CN209826960U - A cyst treatment device based on ablation - Google Patents

Abstract

The utility model provides a cyst treatment device based on ablation, including a puncture tube, a radio frequency conductive tube, an outer protective tube and a central guide rod; the puncture tube is inserted into the outer protective tube; the upper end of the puncture tube is provided with a The sealing end is provided with a negative pressure tube connected with the puncture tube; the radio frequency conductive tube is vertically inserted into the puncture tube after penetrating the sealing end; the upper end of the radio frequency conductive tube is provided with a radio frequency signal connection A radio frequency terminal is arranged at the lower end of the radio frequency conductive tube; the central guide rod is vertically inserted into the radio frequency conductive tube, and the central guide rod is provided with hardening agent injection holes along its axial direction. The ablation-based cyst treatment device uses a sclerosant injector to realize the quantitative injection of sclerosant; the arrangement of the sealed end and the negative pressure tube can facilitate the discharge of liquid in the cyst; the radio frequency ablation of the spherical lumen can be realized by using the radio frequency end .

Description

A cyst treatment device based on ablation

technical field

The invention relates to a cyst treatment device, especially a cyst treatment device based on ablation.

Background technique

At present, many solid organ cysts, such as liver cysts and renal cysts, have a relatively high incidence rate. Although they are benign diseases, they develop rapidly and can cause a series of damage and complications to the body. Surgical resection and fenestration are often performed. and other treatment methods, but the surgical trauma, cost more. In recent years, techniques such as image-guided puncture and injection of absolute alcohol or sclerosing agents have been used for less trauma, less cost, and faster recovery, but the secretion function of cyst wall cells is difficult to completely control, so it is easy to relapse, which has brought great therapeutic benefits to patients. Pain and trouble. Therefore, it is necessary to design a treatment method that can achieve surgical effects and cause minimal trauma to the body. We can use image-guided puncture to absorb cystic fluid, and use high-temperature ablation to destroy the secretion function of cystic wall cells, and inject sclerosing agents after ablation. The method is to completely eliminate the cyst, which can effectively reduce the treatment pain of tumor patients, and is beneficial to the recovery of patients, reduces the recurrence rate, and improves the curative effect.

Contents of the invention

The purpose of the present invention is to provide a cyst treatment device based on ablation, which can perform image-guided puncture to absorb cyst fluid, and use high temperature ablation to destroy the secretion function of cyst wall cells, and inject sclerosing agent after ablation to completely eliminate cyst fluid. Cyst can effectively reduce the pain of treatment for tumor patients, and is conducive to the recovery of patients, reducing the recurrence rate and improving the curative effect.

In order to achieve the purpose of the above invention, the invention provides a cyst treatment device based on ablation, including a puncture tube, a radio frequency conductive tube, an outer protective tube and a central guide rod; the puncture tube is inserted in the outer protective tube; the puncture tube The lower end of the nozzle is set as an oblique puncture port; the upper end of the puncture tube is provided with a sealing end, and a negative pressure tube connected with the puncture tube is arranged on the sealing end; the radio frequency conductive tube penetrates through the sealing end and vertical It is inserted into the puncture tube; the upper end of the radio frequency conductive tube is provided with a radio frequency signal access terminal, and the lower end of the radio frequency conductive tube is provided with a radio frequency terminal; the central guide rod is vertically inserted into the radio frequency conductive tube, and at the insertion position A sealing ring is arranged at the place, and a hardening agent injection hole is provided on the central guide rod along its axial direction.

Further, a hardening agent injector is also included; the hardening agent injector is butt-mounted on the upper end of the central guide rod, and communicates with the upper orifice of the hardening agent injection hole.

