Ablation device

Abstract

The utility model relates to the technical field of medical apparatuses and instruments, and provides an ablation device which comprises an operating mechanism, a needle feeding mechanism, a needle feeding mechanism and an ablation device. A catheter, the proximal end of which is disposed in the operating support body; the hollow ablation needle is movably arranged in the needle inlet tube, the operation supporting body and the catheter in a penetrating mode, the far end of the hollow ablation needle can stretch out of the catheter or retract into the catheter, an axially-through needle passage is formed in the hollow ablation needle, and the hollow ablation needle can conduct ablation operation and needle biopsy and collect biopsy tissue through the needle passage; the hollow ablation needle is detachably connected with the needle inlet tube through the detachable assembly so that the hollow ablation needle can be separated from the operating mechanism and the catheter, and the ablation device has the ablation treatment function and the biopsy function and is simple in structure and convenient to disassemble and assemble.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to an ablation device. Background Art

[0002] With the aging population and changing lifestyles, prostate diseases, particularly benign prostatic hyperplasia (BPH) and prostate cancer, are becoming increasingly common. Histologically, the incidence of BPH increases with age. Prostate enlargement with aging has become a significant health concern for men. While traditional treatments, such as medication and surgery, can alleviate the condition to some extent, they are associated with significant side effects, high recurrence rates, and slow postoperative recovery.

[0003] Existing minimally invasive prostate treatments primarily include microwave ablation, radiofrequency ablation, cryoablation, and thermal steam ablation. However, these treatments also carry certain side effects, such as urethral damage, urethral stricture, and severe postoperative pain. Generally speaking, existing ablation devices for prostate and other organ therapies typically offer only a single ablation function. Utility Model Content

[0004] In view of this, the present application provides an ablation device to solve the technical problem of single function of ablation devices in the prior art.

[0005] The present application provides an ablation device, comprising:

[0006] The operating mechanism comprises an operating support body and a needle insertion tube provided on the operating support body;

[0007] a catheter, a proximal end of the catheter being disposed in the operation support body;

[0008] A hollow ablation needle, wherein the hollow ablation needle is movably disposed through the needle insertion tube, the operation support body, and the catheter, and the distal end of the hollow ablation needle is capable of extending out of or retracting into the catheter. The hollow ablation needle has an axially extending needle tract defined therein, and the hollow ablation needle is capable of performing ablation operations and puncture biopsies and collecting biopsy tissue through the needle tract;

[0009] A detachable component, through which the hollow ablation needle is detachably connected to the needle insertion tube, so that the hollow ablation needle can be separated from the operating mechanism and the catheter.

[0010] In the ablation device provided in the present application, since the hollow ablation needle can perform ablation operations and puncture biopsy and collect biopsy tissue through the needle tract, and a detachable component is provided, the hollow ablation needle is detachably connected to the needle insertion tube through the detachable component, so that the hollow ablation needle can be separated from the operating mechanism and the catheter, so that the ablation device can have both ablation treatment and biopsy functions through the same hollow ablation needle, and the hollow ablation needle is detachably connected to the needle insertion tube through the detachable component, thereby realizing a detachable connection with the operating support body, so that the structure of the entire device is very streamlined and very convenient to install and disassemble.

[0011] Furthermore, the detachable component includes a hollow scale column and a locking sleeve, the distal end of the hollow scale column is movably limited along the axial direction of the needle insertion tube in the needle insertion tube, the locking sleeve is movably sleeved on the hollow scale column and can be detachably connected to the hollow scale column and the needle insertion tube to lock the hollow scale column, the ablation device also includes a needle handle, the hollow ablation needle is connected to the needle handle, and the needle handle is interference fit with the proximal end of the scale column so that the hollow ablation needle is detachably connected to the scale column.

