A flexible radio frequency ablation electrode

Abstract

The utility model discloses a flexible radio frequency ablation electrode, include: shell, guide sleeve, flexible pipe, conductive slip ring and axial push, the shell is equipped with sliding installation part and handheld part, wherein the one side of sliding installation part is equipped with sliding channel along length direction, the guide sleeve can be slidably arranged in the sliding channel of shell, the flexible pipe is rotatable and axially position -limited and is arranged in the guide sleeve, and the one end of flexible pipe extends out the guide sleeve, and the flexible pipe is equipped with the electrically conductive body along the axial extension and fixed setting, the conductive slip ring includes outer connecting portion and rotatable installation on the rotating connecting shaft of outer connecting portion, and outer connecting portion is equipped with conductive touch end, and the rotating connecting axle is equipped with conductive connection end and rotating connection end, and the conductive touch end of outer connecting portion is electrically connected with the conductive connection end of rotating connecting axle. It can accurate control flexible pipe, and convenient operation reduces the operation difficulty.

Description

Technical Field

[0001] This utility model relates to a flexible radiofrequency ablation electrode, belonging to the field of medical device technology. Background Technology

[0002] Currently, radiofrequency ablation (RFA) is a minimally invasive treatment technique that uses high-frequency current to generate heat and selectively destroy target tissues. It is widely used in clinical fields such as arrhythmia and tumor treatment. Traditional RFA electrodes are mostly rigid structures. Although they have good conductivity and thermal conductivity, they suffer from problems such as low adhesion and poor adaptability when operating on complex or dynamic human tissue surfaces, which may lead to tissue damage.

[0003] With the development of flexible electronics technology, flexible radiofrequency ablation electrodes have gradually become a research hotspot. Flexible electrodes are usually composed of a polymer substrate and conductive materials, possessing good mechanical flexibility and tissue conformity, and are better able to adapt to the curved shape and dynamic movement of human organs, which helps to improve ablation accuracy and reduce the risk of collateral damage.

[0004] In the prior art, Chinese patent publication number CN210962290U discloses a flexible radiofrequency ablation electrode, which uses a support plate and a flexible tube for fixed connection. However, it has been found that this connection method restricts the range of motion of the flexible tube during surgery, making it difficult for doctors to simultaneously control its extension and movement, thus affecting equipment use and surgical safety. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a flexible radiofrequency ablation electrode that can precisely control the flexible tube, while being easy to operate and reducing the difficulty of surgical procedures.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a flexible radiofrequency ablation electrode, comprising:

[0007] The housing is provided with a sliding mounting part and a hand-held part, wherein a sliding channel is provided on one side of the sliding mounting part along the length direction;

[0008] A guide sleeve, which is slidably disposed within a sliding channel of the outer casing;

[0009] A flexible tube is rotatably and axially limited within the guide sleeve, with one end of the flexible tube extending out of the guide sleeve, and a conductive body extending axially and fixedly disposed inside the flexible tube.

[0010] A conductive slip ring includes an outer connecting part and a rotating connecting shaft rotatably mounted on the outer connecting part. The outer connecting part is provided with a conductive contact, and the rotating connecting shaft is provided with a conductive connecting end and a rotating connecting end. The conductive contact of the outer connecting part is electrically connected to the conductive connecting end of the rotating connecting shaft, and the conductive connecting end of the rotating connecting shaft is electrically connected to and fixedly connected to one end of a conductor inside the flexible tube.

[0011] An axial push block is provided with an insulating rod at one end. The axial push block is movably disposed on the other side of the sliding mounting part of the housing. The axial push block is coaxially and fixedly connected to the rotating connecting end of the rotating connecting shaft through the insulating rod.

[0012] Furthermore, the flexible radiofrequency ablation electrode also includes a return spring, one end of which is fixedly connected to the inner wall of the housing, and the other end is fixedly connected to the guide sleeve.

[0013] Furthermore, the guide sleeve is provided with multiple abutment protrusions along the axial extension direction;

[0014] The flexible radiofrequency ablation electrode also includes a limiting component, which includes:

[0015] A connecting shaft, which is installed inside the housing;

[0016] A trigger, the trigger being hinged to the connecting shaft, the trigger having an operating portion extending out of the housing;

[0017] A locking plate, which is fixed to the trigger;

[0018] A torsion spring is hinged to the connecting shaft, with its two ends abutting against the outer casing and the trigger, respectively. The torsion spring is adapted to drive the locking plate to remain in contact with the abutting protrusion.

