Conical balloon pulse ablation catheter
By adopting a conical balloon structure and a double-layer balloon structure on the pulse ablation catheter, the problem that existing catheters are difficult to accurately locate and adapt to pulmonary veins of different diameters is solved, and precise ablation and efficient isolation are achieved.
Patent Information
- Application Number
- CN202510418010.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-06-13
AI Technical Summary
Existing annular catheters or mesh basket catheters are difficult to accurately locate the pulmonary veins and adapt to pulmonary veins of different diameters, making it difficult to quickly complete all pulmonary veins isolation ablation.
The pulse ablation catheter with a conical balloon structure is adopted to achieve precise ablation of the pulmonary vestibule and adaptation of pulmonary veins of different diameters through the double-layer balloon structure and multiple ablation electrodes.
Accurate ablation of the pulmonary veins veins, adapting to pulmonary veins of different diameters, improving the safety and efficiency of the surgery, and extending the service life of the catheter.
Smart Images
Figure CN120131179A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and more particularly to a conical balloon pulsed ablation catheter. Background Art
[0002] The pulmonary veins are large veins that connect the lungs to the left atrium, with two on each side, namely the left superior pulmonary vein, the left inferior pulmonary vein, the right superior pulmonary vein, and the right inferior pulmonary vein. They transport the blood that has discharged carbon dioxide through the lungs and is rich in oxygen to the left atrium. Different from the veins of the systemic circulation, the pulmonary veins are the blood vessels that transport arterial blood from the lungs to the left atrium, so they are the functional blood vessels of the lungs. Different from the veins of the systemic circulation, the pulmonary veins have no valves. Their tributaries originate from the capillary network around the alveolar walls, converge step by step, and finally converge into two left and right pulmonary veins each. After exiting the hilum of the lung, they run inward through the fibrous pericardium and inject into the posterior upper part of the left atrium respectively. The right pulmonary vein is longer and runs behind the superior vena cava and the upper part of the right atrium. The left pulmonary vein is shorter and runs in front of the thoracic aorta. The normal pulmonary vein wall has no muscle bundles. When the muscle bundles of the left atrium connected to the pulmonary vein insert into the pulmonary vein, it can cause local myocardial arrangement disorder in the pulmonary vein vestibule, generate micro-reentry or slow conduction, and lead to the occurrence of atrial fibrillation. Therefore, the four pulmonary veins are the source sites of atrial fibrillation trigger foci and maintenance foci. Catheter ablation to isolate the four pulmonary veins or the pulmonary vein vestibule is the main surgical method for treating atrial fibrillation, which can cure or reduce the occurrence of atrial fibrillation and improve the prognosis of patients. This operation is monitored by an X-ray machine. Through puncturing blood vessels, the electrode catheter is inserted into the heart. First, the anatomical position of the pulmonary veins is checked and determined, and then high-frequency current or cryoenergy is locally released in the pulmonary vein vestibule to cause damage to the abnormal myocardial tissue, eliminate the trigger foci and maintenance foci, so as to achieve the treatment purpose. Since the damage caused by the current to the local myocardium is very limited, about in the range of three to four millimeters in diameter and depth, it will not affect the surrounding normal myocardial tissue. Therefore, patients generally have no obvious discomfort during the operation, and the operation is mostly completed in about one hour. Patients can generally be discharged in one to two days.
[0003] The pulsed ablation catheter can perform rapid circumferential ablation of the pulmonary vein vestibule to achieve pulmonary vein isolation. However, the diameters of the pulmonary veins are different and the vestibular structure is complex. The current circumferential catheters or basket catheters are difficult to accurately locate the pulmonary vein vestibule and adapt to pulmonary veins of different diameters. Moreover, it is difficult to quickly complete the isolation ablation of all pulmonary veins due to catheter deformation and poor supporting force. Summary of the Invention
[0004] In view of this, the present invention provides a conical balloon pulsed ablation catheter, and the purpose is to solve the problems existing in the prior art.
[0005] To solve the above technical problems, the present invention has taken the following technical solutions:
[0006] A conical balloon pulsed ablation catheter, comprising: a double-layer balloon structure, an ablation catheter body and a holding handle connected in sequence; the double-layer balloon structure includes an outer balloon and an inner balloon sleeved inside the outer balloon; a plurality of ablation electrodes are arranged on the outer surface of the outer balloon; a control cavity and a perfusion lumen are arranged inside the ablation catheter body; a control wire is arranged in the control cavity; a cavity is arranged in the middle of the inner balloon; the control wire passes through the cavity and is connected to the ablation electrode; a perfusion tube body is arranged inside the perfusion lumen; one end of the perfusion tube body is communicated with the inner balloon.
