CN114129256A

CN114129256A - Ablation method of radio frequency ablation electrode needle

Info

Publication number: CN114129256A
Application number: CN202111325594.XA
Authority: CN
Inventors: 刘丽文; 黄俊哲; 胡芮; 李静; 韩宇鹏
Original assignee: Air Force Medical University of PLA
Current assignee: Air Force Medical University of PLA
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-04
Anticipated expiration: 2041-11-10
Also published as: CN114129256B

Abstract

The invention discloses an ablation method of a radio frequency ablation electrode needle, which comprises the steps of carrying out ablation by using a radio frequency ablation electrode needle system, wherein the radio frequency ablation electrode needle system comprises an electrode needle unit, the electrode needle unit comprises an electrode needle, a handle and a sheath, the handle and the sheath are sleeved outside the electrode needle, the handle and the sheath are coaxially and sequentially connected, and the electrode needle sequentially penetrates through the handle and the sheath and then extends out; the electrode needle adjusting device also comprises a length adjusting unit and an angle adjusting unit which are connected with the electrode needle unit, wherein the length adjusting unit adjusts the extending length of the electrode needle during working; the angle adjusting unit comprises a steering ball arranged at the end part of the sheath, a pore for the electrode needle to penetrate out is arranged in the steering ball, and the angle adjusting unit further comprises a first adjusting mechanism and a second adjusting mechanism which are used for adjusting the rotating angle of the steering ball so that the electrode needle extends out of the pore at different angles. The length and the angle of the working end can be adjusted, and the damage to myocardial tissues and conduction bundles caused by multiple times of puncture can be reduced.

Description

Ablation method of radio frequency ablation electrode needle

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to an ablation method of a radio frequency ablation electrode needle.

Background

Hypertrophic Cardiomyopathy (HCM) is a common hereditary cardiovascular disease, is the leading cause of sudden cardiac death of teenagers and athletes, and seriously affects the life quality and life health of patients.

In recent years, Liwen's type of surgery as a significant technological innovation for a new approach to cardiac disease intervention has provided new strategies for HCM treatment. The principle is that under the real-time guidance of ultrasound, a radio frequency needle is punctured percutaneously and accurately through myocardium to reach an interventricular myocardial hypertrophy part (the thickness is more than or equal to 15mm), high-frequency alternating current emitted by a working end of a radio frequency electrode needle is utilized to enable ions in hypertrophic myocardial tissue cells to rub with each other to generate heat, the local temperature can reach more than 80 ℃, the hypertrophic myocardial cells around the electrode needle are dehydrated, irreversible coagulative necrosis of the tissue cells is caused, the interventricular thickness is thinned, the inner diameter of a left ventricular outflow tract is widened, the obstruction of the left ventricular outflow tract is relieved, and the clinical symptoms of a patient are improved.

However, the current radio frequency ablation needles are mostly used for minimally invasive treatment of parenchymal organs such as liver, thyroid and the like and tumors, the minimally invasive treatment of myocardial tissues still belongs to the clinical trial exploration stage, and the radio frequency ablation needles clinically used for treating hypertrophic cardiomyopathy mainly have the following problems during ablation:

(1) the ablation needle in the market at present needs to change needle ways for multiple times to change the direction of the needle head when changing the ablation position because the needle head is fixed and can not rotate, so that the operation time is easily prolonged; meanwhile, the heart is different from other organs, the myocardial tissues are distributed with conduction bundles and coronary vessels, and multiple needle-rotating puncture is easy to cause damage to extra myocardium, conduction systems and coronary artery septal branches, so that the risks of serious complications such as conduction block, heart surface tearing injury, pericardial effusion and even pericardial tamponade are increased.

(2) Most common ablation needles on the market today are fixed in electrode working end size (e.g., 10mm/20mm/30 mm). The working ends of a few ablation needles are adjustable in length in a hand-pushing mode, but the length transformation size interval is large, the size adjustment precision is rough, the hand-pushing type length is difficult to adjust in place at one time, multiple times of fine adjustment are needed, the overall design is not fine enough, and the operation is inconvenient.

