Radio frequency closure device for veins

Abstract

The present application relates to a radio frequency closing device for vein, belonging to the technical field of medical devices, solves the risk of burning through the vein in the working process of the ablation catheter, solves the problem of the bending part that may pierce the vein blood vessel, causes damage to the health of the patient. The present application comprises a radio frequency tube, a driving unit and a control unit, the radio frequency tube and the control unit are connected with the driving unit, the driving unit is used for controlling the radio frequency tube to be delivered to the target area in the blood vessel, and the radio frequency tube is used for ablation closing varicose vein. The resistance measuring module of the present application measures the resistance value of the head end working area, and sends the resistance value to the control unit in real time, the control unit judges according to the comparison result, if there is a risk of blood vessel piercing or a risk of burning through the vein, the control unit sends an instruction to the driving motor, the driving motor reverses, the radio frequency tube retreats to the driving unit direction, prevents the radio frequency tube from piercing the blood vessel or repeatedly burning through the blood vessel, avoids the damage to the health of the patient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a radiofrequency closure device for veins. Background Technology

[0002] Varicose veins refer to the tortuous and dilated veins caused by factors such as blood stasis and weak vein walls. It is a venous disease with a wide impact, usually occurring in the superficial venous system of the lower limbs, with the great saphenous vein and small saphenous vein being the most common sites of disease. When symptoms appear, the affected area bulges and is unsightly. In severe cases, there may be swelling, heaviness, pain, and even ulceration of the affected area and a variety of serious complications.

[0003] During varicose vein treatment, doctors manually insert an ablation catheter into the vein. The ablation zone of the catheter generates high temperatures to ablate the lesions. After each ablation session, the vessel wall undergoes changes, altering its electrical resistance. Repeated ablation carries the risk of burning through the vessel and causing damage.

[0004] During the process of inserting the ablation catheter into the lesion area within the vein, the ablation catheter needs to pass through the bends in the vein. Due to the manual operation, if the ablation catheter cannot pass through the bends in the vein smoothly, there is a risk that the ablation catheter may penetrate the blood vessel wall, causing harm to the patient's health. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a radiofrequency closure device for veins, which solves the problem that ablation catheters in existing technologies may puncture the bent portion of veins, causing harm to the patient's health.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] The present invention provides a radiofrequency closure device for veins, comprising a radiofrequency tube, a driving unit, and a control unit. The radiofrequency tube and the control unit are both connected to the driving unit. The driving unit is used to deliver the radiofrequency tube to a target area in the blood vessel. The radiofrequency tube is used to ablate varicose veins.

[0008] Furthermore, the radio frequency tube includes a tube body and a head section, wherein the head section is disposed on the tube body.

[0009] Furthermore, the head section is a cone and has a guide surface.

[0010] Furthermore, the radio frequency tube also includes a radio frequency block, which is disposed on the tube body and connected to the control unit.

[0011] Furthermore, the driving unit includes a housing, a main driving component, and an auxiliary driving component, both of which are disposed on the housing; the radio frequency tube can pass through the housing, be driven by the main driving component and the auxiliary driving component, and puncture the blood vessel.

[0012] Furthermore, the main drive assembly includes a drive wheel and a drive motor. The drive wheel is rotatably connected to the inner wall of the box via a rotating shaft, and the drive motor is fixedly connected to the inner wall of the box.

[0013] Furthermore, an anti-slip layer is provided on the rolling surface of the drive wheel to increase the friction of the drive wheel.

[0014] Furthermore, the anti-slip layer is a rubber layer.

[0015] Furthermore, the control unit includes a display module and a power module, both of which are mounted on the housing.

[0016] Furthermore, the control unit also includes a speed adjustment handwheel, which is disposed on the housing and is used to adjust the speed of the drive motor.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) If the head segment of the present invention pierces the blood vessel wall, the resistance measuring module measures the resistance value of the blood vessel wall and sends the resistance value to the control unit in real time. The control unit determines that the blood vessel has been punctured based on the comparison result, sends a command to the drive motor, the drive motor reverses, and the radio frequency tube retracts towards the drive unit to prevent the radio frequency tube from puncturing the blood vessel and avoids damage to the patient's health.