[0012] Among them, by setting the needle insertion tube, the hollow scale column and the locking sleeve, the locking sleeve can be movably mounted on the hollow scale column and can be detachably connected to the hollow scale column and the needle insertion tube to lock the hollow scale column, and can also unlock the hollow scale column, so as to facilitate locking or unlocking the hollow ablation needle as needed, and also facilitate direct observation of the needle insertion depth with the naked eye without the need for detection by the monitoring module, especially in the biopsy stage, and can also improve the efficiency of biopsy.

[0013] Furthermore, the prostate ablation device also includes an electrical connection component, which includes a first electrode ring and a second electrode ring. The first electrode ring is fixedly arranged in the hollow scale column, and the second electrode ring is arranged on the needle handle. When the needle handle is inserted into the hollow scale column and has an interference fit with the inner wall of the hollow scale column, the second electrode ring is located between the inner wall of the hollow scale column and the first electrode ring, and is electrically connected to the first electrode ring by interference fit. The second electrode ring can be electrically connected to an external ablation energy generating device.

[0014] Among them, electrical connection is achieved by interference fit between the first electrode ring and the second electrode ring, which facilitates rapid electrical connection and rapid release of electrical connection. Since the second electrode ring is electrically connected to the ablation control module, and the hollow ablation needle is connected to the needle handle and the second electrode ring is arranged on the needle handle, and the second electrode ring can be electrically connected to an external ablation energy generating device, it is convenient for the hollow ablation needle to implement radiofrequency ablation, pulse ablation and other electrified ablation types.

[0015] Furthermore, the ablation device includes a needle handle connector connected to the needle handle, and the needle handle connector is communicated with a port at the proximal end of the hollow ablation needle.

[0016] Among them, the needle handle connector facilitates the connection of the hollow ablation needle with equipment components such as the negative pressure device and the injection assembly, so as to perform negative pressure suction of biopsy tissue, delivery of biopsy tissue, and chemical ablation treatment.

[0017] Furthermore, a long groove and a plurality of circumferential annular grooves are formed on the outer wall surface of the hollow scale column, the plurality of circumferential annular grooves are arranged at intervals along the axial direction of the hollow scale column, the long grooves are arranged along the axial extension of the hollow scale column, the long grooves are communicated with the plurality of circumferential annular grooves, and a locking protrusion is formed on the inner wall of the locking sleeve, when the locking protrusion is located in the circumferential annular groove, it is locked and fixed with the circumferential annular groove so that the locking sleeve and the hollow scale column are locked and fixed, and when the locking protrusion is located in the long groove, the locking sleeve and the hollow scale column are unlocked.

[0018] Among them, the long grooves and multiple circumferential grooves on the outer wall of the hollow scale column are very easy to process, and the locking protrusions formed on the inner wall of the locking sleeve are also a streamlined structure that is easy to process. Through the coordination of these streamlined structures, it is convenient to operate the locking sleeve and the hollow scale column to lock and unlock.

[0019] Furthermore, an internal thread is formed on the inner side of the locking sleeve, and an external thread is formed on the outer side of the needle insertion tube. The locking sleeve is detachably connected to the outer side of the needle insertion tube through the cooperation of the internal thread and the external thread.

[0020] The locking sleeve is detachably connected to the outer side of the needle insertion tube through the cooperation of the internal thread and the external thread, so that the connection and disassembly of the locking sleeve and the outer side of the needle insertion tube are very convenient.

[0021] Furthermore, the locking sleeve includes a first segment and a second segment, the inner diameter of the first segment is larger than the outer diameter of the needle tube, the internal thread is located in the first segment, and the engaging protrusion is provided on the inner wall of the second segment.

[0022] Among them, the locking sleeve is divided into two sections of different sizes (a first section and a second section, the inner diameter of the first section is larger than the outer diameter of the needle tube), so that the structure of the locking sleeve can be well adapted to the corresponding connection with the needle tube and the hollow scale column.

[0023] Furthermore, the ablation device includes a negative pressure device, which is used to connect to the port at the proximal end of the hollow ablation needle.

[0024] Among them, since the ablation device is provided with a negative pressure device for connecting to the proximal port of the hollow ablation needle, the hollow ablation needle can absorb and transport the biopsy tissue through its own needle tract by adopting a simple and efficient method of negative pressure suction.

