An ablation tube for diseased veins

Abstract

The utility model relates to an ablation tube for pathological vein, belong to medical instrument technical field, solved the problem that medical staff in the ablation technique in the prior art cannot perceive whether the ablation catheter work section reaches the ablation target effectively and whether the blood vessel wall is punctured or not. The utility model discloses a cylinder section, the leading section, impedance detection module and control unit, and the leading section is arranged on the cylinder section, and the leading section is used for guiding the cylinder section to pass through the blood vessel, and the control unit is connected with the cylinder section;Impedance detection module is used for measuring the resistance of patient's blood or tissue, and sends to the control unit. If the leading section of the utility model is stuck into the blood vessel wall or the work section has reached the ablation target, the impedance detection module measures the resistance value of the blood vessel wall and sends to the control unit, and the control unit can judge whether the blood vessel is broken according to the change of resistance value, and prompts medical staff, and the leading section is still stuck into the blood vessel wall or the work section has reached the ablation target in the blood vessel.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an ablation tube for diseased 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 high-frequency alternating current in the catheter's working area is then used to ablate the lesions.

[0004] During the insertion of the ablation catheter into the lesion area within a vein, the catheter needs to pass through the bends in the vein. Because this is a manual procedure, medical staff cannot quickly determine whether the ablation catheter has punctured the vessel wall. If the ablation catheter punctures the vessel wall during the procedure, it can harm the patient's health. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides an ablation catheter for diseased veins, which solves the problem that medical staff cannot quickly detect whether the ablation catheter has punctured the blood vessel wall during ablation procedures.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows:

[0007] This invention provides an ablation tube for a diseased vein, comprising a cylindrical section, a guide section, an impedance detection module, and a control unit. The guide section is disposed on the cylindrical section and is used to guide the cylindrical section through the blood vessel. The control unit is connected to the cylindrical section. The impedance detection module is used to measure the resistance of the patient's blood or tissue and send the data to the control unit.

[0008] The impedance detection module includes a first terminal, a second terminal, and a resistance calculator. The first terminal and the second terminal are both disposed on the end face of the leading section, and both the first terminal and the second terminal are connected to the resistance calculator, which is disposed on the control unit.

[0009] When the lead segment is in the blood, the impedance detection module measures the resistance value of the blood; when the lead segment pierces the blood vessel wall, the impedance detection 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 can determine whether the blood vessel has been punctured based on the change in resistance value and alert medical staff whether the lead segment is in the blood vessel or has pierced the blood vessel wall.

[0010] Furthermore, the cylindrical section also includes a heating element, which is disposed on the cylindrical section and connected to the control unit; the heating element is used to generate heat to ablate varicose veins.

[0011] Furthermore, there are multiple heating elements, and the multiple heating elements are arranged continuously along the cylindrical section. The control unit can heat each heating element individually to control the length of the ablation zone.

[0012] Furthermore, it also includes a housing, a main drive assembly, and a passive rotating wheel, both of which are disposed on the housing, and the passive rotating wheel is rotatably connected to the housing; the cylindrical section can pass through the housing and is driven by the main drive assembly to puncture blood vessels.

[0013] Furthermore, the main drive assembly includes a drive wheel and a motor. The drive wheel is rotatably connected to the inner wall of the housing via a rotating shaft. The motor is mounted on the inner wall of the housing and is connected to the control unit. The drive wheel is used to drive the cylindrical section.

[0014] Furthermore, it also includes a first gear and a second gear, the second gear being fixedly connected to the drive wheel, the first gear being disposed on the output shaft of the motor, the first gear meshing with the second gear, and the control unit being able to control the rotation of the motor, thereby transmitting power to the second gear and the drive wheel through the first gear.

[0015] Furthermore, both the first gear and the second gear are bevel gears, and the output shaft of the motor can be perpendicular to the rotation axis of the drive wheel, thereby saving space occupied by the housing.

[0016] Furthermore, an anti-slip layer is provided on the rolling surface of the active rotor to increase the friction of the active rotor and prevent the active rotor from slipping relative to the outer wall of the cylindrical section.

[0017] Furthermore, the anti-slip layer is a rubber layer.

[0018] Furthermore, an insulating layer is provided between the first pole, the second pole, and the leading section to prevent short circuit between the first pole and the second pole.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] (1) The impedance detection module of this utility model is used to measure the resistance of the patient's blood or tissue and send it to the control unit; when the lead segment is in the blood, the impedance detection module measures the resistance value of the blood; if the lead segment is embedded in the blood vessel wall, the impedance detection 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 can determine whether the blood vessel has been punctured based on the change in resistance value and remind medical staff whether the lead segment is in the blood vessel or has been embedded in the blood vessel wall.

