CN114129256B

CN114129256B - Ablation method of radio frequency ablation electrode needle

Info

Publication number: CN114129256B
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: 2023-06-30
Anticipated expiration: 2041-11-10
Also published as: CN114129256A

Abstract

The invention discloses an ablation method of a radio frequency ablation electrode needle, which comprises the steps of using a radio frequency ablation electrode needle system to perform 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 which 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 stretches out; the electrode needle unit is connected with the electrode needle through the length adjusting unit; the angle adjusting unit comprises a steering ball arranged at the end part of the outer sheath, a pore canal for the electrode needle to penetrate is formed in the steering ball, and the angle adjusting unit further comprises a first adjusting mechanism and a second adjusting mechanism, wherein the first adjusting mechanism and the second adjusting mechanism are used for adjusting the rotation angle of the steering ball, so that the electrode needle stretches out from the pore canal at different angles. The length and the angle of the working end are adjustable, and the damage to myocardial tissues and conductive bundles caused by multiple punctures can be reduced.

Description

Ablation method of radio frequency ablation electrode needle

Technical Field

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

Background

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

In recent years, liwen's surgical innovation has provided a new solution for HCM therapy as a new route for cardiac disease intervention. Under the guidance of ultrasonic real time, the radio frequency needle is penetrated through skin and heart muscle to reach the cardiac hypertrophy position with thickness not less than 15mm, and the high frequency alternating current from the working end of the radio frequency electrode needle is used to rub the ions in cardiac tissue cells to produce heat at local temperature over 80 deg.c to dewater the cardiac tissue cells around the electrode needle to produce irreversible coagulation necrosis of tissue cells, thin the ventricular thickness, wide left outflow tract inside diameter and other advantages.

However, the existing radio frequency ablation needle is mainly used for minimally invasive treatment of liver, thyroid and other parenchymal organs and tumors, the minimally invasive treatment of myocardial tissues belongs to the clinical trial exploration stage, and few radio frequency ablation needles for treating hypertrophic cardiomyopathy mainly have the following problems during ablation:

(1) At present, since the ablation needle for the market is fixed and not rotatable, the needle way is required to be changed for a plurality of times to realize the change of the direction of the needle when the ablation position is changed, and the operation time is easy to be prolonged; meanwhile, since the heart is different from other organs, myocardial tissues are distributed with conducting bundles and coronary blood vessels, multiple needle transfer channel punctures are easy to cause damage of extra cardiac muscles, conducting systems and coronary artery interval branches, and risks of serious complications such as conduction block, surface tear injury of the heart, pericardial effusion and even pericardial packing are increased.

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

(3) The ablation needle has larger resistance in the process of puncturing myocardial tissue by the surgical transformation needle track. At present, most of ablation needles and puncture needles used in the medical market are made of 304/316 stainless steel, the surface roughness Ra0.4 is about, the friction coefficient is large, the friction force between the needle wall and myocardial tissue is large, and tissue adhesion is easy to occur; in the ablation process, human body organic matters such as tissue, protein and the like adhered to the needle wall are easy to generate tissue carbonization in the continuous heating process, and the carbonized tissue wraps the electrode needle, so that the conduction of alternating current to peripheral myocardial tissue is blocked, and the ablation range is too small; the carbonized tissue wrapped by the synchronous ablation needle is easy to cause overhigh impedance of myocardial tissue around the main machine test needle head, so that false dormancy misjudged by an ablation system occurs, and the error of the ablation range is increased and the ablation stability is reduced as a whole.