Further, the hardening agent injector includes a transparent liquid storage cylinder, a piston head and a piston rod; a liquid outlet pipe is arranged at one end of the transparent liquid storage cylinder, and an external thread for docking installation is provided on the outer wall of the liquid outlet pipe , a sealing ring is provided at the nozzle of the liquid outlet pipe; a push drive nut is provided at the other end of the transparent liquid storage cylinder; a push drive external thread is provided on the piston rod; the piston rod is installed by screwing the push drive external thread On the push drive nut; the piston head is rotatably installed on one end of the piston rod, and the other end of the piston rod is provided with a rotary drive handle; the piston head is embedded in the transparent liquid storage cylinder, and is connected with the transparent storage The inner cylinder wall of the liquid cylinder is close to each other; the liquid volume scale line is set on the outer cylinder wall of the transparent liquid storage cylinder; Butt threaded hole opposite to the liquid outlet pipe.

Further, a depth scale line is provided on the upper end of the central guide rod.

Further, the radio frequency terminal includes a fixed disc, a tension spring, a circular end and six radio frequency metal strips; the fixed disc is fixedly arranged on the lower end of the radio frequency conductive tube; the upper and lower ends of the six radio frequency metal strips are fixedly installed on the On the fixed disc and the circular end, and the upper ends of the six radio frequency metal strips are located at the sextant point of the circumferential edge of the lower side of the fixed disc, and the lower ends of the six radio frequency metal strips are located at the sixth equal point of the circumferential edge of the upper side of the circular end. point; the upper and lower ends of the extension spring are respectively fixedly installed at the center of the fixed disc and the circular end; the lower side of the circular end is set as an arc surface.

Further, the lower end of the central guide rod passes through the fixed disc and the extension spring in turn and is fixedly installed at the center of the upper side of the circular end; the central guide rod is a clearance fit at the penetration position of the fixed disc; A liquid outlet hole is arranged at the lower end and close to the circular end; the liquid outlet hole communicates with the hardening agent injection hole.

Further, a puncture trigger is installed on the puncture tube; the puncture trigger includes an excitation spring, a handle bar and a release mechanism; a support disc is fixedly arranged on the outer tube wall of the puncture tube; a slide is set in the middle of the handle bar Sleeve; the sliding sleeve is set on the upper end of the puncture tube, and the handle rod is located above the support disc; the excitation compression spring is set on the puncture tube, and the upper and lower ends are elastically supported between the handle bar and the support disc ;The release mechanism includes a rebound spring, a swing lever and an excitation lever; one end of the swing lever is hingedly mounted on the handle rod through a hinged seat; the other end of the swing lever is provided with a buckle that is buckled on the peripheral edge of the supporting disc Elbow; the trigger rod is vertically fixed in the middle of the swing rod; the rebound compression spring is elastically supported between the handle rod and the trigger rod, and the two ends are respectively fixed and installed by the limit post; the rebound compression spring pushes the trigger rod, so that the swing rod Oscillate at the support disc.

Further, an excitation limit external thread is provided on the outer wall of the upper end of the puncture tube; an excitation limit nut is threadedly mounted on the excitation limit external thread; the excitation limit nut is located above the upper nozzle of the sliding sleeve.

Further, a protective mounting seat is fixedly arranged on the handle bar, and a T-shaped mounting groove is provided on the protective mounting seat; a T-shaped protective block is inserted into the T-shaped mounting groove; a protective jack; the end of the excitation rod is inserted into the protective jack; two insulating limit rings are arranged on the inner wall of the puncture tube; the upper ring surface of the insulating limit ring is provided with a radio frequency conductive tube Conical non-return cover shrink-wrapped on the outer wall; the conical non-return cover is an elastic rubber structure, which is used to prevent liquid from flowing downward along the gap between the puncture tube and the radio frequency conductive tube.

