CN114451987B - Intravenous cavity radio frequency closing system - Google Patents
Intravenous cavity radio frequency closing system Download PDFInfo
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- CN114451987B CN114451987B CN202210098121.9A CN202210098121A CN114451987B CN 114451987 B CN114451987 B CN 114451987B CN 202210098121 A CN202210098121 A CN 202210098121A CN 114451987 B CN114451987 B CN 114451987B
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- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
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- 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
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00404—Blood vessels other than those in or around the heart
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- 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
- A61B2018/00577—Ablation
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- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00702—Power or energy
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00714—Temperature
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- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The application discloses a venous intracavity radio frequency closing system which comprises an EMC module connected with a mains supply, wherein the EMC module is electrically connected with an AC/DC module, the AC/DC module converts the mains supply into two paths of low-voltage direct current, one path of the low-voltage direct current is connected with an auxiliary power supply processing unit, and the other path of the 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 application 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 between 0 and 3 ℃; the constant temperature control within the range of 90-135 ℃ can be realized, the structure of the electrode catheter cable is simplified, and the temperature of the catheter temperature sensor, the output radio frequency power and the residual time of the treatment period can be displayed in real time; and can adapt to various types of catheters, and is used for treating varicose veins of different patients, and accurately controlling energy transmission.
Description
Technical Field
The application belongs to the technical field of radio frequency closure systems, and particularly relates to a venous intracavity radio frequency closure system.
Background
Varicose veins of the lower extremities are one of the most common peripheral vascular diseases affecting nearly 1/3 of the population worldwide. The traditional superficial vein high ligation and stripping operation is a classical operation type for treating varicose veins of lower limbs, is mature in technology and simple to operate, but has the defects of large operation wound, more complications, slow recovery, long hospitalization time, high recurrence rate and the like.
In recent years, the traditional operation mode is gradually replaced by minimally invasive operation, and the intra-cavity thermal ablation closing operation has been used for more than 20 years, and the principle is that different physical media are utilized to release heat energy in a vein cavity, so that the cavity is heated and contracted and rapidly fibrillated to form thrombus, and thereby a lesion blood vessel is closed. Common intra-luminal thermal ablation closure procedures include intra-luminal laser closure, intra-luminal vapor closure, intra-luminal microwave closure, and the like. The curative effect of the intra-cavity thermal ablation closure is definite, a great amount of evidence-based medical evidence is accumulated at present, a first-line treatment scheme is recommended by a plurality of guidelines, and open surgery is mostly replaced in western countries, however, the intra-cavity thermal ablation closure still has certain disadvantages, such as: the great saphenous vein after the treatment of the intracavity laser closure operation is not completely closed, the postoperative recanalization has more conditions, the retraction speed of the laser fiber in the operation is too high or the compression is too light, so that the residual blood of the blood vessel is too much, the great saphenous vein closure effect is affected, and the postoperative recurrence is easy. Meanwhile, various adverse reactions exist in the intracavity laser closure technique, such as subcutaneous ecchymosis, skin numbness after hidden nerve injury, skin burning sensation and the like. The current clinical application of the intracavity vapor closure operation and the intracavity microwave closure operation is relatively less, and a few researches show that the vein closure rate of three years after the intracavity microwave closure operation is 79.8 percent, the numbness rate of the affected limbs is as high as 32.1 percent, and the curative effect of the two closure operations is yet to be verified due to less evidence-based medical evidence.
The intravenous cavity radio frequency closure technique is used as a first-line treatment method of varicose veins of lower limbs, mainly plays a role in thermally induced venous spasm 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 application provides a venous intracavity radio frequency closing system, which solves the problem that the transmission of the existing venous intracavity radio frequency control energy is inaccurate.
In order to achieve the above purpose, the application adopts the following technical scheme:
in one aspect, a venous intracavity radio frequency closing system is provided, which comprises an EMC module connected with a mains supply, wherein the EMC module is electrically connected with an AC/DC module, the AC/DC module converts the mains supply into two paths of low-voltage direct currents, one path of the low-voltage direct current is connected with an auxiliary power supply processing unit, and the other path of the low-voltage direct current is connected with an output module.
