Radio frequency ablation needle fixing device

Abstract

The utility model discloses a radiofrequency ablation needle fixing device which comprises a fixing base, a lifting rod, a suspension arm, a connecting piece and a fixing brace, the lifting rod is connected with the fixing base, a threaded column is arranged above the lifting rod, and the height of the suspension arm can be adjusted up and down along the lifting rod through two lifting nuts; the fixing brace comprises a fixing box and a fixing cover, the fixing box is provided with a fixing groove used for embedding the ablation needle, the fixing cover is connected to the top of the fixing box in an overturning mode, and when the fixing cover covers the fixing box, the ablation needle can be fixed. The whole fixing device is of a frame structure, the fixing brace is provided with the fixing groove specially matched with the ablation needle in model, the spatial position is locked through cooperation of the bolt and the nut, the tail end of the ablation needle is firmly fixed, the springback offset phenomenon caused by deformation of the fixing device is effectively avoided, and the fixing device is convenient to use. Meanwhile, the fixing device is more resistant to collision and wire pulling, and the needle point of the ablation needle is prevented from deviating.

Description

Technical Field

[0001] The utility model relates to a medical surgical instrument fixing device, in particular to a radiofrequency ablation needle fixing device. Background Art

[0002] Radiofrequency ablation technology mainly relies on a radiofrequency therapeutic device with ablation and cutting functions. The ablation needle is inserted into the specific lesion location, and the radiofrequency current flows through the human tissue. The rapid changes in the electromagnetic field are used to make the polarized water molecules in the tissue move at high speed, generating heat, causing the water inside and outside the cells of the lesion site to evaporate, dry, shrink and fall off, resulting in aseptic necrosis, thereby achieving the purpose of treatment.

[0003] Radiofrequency ablation is often used to treat tumor tissue. Because the procedure takes 5-6 minutes and requires the ablation needle to be kept in a fixed position, dislocation of the needle can cause accidental damage to normal tissue. Therefore, the surgeon must hold the ablation needle for a long time to keep the ablation site at the lesion.

[0004] However, if a person holds and maintains a certain position for a long time, it will cause muscle tremors. Generally, other tools are needed to assist in fixing the ablation needle. Currently, the commonly used fixing tools are modified from universal bamboo tubes (see the similar patent disclosure CN117582285A for details). There are also fixing tools made of other universal tubes (see the disclosure CN219940820U).

[0005] The fixing tools made of the above two types of universal tubes and universal bamboo tubes currently have the following defects:

[0006] 1. The fixing tool itself will have a certain rebound during the deformation process. When it fixes the ablation needle at the target position, the needle tip will shift after the tool is released due to the material deformation and rebound, and it cannot be truly fixed in the target position area.

[0007] 2. The above-mentioned fixation tool cannot withstand large collision forces. That is, during the operation, if the doctor slightly touches the fixation tool, it is easy to cause the universal bamboo tube to deform or swing back, causing the needle tip of the ablation needle to easily deviate from the target position. Utility Model Content

[0008] The purpose of the utility model is to provide a radiofrequency ablation needle fixing device, which adopts a frame structure as a whole. The fixing bracket has a fixing groove specially adapted to the ablation needle model. The spatial position is locked by the cooperation of bolts and nuts, and the tail end of the ablation needle is firmly fixed, effectively avoiding the rebound deviation caused by deformation of the fixing device. At the same time, the fixing device is more resistant to collision and wire pulling, avoiding the deviation of the ablation needle tip position.

[0009] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

[0010] A radiofrequency ablation needle fixing device includes a fixed base, a lifting rod, a suspension arm, a connecting piece and a fixed support, wherein the fixed base can be connected to the operating table; the lifting rod is connected to the fixed base, and there is a threaded column above the lifting rod. The suspension arm can adjust the height up and down along the lifting rod, and the lifting rod is provided with two lifting nuts; a suspension tube and a suspension front end are provided at both ends of the suspension arm, and the suspension tube is sleeved on the lifting rod, and the lifting nuts clamp the upper and lower ends of the suspension tube for locking the position of the suspension tube; the connecting piece includes two vertically arranged flipping parts and swinging parts, the swinging part is connected to the suspension front end of the suspension arm, the flipping part is connected to the fixed support, the swinging part is locked to the suspension arm through the swinging locking nut, and the flipping part is locked to the fixed support through the flip locking nut; the fixed support can be detachably fixed to the ablation needle.