[0021] (2) The multiple heating elements of this utility model are arranged continuously along the cylindrical section; the control unit can heat each heating element individually, and medical staff can control the length of the ablation area; a cylindrical section including multiple heating elements can be used for lesion areas of different lengths, reducing the frequency of changing the ablation tube or not changing the ablation tube, shortening the operation time, and improving the operation efficiency.

[0022] (3) The delivery unit of this utility model can use electricity to drive the cylindrical section 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.

[0023] (4) When the lead section of this utility model is in the blood, the impedance detection module measures the resistance value of the blood and sends it to the controller; the control unit controls the motor to rotate forward and drives the cylindrical section to puncture the blood vessel in the direction of the vascular lesion; if the lead section punctures the blood vessel, the impedance detection module measures the resistance value of the blood vessel, and the control unit determines that the blood vessel has been punctured based on the comparison result, sends a command to the motor, the motor reverses, and the cylindrical section retracts in the direction of the delivery unit to prevent the cylindrical section from puncturing the blood vessel and avoid harming the patient's health.

[0024] 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 will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the ablation tube;

[0026] Figure 2 This is a schematic diagram of the overall structure of the conveying unit.

[0027] Figure label:

[0028] 1-Cylindrical section; 2-Leading section; 3-First pole post; 4-Second pole post; 5-Heating element; 6-Outer shell; 7-Passive rotating wheel; 8-Driving rotating wheel; 9-Motor; 10-First gear; 11-Second gear. Detailed Implementation

[0029] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All inventions utilizing the concept of this utility model are protected.

[0030] Example 1:

[0031] An ablation catheter for use in diseased veins (hereinafter referred to as ablation catheter), such as Figure 1 As shown, the device includes a cylindrical section 1, a guide section 2, and a control unit (not shown in the figure). The guide section 2 is disposed on the cylindrical section 1. The guide section 2 is conical and has a guide surface with a smoothly transitioned arc curve, which serves as a guide and prevents the guide section 2 from being sharp and puncturing blood vessels. The guide section 2 is used to guide the cylindrical section 1 through the blood vessel.

[0032] Preferably, the ablation tube in this embodiment further includes an impedance detection module. The impedance detection module includes a first electrode 3, a second electrode 4, and a resistance calculator (not shown in the figure). Both the first electrode 3 and the second electrode 4 are disposed on the end face of the leading segment 2, and both are connected to the resistance calculator, which is mounted on the control unit. The impedance detection module measures the resistance of the patient's blood or tissue and sends the data to the control unit. When the leading segment 2 is in the blood, the impedance detection module measures the resistance value of the blood. If the leading segment 2 punctures the blood vessel wall, the impedance detection 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 can determine whether the blood vessel has been punctured based on the change in resistance value and alert medical personnel whether the leading segment 2 of the ablation tube in this embodiment is in the blood vessel or has punctured the blood vessel wall.

[0033] The resistivity of human blood is generally 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 the resistivity factor, 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 impedance detection module is significant.

[0034] Preferably, an insulating layer is provided between the first pole 3, the second pole 4 and the leading section 2 to prevent short circuit between the first pole 3 and the second pole 4.

[0035] Preferably, the impedance detection module operates at a real-time frequency of 1Hz-10Hz.

[0036] Preferably, the cylindrical section 1 further includes a heating element 5, which is disposed on the cylindrical section 1 and connected to the control unit. The heating element 5 uses high-frequency alternating current and heat to radiofrequency close the diseased blood vessel.

[0037] Preferably, there are multiple heating elements 5, and the multiple heating elements 5 are arranged continuously along the cylindrical section 1. The control unit can heat each heating element 5 individually, and medical staff can control the length of the ablation area. A cylindrical section 1 including multiple heating elements 5 can be used for lesion areas of different lengths, reducing the frequency of changing the ablation tube or eliminating the need to change the ablation tube, shortening the operation time, and improving the efficiency of the operation.

[0038] Preferably, the length of the heating element 5 is 1-3cm, and more preferably, the length of the heating element 5 is 1cm, 2cm or 3cm.

