CN217488823U

CN217488823U - Radio frequency ablation needle

Info

Publication number: CN217488823U
Application number: CN202123192646.9U
Authority: CN
Inventors: 徐宏
Original assignee: Hangzhou Kunbo Biotechnology Co Ltd
Current assignee: Hangzhou Kunbo Biotechnology Co Ltd
Priority date: 2021-12-19
Filing date: 2021-12-19
Publication date: 2022-09-27
Anticipated expiration: 2031-12-19

Abstract

The embodiment of the utility model discloses radio frequency ablation needle, include: handle portion, syringe portion and shield cover. The booster on the handle portion is arranged in the sleeve on the handle portion in a sliding mode, and the metal joint on the booster is used for being externally connected with the radio frequency ablation instrument. The puncture tube on the needle tube part is fixed on the sleeve, and the electrode tube of the needle tube part is connected with the metal joint and is arranged in the puncture tube in a sliding manner. The electrode tube is provided with a plurality of claw-shaped sub-needles which are used for transmitting the current transmitted by the radio frequency ablation instrument to human tissues. Be equipped with the shield cover on the booster, the shield cover includes: the first separation blade is arranged in the first sliding groove in a sliding mode through the fixing of the first spring, and the second separation blade is arranged in the second sliding groove in a sliding mode through the second spring. The first blocking piece and the second blocking piece are abutted to seal the opening on the cover body. The shield cover is arranged on the booster to prevent dust from entering the metal joint and influencing the conductive capacity of the metal joint.

Description

Radio frequency ablation needle

Technical Field

The embodiment of the utility model provides a relate to the medical instrument field, especially relate to a radio frequency melts needle.

Background

The radio frequency thermal ablation equipment consists of a generator, a measurement and control unit, an electrode needle, a skin electrode and a computer. The system forms a closed loop connecting the electrode needle to the patient's skin. The measurement and control unit automatically adjusts the output power of the radio frequency ablation by monitoring the parameter changes of the impedance, the temperature and the like of the tumor tissue, so that the tumor tissue can rapidly generate large-scale coagulative necrosis. The ablation electrode is a core component of the radiofrequency ablation instrument, as it directly affects the size and shape of coagulation necrosis. The ideal shape of the coagulated region should be spherical or oblate spherical. Under the guidance of B-ultrasonic or CT, the multiple needle electrodes are directly pricked into a lesion tissue tumor mass, the temperature in the tissue can exceed 60 ℃ by the radio-frequency electrode needle, cells die, and a necrotic region is generated; if the local tissue temperature exceeds 100 ℃, the tumor tissue and the parenchyma surrounding the organ are subjected to coagulation necrosis, a large spherical coagulation necrosis area can be generated during treatment, and a heat treatment area of 43-60 ℃ is arranged outside the coagulation necrosis area, so that cancer cells can be killed in the area, and normal cells can be recovered.

For the existing radio frequency ablation needle, the metal electrode at the position connected with the radio frequency ablation instrument is exposed in the air and easily enters dust to influence the conductivity of the radio frequency ablation needle, so that the problem to be solved urgently is to prolong the service life of the metal electrode on the radio frequency ablation needle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radio frequency ablation needle, external on the radio frequency ablation appearance, set up the shield cover at the position of being connected with the radio frequency ablation appearance and can prevent that the dust from getting into, prolong its life.

The embodiment of the utility model provides a radio frequency ablation needle is applied to on the radio frequency ablation appearance, a serial communication port, include: a handle portion, a needle tube portion and a shield cover;

the handle portion includes: the booster comprises a barrel sleeve and a booster, wherein the booster is arranged at one end of the barrel sleeve in a sliding manner, and a metal joint is arranged in the booster;

the needle tube unit includes: a puncture tube and a plurality of electrode tubes;