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 above purpose, the invention adopts the following technical scheme:

the radiofrequency ablation electrode needle system comprises an electrode needle unit, wherein 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 stretches out;

the electrode needle unit is connected with the electrode needle through the length adjusting unit, and the electrode needle unit is connected with the electrode needle through the angle adjusting unit;

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

Further, 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 mode, the first traction guide wire is arranged between the outer sheath and the electrode needle, and the first traction guide wire can be pulled by rotation of the second knob so that the first lug can do rotary motion;

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 manner, 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 rotate to traction the second traction guide wire so that the second bump can rotate;

the ablation method comprises the steps of adjusting the extending length of the electrode needle during operation through the length adjusting unit, adjusting the extending angle of the electrode needle during operation through the angle adjusting unit, wherein the extending length of the needle tip part of the electrode needle is 0-40 mm, the axis of the electrode needle after extending is coaxial with the axis of the outer sheath or forms an acute angle, and the acute angle is smaller than 60 degrees.

Furthermore, the first lug is internally provided with a first rotating shaft in a penetrating way, the first lug is in rotating motion around the first rotating shaft, the second lug is internally provided with a second rotating shaft in a penetrating way, the second lug is in rotating motion around the second rotating shaft, and the axis of the first rotating shaft is mutually perpendicular to the axis of the second rotating shaft.

Specifically, the steering ball surface is provided with a plurality of first grooves matched with the first convex blocks and a plurality of second grooves matched with the second convex blocks;

the first protruding block can be sequentially embedded with one first groove when rotating around the first rotating shaft for every circle, and the second protruding block can be sequentially embedded with one second groove when rotating around the second rotating shaft for every circle.

Specifically, reset pieces are arranged on the first lug and the second lug.

Further, the length adjusting unit comprises a first knob and a driving and reversing mechanism, wherein the first knob is sleeved on the electrode needle, the first knob is arranged outside the handle, and the driving and reversing mechanism is arranged inside the handle.

Specifically, the driving and reversing mechanism is an external thread, an internal thread which is screwed with the external thread is arranged in the handle, and the driving and reversing mechanism and the handle can move along a screwing axis by rotating the first knob.

Further, the radio frequency ablation electrode needle system further comprises a connecting wire unit connected with the electrode needle unit, the connecting wire unit comprises a first connecting pipe, a second connecting pipe and a positive electrode connecting wire, a first joint is arranged at the end part of the first connecting pipe, a second joint is arranged at the end part of the second connecting pipe, and a positive electrode joint is arranged at the end part of the positive electrode connecting wire;

the electrode needle also comprises an inflow pipe, an outflow pipe and a negative electrode joint of the cooling liquid, wherein the joint of the inflow pipe is connected with the second joint and used for sending the cooling liquid into the needle cavity of the electrode needle, and the joint of the outflow pipe is connected with the first joint and used for discharging the cooling liquid.

Specifically, inflow identification and a locating clamp are arranged on the inflow pipe, scale marks are arranged on the first knob, and angle identification is arranged on the second knob and the second knob.

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

the ablation method of the radiofrequency ablation electrode needle has the function of adjusting the extending length of the working end of the ablation electrode 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 myocardial tissues and conductive bundles caused by multiple punctures can be reduced; the length of the working end of the ablation needle can be adjusted gradually and continuously, so that the surgical risk caused by overlong surgical 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 and the length of the working end of the ablation needle by regulating and controlling the external control system of the radiofrequency ablation needle system, and realize safer, more accurate and more convenient surgical ablation treatment.

Drawings

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

FIG. 2 is a schematic diagram of the structure of a length adjusting unit in the embodiment;

FIG. 3 is a schematic view of the structure of an angle adjusting unit in the embodiment;

FIG. 4 is a schematic view showing a partial perspective structure of the steering ball and the angle adjusting unit in the embodiment;

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

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

Fig. 7 is a schematic view of a part of the structure of a connection line unit in the embodiment;

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

the reference numerals in the drawings denote:

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

20. a length adjusting unit; 21. a first knob; 22. scale marks; 23. a driving and reversing mechanism;

30. an angle adjusting unit; 31. a first adjustment mechanism; 311. a second knob; 312. a first traction guide wire; 313. a first bump; 32. a second adjustment mechanism; 321. a third knob; 322. a second traction guide wire; 323. a second bump; 33. steering balls; 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. an angle mark;

40. a connection line unit; 41. a first connection pipe; 42. a first joint; 43. a second connection pipe; 44. a second joint; 45. a positive electrode connecting wire; 46. a positive electrode joint; 47. an inflow tube; 471. an inflow port; 472. inflow identification; 473. a positioning clamp; 48. an outflow tube; 481. an outflow port; 49. a negative electrode joint; 491. a fourth connecting line; 492. and (5) electrode paste.

