Radio frequency ablation electrode and ablation electrode system

Abstract

The utility model relates to a radio frequency ablation electrode and an ablation electrode system, and belongs to the technical field of medical instruments. The ablation electrode system comprises a radio frequency host foot switch and a radio frequency ablation electrode, the radio frequency ablation electrode comprises an outer electrode and an inner electrode which are insulated from each other, the inner electrode is arranged in the outer electrode in a penetrating mode, and the front end of the inner electrode comprises a needle-shaped central electrode tip and at least two lateral electrode tips which can be unfolded towards the two sides or folded inwards. The radiofrequency ablation electrode and the ablation electrode system can be used in cooperation with ultrasonic detection equipment, the radiofrequency ablation electrode can penetrate into hysteromyoma, the front end of the inner electrode is unfolded in the hysteromyoma to be distributed in a plane, a plane-shaped ablation area with a certain thickness or an ablation area similar to a water drop shape is formed, and the radiofrequency ablation electrode can penetrate into the hysteromyoma. The extension length of the front end of the inner electrode determines the size of a single ablation area, other parts of hysteromyoma can be ablated by manually rotating or moving the radiofrequency ablation electrode left and right, and the ablation range is controllable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a radiofrequency ablation electrode and an ablation electrode system. BACKGROUND

[0002] The uterine fibroids are generally between 1mm-10mm in size, and treatment schemes thereof mainly fall into two categories: oral drug treatment and surgical treatment.

[0003] The oral drug treatment can only relieve some symptoms such as dysmenorrhea or menstrual abnormalities, and patients usually need to take medicine for a long time and cannot be cured completely.

[0004] The surgical treatment is further divided into several different schemes: cold knife resection, use of an electric knife for ablation, and electric knife ablation including ultrasonic ablation or microwave ablation. The cold knife resection is traumatic, causes much bleeding, has a long operation time, and has a long recovery time after operation, and patients are relatively painful, and women may even lose the ability to reproduce. The ultrasonic ablation is not complete and is prone to recurrence, and the microwave ablation has a small ablation range and an uncontrollable thermal influence range, and thus cannot achieve fine ablation and is prone to damage to other normal tissues.

[0005] Please refer to the invention patent with the authorized announcement number CN105434040B and the invention name "Umbrella-shaped radiofrequency ablation electrode needle for endoscope", and the prior art provides a radiofrequency ablation electrode that can ablate uterine fibroids through radiofrequency energy. This way is less traumatic and has a fast recovery.

[0006] However, researchers have found that the existing radiofrequency ablation electrode has an umbrella-shaped structure after the front end of the inner electrode is unfolded, this structure is difficult to enter the uterine fibroids for ablation, and can only be inserted or gradually ablated after pre-punching, and the effect is poor during the ablation process, and the ablation area is not as expected as a spherical structure. In addition, since the shape of the uterine fibroids is irregular, the depth, width, length and the like thereof can be different, and the radiofrequency ablation electrode with the umbrella-shaped front end is difficult to accurately control the ablation area. For example, if the thickness of the uterine fibroids is small, the radiofrequency ablation electrode with the spherical front end can damage the surrounding normal tissues. UTILITY MODEL CONTENTS

[0007] In view of this, the utility model aims to provide a radiofrequency ablation electrode and an ablation electrode system that can puncture into uterine fibroids for ablation, and the ablation area can be accurately controlled and is not prone to damage to normal tissues.

[0008] The technical scheme of the utility model is as follows:

[0009] The utility model provides a kind of radiofrequency ablation electrode, including mutually insulated outer electrode and inner electrode, the inner electrode is arranged in the outer electrode and front end includes needle-like central electrode head and at least two can be unfolded to two sides or inwardly gathered lateral electrode head;The radiofrequency ablation electrode has the inner electrode front end retract to the outer electrode and the central electrode head front end exposed puncture state, and the inner electrode front end is stretched out from the outer electrode and unfolds into planar distribution ablation state.

[0010] As an optional scheme, the inner electrode further includes at least three independent electrode rods, the front ends of the electrode rods are connected to the central electrode head or the lateral electrode heads, and the lateral electrode heads are pre-bent.

