Ablation device and biopsy ablation device

Abstract

The application discloses an ablation device and biopsy ablation device, which comprises an outer sleeve, an ablation needle and an ablation handle, the rear end of the ablation needle is provided with an ablation tip, the rear end of the outer sleeve is provided with a sleeve tip, a first connecting part is arranged on the ablation tip, a second connecting part is arranged on the sleeve tip, when the first connecting part cooperates with the second connecting part, the ablation needle is located in the outer sleeve and is in sliding cooperation with the outer sleeve; a first lead wire is arranged in the ablation handle, a third connecting part is arranged on the ablation handle, the first connecting part cooperates with the second connecting part; when the first connecting part is connected with the third connecting part, the first lead wire is in lead connection with the ablation needle. The ablation device and biopsy ablation device can adapt to the actual needs in the tumor treatment process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, in particular to an ablation device and a biopsy ablation device. BACKGROUND

[0002] With the continuous development of medical technology, more and more in-vivo lesions begin to be treated by ablation technology, and in the treatment process, corresponding ablation needles are used to remove lesions with less damage. Especially for tumor treatment, ablation therapy is a common treatment method in tumor treatment, which can cause tumor cells to necrosis by temperature, chemical and other methods.

[0003] Temperature ablation can be divided into cold field or hot field ablation, which can cause tumor cells to dehydrate and form ice crystals, or cause tumor to coagulate and necrosis. However, due to the influence of heat conduction, the above ablation methods can easily affect the surrounding tissues and cause damage to the surrounding normal tissues, especially when there are blood vessels or nerves around, which greatly increases the risk of surgery.

[0004] Therefore, an electric field pulse ablation has been developed, which can form a high-voltage electric field pulse in the ablation area and pierce the cell membrane to cause tumor cell necrosis. This ablation method can avoid all the defects of temperature ablation, so its effect is very obvious.

[0005] However, in the clinical treatment process, the specific scene of ablation is various, but the existing ablation device has single function and cannot meet the requirements of clinical multifunction. SUMMARY

[0006] The purpose of the present application is to provide an ablation device and a biopsy ablation device, which can meet the actual needs in the process of tumor treatment.

[0007] The present application provides an ablation device, which comprises an outer sleeve, an ablation needle, an ablation handle,

[0008] The rear end of the ablation needle is provided with an ablation tip, the rear end of the outer sleeve is provided with a sleeve tip, the ablation tip is provided with a first connecting part, the sleeve tip is provided with a second connecting part, and when the first connecting part cooperates with the second connecting part, the ablation needle is located in the outer sleeve and is in sliding cooperation with the outer sleeve.

[0009] A first lead wire is arranged in the ablation handle, a third connecting part is arranged on the ablation handle, and the first connecting part cooperates with the second connecting part; when the first connecting part is connected with the third connecting part, the first lead wire is connected with the ablation needle.

[0010] In one of the embodiments, at least two snap protrusions are provided on the ablation tip, and the first connecting part is the snap protrusion; at least two snap recesses are provided on the ablation handle, and the third connecting part is the snap recess, and the snap protrusion and the snap recess are matched.

[0011] In one of the embodiments, a positioning head is provided at the rear end of the ablation tip, the snap protrusion is provided at the front end of the positioning head, an insertion port is provided at the front end of the ablation handle, the positioning head corresponds to the insertion port, and the snap recess is provided outside the insertion port.

[0012] The application further provides a biopsy and ablation device, which comprises an extraction needle and the ablation device as described above, a fourth connecting part is provided at the rear end of the extraction handle, and the first connecting part is detachably connected with the fourth connecting part.

[0013] In one of the embodiments, at least two snap protrusions are provided on the ablation tip, and the first connecting part is the snap protrusion; at least two snap recesses are provided on the extraction handle, and the third connecting part is the snap recess, and the snap protrusion and the snap recess are matched.

[0014] In one of the embodiments, a channel is formed in the extraction needle, the front end of the channel is closed, the channel is located at the rear end of the extraction recess, and a heating element is provided in the channel; or, a channel is formed in the extraction needle, the front end of the channel is closed, the channel is located at the rear end of the extraction recess, a first fluid passage is formed in the channel, a second fluid passage is formed between the channel and the ablation needle, and the first fluid passage and the second fluid passage are communicated through the front end of the channel.