(3) The ablation needle has larger resistance in the process of puncturing the myocardial tissue by changing the needle channel in the operation. At present, the materials of an ablation needle and a puncture needle used in the medical market are mostly 304/316 stainless steel, the surface roughness is about Ra0.4, the friction coefficient is large, the friction force between the needle wall and myocardial tissues is large, and the tissue adhesion is easy to occur; in the ablation process, organic matters of human bodies such as tissues and proteins adhered to the needle wall are easily carbonized in the continuous heating process, and the carbonized tissues wrap the electrode needle, so that the conduction of alternating current to peripheral myocardial tissues is blocked, and the ablation range is too small; the carbonized tissue wrapped by the synchronous ablation needle easily causes the impedance of the myocardial tissue around the test needle of the host machine to be too high, so that the false dormancy condition of misjudgment of the ablation system occurs, the error of the ablation range is increased, and the ablation stability is reduced.

Disclosure of Invention

In order to overcome the defects or shortcomings in the prior art, the invention aims to provide an ablation method of a radio frequency ablation electrode needle.

In order to achieve the purpose, the invention adopts the following technical scheme:

a radio frequency ablation electrode needle system comprises a radio frequency ablation electrode needle system for ablation, wherein the radio frequency ablation electrode needle system comprises an electrode needle unit, the electrode needle unit comprises an electrode needle, a handle and an outer sheath, the handle and the outer sheath are sleeved outside the electrode needle, the handle and the outer sheath are coaxially and sequentially connected, and the electrode needle sequentially penetrates through the handle and the outer sheath and then extends out;

the electrode needle adjusting device is characterized by also comprising a length adjusting unit and an angle adjusting unit which are connected with the electrode needle unit, wherein the length adjusting unit adjusts the extending length of the electrode needle during working;

the angle adjusting unit comprises a steering ball arranged at the end part of the sheath, a pore for the electrode needle to penetrate out is arranged in the steering ball, the angle adjusting unit further comprises a first adjusting mechanism and a second adjusting mechanism, and the first adjusting mechanism and the second adjusting mechanism are used for adjusting the rotating angle of the steering ball so that the electrode needle extends out of the pore at different angles.

Furthermore, the first adjusting mechanism comprises a second knob, a first traction guide wire connected with the second knob, and a first lug connected with the first traction guide wire, the second knob is arranged on the handle in a penetrating manner, the first traction guide wire is arranged between the outer sheath and the electrode needle, and the second knob can rotate to pull the first traction guide wire to enable the first lug to rotate;

the second adjusting mechanism comprises a third knob, a second traction guide wire and a second bump which are sequentially connected, the third knob and the second knob are oppositely arranged on the handle in a penetrating mode, the arrangement mode of the second traction guide wire and the second bump is the same as that of the first traction guide wire and the first bump, and the third knob can be rotated to pull the second traction guide wire to enable the second bump to rotate;

the ablation method comprises the steps that the length adjusting unit is used for adjusting the extending length of the electrode needle during working, the angle adjusting unit is used for adjusting the extending angle of the electrode needle during working, the extending length of the needle point portion of the electrode needle is 0-40 mm, the axis of the electrode needle after extending out is coaxial with the axis of the sheath or forms an acute angle, and the acute angle is smaller than 60 degrees.

Furthermore, first pivot is worn to establish inside the first lug, rotary motion is around first pivot to first lug, second pivot is worn to establish inside the second lug, rotary motion is around the second pivot to the second lug, the axis of first pivot with the axis mutually perpendicular of second pivot.

Specifically, a plurality of first grooves matched with the first bumps and a plurality of second grooves matched with the second bumps are arranged on the surfaces of the steering balls;

the first lug can be sequentially embedded with one first groove every time the first lug rotates around the first rotating shaft, and the second lug can be sequentially embedded with one second groove every time the second lug rotates around the second rotating shaft.