[0007] Preferably, a guiding cavity is arranged inside the ablation catheter body; a guiding wire is arranged inside the guiding cavity; one end of the guiding wire passes through the cavity and extends outside the outer balloon; the other end of the guiding wire passes through the holding handle and extends outside the holding handle.
[0008] Preferably, the number of the ablation electrodes is thirty-six; the thirty-six ablation electrodes are arranged in a six-row by six-column manner.
[0009] Preferably, two symmetrically arranged operation cavities are arranged inside the ablation catheter body; operation wires for bending the ablation catheter body are arranged in the operation cavities; a control handle for controlling the operation wires is arranged on the holding handle.
[0010] Preferably, a connecting component is arranged between the ablation catheter body and the holding handle; the connecting component includes a first connecting column, a threaded connecting column, a first protective housing and a second connecting column; the first connecting column is fixedly connected to one end of the ablation catheter body close to the holding handle; the threaded connecting column is fixedly connected to one end of the first connecting column away from the ablation catheter body; the first protective housing is threadedly connected to the outside of the threaded connecting column; the second connecting column is fixedly connected to one end of the threaded connecting column close to the holding handle; the other end of the second connecting column is fixedly connected to one end of the holding handle close to the ablation catheter body; one end of the perfusion tube body away from the double-layer balloon structure extends into the first protective housing and is provided with a connecting head.
[0011] Preferably, the number of the ablation catheter bodies is two; the two ablation catheter bodies are symmetrically arranged.
[0012] Preferably, a connecting pipeline and an ablation device are further included; one end of the connecting pipeline is connected to the holding handle; the other end of the connecting pipeline is connected to the ablation device.
[0013] Preferably, a protective component is provided at the connection between the connecting pipeline and the holding handle; the protective component includes a fixed threaded post, a limiting block, a second protective housing, and protective balls; one end of the fixed threaded post is fixedly connected to the outer side surface of the holding handle; the limiting block is fixedly connected to the other end of the fixed threaded post; the second protective housing is threadedly connected to the outside of the limiting block; a support hole is provided on the side of the second protective housing away from the holding handle; the connecting pipeline passes through the support hole; a plurality of the protective balls are rotatably connected to the inner surface of the support hole; the plurality of protective balls are distributed in an annular array.
[0014] Preferably, an anti-slip sleeve is sleeved on the outer side of the holding handle.
[0015] Preferably, both the outer balloon and the inner balloon are made of elastic materials.
[0016] The present invention has achieved the following technical effects compared with the prior art:
[0017] 1) By providing a conical balloon structure at the front end of the ablation catheter, the invention can directly enter the four pulmonary veins, perform pulmonary vein vestibule modeling mapping through surface electrodes, detect pulmonary vein potentials, clarify the structure of the pulmonary vein vestibule and the position of muscle bundles, thereby achieving precise ablation, and simultaneously monitoring in real time whether the pulmonary vein potentials disappear. At the same time, the diameter of the balloon is adjustable to adapt to pulmonary veins of different diameters, and the balloon structure is not easily deformed, which will not affect the catheter discharge effect, and can increase the contact area between the ablation catheter and the heart, avoid heart perforation caused by high tension, improve the surgical safety and reduce the surgical difficulty;
[0018] 2) By providing an inner and outer double-layer balloon structure, the invention can prevent the medium filled into the inner part of the double-layer balloon structure from contacting the electrical components on the inner surface of the outer balloon, thereby prolonging the service life of the ablation catheter;
[0019] 3) By providing a guide wire, the invention can play a guiding and supporting role for the ablation catheter. Description of the Drawings
[0020] Figure 1 is the front view of a conical balloon pulsed ablation catheter of the present invention;
[0021] Figure 2 is the cross-sectional view of a conical balloon pulsed ablation catheter of the present invention;
[0022] Figure 3 is Figure 2 the partial enlarged view of part A in
[0023] Figure 4 is Figure 2 the partial enlarged view of part B in
[0024] Figure 5 is Figure 2 a partial enlarged view of part C in;
[0025] Figure 6 is an isometric view of the connecting component;
[0026] Figure 7 is a sectional view of the connecting component;