the puncture tube is fixed at the other end of the barrel sleeve, the electrode tube is arranged in the puncture tube in a sliding manner, one end of the electrode tube extends into the barrel sleeve and is connected with the metal joint, the metal joint is used for being externally connected with a radio frequency ablation instrument, and the other end of the electrode tube is provided with a plurality of claw-shaped sub-needles which are used for transmitting current into a human body;

the shield cover is the hemisphere, the shield cover includes: the mask body, the first blocking piece, the second blocking piece, the first spring and the second spring;

one side of the cover body is fixed on the booster, and the other side of the cover body is provided with an opening;

a first sliding groove and a second sliding groove are formed in the inner side wall of the cover body, and are symmetrically arranged around the central axis of the booster;

the first blocking piece is slidably arranged on the first sliding groove, the first spring is arranged in the first sliding groove, one end of the first spring is connected with the first blocking piece, and the other end of the first spring is connected with the cover body;

the second baffle plate is slidably arranged on the second sliding groove, the second spring is arranged in the second sliding groove, one end of the second spring is connected with the second baffle plate, and the other end of the second spring is connected with the cover body;

the first blocking piece, the second blocking piece, the first spring and the second spring are respectively and symmetrically arranged around the central axis of the booster;

the first spring and the second spring are used for abutting against the first blocking piece and the second blocking piece, and the opening is closed when the first blocking piece and the second blocking piece abut against each other.

In a feasible scheme, a first notch is arranged on the first blocking piece of the radio frequency ablation needle, and a second notch is arranged on the second blocking piece;

the first notch corresponds to the second notch, and the first notch and the second notch are used for pushing the first blocking piece and the second blocking piece away.

In a feasible scheme, a first fixing ring is arranged on the first blocking piece of the radio frequency ablation needle, and a second fixing ring is arranged on the second blocking piece;

the first fixing ring is used for being connected with the first spring in a hanging mode, and the second fixing ring is used for being connected with the second spring in a hanging mode.

In a feasible scheme, a fixing device is arranged on the barrel sleeve of the radio frequency ablation needle;

the fixing device comprises a first ring, a second ring, a first buckle and a second buckle; the first ring and the second ring are fixed on the sleeve, the first buckle penetrates through the first ring, and the second buckle penetrates through the second ring;

a limiting plate is arranged on the booster; the first buckle and the second buckle are used for buckling the limiting plate.

In a feasible scheme, the booster of the radiofrequency ablation needle is provided with external threads, and the cover body is provided with internal threads, so that the cover body is in threaded connection with the booster.

In one possible approach, the radiofrequency ablation needle comprises: fixing a sleeve;

the fixed sleeve is sleeved on the sleeve, and the fixed sleeve is used for fixing the puncture tube.

In one possible approach, the radiofrequency ablation needle comprises: an outer joint;

the outer joint is positioned on the outer wall of the barrel sleeve and used for inserting the external electrode tube into the puncture tube.

In a possible scheme, the shielding cover of the radio frequency ablation needle is plated with a metal layer, and the metal layer is used for shielding signals.

Based on the above technical scheme can know, the utility model discloses a radio frequency ablation needle includes: handle portion, syringe portion and shield cover. The booster on the handle part is arranged in the sleeve on the handle part in a sliding way, and a metal joint externally connected with a radio frequency ablation instrument is arranged in the booster. The puncture tube of the needle tube part is fixed at the other end of the barrel sleeve, the electrode tube of the needle tube part is connected with the metal joint on the booster and is arranged in the puncture tube in a sliding manner, and the electrode tube is also provided with a plurality of claw-shaped sub-needles which can be used for conducting current into human tissues. And a shielding cover is arranged on one side of the booster and is hemispherical. The first blocking piece, the second blocking piece, the first spring and the second spring are arranged in the cover body, the first blocking piece is fixed in a first sliding groove in the cover body through the first spring, the second blocking piece is fixed in a second sliding groove in the cover body through the second spring, the first blocking piece and the second blocking piece are abutted and held, and an opening in the cover body can be closed when the first blocking piece and the second blocking piece are abutted and held. The utility model discloses a radiofrequency ablation instrument is through setting up the shield cover on the boost motor, and the metal joint is enclosded in the inside of the cover body, has an opening directly over the metal joint for external radiofrequency ablation instrument. When first baffle can the second baffle contact, first spring and second spring are in natural state, and first baffle and the closed area of second baffle will be greater than open-ended area, so can be very easy seal the opening through first baffle and second baffle, prevent effectively that the dust from getting into the inside electric conductivity that influences metal joint of the cover body, improved metal joint's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic view of an overall structure of a radio frequency ablation needle according to a first embodiment of the present invention;