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

Detailed Description

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

The terms "upper," "lower," "front," "rear," "top," "bottom," and the like are used herein to refer to an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, "inner," "outer," "interior," "exterior," and "mean both the interior and exterior of the respective component profiles," front, "" back, "and" front and back "of the respective component profiles, respectively, and the above terms should not be construed as limiting the invention.

In the present invention, unless otherwise indicated, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

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 which 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 stretches out;

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

the angle adjusting unit 30 includes a steering ball 33 disposed at an end of the outer sheath 12, a hole 331 through which the electrode needle 13 passes is disposed inside the steering 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 steering ball 33, so that the electrode needle 13 extends from the hole 331 at different angles.

In this embodiment, with reference to fig. 5, the aperture 331 is horn-like and the opening at the projecting end of the electrode needle 13 is larger than the opening at the projecting end of the electrode needle 13. This facilitates the angular adjustment and the smooth extension of the electrode needle 13.

Further, the first adjusting mechanism 31 includes a second knob 311, a first traction wire 312 connected to the second knob 311, and a first protrusion 313 connected to the first traction wire 312, the second knob 311 is disposed on the handle 11 in a penetrating manner, the first traction wire 312 is disposed between the sheath 12 and the electrode needle 13, and rotation of the second knob 311 can pull the first traction wire 312 to make the first protrusion 313 perform a rotational movement;

the second adjusting mechanism 32 includes a third knob 321, a second traction guiding wire 322 and a second protruding block 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 guiding wire 322 and the second protruding block 323 is the same as that of the first traction guiding wire 312 and the first protruding block 313, and the third knob 321 can rotate to traction the second traction guiding wire 322 so that the second protruding block 323 can rotate.

So configured, the first adjustment mechanism 31 and the second adjustment mechanism 32 can respectively adjust the first bump 313 and the second bump 323, so that the bumps rotate in different directions.

Further, the first protrusion 313 is internally threaded with the first rotating shaft 34, the first protrusion 313 is rotatably moved around the first rotating shaft 34, the second protrusion 323 is internally threaded with the second rotating shaft 35, the second protrusion 323 is rotatably moved 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.

Specifically, the steering ball 33 is provided on its surface with a plurality of first grooves 332 matching the first protrusions 313 and a plurality of second grooves 333 matching the second protrusions 323;

the first protrusion 313 can be sequentially engaged with one first groove 332 per rotation of the first rotation shaft 34, and the second protrusion 323 can be sequentially engaged with one second groove 333 per rotation of the second rotation shaft 35.

So configured, after the first protrusion 313 rotates one circle, it dials one first groove 332 and then enters the next first groove 332, and then rotates to dial the next first groove 332, so as to realize rotation of the first groove 332, and also rotate the steering ball 33, and similarly, the movement between the second protrusion 323 and the second groove 333 also rotates the steering ball 33, and there is an angle offset, in this embodiment, the first protrusion 313 and the first groove 332 may be configured to enable the steering ball 33 to rotate on a vertical plane, and the second protrusion 323 and the second groove 333 may be configured to enable the steering ball 33 to rotate on a horizontal plane, or, according to practical situations, the protrusion and the groove may be configured at any position on the steering ball 33, or multiple sets of matched protrusions and grooves may be configured.

Specifically, the reset element 36 is disposed on each of the first bump 313 and the second bump 323. The reset element 36 may be an elastic reset element, such as a reset spring, where the reset element 36 is configured to rotate the second knob 311 and the third knob 321, and then the first protrusion 313 and the second protrusion 323 can rotate back in the opposite direction after rotating the second knob 311 and the third knob 321, 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 then toggles the corresponding first groove 332 in the opposite direction, so that the angle of the steering ball 33 adjusted before is reset again.

