CN114451987A

CN114451987A - Intravenous cavity radio frequency closing system

Info

Publication number: CN114451987A
Application number: CN202210098121.9A
Authority: CN
Inventors: 何成东; 帅康; 于奎
Original assignee: Jiangsu Bonss Medical Technology Co ltd
Current assignee: Jiangsu Bonss Medical Technology Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-05-10
Anticipated expiration: 2042-01-27
Also published as: CN114451987B

Abstract

The invention discloses a venous intracavity radio frequency closing system which comprises an EMC module connected with commercial power, wherein the EMC module is electrically connected with an AC/DC module, the AC/DC module converts the commercial power into two paths of low-voltage direct current, one path of low-voltage direct current is connected with an auxiliary power supply processing unit, and the other path of low-voltage direct current is connected with an output module; the output module comprises a DC/DC module which is respectively and electrically connected with the DC/DC driving unit, the DC current sampling unit and the DC/RF module; the DC/DC driving unit and the DC current sampling unit are electrically connected with the main control unit. The invention can accurately control the radio frequency energy output by the system, constantly control the temperature to the preset temperature, and control the error to be 0-3 ℃; the constant temperature control in the range of 90-135 ℃ can be realized, the structure of the electrode catheter cable is simplified, and the temperature, the output radio frequency power and the remaining time of a treatment cycle of the catheter temperature sensor can be displayed in real time; and can adapt to various types of catheters, is suitable for varicose vein treatment of different patients, and accurately controls energy transmission.

Description

Intravenous cavity radio frequency closing system

Technical Field

The invention belongs to the technical field of radio frequency closing systems, and particularly relates to a venous intracavity radio frequency closing system.

Background

Varicose veins in the lower extremities are one of the most common peripheral vascular diseases, affecting nearly 1/3 worldwide. The traditional superficial vein high ligation denudation is a classic operation type for treating varicose veins of lower limbs, the technology is mature, the operation is simple, but the defects of large operation wound, more complications, slow recovery, long hospitalization time, high recurrence rate and the like exist.

In recent years, the traditional operation mode is gradually replaced by minimally invasive surgery, and the intracavity thermal ablation closing operation has been carried out for more than 20 years so far, and the principle is that different physical media are utilized to release heat energy in the vein cavity, so that the vein cavity is heated and contracted and rapidly becomes fibrosis to form thrombus, and then a diseased blood vessel is closed. Common intraluminal thermal ablation closure procedures include intraluminal laser closure, intraluminal steam closure, intraluminal microwave closure, and the like. Although the curative effect of the endoluminal thermal ablation closure is definite, a large amount of evidence-based medicine is accumulated at present, the endoluminal thermal ablation closure is recommended as a first-line treatment scheme by a plurality of guidelines, and the open surgery is mostly replaced in western countries, certain disadvantages still exist in the endoluminal thermal ablation closure, such as: the great saphenous vein after the treatment of the intracavity laser closure surgery is not completely closed, the condition of the postoperative recanalization is more, the blood vessel residual blood is too much due to the excessively high withdrawal speed or the excessively light compression of the laser optical fiber in the surgery, the great saphenous vein closure effect is influenced, and the postoperative recurrence is easy. Meanwhile, the laser occlusion in the cavity has various adverse reactions, such as laser subcutaneous ecchymosis, skin numbness after hidden nerve injury, skin burning sensation and the like. The clinical application of the intracavity steam closure and the intracavity microwave closure is relatively less at present, and a small amount of research shows that the vein closure rate after the intracavity microwave closure for three years is 79.8 percent, the numbness rate of the affected limbs is as high as 32.1 percent, and the curative effects of the two closures are still to be verified due to less evidence of evidence-based medical science.

The venous intracavity radio frequency closure is used as a first-line treatment method for varicose veins of lower limbs, mainly plays a role by thermally inducing vasospasm and collagen contraction, but how to realize accurate control of energy transmission provides a safer and more reliable system for patients, and is a problem to be solved at present.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a venous cavity radio frequency closing system, which solves the problem that the transmission of the existing venous cavity radio frequency control energy is not accurate.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:

on one hand, the venous intracavity radio frequency closing system comprises an EMC module connected with mains supply, the EMC module is electrically connected with an AC/DC module, the AC/DC module converts the mains supply into two low-voltage direct currents, one path of the low-voltage direct currents is connected with an auxiliary power supply processing unit, and the other path of the low-voltage direct currents is connected with an output module.