[0015] In one of the embodiments, a positioning head is provided at the rear end of the ablation tip, the snap protrusion is provided at the front end of the positioning head, an insertion port is provided at the front end of the extraction handle, the positioning head corresponds to the insertion port, and the snap recess is provided outside the insertion port.

[0016] In one of the embodiments, the front end of the extraction needle has an extraction tip, an extraction recess is provided on the extraction needle, the extraction recess is located at the rear side of the front end, and the outer sleeve pipe closes or opens the extraction recess when the extraction needle is slidably matched with the outer sleeve pipe.

[0017] In one of the embodiments, a front cover is provided at the front end of the extraction handle, the front cover is movably connected to the front end of the extraction handle through a hinge shaft, and the front cover is used to cover the ablation tip when the ablation tip is connected with the extraction handle.

[0018] In one of the embodiments, the extraction handle comprises an outer shell, a sliding member, an elastic member and an upper charging member, the sliding member is installed in the outer shell and can slide relative to the outer shell, the extraction needle is fixed to the sliding member and the upper charging member, the elastic member is arranged between the sliding member and the outer shell, a locking portion is arranged in the longitudinal sliding direction of the sliding member and the outer shell, and an unlocking portion is arranged on the upper charging member and corresponds to the locking portion.

[0019] In one of the embodiments, the outer shell comprises an upper shell and a seat, the upper shell is fixedly connected to the seat, an elastic locking member is arranged on the seat, the elastic locking member has a locking platform, an unlocking slope and a guide slope, the sliding member is provided with a locking portion, a sliding sheet and a needle connecting portion, the locking portion corresponds to the unlocking slope and the locking platform, when the locking portion is matched with the locking platform, the sliding member is locked, and when the unlocking portion is matched with the unlocking slope, the sliding member is unlocked.

[0020] In one of the embodiments, a first adjusting screw thread is arranged on the outer wall of the ablation end, a sleeve end is arranged on the extraction handle, a second adjusting screw thread is arranged on the inner wall of the sleeve end, and the first adjusting screw thread is matched with the second adjusting screw thread, or a plurality of buckle gaps are longitudinally arranged on the outer wall of the ablation end, and a clamping convex is arranged on the inner wall of the extraction handle and matched with the buckle gap.

[0021] The technical scheme provided by the present application has the following advantages and effects:

[0022] The ablation device comprises an outer sleeve, an ablation needle and an ablation handle, the ablation handle is connected to the ablation end of the ablation needle, so that the power supply of the ablation needle is turned on, when the sleeve end of the outer sleeve at the rear end is matched with the ablation end of the ablation needle at the rear end, the outer sleeve is sleeved on the ablation needle, the ablation operation on the human body tissue (such as tumor) can be performed through the ablation needle, on the other hand, in addition to being used for ablation operation, the outer sleeve can also be used in other occasions (such as being matched with the extraction needle for biopsy), the ablation device has more functions and can adapt to the actual needs of the clinic. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an exploded view of the biopsy ablation device in the embodiment one of the present application;

[0024] Figure 2 is an appearance view of the biopsy ablation device in the embodiment one of the present application;

[0025] Figure 3 is a sectional view of the biopsy ablation device in the embodiment one of the present application;

[0026] Figure 4is a sectional view of the first structure of the sleeve end head in the embodiment one of the present application;

[0027] Figure 5 is an end view of the first structure of the sleeve end head in the embodiment one of the present application;

[0028] Figure 6 is an outline view of the first structure of the ablation end head in the embodiment one of the present application;

[0029] Figure 7 is a sectional view of the second structure of the sleeve end head in the embodiment one of the present application;

[0030] Figure 8 is an end view of the second structure of the sleeve end head in the embodiment one of the present application;

[0031] Figure 9 is a first partial sectional view of Figure 2 ;

[0032] Figure 10 is a second partial sectional view of Figure 2 ;

[0033] Figure 11 is a third partial sectional view of Figure 2 ;

[0034] Figure 12 is a side view of the seat body in the embodiment one of the present application;

[0035] Figure 13 is a partial enlarged view of Figure 12 ;

[0036] Figure 14 is a top view of the sliding member in the embodiment one of the present application;

[0037] Figure 15 is a bottom view of the sliding member in the embodiment one of the present application;

[0038] Figure 16 is a first use state view in the embodiment one of the present application;

[0039] Figure 17 is a second use state view in the embodiment one of the present application;

[0040] Figure 18 is an exploded view of the biopsy ablation device in the embodiment two of the present application;