Further, a limit supporter is installed on the outer protective tube; the limit supporter is composed of two clamping assemblies and a clamping spring; the clamping assembly is composed of a semicircular support plate, a clamping handle and a clamping arc plate; The center of the support plate is provided with a semicircular notch, and the diameter of the semicircular notch is greater than or equal to the outer diameter of the outer protective tube; the clamping handle is arranged on the semicircular support plate, and the clamping handle is formed by the The side is tilted up; there is a hinged installation block on the clamping handle, and the two clamping handles are installed together through the hinged installation block; the clamping arc plate is vertically arranged on the upper side of the semicircle support plate, and is located in the semicircle There is a rubber anti-skid pad on the inner arc surface of the clamping arc plate; there are positioning bosses on the opposite inner side of the two clamping handles, and the two ends of the clamping spring are installed on the two positioning bosses Above; the clamping spring pushes the tail ends of the two clamping handles to separate, so that the two semicircular support plates are combined into a circular support plate, and the two clamping arc plates are combined into a circular tube shape, and the outer wall of the tube is protected by a rubber anti-slip pad Perform clamping and fixing.

The invention has the beneficial effects of: using the hardening agent injector to realize the quantitative injection of the hardening agent; using the puncture stimulation trigger to perform puncture stimulation, and using the excitation limit nut to adjust the puncture depth; It is convenient for the liquid in the cyst to be discharged; the radio frequency ablation of the spherical inner cavity can be realized by using the radio frequency end.

Description of drawings

Fig. 1 is the partial cross-sectional structure schematic diagram created by the present invention;

Fig. 2 is the structural representation of the position-limiting support created by the present invention;

Fig. 3 is a schematic structural view of the curing agent injector created by the present invention.

Detailed ways

As shown in Figures 1-3, the cyst treatment device based on ablation provided by the present invention includes: a puncture tube 1, a radio frequency conductive tube 2, an outer protective tube 44 and a central guide rod 5; the puncture tube 1 is inserted into the outer protective tube 44 Middle; the lower end of the puncture tube 1 is set as a beveled puncture port 9; the upper end of the puncture tube 1 is provided with a sealing end 25, and a negative pressure connected to the puncture tube 1 is provided on the sealing end 25 Tube 26; the radio frequency conductive tube 2 is vertically inserted into the puncture tube 1 after penetrating the sealing end 25; the upper end of the radio frequency conductive tube 2 is provided with a radio frequency signal access terminal, and the lower end of the radio frequency conductive tube 2 is provided with a radio frequency terminal Head; the central guide rod 5 is vertically inserted into the radio frequency conductive tube 2, and a sealing ring is provided at the insertion position, and a hardening agent injection hole is provided on the central guide rod 5 along its axial direction. The puncture treatment can be realized by using the obliquely cut puncture port 9 without surgical treatment, which can effectively reduce the treatment pain of tumor patients, and is beneficial to the recovery of patients, reduces the recurrence rate, and improves the curative effect; The liquid in the cyst can be sucked out after puncture, which is convenient for subsequent ablation; the sclerosant injection hole on the central guide rod 5 can be used to facilitate the injection of sclerosant after ablation; the radio frequency conductive tube 2 can be used to realize the radio frequency signal to the radio frequency terminal pass around.

Further, a hardening agent injector is also included; the hardening agent injector is butt-mounted on the upper end of the central guide rod 5 and communicates with the upper orifice of the hardening agent injection hole.

Further, the hardener injector includes a transparent liquid storage cylinder 30, a piston head 33 and a piston rod 34; one end of the transparent liquid storage cylinder 30 is provided with a liquid outlet pipe 31, and on the outer tube wall of the liquid outlet pipe 31 There is an external thread for butt joint installation, and a sealing ring 32 is provided at the mouth of the liquid outlet pipe 31; a push drive nut 35 is provided at the other end of the transparent liquid storage cylinder 30; a push drive external thread is provided on the piston rod 34 36; the piston rod 34 is screwed and installed on the push drive nut 35 through the push drive external thread 36; the piston head 33 is rotatably mounted on one end of the piston rod 34, and is provided with a rotating Drive the handle 37; the piston head 33 is embedded in the transparent liquid storage cylinder 30, and is closely attached to the inner cylinder wall of the transparent liquid storage cylinder 30; the liquid volume scale is arranged on the outer cylinder wall of the transparent liquid storage cylinder 30 Line 38; a butt end 29 is provided on the upper end of the central guide rod 5, and a butt threaded hole connected with the liquid outlet pipe 31 is provided on the butt end 29. By utilizing the cooperation of the driving external thread 36 and the driving nut 35, the amount of expansion and contraction of the piston rod 34 can be accurately controlled, thereby effectively controlling the injection amount of the hardening agent.