[0039] In existing technologies, the impedance detection module measures the resistance of the patient's blood or tissue and sends the data to the control unit. When the lead segment 2 is in the blood, the impedance detection module measures the resistance of the blood. If the lead segment 2 pierces the blood vessel wall, the impedance detection module measures the resistance of the blood vessel wall and sends the resistance value to the control unit in real time. The control unit can determine whether the blood vessel has been punctured based on the change in resistance value and alert medical personnel whether the lead segment 2 of the ablation tube in this embodiment is in the blood vessel or has pierced the blood vessel wall. Multiple heating elements 5 are continuously arranged along the cylindrical section 1. The control unit can heat each heating element 5 individually, and medical personnel can control the length of the ablation area. A single cylindrical section 1 including multiple heating elements 5 can be used for lesion areas of different lengths, reducing the frequency of changing the ablation tube or eliminating the need to change the ablation tube, shortening the operation time, and improving the efficiency of the operation.

[0040] Example 2:

[0041] Another specific embodiment of this utility model. In order to enable the ablation tube to be electrically driven through blood vessels and to automatically stop when the ablation tube penetrates the vessel wall, as follows... Figure 1 and Figure 2 As shown, a delivery unit is added based on Embodiment 1. The delivery unit is used to drive the ablation tube through the blood vessel and to automatically stop or withdraw the ablation tube from the blood vessel wall when it is inserted into the blood vessel wall.

[0042] Preferred, such as Figure 2As shown, the delivery unit includes a housing 6, a main drive assembly, and a passive rotating wheel 7. Both the main drive assembly and the passive rotating wheel 7 are mounted on the housing 6, and the passive rotating wheel 7 is rotatably connected to the housing 6. The cylindrical section 1 can pass through the housing 6 and is driven by the main drive assembly and the passive rotating wheel 7 to puncture the blood vessel.

[0043] Preferably, the main drive assembly includes an active rotating wheel 8, a motor 9, a first gear 10, and a second gear 11. The active rotating wheel 8 is rotatably connected to the inner wall of the housing 6 via a rotating shaft. The second gear 11 is fixedly connected to the active rotating wheel 8 and is coaxial with it. The motor 9 is fixedly connected to the inner wall of the housing 6. The first gear 10 is mounted on the output shaft of the motor 9 and meshes with the second gear 11. The cylindrical section 1 is held between the active rotating wheel 8 and the passive rotating wheel 7. The active rotating wheel 8 drives the cylindrical section 1. The motor 9 is connected to a control unit, which controls the rotation of the motor 9, thereby transmitting power to the second gear 11 and the active rotating wheel 8 through the first gear 10. The rotation of the active rotating wheel 8 drives the cylindrical section 1 to slide along the housing 6. Because the delivery unit can use electricity to drive the movement of the cylindrical section 1, it saves the physical strength of medical staff, and allows them to focus more attention on guiding the ablation catheter away from the bends in the vein, improving surgical efficiency.

[0044] Preferably, the first gear 10 and the second gear 11 are both bevel gears, and the output shaft of the motor 9 can be perpendicular to the rotation axis of the drive wheel 8, thereby saving space occupied by the housing 6.

[0045] Preferably, the control unit needs to preload the patient's blood resistance and blood vessel wall resistance data and compare them with the measured data of the impedance detection module in real time. During the puncture stage, the control unit controls the motor 9 to rotate forward, driving the cylindrical section 1 to puncture the blood vessel towards the lesion. At this time, the leading section 2 is in the patient's blood, and the impedance detection module measures the resistance value of the blood and sends it to the controller 3. If the leading section 2 punctures the blood vessel, the impedance detection module measures the resistance value of the blood vessel. Based on the comparison result, the control unit determines that the blood vessel has been punctured, sends a command to the motor 9, the motor 9 reverses, and the cylindrical section 1 retracts towards the delivery unit to prevent the cylindrical section 1 from puncturing the blood vessel and avoid harming the patient's health.

[0046] Preferably, in order to ensure the driving force of the drive wheel 8 on the cylindrical section 1, an anti-slip layer is provided on the rolling surface of the drive wheel 8 to increase the friction of the drive wheel 8 and prevent the drive wheel 8 from slipping relative to the outer wall of the cylindrical section 1.

[0047] Preferably, in order to simultaneously increase the friction of the active rotating wheel 8 and protect the outer wall of the cylindrical section 1, the anti-slip layer is a rubber layer.