[0041] Figure 19 is a sectional view of the ablation needle and the outer sleeve cooperation part in the embodiment two of the present application;

[0042] Figure 20is the exploded view of the biopsy ablation device in the third embodiment of the present application;

[0043] Figure 21 is the sectional view of the ablation needle and the outer sleeve at the joint in the third embodiment of the present application;

[0044] Figure 22 is the sectional view of the ablation needle and the outer sleeve at the joint in the fourth embodiment of the present application;

[0045] Figure 23 is the exploded view of the biopsy ablation device in the fifth embodiment of the present application;

[0046] Figure 24 is the sectional view of the ablation needle and the outer sleeve at the joint in the fifth embodiment of the present application;

[0047] Figure 25 is the sectional view of the ablation needle and the outer sleeve at the joint in the sixth embodiment of the present application;

[0048] BRIEF DESCRIPTION OF DRAWINGS

[0049] 11, extraction needle, 12, extraction handle, 13, extraction tip, 14, extraction recess, 15, channel, 151, first fluid passage, 152, second fluid passage, 153, heating element, 155, through tube; 156, temperature measuring element,

[0050] 21, outer sleeve, 22, sleeve tip,

[0051] 31, ablation needle, 321, ablation handle, 3211, front handle, 3212, rear handle, 3213, handle head, 322, ablation tip, 325, insulating film layer, 326, conductive segment,

[0052] 411, buckle protrusion, 412, buckle recess,

[0053] 51, outer housing, 511, upper housing, 501, annular ear, 502, front cover, 503, hinge shaft, 52, seat body, 53, elastic member, 54, upper chamber member, 541, unlocking portion, 542, pull handle, 55, locking portion, 56, sliding member,

[0054] 61, positioning head, 62, insertion opening,

[0055] 71, first adjusting thread, 72, second adjusting thread, 73, buckle recess, 74, buckle protrusion,

[0056] 81, first lead wire, 82, second lead wire, 831, first lead body, 832, second lead body, 833, fixing head, 84, air guide tube,

[0057] 831. Resilient locking element; 8312. Locking platform; 8313. Unlocking ramp; 8314. Guide ramp.

[0058] 852. Sliding plate; 853. Needle body connecting part. Detailed Implementation

[0059] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0060] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0061] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0062] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0063] Example 1

[0064] like Figures 1 to 18 As shown, the biopsy ablation device includes an extraction needle 11, an outer cannula 21, an ablation needle 31, and an ablation handle 321. The rear end of the ablation needle 31 has an ablation tip 322, and the rear end of the outer cannula 21 has a cannula tip 22. The ablation tip 322 has a first connecting portion, and the cannula tip 22 has a second connecting portion. When the ablation tip 322 is connected to the cannula tip 22, the ablation needle 31 is located inside the outer cannula 21 and slides within it. A first conductive wire 81 is provided inside the ablation handle 321, and the front end of the first conductive wire 81 has… A first guide body 831 and a second guide body 832 are provided. The first guide body 831 is located at the front end of the ablation handle 321. The second guide body 832 is connected to the middle of the ablation handle 321 through a fixing head 833. The first guide wire 81 is located at the rear end of the ablation handle 321. The ablation handle 321 adopts a segmented structure, which includes a front handle 3211 and a rear handle 3212. The segmented structure facilitates the installation of the second guide body 832 inside. The front end of the front handle 3211 is provided with a handle head 3213, and an insertion port 62 is formed inside the handle head 3213.

[0065] A third connecting part is provided on the ablation handle 321. When the first connecting part is connected to the third connecting part, the first conductive wire 81 is connected to the ablation needle 31. An extraction handle 12 is provided at the rear end of the extraction needle 11. A fourth connecting part is provided on the extraction handle 12. The first connecting part can be detachably connected to the fourth connecting part.

[0066] Two buckle protrusions 411 are arranged on the ablation tip 322, the first connecting part is the buckle protrusion 411, two buckle recesses 412 are arranged on the ablation handle 321, the second connecting part is the buckle recess 412, the buckle protrusion 411 on the ablation tip 322 is matched with the buckle recess 412. Through the structure, detachable connection between the ablation tip 322 and the sleeve tip 22 and the extraction handle 12 is realized.