[0011] Preferably, the radiofrequency ablation needle fixing device also includes an extension arm, and the two ends of the extension arm are respectively provided with an extension front end and an extension tube, the extension tube can be sleeved on the lifting rod, and the two lifting nuts of the lifting rod can clamp the extension tube to control the height of the extension arm relative to the lifting rod; a threaded column is provided at the front end of the extension arm, and the shape of the threaded column is the same as that of the lifting rod, and the suspension arm can be sleeved in the threaded column at the front end of the extension arm, and the front end of the extension arm is provided with an extension locking nut, and the extension locking nut cooperates with the threaded column at the front end of the extension arm to lock the suspension arm.

[0012] Preferably, the fixed base includes a slider seat, a lifting clamping sleeve and a clamping handle. The lifting clamping sleeve is fixed to the slider seat, the lifting rod is sleeved in the lifting clamping sleeve, and the clamping handle is tightened to control the inner diameter of the lifting clamping sleeve to expand or shrink.

[0013] Preferably, the fixing brace includes a brace seat and a fixing box, the fixing box has a fixing groove for embedding the ablation needle, the brace seat is connected to the connector by a flip locking nut, and the brace seat and the fixing box are detachably connected.

[0014] Preferably, the fixing brace includes a fixing cover, which is flipped and connected to the top of the fixing box. When the fixing cover is closed on the fixing box, the ablation needle can be fixed. The inner surface of the fixing cover facing the fixing groove is provided with a flexible part. When the ablation needle is placed in the fixing groove and the fixing cover is closed on the fixing box, the flexible part presses the ablation needle firmly down into the fixing groove.

[0015] Preferably, the fixing groove has an opening in front, and the ablation needle can enter the fixing groove through the opening. The side wall of the fixing groove has a fixing handle, and the fixing handle can be rotated to clamp the ablation needle in the fixing groove.

[0016] Preferably, the radiofrequency ablation needle fixing device also includes a wire holder for the ablation needle wire to pass through, and the wire holder is arranged on the surface of the suspension arm or the extension arm. The wire holder includes a fixed ring and a movable ring, and one end of the fixed ring and the movable ring can be flipped and moved through the wire shaft.

[0017] Preferably, a buckle is provided at the other end opening of the fixed ring and the movable ring, and a buckle groove is provided on the fixed ring or the movable ring. When the fixed ring and the movable ring are closed, the buckle is buckled into the buckle groove, and the fixed ring and the movable ring cannot be opened.

[0018] Compared with the existing technology, the radiofrequency ablation needle fixing device using the above technical solution has the following beneficial effects:

[0019] 1. The radiofrequency ablation needle fixing device of the present invention adopts a bracket and a nut to tighten the fixing device as a whole. After the ablation needle is placed, the rebound phenomenon caused by the elastic deformation of the material itself can be avoided, and the risk of the ablation needle deviating from the position after releasing the hand can be avoided.

[0020] The specific usage process is as follows: the surgeon first loosens all the nuts, and then tightens all the nuts after the ablation needle reaches the target position to fix the spatial position of the ablation needle. After locking, the ablation needle will no longer rebound.

[0021] Second, the stent is preferably made of aluminum alloy or stainless steel. Therefore, during the operation, when it is hit, the ablation needle will shake relatively little, the structure is difficult to deform, and the ablation needle is effectively positioned in the operating position.

[0022] 3. The height of the suspension arm on the lifting rod can be adjusted by two lifting nuts.

[0023] Fourth, the flip part and the swing part at the connecting piece allow the fixed brace to be adjusted to multiple angles in the horizontal and vertical positions.

[0024] 5. A fixing brace has been added to clamp the ablation needle through the fixing groove in the fixing box, firmly fix the tail end of the ablation needle to prevent the ablation needle from falling out.

[0025] 6. In the preferred solution, an extension arm (can be one or more) is added to effectively increase the swing distance. Currently, the operation only requires one extension arm to basically meet most radiofrequency ablation needs.

[0026] 7. In the preferred solution, a catheter holder is added to organize the wire at the tail of the radiofrequency ablation needle to avoid accidental pulling during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the use of the radiofrequency ablation needle fixing device in Example 1.

[0028] Figure 2 Schematic diagram of the use of the radiofrequency ablation needle fixing device in Example 1.