[0025] Furthermore, the catheter has a needle exit cavity extending along the length direction of the catheter, and a needle exit hole connected to the needle exit cavity is provided on the circumferential side wall of the distal end of the catheter. The hollow ablation needle is inserted into the needle exit cavity and can be extended out of or retracted into the catheter through the needle exit hole.

[0026] Furthermore, the ablation device further includes a non-detachable ablation needle, which is fixed to the operating mechanism and passed through the catheter. The non-detachable ablation needle and the hollow ablation needle are evenly arranged along the circumference of the catheter.

[0027] Among them, a non-detachable ablation needle is added on the basis of the hollow ablation needle, which improves the diversity of the ablation needles in the ablation device and the clear division of the functions of the ablation needles. In addition, multiple non-detachable ablation needles and hollow ablation needles are evenly arranged along the circumference of the catheter. Compared with the traditional biopsy ablation needle that is detachably inserted into the non-detachable ablation sheath, this makes the non-detachable ablation needle and the hollow ablation needle more independent of each other and do not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a three-dimensional view of the ablation device in the prostate ablation system of the present application, wherein the ablation needle does not extend out of the needle lumen;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0032] Figure 4 A cross-sectional view of a catheter in an ablation device in a prostate ablation system of the present application;

[0033] Figure 5 This is a partial perspective view of the ablation device in the prostate ablation system of the present application, omitting the catheter;

[0034] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0035] Figure 7 A perspective view of the ablation device in the prostate ablation system of the present application, wherein the ablation needle extends out of the needle lumen;

[0036] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0037] Description of Figure Numbers:

[0038] 6-hollow ablation needle; 7-non-detachable ablation needle; 17-first electrode ring; 18-second electrode ring; 19-information storage module; 20-positioning balloon; 100-catheter; 101-needle outlet cavity; 200-operating mechanism; 201-operating support body; 211-needle inlet tube; 212-urinary catheter port; 214-gas injection tube port; 213-detachable joint; 300-inclined guide tube; 400-detachable component; 401-hollow scale column; 402-locking sleeve; 403-needle handle; 404-long groove; 405-circumferential ring groove; 406-first segment; 407-second segment; 408-needle handle joint. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings provide exemplary embodiments of the present application to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that the present application can be implemented in a variety of different forms and is not limited to the embodiments described below.

[0040] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if there are terms such as "up", "down", "left", "right", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, scheme B, or schemes in which A and B are satisfied at the same time.

[0042] It should be noted that the ablation devices in the prior art for prostate treatment or other organ treatment usually only have ablation treatment functions and are single in function. However, in the ablation device provided in the present application, a hollow ablation needle and a detachable component are provided, which can perform ablation operations and puncture biopsies and collect biopsy tissues through the needle tract. The hollow ablation needle is detachably connected to the needle insertion tube through the detachable component so that the hollow ablation needle can be separated from the operating mechanism and the catheter, so that the ablation device can have both ablation treatment and biopsy functions through the same hollow ablation needle, thereby improving the functional diversity of the ablation device.

[0043] See also Figure 1 、 Figure 2 、 Figure 7 and Figure 8 The present invention provides an ablation device, which is particularly suitable for ablation treatment of the prostate, but can also be used for ablation treatment of any other suitable organ, including:

[0044] The operating mechanism 200 includes an operating support body 201 and a needle insertion tube 211 disposed on the operating support body 201;

[0045] The catheter 100, the proximal end of the catheter 100 is disposed in the operation support body 201;

[0046] The hollow ablation needle 6 is movably disposed through the needle insertion tube 211, the operation support body 201, and the catheter 100, and the distal end of the hollow ablation needle 6 can extend out of the catheter 100 or retract into the catheter 100. The hollow ablation needle 6 has an axially extending needle tract defined therein, and the hollow ablation needle 6 is capable of performing ablation operations and puncture biopsies and collecting biopsy tissue through the needle tract;

[0047] Detachable component: the hollow ablation needle 6 is detachably connected to the needle insertion tube 211 through the detachable component 400 , so that the hollow ablation needle 6 can be separated from the operating mechanism 200 and the catheter 100 .

