Endoscopic pancreatic radiofrequency ablation catheter

Abstract

The present invention relates to the technical field of ablation catheters, specifically to an endoscopic pancreatic radiofrequency ablation catheter. A plurality of groups of folded air tubes fixed on the arc-shaped inner wall of a heat transfer arc plate are arranged at the upper end of a supporting gas plate. The lower end of the folded air tubes is connected to the inner cavity of the supporting gas plate. An air pump for controlling the airflow in the air tube is arranged in a control handle. The beneficial effects are as follows: by adding an air tube and a heat transfer arc plate to an existing catheter, expansion is achieved by utilizing the air tube, and then the heat transfer arc plates distributed in a circular array are expanded outward, thereby forming intervals at the contact layer position, thereby achieving intermittent heating during circumferential contact heating and drying. At the same time, a heat insulation layer is used to wrap the heating block to reduce the conduction temperature of the catheter, thereby avoiding excessive heating caused by direct contact. In combination with the heat transfer of a heat conductive ring, accurate and convenient temperature control is achieved, thereby greatly reducing the difficulty of operation.

Description

Technical Field

[0001] The invention relates to the technical field of ablation catheters, in particular to an endoscopic pancreatic radiofrequency ablation catheter. Background Art

[0002] Radiofrequency catheter ablation is one of the methods for treating arrhythmias. Under the monitoring of an X-ray angiography machine, the operation involves puncturing a blood vessel and inserting an electrode catheter into the heart. The abnormal structure causing the tachycardia is first checked and determined, and then a high-frequency current is released locally at that location to generate a very high temperature in a very small area. Through thermal efficiency, the moisture in the local tissue evaporates, causing dryness and necrosis, thus achieving the purpose of treatment.

[0003] Existing patent CN201410209079.9 is a catheter ablation device capable of forming continuous ablation lesions and its radiofrequency ablation catheter. The radiofrequency ablation catheter comprises a main body, an extension section and an annular section connected in sequence; and an annular electrode arranged on the annular section, the annular electrode having an ablation portion, and the ablation portion is continuously formed on the annular section. The radiofrequency ablation catheter of the present invention has a continuous annular electrode, which can significantly reduce the number of ablations to form a continuous annular ablation lesion.

[0004] However, when using an endoscopic pancreatic radiofrequency ablation catheter, it is necessary to use radiofrequency heating to achieve drying and necrosis of the lesion site. The existing heating is mostly performed directly through a heating block, and the end of the catheter directly wraps the heating block, which makes it difficult to accurately control the heating temperature and easily causes adhesion. The necrotic site needs to be completely heated, and the end of the catheter is thin and the contact area is small, making it difficult to operate it to dry at a circular angle. Summary of the invention

[0005] The purpose of the present invention is to provide an endoscopic pancreatic radiofrequency ablation catheter to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An endoscopic pancreatic radiofrequency ablation catheter comprises a catheter, one end of which is provided with a control handle, the catheter is provided with filling resin, the other end of which is provided with a heating assembly, the heating assembly comprising a heating block and a contact sleeve, the catheter is provided with a radiofrequency cable for heating the heating block, the catheter is provided with a detection rod for measuring the temperature of the heating block, the catheter is provided with an adjustment assembly for adjusting the bending angle of the heating assembly, the catheter is provided with an air guide tube, the outer side of the heating block is sleeved with a heat insulating layer, the upper end of the heating block is fixedly connected with a heat conductive ring, the upper end of the heat conductive ring is provided with a plurality of groups of mutually fitting heat transfer arc plates distributed in a circumferential array, the contact sleeve is wrapped around the outer sides of the plurality of groups of heat transfer arc plates, the inner cavity of the heat conductive ring is provided with a supporting air plate, the inner cavity of the supporting air plate is connected to the air guide tube, the upper end of the supporting air plate is provided with a plurality of groups of folding air tubes fixed on the arc-shaped inner wall of the heat transfer arc plate, the lower end of the folding air tube is connected to the inner cavity of the supporting air plate, and the control handle is provided with an air pump for controlling the airflow in the air guide tube.