Specifically, the first bump and the second bump are both provided with a reset piece.

Furthermore, the length adjustment unit is including the cover establish first knob and advancing and retreat mechanism on the electrode needle, first knob sets up in the handle outside, advance and retreat the mechanism setting inside the handle.

Specifically, the advancing and retreating mechanism is an external thread, an internal thread screwed with the external thread is arranged in the handle, and the first knob is rotated to enable the advancing and retreating mechanism and the handle to move along a screwing axis.

Furthermore, the radiofrequency ablation electrode needle system also comprises a connecting wire unit connected with the electrode needle unit, wherein the connecting wire unit comprises a first connecting pipe, a second connecting pipe and an anode connecting wire, the end part of the first connecting pipe is provided with a first connector, the end part of the second connecting pipe is provided with a second connector, and the end part of the anode connecting wire is provided with an anode connector;

the electrode needle structure further comprises a coolant inflow pipe, a coolant outflow pipe and a negative electrode connector, wherein the connector of the inflow pipe is connected with the second connector and used for sending the coolant into the needle cavity of the electrode needle, and the connector of the outflow pipe is connected with the first connector and used for discharging the coolant.

Specifically, the inflow pipe is provided with an inflow mark and a positioning clamp, the first knob is provided with scale marks, and the second knob are both provided with angle marks.

Compared with the prior art, the invention has the following beneficial effects:

the ablation method of the radio frequency ablation electrode needle has the function of adjusting the extending length of the electrode working end of the ablation needle and the function of accurately adjusting the angle of the needle head in the surgical ablation process. The puncture times caused by adjusting the direction of the needle head in the operation process can be reduced, and the damage to the myocardial tissue and the conduction bundle caused by multiple punctures is reduced; the length of the working end of the ablation needle can be adjusted gradually and continuously, and the operation risk caused by overlong operation time or overlarge ablation range due to improper selection of the length of the ablation needle is reduced. The radiofrequency ablation needle system can realize accurate regulation and control of the direction of the ablation needle and the length of the working end by regulating and controlling the external control system of the radiofrequency ablation needle system, and realize safer, accurate and more convenient surgical ablation treatment.

Drawings

FIG. 1 is a radio frequency ablation electrode needle system of the present invention;

FIG. 2 is a schematic structural diagram of a length adjustment unit in an embodiment;

FIG. 3 is a schematic structural diagram of an angle adjusting unit in the embodiment;

FIG. 4 is a perspective view of a portion of the steering ball and the angle adjusting unit in the embodiment;

FIG. 5 is a side view of the steering ball of the embodiment;

FIG. 6 is a schematic diagram of a bump structure in one embodiment

FIG. 7 is a schematic diagram of a part of the connecting line unit in the embodiment;

FIG. 8 is a schematic view of the structure of a negative electrode tab in the example;

the reference numerals in the figures denote:

10. an electrode needle unit; 11. a handle; 12. an outer sheath; 13. an electrode needle; 14. a needle tip portion; 15. a needle lumen;

20. a length adjustment unit; 21. a first knob; 22. scale lines; 23. an advancing and retreating mechanism;

30. an angle adjusting unit; 31. a first adjustment mechanism; 311. a second knob; 312. a first pull guidewire; 313. a first bump; 32. a second adjustment mechanism; 321. a third knob; 322. a second pull guidewire; 323. a second bump; 33. a steering ball; 331. a duct; 332. a first groove; 333. a second groove; 34. a first rotating shaft; 35. a second rotating shaft; 36. a reset member; 37. identifying an angle;

40. a connection line unit; 41. a first connecting pipe; 42. a first joint; 43. a second connecting pipe; 44. a second joint; 45. a positive electrode connecting wire; 46. a positive electrode tab; 47. an inflow pipe; 471. an inflow port; 472. an inflow identifier; 473. positioning clips; 48. an outflow tube; 481. an outflow port; 49. a negative terminal; 491. a fourth connecting line; 492. and (6) sticking an electrode.