[0011] As an optional scheme, the inner electrode further includes electrode rods, the central electrode head is fixed to or integrally formed with the electrode rods, and the lateral electrode heads are respectively hinged to the electrode rods.

[0012] As an optional scheme, the inner electrode further includes a connecting rod, the connecting rod is connected to the lateral electrode heads and used for controlling the lateral electrode heads to unfold or gather.

[0013] As an optional scheme, the inner electrode further includes a sliding block and a connecting rod, the electrode rods are provided with sliding grooves in the front-rear direction, the connecting rod is respectively hinged to the sliding block and the lateral electrode heads, and the sliding block is slidingly matched with the sliding groove.

[0014] As an optional scheme, the outer side of the inner electrode is covered with an inner insulating layer, the inner insulating layer is triangular or trapezoidal after unfolding and matched with the front end of the inner electrode.

[0015] As an optional scheme, in the direction from back to front, the front end of the outer electrode gradually decreases in diameter.

[0016] As an optional scheme, the radiofrequency ablation electrode further includes a handle with a control member, the rear end of the outer electrode is connected to the handle, and the rear end of the inner electrode is connected to the control member and pushed forward and backward by the control member.

[0017] As an optional scheme, the control member includes two push buttons, one of the push buttons is used for controlling the inner electrode to move forward and backward, and the other push button is used for controlling the inner electrode to unfold or gather at the front end.

[0018] The utility model further provides an ablation electrode system, including radiofrequency host computer, foot switch and the above-mentioned radiofrequency ablation electrode, the radiofrequency ablation electrode is connected with the radiofrequency host computer and is controlled through the foot switch.

[0019] The utility model has the beneficial effects that:

[0020] The radiofrequency ablation electrode and ablation electrode system provided by this invention can be used in conjunction with ultrasound detection equipment. After the ultrasound detection equipment locates the uterine fibroid, the radiofrequency ablation electrode can be punctured and inserted into the fibroid. The tip of the inner electrode unfolds into a planar distribution within the fibroid, forming a planar ablation area of ​​a certain thickness or a teardrop-shaped ablation area. Under the premise that other structures are the same, compared with the conventional umbrella-shaped structure, this planar unfolding ablation not only forms a similar ablation area, but also has a simpler structure, more reliable strength, and makes it easier to determine the boundary of the ablation area. The extension length of the inner electrode tip determines the size of the ablation area in a single operation. Manually rotating or moving the radiofrequency ablation electrode left and right allows for the ablation of other parts of the uterine fibroid, achieving controllable ablation range. Using this radiofrequency ablation electrode and ablation electrode system results in short operation time, minimal trauma, less bleeding, and faster recovery. Patients experience less pain, and recurrence is less likely. Furthermore, it causes less damage to the uterus, achieving both large-area rapid ablation and precise ablation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of this utility model will become clearer through the drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main idea of ​​this utility model.

[0022] Figure 1 A schematic diagram of the structure of the radiofrequency ablation electrode (puncture state) provided in Embodiment 1 of this utility model;

[0023] Figure 2 A schematic diagram of the structure of the radiofrequency ablation electrode (ablation state) provided in Embodiment 1 of this utility model;

[0024] Figure 3 This is a partially enlarged schematic diagram of the front end of the radiofrequency ablation electrode (ablation state) provided in Embodiment 1 of this utility model;

[0025] Figure 4 for Figure 3 Side view;

[0026] Figure 5 A partial cross-sectional view of the radiofrequency ablation electrode provided in Embodiment 1 of this utility model;

[0027] Figure 6The end part of the center electrode head or the lateral electrode head of the radio frequency ablation electrode provided in the embodiment one of the utility model is shown Figure 1 ;

[0028] Figure 7 The end part of the center electrode head or the lateral electrode head of the radio frequency ablation electrode provided in the embodiment one of the utility model is shown Figure 2 ;

[0029] Figure 8 The ablation area of the radio frequency ablation electrode provided in the embodiment one of the utility model is shown