[0008] Preferably, a middle tube is arranged in the middle of the hollow hemisphere composed of multiple groups of the heat transfer arc plates distributed in a circular array, a circular arc groove is arranged on the arc-shaped inner wall of the middle tube, an air bag is arranged in the inner cavity of the middle tube, the lower end of the air bag is connected to the supporting air plate, and the air bag is pressed on the arc groove.

[0009] Preferably, a folding ring is provided on the outer side of the airbag, the folding ring is connected to the inner cavity of the airbag, a pair of heat-conducting arc plates are symmetrically provided in the inner wall of the arc groove, adjacent pairs of the heat-conducting arc plates are connected by multiple groups of elastic bands, and the folding ring is pressed onto the arc-shaped inner wall of the heat-conducting arc plate.

[0010] Preferably, the middle section of the detection rod passes through the filling resin, and the other end of the detection rod is provided with a first detector and a second detector, the second detector is fixed in the inner cavity of the heating block, and the detection end of the first detector is fitted with the heat transfer arc plate and the heat conduction arc sheet.

[0011] Preferably, a spiral deformation ring is provided on the side of the heating component away from the contact sleeve, and a spacing groove is provided at the upper end of the filling resin. The spiral deformation ring is supported in the spacing groove of the filling resin, and a hose is provided in the middle of the spacing groove. The spiral deformation ring is sleeved on the outside of the hose, and the two ends of the upper line of the spiral deformation ring are fixedly pressed on the filling resin.

[0012] Preferably, the adjustment component includes a traction piece, a plurality of traction pieces distributed in a circular array are provided on the outer edge of the inner cavity of the catheter, the traction piece is fixed in the filling resin, two groups of elastic pull ropes are provided in the inner cavity of the traction piece, a base plate is provided between the catheter and the control handle, the traction piece extends to the outside of the base plate, a connecting rod connected to the control handle is provided on the base plate, a pressure ring is sleeved on the connecting rod, one end of the plurality of elastic pull ropes distributed in a circular array are fixed on the pressure ring, the other ends of the plurality of elastic pull ropes extend to the spacing groove, and ends of a pair of elastic pull ropes in the traction piece are respectively fixed on the spiral deformation ring and the hose.

[0013] Preferably, the inner diameter of the pressure ring is smaller than the outer diameter of the connecting rod, a spring is provided at the lower end of the pressure ring, the spring is sleeved on the outside of the connecting rod, the upper end of the spring is fixed to the lower end surface of the pressure ring, and the lower end of the spring is pressed onto the inner wall of the control handle.

[0014] Preferably, an adjusting swivel is rotatably mounted on the lower end of the base plate, a pressure ball is provided at the lower end of the adjusting swivel and is pressed onto the upper end of the pressure ring, an opening groove facing the adjusting swivel is provided on the outer wall of the control handle, the upper end of the adjusting swivel extends to the outside of the opening groove, and the height of the pressure ball is greater than the height difference between the pressure ring and the adjusting swivel.

[0015] Preferably, one end of the RF cable extends to the inner cavity of the heating block, the middle section of the RF cable is fixed in the filling resin, and one end of the RF cable, the detection rod and the air pump are electrically connected to the control handle, and a control panel is provided on the outside of the control handle.

[0016] Preferably, the contact sleeve is made of elastic film material, fixed at the end of the conduit, the inner side of the contact sleeve fits the arc-shaped outer wall of the heat transfer arc plate, the side walls of the heat transfer arc plate are all rounded, the insulation layer is screwed to the end of the filling resin, and the adjusting ring bearing is rotated and installed on the base plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adds an air pipe and a heat transfer arc plate to the existing conduit, uses the air pipe to achieve expansion, and then expands the heat transfer arc plates distributed in a circular array outward, thereby forming a gap at the contact layer position, thereby achieving intermittent heating during circumferential contact heating and drying. At the same time, the heating block is wrapped with a heat insulation layer to reduce the conduction temperature of the conduit, avoiding excessive heating caused by direct contact, and cooperates with the heat transfer of the heat conductive ring to achieve accurate and convenient control of the temperature, greatly reducing the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the catheter end of the present invention;

[0021] Figure 3 is a schematic cross-sectional view of a catheter of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the present invention;

[0023] Figure 5 for Figure 4 A magnified view of the structure at center;

[0024] Figure 6 for Figure 4 A magnified view of the structure at B in the middle;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the heat-conducting ring of the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the heat transfer arc plate of the present invention after expansion and deformation;

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the supporting gas plate and the detection rod of the present invention;

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the heat transfer arc plate of the present invention after expansion and wrapping the contact sleeve.

