Radiofrequency ablation system and radiofrequency ablation forceps for renal sympathetic denervation

Abstract

The application relates to a radiofrequency ablation system and a radiofrequency ablation clamp for renal sympathetic denervation, which comprises an upper jaw and a lower jaw that can be opened and closed relative to each other, the upper jaw is provided with upper jaw radiofrequency electrodes, the lower jaw is provided with lower jaw radiofrequency electrodes, the lower jaw comprises a lower jaw main body in an arc structure with an axis extending along a left-right direction, a lower electrode seat made of insulating material corresponding to each lower jaw radiofrequency electrode is movably arranged on the lower jaw main body in a circumferential direction, each lower jaw radiofrequency electrode is fixed on the corresponding lower electrode seat, the upper jaw radiofrequency electrodes are at least three, each upper jaw radiofrequency electrode is arranged in a left-right direction at intervals, the lower jaw radiofrequency electrodes are at least three, each lower jaw radiofrequency electrode is arranged in a left-right direction at intervals, and the radiofrequency ablation clamp further comprises an electrode seat driving mechanism for driving the circumferential movement of the corresponding upper electrode seat and lower electrode seat. The purpose of the application is to provide a radiofrequency ablation system capable of retaining part of parasympathetic nerves and a radiofrequency ablation clamp used in the radiofrequency ablation system.

Description

Technical Field

[0001] This invention relates to medical devices for the treatment of hypertension, and more particularly to a radiofrequency ablation system and radiofrequency ablation forceps for renal artery sympathectomy. Background Technology

[0002] Hypertension is a common disease. The pathological and physiological mechanisms of hypertension are quite complex, but the neuroendocrine system is an important mechanism for maintaining blood pressure balance. Excessive excitation of the sympathetic nervous system is considered a fundamental link in the pathogenesis of hypertension.

[0003] Using laparoscopic technology, radiofrequency ablation forceps are used to ablate the renal artery adventitia and renal sympathetic nerves, thereby blocking the transmission of nerve signals between the central sympathetic nervous system and the kidneys and adrenal glands. Existing radiofrequency ablation forceps, such as the "Radiofrequency Ablation Device" disclosed in Chinese Patent CN103393465B, include an ablation head, a cannula assembly, and a control mechanism. The ablation head is used to clamp tissue and perform radiofrequency ablation. The control mechanism controls the opening and closing of the ablation head. The cannula assembly connects the ablation head and the control mechanism. The ablation head includes an upper jaw, a lower jaw, and a temperature sensor. An upper electrode seat is provided on the upper jaw, and a lower electrode seat is provided on the lower jaw. The upper and lower jaws are rotatably connected by a pin. The cannula assembly includes an outer cannula and a pull rod located inside the outer cannula. The proximal end of the lower jaw is inserted into the outer cannula and welded to it. The distal end of the pull rod is hinged to the upper jaw. The control mechanism includes a handle and a lever that can be gripped and operated. The lever is connected to the tube and can drive the tube to move axially, thereby realizing the opening and closing function of the ablation head.

[0004] During use, with the assistance of a laparoscope, the ablation head is inserted to the edge of the renal artery through the channel established by the trocar. Pulling the lever causes the upper jaw to flip relative to the lower jaw and clamp the outer wall of the renal artery. Radiofrequency ablation is then performed on the renal artery epithelium through the radiofrequency electrode on the electrode holder.

[0005] The problem with existing radiofrequency ablation clamps is that the sympathetic and parasympathetic nervous systems coexist. The ablation of the renal artery lining by the radiofrequency electrode is indiscriminate ablation, meaning that both the sympathetic and parasympathetic nerves on the renal artery lining will be killed indiscriminately. However, the real cause of hypertension is the transmission of the sympathetic nervous system, while the transmission of the parasympathetic nervous system has no effect on hypertension. This indiscriminate killing of the sympathetic and parasympathetic nerves may lead to some unnecessary complications or cause some loss of function in the patient. Summary of the Invention

[0006] The purpose of this invention is to provide a radiofrequency ablation system that can preserve part of the parasympathetic nerves during renal artery sympathectomy; the purpose of this invention is also to provide a radiofrequency ablation clamp used in the radiofrequency ablation system.