[0030] Figure 9 The internal structure of the handle of the radio frequency ablation electrode provided in the embodiment one of the utility model is shown

[0031] Figure 10 The structure of the push button of the radio frequency ablation electrode provided in the embodiment one of the utility model is shown

[0032] Figure 11 The structure of the radio frequency ablation electrode (puncture state) provided in the embodiment two of the utility model is shown

[0033] Figure 12 The structure of the radio frequency ablation electrode (ablation state) provided in the embodiment two of the utility model is shown

[0034] Figure 13 The partial sectional view of the radio frequency ablation electrode provided in the embodiment two of the utility model is shown

[0035] Figure 14 The side view of Figure 13 ;

[0036] Figure 15 The partial sectional view of the radio frequency ablation electrode provided in the embodiment two of the utility model is shown

[0037] Figure 16 The ablation area of the radio frequency ablation electrode provided in the embodiment two of the utility model is shown

[0038] Figure 17 The structure of the radio frequency ablation electrode (puncture state) provided in the embodiment three of the utility model is shown

[0039] Figure 18 The structure of the radio frequency ablation electrode (ablation state) provided in the embodiment three of the utility model is shown

[0040] Figure 19 The partial sectional view of the radio frequency ablation electrode provided in the embodiment three of the utility model is shown

[0041] Figure 20The handle internal structure schematic view of the radio frequency ablation electrode is provided for the third embodiment of the utility model.

[0042] Figure 21 The structure schematic view of the first push button of the radio frequency ablation electrode is provided for the second embodiment of the utility model.

[0043] Figure 22 The structure schematic view of the second push button of the radio frequency ablation electrode is provided for the second embodiment of the utility model.

[0044] Figure 23 The structure schematic view of the ablation electrode system in the fourth embodiment of the utility model is provided.

[0045] Figure 24 The operation schematic view of the ablation electrode system in the fourth embodiment of the utility model is provided.

[0046] Figure 25 The operation partial schematic view of the ablation electrode system in the fourth embodiment of the utility model is provided.

[0047] Icon: 10-ablation electrode system;20-ultrasonic detection device;11-radio frequency host computer;12-foot switch;13-radio frequency ablation electrode;110-handle;111-control;112-plug;113-first push button;114-first push button;120-outer electrode;121-outer insulating layer;130-inner electrode;131-electrode rod;132-central electrode head;133-lateral electrode head;134-inner insulating layer;140-connecting rod;141-sliding block;142-link;143-sliding slot. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0050] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of such items are required in the subsequent drawings once such items have been defined in one drawing.

[0051] In addition, the terms "first", "second" and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Embodiments

[0052] Please refer to Figure 1 , Figure 2 The embodiment one of the utility model provides a radio frequency ablation electrode 13, this radio frequency ablation electrode 13 can be applied to the ablation, resection etc. of uterine fibroids, of course, in some embodiments, this radio frequency ablation electrode 13 can also be applied to the ablation of other tumors. Adopt plasma ablation, and a large number of charged particles are generated by radio frequency electric field excitation electrolyte such as physiological saline, and there is enough energy to open the molecular bond of the target tissue cell, so that the tissue is rapidly decomposed into low molecular weight molecules and atoms, so as to form high-efficiency tissue ablation, cutting, coagulation hemostasis effect at lower temperature, and the heat damage range is small.

[0053] Among them, the radio frequency ablation electrode 13 is mainly composed of handle 110, outer electrode 120 and inner electrode 130, the following is in detail to each component of radio frequency ablation electrode 13.

[0054] First of all, it needs to be pointed out that the "front", "back" mentioned in the embodiment is determined according to the positional relationship with the lesion site, close to the lesion site is "front", far away from the lesion site is "back", the front end is the proximal end, and the rear end is the distal end. In addition, the orientation terms in the embodiment are relative positions defined by man, not absolute positions, for example, in other embodiments, close to the lesion site can be "back", far away from the lesion site can be "front", or defined according to the position relationship with medical staff, etc.

