Intravenous radio frequency closed catheter control system

Abstract

The invention provides an intravenous radio frequency closed catheter control system, and relates to the technical field of medical instruments, the system comprises a main control unit, and a communication module, an impedance control module, a display screen, a key module and an auxiliary power supply which are electrically connected with the main control unit, the main control unit is used for outputting an impedance control signal to the impedance control module through the communication module according to a key signal, the display screen is used for displaying the working state of the multi-section catheter coil, and the auxiliary power supply is used for supplying power to the impedance control circuit, the communication module, the display screen and the button module. And the impedance control module controls the switching of the working impedance of the multi-section catheter coil according to the control signal so as to control the radio frequency closed catheter in the venous cavity. Accurate switching control and combination of the multi-section catheter coil can be achieved, clinical diversity requirements and operator skill diversification are met, and the vein closing effect is improved.

Description

Technical Field

[0001] The present specification relates to the field of medical device technology, and in particular to an intravenous radiofrequency closed catheter control system. Background Art

[0002] The main treatments for varicose veins include laser, radiofrequency, microwave and electrocoagulation. Compared with the earlier stripping methods, these procedures have less surgical trauma, fewer complications and faster postoperative recovery. In addition, there are currently procedures for treating varicose veins by injecting sclerosants into the target blood vessels. As for mainstream treatment methods, the safety and reliability of thermal ablation through radiofrequency is gradually being accepted by hospitals and patients. The treatment principle of radiofrequency is to use controlled radiofrequency energy to achieve radiofrequency heating of the heating element on the catheter, and to adjust the temperature through feedback from the thermocouple, and finally apply thermal energy to the treatment site to achieve the treatment of varicose veins.

[0003] In the treatment method of ablation by radio frequency, the treatment section of the catheter is generally a metal hollow tube or a heating coil. For example, the prior art CN221285889U provides an intravenous radio frequency closure catheter, and the entire coil heats up at the same time when the treatment section is working. However, with the increase in the number of patients with varicose veins, diversified needs of clinical surgery have arisen. For example, the local transitional bending of the patient's venous blood vessels makes it impossible for the catheter to completely fit the blood vessels, requiring local ablation. In addition, the length of the venous blood vessels is not an integer multiple of the length of the catheter coil, resulting in repeated ablation of a part of the vein. These new needs can only use a small section of the coil for work, and cannot use the entire working section for ablation, otherwise the normal tissue around the blood vessels will be damaged due to excessive ablation. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an intravenous radiofrequency closed catheter control system which solves the problem that the intravenous radiofrequency closed catheter is difficult to accurately control in sections.

[0005] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: a control system for intravenous radiofrequency closed catheter, comprising:

[0006] A main control unit, a communication module, an impedance control module, a display screen, a button module and an auxiliary power supply electrically connected to the main control unit, wherein the button module is used to obtain a button signal on the handle, the main control unit is used to output an impedance control signal to the impedance control module through the communication module according to the button signal, the display screen is used to display the working status of the multi-segment catheter coil, the auxiliary power supply is used to power the impedance control circuit, the communication module, the display screen and the button module, and the impedance control module controls the switching of the working impedance of the multi-segment catheter coil according to the control signal to complete the control of the intravenous radiofrequency closed catheter.

[0007] Furthermore, the impedance control module includes an impedance control circuit and a relay unit, wherein the impedance control circuit is used to receive the control signal of the main control unit and transmit it to the relay unit; and the relay unit is used to switch the working impedance of the catheter coil based on the control signal.

[0008] Furthermore, the multi-segment catheter coil includes at least three segments of coil impedance R1, R2 and R3, and the relay unit includes at least two relays RL1 and RL2.

[0009] Furthermore, the impedance control circuit includes: a chip U5, a resistor R14, a resistor R15, a resistor R16, a grounding capacitor C7, a grounding capacitor C8, a grounding capacitor C9, a relay RL1 and a relay RL2; wherein, the first pin of the chip U5 is respectively connected to one end of the resistor R14 and the grounding capacitor C7, the second pin of the chip U5 is respectively connected to one end of the resistor R15 and the grounding capacitor C8, the fourth pin of the chip U5 is connected to the main control unit, the ninth pin of the chip U5 is grounded, the tenth pin of the chip U5 is respectively connected to the grounding capacitor C9 and one end of the resistor R16, the seventeenth pin of the chip U5 is connected to the relay RL2, the eighteenth pin of the chip U5 is connected to the relay RL1, the other end of the resistor R14 and the other end of the resistor R15 are both connected to the communication module, and the other end of the resistor R16 is connected to the auxiliary power supply.