[0007] To solve the above-mentioned technical problems, the technical solution of the radiofrequency ablation system in this invention is as follows:

[0008] A radiofrequency ablation system for renal artery sympathectomy includes a radiofrequency ablation clamp. The clamp includes a relatively openable upper jaw and a lower jaw. An upper jaw radiofrequency electrode is disposed on the upper jaw, and a lower jaw radiofrequency electrode is disposed on the lower jaw. The system also includes a blood pressure measuring device and a power adjustment device electrically connected to the upper and lower jaw radiofrequency electrodes. There are at least three upper jaw radiofrequency electrodes, spaced apart in a left-right direction. There are also at least three lower jaw radiofrequency electrodes, spaced apart in a left-right direction. The upper jaw includes an arcuate structure with its axis extending in a left-right direction. The upper jaw body includes an upper electrode holder made of insulating material that is circumferentially guided and mounted on the upper jaw body, corresponding to each upper jaw radio frequency electrode. Each upper jaw radio frequency electrode is fixed on its corresponding upper electrode holder. The lower jaw includes an arc-shaped lower jaw body with its axis extending in the left-right direction. A lower electrode holder made of insulating material that is circumferentially guided and mounted on the lower jaw body, corresponding to each lower jaw radio frequency electrode, is fixed on its corresponding lower electrode holder. The radio frequency ablation forceps also includes an electrode holder driving mechanism for driving the corresponding upper and lower electrode holders to move circumferentially.

[0009] Furthermore, the power adjustment device is used to output test power and ablation power to the upper jaw radio frequency electrode and the lower jaw radio frequency electrode, with the test power being 1~2W and the ablation power being 8~9W.

[0010] Furthermore, the electrode holder driving mechanism includes an upper electrode holder driving mechanism that corresponds one-to-one with each upper electrode holder and a lower electrode holder driving mechanism that corresponds one-to-one with each lower electrode holder.

[0011] Furthermore, the upper electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The upper jaw radio frequency electrode is fixed to the lower end of the upper electrode holder. The upper end of the upper electrode holder is provided with upper electrode holder transmission teeth. The upper jaw body is rotatably equipped with upper transmission gears that correspond one-to-one with the upper electrode holder. The axis of the upper transmission gear extends in the left-right direction. The upper transmission gear meshes with the upper electrode holder transmission teeth for transmission. The upper transmission gear has a left axle and a right axle fixed coaxially on it. The left axle of the upper transmission gear has a left transmission rope wound around it, and the right axle of the upper transmission gear has a right transmission rope wound around it. The winding directions of the left and right transmission ropes of the upper transmission gear are opposite. The upper electrode holder drive mechanism includes a first motor for driving the upper transmission gear to rotate forward via the left transmission rope, which is connected to the left transmission rope of the upper transmission gear. The upper electrode holder drive mechanism also includes a second motor for driving the upper transmission gear to rotate in the opposite direction via the right transmission rope, which is connected to the right transmission rope of the upper transmission gear.

[0012] Furthermore, the lower electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The lower jaw radio frequency electrode is fixed to the upper end of the lower electrode holder, and the lower end of the lower electrode holder is provided with a lower electrode holder drive tooth. The lower jaw body is rotatably equipped with a lower drive gear that corresponds to the lower electrode holder. The axis of the lower drive gear extends in the left-right direction, and the lower drive gear meshes with the lower electrode holder drive tooth for transmission. The lower drive gear has a left axle and a right axle fixed coaxially on it. The left axle of the lower drive gear has a left drive rope wound on it, and the right axle of the lower drive gear has a right drive rope wound on it. The winding directions of the left and right drive ropes are opposite. The lower electrode holder drive mechanism includes a first motor for driving the lower drive gear to rotate forward via the left drive rope, which is connected to the left drive rope. The lower electrode holder drive mechanism also includes a second motor for driving the lower drive gear to rotate in the opposite direction via the right drive rope, which is connected to the right drive rope.