fig. 2 is a schematic view illustrating a working state of the rf ablation needle according to the first embodiment of the present invention;

fig. 3 is a cross-sectional view of a shield according to a first embodiment of the present invention.

The reference numbers in the figures:

1. a handle portion; 11. a barrel sleeve; 111. a fixing device; 1111. a first ring; 1112. a second ring; 1113. a first buckle; 1114. a second buckle; 112. a port; 12. a booster; 121. a limiting plate; 122. an external thread; 123. a metal joint; 2. a needle tube portion; 21. a puncture tube; 22. an electrode tube; 221. a plurality of claw-shaped sub-needles; 3. a shield case; 31. a cover body; 311. a first chute; 312. a second chute; 313. an opening; 314. an internal thread; 32. a first baffle plate; 321. a first notch; 322. a first retaining ring; 33. a second baffle plate; 331. a second notch; 332. a second retaining ring; 34. a first spring; 35. a second spring; 4. fixing a sleeve; 5. an outer joint; 51. a cap; 6. a metal layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a schematic view of an overall structure of a radio frequency ablation needle according to a first embodiment of the present invention; fig. 2 is a schematic view illustrating an operating state of the rf ablation needle according to the first embodiment of the present invention; fig. 3 is a cross-sectional view of a shield according to a first embodiment of the present invention.

The radiofrequency ablation needle in the embodiment is applied to a radiofrequency ablation instrument. The radio frequency ablation needle includes: handle portion 1, needle tube portion 2 and shield 3. The handle portion 1 includes: a cartridge 11 and a booster 12. The booster 12 is positioned in the barrel sleeve 11, the barrel sleeve 11 is sleeved at one end of the booster 12, the booster 12 is arranged in the barrel sleeve 11 in a sliding mode, and the booster 12 can be freely pushed in the barrel sleeve 11. The other end of the booster 12 is provided with a metal joint 123, the metal joint 123 is used for being externally connected with a lead on a radio frequency ablation instrument, and four electrode holes are formed in the metal joint 123 and correspond to jacks on the lead of the ablation instrument. The needle tube portion 2 includes: a puncture tube 21 and an electrode tube 22. The electrode tube 22 is movably arranged in the puncture tube 21. A port 112 is arranged below the sleeve 11, the puncture tube 21 is fixed on the port 112, and one end of the electrode tube 22 passes through the port 112 and extends into the sleeve 11 and is fixed on the metal joint 123. At the end of the electrode tube 22, a plurality of claw-like sub-needles 221 are provided, and the plurality of claw-like sub-needles 221 are initially received in the puncture tube 21. The electrode tube 22 is fixed to the metal joint 123, and the metal joint 123 is mounted on the booster 12, so that the electrode tube 22 is also fixed to the booster 12. When the driver 12 is pushed forward in the sleeve 11, the electrode tube 22 is also moved forward by the driver 12, and the electrode tube 22, which is originally contained in the puncture tube 21, is pushed out of the puncture tube 21, and the plurality of claw-shaped sub-needles 221 protrude like an umbrella. The metal connector 123 is externally connected with a radio frequency ablation instrument, the current finally reaches the plurality of claw-shaped sub-needles 221 through the metal connector 123 and the electrode tube 22, and the plurality of claw-shaped sub-needles 221 transmit the current into human tissues.