[0010] Furthermore, the relay RL1 and relay RL2 include: a coil of relay RL1, a normally open contact of relay RL1, a normally closed contact of relay RL1, a coil of relay RL2, a normally open contact of relay RL2, and a normally closed contact of relay RL2; wherein, the coil of relay RL1 is connected to the eighteenth pin of chip U5, the coil of relay RL2 is connected to the seventeenth pin of chip U5, one end of the coil impedance R1 is connected to the normally open contact of relay RL2, one end of the coil impedance R2 is connected to the normally open contact of relay RL1, one end of the coil impedance R3 is connected to the normally closed contact of relay RL1, and the other end of the coil impedance R1, the other end of the coil impedance R2 and the other end of the coil impedance R3 are all connected to the common terminal RF1.

[0011] Further, the communication module includes: a chip U4, a resistor R9, a resistor R10, a resistor R11, a grounding resistor R12, a resistor R13 and a grounding capacitor C3; wherein, the sixth pin of the chip U4 is respectively connected to one end of the resistor R9 and the other end of the resistor R14, the seventh pin of the chip U4 is respectively connected to the other end of the resistor R9 and the other end of the resistor R15, the first pin of the chip U4 is connected to one end of the resistor R10, the second pin and the third pin of the chip U4 are both connected to one end of the resistor R11 and the grounding resistor R12, the fourth pin of the chip U4 is connected to one end of the resistor R13, the fifth pin of the chip U4 is grounded, the eighth pin of the chip U4 is respectively connected to the auxiliary power supply and the grounding capacitor C3, the other end of the resistor R10 is connected to the UART sending port of the main control unit, the other end of the resistor R11 is connected to the UART debugging port of the main control unit, and the other end of the resistor R13 is connected to the UART receiving port of the main control unit.

[0012] Furthermore, the auxiliary power supply includes: a chip U3, a grounding capacitor C4 and a grounding capacitor C5; wherein the first pin of the chip U3 is a +5V power supply terminal, and is respectively connected to the grounding capacitor C4 and the eighth pin of the chip U4, the second pin and the third pin of the chip U3 are grounded, the fourth pin of the chip U3 is connected to the grounding capacitor C5, and the fifth pin of the chip U3 is a 3V3 power supply terminal, and is respectively connected to the other end of the resistor R16, the display screen and the button module.

[0013] Furthermore, the display screen includes: a chip U2, a resistor R1 and a grounding resistor R5; wherein the second pin of the chip U2 is connected to one end of the resistor R1, the sixth pin of the chip U2 and the other end of the resistor R1 are both connected to the fifth pin of the chip U3, the first pin and the seventh pin of the chip U2 are grounded, the third pin of the chip U2 is connected to the grounding resistor R5, the fourth pin of the chip U2 is connected to the data port of the main control unit, and the fifth pin of the chip U2 is connected to the clock port of the main control unit.

[0014] Furthermore, the button module includes: a switch K1, a grounding capacitor C6 and a resistor R8; wherein one end of the resistor R8 is connected to the fifth pin of the chip U3, the other end of the resistor R8 is respectively connected to one end of the switch K1, the grounding capacitor C6 and the switch detection port of the main control unit, and the other end of the switch K1 is grounded.

[0015] The beneficial effects of the present invention are: a control system for intravenous radiofrequency closure catheter, which can realize accurate switching and combined control of multi-segment catheter coils, better ablate local and curved veins, prevent repeated and excessive heating from burning surrounding normal tissues, meet the diverse clinical needs and the diversity of operator techniques, improve the effect of vein closure, and only need to be improved on the handle catheter end without modifying the host hardware structure. It can be directly adapted to the original host, and provides convenient and user-friendly interaction methods such as buttons and OLED displays. The circuit structure is simple, efficient, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0017] Figure 1 It is a module schematic diagram of a control system of a radiofrequency closed catheter in a vein cavity according to some embodiments of this specification;

[0018] Figure 2 is an exemplary schematic diagram of impedance of a three-segment catheter coil according to some embodiments of the present specification;