[0013] The technical solution of the radiofrequency ablation clamp in this invention is as follows:

[0014] The radiofrequency ablation forceps includes an upper jaw and a lower jaw that can be opened and closed relative to each other. An upper jaw radiofrequency electrode is disposed on the upper jaw, and a lower jaw radiofrequency electrode is disposed on the lower jaw. There are at least three upper jaw radiofrequency electrodes, spaced apart in a left-right direction. There are also at least three lower jaw radiofrequency electrodes, spaced apart in a left-right direction. The upper jaw includes an arc-shaped upper jaw body with its axis extending in a left-right direction. An upper electrode holder made of insulating material is circumferentially guided and mounted on the upper jaw body, corresponding to each upper jaw radiofrequency electrode. Each upper jaw radiofrequency electrode is fixed to its corresponding upper electrode holder. The lower jaw includes an arc-shaped lower jaw body with its axis extending in a left-right direction. A lower electrode holder made of insulating material is circumferentially guided and mounted on the lower jaw body, corresponding to each lower jaw radiofrequency electrode. Each lower jaw radiofrequency electrode is fixed to its corresponding lower electrode holder. The radiofrequency ablation forceps also includes an electrode holder driving mechanism for driving the corresponding upper and lower electrode holders to move circumferentially.

[0015] Furthermore, the electrode holder driving mechanism includes an upper electrode holder driving mechanism that corresponds one-to-one with each upper electrode holder and a lower electrode holder driving mechanism that corresponds one-to-one with each lower electrode holder.

[0016] Furthermore, the upper electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The upper jaw radio frequency electrode is fixed to the lower end of the upper electrode holder. The upper end of the upper electrode holder is provided with upper electrode holder transmission teeth. The upper jaw body is rotatably equipped with upper transmission gears that correspond one-to-one with the upper electrode holder. The axis of the upper transmission gear extends in the left-right direction. The upper transmission gear meshes with the upper electrode holder transmission teeth for transmission. The upper transmission gear has a left axle and a right axle fixed coaxially on it. The left axle of the upper transmission gear has a left transmission rope wound around it, and the right axle of the upper transmission gear has a right transmission rope wound around it. The winding directions of the left and right transmission ropes of the upper transmission gear are opposite. The upper electrode holder drive mechanism includes a first motor for driving the upper transmission gear to rotate forward via the left transmission rope, which is connected to the left transmission rope of the upper transmission gear. The upper electrode holder drive mechanism also includes a second motor for driving the upper transmission gear to rotate in the opposite direction via the right transmission rope, which is connected to the right transmission rope of the upper transmission gear.

[0017] Furthermore, the lower electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The lower jaw radio frequency electrode is fixed to the upper end of the lower electrode holder, and the lower end of the lower electrode holder is provided with a lower electrode holder drive tooth. The lower jaw body is rotatably equipped with a lower drive gear that corresponds to the lower electrode holder. The axis of the lower drive gear extends in the left-right direction, and the lower drive gear meshes with the lower electrode holder drive tooth for transmission. The lower drive gear has a left axle and a right axle fixed coaxially on it. The left axle of the lower drive gear has a left drive rope wound on it, and the right axle of the lower drive gear has a right drive rope wound on it. The winding directions of the left and right drive ropes are opposite. The lower electrode holder drive mechanism includes a first motor for driving the lower drive gear to rotate forward via the left drive rope, which is connected to the left drive rope. The lower electrode holder drive mechanism also includes a second motor for driving the lower drive gear to rotate in the opposite direction via the right drive rope, which is connected to the right drive rope.