[0027] Figure 8 is a schematic diagram of the double-layer balloon structure;
[0028] In the figure: 1. Ablation catheter body; 2. Grasping handle; 3. Outer balloon; 4. Inner balloon; 5. Ablation electrode; 6. Control cavity; 7. Perfusion lumen; 8. Control wire; 9. Cavity; 10. Perfusion tube body; 11. Guide cavity; 12. Guide wire; 13. Operation cavity; 14. Operation wire; 15. Control handle; 16. First connecting column; 17. Threaded connecting column; 18. First protective housing; 19. Second connecting column; 20. Connecting pipeline; 21. Ablation device; 22. Fixed threaded column; 23. Limiting block; 24. Second protective housing; 25. Protective ball; 26. Anti-slip sleeve. Detailed implementation manners
[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0030] Embodiment
[0031] Referring to Figure 1-8 as shown, the present invention discloses a conical balloon pulsed ablation catheter, comprising: a double-layer balloon structure, an ablation catheter body 1 and a grasping handle 2 connected in sequence; the double-layer balloon structure includes an outer balloon 3 and an inner balloon 4 sleeved inside the outer balloon 3; the inner surface of the outer balloon 3 is connected to the outer surface of the inner balloon 4; both the outer balloon 3 and the inner balloon 4 are conical structures in the inflated state; a plurality of ablation electrodes 5 are provided on the outer surface of the outer balloon 3; a control cavity 6 and a perfusion lumen 7 are provided inside the ablation catheter body 1; a control wire 8 is provided in the control cavity 6; a cavity 9 is provided in the middle of the inner balloon 4; the control wire 8 passes through the cavity 9 and is connected to the ablation electrode 5; a perfusion tube body 10 is provided inside the perfusion lumen 7; one end of the perfusion tube body 10 is communicated with the inner balloon 4.
[0032] The above technical solution can increase the contact area between the ablation catheter and the heart by setting a conical balloon structure, avoid cardiac perforation caused by high tension, and allow the conical balloon to enter the pulmonary veins to find the pulmonary vein potential. Multiple ablation electrodes 5 can be selected to discharge simultaneously as needed, and the disappearance of the pulmonary vein potential can be monitored. Before use, the initial state of the double-layer balloon structure is a contracted state, and the ablation electrode 5 is in a folded state. When in use, first connect the end of the perfusion tube body 10 away from the double-layer balloon structure to the perfusion equipment, and insert one end of the ablation catheter into the lesion of the human pulmonary vein. Then, use the perfusion equipment to inject gas or liquid into the perfusion tube body 10, use the perfusion tube body 10 to fill the gas or liquid into the inner balloon 4, expand the inner balloon 4, and the inner balloon 4 expands the outer balloon 3. At this time, the double-layer balloon structure is in an expanded state, so that The ablation electrode 5 is exposed, so that the double-layer balloon structure fits the pulmonary vein wall, and different volumes of media are injected into the balloon so that the balloon has different diameters, thereby allowing the ablation catheter to adapt to pulmonary veins of different diameters, expanding the scope of application of the ablation catheter, and finally, a single or multiple ablation electrodes 5 can be selected to discharge simultaneously as needed to form a complete annular ablation line, which can improve the efficiency of pulmonary vein isolation ablation. Among them, the conical shape design of the double-layer balloon structure can increase the contact area with the heart and avoid heart perforation caused by high tension.
[0033] In this embodiment, a guide cavity 11 is provided inside the ablation catheter body 1; a guide wire 12 is provided inside the guide cavity 11; one end of the guide wire 12 passes through the cavity 9 and extends to the outside of the outer balloon 3; the other end of the guide wire 12 passes through the holding handle 2 and extends to the outside of the holding handle 2; by providing the guide wire, the ablation catheter can be guided and supported.
[0034] In this embodiment, the number of ablation electrodes 5 is 36; the 36 ablation electrodes 5 are arranged in 6 rows by 6 columns; adjacent ablation electrodes 5 form a pair of electrode groups, and one or more ablation electrodes 5 can be selected to discharge simultaneously as needed, which can improve the efficiency of pulmonary vein isolation ablation.
[0035] In this embodiment, two symmetrically arranged operating cavities 13 are provided inside the ablation catheter body 1; an operating wire 14 for adjusting the bending of the ablation catheter body 1 is provided in the operating cavity 13; a control handle 15 for controlling the operating wire 14 is provided on the holding handle 2; through the cooperation between the operating wire 14 and the control handle 15, the bending of the ablation catheter body 1 can be controlled, thereby controlling its bending angle in the double-layer balloon structure, thereby facilitating the operation of the ablation catheter to enter different pulmonary veins.