[0019] Figure 3 is an exemplary schematic diagram of a three-segment catheter coil impedance connection according to some embodiments of this specification;

[0020] Figure 4 is an exemplary schematic diagram of coil impedance selection access logic according to some embodiments of this specification;

[0021] Figure 5 is an exemplary schematic diagram of a coil impedance control circuit according to some embodiments of this specification;

[0022] Figure 6 is an exemplary schematic diagram of a communication module circuit according to some embodiments of this specification;

[0023] Figure 7 is an exemplary schematic diagram of an OLED display screen circuit according to some embodiments of this specification;

[0024] Figure 8is an exemplary schematic diagram of an auxiliary power supply circuit according to some embodiments of this specification;

[0025] Fig. 9 is an exemplary schematic diagram of a button circuit according to some embodiments of the present specification. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0027] Example

[0028] Figure 1 It is a module schematic diagram of an intravenous radiofrequency closed catheter control system according to some embodiments of the present specification.

[0029] like Figure 1 As shown, in some embodiments, a control system for an intravenous radiofrequency closed catheter may include a main control unit, a communication module electrically connected to the main control unit, an impedance control module, a display screen, a button module and an auxiliary power supply, wherein the button module is used to obtain a button signal on the handle, the main control unit is used to output an impedance control signal to the impedance control module through the communication module according to the button signal, the display screen is used to display the working status of a multi-segment catheter coil, the auxiliary power supply is used to power the impedance control circuit, the communication module, the display screen and the button module, and the impedance control module controls the switching of the working impedance of the multi-segment catheter coil according to the control signal to complete the control of the intravenous radiofrequency closed catheter.

[0030] In some embodiments, an intravenous radiofrequency closure catheter control system may be applied to the handle end.

[0031] The multi-segment catheter coil comprises at least three segments of coils, each segment of the coil (sub-coil) forms an independent impedance and can be combined. After each impedance is connected in parallel to the radio frequency energy transmission circuit, current passes through and generates heat. In this embodiment, the catheter treatment segment coil is divided into three independent sub-coils, and the corresponding impedances are represented by R1, R2, and R3, respectively. Figure 2As shown, the actual length of each sub-coil can be set according to demand. For example, a coil with a total length of 7 cm can be divided into three sub-coil impedances of 1CM, 2CM, 4CM or 3CM, 3CM, 1CM, etc., and then the button module is used to select and send a control signal to the impedance control module through the main control unit. The impedance control module selects (or switches) at least one of the sections to be connected to the RF circuit to form a working impedance according to the control signal. The connection relationship and combination logic are shown in Figure 3 , Figure 4 As shown;

[0032] Specifically, the impedance control module includes an impedance control circuit and a relay unit. The impedance control circuit receives a control signal from the main control unit and sends it to the relay unit after processing. The relay unit performs corresponding actions according to the control signal, that is, connects and / or switches the working impedance of the catheter sub-coil; the relay unit can use at least two relays RL1 and RL2 connected in parallel to the radio frequency loop.

[0033] In some embodiments, Figure 5 As shown, the impedance control circuit includes: a chip U5, a resistor R14, a resistor R15, a resistor R16, a grounding capacitor C7, a grounding capacitor C8, a grounding capacitor C9, a relay RL1 and a relay RL2; wherein, the first pin of the chip U5 is respectively connected to one end of the resistor R14 and the grounding capacitor C7, the second pin of the chip U5 is respectively connected to one end of the resistor R15 and the grounding capacitor C8, the fourth pin of the chip U5 is connected to the main control unit, the ninth pin of the chip U5 is grounded, the tenth pin of the chip U5 is respectively connected to the grounding capacitor C9 and one end of the resistor R16, the seventeenth pin of the chip U5 is connected to the relay RL2, the eighteenth pin of the chip U5 is connected to the relay RL1, the other end of the resistor R14 and the other end of the resistor R15 are both connected to the communication module, and the other end of the resistor R16 is connected to the auxiliary power supply.