[0055] Handle 110 is mainly used for medical staff to hold and control, the structure and shape of handle 110 are not limited, which can refer to prior art, for example, handle 110 is generally cylindrical, prismatic, flat shell, irregular shape, etc. The inside of handle 110 can be hollow, and wires can be arranged inside, in addition, handle 110 can be divided into two half shells that can be separated or buckled, etc. The rear end of handle 110 is connected with plug 112, plug 112 is used for electrically connecting with external radio frequency host (please refer to embodiment two), the shape and structure of plug 112 need to cooperate with the plug-in hole of radio frequency host. When plug 112 is plugged and matched with radio frequency host, radio frequency host can provide radio frequency energy for radio frequency ablation electrode 13.

[0056] The rear end of the outer electrode 120 is connected with the handle 110 and fixed therebetween, and the connection manner is not limited, for example, bonding, welding, crimping, clamping and the like. In the embodiment, the rear end of the outer electrode 120 can also be inserted into the handle 110 and fixed by the handle 110.

[0057] The shape of the outer electrode 120 is not limited, and can be a tubular structure, for example, a circular tube, a square tube, an irregular tube and the like, and the size thereof can be set as required. In the embodiment, the outer electrode 120 adopts a circular tube shape, and the outer diameter of the outer electrode 120 is 1 mm-7 mm, preferably 3.6 mm, 4.8 mm, 6 mm and the like.

[0058] The inner portion of the outer electrode 120 is hollow, and the front end thereof is open. Of course, the rear end of the outer electrode 120 can also be open. In other embodiments, the outer electrode 120 can also adopt a rod-shaped structure, a C-shaped tubular structure and the like. Generally, the outer electrode 120 needs to have a certain strength so as not to be easily bent. Of course, the outer electrode 120 can also be arbitrarily bent.

[0059] Part or all of the outer electrode 120 can be conductive, and the conductive part can be made of a conductive metal material or other material. In the embodiment, the outer electrode 120 is made of a conductive material as a whole, and the outer side thereof can be covered with an outer insulating layer 121. The rear end of the outer electrode 120 is electrically connected with the plug 112. The outer diameter of the outer electrode 120 mentioned above can be the outer diameter including the outer insulating layer 121, or can be the outer diameter not including the outer insulating layer 121. In other embodiments, the front end or the front half of the outer electrode 120 is made of a conductive material, and the other part is made of a non-conductive material. At this time, the conductive part needs to be electrically connected with the plug 112 through a conductive structure such as a connecting wire.

[0060] The front end of the outer electrode 120 is a working part, and the working part is exposed, that is, the outer side of the part is not covered with an insulating layer. The length of the working part is not limited, and can be set as required, for example, 1 mm-15 mm, preferably 8 mm, 10 mm. The part outside the working part of the outer electrode 120 can be covered with an insulating layer, or can be partially exposed. Alternatively, only the working part of the outer electrode 120 is made of a conductive material, and the other part is made of a non-conductive material.

[0061] The shape of the working part of the outer electrode 120 is not limited, and can be a circular tube shape with equal diameters from front to back. In the embodiment, in the direction from back to front, the diameter of the working part gradually decreases, that is, the port of the outer electrode 120 is inwardly tapered, and the oblique angle of the outer surface is A. The angle of the oblique angle is not limited, for example, ∠A≤20°, preferably 15°. In this way, the front end of the radiofrequency ablation electrode 13 is relatively sharp, and the radiofrequency ablation electrode 13 is facilitated to pierce into the uterine fibroids or the uterine wall.

[0062] The inner electrode 130 is arranged in the outer electrode 120 and can slide in the outer electrode 120 in the front-rear direction, and the front end of the inner electrode 130 can be extended from or retracted into the front end of the outer electrode 120.

[0063] The inner electrode 130 and the outer electrode 120 are insulated, and it should be noted that "insulation" here refers to insulation in the ablation state, and can not be insulated in the non-ablation state.

[0064] Specifically, please refer to Figures 3-5 As shown in the figure, the inner electrode 130 includes a connecting rod 140 and an electrode head assembly, and the electrode head assembly is located at the front end of the connecting rod 140.

