A large-angle reversing needle-exit structure for radiofrequency ablation catheter

Abstract

The present invention provides a large-angle reversing needle extraction structure for a radiofrequency ablation catheter, which comprises a handle cover, a push handle connecting rod mechanism, a gear connecting rod mechanism, a rack, and an electrode needle connecting rod. The gear connecting rod mechanism comprises a gear connecting rod tooth portion and an assembly rod. The push rod connecting rod mechanism is vertically guided and connected to the lower end surface of one end of the assembly rod, and the gear connecting rod mechanism is vertically fixed and connected to the upper end surface of the other end of the assembly rod. The gear connecting rod tooth portion is connected to the rack, the electrode needle connecting rod, and the electrode needle in sequence, thereby achieving horizontal needle extraction of the electrode needle through vertical movement, and the handle can be designed to be T-shaped to achieve the effect of convenient and comfortable control of needle extraction of the radiofrequency ablation catheter.

Description

Technical Field

[0001] The invention relates to the field of radiofrequency ablation, and in particular to a large-angle reversing needle outlet structure of a radiofrequency ablation catheter for gastroesophageal reflux. Background Art

[0002] As a type of thermal ablation, radiofrequency technology has become a trend in the industry with the development of minimally invasive ablation. Gastroesophageal reflux is a common chronic upper gastrointestinal motility disorder, which is caused by pathological changes such as excessive relaxation of the lower esophageal sphincter, hiatal hernia and relaxation of the esophagogastric junction, either alone or together. Radiofrequency ablation technology has developed rapidly in the treatment of gastroesophageal reflux disease due to its advantages of minimal invasiveness and good efficacy.

[0003] Radiofrequency ablation catheters are instruments that implement radiofrequency ablation technology. The current radiofrequency ablation catheter electrode needle removal method is to push the handle forward with the thumb or hook the handle backward to complete the needle removal / retraction process. The thumb's force direction is in the same straight line as the needle removal / retraction direction. Therefore, the handle design can only be a straight handle that is consistent with the needle removal / retraction direction. During the operation, the needle needs to be removed and retracted many times. The doctor holds the straight handle for a long time and the thumb repeatedly moves back and forth along the extension line of the straight handle. The handle feels poor to hold, and the operation is very inconvenient and easy to get tired. Summary of the invention

[0004] The present invention provides a large-angle reversing needle-extraction structure for a radiofrequency ablation catheter, which enables the force pushing the handle to change the needle-extraction direction of the radiofrequency ablation catheter through structural transmission conversion. The handle is designed to be T-shaped, which is easy to operate and comfortable to hold when used by doctors.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is implemented as follows:

[0006] A large-angle reversing needle removal structure for a radiofrequency ablation catheter comprises a handle cover, a push handle connecting rod mechanism, a gear connecting rod mechanism, a rack, and an electrode needle connecting rod, wherein the gear connecting rod mechanism comprises a gear connecting rod tooth portion and an assembly rod, wherein the gear connecting rod tooth portion is fixedly connected to one end of the assembly rod at an angle of 90 degrees upward in the horizontal direction of assembly, and the push handle connecting rod mechanism is guided to the other end of the assembly rod at an angle of 90 degrees downward in the horizontal direction of assembly, and the gear connecting rod tooth portion is connected to the rack and the electrode needle connecting rod in sequence.

[0007] Furthermore, the push handle connecting rod mechanism includes a connecting guide groove and a push block, and the push block is installed on the handle cover.

[0008] Furthermore, the gear connecting rod tooth portion is a fan-shaped structure, and the central angle of the fan-shaped structure is between 30-45 degrees. The gear connecting rod tooth portion and the assembly rod are integrally formed, and the gear connecting rod tooth portion includes an assembly hole. The gear connecting rod mechanism is installed on the handle cover through the assembly hole. An assembly column is provided on the assembly rod, and the assembly column is installed in the connecting guide groove.

[0009] Furthermore, the rack includes an electrode needle connecting rod assembly hole and a rack tooth portion, and the rack tooth portion and the gear connecting rod tooth portion form a gear rack connection.

[0010] Furthermore, one end of the electrode needle connecting rod is fixedly connected to the electrode needle connecting rod assembly hole, and the other end of the electrode needle connecting rod is fixedly connected to the electrode needle.

[0011] Furthermore, the fixed connection method includes adhesive connection, welding, and threaded connection.

[0012] Furthermore, the handle cover is T-shaped.

