Bipolar ablation needle

Abstract

The invention aims at providing a bipolar ablation needle which comprises a shell, and a sliding groove and a sliding block matched with the sliding groove are arranged in the shell; the needle tail part of the first ablation needle is fixed in the shell; the needle tail part of the second ablation needle is fixedly connected with the sliding block, and the first ablation needle and the second ablation needle are arranged in parallel; and the sliding adjusting assembly is connected with the sliding block, and when the sliding adjusting assembly is driven, the sliding adjusting assembly drives the sliding block to slide in the sliding groove. Therefore, the two ablation needles can be kept parallel, the needle tip gap distance can be adjusted according to the operation requirement, the operation difficulty is lowered, and the operation risk is reduced.

Description

Technical Field

[0001] This application relates to the field of ablation technology, and more particularly to a bipolar ablation needle. Background Technology

[0002] In recent years, with the continuous development of pulsed bioelectricity, pulsed electric fields have received widespread attention for their non-thermal and minimally invasive biomedical efficacy and are gradually being applied to the clinical treatment of tumors. This treatment method often requires reaching the lesion area inside the body through a puncture needle for ablation. Currently, monopolar ablation needles are usually used for independent puncture. Considering the size of the patient's lesion area and treatment efficiency, two monopolar ablation needles are often selected for ablation treatment. During treatment, it is usually required to ensure that the two independent ablation needles remain parallel under the detection of imaging equipment after being punctured to the target position, and that the distance between the tips of the two ablation needles meets the parameter conditions for initiating treatment. This results in a high level of medical skill required during the operation and increases the surgical risk. Summary of the Invention

[0003] One objective of this application is to provide a bipolar ablation needle that can keep two ablation needles parallel during ablation treatment and has an adjustable needle tip gap, thereby reducing the difficulty of operation and minimizing surgical risks.

[0004] According to one aspect of this application, a bipolar ablation needle is provided, comprising:

[0005] A housing, wherein a sliding groove is provided inside the housing, and a slider that cooperates with the sliding groove;

[0006] The first ablation needle, wherein the needle tail portion of the first ablation needle is fixed inside the housing;

[0007] The second ablation needle, wherein the needle tail portion of the second ablation needle is fixedly connected to the slider, and the first ablation needle and the second ablation needle are arranged parallel to each other;

[0008] A sliding adjustment component, wherein the sliding adjustment component is connected to the slider, and when the sliding adjustment component is driven, it causes the slider to slide in the groove.

[0009] In some embodiments, the sliding adjustment assembly includes a knob assembly and a transmission assembly. The knob assembly is disposed on the outside of the housing and rotatably connected to the housing, and is connected to the transmission assembly disposed inside the housing through an opening on the housing. The transmission assembly is connected to the slider.

[0010] In some embodiments, the transmission assembly includes a turntable assembly and a linkage assembly, the turntable assembly being connected to both the linkage assembly and the knob assembly, and the linkage assembly being connected to the slider.

[0011] In some embodiments, the connecting rod assembly includes a connecting rod and a short crankshaft, the short crankshaft being rotatably connected to the slider, the connecting rod being rotatably connected to the short crankshaft, and the connecting rod being movably connected to the turntable assembly.

[0012] In some embodiments, the turntable assembly includes a turntable and a column, the turntable being rotatably connected to the housing, one end of the column being fixed to the edge of the turntable and the other end being fixedly connected to the knob assembly, and the connecting rod being sleeved on the column.

[0013] In some embodiments, the two ends of the connecting rod are rotatably connected to the housing and the short crank shaft, respectively, and a through groove is provided in the middle of the connecting rod. The column passes through the through groove and is fixedly connected to the knob assembly.

[0014] In some embodiments, the knob assembly includes a rotary button and a first retaining pin, the rotary button being disposed on the outside of the housing and rotatably connected to the housing via the first retaining pin.

[0015] In some embodiments, a scale is provided on the outer side of the housing at the end closer to the needle tips of the first and second ablation needles.