[0065] The electrode rod 131 can be a rod structure or a tubular structure, etc., and the electrode rod 131 needs to have a certain strength to ensure that it can push the electrode head assembly to extend from or retract into the front end of the outer electrode 120 when sliding in the outer electrode 120.

[0066] The length of the electrode rod 131 matches the length of the outer electrode 120, and the rear end of the electrode rod 131 can extend from the rear end of the outer electrode 120, of course, the rear end of the electrode rod 131 cannot extend from the rear end of the outer electrode 120. The number of electrode rods 131 is not limited, for example, one, two, three, etc., and the number of electrode rods 131 also determines the connection method of the electrode head assembly.

[0067] The electrode head assembly is mainly composed of a center electrode head 132 and a lateral electrode head 133, and the lateral electrode head 133 is located on both sides of the center electrode head 132. The center electrode head 132 and the lateral electrode head 133 can be integrated or separated.

[0068] The style and size of the center electrode head 132 and the lateral electrode head 133 are not limited, for example, the cross section of the center electrode head 132 and the lateral electrode head 133 is circular or square, etc., in this embodiment, the cross section of the center electrode head 132 and the lateral electrode head 133 is circular, wherein the diameter of the center electrode head 132 is 0.3mm-3mm, preferably 0.9mm, 1.2mm, 1.6mm, 2.3mm, etc., and the diameter of the lateral electrode head 133 is 0.3mm-3mm, preferably 0.9mm, 1.2mm, 1.6mm, 2.3mm, etc. The diameters of the center electrode head 132 and the lateral electrode head 133 can be equal or not equal.

[0069] The number of center electrode heads 132 is generally one, of course, in some embodiments, the number of center electrode heads 132 is two or three. Figure 6 , Figure 7As shown, the center electrode head 132 adopts a needle-like structure and has a certain hardness, and the front end thereof can be conical or angular, and the front end is relatively sharp and can be inserted into the uterine fibroids.

[0070] The number of the lateral electrode heads 133 is at least two, such as two, three, four, etc. In the embodiment, the number of the lateral electrode heads 133 is two, and the two lateral electrode heads 133 are distributed on the two sides of the center electrode head 132, and the two lateral electrode heads 133 can be symmetrical or not. The lateral electrode heads 133 can adopt a needle-like structure or a non-needle-like structure.

[0071] The arrangement mode of the center electrode head 132 and the lateral electrode head 133 and the connection mode of the two with the electrode rod 131 are not limited. In the embodiment, the center electrode head 132 and the lateral electrode head 133 are independent of each other, the number of the electrode rods 131 is three, and the three electrode rods 131 are independent of each other, one of the electrode rods 131 is fixedly connected or integrally formed with the center electrode head 132, and the other two electrode rods 131 are fixedly connected or integrally formed with the two lateral electrode heads 133, respectively.

[0072] The center electrode head 132 and the lateral electrode head 133 are made of conductive materials, and form two poles of radio frequency ablation with the outer electrode 120. The electrode rod 131 can be conductive or not.

[0073] If the electrode rod 131 is made of conductive material, the outer side thereof needs to be covered with an inner insulation layer 134 to insulate between the two adjacent electrode rods 131 and between the electrode rod 131 and the outer electrode 120. The inner insulation layer 134 can extend to the center electrode head 132 or the lateral electrode head 133, so that the front end of the center electrode head 132 or the lateral electrode head 133 is exposed. The exposed length of the front end of the center electrode head 132 or the lateral electrode head 133 is not limited, for example, the exposed length of the center electrode head 132 is L1, L1 is 1mm-15mm, preferably 8mm or 10mm, and the exposed length of the lateral electrode head 133 is L2, L2 is 1mm-15mm, preferably 6mm or 8mm.

[0074] If the electrode rod 131 is made of non-conductive material, a connecting wire needs to be additionally provided to electrically connect the electrode head assembly with the plug 112. At this time, the outer side of the center electrode head 132 and the lateral electrode head 133 needs to be covered with an inner insulation layer 134, and the front end of the two is exposed.