[0029] Figure 3 This is an exploded view of the radiofrequency ablation needle fixing device in Example 1.

[0030] Figure 4 This is a structural diagram of the fixed base in Example 1.

[0031] Figure 5 Schematic diagram of the connection between the extension arm and the lifting rod in Example 1.

[0032] Figure 6 Schematic diagram of the connection between the extension arm and the suspension arm in Example 1.

[0033] Figure 7 Schematic diagram of the connection between the fixing bracket and the connecting piece in Example 1.

[0034] Figure 8 Schematic diagram of the use of the fixing brace in Example 1.

[0035] Figure 9 This is a cross-sectional view of the fixation brace in Example 1.

[0036] Figure 10 This is a structural diagram of the wire holder in the open state in Example 1.

[0037] Figure 11 Schematic diagram of the structure of the wire holder in the closed state in Example 1.

[0038] Figure 12 Schematic diagram of the use of the fixing brace in Example 2.

[0039] Figure 13 Schematic diagram of the structure of the fixing brace in Example 2.

[0040] Figure 14 This is a structural diagram of the ablation needle in the fixed state in Example 3.

[0041] Figure 15 Detailed schematic diagram of the ablation needle fixing method in Example 3.

[0042] Figure 16 This is a schematic diagram of the cross-sectional structure of the height adjustment button in Example 3.

[0043] Figure 17 Schematic diagram of the cross-sectional structure of the translation button in Example 3.

[0044] Figure 18 This is a schematic diagram of the cross-sectional structure of the button in Example 3.

[0045] 1. Fixing base; 10. Slider seat; 11. Locking handle; 12. Lifting clamp; 13. Clamping handle; 2. Lifting rod; 3. Extension arm; 31. Extension front end; 32. Extension tube; 4. Suspension arm; 41. Suspension front end; 42. Suspension tube; 5. Connector; 51. Turning part; 52. Swinging part; 53. Suspension support; 54. Universal adjustment seat; 6. Fixing support; 60. Support seat; 61. Fixing box; 610. First locking hole; 611. Fixing slot; 612. Fixing handle; 62. Fixing cover; 620. Second locking hole; 621. Flexible member; 63. Support shaft; 7. Wire holder; 70. Connecting seat; 71. Fixing ring; 72. Wire shaft; 73. Flexible member Dynamic ring; 730, buckle groove; 74, fastener; 8, ablation needle; 9, support seat; 90, horizontal support; 900, universal ball rod; 901, guide rail; 902, limit groove; 91, vertical support; 910, movable groove; 911, slot; 912, clamping slot; 92, limit support; 920, fixed part; 921, rotating part; 922, positioning slot; 93, height adjustment button; 930, pressing part; 931, elastic part; 94, translation button; 940, push button; 941, rotating wheel; 942, limit rod; 943, elastic block; 95, button; 950, clamping part; 951, spring block; 02, lifting nut; 03, extension locking nut; 04, swing locking nut; 05, flip locking nut. DETAILED DESCRIPTION

[0046] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0047] Example 1:

[0048] like Figures 1 to 3 The radiofrequency ablation needle fixing device shown includes a fixing base 1 , a lifting rod 2 , an extension arm 3 , a suspension arm 4 , a connecting piece 5 and a fixing bracket 6 .

[0049] See also Figure 1 The fixed base 1 can be connected to the expansion frame on the side of the operating table.

[0050] See also Figure 4 The fixed base 1 includes a slider seat 10, a locking handle 11, a lifting and tightening sleeve 12 and a tightening handle 13. The locking handle 11 can be rotated to tighten the slider seat 10 and the operating table extension frame, so that the slider seat 10 is locked after the position is adjusted.

[0051] The lifting clamping sleeve 12 is fixed to the slider seat 10 , and the lifting rod 2 is sleeved in the lifting clamping sleeve 12 . The clamping handle 13 is tightened to control the lifting clamping sleeve 12 to clamp the lifting rod 2 .

[0052] See also Figure 3 and Figure 5 The lifting rod 2 is connected to the fixed base 1. A threaded stud is located above the lifting rod 2. The extension arm 3 (or suspension arm 4) can be adjusted up and down along the lifting rod 2. The lifting rod 2 is equipped with two lifting nuts 02. These nuts 02 clamp onto the extension tube 32, controlling the height of the extension arm 3 relative to the lifting rod 2 and preventing the lifting rod 2 from swinging horizontally.