[0067] The ablation device includes an outer sleeve 21, an ablation needle 31 and an ablation handle 321, a first lead wire 81 is arranged at the rear end of the extraction handle 12, the first lead wire 81 is connected with the ablation needle 31, the sleeve tip 22 is connected with the extraction handle 12, at this time, the extraction needle 11 is inserted into the outer sleeve 21, and is used for sampling biopsy of human tissue; after sampling is completed, the outer sleeve 21 is left in the human tissue, the extraction needle 11 and the extraction handle 12 are taken out, and then the ablation handle 321 is connected with the ablation tip 322 of the ablation needle 31, so that the power supply of the ablation needle 31 is turned on, the ablation needle 31 is inserted into the outer sleeve 21, when the sleeve tip 22 at the rear end of the outer sleeve 21 is matched with the ablation tip 322 at the rear end of the ablation needle 31, the outer sleeve 21 is sleeved outside the ablation needle 31, and the ablation needle 31 can be used for ablation operation on human tissue (such as tumor); the ablation device has more functions, and can adapt to actual needs of the clinic. The specific human tissue extraction process is described below.

[0068] The extraction handle 12 includes an outer shell 51, a seat body 52, a sliding piece 56, an elastic piece 53 and an upper chamber piece 54, the outer shell 51 includes an upper shell 511 and the seat body 52, the sliding piece 56 is installed on the seat body 52 and can be slidably matched with the seat body 52, the extraction needle 11 is fixedly connected with the sliding piece 56 and the upper chamber piece 54, the elastic piece 53 is arranged between the sliding piece 56 and the outer shell 51, a locking part 55 is arranged in the longitudinal sliding direction of the sliding piece 56 and the seat body 52, and an unlocking part 541 is arranged on the upper chamber piece 54 and corresponds to the locking part 55. A front end head of the extraction needle 11 has an extraction sharp part 13, the extraction needle 11 is provided with an extraction recess 14 located at the rear side of the front end head, and the outer sleeve 21 is slidably matched with the extraction needle 11, and the outer sleeve 21 closes or opens the extraction recess 14.

[0069] An elastic lock 831 is arranged on the seat body 52, and the elastic lock 831 is provided with a locking platform 8311, an unlocking slope 8312 and a guide slope 8313. The sliding member 223 is provided with a locking portion 25, a sliding sheet 852 and a needle connecting portion 853. The locking portion 25 corresponds to the unlocking slope 8312 and the locking platform 8311. When the locking portion 25 cooperates with the locking platform 8311, the sliding member 2117 is locked. When the unlocking portion 25 cooperates with the unlocking slope 8312, the sliding member 223 is unlocked.

[0070] When the biopsy operation is performed, the operator holds the annular ear portion 501 with one hand, and pulls the pull handle 542 of the charging member 54 with the other hand. The charging member 54 pulls the sliding member 56 and the extraction needle 11 connected with the sliding member 56, and moves backward against the elastic force of the elastic member 53. When the sliding member 56 moves to the set position, the locking portion 55 locks the positions of the sliding member 56 and the extraction needle 11. At this time, the extraction recess 14 of the extraction needle 11 is closed by the outer sleeve 21. The front end of the biopsy ablation device is inserted into the human tissue, the charging member 54 is pushed forward, the extraction needle 11 reaches the extraction position, and the extraction recess 14 is exposed. When the charging member 54 is pushed to a certain position, the unlocking portion 541 at the front end of the charging member 54 unlocks the locking portion 55. The sliding member 56 moves backward quickly under the action of the elastic member 53, and drives the extraction needle 11 to move backward quickly. The human tissue in the extraction recess 14 is cut by the outer sleeve 21 and remains in the outer sleeve 21. When the biopsy ablation device is pulled out, the extracted human tissue can be detected by pathology.

[0071] The positioning head 61 is arranged at the rear end of the ablation end head 322, the buckle protrusion 411 is arranged at the front end of the positioning head 61, the insertion port 62 is arranged at the front end of the ablation handle portion 321, the positioning head 61 corresponds to the insertion port 62, and the buckle gap 412 is arranged outside the insertion port 62. The insertion port 62 is arranged at the front end of the extraction handle portion 12, the positioning head 61 corresponds to the insertion port 62, and the buckle gap 412 is arranged outside the insertion port 62. The positioning head 61 can ensure that the ablation end head 322 is accurately buckled in place.

[0072] The front cover body 502 is arranged at the front end of the extraction handle portion 12, and is movably connected to the front end of the extraction handle portion 12 through the hinge shaft 503. When the ablation end head 322 is connected to the extraction handle portion 12, the front cover body 502 is used to cover the ablation end head 322.

