Magnetic compatible radiofrequency ablation catheter

Abstract

The utility model discloses a magnetic compatible radiofrequency ablation catheter which comprises a guide sleeve and an ablation catheter body, a limiting assembly is arranged on the guide sleeve, the limiting assembly comprises a pair of U-shaped hack levers, a pair of first openings for the hack levers to penetrate through are formed in the guide sleeve, an arc-shaped clamping part is arranged at the end, located in the guide sleeve, of each first hack lever, and the other end of each first hack lever is provided with a second clamping part. When the end of the ablation catheter reaches the focus position, the two first frame rods get close to each other, then the ablation catheter is clamped through the two clamping parts, the two first frame rods are fixed together through the lock catch assembly, and then the ablation catheter can be fixed. According to the ablation catheter fixing device, when the end of the ablation catheter reaches the focus position, the two first frame rods are close to each other, then the ablation catheter is clamped through the two clamping parts, the two first frame rods are fixed together through the lock catch assembly, and then the ablation catheter can be fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a magnetically compatible radiofrequency ablation catheter. Background Art

[0002] Cardiac magnetic catheter ablation technology is one of the most effective minimally invasive surgeries for the treatment of arrhythmias. Its main features are high safety, good short-term and long-term efficacy, short learning curve, low labor intensity, and convenient remote communication. Its working principle is: a flexible magnetic catheter is sent into the surgical heart chamber through a long sheath, and the navigation magnet is moved to both sides of the patient's body. A navigation magnetic field is constructed within the surgical heart chamber. The synchronous movement of the navigation magnet drives the direction of the navigation magnetic field to change, thereby driving the flexible magnetic catheter head located in the surgical heart chamber to move in the direction of the navigation magnetic field, and finally positioning and navigating the catheter head electrode. In addition to magnetic navigation equipment, a flexible magnetic catheter (ablation catheter) that can move freely with the magnetic field is also required to complete the magnetic catheter ablation surgery.

[0003] When performing catheter ablation, the doctor will insert a short hollow tube called a guide cannula into the femoral vein, and then insert the ablation catheter into the guide cannula, and move the ablation catheter to the lesion location under visual environment to perform the operation. In this way, the position of the ablation catheter is not fixed during the operation, which will make the end position of the ablation catheter difficult to stabilize and easily retract or advance with the doctor's hand movements, thereby increasing the difficulty of the operation. Therefore, corresponding improvements are made to address this problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a magnetically compatible radiofrequency ablation catheter.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A magnetically compatible radiofrequency ablation catheter comprises a guide sleeve and an ablation catheter. The guide sleeve is provided with a limit assembly, which comprises a pair of U-shaped rods. The guide sleeve is provided with a pair of first openings for the rods to pass through. An arc-shaped clamping portion is provided at one end of the first rod located inside the guide sleeve. When the end of the ablation catheter reaches the lesion position, the two first rods are brought close to each other, and then the ablation catheter is clamped by the two clamping portions. The two first rods are fixed together by a locking assembly, so that the ablation catheter can be fixed.

[0007] Preferably, the locking assembly includes an insertion rod fixed at the end of one of the rack rods, and a second opening for inserting the insertion rod is opened at the end of the other rack rod. The insertion rod is provided with a stopper elastically connected thereto and capable of abutting against the second opening, and the cross-section of the stopper is triangular.

[0008] Preferably, a mounting groove is provided on the insertion rod, a spring is fixed in the mounting groove, and the other end of the spring is fixedly connected to the stopper.

[0009] Preferably, a rotatable arc-shaped inner clamping plate is detachably mounted on the inner surface of the clamping portion.

[0010] Preferably, a rubber pad is fixed to the inner curved surface of the inner clamping plate.

[0011] Preferably, an arc-shaped slide groove is provided on the inner arc surface of the clamping part, and a slider is provided on the outer arc surface of the inner clamping plate. The slider and the slide groove form a sliding connection. Positioning plates that stick to the inner clamping plate are provided at the upper and lower parts of the clamping part. A pair of circular holes are provided on the clamping part, and bolt assemblies for fixing the two positioning plates are inserted in the circular holes.