The topology and power control network adopted by the application has simple and clear structure and saves space; the radio frequency energy output by the system can be accurately controlled, the temperature is constantly controlled to be a preset temperature, and the error is between 0 and 3 ℃; the constant temperature control within the range of 90-135 ℃ can be realized, the structure of the electrode conduit cable is simplified, the 8-core design is adopted to cooperate with the manual start and stop of the electrode conduit, and the operation is simple; the temperature of the catheter temperature sensor, the output radio frequency power and the residual time of the treatment period can be displayed in real time; and can adapt to various types of catheters, and is used for treating varicose veins of different patients, and accurately controlling energy transmission.
Further, the output module comprises a DC/DC module, and the DC/DC module 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 DC/RF module is sequentially and electrically connected with the PWM driving unit and the main control unit, and the DC/RF module is further electrically connected with the output correction module.
Further, the DC/DC driving unit comprises a DC voltage sampling unit for sampling a target direct current voltage output by the DC/DC module, a DC voltage sampling conditioning module for filtering and limiting conditioning, a first PWM conditioning module for generating PWM signals and a first PWM driving module for amplifying the PWM signals of the first PWM conditioning module; the DC voltage sampling and conditioning module and the first PWM driving module are electrically connected with the main control unit, and the first PWM driving module is electrically connected with the DC/DC module
Further, the PWM driving unit comprises a second PWM adjusting module for limiting the filtering 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, wherein 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.
Further, 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 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.
Further, the left functional unit comprises a temperature sampling conditioning unit, an audio unit and a fan unit, and the temperature sampling conditioning unit, the audio unit and the fan unit are electrically connected with the main control unit; an LT1025 chip for temperature compensation and an LT1053 chip for constructing a differential signal and conditioning circuit are arranged in the temperature sampling conditioning unit; the audio unit is an MCP4541 digital potentiometer.
Further, the right functional unit comprises a display unit, a pedal unit and a catheter communication unit, and the display unit, the pedal unit and the catheter communication unit are electrically connected with the main control unit; and an STM32L011D4XX communication chip is arranged in the catheter communication unit.
Further, 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 sequentially connected.
The application discloses a venous intracavity radio frequency closing system, which has the beneficial effects that:
the topology and power control network adopted by the application has simple and definite structure, and saves space; the system can accurately control the radio frequency energy output by the system, the temperature of the catheter temperature sensor is constant at the target temperature, and the error is controllable within 3 ℃; the constant temperature control (the resolution is 5 ℃) within the range of 90-135 ℃ can be realized, the structure of the electrode catheter cable is simplified, the 8-core design is adopted, the functions are complete, the electrode catheter is matched for manual start and stop, and the operation is simple; the system has complete functions, monitors various parameters of multiple systems on the basis of realizing target functions, displays the temperature of the catheter temperature sensor in real time, accurately displays the output radio frequency power, and displays the residual time of a treatment period in real time; and adapt to various types of catheters for varicose vein treatment of different patients.
Drawings
Fig. 1 is a schematic diagram of a venous intra-cavity radio frequency closure system.
Fig. 2 is a schematic diagram of an auxiliary power supply processing unit of the intravenous-cavity rf closure system.
Fig. 3 is a schematic diagram of a DC/DC drive unit for a venous intra-cavity radio frequency closure system.
Fig. 4 is a schematic diagram of a DC/RF module of a venous intra-cavity radio frequency closure system.
The device comprises a main control unit, a control unit and a control unit, wherein 1; 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 and conditioning module; 6-3, a first PWM regulating 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 regulating module; 9-2, a second PWM driving module; 9-3, PWM driving isolation module; 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 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 following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that all directional indicators (such as up, down, left, right, front, rear, etc.) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
According to a first embodiment of the present application, referring to fig. 1, a venous intra-cavity radio frequency closure system of the present embodiment includes:
the EMC module 2 is connected with the commercial power, the EMC module 2 is electrically connected with the AC/DC module 3, the AC/DC module 3 converts the commercial power into two paths of low-voltage direct current, one path of the low-voltage direct current is connected with the auxiliary power supply processing unit 4, and the other path of the low-voltage direct current is connected with the output module.