[0019] (2) The control unit of the radiofrequency closure device of the present invention can heat each radiofrequency block individually, and medical staff can control the length of the ablation area; a single radiofrequency tube including multiple radiofrequency blocks can be used for lesion areas of different lengths, reducing the frequency of changing the radiofrequency tube or not changing the radiofrequency tube, shortening the operation time and improving the operation efficiency.

[0020] (3) The driving unit of the present invention can use electricity to drive the radio frequency tube to move, which saves the physical strength of medical staff, and allows medical staff to focus more attention on avoiding the bending part of the vein with the ablation catheter, thus improving the efficiency of the operation.

[0021] (4) The positioning spring of the present invention can push the wheel frame and the driven wheel in the direction of the drive wheel. The driven wheel can push various radio frequency tubes of different thicknesses toward the drive wheel, ensuring that both the drive wheel and the driven wheel can firmly clamp radio frequency tubes of different diameters.

[0022] (5) The inflatable sealing airbag of the present invention can achieve a seal between the radio frequency tube and the sheath unit, preventing blood from entering the box along with the radio frequency tube and avoiding damage to the control unit; it can also prevent blood from contaminating the rolling surface of the drive wheel and avoid causing the drive wheel to slip.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the closing device;

[0025] Figure 2 This is a schematic diagram of the overall structure of the radio frequency tube;

[0026] Figure 3 This is a schematic diagram of the overall structure of the drive unit;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the drive wheel shaft;

[0028] Figure 5 This is a schematic diagram of the longitudinal section structure of the sheath unit;

[0029] Figure 6 This is a schematic diagram of the overall structure of the adapter unit.

[0030] Figure label:

[0031] 1-RF tube; 2-Drive unit; 3-Control unit; 4-Sealing unit; 5-Adapter unit; 6-Drainage valve; 11-Tube body; 12-Head section; 13-RF block; 21-Box; 22-Drive wheel; 23-Drive motor; 24-Drive gear; 25-Driven gear; 26-Driven wheel; 27-Wheel frame; 28-Fixing block; 29-Positioning rod; 30-Positioning spring; 31-First electrode plate; 32-Second electrode plate; 33-Display module; 34-Power module; 35-Speed ​​control handwheel; 41-Sheath body; 42-Flange; 51-Snap-fit ​​seat; 52-Connecting plate; 53-Locking protrusion; 54-Pressure plate; 61-Sealing airbag; 221-Wheel body; 222-First annular groove; 223-Second annular groove. Detailed Implementation

[0032] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0033] like Figure 1 As shown, a radiofrequency closure device for veins (hereinafter referred to as the closure device) includes a radiofrequency tube 1, a drive unit 2, and a control unit 3. Both the radiofrequency tube 1 and the control unit 3 are connected to the drive unit 2. The drive unit 2 is used to deliver the radiofrequency tube 1 to a target area in the blood vessel and to withdraw it to the next target area. The radiofrequency tube 1 radiofrequency closes the diseased blood vessel.

[0034] Preferred, such as Figure 2 As shown, the radiofrequency tube 1 includes a tube body 11 and a head section 12, with the head section 12 disposed on the tube body 11. The head section 12 is conical and has a guide surface with a smoothly transitioning arc curve, which serves as a guide and prevents the head section 12 from being sharp and puncturing blood vessels. The head section 12 is used to guide the body 11 through the blood vessel.