In one embodiment of the present invention, the length adjusting unit 20 includes a first knob 21 and a advancing and retreating mechanism 23 that are sleeved on the electrode needle 13, the first knob 21 is provided outside the handle 11, and the advancing and retreating mechanism 23 is provided inside the handle 11.

Specifically, the driving and reversing mechanism 23 is an external thread, an internal thread which is screwed with the external thread is provided in the handle 11, and the driving and reversing mechanism 23 and the handle 11 can be moved along the screwing axis by rotating the first knob 21. This allows the length of the tip portion 14 of the electrode needle 13 extending beyond the steering ball 33 to be adjusted. Compared with the common fixed-size type and hand-push type rough adjustment of the size of the ablation needle in the market, the gradual change type precise adjustment within 0-40 mm can be realized. The problem that the ablation needle size is unsuitable for selecting the ablation scope difference risk caused to the operation is solved, the operation ablation time is reduced, the needle size is flexibly adjusted according to the operation process requirement, and more accurate and convenient operation is realized.

So configured, when the surgical procedure requires an increase in the size of the working end, such as rotating the first knob 21 counterclockwise, the advancing and retreating mechanism 23 moves radially forward, driving the electrode needle 13 to move forward along the inner channel 331 of the steering ball 33, and the length of the electrode needle 13 outside the steering ball 33 increases; rotating the first knob 21 clockwise, the advancing and retreating mechanism 23 radially retracts, and the electrode needle 13 is driven to retract towards the inside of the steering ball 33; gradual change regulation and control of the working size of the ablation needle can be realized by adjusting a first knob 21 arranged outside, in order to realize visual accurate regulation and control of the working length of the electrode needle 13, a 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 a size scale mark 22 at the handle 11.

In one embodiment of the present invention, the radiofrequency 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 line 41, a second connection line 43 and a positive electrode connection line 45, the end of the first connection line 41 is provided with a first joint 42, the end of the second connection line 43 is provided with a second joint 44, and the end of the positive electrode connection line 45 is provided with a positive electrode joint 46;

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

Specifically, the inflow tube 47 is provided with an inflow mark 472 and a positioning clip 473, the first knob 21 is provided with scale marks 22, and the second knob 311 are provided with angle marks 37. The coolant flows into the electrode needle 13 from the inflow port 471 of the inflow tube 47, and finally flows out and is recovered from the outflow port 481 of the outflow tube 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 5 for every, specifically also can adjust according to actual demand.

By the arrangement, gradual accurate adjustment of the working end of the ablation electrode needle 13 within 0-40 mm can be realized. In the operation process, the thickness of the area to be ablated can be accurately adjusted to the optimal size of the ablation needle, and the size adjustment and control can be more accurate and flexible relative to the fixed size and hand-push type rough adjustment and control of the size of the ablation needle. The scale mark 22 angle values corresponding to the second knob 311 and the third knob 321 are the angle formed by the steering ball 33 in the radial/transverse direction, so that the visual monitoring of the rotation angle can be realized.