[0016] In some embodiments, the bipolar ablation needle further includes a first wire connector assembly and a second wire connector assembly, with one end of the first and second wire connector assemblies respectively connected to the first and second ablation needles, and the other end respectively connected to an energy generating device.

[0017] Compared with the prior art, this application provides a bipolar ablation needle, including a housing, wherein a groove is provided inside the housing, and a slider cooperating with the groove; a first ablation needle, wherein the tail portion of the first ablation needle is fixed inside the housing; a second ablation needle, wherein the tail portion of the second ablation needle is fixedly connected to the slider, and the first ablation needle and the second ablation needle are arranged parallel to each other; and a sliding adjustment assembly, wherein the sliding adjustment assembly is connected to the slider, and when the sliding adjustment assembly is driven, it causes the slider to slide in the groove. This allows the two ablation needles to remain parallel and the needle tip gap distance to be adjusted according to surgical needs, thereby reducing operational difficulty and surgical risks. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This diagram illustrates a bipolar ablation needle according to one embodiment of the present application;

[0020] Figure 2A partial internal schematic diagram of a bipolar ablation needle according to an embodiment of this application is shown;

[0021] Figure 3 A partial cross-sectional view of a bipolar ablation needle according to one embodiment of this application is shown;

[0022] Figure 4 This diagram illustrates a slider according to one embodiment of the present application;

[0023] Figure 5 A partial cross-sectional view of a bipolar ablation needle according to one embodiment of this application is shown;

[0024] Figure 6 This diagram shows a partial schematic of a bipolar ablation needle according to one embodiment of the present application;

[0025] Figure 7 This diagram shows a partial schematic of a bipolar ablation needle according to one embodiment of the present application;

[0026] Figure 8 This diagram illustrates a housing according to one embodiment of the present application;

[0027] The same or similar reference numerals in the accompanying drawings represent the same or similar parts.

[0028] Figure Labels

[0029] 100 - Housing, 110 - Slide groove, 120 - Upper housing, 130 - Lower housing;

[0030] 200 - First ablation needle; 300 - Second ablation needle;

[0031] 400-Sliding adjustment assembly, 410-Knob assembly, 411-Rotary button, 412-First fixing pin, 420-Transmission assembly, 421-Turntable assembly, 421A-Turntable, 421B-Column, 422-Connecting rod assembly, 422A-Connecting rod, 422B-Short crankshaft;

[0032] 500-slider;

[0033] 600 - First wire connector assembly, 700 - Second wire connector assembly. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0040] Figure 1 , 2 A schematic diagram and a partial internal schematic diagram of a bipolar ablation needle according to one embodiment of this application are shown respectively. Figure 1 , 2As shown, the bipolar ablation needle includes: a housing 100, wherein a groove 110 is provided inside the housing, and a slider 500 that cooperates with the groove 110; a first ablation needle 200, wherein the tail portion of the first ablation needle 200 is fixed inside the housing 100; a second ablation needle 300, wherein the tail portion of the second ablation needle 300 is fixedly connected to the slider 500, and the first ablation needle 200 and the second ablation needle 300 are arranged parallel to each other; and a sliding adjustment assembly 400, wherein the sliding adjustment assembly 400 is connected to the slider 500, and when the sliding adjustment assembly 400 is driven, it causes the slider 500 to slide in the groove 110, thereby adjusting the distance between the first ablation needle 200 and the second ablation needle 300.

[0041] In some embodiments, reference Figure 3 The partial cross-sectional view of the bipolar ablation needle shown indicates that the housing 100 can be formed by splicing an upper housing 120 and a lower housing 130. Sliding grooves 110 are provided on the inner sides of both the upper housing 120 and the lower housing 130. The slider 500 simultaneously engages with the sliding grooves 110 provided in both the upper housing 120 and the lower housing 130, and slides within them. To facilitate the sliding of the slider 500 and its connection with the sliding adjustment assembly 400, the slider 500 can be designed as follows: Figure 4 The concave structure shown has two sides for assembly with the sliding grooves 110 inside the upper housing 120 and the lower housing 130, and the recessed space in the middle can cooperate with the sliding adjustment component 400.