[0053] See also Figure 6 The two ends of the extension arm 3 are respectively provided with an extended front end 31 and an extension tube 32. The extension tube 32 can be sleeved on the lifting rod 2. The front end of the extension arm 3 is provided with a threaded column. The shape of the threaded column is the same as that of the lifting rod 2. The suspension arm 4 can be sleeved in the threaded column at the front end of the extension arm 3. The front end of the extension arm 3 is provided with an extended locking nut 03. The extended locking nut 03 cooperates with the threaded column at the front end of the extension arm 3 to lock the suspension arm 4.

[0054] A suspension tube 42 and a suspension front end 41 are provided at both ends of the suspension arm 4. The suspension tube 42 is sleeved in the threaded column of the lifting rod 2 or the front end 31 of the extension arm.

[0055] The connector 5 includes two vertically arranged flipping portions 51 and a swinging portion 52. The swinging portion 52 is connected to the suspension front end 41 of the suspension arm 4, while the flipping portion 51 is connected to the fixed support 6. The swinging portion 52 is locked to the suspension arm 4 via the swinging locking nut 04, while the flipping portion 51 is locked to the fixed support 6 via the swinging locking nut 05. The swinging portion 52 is responsible for left-right position adjustment, while the flipping portion 51 is responsible for adapting to the tilt angle of the ablation needle 8 in the vertical plane.

[0056] See also Figure 7 The fixing brace 6 includes a brace seat 60, a fixing box 61 and a fixing cover 62. The fixing box 61 has a fixing groove 611 for embedding the ablation needle 8. The fixing cover 62 is flipped and connected to the top of the fixing box 61. When the fixing cover 62 is covered on the fixing box 61, the ablation needle 8 can be fixed.

[0057] The support base 60 is connected to the connector 5 by flipping the locking nut 05. The support base 60 is detachably connected to the fixing box 61. Because different manufacturers of ablation needles 8 have different product sizes and specifications, different ablation needles 8 have corresponding fixing boxes 61. Therefore, when replacing ablation needles 8, the fixing box 61 can be removed and replaced from the support base 60, allowing the fixing device to be compatible with ablation needles 8 from different manufacturers.

[0058] See also Figure 9, the surface of the fixed cover 62 facing the fixed groove 611 is provided with a flexible member 621 and a second lock hole 620, and the surface of the fixed box 61 is provided with a first lock hole 610. When the ablation needle 8 is placed in the fixed groove 611 and the fixed cover 62 is covered on the fixed box 61, a pin or other component is inserted into the first lock hole 610 and the second lock hole 620, so that the fixed cover 62 is firmly fastened to the fixed box 61, causing the flexible member 621 to deform, pressing the ablation needle 8 firmly into the fixed groove 611, and achieving the fixation of the ablation needle 8 by the brace.

[0059] See Figure 2 , a plurality of wire holders 7 are provided on the surfaces of the suspension arm 4 and the extension arm 3. The wire of the ablation needle 8 can pass through the wire holder 7 and be fixed to the surfaces of the suspension arm 4 and the extension arm 3, avoiding the dislocation of the ablation needle 8 caused by accidental collision and pulling during the operation.

[0060] Participate Figure 10 and Figure 11 , the wire holder 7 includes a fixed ring 71, a wire rotating shaft 72, a movable ring 73 and a fastener 74. One ends of the fixed ring 71 and the movable ring 73 are turned and moved through the wire rotating shaft 72. The fastener 74 is arranged at the opening at the other ends of the fixed ring 71 and the movable ring 73. A buckle groove 730 is provided on the movable ring 73. The fastener 74 is flip-connected to the fixed ring 71. When the fixed ring 71 and the movable ring 73 are closed, the fastener 74 is buckled into the buckle groove 730, and the fixed ring 71 and the movable ring 73 cannot be opened, completing the fixation of the wire of the ablation needle 8.

[0061] During the use of Embodiment 1, after the surgeon loosens all the bolts of the radiofrequency ablation needle fixing device, holds the fixed brace 6 part, and fixes the position of the ablation needle 8. After the positioning is completed, the assistant tightens all the bolts of the radiofrequency ablation needle fixing device, so that the fixing device maintains the spatial position of the ablation needle 8.