The invention adopts the topology and the power control network structure to be simple and clear and save space; the radio frequency energy output by the system can be accurately controlled, the temperature is constantly controlled to be the preset temperature, and the error is 0-3 ℃; the constant temperature control within the range of 90-135 ℃ can be realized, the cable structure of the electrode catheter is simplified, an 8-core design is adopted to match the manual start and stop of the electrode catheter, and the operation is simple; the temperature of the catheter temperature sensor, the output radio frequency power and the remaining time of a treatment cycle can be displayed in real time; and can adapt to various types of catheters, is suitable for varicose vein treatment of different patients, and accurately controls energy transmission.

Further, the output module comprises a DC/DC module which is respectively electrically connected with the DC/DC driving unit, the DC current sampling unit and the DC/RF module; the DC/DC driving unit and the DC current sampling unit are electrically connected with the main control unit, the DC/RF module is electrically connected with the PWM driving unit and the main control unit in sequence, and the DC/RF module is also electrically connected with the output correction module.

Further, the DC/DC driving unit comprises a DC voltage sampling unit for sampling a target DC voltage output by the DC/DC module, a DC voltage sampling and conditioning module for filtering, amplitude limiting and conditioning, a first PWM (pulse-width modulation) adjusting module for generating a PWM signal and a first PWM driving module for amplifying the PWM signal of the first PWM adjusting module; the DC voltage sampling unit, the DC voltage sampling conditioning module, the first PWM adjusting module and the first PWM driving module are sequentially connected, the DC voltage sampling conditioning module and the first PWM adjusting module are electrically connected with the main control unit, and the first PWM driving module is electrically connected with the DC/DC module

Furthermore, the PWM driving unit comprises a second PWM adjusting module for filtering and limiting current, a second PWM driving module for amplifying the output signal and a PWM driving isolation module for amplifying the output signal and displaying isolation, the second PWM adjusting module, the second PWM driving module and the PWM driving isolation module are sequentially connected, and the PWM driving isolation module is electrically connected with the DC/RF module.

Furthermore, the output correction module is respectively and electrically connected with the radio frequency current protection unit, the radio frequency current sampling unit and the radio frequency voltage sampling unit, and the radio frequency current protection unit, the radio frequency current sampling unit and the radio frequency voltage sampling unit are all electrically connected with the main control unit; the output correction module is also electrically connected with the temperature sampling conditioning unit, the catheter communication unit and the electrode catheter; the main control unit is electrically connected with the left functional unit and the right functional unit respectively.

Furthermore, the left function unit comprises a temperature sampling and conditioning unit, an audio unit and a fan unit, and the temperature sampling and conditioning unit, the audio unit and the fan unit are all electrically connected with the main control unit; an LT1025 chip for temperature compensation and an LT1053 chip for building a differential signal and conditioning a circuit are arranged in the temperature sampling conditioning unit; the audio unit is an MCP4541 digital potentiometer.

Furthermore, the right function unit comprises a display unit, a pedal unit and a conduit communication unit, and the display unit, the pedal unit and the conduit communication unit are all electrically connected with the main control unit; an STM32L011D4XX communication chip is arranged in the catheter communication unit.

Furthermore, the auxiliary power supply processing unit comprises a first DC filtering module for filtering high-frequency current, an input voltage protection module for detecting direct-current voltage, a DC/DC isolation module for isolating a power supply network and an output circuit, and a second DC filtering module for filtering high-frequency noise of the DC/DC isolation module; the first DC filtering module, the input voltage protection module, the DC/DC isolation module and the second DC filtering module are connected in sequence.

The invention discloses a venous intracavity radio frequency closing system, which has the beneficial effects that:

the topology and the power control network adopted by the invention have simple and clear structure and save space; the radio frequency energy output by the system can be accurately controlled, the temperature of the catheter temperature sensor is kept constant at the target temperature, and the error can be controlled within 3 ℃; the electrode catheter cable has the advantages that the constant temperature control within the range of 90-135 ℃ can be realized (the resolution is 5 ℃), the structure of the electrode catheter cable is simplified, the 8-core design is adopted, the functions are complete, the manual start and stop of the electrode catheter are matched, and the operation is simple; the system has complete functions, various parameters of the multiple systems are monitored on the basis of realizing the target function, the temperature of the catheter temperature sensor is displayed in real time, the output radio frequency power is accurately displayed, and the residual time of the treatment period is displayed in real time; and is adapted to various types of catheters for varicose vein treatment of different patients.