[0018] The beneficial effects of this invention are as follows: Since the sympathetic and parasympathetic nerves are distributed along the renal artery axis, at least three maxillary radiofrequency electrodes and at least three mandibular radiofrequency electrodes distributed along the renal artery axis are provided. The distribution of the maxillary and mandibular radiofrequency electrodes is consistent with the direction of the sympathetic and parasympathetic nerves, which facilitates testing and ablation. In use, the maxillary and mandibular jaws clamp the renal artery, and the power adjustment device adjusts the maxillary and mandibular radiofrequency electrodes to the test power. The maxillary and mandibular radiofrequency electrodes are applied to the renal artery epithelium. Low-power stimulation is applied. If the corresponding locations of the upper and lower jaw radiofrequency electrodes are sympathetic nerves or predominantly sympathetic nerves, the patient's blood pressure changes significantly, and the next ablation operation can be performed. If the corresponding locations of the upper and lower jaw radiofrequency electrodes are parasympathetic nerves or predominantly parasympathetic nerves, the patient's blood pressure changes are not significant, and ablation is not performed at this location. The circumferential position of the upper and lower jaw radiofrequency electrodes is changed, and the next location is tested. In this way, testing and ablation of all locations in the circumferential direction of the renal artery are completed, which can preserve some parasympathetic nerves to a certain extent. Attached Figure Description

[0019] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the radiofrequency ablation clamp in one embodiment of the radiofrequency ablation system of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle and upper jaw;

[0022] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle and lower jaw;

[0023] Figure 4 yes Figure 2 A bottom view;

[0024] Figure 5 This is a schematic diagram showing the fit between each upper transmission gear and its corresponding upper electrode holder;

[0025] Figure 6 This is a schematic diagram of the engagement between a single upper transmission gear and the corresponding upper electrode seat in this invention;

[0026] Figure 7 This is a schematic diagram of the first distribution of the radio frequency electrodes on each jaw.

[0027] Figure 8 This is a schematic diagram of the second distribution of the radio frequency electrodes on each jaw.

[0028] Figure 9 This is a schematic diagram of the third distribution of the radio frequency electrodes on each jaw.

[0029] Explanation of reference numerals in the attached diagram: 1. Outer tube; 2. Left transmission rope of the upper transmission gear; 3. Right transmission rope of the upper transmission gear; 4. Left transmission rope of the lower transmission gear; 5. Right transmission rope of the lower transmission gear; 6. Pull rod; 7. Upper jaw; 8. Lower jaw; 9. Upper electrode holder; 10. Upper jaw radiofrequency electrode; 11. Lower jaw radiofrequency electrode; 12. Lower electrode holder; 13. Upper jaw body; 14. Hinge hole; 15. Upper transmission gear; 16. Left axle of the upper transmission gear; 17. Hinge shaft; 18. Lower transmission gear; 19. Lower jaw body; 20. Arc-shaped track; 21. Right axle of the upper transmission gear; 22. Transmission gear of the upper electrode holder; 23. Smooth plate segment; 24. Renal artery. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0031] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0032] Examples of implementations of the radiofrequency ablation system for renal artery sympathectomy in this invention include: Figures 1-9 As shown: It includes a blood pressure measuring device (not shown in the figure), a power adjustment device (not shown in the figure), and a radiofrequency ablation clamp. The blood pressure measuring device is used to monitor the patient's blood pressure, and the power adjustment device is used to adjust the output power of the radiofrequency ablation clamp. In this embodiment, the power adjustment device changes the output power of the radiofrequency ablation clamp by changing the current.