The application method of the radiofrequency ablation electrode needle system comprises the steps of adjusting the extending length of the electrode needle 13 during operation through the length adjusting unit 20, adjusting the extending angle of the electrode needle 13 during operation through the angle adjusting unit 30, and enabling the axis of the electrode needle 13 after extending to be coaxial with the axis of the outer sheath 12 or form an acute angle, wherein the acute angle is smaller than 60 degrees. By adjusting the steering ball 33 to establish a new channel direction, the precise regulation and control of the angle of the ablation needle within the range of 0-60 degrees is realized, the risk of damaging myocardial tissues and conducting bundles in the process of operation by changing the direction of needle channel puncture is reduced, the complication of operation is 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 TiN, crN, tiAlN and other low-friction insulating coating materials prepared by adopting a PVD method, so that the friction force between the needle wall and tissues is reduced; the needle tip 14 is made of amorphous nano carbon low-friction conductive material, so that the puncture friction resistance is reduced as a whole, and the adhesion characteristic is improved. Based on the fact that the steering ball 33 is also coated with the low-friction insulating coating material in the pore canal 331, in order to reduce the friction resistance of the electrode needle 13 in the trumpet-shaped pore canal 331 and improve the puncture convenience, a layer of insulating and smooth antifriction material is coated in the ball trumpet-shaped pore canal 331; the material is preferably a PTFE (polytetrafluoroethylene) material. In order to improve the flexibility and toughness of the electrode needle 13 material and to maintain the rigidity and piercing property, the needle body is preferably made of titanium-nickel alloy (TiNi) material.

The radiofrequency ablation electrode needle system 1 can realize the steering control of the needle angle in the operation process; 2. the size of the working end of the ablation needle can be adjusted in a precise gradual change mode; 3. the outer wall of the ablation needle and the needle tip 14 are coated with the novel antifriction coating material, so that the myocardial puncture resistance is reduced, and the problems of ablation range errors 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, the angle and the size of the ablation needle are required to be adjusted to perform the next area ablation after the ablation needle finishes the ventricular septum I area ablation. The angle adjustment requires: radial (vertical plane) rotation 15 °, lateral (horizontal plane) rotation 20 °; electrode working size adjustment requirements: the diameter is changed from 30mm to 20mm. 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 (5) completing the ablation of the original ablation position, and ultrasonically confirming a new area to be ablated. And (3) finishing ablation of the compartment interval I region, and determining the range of a target area to be ablated and the thickness of the compartment wall by an operator through ultrasonic guidance.

(2) The working end of the ablation electrode needle is retracted inside the steering ball 33. The first knob 21 is rotated to set the working end of the electrode needle 13 fully retracted inside the steering ball 33.

(3) A new direction of the ablation needle track is established. The direction of the hole 331 of the steering ball 33 is adjusted according to the area to be ablated again, and the second knob 311 is rotated and the third knob 321 is rotated to adjust the area to be ablated. For example, the second knob 311 adjusts the radial angle of the steering ball 33, and the radial cam rotates the groove 3 teeth to drive the steering ball 33 to rotate 15 ° radially when rotating the second knob 311 to 15 ° angle line; rotating the third knob 321 adjusts the lateral angle of the steering ball 33, and externally rotating the third knob 321 to an angle line of 20 ° with the ball laterally rotated 20 °. At this time, the new angle of the hole 331 of the steering ball 33 is established, and the direction of the hole 331 of the steering ball 33 is adjusted to be aligned with the target area to be ablated.

(4) And regulating and controlling the new angle and the length of the working end of the ablation needle. If the first knob 21 is rotated in the opposite direction, the needle tip 14 passes through the hole 331 with the new setting direction to complete the direction conversion, the first knob 21 is rotated according to the thickness of the wall of the area to be ablated to adjust the size scale of the working end to 20mm, the ablation system circuit is connected, and the operation treatment is continued on the area to be ablated.

If the ablation part needs to adjust the ablation angle and the position again, the operation can be repeatedly executed until all target areas need to be ablated.

According to the radio frequency ablation needle, the direction and the working end size of the ablation needle can be regulated and controlled through the knob operation of the external handheld part, and more accurate, safe and convenient operation treatment is realized.

While the foregoing is directed to the embodiments, aspects and advantages of the present invention, other and further details of the invention may be had by the foregoing description, it should be understood that the invention is not limited to the particular embodiments disclosed, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination of the various embodiments of the present disclosure may be made without departing from the spirit of the present disclosure, which should also be considered as the subject matter of the invention of the present disclosure.