[0035] Preferably, the control unit 3 includes a resistance measuring module, which includes a first electrode 31, a second electrode 32, and a resistance calculator (not shown in the figure). Both the first electrode 31 and the second electrode 32 are disposed on the end face of the head segment 12, and both are connected to the resistance calculator, which is mounted on the control unit 3. The resistance measuring module measures the resistance of the patient's blood or tissue and sends the data to the control unit 3. When the head segment 12 is in the blood, the resistance measuring module measures the resistance value of the blood. If the head segment 12 punctures the blood vessel wall, the resistance measuring module measures the resistance value of the blood vessel wall and sends the resistance value to the control unit 3 in real time. The control unit 3 can determine whether the blood vessel has been punctured and alert medical personnel or issue a command to the drive unit 2 to stop the advance of the radiofrequency tube 1 or retract the radiofrequency tube 1.

[0036] The resistivity of human blood is around 1.5 Ω·m. However, the resistance of blood vessels is much higher than that of blood; the resistivity of the vessel wall can reach over 100 Ω·m. If we simply compare these two figures, assuming a blood vessel and its blood have the same length and cross-sectional area, according to the resistance formula R = ρSl (where R is resistance, ρ is resistivity, l is length, and S is cross-sectional area), considering only resistivity, the resistance of blood vessels is tens of times, or even higher, than the resistance of blood. The difference between the blood resistance and blood vessel resistance obtained by the resistance measurement module is significant.

[0037] Preferably, an insulating layer is provided between the first electrode sheet 31, the second electrode sheet 32 ​​and the head segment 12 to prevent the first electrode sheet 31 and the second electrode sheet 32 ​​from short-circuiting.

[0038] Preferably, the real-time operating frequency of the resistance measurement module is 1Hz-10Hz.

[0039] Preferably, the radiofrequency tube 1 further includes a radiofrequency block 13, which is disposed on the tube body 11 and connected to the control unit 3. The radiofrequency block 13 is used to generate high-frequency alternating current and heat, and to close the diseased blood vessel via radiofrequency.

[0040] Preferably, there are multiple radiofrequency blocks 13, and the multiple radiofrequency blocks 13 are arranged continuously along the tube body 11. The control unit 3 can heat each radiofrequency block 13 individually, and medical staff can control the length of the ablation area. A single radiofrequency tube 1 including multiple radiofrequency blocks 13 can be used for lesion areas of different lengths, reducing the frequency of changing the radiofrequency tube 1 or eliminating the need to change the radiofrequency tube, shortening the operation time, and improving the efficiency of the operation.

[0041] Preferred, such as Figure 3 As shown, the driving unit 2 includes a housing 21, a main driving component, and an auxiliary driving component, both of which are mounted on the housing 21. The radiofrequency tube 1 can pass through the housing 21 and is driven by the main driving component and the auxiliary driving component to puncture the blood vessel.

[0042] Preferably, the main drive assembly includes a drive wheel 22, a drive motor 23, a drive gear 24, and a driven gear 25. The drive wheel 22 is rotatably connected to the inner wall of the housing 21 via a rotating shaft. The driven gear 25 is fixedly connected to the drive wheel 22 and coaxial with it. The drive motor 23 is fixedly connected to the inner wall of the housing 21. The drive gear 24 is mounted on the output shaft of the drive motor 23 and meshes with the driven gear 25. The RF tube 1 is clamped between the drive wheel 22 and the auxiliary drive assembly. The drive wheel 22 drives the RF tube 1. The drive motor 23 is connected to the control unit 3, which controls the rotation of the drive motor 23, thereby transmitting power to the driven gear 25 and the drive wheel 22 via the drive gear 24. The rotation of the drive wheel 22 drives the RF tube 1 to slide along the housing 21. Since the drive unit 2 can use electricity to drive the radiofrequency tube 1, it saves the physical strength of medical staff, and medical staff can concentrate more attention on avoiding the bends of the ablation catheter in the vein, thus improving the efficiency of the operation.

[0043] Preferably, both the driving gear 24 and the driven gear 25 are bevel gears, and the output shaft of the drive motor 23 can be perpendicular to the rotation axis of the drive wheel 22, thereby saving space occupied by the housing 21.