Further, a depth scale line 28 is provided on the upper end of the central guide rod 5 . The size of the cyst cavity after ablation and contraction can be measured by using the depth scale line 28, because the insertion depth of the central guide rod 5 directly reflects the size of the ellipsoid supported by the six radio-frequency metal strips 4, and the inner wall of the cyst shrinks close to the six radio-frequency metal strips after ablation. Bar 4, so that it is convenient for the doctor to judge the amount of sclerosing agent injected.

Further, the radio frequency terminal includes a fixed disc 3, a tension spring 6, a circular end 7 and six radio frequency metal strips 4; the fixed disc 3 is fixedly arranged on the lower end of the radio frequency conductive tube 2; the six radio frequency metal strips 4 The upper and lower ends are fixedly installed on the fixed disk 3 and the circular end 7 respectively, and the upper ends of the six radio frequency metal strips 4 are located at the sextile point of the circumference edge of the lower side of the fixed disk 3, and the six radio frequency metal strips 4 The lower end is located at the sextile point of the upper side circumference edge of the circular terminal 7; The sides are set as arc surfaces. Utilizing the fixed disc 3 can realize the uniform distribution of the radio frequency signal to the six radio frequency metal strips 4; using the pull of the tension spring 6, the six radio frequency metal strips 4 can form an ellipsoidal support between the fixed disc 3 and the circular end 7 , so that the inner cavity of the cyst is propped up and the inner wall is close to the six radio frequency metal strips 4, which has a better ablation effect; setting the lower side of the circular end 7 as an arc surface can prevent the too sharp end surface from piercing the inner wall of the cyst.

Further, the lower end of the central guide rod 5 passes through the fixed disc 3 and the tension spring 6 in turn and is fixedly installed at the center of the upper side of the circular end 7; Matching; a liquid outlet 8 is provided at the lower end of the central guide rod 5 and near the circular end 7; the liquid outlet 8 communicates with the hardening agent injection hole. The liquid outlet hole 8 provided at the end can make the hardening agent start to inject the hardening agent from the bottom of the inner cavity of the cyst; the central guide rod can penetrate the extension spring 6 to play a telescopic guiding role for the extension spring 6, so that the six radio frequency metal strips 4 The supported ellipsoid cavity does not deflect.

Further, a puncture trigger is installed on the puncture tube 1; the puncture trigger includes an excitation compression spring 14, a handle bar 12 and a release mechanism; a support disc 13 is fixedly arranged on the outer tube wall of the puncture tube 1; The middle part of 12 is provided with a sliding sleeve 24; the sliding sleeve 24 is sleeved on the upper end of the puncture tube 1, and the handle bar 12 is located above the support disc 13; the exciting compression spring 14 is sleeved on the puncture tube 1, and The two ends are elastically supported between the handle rod 12 and the support disc 13; the release mechanism includes a rebound compression spring 21, a swing rod 15 and an excitation rod 17; one end of the swing rod 15 is swingably and hingedly mounted on the handle rod 12 through a hinge seat 27 The other end of the swing bar 15 is provided with a buckle elbow 16 that is buckled on the peripheral edge of the support disc 13; the excitation bar 17 is vertically fixed at the middle part of the swing bar 15; Between the excitation rods 17 , and at both ends are fixedly installed by the limiting bosses 20 ; Utilize the structure of support disc 13, swing lever 15 and buckle elbow 16 to realize the locking before excitation, and also can carry out buckle when rotating; There is a force of swinging to the support disc 13; the axial puncture slide of the puncture tube 1 can be facilitated by using the sliding sleeve 24.