[0075] The two lateral electrode heads 133 can be spread or contracted to the two sides of the central electrode head 132: when the two lateral electrode heads 133 are spread to the two sides of the central electrode head 132, the electrode head assembly is in a planar distribution, that is, the center lines of the central electrode head 132 and the two lateral electrode heads 133 are in the same plane, and of course, slight deviation is also allowed; when the two lateral electrode heads 133 are contracted to the central electrode head 132, the lateral electrode heads 133 and the central electrode head 132 are close to each other, and the spacing is small, and can be retracted into the outer electrode 120 from the front end opening of the outer electrode 120.

[0076] When the two lateral electrode heads 133 are contracted towards the central electrode head 132, the front end of the lateral electrode head 133 can be flush with the front end of the central electrode head 132, or can be slightly behind.

[0077] The spreading and contracting of the lateral electrode heads 133 is not limited, and in the embodiment, the lateral electrode heads 133 are pre-bent, that is, when the lateral electrode heads 133 are not compressed by external force, they can naturally bend outward, and when they are compressed by a certain degree of force, for example, by the front end opening of the outer electrode 120, they can be deformed, straightened, etc. It should be noted that the lateral electrode heads 133 need to have a certain strength after bending, that is, only when a force exceeding the preset force threshold is applied, can the lateral electrode heads 133 be deformed, so as to prevent deformation under the compression of uterine fibroids, etc. The preset force threshold can be set artificially, and can be realized by changing the material of the lateral electrode heads 133, etc.

[0078] The pre-bending angle of the lateral electrode heads 133 is not limited and can be 0 (not included) -60°, for example, 10°, 20°, 30°, 45°, 50°, 60°, etc., and preferably 30° or 45°. It should be noted that the "pre-bending angle" referred to here refers to the maximum opening angle of the lateral electrode heads 133, and under the limiting action of the outer electrode 120, the opening angle of the lateral electrode heads 133 can vary within the maximum opening angle, for example, if the pre-bending angle is 30°, the opening angle of the lateral electrode heads 133 can be 5°, 10°, 20°, 30°, etc. under the action of external force. The opening angle of the lateral electrode heads 133 is related to the length of the electrode head assembly extending from the outer electrode 120, that is, within the maximum opening angle, the greater the length of the electrode head assembly extending from the outer electrode 120, the greater the opening angle of the lateral electrode heads 133.

[0079] The radio frequency ablation electrode 13 provided in the embodiment has two states, which are a puncture state and an ablation state.

[0080] Please refer to Figure 1As shown, when the radio frequency ablation electrode 13 is in the puncture state, the electrode head assembly is retracted into the outer electrode 120, the lateral electrode head 133 is folded under the extrusion of the outer electrode 120 and is close to the central electrode head 132, it should be noted that the "the front end of the inner electrode 130 is retracted into the outer electrode 120" in the embodiment is not that the electrode head assembly is retracted into the outer electrode 120 completely, but is partially or mostly retracted into the outer electrode 120, the front end of the central electrode head 132 needs to be exposed outside the outer electrode 120. Since the front end of the central electrode head 132 is relatively sharp, when the radio frequency ablation electrode 13 is inserted into the uterine fibroids or uterine wall, the inner electrode 130 can not work, the central electrode head 132 can be pierced until the radio frequency ablation electrode 13 is inserted in place, without the need for additional auxiliary perforating instruments.

[0081] In the above state, the front end of the lateral electrode head 133 can be exposed or completely hidden inside the outer electrode 120, that is, the front end of the central electrode head 132 and the two lateral electrode heads 133 are exposed outside the outer electrode 120, at this time, the lateral electrode head 133 can also adopt a needle structure, that is, the front end is relatively sharp, which is convenient for piercing into the uterine fibroids or uterine wall; or the front end of the central electrode head 132 is exposed outside the outer electrode 120, and the front end of the two lateral electrode heads 133 is completely in the outer electrode 120, at this time, the front end of the lateral electrode head 133 can adopt a needle structure or a blunt structure; or the front end of the central electrode head 132 is exposed outside the outer electrode 120, one of the two lateral electrode heads 133 is exposed outside the outer electrode 120 and adopts a needle structure, and the other is completely in the outer electrode 120 and can adopt a needle structure or a blunt structure. Of course, even if the lateral electrode head 133 is exposed, the front end can also adopt a blunt structure.