[0044] Preferably, the control unit 3 needs to preload the patient's blood resistance and blood vessel wall resistance data and compare them with the measured data of the resistance measuring module in real time. During the puncture stage, the control unit 3 controls the drive motor 23 to rotate forward, driving the radiofrequency tube 1 to puncture the blood vessel towards the lesion. At this time, the tip 12 is in the patient's blood. The resistance measuring module measures the blood resistance value and sends it to the controller 3. If the tip 12 punctures the blood vessel, the resistance measuring module measures the blood vessel resistance value. Based on the comparison result, the control unit 3 determines that the blood vessel has been punctured and sends a command to the drive motor 23. The drive motor 23 reverses, and the radiofrequency tube 1 retracts towards the drive unit 2 to prevent the radiofrequency tube 1 from puncturing the blood vessel and avoid harming the patient's health.

[0045] Preferred, such as Figure 4 As shown, to enable the drive wheel 22 to adapt to various RF tubes 1 of different diameters, the drive wheel 22 includes a wheel body 221, a first annular groove 222, and a second annular groove 223. The wheel body 221 includes a rolling surface, the first annular groove 222 is formed on the rolling surface, and the second annular groove 223 is formed on the first annular groove 222. The rolling surface, the first annular groove 222, and the second annular groove 223 are concentric. The first annular groove 222 and the second annular groove 223 can increase the contact area between the rolling surface and the outer wall of the RF tube 1, thereby increasing the friction of the drive wheel 22. The first annular groove 222 is used to adapt to RF tubes 1 with large outer diameters, and the second annular groove 223 is used to adapt to RF tubes 1 with small outer diameters, so that the drive wheel 22 can adapt to various RF tubes 1 of different diameters.

[0046] Preferably, in order to ensure the driving force of the drive wheel 22 on the RF tube 1, an anti-slip layer is provided on the rolling surface to increase the friction of the drive wheel 22 and prevent the drive wheel 22 from slipping relative to the outer wall of the RF tube 1.

[0047] Preferably, in order to simultaneously increase the friction of the drive wheel 22 and protect the outer wall of the radio frequency tube 1, the anti-slip layer is a rubber layer.

[0048] Preferred, such as Figure 3 As shown, the auxiliary drive assembly includes a driven wheel 26 and a wheel frame 27. The wheel frame 27 is connected to the housing 21, and the driven wheel 26 is rotatably connected to the wheel frame 27. The RF tube 1 is clamped between the drive wheel 22 and the driven wheel 26. The RF tube 1 rolls on the driven wheel 26, reducing wear on the outer wall of the RF tube 1.

[0049] Preferably, the driven wheel 26 has the same structure as the driving wheel 22. The driven wheel 26 includes a wheel body 221, a first annular groove 222, and a second annular groove 223.

[0050] In some optional embodiments, the RF tube 1 can be of various diameters. In order to adapt the drive unit 2 to various RF tubes 1 of different diameters, the auxiliary drive assembly also includes a fixing block 28 and a positioning rod 29. The fixing block 28 is disposed on the inner wall of the housing 21 and has a positioning rod hole. One end of the positioning rod 29 is fixedly connected to the wheel frame 27, and the other end of the positioning rod 29 is a free end. The free end of the positioning rod 29 can pass through the positioning rod hole of the fixing block 28. The wheel frame 27 and the positioning rod 29 can slide along the positioning rod hole, thereby adjusting the distance between the driven wheel 26 and the drive wheel 22. The drive wheel 22 and the driven wheel 26 can clamp RF tubes 1 of different diameters.

[0051] Preferably, in order to prevent the wheel frame 27 from rotating around the positioning rod 29, thereby causing the driven wheel 26 to deflect and hindering the drive unit 2 from driving the RF tube 1, the positioning rod 29 is a multi-faceted rod, and the outer surface of the positioning rod 29 is the same as the inner surface of the positioning rod hole, ensuring that the positioning rod 29 does not rotate circumferentially when passing through the positioning rod hole, thereby preventing the wheel frame 27 from rotating around the positioning rod 29, avoiding the deflection of the driven wheel 26, and ensuring the normal drive of the RF tube 1 by the drive unit 2.