The invention is described in detail below with reference to the drawings and the detailed description.

Detailed Description

The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.

The terms "upper", "lower", "front", "rear", "top", "bottom", and the like, as used herein, are used merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices or elements must be constructed and operated in a particular orientation, "inner", "outer" refers to the inner and outer of the corresponding component profiles, "front", "back" refers to the front and back of the corresponding component profiles, and the above terms are not to be construed as limiting the invention.

In the present invention, the terms "mounted," "connected," "fixed," and the like are used broadly, and may be, for example, fixedly connected, detachably connected, or integrated without being described to the contrary; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

The embodiment provides an ablation method of a radio frequency ablation electrode needle, which comprises the steps of performing ablation by using a radio frequency ablation electrode needle system, wherein the radio frequency ablation electrode needle system comprises an electrode needle unit 10, the electrode needle unit 10 comprises an electrode needle 13, a handle 11 and a sheath 12, the handle 11 and the sheath 12 are sleeved outside the electrode needle 13, the handle 11 and the sheath 12 are coaxially and sequentially connected, and the electrode needle 13 sequentially penetrates through the handle 11 and the sheath 12 and then extends out;

the electrode needle adjusting device further comprises a length adjusting unit 20 and an angle adjusting unit 30 which are connected with the electrode needle unit 10, wherein the length adjusting unit 20 adjusts the extending length of the electrode needle 13 during working;

the angle adjusting unit 30 includes a turning ball 33 disposed at an end of the sheath 12, a bore 331 through which the electrode needle 13 passes is disposed inside the turning ball 33, and the angle adjusting unit 30 further includes a first adjusting mechanism 31 and a second adjusting mechanism 32, wherein the first adjusting mechanism 31 and the second adjusting mechanism 32 are used for adjusting a rotation angle of the turning ball 33, so that the electrode needle 13 protrudes from the bore 331 at different angles.

In this embodiment, referring to fig. 5, the duct 331 is shaped like a trumpet, and the opening of the extending end of the electrode needle 13 is larger than the opening of the extending end of the electrode needle 13. This facilitates the angle adjustment and the smooth protrusion of the electrode needle 13.

Further, the first adjusting mechanism 31 includes a second knob 311, a first traction guide wire 312 connected to the second knob 311, and a first protrusion 313 connected to the first traction guide wire 312, the second knob 311 is disposed on the handle 11 in a penetrating manner, the first traction guide wire 312 is disposed between the outer sheath 12 and the electrode needle 13, and the second knob 311 rotates to pull the first traction guide wire 312 to make the first protrusion 313 rotate;

the second adjusting mechanism 32 includes a third knob 321, a second traction guide wire 322 and a second protrusion 323 which are connected in sequence, the third knob 321 and the second knob 311 are relatively arranged on the handle 11 in a penetrating manner, the arrangement manner of the second traction guide wire 322 and the second protrusion 323 is the same as that of the first traction guide wire 312 and the first protrusion 313, and the third knob 321 rotates to pull the second traction guide wire 322 to make the second protrusion 323 rotate.

With this arrangement, the first adjustment mechanism 31 and the second adjustment mechanism 32 can adjust the first protrusion 313 and the second protrusion 323 respectively, so that the protrusions can rotate in different directions.

Furthermore, the first shaft 34 is inserted into the first protrusion 313, the first protrusion 313 rotates around the first shaft 34, the second shaft 35 is inserted into the second protrusion 323, the second protrusion 323 rotates around the second shaft 35, and the axis of the first shaft 34 is perpendicular to the axis of the second shaft 35.