Further, an excitation limiting external thread 23 is provided on the outer wall of the upper end of the puncture tube 1; an excitation limiting nut 22 is screwed on the excitation limiting external thread 23; above the upper nozzle. Utilizing the cooperation of the excitation limit external thread 23 and the excitation limit nut 22, the stroke amount of the puncture excitation can be limited, thereby effectively preventing the excitation puncture from being uncontrollable and ensuring the safety of use.

Further, the handle bar 12 is fixedly provided with a protective mounting seat 19, and a T-shaped mounting groove is provided on the protective mounting seat 19; a T-shaped protective block 18 is inserted into the T-shaped mounting groove; 18 is provided with a protective jack; the end of the excitation rod 17 is inserted into the protective jack; two insulating limit rings 10 are arranged on the inner wall of the puncture tube 1; on the upper side of the insulating limit ring 10 On the ring surface, there is a conical non-return cover 11 that shrinks and wraps toward the outer wall of the radio frequency conductive tube 2; . Utilizing the function of the protective mounting base 19 and the T-shaped protective block 18, the excitation rod 17 can be positioned when the puncture is not activated, preventing false triggering and ensuring the safety of use; The function of can prevent the liquid from flowing back down along the gap between the puncture tube 1 and the radio frequency conductive tube 2 .

Further, a limit supporter is installed on the outer protective tube 44; the limit supporter is composed of two clamping assemblies and a clamping spring 43; the clamping assembly consists of a semicircular support plate 39, a clamping handle 40 and a clamping arc plate 41 constitutes; a semicircle notch is provided at the center of the semicircle support plate 39, and the diameter of the semicircle notch is greater than or equal to the outer diameter of the outer protective tube 44; the clamping handle 40 is arranged on the semicircle support plate 39, and The clamping handle 40 is tilted upwards from the upper side of the semicircular support plate 39; the clamping handle 40 is provided with a hinged mounting block 45, and the two clamping handles 40 are mounted together through the hinged mounting block 45; the clamping arc plate 41 It is vertically arranged on the upper side of the semicircle support plate 39, and is located at the semicircle notch; a rubber anti-slip pad 42 is provided on the inner arc surface of the clamping arc plate 41; The inner sides are provided with positioning bosses 46, and the two ends of the clamping spring 43 are installed on the two positioning bosses 46; the clamping springs 43 push the tail ends of the two clamping handles 40 to separate, so that the two semicircular support plates 39 merge into one A circular support plate, two clamping arc-shaped plates 41 are merged into a circular tube shape, and the outer wall of the outer protection tube 44 is clamped and fixed by a rubber anti-skid pad 42 . The circular support plate formed by the limit supporter can be supported on the surface skin of the human body to effectively control the insertion depth; the function of the two clamping handles 40 can be used to conveniently adjust the fixed position of the support up and down.

When the ablation-based cyst treatment device provided by the present invention is in use, the insertion depth of the outer protective tube 44 is adjusted by the limit supporter, and the limit support is performed to facilitate the stability of subsequent ablation and injection of sclerosing agent; Use the hardening agent injector to realize the quantitative injection of hardening agent, and indicate the injection amount according to the liquid volume scale line 38; use the puncture stimulation device to perform puncture stimulation, and use the excitation limit nut 22 to adjust the puncture depth to ensure the safety of use; The setting of the sealing end 25 and the negative pressure tube 26 can facilitate the discharge of liquid in the cyst; the use of the radio frequency end can realize the radiofrequency ablation of the spherical inner cavity, which is closely attached to the inner wall of the cyst, and has a good ablation effect; the use of the depth scale line 28 can measure the size of the cyst cavity after ablation and shrinkage, because the insertion depth of the central guide rod 5 directly reflects the size of the ellipsoid propped up by the six radio frequency metal strips 4, which is convenient for the doctor to judge the amount of sclerosing agent injected.