[0082] Please refer to Figure 8As shown, when the radio frequency ablation electrode 13 is in the ablation state, the electrode head assembly protrudes from the front end of the outer electrode 120, and the electrode head assembly can partially or fully protrude, and the protruding length of the electrode head assembly is different, and the area after unfolding will also change, and the size of the ablation area can be changed to adapt to the ablation of uterine fibroids of different sizes. At this time, part or all of the lateral electrode head 133 is separated from the extrusion of the outer electrode 120, and automatically resets and expands outward under the elastic action of itself, and the electrode head assembly expands into a plane distribution, that is, the lateral electrode head 133 expands towards the two sides of the central electrode head 132, and after expansion, it is similar to a trident shape, and the front end of the central electrode head 132 is farther away from the outer electrode 120 than the front end of the lateral electrode head 133. The maximum distance between the front ends of the two lateral electrode heads 133 is L, L is 10mm-120mm, preferably 30mm, 50mm / 80mm, etc., the larger the value of L, the larger the ablation area, and different L values of the radio frequency ablation electrode 13 can be selected according to the size of the uterine fibroid.

[0083] In the above state, the lateral electrode head 133 is more rearward relative to the central electrode head 132, and the front ends of the central electrode head 132 and the lateral electrode head 133 are approximately arc-shaped distributed, and the front end of the ablation area is approximately arc-shaped.

[0084] The inner electrode 130 and the outer electrode 120 are electrically connected to two poles of a radio frequency host through the plug 112, and the radio frequency host can provide radio frequency energy for the radio frequency ablation electrode 13 to ablate, cut, coagulate and stop bleeding, etc.

[0085] The front and rear movement of the inner electrode 130 can be controlled by the handle 110, and the control mode and structure of the handle 110 are not limited, and can refer to the prior art. In the embodiment, please refer to Figure 9 、 Figure 10 As shown, the control member 111 is provided on the handle 110, and the control member 111 includes a push button which can slide on the handle 110 in the front and rear directions, and the rear end of the inner electrode 130, i.e. the rear end of the electrode rod 131, is connected with the push button, and by pushing the push button forward and backward, the inner electrode 130 can be driven to move forward and backward.

[0086] In other embodiments, the control member 111 can also adopt other schemes, for example: the control member 111 includes a knob which is rotationally arranged on the handle 110, and the rear end of the inner electrode 130 is connected with a threaded rod which is rotationally supported in the handle 110, and the outer thread is threadedly engaged with the inner thread, and when the medical staff rotates the knob, the threaded rod can be driven to rotate, and in turn drive the inner electrode 130 to slide forward and backward. Embodiment

[0087] Please refer to Figure 11 、 Figure 12As shown, the embodiment two of the utility model provides a kind of radiofrequency ablation electrode 13, the radiofrequency ablation electrode 13 is improved on the basis of embodiment one, the improvement point is in the structure and the unfolding mode etc of electrode head assembly, the part not mentioned in this embodiment can refer to embodiment one or prior art.

[0088] Specifically, please combine Figures 13-15 As shown, the number of electrode stem 131 is one, electrode stem 131 is rod structure, and the two sides of electrode stem 131 are provided with sliding groove 143, sliding groove 143 extends along the front-back direction of electrode stem 131, and center electrode head 132 and lateral electrode head 133 are connected with electrode stem 131 respectively.

[0089] Center electrode head 132 is fixedly connected with electrode stem 131 or integrally formed, that is, center electrode head 132 and electrode stem 131 can be independently arranged and connected, or the front end of electrode stem 131 can be regarded as center electrode head 132.

[0090] Two lateral electrode heads 133 are hingedly connected with electrode stem 131, and the hinged position and hinged mode of lateral electrode head 133 and electrode stem 131 are not limited, in the embodiment, the rear end of lateral electrode head 133 is hingedly connected with electrode stem 131, and the hinged shaft can be located in sliding groove 143.