[0073] As shown in Figures 4 to 6 A plurality of buckle gaps 73 are arranged on the outer wall of the ablation end head 322 in the longitudinal direction, and a clamping protrusion 74 is arranged on the inner wall of the extraction handle portion 12, and the clamping protrusion 74 cooperates with the buckle gaps 73. Alternatively,Figures 7 to 8 As shown, a first adjusting thread 71 is provided on the outer wall of the ablation end 322, and the extraction handle 12 includes a cannula end 22. A second adjusting thread 72 is provided on the inner wall of the cannula end 22, and the first adjusting thread 71 and the second adjusting thread 72 cooperate. This is used to adjust the outer cannula 21, thereby adjusting the length of the ablation needle 31 protruding from the outer cannula 21. The longitudinal position of the outer cannula 21 relative to the ablation needle 31 can be adjusted by adjusting the threads, or by having the locking protrusion 74 engage with the locking notch 73 at different positions, thereby adjusting the different lengths of the ablation needle 31 protruding from the outer cannula 21.

[0074] As needed, the needle body of the ablation needle 31 may be made of conductive material and a conductive layer may be formed on the outer surface of the needle body. The handle may be made of insulating material and an insulating film layer 325 may be provided on the outer surface of the needle body. The insulating film layer 325 divides the conductive layer into at least two conductive segments 326.

[0075] Example 2

[0076] like Figures 18 to 19 As shown, in this embodiment, the ablation needle 31 has a hollow interior forming a channel 15. The front end of the channel 15 is closed, and the channel 15 is located at the rear end of the tip of the ablation needle 31. A heating element 153 is provided in the channel 15. Correspondingly, a second conductive wire 82 is provided in the ablation handle 321, through which power can be supplied to the heating element 153 in the ablation needle 31.

[0077] Example 3

[0078] like Figures 20 to 21 As shown, in this embodiment, the ablation needle 31 has a hollow interior forming a channel 15. The front end of the channel 15 is closed, and the channel 15 is located near the rear end of the tip of the ablation needle 31. A through-tube 155 is provided inside the channel 15, forming a first fluid passage 151 within the through-tube 155. A second fluid passage 152 is formed between the through-tube 155 and the ablation needle 31, and the first fluid passage 151 and the second fluid passage 152 communicate through the front end of the through-tube. Correspondingly, a gas guide tube 84 is provided inside the ablation handle 321, through which the cooling medium required for cooling and ablation can be provided to the channel 15 inside the ablation needle 31.

[0079] Example 4

[0080] like Figure 22As shown in the figure, in the embodiment, the ablation needle 31 is hollow inside to form a channel 15, the front end of the channel 15 is closed, the channel 15 is located at the rear end of the tip of the ablation needle 31, and a temperature measuring element 156 is arranged in the channel 15; correspondingly, a second lead wire 82 is arranged in the ablation handle 321, and the temperature signal of the temperature measuring element 156 can be extracted through the second lead wire 82.

[0081] The embodiment can refer to Embodiment Two, and the temperature measuring function can be realized by replacing the heating element 153 in Embodiment Two with the temperature measuring element 156.

[0082] Embodiment Five

[0083] As shown in the figure, Figure 23 , Figure 24 As shown in the figure, in the embodiment, the ablation needle 31 is hollow inside to form a channel 15, the front end of the channel 15 is closed, the channel 15 is located at the rear end of the tip of the ablation needle 31, and a temperature measuring element 156 is arranged in the channel 15; correspondingly, a second lead wire 82 is arranged in the ablation handle 321, and the temperature signal of the temperature measuring element 156 can be extracted through the second lead wire 82.

[0084] Embodiment Six

[0085] As shown in the figure, Figure 25 As shown in the figure, in the embodiment, the ablation needle 31 is hollow inside to form a channel 15, the front end of the channel 15 is closed, the channel 15 is located at the rear end of the tip of the ablation needle 31, and a temperature measuring element, a heating element and a through pipe 155 are arranged in the channel 15; the through pipe 155 forms an air cooling channel, the temperature measuring element and the heating element can be coupled as an electrically coupled resistance combined wire 157, and the electrically coupled resistance combined wire 157 can realize the functions of heating and temperature measuring.

[0086] The above embodiments are exemplary representations and deductions of the technical solutions of the present application, and are used to completely describe the technical solutions, objects and effects of the present application, and the purpose is to make the public more thoroughly and comprehensively understand the disclosure of the present application, and does not limit the protection scope of the present application.