Drawings

Fig. 1 is a schematic structural diagram of an intravenous radio frequency closure system.

Fig. 2 is a schematic diagram of an auxiliary power processing unit of the intravenous radio frequency closure system.

Fig. 3 is a schematic diagram of a DC/DC drive unit of an intravenous lumen radio frequency closure system.

Fig. 4 is a schematic diagram of a DC/RF module of a venous intraluminal radio frequency closure system.

Wherein, 1, a main control unit; 2. an EMC module; 3. an AC/DC module; 4. an auxiliary power supply processing unit; 4-1, a first DC filtering module; 4-2, an input voltage protection module; 4-3, a DC/DC isolation module; 4-4, a second DC filtering module; 5. a DC/DC module; 6. a DC/DC driving unit; 6-1, a DC voltage sampling module; 6-2, a DC voltage sampling conditioning module; 6-3, a first PWM adjusting module; 6-4, a first PWM driving module; 7. a DC current sampling unit; 8. a DC/RF module; 9. a PWM driving unit; 9-1, a second PWM adjusting module; 9-2, a second PWM driving module; 9-3, driving an isolation module by PWM; 10. an output correction module; 11. a radio frequency current protection unit; 12. a radio frequency current sampling unit; 13. a radio frequency voltage sampling unit; 14. a temperature sampling and conditioning unit; 15. an audio unit; 16. a fan unit; 17. a display unit; 18. a pedal unit; 19. a catheter communication unit; 20. an electrode catheter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

According to an embodiment one of the present application, referring to fig. 1, the venous intracavity radio frequency closing system of the present embodiment includes:

the electric power supply system comprises an EMC module 2 connected with the electric power supply, the EMC module 2 is electrically connected with an AC/DC module 3, the AC/DC module 3 converts the electric power supply into two paths of low-voltage direct currents, one path of low-voltage direct currents is connected with an auxiliary power supply processing unit 4, and the other path of low-voltage direct currents is connected with an output module.

The EMC module 2 of the invention carries out radio frequency filtering on the accessed commercial power (220V-/110V-), and the commercial power is converted into low-voltage direct current through the AC/DC module 3, the low-voltage direct current is divided into two paths, one path is used for supplying power to the auxiliary power supply, and the other path is used for outputting main power.

According to the second embodiment of the present application, the second embodiment is a further technical solution of the first embodiment, which specifically includes: .

The output module comprises a DC/DC module 5, and the DC/DC module 5 is electrically connected with a DC/DC driving unit 6, a DC current sampling unit 7 and a DC/RF module 8 respectively; the DC/DC driving unit 6 and the DC current sampling unit 7 are electrically connected with the main control unit 1, the DC/RF module 8 is electrically connected with the PWM driving unit 9 and the main control unit 1 in sequence, and the DC/RF module 8 is also electrically connected with the output correction module 10; in order to prevent the power transformer of the DC/RF module 8 from generating a magnetic bias phenomenon to cause a radio frequency waveform malformation, the output radio frequency energy needs to be subjected to a radio frequency waveform correction by the output correction module 10.

As a further scheme of the DC/DC driving unit 6 of this embodiment, referring to fig. 3, the DC/DC driving unit 6 includes a DC voltage sampling unit 6-1 for sampling a target DC voltage output by the DC/DC module 5, a DC voltage sampling conditioning module 6-2 for filtering, amplitude-limiting and conditioning, a first PWM adjusting module 6-3 for generating a PWM signal, and a first PWM driving module 6-4 for amplifying the PWM signal of the first PWM adjusting module 6-3; the DC voltage sampling unit 6-1, the DC voltage sampling conditioning module 6-2, the first PWM adjusting module 6-3 and the first PWM driving module 6-4 are sequentially connected, the DC voltage sampling conditioning module 6-2 and the first PWM adjusting module 6-3 are both electrically connected with the main control unit 1, and the first PWM driving module 6-4 is electrically connected with the DC/DC module 5.