[0034] Furthermore, the relay RL1 and relay RL2 include: a coil of relay RL1, a normally open contact of relay RL1, a normally closed contact of relay RL1, a coil of relay RL2, a normally open contact of relay RL2, and a normally closed contact of relay RL2; wherein, the coil of relay RL1 is connected to the eighteenth pin of chip U5, the coil of relay RL2 is connected to the seventeenth pin of chip U5, one end RF-2A of the coil impedance R1 is connected to the normally open contact of relay RL2, one end RF-2B of the coil impedance R2 is connected to the normally open contact of relay RL1, one end RF-2C of the coil impedance R3 is connected to the normally closed contact of relay RL1, and the other end of the coil impedance R1, the other end of the coil impedance R2 and the other end of the coil impedance R3 are all connected to the common end RF1.

[0035] In some embodiments, the communication module includes: a chip U4, a resistor R9, a resistor R10, a resistor R11, a grounding resistor R12, a resistor R13 and a grounding capacitor C3; wherein, the sixth pin of the chip U4 is respectively connected to one end of the resistor R9 and the other end of the resistor R14, the seventh pin of the chip U4 is respectively connected to the other end of the resistor R9 and the other end of the resistor R15, the first pin of the chip U4 is connected to one end of the resistor R10, the second pin and the third pin of the chip U4 are both connected to one end of the resistor R11 and the grounding resistor R12, the fourth pin of the chip U4 is connected to one end of the resistor R13, the fifth pin of the chip U4 is grounded, the eighth pin of the chip U4 is respectively connected to the auxiliary power supply and the grounding capacitor C3, the other end of the resistor R10 is connected to the UART sending port of the main control unit, the other end of the resistor R11 is connected to the UART debugging port of the main control unit, and the other end of the resistor R13 is connected to the UART receiving port of the main control unit.

[0036] like Figure 8 As shown, the auxiliary power supply includes: a chip U3, a grounding capacitor C4 and a grounding capacitor C5; wherein the first pin of the chip U3 is a +5V power supply terminal, and is respectively connected to the grounding capacitor C4 and the eighth pin of the chip U4, the second pin and the third pin of the chip U3 are grounded, the fourth pin of the chip U3 is connected to the grounding capacitor C5, and the fifth pin of the chip U3 is a 3V3 power supply terminal, and is respectively connected to the other end of the resistor R16, the display screen and the button module.

[0037] like Figure 7 As shown, the display screen circuit includes: a chip U2, a resistor R1 and a grounding resistor R5; wherein the second pin of the chip U2 is connected to one end of the resistor R1, the sixth pin of the chip U2 and the other end of the resistor R1 are both connected to the fifth pin of the chip U3, the first pin and the seventh pin of the chip U2 are grounded, the third pin of the chip U2 is connected to the grounding resistor R5, the fourth pin of the chip U2 is connected to the data port of the main control unit, and the fifth pin of the chip U2 is connected to the clock port of the main control unit.

[0038] like Fig. 9 As shown, the button module includes: a switch K1, a grounding capacitor C6 and a resistor R8; wherein one end of the resistor R8 is connected to the fifth pin of the chip U3, the other end of the resistor R8 is respectively connected to one end of the switch K1, the grounding capacitor C6 and the switch detection port of the main control unit, and the other end of the switch K1 is grounded.

[0039] The connection relationship of the above circuit is as follows: one end of the R1 segment coil impedance is connected to the normally open contact of the relay RL2 through the RF-2A port, one end of the R2 and R3 segment coil impedances are respectively connected to the normally open and normally closed contacts of the relay RL1 through the RF-2B and RF-2C ports, the other ends of the R1, R2, and R3 segment coil impedances are connected to the RF1 common port, the relays RL1 and RL2 are respectively connected to the impedance control circuit through the RxBC and RxAC ports, the impedance control circuit is connected to the A and B ports of the communication module through the EN_2AC and EN_2BC interfaces, the control signal is transmitted between the communication module and the main control unit through the UART interface, RF2 is a fixed port of the relay, RF2 and RF1 are respectively connected to the two poles of the host RF generation module through wires to form an RF energy transmission loop, such as Figure 2 , 3 , 4, 5 and Figure 6 As shown, the figure only shows as an example that RF-2C is used as a normally closed port so that R3 does not need to be selected by a button. If the RF-2A and RF-2B ports are normally open, you can use the button to select whether R1 and R2 are connected. If you need to set a button to select R3, you can also add another relay to connect to RF-2C.

[0040] In some embodiments, the main control unit may use a microcontroller such as a GD32F330 chip, which is electrically connected to the communication module, display screen, button module and impedance control module in this embodiment through its corresponding pin ports.