[0042] In some embodiments, such as Figure 2 As shown, the length directions of the first ablation needle 200 and the second ablation needle 300 are both perpendicular to the sliding direction of the slider 500 in the groove 110, so that the second ablation needle 300 can always remain parallel to the first ablation needle 200 when it moves with the slider 500.

[0043] In some embodiments, the initial, unmoved distance between the first ablation needle 200 and the second ablation needle 300 can be designed based on application requirements. To facilitate manipulation of small tumors or small human organs, such as pancreatic tumors or prostate tumors, a smaller initial distance is typically designed, for example, 3-5 mm. This allows for greater operational flexibility in adjusting the distance between the two ablation needles.

[0044] In some embodiments, the first ablation needle 200 and the second ablation needle 300 may be connected to the interior of the housing 100 and the slider 500 respectively by existing or future fixed connection methods such as bonding, interference fit, and threaded connection. The connection between the first ablation needle 200, the second ablation needle 300 and the interior of the housing 100 and the slider 500 may be non-removable or detachable.

[0045] In some embodiments, the outer surfaces of the first ablation needle 200 and the second ablation needle 300 are provided with an outer sleeve. The outer sleeve is made of an insulating material, including but not limited to polyimide. The length of the outer sleeve is less than the length of the ablation needle body. When the ablation needle is not in use, the outer sleeve can completely cover the portion of the ablation needle body exposed in the housing, thereby protecting the exposed portion of the ablation needle. The end of the outer sleeve near the tip of the ablation needle can be straight or have a beveled tip.

[0046] In some embodiments, such as Figure 3 As shown, the sliding adjustment assembly 400 includes a knob assembly 410 and a transmission assembly 420. The knob assembly 410 is disposed on the outside of the housing 100 and rotatably connected to the housing 100, and is connected to the transmission assembly 420 disposed inside the housing 100 through an opening on the housing 100. The transmission assembly 420 is connected to the slider 500. By adjusting the knob assembly 410, the transmission assembly 420 inside the housing 100 is moved, thereby causing the connected slider 500 to slide in the slide groove 100, thus moving the second ablation needle 300 and adjusting the distance between it and the first ablation needle 200. In some embodiments, the transmission assembly 420 can be designed to convert the rotation of the knob assembly 410 into the sliding of the slider 500 in the slide groove 110, such as a lead screw structure, a connecting rod structure, or a gear and rack structure. This embodiment does not limit this design.

[0047] In some embodiments, to make the overall structure of the bipolar ablation needle flatter and more flexible, and to avoid obstructing the operating space of the ultrasound probe during actual operation, the transmission assembly adopts a linkage structure. For example... Figure 5 As shown, the transmission assembly 420 includes a turntable assembly 421 and a connecting rod assembly 422. The turntable assembly 421 is connected to both the connecting rod assembly 422 and the knob assembly 410. The connecting rod assembly 422 is connected to the slider 500. In some embodiments, the turntable assembly 421 is fixedly connected to the knob assembly 410 through an opening in the housing 100. When the knob assembly 410 rotates, it drives the turntable assembly 421 to rotate as well. The connecting rod assembly 422 is movably connected to both the turntable assembly 421 and the slider 500. When the turntable assembly 421 rotates, the connecting rod assembly 422 also moves, thereby driving the slider 500 to slide along the slide groove 110, adjusting the distance between the two ablation needles. Here, the fixed connection includes, but is not limited to, bonding, interference fit, and threaded connection; the movable connection includes, but is not limited to, pin connection, bearing connection, and slide groove connection. This embodiment does not limit this.

