Local pulsed electric field ablation electrode catheter

Abstract

The utility model discloses a local pulsed electric field ablation electrode catheter, relates to the technical field of electrode catheters, and solves the problems that an electrode catheter body and a handle body are inconvenient to assemble, the position of the electrode catheter body in the handle body may be affected, and poor contact is caused. An electrode catheter body is embedded in one end of the handle, a connecting structure is installed at the end, provided with the electrode catheter body, of the handle and located on the outer side of the electrode catheter body, and the connecting structure comprises a limiting sleeve fixedly embedded in one end of the handle; by installing the connecting structure, the electrode catheter body and the handle can be rapidly assembled, personnel operation is easy and convenient, displacement of the electrode catheter body in the handle can be effectively avoided, and poor contact of the electrode catheter body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode catheters, in particular to a local pulse electric field ablation electrode catheter. Background Art

[0002] The ablation electrode is a high-tech device used to treat heart disease. It is a thin and long electrode that is inserted into the patient's heart through a catheter and uses high-frequency current to ablate abnormal tissue inside the heart, thereby restoring the heart's normal rhythm and function. The main function of the ablation electrode is to eliminate abnormal electrical signals inside the heart, which may cause cardiac arrhythmias such as atrial fibrillation and ventricular fibrillation.

[0003] The existing public patent CN217138245U discloses a local intravenous electric field ablation electrode catheter. When the adjustment structure moves, the two moving blocks are adjusted so that the two moving blocks push the two fixed plates to move closer to each other through two connecting rods. When the two fixed plates are in close contact with each other, the electrode catheter body is reinforced. By setting a fixing structure and an adjustment structure, when the electrode catheter body is inserted into the handle body for initial installation and fixation, under the action of the adjustment structure, the fixing structure can further limit and fix the electrode catheter body, thereby ensuring that in actual operation, the electrode catheter body is difficult to automatically fall off the handle body, and the safety is relatively high.

[0004] During the above-mentioned use, in the process of fixing the electrode catheter body by the fixing plate of the fixing structure through the adjustment structure, in order to prevent the electrode catheter from loosening during the process of fixing it to the handle body, the personnel needs to hold the electrode catheter body with one hand and the handle body with the other hand. This requires the personnel to use the hand holding the handle or the hand holding the electrode catheter body to rotate the rotating sleeve in the adjustment structure. This not only makes it inconvenient to assemble the electrode catheter body and the handle body, but may also affect the position of the electrode catheter body inside the handle body, resulting in poor contact. Summary of the invention

[0005] The utility model aims to provide a local pulse electric field ablation electrode catheter which is easy to assemble between the electrode catheter and the handle, and can solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a local pulse electric field ablation electrode catheter, comprising a machine handle, an electrode catheter body is embedded in one end of the handle, one end of the handle on which the electrode catheter body is mounted is located on the outside of the electrode catheter body and is equipped with a connecting structure, the connecting structure comprises a limiting sleeve fixedly embedded in one end of the handle, one end of the handle on which the limiting sleeve is mounted is located on the inner side of the limiting sleeve and is also fixedly embedded with an embedded tube, a plurality of through holes equidistantly distributed in a circle are provided on the outer side of the embedded tube, a ring is fixedly sleeved on the outer side of the electrode catheter body located on the inside of the embedded tube, and an annular groove is provided on the outer side of the ring.

[0007] Preferably, a ball is movably embedded in the through hole on the outer side of the embedded tube, and the diameter of the ball is larger than the diameter of the through hole. The ball diameter being larger than the through hole diameter can prevent the ball from leaking out from the inside of the embedded tube, and the ball is movably engaged with the ring through the annular groove.

[0008] Preferably, the outer side of the ball is movably abutted against a movable tube 1, and one end of the movable tube 1 close to the ball is chamfered. The chamfering of the movable tube 1 can reduce movement resistance.

[0009] Preferably, the outer side of the movable tube 1 is fixedly sleeved with an anti-slip ring inside the limiting sleeve, and the anti-slip ring can prevent the movable tube 1 from detaching from the limiting sleeve. One end of the movable tube 1 located inside the limiting sleeve is movably abutted against a spring.