[0062] Embodiment 2:

[0063] See Figure 12 and Figure 13 As shown, in this embodiment, there is an opening in front of the fixed groove 611 (the fixed groove 611 is in a "匚" shape), and the ablation needle 8 can enter the fixed groove 611 through the opening. The side wall of the fixed groove 611 is provided with a fixed handle 612, and the rotation of the fixed handle can clamp and fix the ablation needle 8 in the fixed groove 611. [[ID=二十六]]

[0064] Since the ablation needle 8 can be placed through the opening in front of the fixed groove 611, during the operation, the ablation needle 8 can be taken out of the fixed brace 6 for operation. After the puncture and positioning are completed, the ablation needle 8 is fixed back into the fixing device again. The fixation of the ablation needle 8 is more flexible, and the surgeon can take out or fix the ablation needle 8 according to needs.

[0065] Example 3:

[0066] See also Figure 14 As shown, in this embodiment, a side of the connecting member 55 away from the suspension arm 44 is connected to a suspension bracket 53 , and an end of the suspension bracket 53 is rotatably connected to the support base 9 through a universal adjustment base 54 .

[0067] The support seat 9 includes a horizontal support 90, a vertical support 91 and a limit support 92. The horizontal support 90 is rotatably connected to the universal adjustment seat 54 through a universal ball rod 900 and can be locked. The vertical support 91 can be displaced back and forth along the length direction of the horizontal support 90 and can be locked. The limit support 92 can be displaced up and down along the length direction of the vertical support 91 and can be locked.

[0068] See also Figure 15 As shown, a movable groove 910 is provided in the vertical support 91 for the displacement of the limit support 92 , and a height adjustment button 93 is movably provided on the vertical support 91 , and the height adjustment button 93 is connected to the limit support 92 .

[0069] The vertical support 91 is specifically divided into a fixed part 920 and a rotating part 921. One end of the rotating part 921 is screwed to the fixed part 920. The fixed part 920 and the rotating part 921 together form a positioning groove 922 for the tail of the ablation needle 8 to be inserted. A slot 911 is provided above the vertical support 91 to expose the rotating part 921.

[0070] See also Figure 16 As shown here, this is the unlocking and locking method of the height adjustment button 93. The height adjustment button 93 is movably provided with a pressing portion 930, and part of the pressing portion 930 is located in the vertical support 91. At the same time, part of the pressing portion 930 is connected to the interior of the vertical support 91 through an elastic member 931; the side of the pressing portion 930 away from the elastic member 931 can be clamped and fixed to the interior of the vertical support 91, and corresponding card slots 912 are evenly spaced inside the vertical direction of the vertical support 91. The doctor can press or release the pressing portion 930 to temporarily disengage or clamp it in the card slot 912, thereby achieving the purpose of unlocking or locking in the vertical direction.

[0071] See also Figure 14 and 17 As shown, a guide rail 901 is provided in the horizontal support 90, and a translation button 94 is fixedly connected to one side of the vertical support 91. The translation button 94 is movably provided with a push button 940, a rotating wheel 941, and a limiting rod 942. The push button 940 and the limiting rod 942 are respectively engaged with the rotating wheel 941. The push button 940 is connected to the interior of the translation button 94 via an elastic block 943. The horizontal support 90 is provided with a plurality of limiting slots 902 adapted to the ends of the limiting rods 942. The doctor can press or release the push button 940 to drive the rotating wheel 941 to rotate, and drive the ends of the limiting rods 942 to disengage or enter the limiting slots 902, thereby unlocking or locking the horizontal direction.

[0072] See also Figure 14 and 18 As shown, the universal adjustment seat 54 is provided with a button 95, and the portion of the button 95 located on the universal adjustment seat 54 is connected to a locking portion 950. The locking portion 950 is connected to the interior of the universal adjustment seat 54 via a spring block 951. The doctor can press or release the button 95 to retract or release the spring block 951, thereby moving the locking portion 950 away from the universal ball bar 900 or restricting the movement of the universal ball bar 900, thereby achieving the purpose of unlocking or locking.