[0029] In the figure: 1. catheter; 2. control handle; 3. control panel; 4. adjustment swivel; 5. filling resin; 6. traction piece; 7. detection rod; 8. radio frequency cable; 9. air guide tube; 10. elastic pull rope; 11. contact sleeve; 12. spring; 13. spiral deformation ring; 14. support air plate; 15. folding air tube; 16. heating block; 17. insulation layer; 18. pressure ring; 19. bottom plate; 20. pressure ball; 21. first detector; 22. air bag; 23. arc groove; 24. heat conductive arc sheet; 25. elastic band; 26. folding ring; 27. heat transfer arc plate; 28. heat conductive ring; 29. ​​middle tube; 30. second detector; 31. hose. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 9 , the present invention provides a technical solution:

[0032] Embodiment 1: An endoscopic pancreatic radiofrequency ablation catheter comprises a catheter 1, a control handle 2 is provided at one end of the catheter 1, a filling resin 5 is provided at the catheter 1, a heating assembly is provided at the other end of the catheter 1, the heating assembly comprises a heating block 16 and a contact sleeve 11, a radiofrequency cable 8 for heating the heating block 16 is provided in the catheter 1, a detection rod 7 for measuring the temperature of the heating block 16 is provided in the catheter 1, and an adjustment assembly for adjusting the bending angle of the heating assembly is provided in the catheter 1.

[0033] The filling resin 5 is provided to realize the stable installation of the internal structure of the catheter 1, the radio frequency cable 8 is used to heat the heating block 16, and the detection rod 7 is used to detect the temperature and other data, so as to achieve remote control of the end of the catheter 1.

[0034] An air duct 9 is provided in the conduit 1, an insulating layer 17 is sleeved on the outer side of the heating block 16, a heat-conducting ring 28 is fixedly connected to the upper end of the heating block 16, a plurality of groups of mutually fitting heat transfer arc plates 27 distributed in a circular array are provided on the upper end of the heat-conducting ring 28, and the contact sleeve 11 is wrapped around the outer sides of the plurality of groups of heat transfer arc plates 27.

[0035] The heat insulating layer 17 is used to wrap the heating block 16 to prevent heat diffusion, thereby reducing the temperature dissipated by the catheter 1 in the blood vessel and avoiding affecting the blood vessel. The contact sleeve 11 is used to wrap the pancreas and other tissues to provide contact protection and reduce wear. At the same time, a heat conduction barrier is provided to reduce the speed of temperature conduction, thereby facilitating control.

[0036] A supporting air plate 14 is arranged in the inner cavity of the heat conducting ring 28, the inner cavity of the supporting air plate 14 is connected to the air guide tube 9, a plurality of groups of folding air tubes 15 fixed on the arc-shaped inner wall of the heat transfer arc plate 27 are arranged at the upper end of the supporting air plate 14, the lower end of the folding air tube 15 is connected to the inner cavity of the supporting air plate 14, and an air pump for controlling the airflow in the air guide tube 9 is arranged in the control handle 2.

[0037] By arranging the air pump, the folded air pipe 15 and the supporting air plate 14, air intake expansion is formed, so that the heat transfer arc plates 27 distributed in the circumferential array are deformed and expanded outward, and gaps appear between adjacent heat transfer arc plates 27, so that the contact layer 11 is deformed synchronously during the expansion and deformation, and gaps are formed between adjacent heat transfer arc plates 27 on the contact layer 11. When used in the heating operation, the purpose of interval heating is achieved to avoid continuous high-temperature drying.

[0038] Working principle: First, the radio frequency cable 8 is used to heat the heating block 16, and the detection rod 7 is used to detect the temperature and other data, so as to achieve remote control of the end of the catheter 1, and the heat is transferred to the heat transfer arc plate 27 by the heat conductive ring 28, which drives the contact layer 11 to heat up simultaneously. When performing circular angle drying, the folded air tube 15 is expanded by the cooperation of the air pump and the air guide tube 9, driving the multiple groups of heat transfer arc plates 27 distributed in the circular array to expand and deform outward. Due to the expansion and deformation, not only the outer diameter of the contact layer 11 is increased, the contact area is expanded, but also interval heating is formed, which is convenient for temperature control and adjustment.