[0048] In some embodiments, such as Figure 6As shown, the connecting rod assembly 422 includes a connecting rod 422A and a short crank shaft 422B. The short crank shaft 422B is rotatably connected to the slider 500, and the connecting rod 422A is rotatably connected to the short crank shaft 422B. The connecting rod 422A is movably connected to the turntable assembly 421. The cooperation between the connecting rod 422A and the short crank shaft 422B makes the movement of the second ablation needle 300 smoother and the internal structure of the bipolar ablation needle more compact. In some embodiments, the length of the short crank shaft 422B is less than the length of the recessed portion in the middle of the slider 500. The short crank shaft 422B can rotate with the connecting rod 422A in the recessed portion in the middle of the slider 500, driving the slider 500 to move, making the structural design more compact. In some embodiments, the rotatable connection includes, but is not limited to, a pin connection and a bearing connection. The movable connection includes, but is not limited to, a pin connection, a bearing connection, and a groove connection. This embodiment does not limit this. For example, refer to... Figure 6 The schematic diagram shows that the crankshaft 422B and the slider 500, as well as the connecting rod 422A and the crankshaft 422B, can be connected by a fixing pin. A second fixing pin can be fixedly connected to the slider 500 (e.g., by bonding, interference fit, threaded connection, etc.), with one end of the crankshaft 422B sleeved on the second fixing pin, allowing the crankshaft 422B to rotate around the second fixing pin. A third fixing pin can be fixedly connected to the other end of the crankshaft 422B, with the connecting rod 422A sleeved on the third fixing pin, allowing the connecting rod 422A to rotate around the third fixing pin.

[0049] In some embodiments, such as Figure 6 As shown, the turntable assembly 421 includes a turntable 421A and a column 421B. The turntable 421A is rotatably connected to the housing 100. One end of the column 421B is fixed to the edge of the turntable 421A, and the other end is fixedly connected to the knob assembly 410. The connecting rod 422A is sleeved on the column 421B. When the knob assembly 410 rotates, the column 421B drives the turntable 421A to rotate, causing the connecting rod 422A sleeved on the column 421B to swing accordingly, thereby driving the crank short shaft 422B and the slider 500 to move, adjusting the distance between the ablation needles. The fixed connection between the column 421B, the turntable 421A, and the knob assembly 410 includes, but is not limited to, bonding, interference fit, and threaded connection. The rotatable connection includes, but is not limited to, pin connection and bearing connection.

[0050] In some embodiments, to make the bipolar ablation needle structure compact and flexible, such as Figure 6 , 7As shown, the two ends of the connecting rod 422A are rotatably connected to the housing 110 and the short crank shaft 422B, respectively. A through groove is provided in the middle of the connecting rod 422A, and the column 421B passes through the through groove and is fixedly connected to the knob assembly 410. This allows the connecting rod 422A to rotate relative to the column 421B, and also allows the column 421B to move within the through groove. Compared to directly connecting the two ends of the connecting rod 422A to the turntable 421A and the short crank shaft 422B, this design offers a wider adjustment range, more flexible movement, and a more compact structure.

[0051] In some embodiments, to better control the rotation of the knob assembly 410, the opening on the housing 100 through which the post 421B passes and connects to the knob assembly 410 can be configured as follows: Figure 8 The arc-shaped through-slot is shown. The length of the arc-shaped through-slot can be designed based on the adjustable range of the distance between the two ablation needles.

[0052] In some embodiments, such as Figure 7 As shown, the knob assembly 410 includes a rotary button 411 and a first fixing pin 412. The rotary button 411 is disposed on the outside of the housing 100 and is rotatably connected to the housing 100 via the first fixing pin 412. For example, as Figure 7 , 8 As shown, the housing may have a through hole, through which the first fixing pin 412 passes and is fixedly connected to the rotary button 411. When the rotary button 411 is driven, the rotary button 411 and the first fixing pin 412 rotate together relative to the housing. To prevent the rotary button 411 from falling off, the diameter of the end of the first fixing pin 412 located inside the housing is larger than the diameter of the through hole.