Claims (10)

1. A cyst treatment device based on ablation, characterized in that: comprises a puncture tube (1), a radio frequency conductive tube (2), an outer protective tube (44) and a central guide rod (5); the puncture tube (1) is inserted in the outer protective tube (44); the lower end orifice of the puncture tube (1) is provided with a beveling puncture opening (9); a sealing end head (25) is arranged at the upper end orifice of the puncture tube (1), and a negative pressure tube (26) communicated with the puncture tube (1) is arranged on the sealing end head (25); the radio frequency conductive tube (2) penetrates through the sealing end (25) and then is vertically inserted into the puncture tube (1); a radio frequency signal access end is arranged at the upper end of the radio frequency conductive tube (2), and a radio frequency end is arranged at the lower end of the radio frequency conductive tube (2); the center guide rod (5) is vertically inserted into the radio frequency conductive tube (2), a sealing ring is arranged at the insertion position, and a hardening agent injection pore penetrates through the center guide rod (5) along the axial direction of the center guide rod.

2. The ablation-based cyst treatment device of claim 1, wherein: also includes a hardener injector; the hardener injector is butt-jointed and installed on the upper end part of the central guide rod (5) and is communicated with the upper opening of the hardener injection pore.

3. The ablation-based cyst treatment device of claim 2, wherein: the sclerosant injector comprises a transparent reservoir cylinder (30), a piston head (33) and a piston rod (34); a liquid outlet pipe (31) is arranged at one end of the transparent liquid storage cylinder (30), external threads are installed on the outer pipe wall of the liquid outlet pipe (31) in a butt joint mode, and a sealing ring (32) is arranged at the pipe orifice of the liquid outlet pipe (31); a propelling drive nut (35) is arranged at the other end of the transparent liquid storage cylinder (30); a push driving external thread (36) is arranged on the piston rod (34); the piston rod (34) is screwed on the propulsion drive nut (35) through the propulsion drive external thread (36); the piston head (33) is rotatably arranged on one end part of the piston rod (34), and a rotary driving handle (37) is arranged on the other end part of the piston rod (34); the piston head (33) is embedded in the transparent liquid storage cylinder (30) and is tightly attached to the inner cylinder wall of the transparent liquid storage cylinder (30); liquid level scale marks (38) are arranged on the outer cylinder wall of the transparent liquid storage cylinder (30); the upper end part of the central guide rod (5) is provided with a butt joint end head (29), and the butt joint end head (29) is provided with a butt joint threaded hole butted with the liquid outlet pipe (31).

4. The ablation-based cyst treatment device of claim 2, wherein: the upper end part of the central guide rod (5) is provided with a depth scale mark (28).

5. The ablation-based cyst treatment device of claim 1, wherein: the radio frequency end comprises a fixed disc (3), a tension spring (6), a round end (7) and six radio frequency metal strips (4); the fixed disc (3) is fixedly arranged on the lower end part of the radio frequency conductive tube (2); the upper end and the lower end of the six radio frequency metal strips (4) are respectively fixedly arranged on the fixed disc (3) and the circular end head (7), the upper ends of the six radio frequency metal strips (4) are positioned at 1 six equal points of the circumferential edge of the lower side surface of the fixed disc (3), and the lower ends of the six radio frequency metal strips (4) are positioned at six equal points of the circumferential edge of the upper side surface of the circular end head (7); the upper end and the lower end of the tension spring (6) are respectively and fixedly arranged at the centers of the fixed disc (3) and the round end head (7); the lower side surface of the round end (7) is provided with a circular arc surface.

6. The ablation-based cyst treatment device of claim 5, wherein: the lower end part of the central guide rod (5) penetrates through the fixed disc (3) and the tension spring (6) in sequence and then is fixedly arranged at the center of the upper side surface of the round end head (7); the central guide rod (5) is in clearance fit at the penetrating position of the fixed disc (3); a liquid outlet hole (8) is arranged at the lower end part of the central guide rod (5) and close to the round end head (7); the liquid outlet hole (8) is communicated with the hardening agent injection pore.