A shield 3 is provided on the top of the booster 12, the shield 3 is hollow, and the shield 3 surrounds the metal terminal 123. The shield 3 is hemispherical and comprises: cover 31, first flap 32, second flap 33, first spring 34 and second spring 35. One end of the cover 31 is fixed to the booster 12, and the other end of the cover 31 opposite to the booster 12 has an opening 313, and the opening 313 is oriented to be exactly aligned with the metal joint 123. A first sliding groove 311 and a second sliding groove 312 are arranged in the cover body 31, the first sliding groove 311 and the second sliding groove 312 are arc-shaped, the first sliding groove 311 and the second sliding groove 312 are tightly attached to the inner wall of the cover body 31, and the first sliding groove 311 and the second sliding groove 312 are symmetrically arranged relative to the central axis of the booster 12. The first sliding chute 311 is provided with a first blocking piece 32, the first blocking piece 32 can slide on the first sliding chute 311, the first blocking piece 32 clings to the inner wall of the cover 31 to slide along the circular arc track of the first sliding chute 311, and the outer surface of the first blocking piece 32 is tangent to the inner wall of the cover 31 when the first blocking piece 32 slides in the first sliding chute 311. A first spring 34 is arranged between the end of the first sliding slot 311 and the first blocking piece 32, the first spring 34 is fixed in the first sliding slot 311 in a bending manner, one end of the first spring 34 is fixed on the first blocking piece 32, and the other end of the first spring is fixed at the bottom of the cover body 31. The first flap 32 is stretched and compressed by the first spring 34 and moved. The second sliding chute 312 is provided with a second blocking piece 33, the second spring 35 is fixed in the second sliding chute 312 in a bending manner, the second blocking piece 33 can slide on the second sliding chute 312, the second blocking piece 33 slides along the circular arc track of the second sliding chute 312 closely attached to the inner wall of the cover 31, and the outer surface of the second blocking piece 33 is tangent to the inner wall of the cover 31 when the second blocking piece 33 slides in the second sliding chute 312. A second spring 35 is arranged between the end of the second sliding slot 312 and the second stopper 33, the second spring 35 is fixed in the second sliding slot 312 in a bending manner, one end of the second spring 35 is fixed on the second stopper 33, and the other end of the second spring 35 is fixed at the bottom of the cover body 31. since the second sliding slot 312 is arc-shaped and the second spring 35 is fixed in the second sliding slot 312, the movement track of the second spring 35 is also arc-shaped when the second stopper 33 is stretched and compressed by the second spring 35. The second shutter 33 is moved by the tension and compression of the second spring 35. The first and

second stoppers

32 and 33 are symmetrically disposed with respect to the central axis of the booster 12, and the first and

second springs

34 and 35 are symmetrically disposed with respect to the central axis of the booster 12. When the first spring 34 and the second spring 35 are in a natural state, the first blocking piece 32 and the second blocking piece 33 are contacted, and after the first blocking piece 32 and the second blocking piece 33 are contacted, the opening 313 in the cover 31 is closed. If an external radio frequency ablation instrument is required to be connected, the first blocking piece 32 and the second blocking piece 33 are pushed, a catheter of the radio frequency ablation instrument is connected to the metal connector 123, at this time, the first spring 34 and the second spring 35 are in a compressed state, and the first blocking piece 32 and the second blocking piece 33 respectively extrude the first spring 34 and the second spring 35, so that the first spring 34 and the second spring 35 simultaneously give rebounding acting force to the first blocking piece 32 and the second blocking piece 33, the first blocking piece 32 and the second blocking piece 33 can block the catheter of the radio frequency ablation instrument, and meanwhile, the function of fixing the catheter of the radio frequency ablation instrument is achieved.