[0033] The radiofrequency ablation forceps includes an upper jaw 7 and a lower jaw 8 that can open and close relative to each other. A right upper jaw radiofrequency electrode 10 is mounted on the upper jaw 7, and a lower jaw radiofrequency electrode 11 is mounted on the lower jaw 8. The forceps also includes an outer sleeve 1 and a fixed handle and a movable handle located at the tail end of the outer sleeve. The movable handle is hinged to the outer sleeve 1, and a pull rod 6 is hinged to the movable handle. The front end of the pull rod 6 is hinged to the upper jaw. The lower jaw 8 is fixed to the outer sleeve 1, and a hinge shaft 17 extending in a left-right direction is fixed to one side of the lower jaw. A hinge hole 14 that mates with the hinge shaft is provided on the upper jaw. The pull rod 6 can move back and forth under the action of the movable handle. When the pull rod moves forward, the upper jaw can open relative to the lower jaw; when the pull rod moves backward, the upper jaw can close relative to the lower jaw. The structure of controlling the opening and closing of the upper and lower jaws via a pull rod is existing technology.

[0034] In this embodiment, there are four upper jaw radio frequency electrodes 10, which are arranged at intervals along the left and right directions, and four lower jaw radio frequency electrodes 11, which are arranged at intervals along the left and right directions.

[0035] The upper jaw includes an arc-shaped upper jaw body 13 with its axis extending in the left-right direction. Upper electrode holders 9, made of insulating material, are circumferentially guided and mounted on the upper jaw body 13, corresponding to each upper jaw radio frequency electrode. Since there are four upper jaw radio frequency electrodes 10, there are also four upper electrode holders 9, arranged sequentially in the left-right direction. The upper jaw body is provided with four arc-shaped tracks 20 extending circumferentially, and each upper electrode holder 9 is distributed and guided to move and be mounted on its corresponding arc-shaped track 20. Each upper jaw radio frequency electrode 10 is fixed to its corresponding upper electrode holder 9.

[0036] Similar to the upper jaw, the lower jaw 8 includes a lower jaw body 19 with an arcuate structure extending along the left-right direction. Lower electrode holders 12, made of insulating material, are movably mounted on the lower jaw body 19, corresponding to each lower jaw radiofrequency electrode. Each lower jaw radiofrequency electrode 11 is fixed to its corresponding lower electrode holder 12. The radiofrequency ablation clamp also includes an electrode holder driving mechanism for driving the corresponding upper and lower electrode holders to move circumferentially.

[0037] In this embodiment, the power adjustment device is used to output test power and ablation power to the upper jaw radio frequency electrode and the lower jaw radio frequency electrode, wherein the test power is 1~2W and the ablation power is 8~9W.

[0038] The electrode holder driving mechanism includes an upper electrode holder driving mechanism that corresponds to each upper electrode holder 9 and a lower electrode holder driving mechanism that corresponds to each lower electrode holder 12.

[0039] The upper electrode holder 9 is an arc-shaped plate structure with its axis extending in the left and right direction. The upper jaw radio frequency electrode 10 is fixed to the lower end of the upper electrode holder. The upper end of the upper electrode holder is provided with an upper electrode holder drive tooth 22. On the left and right sides of the upper electrode holder drive tooth, there are light plate segments 23 that cooperate with the arc-shaped track 20 for guiding movement. The upper palate body is rotatably equipped with upper transmission gears 15, which are corresponding to the upper electrode seats. The axis of the upper transmission gears 15 extends in the left-right direction. The upper transmission gears 15 mesh with the transmission teeth 22 of the upper electrode seats. The upper transmission gears are coaxially fixed with the left axle 16 and the right axle 21. The left axle 16 is wound with the left transmission rope 2, and the right axle 21 is wound with the right transmission rope 3. The winding directions of the left and right transmission ropes are opposite. The upper electrode seat drive mechanism includes a first motor for driving the upper transmission gear to rotate forward via the left transmission rope, which is connected to the left transmission rope. The upper electrode seat drive mechanism also includes a second motor for driving the upper transmission gear to rotate in the opposite direction via the right transmission rope, which is connected to the right transmission rope. The first and second motors are not shown in the accompanying drawings of this invention. They are mounted on a motor bracket outside the patient's body.