[0048] In the ablation device provided in the embodiment of the present application, the hollow ablation needle 6 can perform ablation operations and puncture biopsy and collect biopsy tissue through the needle tract, and a detachable component is provided. The hollow ablation needle 6 is detachably connected to the needle insertion tube 211 through the detachable component 400, so that the hollow ablation needle 6 can be separated from the operating mechanism 200 and the catheter 100, so that the ablation device can have both ablation treatment and biopsy functions through the same hollow ablation needle 6, and the structure is very simple and very convenient to assemble and disassemble.

[0049] According to one embodiment of the present application, the catheter 100 has a needle exit lumen 101 extending along the length direction of the catheter 100, and a needle exit hole connected to the needle exit lumen 101 is provided on the circumferential side wall of the distal end of the catheter 100. The hollow ablation needle 6 is inserted into the needle exit lumen 101 and can be extended or retracted into the catheter 100 through the needle exit hole.

[0050] According to one embodiment of the present application, the operating support body 201 is a support shell, and the proximal end of the catheter 100 can be connected to the support shell through a detachable joint 213. The detachable joint 213 can also be provided with a functional structure such as a urinary catheter port 212. The support shell is preferably in the shape of a handle, such as a gun-shaped handle, etc. The distal end of the catheter 100 can be connected to the positioning balloon 20, and the detachable joint 213 can also be provided with an air injection port 214. The air injection port 214 is connected to the positioning balloon 20 through the airway or trachea of the catheter 100. When the positioning balloon 20 completely enters the bladder, ventilation through the air injection port 214 can inflate the positioning balloon 20. In this way, on the one hand, the positioning balloon 20 can be stuck at the neck of the prostate, so that the catheter 100 is positioned; on the other hand, when the positioning balloon 20 is stuck at the neck of the prostate, it can block the urethral opening, so that urine does not flow out of the urethra, so that the catheter 100 is introduced into the urinary catheter hole at the distal end of the catheter 100 and finally flows out from the urinary catheter port 212, thereby reducing the impact of urine on treatment.

[0051] See also Figure 3 According to one embodiment of the present application, the detachable assembly 400 includes a hollow scale column 401 and a locking sleeve 402. The distal end of the hollow scale column 401 is movably limited along the axial direction of the needle tube 211 and is disposed in the needle tube 211. The locking sleeve 402 is movably sleeved on the hollow scale column 401 and can be detachably connected to the hollow scale column 401 and the needle tube 211 to lock the hollow scale column 401. The prostate ablation system also includes a needle handle. 403, the hollow ablation needle 6 is connected to the needle handle 403, and the needle handle 403 and the proximal end of the hollow scale column 401 are interference fit to make the hollow ablation needle 6 and the hollow scale column 401 detachable. The scale on the hollow scale column 401 can make it possible to intuitively obtain and control the insertion depth of the hollow ablation needle 6 at the operating end. When the locking sleeve 402 does not lock the hollow scale column 401, the hollow ablation needle 6 can be manually pulled to advance and withdraw the needle.

[0052] See also Figure 3 Furthermore, the prostate ablation device also includes an electrical connection component, which includes a first electrode ring 17 and a second electrode ring 18. The first electrode ring 17 is fixedly arranged in the hollow scale column 401, and the second electrode ring 18 is arranged on the needle handle 403. When the needle handle 403 is inserted into the hollow scale column 401 and has an interference fit with the inner wall of the hollow scale column 401, the second electrode ring 18 is located between the inner wall of the hollow scale column 401 and the first electrode ring 17, and is electrically connected to the first electrode ring 17 by interference fit. The second electrode ring 18 can be electrically connected to an external ablation energy generating device to implement electrified ablation such as radiofrequency ablation and pulse ablation.