[0052] Preferably, in order to enable the drive unit 2 to adapt to various radio frequency tubes 1 of different diameters, the auxiliary drive assembly also includes a positioning spring 30. The positioning spring 30 is sleeved on the positioning rod 29. One end of the positioning spring 30 is connected to the wheel frame 27, and the other end of the positioning spring 30 is connected to the fixing block 28. The positioning spring 30 is used to push the wheel frame 27 and the driven wheel 26 towards the drive wheel 22. The driven wheel 26 can push various radio frequency tubes 1 of different thicknesses toward the drive wheel 22, ensuring that the drive wheel 22 and the driven wheel 26 can firmly clamp radio frequency tubes 1 of different diameters.

[0053] Preferred, such as Figure 1 and Figure 3 As shown, the control unit 3 also includes a display module 33 and a power module 34. Both the display module 33 and the power module 34 are mounted on the housing 21. The display module 33 is used to display information such as the movement direction and speed of the radio frequency tube 1, and the power module 34 is used to supply power to the closing device of this embodiment.

[0054] Preferably, the power module 34 includes a battery. In this embodiment, the closing device does not need to be plugged into the power grid, and can be reliably powered by the battery and operate independently.

[0055] Preferably, the control unit 3 further includes a speed adjustment handwheel 35, which is mounted on the housing 21. The speed adjustment handwheel 35 is used to adjust the rotational speed of the drive motor 23, thereby changing the rotational speed of the drive wheel 22, and ultimately adjusting the movement speed of the RF tube 1.

[0056] Compared to existing technologies, in this embodiment, when the head segment 12 of the closure device is in the blood, the resistance measurement module measures the resistance value of the blood. If the head segment 12 pierces the blood vessel wall, the resistance measurement module measures the resistance value of the blood vessel wall and sends the resistance value to the control unit 3 in real time. Based on the comparison result, the control unit 3 determines that the blood vessel has been punctured and sends a command to the drive motor 23. The drive motor 23 reverses, and the radio frequency tube 1 retracts towards the drive unit 2 to prevent the radio frequency tube 1 from puncturing the blood vessel and avoid harming the patient's health. The control unit 3 can heat each radio frequency block 13 individually, and medical staff can control the length of the ablation area. A single radiofrequency tube 1, comprising multiple radiofrequency blocks 13, can be used for lesion areas of different lengths, reducing the frequency of radiofrequency tube replacement or eliminating the need for replacement, thus shortening surgical time and improving surgical efficiency. The drive unit 2 can use electricity to drive the movement of the radiofrequency tube 1, saving the physical strength of medical staff, and allowing them to focus more attention on avoiding the bends of the ablation catheter in the veins, thereby improving surgical efficiency. A positioning spring 30 is sleeved on the positioning rod 29, with one end connected to the wheel frame 27 and the other end connected to the fixing block 28. The positioning spring 30 is used to push the wheel frame 27 and the driven wheel 26 towards the drive wheel 22. The driven wheel 26 can push radiofrequency tubes 1 of various thicknesses toward the drive wheel 22, ensuring that both the drive wheel 22 and the driven wheel 26 can firmly clamp radiofrequency tubes 1 of different diameters.

[0057] Example 2:

[0058] When the radio frequency tube 1 retracts towards the drive unit 2, the patient's blood will adhere to the outer wall of the radio frequency tube 1. If the blood enters the housing 21 along with the radio frequency tube 1, it will damage the control unit 3. If the blood contaminates the rolling surface of the drive wheel 22, it will reduce the friction of the rolling surface, causing the drive wheel 22 to slip. Therefore, another specific embodiment of the closing device of the present invention is as follows: Figure 1 and Figure 5 As shown, based on Embodiment 1, a sheath unit 4, a snap-fit ​​unit 5, and a sealing unit 6 are added. The sheath unit 4 is used for percutaneous insertion into a vein to provide a channel for the radiofrequency tube 1 to enter the vein. The snap-fit ​​unit 5 is used to connect the drive unit 2 and the sheath unit 4. The sealing unit 6 is used to seal between the radiofrequency tube 1 and the sheath unit 4 to prevent blood from entering the housing 21 along with the outer wall of the radiofrequency tube 1.