[0041] In some embodiments, as shown in Table 1, the main control unit may include a UART transmitting port, a UART debugging port, a UART receiving port, a data port, a clock port and a switch detection port; wherein the UART transmitting port is connected to the other end of the resistor R10, the UART debugging port is connected to the other end of the resistor R11, the UART receiving port is connected to the other end of the resistor R13, the data port is connected to the fourth pin of the chip U2, the clock port is connected to the fifth pin of the chip U2, and the switch detection port is connected to the other end of the resistor R8, one end of the switch K1 and the grounding capacitor C6.

[0042] Table 1 Main control unit connection relationship table

[0043]

[0044] The working principle of the whole system is as follows: by connecting the catheter to the main unit, the front end of the catheter is sent into the vein of the lower limb under ultrasound guidance; the medical staff determines the catheter sub-coil to be used according to the position, length, curvature, etc. of the vein to be closed. Only one section can be selected, or multiple sections can be selected at the same time. For example, if the length of the vein to be closed is 4CM, only R3=4CM sub-coil can be selected, or R3=1CM and R2=3CM sub-coils can be selected. Similarly, if the length of the vein to be closed is 7CM, R3, R2, and R1 sub-coils can be selected at the same time; if the length of the vein to be closed is 8CM, R3=4CM sub-coil can be selected for two consecutive ablations;

[0045] Then, according to the selected sub-coil, the corresponding button on the handle button is pressed (corresponding buttons can be set on the handle corresponding to each sub-coil, and the button circuit of each button can be connected in parallel), the main control unit detects the key signal and analyzes the information of the sub-coil to be connected or switched, and then sends the control signal corresponding to the sub-coil information to the impedance control module through the UART interface of the communication module;

[0046] The impedance control module controls the relay according to the control signal to connect / disconnect the corresponding sub-coil to the RF energy transmission circuit, and sends the working status of each sub-coil impedance through the main control unit and displays it on the OLED display screen. Then, the treatment program is started on the host connected to the catheter cable for ablation treatment, so as to realize accurate switching control of the sub-coils according to actual needs and combine them into working coils of different lengths. For example, when local ablation is performed at excessive bends in the veins, or when a small part remains after the entire coil is used for ablation and the entire coil cannot be used for work, one or several sub-coils can be selected to fit the bends or the remaining parts for local heating, so as to better ablate the local and bends of the veins, prevent repeated and excessive heating at the local or bends and burn the surrounding normal tissues, and improve the effect of venous closure.

[0047] In some embodiments of the present specification, a venous intracavity radiofrequency closure catheter control system is provided, which can realize accurate switching control and combination of multi-segment catheter coils, meet the diverse clinical needs and operator techniques, improve the effect of venous closure, and only need to be improved on the catheter end without modifying the host hardware structure. It can be directly adapted to the original host, and provides convenient and user-friendly interaction methods such as buttons and OLED displays. The circuit structure is simple, efficient, safe and reliable.

Claims

1. A control system for intravenous radiofrequency closed catheter, characterized in that: include: A main control unit, a communication module, an impedance control module, a display screen, a button module and an auxiliary power supply electrically connected to the main control unit, wherein the button module is used to obtain a button signal on the handle, the main control unit is used to output an impedance control signal to the impedance control module through the communication module according to the button signal, the display screen is used to display the working status of the multi-segment catheter coil, the auxiliary power supply is used to power the impedance control circuit, the communication module, the display screen and the button module, and the impedance control module controls the switching of the working impedance of the multi-segment catheter coil according to the control signal to complete the control of the intravenous radiofrequency closed catheter.

2. The intravenous radiofrequency closed catheter control system according to claim 1, characterized in that: The impedance control module includes an impedance control circuit and a relay unit. The impedance control circuit is used to receive the control signal of the main control unit and transmit it to the relay unit; the relay unit is used to switch the working impedance of the catheter coil based on the control signal.

3. The intravenous radiofrequency closed catheter control system according to claim 2, characterized in that: The multi-segment catheter coil includes at least three segments of coil impedance R1, R2 and R3, and the relay unit includes at least two relays RL1 and RL2.