[0053] See also Figure 3 According to one embodiment of the present application, a long groove 404 and a plurality of circumferential annular grooves 405 are formed on the outer wall surface of the hollow scale column 401. The plurality of circumferential annular grooves 405 are arranged at intervals along the axial direction of the hollow scale column 401. The long grooves 404 are arranged to extend along the axial direction of the hollow scale column 401. The long grooves 404 are connected to the plurality of circumferential annular grooves 405. A locking protrusion (not shown) is formed on the inner wall of the locking sleeve 402. When the locking protrusion is located in the circumferential annular groove 405, it is locked and fixed with the circumferential annular groove 405 to lock the locking sleeve 402 and the hollow scale column 401. When the locking protrusion is located in the long groove 404, the locking sleeve 402 and the hollow scale column 401 are unlocked.

[0054] As another embodiment, the locking sleeve 402 and the hollow scale column 401 may also be connected by threads to achieve locking and unlocking.

[0055] See also Figure 3 According to a preferred embodiment of the present application, locking sleeve 402 includes a first segment 406 and a second segment 407. The inner diameter of first segment 406 is larger than the outer diameter of needle tube 211. An internal thread is formed on the inner side of first segment 406, and a locking protrusion is provided on the inner wall of second segment 407. The outer side of needle tube 211 is formed with an external thread. Locking sleeve 402 is detachably connected to the outer side of needle tube 211 through the mating of the internal and external threads, with the internal threads located in first segment 406. This design of locking sleeve 402 effectively connects it to needle tube 211 and hollow graduated column 401.

[0056] It should be noted that when the second segment 407 and the hollow scale column 401 are limited by the locking protrusion, the inner diameters of the first segment 406 and the second segment 407 can be equal or different, which depends on the protruding height of the locking protrusion. If the second segment 407 and the outer wall of the hollow scale column 401 are threadedly connected, the inner diameter of the first segment 406 needs to be larger than the outer diameter of the needle tube 211 and the inner diameter of the second segment 407.

[0057] See also Figure 3 According to one embodiment of the present application, the ablation device includes a needle handle connector 408 connected to the needle handle 403, and the needle handle connector 408 is connected to the port at the proximal end of the hollow ablation needle 6. The needle handle connector 408 is preferably a Luer connector. The ablation device may also include a negative pressure device, which is used to connect the port at the proximal end of the hollow ablation needle 6, and can be specifically detachably connected and connected to the needle handle connector 408. The negative pressure device can be a suction device that can generate negative pressure, which provides negative pressure to enable the hollow ablation needle 6 to absorb biopsy tissue and transport biopsy tissue through its own needle tract. The needle handle connector 408 can also be connected to the injection assembly to deliver chemical ablative agents such as ethanol (alcohol) to the hollow ablation needle 6, thereby delivering them to the organ to be treated for chemical ablation treatment.

[0058] As another embodiment, instead of using a negative pressure module to suck out the biopsy tissue, a guide wire may be used to remove the biopsy tissue in the hollow ablation needle 6 .

[0059] See also Figure 4 In addition, the ablation device also includes a non-detachable ablation needle 7, which is fixed to the operating mechanism and inserted into the catheter. The non-detachable ablation needle 7 and the hollow ablation needle 6 are evenly arranged along the circumference of the catheter 100. Preferably, there can be multiple non-detachable ablation needles 7, and the multiple non-detachable ablation needles 7 and the hollow ablation needle 6 are evenly arranged along the circumference of the catheter 100. Compared with the traditional solution in which the biopsy ablation needle is detachably inserted into the non-detachable ablation sheath, this makes the non-detachable ablation needle 7 and the hollow ablation needle 6 more independent of each other and do not interfere with each other.

[0060] The above description is only a preferred specific implementation method of the present invention. The protection scope of the present invention is not limited to the embodiments listed above. Any simple change or equivalent replacement of the technical solution that can be obviously obtained by any technician familiar with this technical field within the technical scope disclosed in the present invention falls within the protection scope of the present invention.