[0048] The cylindrical section 1 is held between the driving wheel 8 and the driven wheel 7. The cylindrical section 1 rolls on the driven wheel 7, reducing the wear on the outer wall of the cylindrical section 1.

[0049] Preferably, the passive rotor 7 has the same structure as the active rotor 8.

[0050] Compared to Example 1, during the puncture stage, the control unit of the ablation tube in this example controls the motor 9 to rotate forward, driving the cylindrical section 1 to puncture the blood vessel towards the lesion. At this time, the leading section 2 is in the patient's blood, and the impedance detection module measures the resistance value of the blood and sends it to the controller 3. If the leading section 2 punctures the blood vessel, the impedance detection module measures the resistance value of the blood vessel. Based on the comparison result, the control unit determines that the blood vessel has been punctured and sends a command to the motor 9. The motor 9 reverses, and the cylindrical section 1 retracts towards the delivery unit to prevent the cylindrical section 1 from puncturing the blood vessel and avoid harming the patient's health. The delivery unit can use electricity to drive the movement of the cylindrical section 1, saving the physical strength of medical staff. Furthermore, medical staff can concentrate more attention on avoiding the bends of the vein with the ablation catheter, thus improving surgical efficiency.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ablation tube for diseased veins, characterized in that, It includes a cylindrical section (1), a guide section (2), an impedance detection module, and a control unit. The guide section (2) is disposed on the cylindrical section (1) and is used to guide the cylindrical section (1) through the blood vessel. The control unit is connected to the cylindrical section (1). The impedance detection module is used to measure the resistance of the patient's blood or tissue and send the data to the control unit. The impedance detection module includes a first pole (3), a second pole (4), and a resistance calculator. The first pole (3) and the second pole (4) are both disposed on the end face of the leading section (2), and the first pole (3) and the second pole (4) are both connected to the resistance calculator. The resistance calculator is disposed on the control unit. When the lead segment (2) is in the blood, the impedance detection module measures the resistance value of the blood; when the lead segment (2) is embedded in the blood vessel wall, the impedance detection 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 can determine whether the blood vessel has been punctured based on the change in resistance value and prompt medical staff whether the lead segment (2) is in the blood vessel or has been embedded in the blood vessel wall.

2. The ablation tube for diseased veins according to claim 1, characterized in that, The cylindrical section (1) further includes a heating element (5), which is disposed on the cylindrical section (1) and connected to the control unit; the heating element (5) is used to generate heat to ablate varicose veins.

3. The ablation tube for diseased veins according to claim 2, characterized in that, There are multiple heating elements (5), and the multiple heating elements (5) are arranged continuously along the cylindrical section (1). The control unit can heat each heating element (5) individually to control the length of the ablation zone.

4. The ablation tube for diseased veins according to claim 1, characterized in that, It also includes a housing (6), a main drive assembly and a passive rotating wheel (7), both of which are mounted on the housing (6), and the passive rotating wheel (7) is rotatably connected to the housing (6); the cylindrical section (1) can pass through the housing (6) and is driven by the main drive assembly to puncture blood vessels.

5. The ablation tube for diseased veins according to claim 4, characterized in that, The main drive assembly includes an active rotating wheel (8) and a motor (9). The active rotating wheel (8) is rotatably connected to the inner wall of the outer shell (6) via a rotating shaft. The motor (9) is disposed on the inner wall of the outer shell (6) and is connected to the control unit. The active rotating wheel (8) is used to drive the cylindrical section (1).

6. The ablation tube for diseased veins according to claim 5, characterized in that, It also includes a first gear (10) and a second gear (11). The second gear (11) is fixedly connected to the drive wheel (8). The first gear (10) is disposed on the output shaft of the motor (9). The first gear (10) meshes with the second gear (11). The control unit can control the motor (9) to rotate, thereby transmitting power to the second gear (11) and the drive wheel (8) through the first gear (10).

7. The ablation tube for diseased veins according to claim 6, characterized in that, Both the first gear (10) and the second gear (11) are bevel gears, and the output shaft of the motor (9) is perpendicular to the rotation axis of the drive wheel (8).

8. The ablation tube for diseased veins according to claim 5, characterized in that, The rolling surface of the active rotating wheel (8) is provided with an anti-slip layer.

9. The ablation tube for diseased veins according to claim 8, characterized in that, The anti-slip layer is a rubber layer.

10. The ablation tube for diseased veins according to claim 1, characterized in that, An insulating layer is provided between the first pole post (3), the second pole post (4), and the leading section (2).

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