[0059] Preferably, the sheath unit 4 includes a sheath body 41 and a flange 42, the flange 42 being disposed on the outer wall of the end face of the sheath body 41. The sheath body 41 is used to insert into the patient's blood vessel.

[0060] Preferred, such as Figure 6As shown, the snap-fit ​​unit 5 includes a snap-fit ​​base 51, which is disposed on the side wall of the housing 21. The snap-fit ​​base 51 can be inserted into the sheath body 41, thereby connecting the drive unit 2 and the sheath unit 4. The snap-fit ​​base 51 is a cylinder or a cone, and the hollow part of the snap-fit ​​base 51 is used for the passage of the radio frequency tube 1.

[0061] Preferably, to secure the connection between the drive unit 2 and the sheath unit 4, the locking unit 5 further includes a first latch. The first latch includes a connecting plate 52 and a locking protrusion 53. The two ends of the connecting plate 52 are respectively connected to the side wall of the housing 21 and the locking protrusion 53. The locking protrusion 53 can connect with the flange 42 to prevent the sheath body 41 from disengaging from the locking seat 51. The connecting plate 52 is an elastic connecting plate. When the locking seat 51 is inserted into the sheath body 41, the locking protrusion 53 can connect with the flange 42, and the connecting plate 52 prevents the locking protrusion 53 from disengaging from the flange 42, ensuring a secure connection between the drive unit 2 and the sheath unit 4.

[0062] Preferably, in order to disengage the locking protrusion 53 from the flange 42, the first buckle also includes a pressure plate 54, which is connected to the locking protrusion 53. By moving the pressure plate 54 in the direction of contract 21, the locking protrusion 53 can disengage from the flange 42, and the drive unit 2 can disengage from the sheath unit 4.

[0063] Preferably, the locking unit 5 further includes a second latch, which has the same structure as the first latch. The second latch and the first latch are symmetrically arranged with the locking seat 51 as the center, further ensuring a stable connection between the drive unit 2 and the sheath unit 4.

[0064] Preferably, the sealing unit 6 includes a sealing airbag 61 and an inflation mechanism (not shown in the figure). The sealing airbag 61 is disposed on the snap-fit ​​seat 51, and the inflation mechanism is disposed on the housing 21. The inflation mechanism is connected to both the control unit 3 and the sealing airbag 61. The control unit 3 can control the inflation mechanism to inflate the sealing airbag 61. The inflated sealing airbag 61 is used to achieve a seal between the radio frequency tube 1 and the sheath unit 4.

[0065] When the radiofrequency tube 1 retracts towards the drive unit 2, the patient's blood will adhere to the outer wall of the radiofrequency tube 1. If the blood enters the housing 21 along with the radiofrequency tube 1, it will damage the control unit 3. If the blood contaminates the rolling surface of the drive wheel 22, it will reduce the friction of the rolling surface, causing the drive wheel 22 to slip. The inflated sealing airbag 61 can achieve a seal between the radiofrequency tube 1 and the sheath unit 4, preventing blood from entering the housing 21 along with the radiofrequency tube 1 and avoiding damage to the control unit 3; it can also prevent blood from contaminating the rolling surface of the drive wheel 22 and preventing the drive wheel 22 from slipping.