[0039] Embodiment 2: On the basis of Embodiment 1, in order to further drive and support the expansion of the heat transfer arc plate 27, a middle tube 29 is arranged in the middle of the hollow hemisphere composed of multiple groups of heat transfer arc plates 27 distributed in a circular array, and a circular arc groove 23 is arranged on the arc-shaped inner wall of the middle tube 29. An airbag 22 is arranged in the inner cavity of the middle tube 29, and the lower end of the airbag 22 is connected to the supporting air plate 14. The airbag 22 is pressed on the arc groove 23. A folding ring 26 is arranged on the outer side of the airbag 22. The folding ring 26 is connected to the inner cavity of the airbag 22. A pair of heat-conducting arc sheets 24 are symmetrically arranged in the inner wall of the arc groove 23. The adjacent pair of heat-conducting arc sheets 24 are connected by multiple groups of elastic bands 25, and the folding ring 26 is pressed on the arc-shaped inner wall of the heat-conducting arc sheet 24.

[0040] By utilizing the air intake expansion of the airbag 22 and the folding ring 26, the middle 29 is driven to deform and increase its inner diameter, so that the multiple groups of heat transfer arc plates 27 are relatively separated, ensuring the directional deformation of the heat transfer arc plates 27. At the same time, by providing an elastic band 25, after pressure relief, the heat transfer arc plates 27 are stably reset under the action of the elastic band 25 and their own elastic force, which facilitates the removal of the catheter 1.

[0041] Example 3: On the basis of Example 2, the middle section of the detection rod 7 passes through the filling resin 5, and the other end of the detection rod 7 is provided with a first detector 21 and a second detector 30, the second detector 30 is fixed in the inner cavity of the heating block 16, the detection end of the first detector 21 is in contact with the heat transfer arc plate 27 and the heat conductive arc plate 24, one end of the RF cable 8 extends to the inner cavity of the heating block 16, the middle section of the RF cable 8 is fixed in the filling resin 5, the RF cable 8, the detection rod 7 and one end of the air pump are electrically connected to the control handle 2, a control panel 3 is provided on the outside of the control handle 2, the contact sleeve 11 is made of an elastic film material, the contact sleeve 11 is fixed to the end of the catheter 1, the inner side of the contact sleeve 11 is in contact with the arc-shaped outer wall of the heat transfer arc plate 27, the side walls of the heat transfer arc plate 27 are all rounded, and the heat insulation layer 17 is fixed to the end of the filling resin 5 by screws.

[0042] The temperature of the heating block 16 is monitored by providing the second detector 30 , and the temperature of the heat transfer arc plate 27 is monitored by utilizing the first detector 21 , so as to ensure that the internal temperature thereof is stable within a reasonable range.

[0043] Example 4: On the basis of Example 3, in order to facilitate the control of the end of the catheter 1, so as to achieve dry contact at a circular angle in the small inner cavity of the blood vessel, a spiral deformation ring 13 is provided on the side of the heating component away from the contact sleeve 11, and a spacing groove is provided at the upper end of the filling resin 5. The spiral deformation ring 13 is supported in the spacing groove of the filling resin 5, and a hose 31 is provided in the middle of the spacing groove. The spiral deformation ring 13 is sleeved on the outside of the hose 31, and the upper ends of the spiral deformation ring 13 are fixedly pressed on the filling resin 5.

[0044] By providing the spiral deformation ring 13 and the hose 31 , a bendable section is formed at the end of the catheter 1 , which facilitates the bending adjustment of the catheter 1 .

[0045] The adjustment component includes a traction member 6. The outer edge of the inner cavity of the catheter 1 is provided with multiple groups of traction members 6 distributed in a circular array. The traction member 6 is fixed in the filling resin 5. Two groups of elastic pull ropes 10 are arranged in the inner cavity of the traction member 6. A base plate 19 is arranged between the catheter 1 and the control handle 2. The traction member 6 extends to the outside of the base plate 19. A connecting rod connected to the control handle 2 is arranged on the base plate 19. A pressure ring 18 is sleeved on the connecting rod. One end of the multiple groups of elastic pull ropes 10 distributed in a circular array is fixed on the pressure ring 18, and the other end of the multiple groups of elastic pull ropes 10 extends to the spacing groove. The ends of a pair of elastic pull ropes 10 in the traction member 6 are respectively fixed on the spiral deformation ring 13 and the hose 31.