7. The ablation-based cyst treatment device of claim 1, wherein: a puncture exciter is arranged on the puncture tube (1); the puncture exciter comprises an exciting pressure spring (14), a handle rod (12) and a release mechanism; a support disc (13) is fixedly arranged on the outer tube wall of the puncture tube (1); a sliding sleeve (24) is arranged in the middle of the handle rod (12); the sliding sleeve (24) is sleeved on the upper end part of the puncture tube (1), and the handle rod (12) is positioned above the supporting disc (13); the excitation compression spring (14) is sleeved on the puncture tube (1), and the upper end and the lower end of the excitation compression spring are elastically supported between the handle rod (12) and the supporting disc (13); the release mechanism comprises a rebound pressure spring (21), a swinging rod (15) and an excitation rod (17); one end of the swing rod (15) is installed on the handle rod (12) through a hinge seat (27) in a swing hinge mode; a buckle elbow (16) buckled on the circumferential edge of the supporting disc (13) is arranged at the other end of the swinging rod (15); the excitation rod (17) is vertically fixed in the middle of the swing rod (15); the rebound pressure spring (21) is elastically supported between the handle rod (12) and the excitation rod (17), and two ends of the rebound pressure spring are respectively fixedly installed through the limiting convex columns (20); the rebounding pressure spring (21) pushes the excitation rod (17) to enable the swinging rod (15) to swing towards the supporting disk (13).

8. The ablation-based cyst treatment device of claim 7, wherein: an excitation limiting external thread (23) is arranged on the outer wall of the upper end of the puncture tube (1); an excitation limit nut (22) is screwed on the excitation limit external thread (23); the excitation limiting nut (22) is positioned above the upper pipe orifice of the sliding sleeve pipe (24).

9. The ablation-based cyst treatment device of claim 7, wherein: a protective mounting seat (19) is fixedly arranged on the handle rod (12), and a T-shaped mounting groove is arranged on the protective mounting seat (19); a T-shaped protection block (18) is inserted on the T-shaped mounting groove; a protective jack is arranged on the T-shaped protective block (18); the end part of the excitation rod (17) is inserted in the protection jack; two insulating limit rings (10) are arranged on the inner side tube wall of the puncture tube (1); a conical non-return cover (11) which is shrunk and wrapped towards the outer wall of the radio frequency conductive tube (2) is arranged on the upper side annular surface of the insulation limiting ring (10); the conical non-return cover (11) is of an elastic rubber structure and is used for preventing liquid from flowing downwards along a gap between the puncture tube (1) and the radio frequency conductive tube (2).

10. The ablation-based cyst treatment device of claim 1, wherein: a limit support is arranged on the outer protective tube (44); the limiting support consists of two clamping components and a clamping spring (43); the clamping assembly consists of a semicircular supporting plate (39), a clamping handle (40) and a clamping arc-shaped plate (41); a semicircular notch is formed in the circle center of the semicircular supporting plate (39), and the diameter of the semicircular notch is larger than or equal to the outer diameter of the outer protecting pipe (44); the clamping handle (40) is arranged on the semicircular supporting plate (39), and the clamping handle (40) is tilted upwards from the upper side of the semicircular supporting plate (39); the clamping handles (40) are provided with hinged mounting blocks (45), and the two clamping handles (40) are mounted together through the hinged mounting blocks (45); the clamping arc-shaped plate (41) is vertically arranged on the upper side surface of the semicircular supporting plate (39) and is positioned at the semicircular groove; a rubber anti-skid pad (42) is arranged on the inner arc surface of the clamping arc plate (41); positioning convex columns (46) are arranged on the opposite inner sides of the two clamping handles (40), and two ends of the clamping spring (43) are arranged on the two positioning convex columns (46); the clamping spring (43) pushes the tail ends of the two clamping handles (40) to separate, so that the two semicircular supporting plates (39) are combined into a circular supporting plate, the two clamping arc-shaped plates (41) are combined into a circular tube shape, and the outer wall of the outer protective tube (44) is clamped and fixed by the rubber anti-skid pad (42).