[0019] Furthermore, the flexible radiofrequency ablation electrode also includes a rotating paddle, which is mounted on the axial push block and is adapted to drive the flexible tube to rotate via the rotating connecting shaft.

[0020] Furthermore, the flexible radiofrequency ablation electrode also includes a wire protection sleeve, which is installed at the end of the handheld portion of the housing.

[0021] Furthermore, a limiting protrusion is provided on the outer surface of the outer connecting part of the conductive slip ring;

[0022] The outer casing is provided with a limiting groove that is adapted to the limiting protrusion ring, and the limiting groove is adapted to restrict the axial movement of the conductive slip ring.

[0023] Furthermore, the outer casing is provided with a paddle indicator groove extending along the length direction of the guide sleeve;

[0024] The guide sleeve is provided with an indicator protrusion, which passes through the paddle indicator groove and extends to the outside of the housing.

[0025] Furthermore, the periphery of the paddle indicator groove is provided with indicator scales, which are distributed along the length direction of the paddle indicator groove.

[0026] By adopting the above technical solution, this utility model has the following beneficial effects:

[0027] In use, this invention uses an axial pusher on the outer shell to move the guide sleeve back and forth within the sliding channel of the outer shell, thereby fine-tuning the extension length of the flexible tube. Simultaneously, rotating the axial pusher drives the rotating connecting shaft to rotate. Since the rotating connecting shaft is coaxially fixed with the flexible tube, the flexible tube can be rotated. During radiofrequency ablation surgery, the operator can fine-tune the position and angle of the flexible tube according to different lesion locations and surgical needs, improving the precision and ease of operation of the procedure.

[0028] In addition, the cooperation between the return spring and the guide sleeve allows the flexible tube to return to its initial position after the operator releases the axial push block; the combination of the connecting shaft, trigger, locking plate and torsion spring in the limiting assembly realizes the locking function of multiple positions of the guide sleeve, and the operator can selectively abut against the abutment protrusion by operating the trigger to ensure the stability of the electrode position during the operation; the setting of the wire protective sleeve prevents the connecting wire from being damaged during repeated bending.

[0029] In summary, this invention achieves precise control of the flexible tube position, solves the technical problem of inconvenient adjustment of existing radiofrequency ablation electrodes during surgery, makes surgical operations safer and more precise, and is suitable for various radiofrequency ablation surgical scenarios. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the flexible radiofrequency ablation electrode of this utility model. Figure 1 ;

[0031] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the flexible radiofrequency ablation electrode of this utility model. Figure 2 . Detailed Implementation

[0033] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0034] like Figure 1-3 As shown, a flexible radiofrequency ablation electrode includes:

[0035] The outer casing 1 is provided with a sliding mounting part and a hand-held part 12, wherein a sliding channel is provided on one side of the sliding mounting part along the length direction;

[0036] Guide sleeve 2 is slidably disposed within the sliding channel of outer shell 1;

[0037] The flexible tube 3 is rotatably and axially limited inside the guide sleeve 2, and one end of the flexible tube 3 extends out of the guide sleeve 2. The flexible tube 3 is provided with a conductive body that extends axially and is fixedly installed inside the flexible tube 3.

[0038] The conductive slip ring includes an outer connecting part 41 and a rotating connecting shaft 42 rotatably mounted on the outer connecting part 41. The outer connecting part 41 is provided with a conductive contact, and the rotating connecting shaft 42 is provided with a conductive connecting end and a rotating connecting end. The conductive contact of the outer connecting part 41 is electrically connected to the conductive connecting end of the rotating connecting shaft 42. The conductive connecting end of the rotating connecting shaft 42 is electrically connected to and fixedly connected to one end of a conductor inside the flexible tube 3.

[0039] An axial push block 5 is provided with an insulating rod at one end. The axial push block 5 is movably mounted on the other side of the sliding mounting part of the housing 1. The axial push block 5 is coaxially and fixedly connected to the rotating connection end of the rotating connecting shaft 42 through the insulating rod.

[0040] In this embodiment, as Figure 1 and Figure 3 As shown, in use, by pushing the axial push block 5 on the outer shell 1, the guide sleeve 2 moves back and forth within the sliding channel of the outer shell 1, thereby fine-tuning the extension length of the flexible tube 3. Simultaneously, rotating the axial push block 5 drives the rotating connecting shaft 42 to rotate. Since the rotating connecting shaft 42 is coaxially fixed with the flexible tube 3, the rotation of the flexible tube 3 is achieved. During radiofrequency ablation surgery, the operator can fine-tune the position and angle of the flexible tube 3 according to different lesion locations and surgical needs, achieving point-pressing and other operations, improving the precision and ease of operation. The conductive slip ring is existing technology and will not be described in detail in this embodiment. During use, the number of conductive contacts on the outer connecting part 41 of the conductive slip ring and the conductive connection ends of the rotating connecting shaft 42 is not limited to one; a suitable number of conductive slip rings can be selected as needed. The flexible tube 3 has an ablation electrode head at its end, which is electrically connected to the other end of the conductor.