[0053] In some embodiments, such as Figure 1 , 8 As shown, a scale is provided on the outer side of the housing 100, closer to the tips of the first and second ablation needles, to facilitate determining the ablation needle spacing for adjustment. This scale can be provided on both sides or one side of the housing. For ease of positioning during adjustment, a scale is typically provided on the side with the rotary knob.

[0054] In some embodiments, such as Figure 1As shown, the bipolar ablation needle further includes a first wire connector assembly 600 and a second wire connector assembly 700. One end of the first and second wire connector assemblies are respectively connected to the first and second ablation needles, and the other end is respectively connected to an energy generating device. One end of the first wire connector assembly 600 is connected to the needle tail of the first ablation needle 200, and the other end is connected to an external energy generating device. One end of the second wire connector assembly 700 is connected to the needle tail of the second ablation needle 300, and the other end is connected to an external energy generating device. The energy generating device includes, but is not limited to, a pulse generator, a radio frequency generator, or a microwave generator.

[0055] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices recited in the apparatus claims may also be implemented by a single unit or device in software or hardware. Terms such as "first," "second," etc., are used to indicate names and do not indicate any particular order.

Claims

1. A bipolar ablation needle, characterized in that, The bipolar ablation needle includes: A housing, wherein a sliding groove is provided inside the housing, and a slider that cooperates with the sliding groove; The first ablation needle, wherein the needle tail portion of the first ablation needle is fixed inside the housing; The second ablation needle, wherein the needle tail portion of the second ablation needle is fixedly connected to the slider, and the first ablation needle and the second ablation needle are arranged parallel to each other; A sliding adjustment component, wherein the sliding adjustment component is connected to the slider, and when the sliding adjustment component is driven, it causes the slider to slide in the groove.

2. The bipolar ablation needle according to claim 1, characterized in that, The sliding adjustment assembly includes a knob assembly and a transmission assembly. The knob assembly is disposed on the outside of the housing and rotatably connected to the housing, and is connected to the transmission assembly disposed inside the housing through an opening on the housing. The transmission assembly is connected to the slider.

3. The bipolar ablation needle according to claim 2, characterized in that, The transmission assembly includes a turntable assembly and a connecting rod assembly. The turntable assembly is connected to both the connecting rod assembly and the knob assembly. The connecting rod assembly is connected to the slider.

4. The bipolar ablation needle according to claim 3, characterized in that, The connecting rod assembly includes a connecting rod and a short crankshaft. The short crankshaft is rotatably connected to the slider, the connecting rod is rotatably connected to the short crankshaft, and the connecting rod is movably connected to the turntable assembly.

5. The bipolar ablation needle according to claim 4, characterized in that, The turntable assembly includes a turntable and a column. The turntable is rotatably connected to the housing. One end of the column is fixed to the edge of the turntable, and the other end is fixedly connected to the knob assembly. The connecting rod is sleeved on the column.

6. The bipolar ablation needle according to claim 5, characterized in that, The two ends of the connecting rod are rotatably connected to the housing and the short crank shaft, respectively. A through groove is provided in the middle of the connecting rod, and the column passes through the through groove and is fixedly connected to the knob assembly.

7. The bipolar ablation needle according to any one of claims 2 to 6, characterized in that, The knob assembly includes a rotary button and a first fixing pin. The rotary button is disposed on the outside of the housing and is rotatably connected to the housing via the first fixing pin.

8. The bipolar ablation needle according to any one of claims 1 to 7, characterized in that, A scale is provided on the outer side of the shell at the end closer to the tips of the first and second ablation needles.

9. The bipolar ablation needle according to any one of claims 1 to 8, characterized in that, The bipolar ablation needle also includes a first wire connector assembly and a second wire connector assembly. One end of the first and second wire connector assemblies are respectively connected to the first and second ablation needles, and the other end is respectively connected to the energy generating device.

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