Specifically, the surface of the turning ball 33 is provided with a plurality of first grooves 332 matched with the first bump 313 and a plurality of second grooves 333 matched with the second bump 323;

the first protrusion 313 can be sequentially engaged with one of the first recesses 332 after rotating around the first shaft 34, and the second protrusion 323 can be sequentially engaged with one of the second recesses 333 after rotating around the second shaft 35.

With such an arrangement, the first protrusion 313 pokes one first groove 332 after rotating for one circle and then enters the next first groove 332, and then the next first groove 332 is poked by the rotation, so that the rotation of the first groove 332 is realized, that is, the turning ball 33 is rotated, similarly, the movement between the second protrusion 323 and the second groove 333 is also the same, so that the turning ball 33 is rotated with an angular offset, in this embodiment, the first protrusion 313 and the first groove 332 may be arranged so that the turning ball 33 is rotated in a vertical plane, and the second protrusion 323 and the second groove 333 may be arranged so that the turning ball 33 is rotated in a horizontal plane, and of course, according to actual conditions, the arrangement of the protrusion and the groove may be at any position on the turning ball 33, or multiple sets of matching protrusion and groove may be arranged.

Specifically, the reset piece 36 is disposed on each of the first bump 313 and the second bump 323. The reset element 36 may be a resilient reset component, such as a reset spring, and the purpose of the reset element 36 is to rotate the first protrusion 313 and the second protrusion 323 back in the opposite direction after the second knob 311 and the third knob 321 are rotated, for example, after the first protrusion 313 rotates clockwise, the first protrusion 313 rotates counterclockwise again under the action of the reset element 36, and further pokes the corresponding first groove 332 in the opposite direction, so as to reset the previously adjusted angle of the turning ball 33.

In one embodiment of the present invention, the length adjustment unit 20 includes a first knob 21 disposed on the electrode needle 13, and a retraction mechanism 23, wherein the first knob 21 is disposed outside the handle 11, and the retraction mechanism 23 is disposed inside the handle 11.

Specifically, the advancing-retreating mechanism 23 is a male screw, a female screw to be screwed with the male screw is provided inside the handle 11, and the advancing-retreating mechanism 23 and the handle 11 can be moved along the screwing axis by rotating the first knob 21. The length of the tip 14 of the electrode needle 13 projecting beyond the deflection ball 33 can thus be adjusted. The size of the ablation needle can be adjusted gradually and accurately within 0-40 mm compared with common fixed size type and hand-push type rough adjustment in the market. The problem of melt the scope difference risk that the needle size selection is improper caused the operation is solved, reduce the operation and melt the time, adjust the syringe needle size according to the operation process demand is nimble, realize more accurate, convenient operation.

With the arrangement, when the size of the working end needs to be increased in the operation process, if the first knob 21 is rotated anticlockwise, the advancing and retreating mechanism 23 moves forwards in the radial direction to drive the electrode needle 13 to move forwards along the pore 331 in the turning ball 33, and the length of the electrode needle 13 outside the turning ball 33 is increased; the first knob 21 is rotated clockwise, the advancing and retreating mechanism 23 retracts radially, and the electrode needle 13 is driven to retract towards the inside of the steering ball 33; the gradual change regulation and control of the working size of the ablation needle can be realized by adjusting the first knob 21 arranged outside, in order to realize the visual accurate regulation and control of the working length of the electrode needle 13, the working size mark of the electrode needle 13 is arranged at the handle 11, and the working length of the electrode needle 13 corresponds to the size scale mark 22 at the handle 11.

In one embodiment of the present invention, the rf ablation electrode needle system further includes a connection line unit 40 connected to the electrode needle unit 10, the connection line unit 40 includes a first connection pipe 41, a second connection pipe 43, and a positive connection line 45, a first connector 42 is disposed at an end of the first connection pipe 41, a second connector 44 is disposed at an end of the second connection pipe 43, and a positive connector 46 is disposed at an end of the positive connection line 45;

the electrode patch 492 is attached to a human body, a closed loop is formed by the whole system and the human body, and the radio frequency ablation operation process is completed.