Through the above-mentioned content difficult discovery, the utility model discloses a radio frequency ablation needle includes: handle portion 1, needle tube portion 2 and shield 3. The booster 12 on the handle part 1 is arranged in the barrel sleeve 11 on the handle part 1 in a sliding way, and a metal joint 123 externally connected with the radio frequency ablation instrument is arranged in the booster 12. The puncture tube 21 of the needle tube part 2 is fixed at the other end of the sleeve 11, the electrode tube 22 of the needle tube part 2 is connected with the metal joint 123 on the booster 12 and is arranged in the puncture tube 21 in a sliding way, a plurality of claw-shaped sub-needles 221 are arranged on the electrode tube 22, and the plurality of claw-shaped sub-needles 221 can be used for conducting current into human tissues. A shielding cover 3 is arranged on one side of the booster 12, and the shielding cover 3 is hemispherical. The first blocking piece 32, the second blocking piece 33, the first spring 34 and the second spring 35 are arranged in the cover body 31, the first blocking piece 32 is fixed in a first sliding groove 311 in the cover body 31 through the first spring 34, the second blocking piece 33 is fixed in a second sliding groove 312 in the cover body 31 through the second spring 35, and the first blocking piece 32 and the second blocking piece 33 are abutted and can close an opening 313 in the cover body 31 when abutted. The utility model discloses a radio frequency ablation appearance is through setting up shield cover 3 on boost motor 12, and metal joint 123 is enclosed in the inside of the cover body 31, has an opening 313 directly over metal joint 123 for external radio frequency ablation appearance. When the first blocking piece 32 can be contacted with the second blocking piece 33, the first spring 34 and the second spring 35 are in a natural state, and the closed area of the first blocking piece 32 and the second blocking piece 33 is larger than that of the opening 313, so that the opening 313 can be easily closed through the first blocking piece 32 and the second blocking piece 33, dust is effectively prevented from entering the interior of the cover body 31 to influence the conductivity of the metal connector 123, and the service life of the metal connector 123 is prolonged.

Optionally, in this embodiment, the first blocking portion 32 has a first notch 321, and the second blocking portion 33 has a second notch 331. The first notch 321 and the second notch 331 are symmetrically disposed with respect to the central axis of the booster 12. The first notch 321 corresponds to the second notch 331, and when the first flap 32 contacts the second flap 33, the first notch 321 and the second notch 331 are connected to form a larger notch. When the radio frequency ablation instrument catheter is connected to the metal connector 123, the first blocking piece 32 and the second blocking piece 33 need to be pushed open, and if the first blocking piece 32 and the second blocking piece 33 are pushed directly, the first blocking piece 32 and the second blocking piece 33 can be pushed open from the first notch 321 and the second notch 331, so that the radio frequency ablation instrument catheter can be accessed more conveniently and labor-saving.

Optionally, in this embodiment, a first fixing ring 322 is fixed on the first flap 32, and a second fixing ring 332 is fixed on the second flap 33. The first fixing ring 322 is fixed at the other end of the first blocking piece 32 opposite to the first notch 321, one end of the first spring 34 is hung on the first fixing ring 322, and when the first spring 34 needs to pull the first blocking piece 32, the first blocking piece 32 can be pulled by pulling the first fixing ring 322. The second fixing ring 332 is hung at the other end of the second blocking piece 33 opposite to the second notch 331, one end of the second spring 35 is fixed on the second fixing ring 332, and when the second spring 35 needs to pull the second blocking piece 33, the second blocking piece 33 can be pulled by pulling the second fixing ring 332.

Alternatively, in the present embodiment, the fixing device 111 is mounted on the barrel 11, the stopper plate 121 is disposed on the booster 12, and the stopper plate 121 is disposed on the booster 12 in an elliptical shape. The fixing device 111 includes: a first ring 1111, a second ring 1112, a first catch 1113, and a second catch 1114. The first ring 1111 and the second ring 1112 are installed on the outer wall of the cartridge 11, and the first ring 1111 and the second ring 1112 are respectively located below the protruding end of the restriction plate 121. On first ring 1111 and second ring 1112, wear to establish first buckle 1113 and second buckle 1114 respectively, first buckle 1113 can make circular motion around first ring 1111, and second buckle 1114 can make circular motion around second ring 1112. When the booster 12 is pushed toward the sleeve 11 and reaches the maximum position that can be advanced in the sleeve 11, the first buckle 1113 and the second buckle 1114 can be buckled on the position limiting plate 121, so that the position limiting plate 121 is fixed, and the booster 12 is prevented from moving in the sleeve 11.

