with specific frequency, and the output power is adjustable by 1-350W, so that the amplification of the high-frequency signal is realized;
e) The power amplifier topology circuit converts alternating square wave voltage into alternating sine wave voltage after series resonance, and the alternating sine wave voltage is isolated and impedance matched through a circuit which is in contact with a patient through an isolation transformer.
The output characteristic of the high-frequency power generator is designed to be a sine wave of alternating current 512K, and the effect of the high-frequency sine wave signal output on tissue cutting and coagulation is superior to that of the high-frequency square wave signal.
The impedance detection module monitors the voltage parameter acting on the biological tissue in real time and provides the voltage parameter as feedback quantity to the microcontroller.
The microcontroller adopts feedback control, adjusts the output amplitude of the amplitude-adjustable switching power supply by a small signal of 0-5V according to the feedback quantity of the impedance detection module, so as to monitor the impedance of biological tissues in real time and determine the energy output.
Experimental research shows that the biological impedance and the biological tissue state have close relation, so that the voltage and current parameters acting on the biological tissue can be selected as feedback quantity, and the controller can monitor the biological tissue state and determine the energy output in real time according to the feedback quantity. The impedance detection module and the microcontroller cooperate to complete real-time judgment and self-adaptive power control of the biological impedance.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention thereto. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The protection scope of the patent of the invention shall be subject to the appended claims.
Claims (5)
1. The utility model provides a high frequency energy control system of self-adaptation power output, this system includes amplitude adjustable switching power supply, high frequency power generator, impedance detection module and microcontroller, its characterized in that: the high-frequency power generator converts the direct-current voltage into alternating-current square-wave voltage with specific frequency, resonates the alternating-current square-wave voltage into alternating-current sine-wave voltage to act on a patient, and the impedance detection module monitors voltage parameters acting on biological tissues of the patient as feedback quantity and provides the feedback quantity for the microcontroller to control the output voltage amplitude of the amplitude-adjustable switching power supply and the output voltage waveform of the high-frequency power generator.
2. The high-frequency energy control system according to claim 1, characterized in that: the amplitude-adjustable switching power supply adopts a plurality of module units to be connected in parallel for working and comprises a rectifying and filtering circuit, a full-bridge adjustable isolation circuit and a feedback control circuit;
a) The rectification filter circuit is used for filtering out high-frequency signals of various electromagnetic interferences affecting the normal operation of the equipment in 220V mains supply;
b) The full-bridge adjustable isolation circuit isolates the power utilization output end from the power grid input end, safely and electrically isolates the power utilization output end from the ground, and simultaneously outputs the direct-current voltage with the maximum power of 700W and adjustable voltage of 0-140V;
c) The feedback control circuit controls the full-bridge adjustable isolation circuit by sampling the voltage signal of the output end, so that the full-bridge adjustable isolation circuit is adjusted according to the output requirement.
3. The high-frequency energy control system according to claim 1, characterized in that: the high-frequency power generator comprises a full-bridge power amplifier circuit and a power amplifier topology circuit;
d) The Quan Qiaogong discharging circuit converts the direct-current voltage into the required alternating-current square-wave voltage with specific frequency, outputs 1-350W adjustable power and realizes the amplification of high-frequency signals;
e) The power amplifier topology circuit converts alternating square wave voltage into alternating sine wave voltage after series resonance, and the alternating sine wave voltage is isolated and impedance matched through a circuit which is in contact with a patient through an isolation transformer.
4. The high-frequency energy control system according to claim 1, characterized in that: the impedance detection module monitors the voltage parameter acting on the biological tissue in real time and provides the voltage parameter as feedback quantity to the microcontroller.
5. The high-frequency energy control system according to claim 1, characterized in that: the microcontroller adopts feedback control, adjusts the output amplitude of the amplitude-adjustable switching power supply by a small signal of 0-5V according to the feedback quantity of the impedance detection module, so as to monitor the impedance of biological tissues in real time and determine the energy output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441450.0A CN116196085A (en) | 2021-11-30 | 2021-11-30 | High-frequency energy control system capable of self-adapting power output |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111441450.0A CN116196085A (en) | 2021-11-30 | 2021-11-30 | High-frequency energy control system capable of self-adapting power output |
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| CN116196085A true CN116196085A (en) | 2023-06-02 |
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| CN202111441450.0A Pending CN116196085A (en) | 2021-11-30 | 2021-11-30 | High-frequency energy control system capable of self-adapting power output |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117379172A (en) * | 2023-12-12 | 2024-01-12 | 山东百多安医疗器械股份有限公司 | Intelligent surgical electrotome device |
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2021
- 2021-11-30 CN CN202111441450.0A patent/CN116196085A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117379172A (en) * | 2023-12-12 | 2024-01-12 | 山东百多安医疗器械股份有限公司 | Intelligent surgical electrotome device |
| CN117379172B (en) * | 2023-12-12 | 2024-02-13 | 山东百多安医疗器械股份有限公司 | Intelligent surgical electrotome device |
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