[0073] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A radiofrequency ablation needle fixing device, characterized by: It comprises a fixed base (1), a lifting rod (2), a suspension arm (4), a connecting piece (5) and a fixing bracket (6), The fixed base (1) can be connected to the operating table; The lifting rod (2) is connected to the fixed base (1), the upper part of the lifting rod (2) is a threaded column, the suspension arm (4) can be adjusted up and down along the lifting rod (2), and the lifting rod (2) is provided with two lifting nuts (02); A suspension tube (42) and a suspension front end (41) are provided at both ends of the suspension arm (4); the suspension tube (42) is sleeved on the lifting rod (2); and the lifting nut (02) clamps the upper and lower ends of the suspension tube (42) to lock the position of the suspension tube (42); The connecting member (5) includes two vertically arranged turning parts (51) and a swinging part (52), the swinging part (52) is connected to the suspension front end (41) of the suspension arm (4), the turning part (51) is connected to the fixing bracket (6), the swinging part (52) is locked to the suspension arm (4) through a swinging locking nut (04), and the turning part (51) is locked to the fixing bracket (6) through a turning locking nut (05); The fixing brace (6) can be detachably fixed to the ablation needle (8).

2. The radiofrequency ablation needle fixing device according to claim 1, characterized in that: It also includes an extension arm (3), wherein both ends of the extension arm (3) are respectively provided with an extension front end (31) and an extension tube (32), the extension tube (32) can be sleeved on the lifting rod (2), and the two lifting nuts (02) of the lifting rod (2) can clamp the extension tube (32) to control the height of the extension arm (3) relative to the lifting rod (2); The front end of the extension arm (3) is provided with a threaded column, the shape of the threaded column is the same as that of the lifting rod (2), the suspension arm (4) can be sleeved in the threaded column at the front end of the extension arm (3), the front end of the extension arm (3) is provided with an extension locking nut (03), and the extension locking nut (03) cooperates with the threaded column at the front end of the extension arm (3) to lock the suspension arm (4).

3. The radiofrequency ablation needle fixing device according to claim 1, characterized in that: The fixed base (1) comprises a slider seat (10), a lifting and tightening sleeve (12) and a tightening handle (13). The lifting and tightening sleeve (12) is fixed to the slider seat (10). The lifting rod (2) is sleeved in the lifting and tightening sleeve (12). The tightening handle (13) is tightened to control the inner diameter of the lifting and tightening sleeve (12) to increase or decrease.

4. The radiofrequency ablation needle fixing device according to claim 1, characterized in that: The fixing brace (6) comprises a brace seat (60) and a fixing box (61), wherein the fixing box (61) has a fixing groove (611) for embedding the ablation needle (8); the brace seat (60) is connected to the connecting member (5) by turning over the locking nut (05), and the brace seat (60) and the fixing box (61) are detachably connected.

5. The radiofrequency ablation needle fixing device according to claim 4, characterized in that: The fixing support (6) includes a fixing cover (62), which is flipped and connected to the top of the fixing box (61). When the fixing cover (62) is covered on the fixing box (61), the ablation needle (8) can be fixed. The surface of the fixing cover (62) facing the fixing groove (611) is provided with a flexible member (621). When the ablation needle (8) is placed in the fixing groove (611) and the fixing cover (62) is covered on the fixing box (61), the flexible member (621) firmly presses the ablation needle (8) down into the fixing groove (611).

6. The radiofrequency ablation needle fixing device according to claim 4, characterized in that: The fixing groove (611) has an opening in front, and the ablation needle (8) can enter the fixing groove (611) through the opening. The side wall of the fixing groove (611) has a fixing handle (612), and the fixing handle can be rotated to clamp the ablation needle (8) in the fixing groove (611).

7. The radiofrequency ablation needle fixing device according to claim 1 or 2, characterized in that: The invention also includes a wire holder (7) for the ablation needle (8) wire to pass through, wherein the wire holder (7) is arranged on the surface of the suspension arm (4) or the extension arm (3), and the wire holder (7) includes a fixed ring (71) and a movable ring (73), and one end of the fixed ring (71) and the movable ring (73) can be flipped and moved through the wire rotating shaft (72).

8. The radiofrequency ablation needle fixing device according to claim 6, characterized in that: A fastener (74) is provided at the other end opening of the fixed ring (71) and the movable ring (73), and a buckle groove (730) is provided on the fixed ring (71) or the movable ring (73). When the fixed ring (71) and the movable ring (73) are closed, the fastener (74) is buckled into the buckle groove (730), and the fixed ring (71) and the movable ring (73) cannot be opened.

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