[0040] The lower electrode holder 9 is an arc-shaped plate structure with its axis extending in the left-right direction. The lower jaw radio frequency electrode 11 is fixed to the upper end of the lower electrode holder 12. The lower end of the lower electrode holder 12 is provided with a lower electrode holder transmission tooth. The lower jaw body is rotatably mounted with a lower transmission gear 18 that corresponds to the lower electrode holder. The axis of the lower transmission gear extends in the left-right direction. The lower transmission gear meshes with the lower electrode holder transmission tooth. The lower transmission gear has a left axle and a right axle fixed coaxially on it. The left axle of the lower transmission gear is wound with a left transmission rope, and the right axle of the lower transmission gear is wound with a right transmission rope. The winding directions of the left and right transmission ropes are opposite. The lower electrode holder drive mechanism includes a first motor for driving the lower transmission gear to rotate forward via the left transmission rope, which is connected to the left transmission rope. The lower electrode holder drive mechanism also includes a second motor for driving the lower transmission gear to rotate in the opposite direction via the right transmission rope, which is connected to the right transmission rope. The first motor and the second motor of the lower transmission gear are not shown in the accompanying drawings of this invention, and they are mounted on the motor bracket.

[0041] In other words, in this embodiment, each transmission gear corresponds to two motors, with four upper transmission gears and four lower transmission gears, for a total of sixteen motors.

[0042] The use of this invention will be briefly introduced using the upper jaw radiofrequency electrodes as an example. The positions of each upper jaw radiofrequency electrode will be adjusted, such as... Figure 7 As shown, the upper and lower jaws are then used to clamp the renal artery 24. The power adjustment device adjusts the output power of the upper jaw radiofrequency electrode to 1W. At this output power, it will not damage the renal artery skin, but only stimulate the sympathetic nerves on the renal artery 24. If the segment of the renal artery skin corresponding to the upper jaw radiofrequency electrode has more sympathetic nerves, the patient's blood pressure will change significantly, with both systolic and diastolic blood pressure changes ≥10mmHg. If the segment of the renal artery skin corresponding to the upper jaw radiofrequency electrode has fewer sympathetic nerves and more parasympathetic nerves, the patient's systolic and diastolic blood pressure changes will be less than 10mmHg. When there are more sympathetic nerves, the power adjustment device adjusts the output power of the upper jaw radiofrequency electrode to 8W, allowing direct radiofrequency ablation of this segment of the renal artery skin in the circumferential direction. When there are more parasympathetic nerves, it is necessary to release the upper and lower jaws and change the circumferential position of the upper jaw radiofrequency electrode, such as... Figure 8 As shown, let's test again to see whether the main nervous system present in this area is the sympathetic or parasympathetic nervous system.

[0043] The reason why each electrode holder in this invention corresponds to an electrode holder drive mechanism is so that each electrode holder can move independently circumferentially with its corresponding radio frequency electrode. This is because the distribution of sympathetic and parasympathetic nerves in the renal artery epithelium is not necessarily linear; it may also be irregularly distributed along oblique lines. Therefore, when testing the sympathetic and parasympathetic nerves, more arrangements of the maxillary and mandibular radio frequency electrodes can be changed, such as... Figure 9 As shown, this is to locate the distribution of the sympathetic nervous system as accurately as possible.

[0044] The reason for using a pull rope to drive the corresponding transmission gear, thereby moving the corresponding electrode holder circumferentially and changing the circumferential position of the corresponding radiofrequency electrode, is that traditional motors are too large to be installed on the upper and lower jaws. The pull rope allows power to be transmitted from outside the patient's body to the transmission gear, thus avoiding increasing the structural size of the upper and lower jaws. In other embodiments of the invention, the motor driving the corresponding transmission gear can also be directly mounted on the upper and lower jaws; in this case, a more expensive and smaller micro-motor is required.