[0036] In this embodiment, a connection assembly is provided between the ablation catheter body 1 and the holding handle 2; the connection assembly includes a first connection column 16, a threaded connection column 17, a first protective housing 18, and a second connection column 19; the first connection column 16 is fixedly connected to one end of the ablation catheter body 1 close to the holding handle 2; the threaded connection column 17 is fixedly connected to one end of the first connection column 16 away from the ablation catheter body 1; the outer side of the threaded connection column 17 is threadedly connected with a first protective housing 18; the second connection column 19 is fixedly connected to one end of the threaded connection column 17 close to the holding handle 2; the other end of the second connection column 19 is fixedly connected to one end of the holding handle 2 close to the ablation catheter body 1; one end of the perfusion tube body 10 away from the double-layer balloon structure extends into the first protective housing 18 and is provided with a connector for facilitating connection with a perfusion device; when idle, the connector at one end of the perfusion tube body 10 can be protected by the first protective housing 18, thereby not only preventing dust from accumulating at the connector at one end of the perfusion tube body 10, but also avoiding abrasion of the perfusion tube body 10, and further increasing the service life of the ablation catheter. When the ablation catheter needs to be used, rotate the first protective housing 18 to expose the connector at one end of the perfusion tube body 1, so as to facilitate connecting the perfusion tube body 1 with the perfusion device. Subsequently, use the perfusion device and the perfusion tube body 1 to fill or suck out the medium into the inner layer balloon 4 to expand or fold the double-layer balloon structure, and the operation is simple and convenient.
[0037] Through the connection assembly, the above technical solution can protect the perfusion tube body 10, solve the problems of more dust and easy damage of the existing connection pipe head, not only avoid damage or dust accumulation at the connector of the perfusion tube body 10, but also prevent the connection part of the perfusion tube body 10 from falling off, and extend the service life of the ablation catheter.
[0038] In this embodiment, a first threaded hole is formed on one side of the first protective housing 18; the threaded connection column 17 is threadedly connected in the first threaded hole; a rotation hole communicating with the first threaded hole is formed on the other side of the first protective housing 18; the second connection column 19 passes through the rotation hole, which facilitates the sliding of the first protective housing 18 along the second connection column 19, so as to facilitate the adjustment of the position of the first protective housing 18.
[0039] In this embodiment, the number of ablation catheter bodies 1 is 2; the 2 ablation catheter bodies 1 are symmetrically arranged.
[0040] In this embodiment, a connection pipeline 20 and an ablation device 21 are further included; one end of the connection pipeline 20 is connected to the holding handle 2; the other end of the connection pipeline 20 is connected to the ablation device 21; the connection pipeline 20 can facilitate the connection between the holding handle 2 and the ablation device 21, so as to facilitate the catheter radiofrequency ablation treatment of the pulmonary vein.
[0041] In this embodiment, a protection component is provided at the connection between the connecting pipeline 20 and the holding handle 2; the protection component includes a fixed threaded column 22, a limiting block 23, a second protection housing 24, and protection balls 25; one end of the fixed threaded column 22 is fixedly connected to the outer side surface of the holding handle 2; the limiting block 23 is fixedly connected to the other end of the fixed threaded column 22; the second protection housing 24 is threadedly connected to the outside of the limiting block 23; a support hole is provided on the side of the second protection housing 24 away from the holding handle 2; the connecting pipeline 20 passes through the support hole; a plurality of protection balls 25 are rotatably connected to the inner surface of the support hole; the plurality of protection balls 25 are distributed in an annular array. During use, rotate the second protection housing 24 to move the second protection housing 24 away from the holding handle 2, so as to protect the connecting pipeline 20 by using the fixed threaded column 22 and the second protection housing 24. At the same time, the connecting pipeline 20 can be clamped by the protection balls 25, so that the position of the connecting pipeline 20 can be limited. This can not only prevent the connecting pipeline 20 from being severely worn due to random shaking, but also avoid affecting the use due to the loosening of the connecting pipeline 20, and extend the service life of the ablation catheter; at the same time, the protection balls 25 can protect the connecting pipeline 20 when the second protection housing 24 moves, and prevent the surface of the connecting pipeline 20 from being damaged when the second protection housing 24 moves.
[0042] Through the above technical solution, the protection component can protect the connection between the ablation catheter and the ablation device, avoid severe wear at the connection between the ablation catheter and the ablation device due to random shaking, and extend the service life of the ablation catheter.