[0010] Preferably, a movable tube 2 is fixedly sleeved on the outer side of one end of the movable tube 1 away from the limiting sleeve, and a retaining ring is fixedly embedded in the inner side of one end of the movable tube 2 away from the movable tube 1, and the retaining ring can prevent the ball from falling out.

[0011] Preferably, the distance from the inner wall of the movable tube 2 to the embedded tube is smaller than the diameter of the ball, the inner ring diameter of the retaining ring is equal to the outer ring diameter of the embedded tube, and a plurality of shift blocks equidistantly distributed around the circumference are fixedly provided on the outer side of the movable tube 2. The ball embedded in the annular groove can prevent the electrode catheter body from detaching from the handle.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model installs the connection structure, and after the personnel moves the movable tube 1 and the movable tube through the shifting block in the connection structure, the electrode catheter body is inserted into the handle and then the shifting block is released. The movable tube 1 will be driven by the spring to press the ball and embed into the annular groove on the outer side of the ring, so that the electrode catheter body and the handle can be quickly assembled. The operation is simple and convenient for personnel, and the displacement of the electrode catheter body inside the handle can be effectively avoided, and the poor contact of the electrode catheter body can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembly of the electrode catheter body and the handle of the utility model;

[0016] Figure 3 It is a side cross-sectional schematic diagram of the connection between the electrode catheter body and the handle of the utility model;

[0017] Figure 4 It is a side sectional schematic diagram of the connection structure of the utility model.

[0018] In the figure: 1. handle; 2. electrode catheter body; 3. connection structure; 301. limit sleeve; 302. embedded tube; 303. ball; 304. movable tube 1; 305. spring; 306. movable tube 2; 307. retaining ring; 308. shift block; 309. anti-slip ring; 4. collar; 5. annular groove. Implementation

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0020] See also Figure 1 , Figure 2 The figure shows a local pulse electric field ablation electrode catheter, including a machine handle 1, an electrode catheter body 2 is embedded in one end of the handle 1, and a connecting structure 3 is installed on the outside of the electrode catheter body 2 at one end of the handle 1, the connecting structure 3 includes a limiting sleeve 301 fixedly embedded in one end of the handle 1, and an inner tube 302 is fixedly embedded on the inner side of the limiting sleeve 301 at one end of the handle 1, and a plurality of through holes equidistantly distributed in a circle are provided on the outer side of the inner tube 302, and a ring 4 is fixedly sleeved on the outer side of the electrode catheter body 2 located inside the inner tube 302, and an annular groove 5 is provided on the outer side of the ring 4.

[0021] See also Figure 2 , Figure 3A ball 303 is movably embedded in the through hole on the outer side of the embedded tube 302, and the diameter of the ball 303 is larger than the diameter of the through hole. The diameter of the ball 303 is larger than the diameter of the through hole, which can prevent the ball 303 from leaking out from the inner side of the embedded tube 302. The ball 303 is movably engaged with the sleeve ring 4 through the annular groove 5. The outer side of the ball 303 is movably abutted against a movable tube 1 304, and one end of the movable tube 1 304 close to the ball 303 is chamfered. The chamfering of the movable tube 1 304 can reduce the movement resistance.

[0022] See also Figure 4 The outer side of the movable tube 1 304 is located inside the limiting sleeve 301 and is fixedly sleeved with an anti-slip ring 309. The anti-slip ring 309 can prevent the movable tube 1 304 from escaping from the limiting sleeve 301. The movable tube 1 304 is located at one end inside the limiting sleeve 301 and is movably abutted against a spring 305. The outer side of the end of the movable tube 1 304 away from the limiting sleeve 301 is fixedly sleeved with a movable tube 2 306. The end of the movable tube 2 306 away from the movable tube 1 304 is fixedly embedded with a retaining ring 307. The retaining ring 307 can prevent the ball 303 from falling out.

[0023] See also Figure 4 The distance from the inner wall of the movable tube 306 to the embedded tube 302 is smaller than the diameter of the ball 303 , the inner diameter of the retaining ring 307 is equal to the outer diameter of the embedded tube 302 , and the ball 303 is embedded in the annular groove 5 to prevent the electrode catheter body 2 from detaching from the handle 1 .