Specifically, the inflow pipe 47 is provided with an inflow mark 472 and a positioning clip 473, the first knob 21 is provided with a graduation line 22, and the second knob 311 are both provided with an angle mark 37. The coolant flows into the electrode needle 13 through the inlet 471 of the inlet pipe 47, and finally flows out and is collected through the outlet 481 of the outlet pipe 48.

The setting of scale mark 22 can make things convenient for the operator to adjust the extension length of electrode needle 13, and the effect of angle sign 37 is the same, and in this embodiment, every recess of adjusting, corresponding angle sign 37 can be for every 5, and specifically also can adjust according to actual demand.

By the arrangement, the gradual change type accurate adjustment of the size of the working end of the ablation electrode needle 13 within 0-40 mm can be realized. In the operation process, the size of the ablation needle can be accurately adjusted to the optimal size according to the thickness of the area to be ablated, and the size can be adjusted and controlled more accurately and flexibly compared with the size fixing type and hand-push type rough adjustment and control of the ablation needle. The angle value of the scale mark 22 corresponding to the second knob 311 and the third knob 321 is the angle of the turning ball 33 in the radial/transverse direction, and the visual monitoring of the turning angle can be realized.

The use method of the radiofrequency ablation electrode needle system comprises the steps of adjusting the extending length of the electrode needle 13 during working through the length adjusting unit 20, adjusting the extending angle of the electrode needle 13 during working through the angle adjusting unit 30, wherein the axis of the extended electrode needle 13 is coaxial with the axis of the outer sheath 12 or forms an acute angle, and the acute angle is smaller than 60 degrees. The new channel direction is established by adjusting the steering ball 33, so that the precise regulation and control of the ablation needle angle within the range of 0-60 degrees are realized, the risks of damaging myocardial tissues and conducting bundles by the steering needle channel puncture in the operation process are reduced, the operation complications are reduced, the time is long, and the operation safety is improved.

The periphery of the needle wall of the ablation needle is coated with a layer of smooth and compact insulating coating material, preferably low-friction insulating coating materials such as TiN, CrN, TiAlN and the like prepared by a PVD method, so that the friction force between the needle wall and tissues is reduced; the needle point part 14 is made of amorphous nano carbon low-friction conductive material, so that the puncture friction resistance is integrally reduced, and the adhesion property is improved. Based on the fact that the steering ball 33 is also coated with the low-friction insulating coating material in the pore path 331, in order to reduce the friction resistance of the electrode needle 13 in the horn-shaped pore path 331 and improve the puncture convenience in the ball pore path 331, a layer of insulating and smooth antifriction material is coated in the ball horn-shaped pore path 331; the material is preferably a PTFE (polytetrafluoroethylene) material. In order to improve the flexibility and toughness of the electrode needle 13 material and maintain the rigidity and penetrability thereof, the needle body is preferably made of a titanium-nickel alloy (TiNi) material.

The radio frequency ablation electrode needle system 1 can realize steering control of the angle of a needle head in the operation process; 2. the size of the working end of the ablation needle head can be accurately adjusted in a gradual change manner; 3. the outer wall of the ablation needle and the needle tip part 14 are coated with novel antifriction coating materials, so that the myocardial puncture resistance is reduced, and the problems of ablation range error and the like caused by tissue adhesion are effectively solved

The embodiment discloses an ablation method of a radio frequency ablation electrode needle, which comprises the following examples: specifically, after the ablation of the ventricular septum I region is completed, the angle and the size of the ablation needle are required to be adjusted to perform the next region ablation. The angle adjustment requirement is as follows: the radial (vertical plane) rotates by 15 degrees and the transverse (horizontal plane) rotates by 20 degrees; electrode working size adjustment requirements: the diameter is changed from 30mm to 20 mm. The direction and length regulation and control process of the radio frequency ablation electrode needle system in the operation process is as follows:

(1) and finishing the ablation of the original ablation position, and ultrasonically confirming a new region to be ablated. The ablation of the ventricular septum I area is completed, and an operator determines the range of a target area to be ablated and the thickness of the ventricular wall through ultrasonic guidance.