[0043] In this embodiment, a second threaded hole is provided on the side of the second protection housing 24 close to the holding handle 2; the limiting block 23 is threadedly connected to the second threaded hole; the support hole is communicated with the second threaded hole.
[0044] In this embodiment, an anti-slip sleeve 26 is sleeved on the outside of the holding handle 2.
[0045] In this embodiment, both the outer balloon 3 and the inner balloon 4 are made of elastic materials and can expand to different diameters when injecting different volumes of media, improving the applicable range of the ablation catheter.
[0046] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A conical balloon pulse ablation catheter, characterized in that: include: A double-layer balloon structure, an ablation catheter body (1) and a gripping handle (2) connected in sequence; the double-layer balloon structure comprises an outer balloon (3) and an inner balloon (4) sleeved inside the outer balloon (3); a plurality of ablation electrodes (5) are arranged on the outer surface of the outer balloon (3); a control cavity (6) and an irrigation lumen (7) are arranged inside the ablation catheter body (1); a control wire (8) is arranged inside the control cavity (6); a cavity (9) is arranged in the middle of the inner balloon (4); the control wire (8) is passed through the cavity (9) and is connected to the ablation electrode (5); an irrigation tube body (10) is arranged inside the irrigation lumen (7); one end of the irrigation tube body (10) is connected to the inner balloon (4).
2. The conical balloon pulse ablation catheter according to claim 1, characterized in that: A guide cavity (11) is provided inside the ablation catheter body (1); a guide wire (12) is provided inside the guide cavity (11); one end of the guide wire (12) passes through the cavity (9) and extends to the outside of the outer balloon (3); the other end of the guide wire (12) passes through the holding handle (2) and extends to the outside of the holding handle (2).
3. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: The number of the ablation electrodes (5) is thirty-six; the thirty-six ablation electrodes (5) are arranged in a manner of six rows by six columns.
4. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: The ablation catheter body (1) is provided with two symmetrically arranged operating cavities (13); the operating cavity (13) is provided with an operating wire (14) for adjusting the bend of the ablation catheter body (1); and the holding handle (2) is provided with a control handle (15) for controlling the operating wire (14).
5. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: A connecting assembly is provided between the ablation catheter body (1) and the holding handle (2); the connecting assembly includes a first connecting column (16), a threaded connecting column (17), a first protective shell (18) and a second connecting column (19); the first connecting column (16) is fixedly connected to one end of the ablation catheter body (1) close to the holding handle (2); the threaded connecting column (17) is fixedly connected to one end of the first connecting column (16) away from the ablation catheter body (1); the first protective shell (18) is threadedly connected to the outer side of the threaded connecting column (17); the second connecting column (19) is fixedly connected to one end of the threaded connecting column (17) close to the holding handle (2); the other end of the second connecting column (19) is fixedly connected to one end of the holding handle (2) close to the ablation catheter body (1); the end of the perfusion tube body (10) away from the double-layer balloon structure extends into the first protective shell (18) and is provided with a connector.
6. The tapered balloon pulse ablation catheter according to claim 5, characterized in that: The number of the ablation catheter bodies (1) is two; the two ablation catheter bodies (1) are symmetrically arranged.
7. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: It also comprises a connecting pipeline (20) and an ablation device (21); one end of the connecting pipeline (20) is connected to the holding handle (2); and the other end of the connecting pipeline (20) is connected to the ablation device (21).
8. The tapered balloon pulse ablation catheter according to claim 7, characterized in that: A protective component is provided at the connection point between the connecting pipeline (20) and the gripping handle (2); the protective component comprises a fixed threaded column (22), a limit block (23), a second protective shell (24) and a protective ball (25); one end of the fixed threaded column (22) is fixedly connected to the outer surface of the gripping handle (2); the limit block (23) is fixedly connected to the other end of the fixed threaded column (22); the second protective shell (24) is threadedly connected to the outer side of the limit block (23); a support hole is provided on the side of the second protective shell (24) away from the gripping handle (2); the connecting pipeline (20) is passed through the support hole; a plurality of the protective balls (25) are rotatably connected to the inner surface of the support hole; the plurality of the protective balls (25) are distributed in a ring array.
9. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: The outer side of the grip handle (2) is covered with an anti-slip cover (26).
10. The tapered balloon pulse ablation catheter according to claim 1, characterized in that: The outer layer balloon (3) and the inner layer balloon (4) are both made of elastic material.