[0046] The spiral deformation ring 13 and the hose 31 are pulled by the elastic pull rope 10, and the pulling parts 6 distributed in a circumferential array are matched to form a traction drive with a circumferential angle.

[0047] The inner diameter of the pressure ring 18 is smaller than the outer diameter of the connecting rod. A spring 12 is provided at the lower end of the pressure ring 18. The spring 12 is sleeved on the outer side of the connecting rod. The upper end of the spring 12 is fixed to the lower end surface of the pressure ring 18. The lower end of the spring 12 is pressed onto the inner wall of the control handle 2. An adjusting swivel 4 is rotatably installed at the lower end of the base plate 19. A pressure ball 20 pressed onto the upper end of the pressure ring 18 is provided at the lower end of the adjusting swivel 4. An open groove facing the adjusting swivel 4 is provided on the outer wall of the control handle 2. The upper end of the adjusting swivel 4 extends to the outside of the open groove. The height of the pressure ball 20 is greater than the height difference between the pressure ring 18 and the adjusting swivel 4. The bearing of the adjusting swivel 4 is rotated and installed on the base plate 19.

[0048] The spring 12 is used to support the pressure ring 18 to ensure that the catheter 1 remains vertical. When rotation adjustment is required, the pressure ball 20 is pressed against the upper end of the pressure ring 18 by rotating the adjusting ring 4. Under the squeezing of the pressure ball 20, one side of the spring 12 is compressed and deformed, and the pressure ring 18 drops accordingly, synchronously pulling the elastic pull rope 10 at this position. As the pressure ball 20 rotates circumferentially, multiple groups of elastic pull ropes 10 distributed circumferentially are pulled, thereby completing the circumferential angle bending drive of the end of the catheter 1.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An endoscopic pancreatic radiofrequency ablation catheter, comprising a catheter (1), wherein one end of the catheter (1) is provided with a control handle (2), the catheter (1) is provided with a filling resin (5), and the other end of the catheter (1) is provided with a heating component, the heating component comprising a heating block (16) and a contact sleeve (11), characterized in that: The catheter (1) is provided with a radio frequency cable (8) for heating the heating block (16), the catheter (1) is provided with a detection rod (7) for measuring the temperature of the heating block (16), the catheter (1) is provided with an adjustment component for adjusting the bending angle of the heating component, the catheter (1) is provided with an air guide tube (9), the outer side of the heating block (16) is sleeved with a heat insulating layer (17), the upper end of the heating block (16) is fixedly connected with a heat conducting ring (28), and the upper end of the heat conducting ring (28) is provided with a plurality of groups of mutually fitting heat conducting rings distributed in a circumferential array. A heat transfer arc plate (27), a contact sleeve (11) wrapped around the outer side of the plurality of heat transfer arc plates (27), a support air plate (14) being arranged in the inner cavity of the heat transfer ring (28), the inner cavity of the support air plate (14) being connected to the air guide tube (9), the upper end of the support air plate (14) being arranged with a plurality of folded air tubes (15) fixed on the arc-shaped inner wall of the heat transfer arc plate (27), the lower end of the folded air tube (15) being connected to the inner cavity of the support air plate (14), and an air pump for controlling the air flow in the air guide tube (9) being arranged in the control handle (2).

2. The endoscopic pancreatic radiofrequency ablation catheter according to claim 1, characterized in that: A middle tube (29) is arranged in the middle of a hollow hemisphere composed of a plurality of groups of heat transfer arc plates (27) distributed in a circumferential array. A circular arc groove (23) is arranged on the arc-shaped inner wall of the middle tube (29). An air bag (22) is arranged in the inner cavity of the middle tube (29). The lower end of the air bag (22) is connected to the supporting air plate (14), and the air bag (22) is pressed onto the arc groove (23).