(2) The working end of the ablation electrode needle retracts to the inner side of the steering ball 33. The first knob 21 is rotated to set the working end of the electrode needle 13 to be completely retracted to the inner side of the turning ball 33.

(3) And establishing a new direction of the ablation needle pore passage. The direction of the pore path 331 of the steering ball 33 is adjusted according to the area to be ablated again, and the adjustment can be realized by rotating the second knob 311 and the third knob 321. For example, the second knob 311 adjusts the radial angle of the steering ball 33, and when the second knob 311 is rotated to the angle line of 15 degrees, the radial cam toggles the groove to rotate 3 teeth, so as to drive the steering ball 33 to rotate 15 degrees in the radial direction; the third knob 321 is rotated to adjust the transverse angle of the steering ball 33, and the third knob 321 is rotated to 20 DEG angle line from the outside, and the ball rotates 20 DEG transversely. At this time, the new angle of the hole path 331 of the turning ball 33 is established, and the direction of the hole path 331 of the turning ball 33 is adjusted to be aligned with the target area to be ablated.

(4) The new angle and the length of the working end of the ablation needle are regulated and controlled. If the first knob 21 is rotated in the opposite direction, the needle tip 14 passes through the pore channel 331 with the new set direction to complete the direction change, the first knob 21 is rotated according to the wall thickness of the to-be-ablated area to adjust the size scale of the working end to 20mm, the circuit of the ablation system is switched on, and the operation treatment of the to-be-ablated area is continued.

If the ablation part needs to adjust the ablation angle and position again, the above operations can be repeatedly executed until the ablation of all target areas is completed.

The radio frequency ablation needle can complete the regulation and control of the direction and the size of the working end of the ablation needle through the knob operation of the external handheld part, and more accurate, safe and convenient operation treatment is realized.

The objects, technical solutions and advantages of the present invention are further described in the above embodiments, it should be noted that the above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of the various embodiments of the present disclosure can be made, and the same should be considered as the inventive content of the present disclosure, as long as the combination does not depart from the spirit of the present disclosure.

Claims

1. The ablation method of the radio frequency ablation electrode needle is characterized by comprising the steps of using the radio frequency ablation electrode needle system to perform ablation, wherein the radio frequency ablation electrode needle system comprises an electrode needle unit (10), the electrode needle unit (10) comprises an electrode needle (13), a handle (11) and an outer sheath (12), the handle (11) and the outer sheath (12) are sleeved outside the electrode needle (13), the handle (11) and the outer sheath (12) are coaxially and sequentially connected, and the electrode needle sequentially penetrates through the handle (11) and the outer sheath (12) and then extends out;

the electrode needle adjusting device is characterized by further comprising a length adjusting unit (20) and an angle adjusting unit (30) which are connected with the electrode needle unit (10), wherein the length adjusting unit (20) adjusts the extending length of the electrode needle (13) during working;

the angle adjusting unit (30) comprises a steering ball (33) arranged at the end part of the outer sheath (12), a pore channel (331) through which the electrode needle (13) passes is arranged inside the steering ball (33), the angle adjusting unit (30) further comprises a first adjusting mechanism (31) and a second adjusting mechanism (32), and the first adjusting mechanism (31) and the second adjusting mechanism (32) are used for adjusting the rotating angle of the steering ball (33) so that the electrode needle (13) extends out of the pore channel (331) at different angles;

the first adjusting mechanism (31) comprises a second knob (311), a first traction guide wire (312) connected with the second knob (311) and a first lug (313) connected with the first traction guide wire (312), the second knob (311) is arranged on the handle (11) in a penetrating mode, the first traction guide wire (312) is arranged between the outer sheath (12) and the electrode needle (13), and the second knob (311) can rotate to pull the first traction guide wire (312) to enable the first lug (313) to rotate;