The EMC module 2 of the application carries out radio frequency filtering on the received commercial power (220V-/110V-), and the commercial power is converted into low-voltage direct current through the AC/DC module 3, and the low-voltage direct current is divided into two paths, one path is used for auxiliary power supply, and the other path is used for main power output.
According to a 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 respectively and electrically connected with a DC/DC driving unit 6, a DC current sampling unit 7 and a DC/RF module 8; 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 turn, and the DC/RF module 8 is also electrically connected with the output correction module 10; in order to prevent the RF waveform from being deformed due to the magnetic bias of the power transformer of the DC/RF module 8, the output RF energy needs to be corrected by the output correction module 10.
As a further scheme of the DC/DC driving unit 6 of the present embodiment, referring to fig. 3, the DC/DC driving unit 6 includes a DC voltage sampling unit 6-1 for sampling a target direct current voltage outputted from the DC/DC module 5, a DC voltage sampling conditioning module 6-2 for filtering clipping conditioning, a first PWM adjusting module 6-3 for generating PWM signals, and a first PWM driving module 6-4 for amplifying the PWM signals 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.
The low-voltage direct current is used in the main power output process: when the low-voltage direct current is output through the DC/DC module 5, in order to ensure that the output voltage is constant, the DC/DC driving unit 6 adopts a three-voltage loop design, specifically, in the DC/DC driving unit 6, the DC voltage sampling module 6-1 samples the target direct current voltage output by the DC/DC module 5, the DC voltage sampling conditioning module 6-2 carries out filtering, limiting and conditioning on the sampled target direct current voltage signal and feeds the filtered and limited target direct current voltage signal back to the main control unit 1, the main control unit 1 sets the target direct current voltage to a required voltage value by adjusting the parameter of the first PWM (pulse width modulation) module 6-3, meanwhile, the conditioned target direct current voltage signal generates a PWM signal through the first PWM (pulse width modulation) module 6-3 and carries out a voltage loop according to the sampled voltage value, and finally the PWM signal is amplified through the first PWM driving module 6-4 so as to drive a semiconductor switching device of the DC/DC module 5; meanwhile, when the low-voltage direct current flows through the DC/DC module 5 to be output, the DC current sampling unit 7 samples the current of the target direct current voltage port, filters and limits the sampled current signal, and feeds the current signal back to the main control unit 1; the main control unit 1 receives the conditioned current signals and the conditioned voltage signals, so that the protection processing of the start-stop management and the parameter monitoring of the DC/DC module 5 is realized; the DC/DC module 5 may use the existing UC3842 chip driving excitation topology or flyback topology, or may use the UC3879 chip/UCC 3895 chip driving full bridge topology.
As a further scheme of the PWM driving unit 9 of the present embodiment, referring to fig. 4, the PWM driving unit 9 includes a second PWM adjusting module 9-1 for limiting the filtering current, a second PWM driving module 9-2 for amplifying the output signal, and a PWM driving isolating module 9-3 for amplifying the output signal and displaying isolation, and 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.
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 realize start-stop management and parameter setting (frequency and duty ratio) of the DC/RF module 8, and the method is specific: the second PWM regulating module 9-1 carries out filtering and current limiting treatment on parameters sent by the main control unit 1, the treated 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 the signals are transmitted to the DC/RF module 8, so that the main control unit 1 can realize radio frequency output control on the DC/RF module 8.
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 electrically connected with the main control unit 1; the output correction module 10 is also electrically connected with the temperature sampling 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 configured to detect and filter the peak value of the rf output current, and transmit the detected peak value to the main control unit 1, and if the detected peak value is abnormal, close the output; meanwhile, the corrected radio frequency output is subjected to accurate radio frequency current and voltage sampling respectively through a radio frequency current sampling unit 12 and a radio frequency voltage sampling unit 13 and is transmitted to the main control unit 1, so that the main control unit 1 can realize real acquisition of radio frequency current signals and voltage signals and accurately give out the impedance of the instantaneous catheter heating element.