[0012] The beneficial effects of the utility model are:

[0013] 1. The device is provided with two racks. When the end of the ablation catheter reaches the lesion position, the two first racks are brought close to each other, and then the ablation catheter is clamped by two clamping parts. The two first racks are fixed together by a locking assembly to fix the ablation catheter.

[0014] 2. The device is provided with a locking assembly. When the two first rack rods are close to each other, the insertion rod will be inserted into the second opening, and the stopper will be squeezed into the insertion rod. When the stopper leaves the second opening, it will move out of the insertion rod under the action of elastic force and abut against the second opening.

[0015] 3. The device is provided with a rotatable arc-shaped inner clamping plate, which clamps the ablation catheter so that the ablation catheter will not retract or advance, but the ablation catheter can be rotated. The ablation catheter and the two inner clamping plates rotate together, so that the angle of the end of the ablation catheter can be adjusted, thereby improving flexibility.

[0016] 4. The device is provided with a detachable inner splint. The inner splint is placed in the slide groove, and then two positioning plates are respectively installed on the upper and lower parts of the inner splint. Then, the bolt assembly is installed in the round hole and tightened. Then, the inner splint can be installed on the clamping part, making it easy to disassemble and assemble the inner splint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the magnetically compatible radiofrequency ablation catheter proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the limiting component of the magnetically compatible radiofrequency ablation catheter proposed by the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the proposed magnetically compatible radiofrequency ablation catheter;

[0020] Figure 4 This is a schematic diagram of the frame rod structure of the magnetically compatible radiofrequency ablation catheter proposed by the utility model;

[0021] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure of the proposed magnetically compatible radiofrequency ablation catheter at point B;

[0022] Figure 6 For this utility model Figure 4 Schematic diagram of the enlarged structure at point C of the proposed magnetically compatible radiofrequency ablation catheter.

[0023] In the figure: 1, guide sleeve; 2, ablation catheter; 3, first opening; 4, frame rod; 5, insertion rod; 6, second opening; 7, mounting groove; 8, spring; 9, stopper; 10, clamping part; 11, inner clamping plate; 12, rubber pad; 13, slide groove; 14, slider; 15, positioning plate; 16, round hole; 17, bolt assembly. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-6 A magnetically compatible radiofrequency ablation catheter comprises a guide sleeve 1 and an ablation catheter 2. A limiting assembly is arranged on the guide sleeve 1. The limiting assembly comprises a pair of U-shaped rods 4. A pair of first openings 3 for the rods 4 to pass through are opened on the guide sleeve 1. An arc-shaped clamping portion 10 is arranged at one end of the first rod 4 located inside the guide sleeve 1. When the end of the ablation catheter 2 reaches the lesion position, the two first rods 4 are brought close to each other, and then the ablation catheter 2 is clamped by the two clamping portions 10. The two first rods 4 are fixed together by a locking assembly to fix the ablation catheter 2.

[0026] Preferably, the locking assembly includes an insertion rod 5 fixed at the end of one of the frame rods 4, and a second opening 6 for inserting the insertion rod 5 is opened at the end of the other frame rod 4. The insertion rod 5 is provided with a stopper 9 which is elastically connected thereto and can be abutted against the second opening 6. The cross-section of the stopper 9 is triangular. When the two first frame rods 4 are close to each other, the insertion rod 5 will be inserted into the second opening 6, and the stopper 9 will be squeezed into the inside of the insertion rod 5. When the stopper 9 leaves the second opening 6, it moves out of the insertion rod 5 under the action of elastic force and abuts against the second opening 6.

[0027] Preferably, the insertion rod 5 is provided with a mounting groove 7, in which a spring 8 is fixed, and the other end of the spring 8 is fixedly connected to the stopper 9, so that an elastic connection is formed between the stopper 9 and the insertion rod 5 through the spring 8.

[0028] Preferably, the inner surface of the clamping portion 10 is detachably mounted with a rotatable arc-shaped inner clamping plate 11, and the ablation catheter 2 is clamped by the two inner clamping plates 11, so that the ablation catheter 2 will not retract or advance, but the ablation catheter 2 can be rotated, and the ablation catheter 2 and the two inner clamping plates 11 rotate together, so that the angle of the end of the ablation catheter 2 can be adjusted, thereby improving flexibility.