The low-voltage direct current is used in the main power output process: when low-voltage direct current is output by the DC/DC module 5, in order to ensure constant output voltage, the DC/DC driving unit 6 adopts a three-type voltage loop design, specifically, in the DC/DC driving unit 6, the DC voltage sampling module 6-1 samples target direct current voltage output by the DC/DC module 5, the DC voltage sampling and conditioning module 6-2 carries out filtering amplitude limiting conditioning on the sampled target direct current voltage signal and feeds back the signal to the main control unit 1, the main control unit 1 sets the target direct current voltage to a required voltage value by adjusting parameters of the first PWM adjusting module 6-3, meanwhile, the conditioned target direct current voltage signal generates a PWM signal through the first PWM adjusting module 6-3 and carries out a voltage loop according to the sampled voltage value, and finally, the PWM signal is amplified by the first PWM driving module 6-4, a semiconductor switching device for driving the DC/DC module 5; meanwhile, when the low-voltage direct current is output through the DC/DC module 5, the DC current sampling unit 7 samples the current of the target direct current voltage port, performs filtering and amplitude limiting processing on the sampled current signal, and feeds the current signal back to the main control unit 1; so far, the main control unit 1 receives the conditioned current signal and voltage signal to realize the protection processing of start-stop management and parameter monitoring of the DC/DC module 5; the DC/DC module 5 may use an existing UC3842 chip to drive a flyback topology or a flyback topology, or use a UC3879 chip/UCC 3895 chip to drive a full-bridge topology.

As a further scheme of the PWM driving unit 9 in this embodiment, referring to fig. 4, the PWM driving unit 9 includes a second PWM adjusting module 9-1 for limiting filtering current, a second PWM driving module 9-2 for amplifying an output signal, and a PWM driving isolating module 9-3 for amplifying the output signal and displaying isolation, the second PWM adjusting module 9-1, the second PWM driving module 9-2, and the PWM driving isolating module 9-3 are sequentially connected, and the PWM driving isolating module 9-3 is electrically connected to the DC/RF module 8.

When the constant voltage is output to the DC/RF module 8, the main control unit 1 controls the PWM driving unit 9, so as to implement start-stop management and parameter setting (frequency and duty ratio) of the DC/RF module 8, specifically: the second PWM adjusting module 9-1 performs filtering current-limiting processing on the parameters sent by the main control unit 1, the processed output signals are subjected to primary amplification through the second PWM driving module 9-2, the output amplified signals are subjected to secondary amplification and display isolation through the PWM driving isolation module 9-3, and finally transmitted to the DC/RF module 8, so that the radio frequency output control of the main control unit 1 on the DC/RF module 8 is realized.

The output correction module 10 is respectively and electrically connected with a radio frequency current protection unit 11, a radio frequency current sampling unit 12 and a radio frequency voltage sampling unit 13, and the radio frequency current protection unit 11, the radio frequency current sampling unit 12 and the radio frequency voltage sampling unit 13 are all electrically connected with a main control unit 1; the output correction module 10 is also electrically connected with the temperature sampling and conditioning unit 14, the catheter communication unit 19 and the electrode catheter 20; the main control unit 1 is electrically connected with the left functional unit and the right functional unit respectively.

In this embodiment, in order to prevent the corrected rf output current from being abnormal, the system is provided with an rf current protection unit 11, which is used to detect the peak value of the rf output current, perform filtering processing, and transmit the peak value to the main control unit 1, and if abnormal, close the output; meanwhile, the corrected radio frequency output respectively carries out precise radio frequency current and voltage sampling through the radio frequency current sampling unit 12 and the radio frequency voltage sampling unit 13, and is transmitted to the main control unit 1, so that the main control unit 1 can really collect radio frequency current signals and voltage signals, and the impedance of the instantaneous catheter heating element can be accurately given.

The radio frequency output of the embodiment is finally transmitted to the electrode catheter 20 to realize output, the temperature sampling and conditioning unit 14 is used for receiving and processing the temperature of the temperature sensor on the electrode catheter and transmitting the temperature to the main control unit 1, and the main control unit 1 realizes that the temperature of the electrode catheter is constant at a target value through regulating and controlling the power output of the system, so as to perform the closed operation of the varicose vein.

Wherein, the temperature sensor on the electrode conduit 20 can adopt a thermocouple; in the temperature sampling conditioning unit 14, an LT1025 chip can be adopted for temperature compensation, so that the thermocouple reaches the use standard and the consistency is increased; and an LT1053 chip is used for building a differential signal conditioning circuit to filter noise of radio frequency energy during working, and finally the temperature on the electrode conduit 20 is accurately fed back to the control unit 1.