4. The intravenous radiofrequency closed catheter control system according to claim 3, characterized in that: The impedance control circuit includes: a chip U5, a resistor R14, a resistor R15, a resistor R16, a grounding capacitor C7, a grounding capacitor C8, a grounding capacitor C9, a relay RL1 and a relay RL2; wherein, a first pin of the chip U5 is respectively connected to one end of the resistor R14 and the grounding capacitor C7, a second pin of the chip U5 is respectively connected to one end of the resistor R15 and the grounding capacitor C8, a fourth pin of the chip U5 is connected to the main control unit, a ninth pin of the chip U5 is grounded, a tenth pin of the chip U5 is respectively connected to the grounding capacitor C9 and one end of the resistor R16, a seventeenth pin of the chip U5 is connected to the relay RL2, an eighteenth pin of the chip U5 is connected to the relay RL1, the other end of the resistor R14 and the other end of the resistor R15 are both connected to the communication module, and the other end of the resistor R16 is connected to the auxiliary power supply.

5. The intravenous radiofrequency closed catheter control system according to claim 4, characterized in that: The relay RL1 and relay RL2 include: a coil of relay RL1, a normally open contact of relay RL1, a normally closed contact of relay RL1, a coil of relay RL2, a normally open contact of relay RL2, and a normally closed contact of relay RL2; wherein, the coil of relay RL1 is connected to the eighteenth pin of chip U5, the coil of relay RL2 is connected to the seventeenth pin of chip U5, one end of the coil impedance R1 is connected to the normally open contact of relay RL2, one end of the coil impedance R2 is connected to the normally open contact of relay RL1, one end of the coil impedance R3 is connected to the normally closed contact of relay RL1, and the other end of the coil impedance R1, the other end of the coil impedance R2 and the other end of the coil impedance R3 are all connected to the common terminal RF1.

6. The intravenous radiofrequency closed catheter control system according to claim 5, characterized in that: The communication module includes: a chip U4, a resistor R9, a resistor R10, a resistor R11, a grounding resistor R12, a resistor R13 and a grounding capacitor C3; wherein, the sixth pin of the chip U4 is respectively connected to one end of the resistor R9 and the other end of the resistor R14, the seventh pin of the chip U4 is respectively connected to the other end of the resistor R9 and the other end of the resistor R15, the first pin of the chip U4 is connected to one end of the resistor R10, the second pin and the third pin of the chip U4 are both connected to one end of the resistor R11 and the grounding resistor R12, the fourth pin of the chip U4 is connected to one end of the resistor R13, the fifth pin of the chip U4 is grounded, the eighth pin of the chip U4 is respectively connected to the auxiliary power supply and the grounding capacitor C3, the other end of the resistor R10 is connected to the UART sending port of the main control unit, the other end of the resistor R11 is connected to the UART debugging port of the main control unit, and the other end of the resistor R13 is connected to the UART receiving port of the main control unit.

7. The intravenous radiofrequency closed catheter control system according to claim 6, characterized in that: The auxiliary power supply includes: a chip U3, a grounding capacitor C4 and a grounding capacitor C5; wherein the first pin of the chip U3 is a +5V power supply terminal, and is respectively connected to the grounding capacitor C4 and the eighth pin of the chip U4, the second pin and the third pin of the chip U3 are grounded, the fourth pin of the chip U3 is connected to the grounding capacitor C5, and the fifth pin of the chip U3 is a 3V3 power supply terminal, and is respectively connected to the other end of the resistor R16, the display screen and the button module.

8. The intravenous radiofrequency closed catheter control system according to claim 7, characterized in that: The display screen includes: a chip U2, a resistor R1 and a grounding resistor R5; wherein the second pin of the chip U2 is connected to one end of the resistor R1, the sixth pin of the chip U2 and the other end of the resistor R1 are both connected to the fifth pin of the chip U3, the first pin and the seventh pin of the chip U2 are grounded, the third pin of the chip U2 is connected to the grounding resistor R5, the fourth pin of the chip U2 is connected to the data port of the main control unit, and the fifth pin of the chip U2 is connected to the clock port of the main control unit.

9. The intravenous radiofrequency closed catheter control system according to claim 8, characterized in that: The button module includes: a switch K1, a grounding capacitor C6 and a resistor R8; wherein one end of the resistor R8 is connected to the fifth pin of the chip U3, the other end of the resistor R8 is respectively connected to one end of the switch K1, the grounding capacitor C6 and the switch detection port of the main control unit, and the other end of the switch K1 is grounded.

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