[0045] Implementation of radiofrequency ablation clamps, for example Figures 1-9 As shown: The specific structure of the radiofrequency ablation clamp is the same as that of the radiofrequency ablation clamp described in the above-mentioned radiofrequency ablation system embodiments, and will not be described in detail here.

[0046] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the devices or elements involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0048] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radiofrequency ablation system for renal artery sympathectomy, comprising radiofrequency ablation forceps, the forceps including a relatively openable upper jaw and a lower jaw, wherein an upper jaw radiofrequency electrode is disposed on the upper jaw and a lower jaw radiofrequency electrode is disposed on the lower jaw, characterized in that: The radiofrequency ablation system also includes a blood pressure measuring device and a power adjustment device electrically connected to the upper jaw radiofrequency electrode and the lower jaw radiofrequency electrode. There are at least three upper jaw radiofrequency electrodes, which are arranged at intervals along the left and right directions. There are at least three lower jaw radiofrequency electrodes, which are arranged at intervals along the left and right directions. The upper jaw includes an upper jaw body with an arc-shaped structure whose axis extends along the left and right directions. The upper jaw body is equipped with an upper electrode seat made of insulating material that is arranged corresponding to each upper jaw radiofrequency electrode along the circumferential guide movement. Each upper jaw radiofrequency electrode is fixed on the corresponding upper electrode seat.The jaw includes a jaw body with an arc-shaped structure extending laterally. Lower electrode holders made of insulating material are circumferentially mounted on the jaw body, corresponding to each jaw radiofrequency electrode. Each jaw radiofrequency electrode is fixed to its corresponding lower electrode holder. The radiofrequency ablation forceps also includes an electrode holder driving mechanism for driving the corresponding upper and lower electrode holders circumferentially. The electrode holder driving mechanism includes an upper electrode holder driving mechanism corresponding to each upper electrode holder and a lower electrode holder driving mechanism corresponding to each lower electrode holder. The upper electrode holder is an arc-shaped plate structure extending laterally. The upper jaw radiofrequency electrodes are fixed to the lower end of the upper electrode holder. The upper end is provided with upper electrode seat transmission teeth. Upper transmission gears, corresponding one-to-one with the upper electrode seats, are rotatably mounted on the upper jaw body. The axis of the upper transmission gears extends in the left-right direction. The upper transmission gears mesh with the upper electrode seat transmission teeth for transmission. The left and right axles of the upper transmission gears are coaxially fixed to the upper transmission gears. A left transmission rope of the upper transmission gear is wound around the left axle, and a right transmission rope of the upper transmission gear is wound around the right axle. The winding directions of the left and right transmission ropes are opposite. The upper electrode seat drive mechanism includes a mechanism connected to the left transmission rope of the upper transmission gear for transmission through the upper transmission gear. The left-side drive rope drives the upper drive gear to rotate in the forward direction via a first motor. The upper electrode holder drive mechanism also includes a second motor connected to the right-side drive rope of the upper drive gear, which drives the upper drive gear to rotate in the reverse direction via the right-side drive rope. The lower electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The lower jaw radio frequency electrode is fixed to the upper end of the lower electrode holder. The lower end of the lower electrode holder is provided with lower electrode holder drive teeth. The lower jaw body is rotatably equipped with lower drive gears that correspond one-to-one with the lower electrode holder. The axis of the lower drive gear extends in the left-right direction. The lower drive gear meshes with the lower electrode holder drive teeth for transmission. The coaxial axis of the lower drive gear is fixed. The device has a left axle and a right axle for the lower transmission gear. A left-side transmission rope is wound around the left axle, and a right-side transmission rope is wound around the right axle. The winding directions of the left and right transmission ropes are opposite. The lower electrode holder drive mechanism includes a first motor connected to the left transmission rope for driving the lower transmission gear to rotate forward via the left transmission rope, and a second motor connected to the right transmission rope for driving the lower transmission gear to rotate in the opposite direction via the right transmission rope.