Electrode conduit 20 has the work pilot lamp, has manual start-stop function, and electrode conduit 20 contains control chip, realizes the communication through pipe communication unit 19 and system, for reducing all sinle silk quantity of electrode conduit cable, reduces shared space simultaneously, and electrode conduit adopts RS485 communication protocol, realizes that electrode conduit information uploads, for system upload start-stop information, and electrode conduit cable adopts 8 cores: RS485-A, RS485-B, VCC, GND, RF1, RF2 and two temperature sensor cables; the control chip of the electrode catheter can adopt an STM32L011D4XX chip as a communication chip.

According to the third embodiment of the present application, which is a further technical solution of the second embodiment, the method specifically includes: .

The left functional unit comprises a temperature sampling and conditioning unit 14, an audio unit 15 and a fan unit 16, and the temperature sampling and conditioning unit 14, the audio unit 15 and the fan unit 16 are all electrically connected with the main control unit 1; an LT1025 chip for temperature compensation and an LT1053 chip for building a differential signal and conditioning a circuit are arranged in the temperature sampling conditioning unit 14; the audio unit 15 is an MCP4541 digital potentiometer.

The audio unit 15 is electrically connected with the main control unit 1, the digital potentiometer in the audio unit 15 adopts MCP4541, the audio gain can be accurately controlled, the space is reduced, and the fault is subjected to alarm prompt through a loudspeaker; the fan unit 16 is electrically connected with the main control unit 1 and can perform air cooling treatment on the system.

The right function unit comprises a display unit 17, a pedal unit 18 and a conduit communication unit 19, and the display unit 17, the pedal unit 18 and the conduit communication unit 19 are all electrically connected with the main control unit 1; an STM32L011D4XX communication chip is arranged in the catheter communication unit 19.

The display unit 17 is electrically connected with the main control unit 1, displays the current electrode catheter type, the real-time temperature of the electrode catheter, the remaining time of a treatment cycle and power related parameters for a human-computer interaction processing interface; the pedal unit 18 is electrically connected with the main control unit 1 and used for switching the working state of the system.

According to the fourth embodiment of the present application, the fourth embodiment is a further technical solution of the first embodiment, and specifically includes: .

Referring to fig. 2, the auxiliary power supply processing unit 4 includes a first DC filter module 4-1 for filtering high frequency current, an input voltage protection module 4-2 for detecting direct current voltage, a DC/DC isolation module 4-3 for isolating a power supply network and an output circuit, and a second DC filter module 4-4 for filtering high frequency noise of the DC/DC isolation module 4-3; the first DC filtering module 4-1, the input voltage protection module 4-2, the DC/DC isolation module 4-3 and the second DC filtering module 4-4 are connected in sequence.

As a further solution of the auxiliary power supply processing unit 4 of the embodiment, a low voltage dc is used in the auxiliary power supply process: the low-voltage direct current firstly passes through a first DC filtering module 4-1 in an auxiliary power supply processing unit 4 to filter high-frequency components in a switching power supply, then passes through an input voltage protection module 4-2 to detect whether the direct current voltage is correct, then passes through a DC/DC isolation module 4-3 to isolate a power supply network and a main power output circuit of the system, then passes through a second DC filtering module 4-4 to filter high-frequency noise in the DC/DC isolation module 4-3, and finally is used for supplying power to a control circuit and the like of the system.

The use method of the system comprises the following steps:

1. and switching on the power supply, pressing down a power switch, carrying out self-checking on the system, and if the self-checking is passed, enabling the display screen to enter the main page. Otherwise, the display screen prompts error information and gives an alarm sound.

2. The catheter is connected to a catheter socket of the system, the system inquires and confirms the catheter information (inquires whether the catheter is the catheter matched with the system and confirms the model specification of the catheter), and if the connected catheter is a valid catheter, a display screen displays a catheter icon and related information.

3. If the foot switch is needed, the foot switch is connected, the system inquires the foot information and displays the corresponding icon on the display screen. When the pedal is pressed down, or a start-stop switch of the catheter is pressed down, the working state of the system is switched. And if the current state of the system is standby, the system carries out the working state of radio frequency output.

4. After the system enters a working state, the system firstly acquires the real temperature value of the current electrode catheter temperature sensor; comparing the currently obtained real temperature value with the target temperature value of the catheter, and controlling the DC/DC module 5 and the DC/RF module 8 so as to control the size of the radio frequency output energy; finally, the system controls the size of the output radio frequency energy to realize that the temperature of the catheter is constant at the target temperature of the electrode catheter.