[0013] Working principle: Use your thumb to push the push block on the T-handle cover to move the push rod connecting mechanism up and down. Through the connection guide groove of the push rod connecting mechanism and the assembly column of the gear connecting rod mechanism, push the assembly rod to drive the gear connecting rod teeth to move around the center of the assembly hole. Through the cooperation of the gear connecting rod teeth and the rack teeth, the rack moves horizontally back and forth, driving the electrode needle connecting rod to move back and forth, driving the electrode needle to move forward and backward, thereby realizing the up and down movement of the thumb to drive the electrode needle to move forward and backward horizontally.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Through the cooperation of the push handle connecting rod mechanism, the gear connecting rod mechanism and the rack, the up and down movement of the thumb drives the electrode needle to move forward and backward, so that the setting direction of the handle is no longer restricted by the needle insertion / retraction direction. The handle can be designed into a more ergonomic T-shape, which is convenient and comfortable for the doctor to hold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The diagram is a schematic diagram of a large-angle reversing needle exit structure of a radiofrequency ablation catheter.

[0017] Figure 2 It is a schematic diagram of the push handle connecting rod mechanism.

[0018] Figure 3 It is a schematic diagram of the gear linkage mechanism.

[0019] Figure 4 is a schematic diagram of a rack.

[0020] Description of main component symbols:

[0021] 1-push handle connecting rod mechanism; 2-gear connecting rod mechanism; 3-rack; 4-electrode needle connecting rod; 5-handle cover; 11-push block; 12-connecting guide groove; 21-gear connecting rod tooth portion; 22-assembly rod; 23-assembly column; 24-assembly hole; 31-electrode needle connecting rod assembly hole; 32-rack tooth portion.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. DETAILED DESCRIPTION

[0023] Example 1

[0024] A large-angle reversing needle-exit structure for a radiofrequency ablation catheter is composed of a push handle connecting rod mechanism 1, a gear connecting rod mechanism 2, a rack 3, an electrode needle connecting rod 4, and a handle cover 5.

[0025] The push handle connecting rod mechanism 1 comprises a push block 11 and a connecting guide groove 12, and the push block is installed on the T-shaped vertical rod of the handle cover 5.

[0026] The gear-linkage mechanism 2 comprises a gear-linkage tooth portion 21, an assembly rod 22, an assembly column 23, and an assembly hole 24. The gear-linkage tooth portion 21 is a fan-shaped structure, and the angle of the fan-shaped structure is set to 45 degrees, thereby saving space. The handle can be designed into a T shape, and an assembly hole 24 is set near the center point of the lower end of the fan. The gear-linkage mechanism 2 is installed on the inner side of the handle on one side of the handle cover 5 through the assembly hole 24. One end of the assembly rod 22 is integrally formed with the lower end of the gear-linkage tooth portion 21, and the other end of the assembly rod 22 is provided with an assembly column 23, and the assembly column 23 is inserted into the connecting guide groove 12.

[0027] The rack 3 includes an electrode needle connecting rod assembly hole 31 and a rack tooth portion 32. There are two electrode needle connecting rod assembly holes 31, which are symmetrically arranged on the end face of one end of the rack 3. The rack 3 is a movable part. The rack tooth portion 32 forms a gear rack connection with the gear connecting rod tooth portion 21. The gear connecting rod tooth portion 21 moves along the center of the assembly hole, driving the rack 3 to move horizontally back and forth. The movement of the rack 3 drives the electrode needle connecting rod 4 to move horizontally back and forth, and further drives the electrode needle connected to the electrode needle connecting rod 4 to horizontally extend / retract the needle.

[0028] A supporting mechanism is provided inside the handle cover 5 to support the rack 3 and the electrode needle connecting rod 4 .

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-angle reversing needle-exit structure for a radiofrequency ablation catheter, comprising a handle cover, a push handle connecting rod mechanism, a gear connecting rod mechanism, a rack, and an electrode needle connecting rod, characterized in that: The gear-link mechanism comprises a gear-link tooth portion and an assembly rod, wherein the gear-link tooth portion is fixedly connected with one end of the assembly rod at an angle of 90 degrees upward in the assembly horizontal direction, and the push handle-link mechanism is guidedly connected with the other end of the assembly rod at an angle of 90 degrees downward in the assembly horizontal direction, and the gear-link tooth portion is connected with the rack and the electrode needle connecting rod in sequence; the push handle-link mechanism comprises a connecting guide groove and a push block, and the push block is mounted on the handle cover; the gear-link tooth portion is a fan-shaped structure, and the gear-link tooth portion is integrally formed with the assembly rod, and the gear-link tooth portion comprises an assembly hole, and the gear-link mechanism is mounted on the handle cover through the assembly hole, and an assembly column is arranged on the assembly rod, and the assembly column is mounted in the connecting guide groove; the rack comprises an electrode needle connecting rod assembly hole and a rack tooth portion, and the rack tooth portion forms a gear-rack connection with the gear-link tooth portion; one end of the electrode needle connecting rod is fixedly connected with the electrode needle connecting rod assembly hole, and the other end of the electrode needle connecting rod is fixedly connected with the electrode needle.

2. The large-angle reversing needle-exit structure of the radiofrequency ablation catheter according to claim 1, characterized in that: The fixed connection methods include adhesive connection, welding and threaded connection.

3. The large-angle reversing needle-exit structure of the radiofrequency ablation catheter according to claim 1, characterized in that: The handle cover is T-shaped.

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