[0024] Working principle for easy assembly between the electrode catheter and the handle: When assembling the electrode catheter body 2 and the handle 1, the person uses the shifting block 308 to move the movable tube 1 304 and the movable tube 2 306 while holding the handle 1. At this time, the ball 303 is located between the movable tube 2 306 and the embedded tube 302. Since the distance from the inner wall of the movable tube 2 306 to the embedded tube 302 is smaller than the diameter of the ball 303, the ball 303 has a certain range of movement but will not leave the through hole on the embedded tube 302. The user then inserts the electrode catheter body 2 into the handle 1 until the collar 4 abuts against the end of the handle 1, and then the person releases the shifting block. 308. At this time, the movable tube 1 304 and the movable tube 2 306 will move back and reset under the drive of the spring 305. The inner wall of the movable tube 1 304 will press against the ball 303, so that the ball 303 is embedded in the annular groove 5 outside the ring 4, and the ring 4 and the electrode catheter body 2 are limited, which can effectively prevent the electrode catheter body 2 from being separated from the handle 1. It is also easy for the user to move the shift block 308 while holding the handle 1 with one hand, making it simple and fast to assemble the electrode catheter body 2 and the handle 1, and can effectively prevent the electrode catheter body 2 from being displaced inside the handle 1, and avoid poor contact of the electrode catheter body 2. Embodiment 2

[0025] See also Figure 2This embodiment further explains the first embodiment. A plurality of shifting blocks 308 equidistantly distributed around a circle are fixedly disposed on the outer side of the second movable tube 306 .

[0026] In this embodiment, the shifting block 308 can increase the contact surface between the hand of the person and the second movable tube 306 , thereby increasing the friction between the hand of the person and the second movable tube 306 , making it easier for the person to move the second movable tube 306 through the shifting block 308 .

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A local pulse electric field ablation electrode catheter, comprising a machine handle (1), wherein an electrode catheter body (2) is embedded in one end of the handle (1), characterized in that: One end of the handle (1) on which the electrode catheter body (2) is mounted is located outside the electrode catheter body (2) and is provided with a connection structure (3); the connection structure (3) comprises a limiting sleeve (301) fixedly embedded in one end of the handle (1); one end of the handle (1) on which the limiting sleeve (301) is mounted is located inside the limiting sleeve (301) and is also fixedly embedded with an embedded tube (302); a plurality of through holes equidistantly distributed in a circumference are provided on the outside of the embedded tube (302); a collar (4) is fixedly sleeved on the outside of the electrode catheter body (2) and is located inside the embedded tube (302); an annular groove (5) is provided on the outside of the collar (4).

2. The local pulse electric field ablation electrode catheter according to claim 1, characterized in that: A ball (303) is movably embedded in the through hole outside the embedded tube (302), and the diameter of the ball (303) is larger than the diameter of the through hole. The ball (303) is movably engaged with the sleeve ring (4) through the annular groove (5).

3. The local pulse electric field ablation electrode catheter according to claim 2, characterized in that: The outer side of the ball (303) is movably abutted against a movable tube 1 (304), and one end of the movable tube 1 (304) close to the ball (303) is chamfered.

4. The local pulse electric field ablation electrode catheter according to claim 3, characterized in that: The outer side of the movable tube 1 (304) is located inside the limiting sleeve (301) and is fixedly sleeved with an anti-slip ring (309); one end of the movable tube 1 (304) located inside the limiting sleeve (301) is movably abutted against a spring (305).

5. The local pulse electric field ablation electrode catheter according to claim 4, characterized in that: A movable tube 2 (306) is fixedly sleeved on the outer side of one end of the movable tube 1 (304) away from the limiting sleeve (301), and a retaining ring (307) is fixedly embedded in the inner side of one end of the movable tube 2 (306) away from the movable tube 1 (304).

6. The local pulse electric field ablation electrode catheter according to claim 5, characterized in that: The distance between the inner wall of the movable tube 2 (306) and the embedded tube (302) is smaller than the diameter of the ball (303), the inner diameter of the retaining ring (307) is equal to the outer diameter of the embedded tube (302), and a plurality of shifting blocks (308) equidistantly distributed around the circumference are fixedly arranged on the outer side of the movable tube 2 (306).

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