[0041] In this embodiment, the flexible tube 3 has an axial annular protrusion inside the guide sleeve 2, and an annular groove corresponding to the axial annular protrusion 31 is provided on the guide sleeve 2; wherein, the axial annular protrusion and the annular groove cooperate to enable the flexible tube 3 to rotate inside the guide sleeve 2 while being kept fixed in the axial direction, so as to prevent the flexible tube 3 from axially moving during operation.

[0042] Specifically, such as Figure 1 and Figure 3 As shown, the guide sleeve 2 has three abutment protrusions 21 along the axial extension direction;

[0043] The flexible radiofrequency ablation electrode also includes a limiting component, which includes:

[0044] A connecting shaft is installed inside the housing 1;

[0045] Trigger 72 is hinged to the connecting shaft and has an operating part extending out of housing 1;

[0046] The latch plate 73 is fixed to the trigger 72;

[0047] A torsion spring is hinged to the connecting shaft. The two ends of the torsion spring abut against the outer casing 1 and the trigger 72, respectively. The torsion spring is adapted to drive the locking plate 73 to remain in contact with the abutting protrusion 21.

[0048] In this embodiment, as Figure 1 and Figure 3 As shown, the return spring 6 works in conjunction with the guide sleeve 2 and the outer casing 1 to automatically return the guide sleeve 2 to its initial position after operation. When the user releases the pushing force on the guide sleeve 2, the return spring 6 releases its stored elastic potential energy, causing the guide sleeve 2 to move along the sliding channel back to its initial position. The limiting component works by controlling the engagement state between the locking plate 73 and the abutment protrusion 21 through the operating part of the trigger 72. When the torsion spring is in its natural state, its elastic force keeps the locking plate 73 in contact with the abutment protrusion 21, at which point the guide sleeve 2 is locked in a specific position. When the user presses the operating part of the trigger 72, the trigger 72 rotates around the connecting shaft, causing the locking plate 73 to disengage from the abutment protrusion 21, releasing the locked state, at which point the guide sleeve 2 can move freely along the sliding channel. After releasing the trigger 72, the elastic force of the torsion spring will cause the locking plate 73 to return to contact with the nearest abutment protrusion 21, relocking the position of the guide sleeve 2. In some embodiments, the number of abutment protrusions 21 is not limited to the number shown in the figure, and can be increased or decreased according to the need for precise positioning.

[0049] Specifically, such as Figure 3 As shown, the flexible radiofrequency ablation electrode also includes a rotating block 8, which is mounted on the axial push block 5. The rotating block 8 is adapted to drive the flexible tube 3 to rotate via the rotating connecting shaft 42.

[0050] In this embodiment, as Figure 3 As shown, the rotating block 8 is fixedly mounted on the axial push block 5. By operating the rotating block 8, the axial push block 5 can be rotated. Since the axial push block 5 is coaxially fixedly connected to the rotating connecting shaft 42, when the rotating block 8 rotates, the rotational force will be transmitted to the rotating connecting shaft 42 through the axial push block 5, thereby driving the flexible tube 3 to rotate around its axis.

[0051] Specifically, such as Figure 1 and Figure 3 As shown, the flexible radiofrequency ablation electrode also includes a wire protection sleeve 9, which is installed at the end of the handheld part 12 of the housing 1.

[0052] In this embodiment, as Figure 1 and Figure 3 As shown, the flexible radiofrequency ablation electrode also includes a connecting wire. One end of the connecting wire is connected to an external power supply, and the other end is electrically connected to a conductive contact on the outer connecting part 41 of the conductive slip ring. The wire protection sleeve 9 is located at the end of the handheld part 12 of the outer shell 1. It is mainly used to protect the connecting wire connected to the flexible radiofrequency ablation electrode and prevent the connecting wire from breaking or being damaged due to repeated bending at the connection point with the outer shell 1.

[0053] Specifically, such as Figure 1 and Figure 3 As shown, a limiting protrusion 43 is provided on the outer surface of the outer connecting part 41 of the conductive slip ring;

[0054] The outer casing 1 is provided with a limiting groove 14 that is adapted to the limiting protrusion ring 43. The limiting groove 14 is suitable for limiting the axial movement of the conductive slip ring.