[0066] Compared to Embodiment 1, in this embodiment, the locking seat 51 can be inserted into the sheath body 41, thereby connecting the drive unit 2 and the sheath unit 4; when the locking seat 51 is inserted into the sheath body 41, the locking protrusion 53 can be connected to the flange 42, and the connecting plate 52 prevents the locking protrusion 53 from disengaging from the flange 42, ensuring a stable connection between the drive unit 2 and the sheath unit 4; the inflated sealing airbag 61 can achieve a seal between the radio frequency tube 1 and the sheath unit 4, preventing blood from entering the housing 21 with the radio frequency tube 1 and avoiding damage to the control unit 3; it can also prevent blood from contaminating the rolling surface of the drive wheel 22, avoiding slippage of the drive wheel 22.

[0067] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A radiofrequency closure device for veins, characterized in that, It includes a radiofrequency tube (1), a driving unit (2), a control unit (3), a sheath unit (4), a snap-fit ​​unit (5), and a sealing unit (6). The radiofrequency tube (1) and the control unit (3) are both connected to the driving unit (2). The driving unit (2) is used to deliver the radiofrequency tube (1) to the target area in the blood vessel. The radiofrequency tube (1) is used to ablate varicose veins. The radio frequency tube (1) includes a tube body (11) and a head section (12), the head section (12) being disposed on the tube body (11); the driving unit (2) includes a housing (21) and a main driving assembly, the main driving assembly being disposed on the housing (21); the radio frequency tube (1) can pass through the housing (21), be driven by the main driving assembly, and puncture blood vessels; The control unit (3) includes a resistance measurement module, which includes a first electrode (31), a second electrode (32) and a resistance calculator. The first electrode (31) and the second electrode (32) are both located on the end face of the head section (12), and the first electrode (31) and the second electrode (32) are both connected to the resistance calculator. The resistance measurement module is used to measure the resistance of the patient's blood or tissue and send it to the control unit (3). The control unit (3) can determine whether the blood vessel has been punctured and send a command to the drive unit (2) to stop the radiofrequency tube (1) from advancing or retracting the radiofrequency tube (1). The sealing unit (6) includes a sealing airbag (61) and an inflation mechanism. The sealing airbag (61) is mounted on the snap-fit ​​seat (51) of the snap-fit ​​unit (5), and the inflation mechanism is mounted on the housing (21). The inflation mechanism is connected to the control unit (3) and the sealing airbag (61) respectively. The control unit (3) can control the inflation mechanism to inflate the sealing airbag (61). The inflated sealing airbag (61) is used to achieve a seal between the radio frequency tube (1) and the sheath unit (4). When the radio frequency tube (1) retracts towards the drive unit (2), the sealing unit (6) is used to prevent blood from entering the housing (21) along with the outer wall of the radio frequency tube (1).

2. The radiofrequency closure device for veins according to claim 1, characterized in that, The head section (12) is a cone and has a guide surface.

3. The radiofrequency closure device for veins according to claim 1, characterized in that, The radio frequency tube (1) also includes a radio frequency block (13), which is disposed on the tube body (11) and connected to the control unit (3).

4. The radiofrequency closure device for veins according to claim 1, characterized in that, The drive unit (2) also includes an auxiliary drive component, which is disposed on the housing (21).

5. The radiofrequency closure device for veins according to claim 4, characterized in that, The main drive assembly includes a drive wheel (22) and a drive motor (23). The drive wheel (22) is rotatably connected to the inner wall of the box (21) via a rotating shaft, and the drive motor (23) is fixedly connected to the inner wall of the box (21).

6. The radiofrequency closure device for veins according to claim 5, characterized in that, The rolling surface of the drive wheel (22) is provided with an anti-slip layer to increase the friction of the drive wheel (22).

7. The radiofrequency closure device for veins according to claim 6, characterized in that, The anti-slip layer is a rubber layer.

8. The radiofrequency closure device for veins according to claim 4, characterized in that, The control unit (3) includes a display module (33) and a power module (34), both of which are mounted on the housing (21).

9. The radiofrequency closure device for veins according to claim 5, characterized in that, The control unit (3) also includes a speed adjustment handwheel (35), which is mounted on the housing (21) and is used to adjust the speed of the drive motor (23).

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