the second adjusting mechanism (32) comprises a third knob (321), a second traction guide wire (322) and a second lug (323) which are sequentially connected, the third knob (321) and the second knob (311) are oppositely arranged on the handle (11) in a penetrating manner, the arrangement manner of the second traction guide wire (322) and the second lug (323) is the same as that of the first traction guide wire (312) and the first lug (313), and the third knob (321) can rotate to pull the second traction guide wire (322) to enable the second lug (323) to rotate;

the ablation method comprises the steps that the length adjusting unit (20) is used for adjusting the extending length of the electrode needle (13) during working, the angle adjusting unit (30) is used for adjusting the extending angle of the electrode needle (13) during working, the extending length of the needle point portion (14) of the electrode needle (13) is 0-40 mm, the axis of the electrode needle (13) after extending out is coaxial with the axis of the outer sheath (12) or forms an acute angle, and the acute angle is smaller than 60 degrees.

2. The ablation method of the radiofrequency ablation electrode needle as claimed in claim 1, wherein a first rotating shaft (34) penetrates through the first protrusion (313), the first protrusion (313) rotates around the first rotating shaft (34), a second rotating shaft (35) penetrates through the second protrusion (323), the second protrusion (323) rotates around the second rotating shaft (35), and the axis of the first rotating shaft (34) is perpendicular to the axis of the second rotating shaft (35).

3. The ablation method of the radiofrequency ablation electrode needle as claimed in claim 2, wherein the surface of the turning ball (33) is provided with a plurality of first grooves (332) matched with the first bump (313) and a plurality of second grooves (333) matched with the second bump (323);

the first lug (313) can be sequentially embedded with one first groove (332) when rotating around the first rotating shaft (34), and the second lug (323) can be sequentially embedded with one second groove (333) when rotating around the second rotating shaft (35).

4. The ablation method of the radiofrequency ablation electrode needle as claimed in claim 2, wherein the first projection (313) and the second projection (323) are both provided with a reset piece (36).

5. The ablation method of the radiofrequency ablation electrode needle as claimed in claim 2, wherein the length adjusting unit (20) comprises a first knob (21) sleeved on the electrode needle (13) and an advancing and retreating mechanism (23), the first knob (21) is arranged outside the handle (11), and the advancing and retreating mechanism (23) is arranged inside the handle (11).

6. The ablation method of the radiofrequency ablation electrode needle as recited in claim 5, wherein the advancing and retreating mechanism (23) is an external thread, an internal thread which is screwed with the external thread is provided inside the handle (11), and the advancing and retreating mechanism (23) and the handle (11) can be moved along a screwing axis by rotating the first knob (21).

7. The ablation method of the radio frequency ablation electrode needle according to claim 6, wherein the radio frequency ablation electrode needle system further comprises a connection line unit (40) connected with the electrode needle unit (10), the connection line unit (40) comprises a first connection pipe (41), a second connection pipe (43) and a positive connection line (45), a first joint (42) is arranged at the end of the first connection pipe (41), a second joint (44) is arranged at the end of the second connection pipe (43), and a positive joint (46) is arranged at the end of the positive connection line (45);

the electrode needle structure further comprises a coolant inflow pipe (47), a coolant outflow pipe (48) and a negative electrode connector (49), wherein the connector of the inflow pipe (47) is connected with the second connector (44) and used for sending the coolant into the needle cavity (15) of the electrode needle (13), and the connector of the outflow pipe (48) is connected with the first connector (42) and used for discharging the coolant.

8. The ablation method of the radiofrequency ablation electrode needle as claimed in claim 7, wherein an inflow mark (472) and a positioning clip (473) are arranged on the inflow pipe (47), a scale mark (22) is arranged on the first knob (21), and an angle mark (37) is arranged on each of the second knob (311) and the second knob (311).