Alternatively, in this embodiment, the booster 12 has an external thread 122, and the cover 31 has an internal thread 314, so that when the cover 31 needs to be sleeved on the booster 12, the shield 3 can be screwed on the booster 12 by screwing, thereby fixing the shield 3.

Optionally, in this embodiment, the rf ablation needle further includes: a fixing sleeve 4. The puncture tube 21 is fixed to the port 112 of the cartridge 11, and in order to prevent the puncture tube 21 from loosening, one end of the fixing sleeve 4 is fitted over the port 112, and then the puncture tube 21 is passed out of the fixing sleeve 4, thereby fixing the positions of the port 112 and the puncture needle.

Optionally, in this embodiment, the rf ablation needle further includes: an outer joint 5. The outer wall of the lower end of the sleeve 11 is provided with an outer joint 5, a conduit inside the outer joint 5 can be directly connected to the puncture tube 21, and when other electrode tubes 22 are needed in the operation process, the electrode tubes 22 can be directly inserted into the puncture tube 21 through the outer joint 5.

Optionally, in this embodiment, a cap 51 is further disposed on the outer joint 5. The outer joint 5 and the cap 51 are both provided with threads, and the outer joint 5 and the cap 51 are in threaded connection. When the external joint 5 does not need to be connected to another electrode tube 22, the cap 51 can be screwed on the external joint 5 to prevent dust from entering the interior of the sleeve 11 through the external joint 5.

Optionally, in this embodiment, the shielding case 3 is coated with the metal layer 6, and since the rf ablation instrument and the metal joint 123 generate a magnetic field when they are connected, the metal layer 6 on the shielding case 3 can effectively prevent the magnetic field interference.

In the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media.

Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

1. A radio frequency ablation needle is applied to a radio frequency ablation instrument and is characterized by comprising: a handle portion, a needle tube portion and a shield cover;

the needle tube section includes: a puncture tube and an electrode tube;

the puncture tube is fixed at the other end of the barrel sleeve, the electrode tube is arranged in the puncture tube in a sliding manner, one end of the electrode tube extends into the barrel sleeve and is connected with the metal joint, the metal joint is used for being externally connected with a radio frequency ablation instrument, the other end of the electrode tube is provided with a plurality of claw-shaped sub-needles, and the claw-shaped sub-needles are used for transmitting current into a human body;

the second blocking piece is slidably arranged on the second sliding groove, the second spring is arranged in the second sliding groove, one end of the second spring is connected with the second blocking piece, and the other end of the second spring is connected with the cover body;

2. The radiofrequency ablation needle of claim 1, wherein the first baffle has a first notch and the second baffle has a second notch;

3. The rf ablation needle of claim 1, wherein the first baffle has a first retaining ring disposed thereon, and the second baffle has a second retaining ring disposed thereon;

4. The rf ablation needle of claim 1, wherein the sleeve includes a securing mechanism;

5. The radiofrequency ablation needle of claim 1, wherein the booster has external threads and the cover has internal threads, such that the cover is threadably coupled to the booster.

6. The rf ablation needle of claim 1, comprising: fixing a sleeve;

the fixed sleeve is sleeved on the sleeve and is used for fixing the puncture tube.

7. The rf ablation needle of claim 1, comprising: an outer joint;

8. The radio frequency ablation needle according to claim 7, wherein a cap is provided on the outer joint, and the cap is in threaded connection with the outer joint.

9. The rf ablation needle of claim 1, wherein the shield is plated with a metal layer, the metal layer shielding the signal.