Claims

1. The ablation method of the radiofrequency ablation electrode needle is characterized by comprising the step of performing ablation by using a radiofrequency ablation electrode needle system, wherein the radiofrequency ablation electrode needle system comprises an electrode needle unit (10), the electrode needle unit (10) comprises an electrode needle (13) and a handle (11) and a sheath (12) which are sleeved outside the electrode needle (13), the handle (11) and the sheath (12) are coaxially and sequentially connected, and the electrode needle sequentially penetrates through the handle (11) and the sheath (12) and then stretches out;

the electrode needle 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) when in operation;

the angle adjusting unit (30) comprises a steering ball (33) arranged at the end part of the outer sheath (12), a pore canal (331) for the electrode needle (13) to penetrate is arranged in 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 rotation angle of the steering ball (33) so that the electrode needle (13) extends out of the pore canal (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 traction the first traction guide wire (312) to enable the first lug (313) to do rotary motion;

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 mode, the arrangement mode 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 traction the second traction guide wire (322) so that the second lug (323) can rotate;

the ablation method comprises the steps of adjusting the extending length of the electrode needle (13) when in operation through the length adjusting unit (20), adjusting the extending angle of the electrode needle (13) when in operation through the angle adjusting unit (30), wherein the extending length of the needle tip (14) of the electrode needle (13) is 0-40 mm, and the axis of the electrode needle (13) after extending 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 radio frequency ablation electrode needle according to claim 1, wherein a first rotating shaft (34) is penetrated inside the first protruding block (313), the first protruding block (313) rotates around the first rotating shaft (34), a second rotating shaft (35) is penetrated inside the second protruding block (323), the second protruding block (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 a radiofrequency ablation electrode needle according to claim 2, characterized in that the steering ball (33) surface is provided with a plurality of first grooves (332) matching the first bumps (313) and a plurality of second grooves (333) matching the second bumps (323);

the first protruding block (313) can be sequentially embedded with one first groove (332) every time the first protruding block rotates around the first rotating shaft (34), and the second protruding block (323) can be sequentially embedded with one second groove (333) every time the second protruding block rotates around the second rotating shaft (35).

4. The method of ablating a radio frequency ablation electrode needle according to claim 2, wherein a reset element (36) is provided on each of said first bump (313) and said second bump (323).

5. The ablation method of a radiofrequency ablation electrode needle according to claim 2, characterized in that the length adjustment unit (20) comprises a first knob (21) and a driving and reversing mechanism (23) which are sleeved on the electrode needle (13), the first knob (21) is arranged outside the handle (11), and the driving and reversing mechanism (23) is arranged inside the handle (11).

6. The ablation method of the radio frequency ablation electrode needle according to claim 5, wherein the advancing and retreating mechanism (23) is an external thread, an internal thread which is screwed with the external thread is arranged inside the handle (11), and the first knob (21) is rotated to enable the advancing and retreating mechanism (23) and the handle (11) to move along a screwing axis.

7. The ablation method of a radiofrequency ablation electrode needle according to claim 6, characterized in that the radiofrequency ablation electrode needle system further comprises a connection line unit (40) arranged in connection with the electrode needle unit (10), the connection line unit (40) comprising a first connection line (41), a second connection line (43) and a positive connection line (45), the end of the first connection line (41) being provided with a first joint (42), the end of the second connection line (43) being provided with a second joint (44), the end of the positive connection line (45) being provided with a positive joint (46);

the electrode needle also comprises an inflow pipe (47), an outflow pipe (48) and a negative electrode joint (49) of the cooling liquid, wherein the joint of the inflow pipe (47) is connected with the second joint (44) and used for feeding the cooling liquid into the needle cavity (15) of the electrode needle (13), and the joint of the outflow pipe (48) is connected with the first joint (42) and used for discharging the cooling liquid.

8. The ablation method of the radio frequency ablation electrode needle according to claim 7, wherein an inflow mark (472) and a positioning clamp (473) are arranged on the inflow tube (47), graduation marks (22) are arranged on the first knob (21), and angle marks (37) are arranged on the second knob (311) and the second knob (311).