3. The endoscopic pancreatic radiofrequency ablation catheter according to claim 2, characterized in that: A folding ring (26) is arranged on the outside of the airbag (22), the folding ring (26) being connected to the inner cavity of the airbag (22), a pair of heat-conducting arc sheets (24) are symmetrically arranged in the inner wall of the arc groove (23), adjacent pairs of the heat-conducting arc sheets (24) are connected by a plurality of sets of elastic bands (25), and the folding ring (26) is pressed onto the arc-shaped inner wall of the heat-conducting arc sheet (24).

4. The endoscopic pancreatic radiofrequency ablation catheter according to claim 3, characterized in that: The middle section of the detection rod (7) passes through the filling resin (5), and the other end of the detection rod (7) is provided with a first detector (21) and a second detector (30), the second detector (30) is fixed in the inner cavity of the heating block (16), and the detection end of the first detector (21) is in contact with the heat transfer arc plate (27) and the heat conduction arc sheet (24).

5. The endoscopic pancreatic radiofrequency ablation catheter according to claim 2, characterized in that: A spiral deformation ring (13) is arranged on the side of the heating component away from the contact sleeve (11), a spacing groove is arranged at the upper end of the filling resin (5), the spiral deformation ring (13) is supported in the spacing groove of the filling resin (5), a hose (31) is arranged in the middle of the spacing groove, the spiral deformation ring (13) is sleeved on the outside of the hose (31), and the upper ends of the spiral deformation ring (13) are fixedly pressed onto the filling resin (5).

6. The endoscopic pancreatic radiofrequency ablation catheter according to claim 5, characterized in that: The adjustment assembly comprises a traction member (6), a plurality of traction members (6) distributed in a circumferential array are arranged on the outer edge of the inner cavity of the catheter (1), the traction member (6) is fixed in the filling resin (5), two groups of elastic pull ropes (10) are arranged in the inner cavity of the traction member (6), a base plate (19) is arranged between the catheter (1) and the control handle (2), the traction member (6) extends to the outer side of the base plate (19), a connecting rod connected to the control handle (2) is arranged on the base plate (19), a pressure ring (18) is sleeved on the connecting rod, one end of the plurality of elastic pull ropes (10) distributed in a circumferential array is fixed on the pressure ring (18), and the other end of the plurality of elastic pull ropes (10) extends to the spacing groove, and the ends of a pair of elastic pull ropes (10) in the traction member (6) are respectively fixed on the spiral deformation ring (13) and the hose (31).

7. The endoscopic pancreatic radiofrequency ablation catheter according to claim 6, characterized in that: The inner diameter of the pressing ring (18) is smaller than the outer diameter of the connecting rod. A spring (12) is provided at the lower end of the pressing ring (18). The spring (12) is sleeved on the outer side of the connecting rod. The upper end of the spring (12) is fixed to the lower end surface of the pressing ring (18). The lower end of the spring (12) is pressed onto the inner wall of the control handle (2).

8. The endoscopic pancreatic radiofrequency ablation catheter according to claim 7, characterized in that: An adjusting swivel (4) is rotatably mounted on the lower end of the bottom plate (19); a pressure ball (20) is provided at the lower end of the adjusting swivel (4) and is pressed onto the upper end of the pressure ring (18); an opening groove facing the adjusting swivel (4) is provided on the outer wall of the control handle (2); the upper end of the adjusting swivel (4) extends to the outside of the opening groove; and the height of the pressure ball (20) is greater than the height difference between the pressure ring (18) and the adjusting swivel (4).

9. The endoscopic pancreatic radiofrequency ablation catheter according to claim 1, characterized in that: One end of the radio frequency cable (8) extends to the inner cavity of the heating block (16), the middle section of the radio frequency cable (8) is fixed in the filling resin (5), and one end of the radio frequency cable (8), the detection rod (7) and the air pump are all electrically connected to the control handle (2), and a control panel (3) is arranged on the outer side of the control handle (2).

10. The endoscopic pancreatic radiofrequency ablation catheter according to claim 9, characterized in that: The contact sleeve (11) is made of an elastic film material. The contact sleeve (11) is fixed to the end of the conduit (1). The inner side of the contact sleeve (11) fits the arc-shaped outer wall of the heat transfer arc plate (27). The side walls of the heat transfer arc plate (27) are all rounded. The heat insulation layer (17) is screwed to the end of the filling resin (5). The bearing of the adjusting ring (4) is rotated and installed on the bottom plate (19).

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