[0055] In this embodiment, as Figure 3 As shown, a limiting protrusion 43 is provided circumferentially on the outer surface of the outer connecting part 41 of the conductive slip ring, which restricts the axial movement of the conductive slip ring and prevents the conductive slip ring from axial displacement or falling off during use.

[0056] Specifically, such as Figures 1 to 2 As shown, the outer casing 1 is provided with a paddle indicator groove 15 extending along the length direction of the guide sleeve 2;

[0057] The guide sleeve 2 is provided with an indicator protrusion 22, which passes through the paddle indicator groove 15 and extends to the outside of the housing 1.

[0058] Specifically, such as Figure 2 As shown, the paddle indicator groove 15 is provided with indicator scales around its periphery, and the indicator scales are distributed along the length direction of the paddle indicator groove 15.

[0059] In this embodiment, as Figure 3As shown, when the guide sleeve 2 moves within the sliding channel of the housing 1, the indicator protrusion 22 fixed on the guide sleeve 2 moves synchronously within the paddle indicator groove 15. Since the indicator protrusion 22 passes through the paddle indicator groove 15 and extends to the outside of the housing 1, the operator can directly determine the depth of the guide sleeve 2 by observing the position of the indicator protrusion 22 in the paddle indicator groove 15.

[0060] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible radiofrequency ablation electrode, characterized in that, include: The outer casing (1) is provided with a sliding mounting part and a hand-held part (12), wherein a sliding channel is provided on one side of the sliding mounting part along the length direction; Guide sleeve (2), which is slidably disposed in the sliding channel of the outer shell (1); A flexible tube (3) is rotatably and axially limitedly disposed inside the guide sleeve (2), and one end of the flexible tube (3) extends out of the guide sleeve (2). A conductive body is provided inside the flexible tube (3) that extends axially and is fixedly disposed. A conductive slip ring, comprising an outer connecting part (41) and a rotating connecting shaft (42) rotatably mounted on the outer connecting part (41). The outer connecting part (41) is provided with a conductive contact, and the rotating connecting shaft (42) is provided with a conductive connecting end and a rotating connecting end. The conductive contact of the outer connecting part (41) is electrically connected to the conductive connecting end of the rotating connecting shaft (42), and the conductive connecting end of the rotating connecting shaft (42) is electrically connected to and fixedly connected to one end of the conductor inside the flexible tube (3). An axial push block (5) is provided with an insulating rod at one end. The axial push block (5) is movably disposed on the other side of the sliding mounting part of the housing (1). The axial push block (5) is coaxially fixedly connected to the rotating connecting end of the rotating connecting shaft (42) through the insulating rod.

2. The flexible radiofrequency ablation electrode according to claim 1, characterized in that, It also includes a return spring (6), one end of which is fixedly connected to the inner wall of the outer shell (1), and the other end is fixedly connected to the guide sleeve (2).

3. The flexible radiofrequency ablation electrode according to claim 2, characterized in that, The guide sleeve (2) is provided with a plurality of abutment protrusions (21) along the axial extension direction; It also includes a limiting component, the limiting component comprising: A connecting shaft is installed inside the housing (1); A trigger (72) is hinged to the connecting shaft and has an operating part extending out of the housing (1); A locking plate (73) is fixed to the trigger (72); A torsion spring is hinged to the connecting shaft, with its two ends abutting against the outer casing (1) and the trigger (72) respectively. The torsion spring is adapted to drive the locking plate (73) to remain in contact with the abutting protrusion (21).

4. The flexible radiofrequency ablation electrode according to claim 1, characterized in that, It also includes a wire protection sleeve (9), which is installed at the end of the handle (12) of the housing (1).

5. The flexible radiofrequency ablation electrode according to claim 1, characterized in that, The outer surface of the outer connecting part (41) of the conductive slip ring is provided with a limiting protrusion (43); The outer shell (1) is provided with a limiting groove (14) that is adapted to the limiting protrusion (43), and the limiting groove (14) is adapted to restrict the axial movement of the conductive slip ring.

6. The flexible radiofrequency ablation electrode according to claim 1, characterized in that, The outer casing (1) is provided with a paddle indicator groove (15) extending along the length direction of the guide sleeve (2); The guide sleeve (2) is provided with an indicator protrusion (22), which passes through the paddle indicator groove (15) and extends to the outside of the outer casing (1).

7. The flexible radiofrequency ablation electrode according to claim 6, characterized in that, The paddle indicator groove (15) is provided with indicator scales around its periphery, and the indicator scales are distributed along the length direction of the paddle indicator groove (15).

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