Claims

1. An ablation device, characterized in that: include: The operating mechanism comprises an operating support body and a needle insertion tube provided on the operating support body; a catheter, a proximal end of the catheter being disposed in the operation support body; A hollow ablation needle, wherein the hollow ablation needle is movably disposed through the needle insertion tube, the operation support body, and the catheter, and the distal end of the hollow ablation needle is capable of extending out of or retracting into the catheter. The hollow ablation needle has an axially extending needle tract defined therein, and the hollow ablation needle is capable of performing ablation operations and puncture biopsies and collecting biopsy tissue through the needle tract; A detachable component, through which the hollow ablation needle is detachably connected to the needle insertion tube, so that the hollow ablation needle can be separated from the operating mechanism and the catheter.

2. The ablation device according to claim 1, characterized in that The detachable component includes a hollow scale column and a locking sleeve. The distal end of the hollow scale column is movably limited along the axial direction of the needle insertion tube in the needle insertion tube. The locking sleeve is movably sleeved on the hollow scale column and can be detachably connected to the hollow scale column and the needle insertion tube to lock the hollow scale column. The ablation device also includes a needle handle. The hollow ablation needle is connected to the needle handle. The needle handle is interference fit with the proximal end of the scale column to make the hollow ablation needle detachably connected to the scale column.

3. The ablation device according to claim 2, characterized in that The prostate ablation device also includes an electrical connection component, which includes a first electrode ring and a second electrode ring. The first electrode ring is fixedly arranged in the hollow scale column, and the second electrode ring is arranged on the needle handle. When the needle handle is inserted into the hollow scale column and has an interference fit with the inner wall of the hollow scale column, the second electrode ring is located between the inner wall of the hollow scale column and the first electrode ring, and is electrically connected to the first electrode ring through an interference fit. The second electrode ring can be electrically connected to an external ablation energy generating device.

4. The ablation device according to claim 2, characterized in that The ablation device includes a needle shaft connector connected to the needle shaft, and the needle shaft connector is communicated with a port at the proximal end of the hollow ablation needle.

5. The ablation device according to claim 2, wherein: A long groove and a plurality of circumferential annular grooves are formed on the outer wall surface of the hollow scale column. The plurality of circumferential annular grooves are arranged at intervals along the axial direction of the hollow scale column. The long groove is arranged along the axial extension of the hollow scale column. The long groove is communicated with the plurality of circumferential annular grooves. A locking protrusion is formed on the inner wall of the locking sleeve. When the locking protrusion is located in the circumferential annular groove, it is locked and fixed with the circumferential annular groove so that the locking sleeve and the hollow scale column are locked and fixed. When the locking protrusion is located in the long groove, the locking sleeve and the hollow scale column are unlocked.

6. The ablation device according to claim 5, characterized in that An internal thread is formed on the inner side of the locking sleeve, and an external thread is formed on the outer side of the needle insertion tube. The locking sleeve is detachably connected to the outer side of the needle insertion tube through the cooperation of the internal thread and the external thread.

7. The ablation device according to claim 6, characterized in that: The locking sleeve includes a first segment and a second segment. The inner diameter of the first segment is larger than the outer diameter of the needle tube. The internal thread is located in the first segment. The engaging protrusion is provided on the inner wall of the second segment.

8. The ablation device according to any one of claims 1 to 7, characterized in that: The ablation device includes a negative pressure device, which is used to connect to the port at the proximal end of the hollow ablation needle.

9. The ablation device according to any one of claims 1 to 7, characterized in that: The catheter has a needle exit cavity extending along the length of the catheter, and a needle exit hole connected to the needle exit cavity is provided on the circumferential side wall of the distal end of the catheter. The hollow ablation needle is inserted into the needle exit cavity and can extend out of or retract into the catheter through the needle exit hole.

10. The ablation device according to any one of claims 1 to 7, characterized in that: The ablation device further includes a non-detachable ablation needle, which is fixed to the operating mechanism and passes through the catheter. The non-detachable ablation needle and the hollow ablation needle are evenly arranged along the circumference of the catheter.

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