The radio frequency output of the embodiment is finally transmitted to the electrode catheter 20 to realize output, the temperature sampling 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 varicose vein closing operation.
Wherein the temperature sensor on the electrode catheter 20 may employ a thermocouple; in the temperature sampling conditioning unit 14, an LT1025 chip can be adopted for temperature compensation so as to lead the thermocouple to reach the use standard and increase the consistency; and a differential signal conditioning circuit is built by using an LT1053 chip to filter noise of radio frequency energy during working, and finally, the temperature on the electrode catheter 20 is accurately fed back to the control unit 1.
The electrode catheter 20 has the work pilot lamp, has manual start-stop function, and electrode catheter 20 contains control chip, realizes the communication with the system through pipe communication unit 19, for reducing the total sinle silk quantity of electrode catheter cable, reduces occupied space simultaneously, and electrode catheter adopts the RS485 communication protocol, realizes electrode catheter information uploading, for the system uploading start-stop information, and electrode catheter 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 a third embodiment of the present application, the third embodiment is a further technical solution of the second embodiment, and specifically includes: .
The left functional unit comprises a temperature sampling conditioning unit 14, an audio unit 15 and a fan unit 16, and the temperature sampling conditioning unit 14, the audio unit 15 and the fan unit 16 are electrically connected with the main control unit 1; an LT1025 chip for temperature compensation and an LT1053 chip for constructing a differential signal and conditioning 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 the MCP4541, the audio gain can be accurately controlled, the space is reduced, and the alarm prompt is carried out on faults through the 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 functional unit comprises a display unit 17, a pedal unit 18 and a catheter communication unit 19, and the display unit 17, the pedal unit 18 and the catheter communication unit 19 are 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, and displays the current electrode catheter type, the real-time temperature of the electrode catheter, the residual time of the treatment period and the power related parameters on a human-computer interaction processing interface; the foot pedal unit 18 is electrically connected with the main control unit 1 and is used for switching the working state of the system.
According to a fourth embodiment of the present application, the fourth embodiment is a further technical solution in the first embodiment, and specifically includes: .
Referring to fig. 2, the auxiliary power supply processing unit 4 includes 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 sequentially connected.
As a further solution of the auxiliary power supply processing unit 4 of the present embodiment, low voltage dc is used for the auxiliary power supply process: the low-voltage direct current is firstly filtered by a first DC filtering module 4-1 in the auxiliary power supply processing unit 4 to remove high-frequency components in the switching power supply, then is detected by an input voltage protection module 4-2 to detect whether the direct current voltage is correct, is then isolated by a DC/DC isolating module 4-3 to isolate a power supply network and a main power output circuit of the system, is filtered by a second DC filtering module 4-4 to remove high-frequency noise in the DC/DC isolating module 4-3, and is finally used for supplying power to control circuits and the like of the system.
The using method of the system comprises the following steps:
1. and switching on a power supply, pressing a power switch, performing self-checking by the system, and entering a main page by the display screen if the self-checking passes. Otherwise, the display screen prompts error information and gives out alarm sound.
2. The system inquires and confirms the conduit information (inquiring whether the conduit is the conduit which is matched with the system, confirming the model specification of the conduit), if the conduit is connected with the conduit socket of the conduit access system, the display screen displays the conduit icon and the related information.
3. If the foot switch is needed, the foot switch is connected, the system inquires the foot information, and corresponding icons are displayed on the display screen. When the foot pedal is stepped on, or the start-stop switch of the catheter is pressed, the working state of the system is switched. If the current state of the system is standby, the system performs the working state of radio frequency output.
4. After the system enters a working state, the system firstly acquires a real temperature value of a current electrode catheter temperature sensor; comparing the current 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 magnitude of the radio frequency output energy; finally, the system controls the output radio frequency energy to realize that the temperature of the catheter is constant at the target temperature of the electrode catheter.