2. The radiofrequency ablation system according to claim 1, characterized in that: The power adjustment device is used to output test power and ablation power to the upper jaw radio frequency electrode and the lower jaw radio frequency electrode. The test power is 1~2W and the ablation power is 8~9W.

3. A radiofrequency ablation clamp, comprising an upper jaw and a lower jaw that can be opened and closed relative to each other, wherein an upper jaw radiofrequency electrode is disposed on the upper jaw and a lower jaw radiofrequency electrode is disposed on the lower jaw, characterized in that: There are at least three upper jaw radio frequency electrodes, which are arranged at intervals along the left and right directions. There are at least three lower jaw radio frequency electrodes, which are arranged at intervals along the left and right directions. The upper jaw includes an upper jaw body with an arc-shaped structure whose axis extends along the left and right directions. The upper jaw body is equipped with an upper electrode seat made of insulating material that is arranged in a circumferentially guideable manner and corresponds to each upper jaw radio frequency electrode. Each upper jaw radio frequency electrode is fixed on its corresponding upper electrode seat.The jaw includes a jaw body with an arc-shaped structure extending laterally. Lower electrode holders made of insulating material are circumferentially mounted on the jaw body, corresponding to each jaw radiofrequency electrode. Each jaw radiofrequency electrode is fixed to its corresponding lower electrode holder. The radiofrequency ablation forceps also includes an electrode holder driving mechanism for driving the corresponding upper and lower electrode holders circumferentially. The electrode holder driving mechanism includes an upper electrode holder driving mechanism corresponding to each upper electrode holder and a lower electrode holder driving mechanism corresponding to each lower electrode holder. The upper electrode holder is an arc-shaped plate structure extending laterally. The upper jaw radiofrequency electrodes are fixed to the lower end of the upper electrode holder. The upper end is provided with upper electrode seat transmission teeth. Upper transmission gears, corresponding one-to-one with the upper electrode seats, are rotatably mounted on the upper jaw body. The axis of the upper transmission gears extends in the left-right direction. The upper transmission gears mesh with the upper electrode seat transmission teeth for transmission. The left and right axles of the upper transmission gears are coaxially fixed to the upper transmission gears. A left transmission rope of the upper transmission gear is wound around the left axle, and a right transmission rope of the upper transmission gear is wound around the right axle. The winding directions of the left and right transmission ropes are opposite. The upper electrode seat drive mechanism includes a mechanism connected to the left transmission rope of the upper transmission gear for transmission through the upper transmission gear. The left-side drive rope drives the upper drive gear to rotate in the forward direction via a first motor. The upper electrode holder drive mechanism also includes a second motor connected to the right-side drive rope of the upper drive gear, which drives the upper drive gear to rotate in the reverse direction via the right-side drive rope. The lower electrode holder is an arc-shaped plate structure with its axis extending in the left-right direction. The lower jaw radio frequency electrode is fixed to the upper end of the lower electrode holder. The lower end of the lower electrode holder is provided with lower electrode holder drive teeth. The lower jaw body is rotatably equipped with lower drive gears that correspond one-to-one with the lower electrode holder. The axis of the lower drive gear extends in the left-right direction. The lower drive gear meshes with the lower electrode holder drive teeth for transmission. The coaxial axis of the lower drive gear is fixed. The device has a left axle and a right axle for the lower transmission gear. A left-side transmission rope is wound around the left axle, and a right-side transmission rope is wound around the right axle. The winding directions of the left and right transmission ropes are opposite. The lower electrode holder drive mechanism includes a first motor connected to the left transmission rope for driving the lower transmission gear to rotate forward via the left transmission rope, and a second motor connected to the right transmission rope for driving the lower transmission gear to rotate in the opposite direction via the right transmission rope.

Images