[0087] The above embodiments are not exhaustive enumeration based on the present application, and there can be many other unlisted embodiments. Any replacement and improvement made without violating the concept of the present application is within the protection scope of the present application.

Claims

1. A biopsy ablation device, characterized by, The biopsy and ablation device comprises an extraction needle and an ablation device, the ablation device comprises an outer sleeve, an ablation needle, an ablation handle, the rear end of the ablation needle is provided with an ablation tip, the rear end of the outer sleeve is provided with a sleeve tip, the ablation tip is provided with a first connecting part, the sleeve tip is provided with a second connecting part, when the first connecting part cooperates with the second connecting part, the ablation needle is located in the outer sleeve and is in sliding cooperation with the outer sleeve; A first lead wire is arranged in the ablation handle, a third connecting part is arranged on the ablation handle, the first connecting part cooperates with the second connecting part; when the first connecting part is connected with the third connecting part, the first lead wire is in lead connection with the ablation needle; The rear end of the extraction needle is provided with an extraction handle, a fourth connecting part is arranged on the extraction handle, the first connecting part can be detachably connected with the fourth connecting part; The extraction handle comprises an outer shell, a sliding part, an elastic part and an upper chamber part, the sliding part is installed in the outer shell and can slide relative to the outer shell, the elastic part is arranged between the sliding part and the outer shell, a locking part is arranged in the longitudinal sliding direction of the sliding part and the outer shell, an unlocking part is arranged on the upper chamber part, the unlocking part corresponds to the locking part, the extraction needle is fixedly connected with the upper chamber part, and the extraction needle is in sliding connection with the sliding part; The outer shell comprises an upper shell and a seat, the upper shell is fixedly connected with the seat, an elastic locking part is arranged on the seat, the elastic locking part has a locking table, an unlocking slope and a guide slope, the sliding part is provided with a locking part, a sliding sheet and a needle body connecting part; the locking part corresponds to the unlocking slope and the locking table, when the locking part cooperates with the locking table, the sliding part is locked, and when the unlocking part cooperates with the unlocking slope, the sliding part is unlocked; A first adjusting screw thread is arranged on the outer wall of the ablation tip, the extraction handle comprises a sleeve tip, and a second adjusting screw thread is arranged on the inner wall of the sleeve tip, the first adjusting screw thread cooperates with the second adjusting screw thread. Or, A plurality of buckle notches are longitudinally arranged on the outer wall of the ablation tip, and a buckle convex is arranged on the inner wall of the extraction handle, the buckle convex cooperates with the buckle notches.

2. The biopsy and ablation device according to claim 1, wherein At least two buckle protrusions are arranged on the ablation tip, and the first connecting part is the buckle protrusion; at least two buckle notches are arranged on the ablation handle, and the third connecting part is the buckle notch, the buckle protrusion cooperates with the buckle notch.

3. The biopsy ablation device of claim 2, wherein the biopsy ablation device is configured to be inserted into the patient's body through a cannula. A positioning head is arranged at the rear end of the ablation tip, the buckle protrusion is arranged at the front end of the positioning head, an insertion opening is arranged at the front end of the ablation handle, the positioning head corresponds to the insertion opening, and the buckle notch is arranged outside the insertion opening.

4. The biopsy and ablation device according to claim 1, wherein An extraction recess is arranged on the extraction needle; The extraction needle is internally hollow to form a channel, the front end of the channel is closed, the channel is located at the rear end position of the extraction recess, and a heating element is arranged in the channel. Alternatively, the extraction needle is internally hollowed to form a channel, the front end of the channel is closed, the channel is located at the rear end of the extraction recess, a first fluid passage is formed in the channel, a second fluid passage is formed between the channel and the ablation needle, the first fluid passage and the second fluid passage are communicated through the front end of the channel.

5. The biopsy-ablation device of claim 4, wherein: the front end of the extraction needle has an extraction tip, the extraction recess is located at the rear side of the front end, the outer sleeve closes or opens the extraction recess when the extraction needle is in sliding engagement with the outer sleeve.

6. The biopsy ablation device of any one of claims 1 to 5, wherein, a front cover is provided at the front end of the extraction handle, the front cover is movably connected to the front end of the extraction handle through a hinge shaft, and the front cover is used to cover the ablation tip when the ablation tip is connected to the extraction handle.

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