While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. An intravenous intraluminal radio frequency closure system, comprising: including EMC module (2) of inserting the commercial power, EMC module (2) are connected with AC/DC module (3) electricity, AC/DC module (3) convert the commercial power into two way low pressure direct currents, link to each other with auxiliary power supply processing unit (4) all the way, and another way links to each other with output module.

2. The intravenous radio frequency closure system of claim 1, wherein: the output module comprises a DC/DC module (5), and the DC/DC module (5) is electrically connected with a DC/DC driving unit (6), a DC current sampling unit (7) and a DC/RF module (8) respectively; the DC/DC driving unit (6) and the DC current sampling unit (7) are electrically connected with the main control unit (1), the DC/RF module (8) is electrically connected with the PWM driving unit (9) and the main control unit (1) in sequence, and the DC/RF module (8) is also electrically connected with the output correction module (10).

3. The intravenous radio frequency closure system of claim 2, wherein: the DC/DC driving unit (6) comprises a DC voltage sampling unit (6-1) for sampling a target direct-current voltage output by the DC/DC module (5), a DC voltage sampling conditioning module (6-2) for filtering, amplitude limiting and conditioning, a first PWM adjusting module (6-3) for generating a PWM signal and a first PWM driving module (6-4) for amplifying the PWM signal of the first PWM adjusting module (6-3); the DC voltage sampling unit (6-1), the DC voltage sampling conditioning module (6-2), the first PWM adjusting module (6-3) and the first PWM driving module (6-4) are sequentially connected, the DC voltage sampling conditioning module (6-2) and the first PWM adjusting module (6-3) are electrically connected with the main control unit (1), and the first PWM driving module (6-4) is electrically connected with the DC/DC module (5).

4. The intravenous radio frequency closure system of claim 2, wherein: the PWM driving unit (9) comprises a second PWM adjusting module (9-1) for filtering and limiting current, a second PWM driving module (9-2) for amplifying output signals and a PWM driving isolating module (9-3) for amplifying the output signals and displaying isolation, the second PWM adjusting module (9-1), the second PWM driving module (9-2) and the PWM driving isolating module (9-3) are sequentially connected, and the PWM driving isolating module (9-3) is electrically connected with the DC/RF module (8).

5. The intravenous radio frequency closure system of claim 2, wherein: the output correction module (10) is respectively and electrically connected with the radio frequency current protection unit (11), the radio frequency current sampling unit (12) and the radio frequency voltage sampling unit (13), and the radio frequency current protection unit (11), the radio frequency current sampling unit (12) and the radio frequency voltage sampling unit (13) are all electrically connected with the main control unit (1); the output correction module (10) is also electrically connected with the temperature sampling and conditioning unit (14), the catheter communication unit (19) and the electrode catheter (20); the main control unit (1) is electrically connected with the left functional unit and the right functional unit respectively.

6. The intravenous radio frequency closure system of claim 5, wherein: the left function unit comprises a temperature sampling and conditioning unit (14), an audio unit (15) and a fan unit (16), and the temperature sampling and conditioning unit (14), the audio unit (15) and the fan unit (16) are all electrically connected with the main control unit (1); an LT1025 chip for temperature compensation and an LT1053 chip for building a differential signal and conditioning a circuit are arranged in the temperature sampling conditioning unit (14); the audio unit (15) is an MCP4541 digital potentiometer.

7. The intravenous radio frequency closure system of claim 5, wherein: the right function unit comprises a display unit (17), a pedal unit (18) and a conduit communication unit (19), and the display unit (17), the pedal unit (18) and the conduit communication unit (19) are all electrically connected with the main control unit (1); an STM32L011D4XX communication chip is arranged in the catheter communication unit (19).

8. The intravenous radio frequency closure system of claim 1, wherein: the auxiliary power supply processing unit (4) comprises a first DC filtering module (4-1) for filtering high-frequency current, an input voltage protection module (4-2) for detecting direct-current voltage, a DC/DC isolation module (4-3) for isolating a power supply network and an output circuit, and a second DC filtering module (4-4) for filtering high-frequency noise of the DC/DC isolation module (4-3); the first DC filtering module (4-1), the input voltage protection module (4-2), the DC/DC isolation module (4-3) and the second DC filtering module (4-4) are connected in sequence.