[0029] Preferably, a rubber pad 12 is fixed to the inner arc surface of the inner clamping plate 11. By providing the rubber pad 12, the ablation catheter 2 can be clamped more tightly by the inner clamping plate 11, and the wear between the ablation catheter 2 and the inner clamping plate 11 can be effectively avoided.

[0030] Preferably, an arc-shaped slide groove 13 is provided on the inner arc surface of the clamping portion 10, and a slider 14 is provided on the outer arc surface of the inner clamping plate 11. The slider 14 forms a sliding connection with the slide groove 13. Positioning plates 15 that are close to the inner clamping plate 11 are provided on the upper and lower parts of the clamping portion 10. A pair of circular holes 16 are provided on the clamping portion 10. Bolt assemblies 17 for fixing the two positioning plates 15 are inserted into the circular holes 16. The inner clamping plate 11 is placed in the slide groove 13, and then the two positioning plates 15 are respectively installed on the upper and lower parts of the inner clamping plate 11. Then, the bolt assembly 17 is installed in the circular holes 16 and tightened. The inner clamping plate 11 can be installed on the clamping portion 10, so that the inner clamping plate 11 can be easily disassembled and assembled.

[0031] Working principle: When the end of the ablation catheter 2 reaches the lesion position, the two first rods 4 are brought close to each other, and then the ablation catheter 2 is clamped by the two inner clamps 11. When the two first rods 4 are close to each other, the insertion rod 5 will be inserted into the second opening 6, and the block 9 will be squeezed into the insertion rod 5. When the block 9 leaves the second opening 6, it is moved out of the insertion rod 5 under the elastic force of the spring 8 and pressed against the second opening 6, fixing the two first rods 4 together, so that the ablation catheter 2 will not retract or advance, but the ablation catheter 2 can be rotated, and the ablation catheter 2 and the two inner clamps 11 rotate together, so that the angle of the end of the ablation catheter 2 can be adjusted, thereby improving flexibility.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A magnetically compatible radiofrequency ablation catheter, comprising a guide cannula (1) and an ablation catheter (2), characterized in that: The guide tube (1) is provided with a limit assembly, which includes a pair of U-shaped rods (4). The guide tube (1) is provided with a pair of first openings (3) for the rods (4) to pass through. One end of the first rod (4) located inside the guide tube (1) is provided with an arc-shaped clamping portion (10). When the end of the ablation catheter (2) reaches the lesion position, the two first rods (4) are brought close to each other, and then the ablation catheter (2) is clamped by the two clamping portions (10). The two first rods (4) are fixed together by the locking assembly, so that the ablation catheter (2) can be fixed.

2. The magnetically compatible radiofrequency ablation catheter according to claim 1, characterized in that: The locking assembly comprises an insertion rod (5) fixed at the end of one of the rack rods (4); a second opening (6) for inserting the insertion rod (5) is provided at the end of the other rack rod (4); a stopper (9) elastically connected thereto and capable of abutting against the second opening (6) is provided on the insertion rod (5); and the cross section of the stopper (9) is triangular.

3. The magnetically compatible radiofrequency ablation catheter according to claim 2, characterized in that: The insert rod (5) is provided with a mounting groove (7), a spring (8) is fixed in the mounting groove (7), and the other end of the spring (8) is fixedly connected to a stopper (9).

4. The magnetically compatible radiofrequency ablation catheter according to claim 1, characterized in that: The inner surface of the clamping portion (10) is detachably provided with a rotatable arc-shaped inner clamping plate (11).

5. The magnetically compatible radiofrequency ablation catheter according to claim 4, characterized in that: A rubber pad (12) is fixed to the inner curved surface of the inner clamping plate (11).

6. The magnetically compatible radiofrequency ablation catheter according to claim 4, characterized in that: The inner arc surface of the clamping part (10) is provided with an arc-shaped slide groove (13), the outer arc surface of the inner clamping plate (11) is provided with a slider (14), the slider (14) and the slide groove (13) form a sliding connection, and the upper and lower parts of the clamping part (10) are provided with positioning plates (15) that are attached to the inner clamping plate (11), and the clamping part (10) is provided with a pair of circular holes (16), and bolt assemblies (17) for fixing the two positioning plates (15) are inserted into the circular holes (16).

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