Although specific embodiments of the application have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (5)
1. A venous intraluminal radio frequency closure system, characterized by: the power supply system comprises an EMC module (2) connected with a mains supply, wherein the EMC module (2) is electrically connected with an AC/DC module (3), the AC/DC module (3) converts the mains supply into two paths of low-voltage direct current, one path of the low-voltage direct current is connected with an auxiliary power supply processing unit (4), and the other path of the low-voltage direct current is connected with an output module;
the output module comprises a DC/DC module (5), and the DC/DC module (5) is respectively and electrically connected with the DC/DC driving unit (6), the DC current sampling unit (7) and the DC/RF module (8); 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 sequentially and electrically connected with the PWM driving unit (9) and the main control unit (1), and the DC/RF module (8) is also electrically connected with the output correction module (10);
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 and limiting conditioning, a first PWM (pulse width modulation) conditioning module (6-3) for generating PWM signals and a first PWM driving module (6-4) for amplifying the PWM signals of the first PWM conditioning module (6-3); the DC voltage sampling unit (6-1), the DC voltage sampling conditioning module (6-2), the first PWM regulating 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 regulating 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);
the PWM driving unit (9) comprises a second PWM adjusting module (9-1) for limiting filtering and current, a second PWM driving module (9-2) for amplifying an output signal and a PWM driving isolation module (9-3) for amplifying the output signal and displaying isolation, wherein the second PWM adjusting module (9-1), the second PWM driving module (9-2) and the PWM driving isolation module (9-3) are sequentially connected, and the PWM driving isolation module (9-3) is electrically connected with the DC/RF module (8).
2. The intravenous intracavity radio frequency closure system of claim 1 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 electrically connected with the main control unit (1); the output correction module (10) is also electrically connected with the temperature sampling 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.
3. The intravenous intracavity radio frequency closure system of claim 2 wherein: the left functional unit comprises a temperature sampling conditioning unit (14), an audio unit (15) and a fan unit (16), wherein the temperature sampling conditioning unit (14), the audio unit (15) and the fan unit (16) are electrically connected with the main control unit (1); a chip for temperature compensation and a chip for constructing a differential signal and conditioning a circuit are arranged in the temperature sampling conditioning unit (14); the audio unit (15) is a digital potentiometer.
4. The intravenous intracavity radio frequency closure system of claim 2 wherein: the right functional unit comprises a display unit (17), a pedal unit (18) and a catheter communication unit (19), wherein the display unit (17), the pedal unit (18) and the catheter communication unit (19) are electrically connected with the main control unit (1); a communication chip is arranged in the catheter communication unit (19).
5. The intravenous intracavity 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 sequentially connected.
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| CN116158832A (en) * | 2023-02-22 | 2023-05-26 | 上海玮琅医疗科技有限公司 | Intravenous cavity radio frequency closure generator system, method and device |
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| CN109245745A (en) * | 2018-10-29 | 2019-01-18 | 深圳可思美科技有限公司 | A kind of signal generating method, device and radio-frequency unit |
| CN214231499U (en) * | 2020-11-10 | 2021-09-21 | 江苏邦士医疗科技有限公司 | Blood vessel closing system based on plasma control strategy |
| CN113824309A (en) * | 2020-06-12 | 2021-12-21 | 杭州诺诚医疗器械有限公司 | Radio frequency ablation power supply and radio frequency ablation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109245745A (en) * | 2018-10-29 | 2019-01-18 | 深圳可思美科技有限公司 | A kind of signal generating method, device and radio-frequency unit |
| CN113824309A (en) * | 2020-06-12 | 2021-12-21 | 杭州诺诚医疗器械有限公司 | Radio frequency ablation power supply and radio frequency ablation system |
| CN214231499U (en) * | 2020-11-10 | 2021-09-21 | 江苏邦士医疗科技有限公司 | Blood vessel closing system based on plasma control strategy |
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