[0091] If center electrode head 132 is integrally formed with electrode stem 131, and sliding groove 143 and other structures need to be arranged on electrode stem 131, while the puncture strength of center electrode head 132 needs to be ensured, therefore the diameter of center electrode head 132 can be greater than the diameter of lateral electrode head 133.

[0092] In addition, inner electrode 130 also includes sliding block 141 and connecting rod 142.

[0093] Sliding block 141 is slidingly embedded in sliding groove 143 and cooperates with each other, and sliding block 141 can slide along sliding groove 143, and the cooperation mode of sliding block 141 and sliding groove 143 is not limited, for example, the cross section of both is T-shaped or arc-shaped.

[0094] The two ends of connecting rod 142 are hingedly connected with sliding block 141 and lateral electrode head 133 respectively, that is, connecting rod 142 and sliding block 141, and connecting rod 142 and lateral electrode head 133 can relatively rotate, when sliding block 141 slides along sliding groove 143, lateral electrode head 133 can be driven to unfold or fold through connecting rod 140, or when lateral electrode head 133 unfolds or folds, sliding block 141 can be pushed to slide in sliding groove 143 through connecting rod 140.

[0095] In addition, it should be noted that the electrode rod 131 and the lateral electrode head 133 need to be conductive, which can be achieved by the hinge shaft of the electrode rod 131 and the lateral electrode head 133, or by the electrode rod 131, the sliding block 141, the connecting rod 140, and the like. Therefore, the sliding block 141, the connecting rod 140, the hinge shaft, and the like are preferably made of metal materials conducive to conduction, while ensuring sufficient strength.

[0096] In the above structure, in order to insulate the electrode head assembly and the outer electrode 120, the inner electrode 130 can also be wrapped in the same inner insulation layer 134. Specifically, the outer side of the inner electrode 130 is coated with the inner insulation layer 134, and the front end of the inner insulation layer 134 is unfolded to form a triangle or trapezoid shape and matches the shape of the unfolded electrode head assembly. Of course, in other embodiments, the electrode rod 131, the central electrode head 132, and the lateral electrode head 133 can be respectively coated with the inner insulation layer 134.

[0097] When the radio frequency ablation electrode 13 provided by the embodiment is in a puncture state, the orientations of the lateral electrode head 133 and the central electrode head 132 can have a small included angle. Please refer to Figure 16 When the electrode head assembly is pushed out of the front end of the outer electrode 120, the lateral electrode head 133 will be unfolded under the restriction of the uterine fibroids during the insertion of the central electrode head 132 into the uterine fibroids. The deeper the insertion, the greater the unfolding range of the lateral electrode head 133. Of course, in some embodiments, the unfolding or folding of the lateral electrode head 133 can also be controlled by adding other structures, for example, a control rod is provided in the outer electrode 120, the front end of the control rod is connected with the sliding block 141 or the lateral electrode head 133, and the rear end extends into the handle 110.

[0098] Compared with the scheme in the first embodiment, the scheme in the embodiment has the following advantages: the exposed areas of the central electrode head 132 and the lateral electrode head 133 are larger, the ablation efficiency is higher, and the ablation area is larger; the structure of the electrode head assembly is more stable, which can ensure that the central electrode head 132 and the lateral electrode head 133 are in the same plane after unfolding; the radio frequency ablation electrode 13 is easier to rotate, and the central electrode head 132 and the lateral electrode head 133 are not easy to deform or change the ablation area under the extrusion of uterine fibroids and the like. Embodiment

[0099] Please refer to Figure 17 , Figure 18 The third embodiment of the utility model provides a radio frequency ablation electrode 13, which is improved on the basis of the first embodiment or the second embodiment. The improvement point is the structure and unfolding mode of the electrode head assembly, and the parts not mentioned in the embodiment can be referred to the first embodiment or the second embodiment or the prior art.

[0100] Specifically, please combine Figure 19 As shown in the figure, the number of electrode rods 131 is one, and the center electrode head 132 and the lateral electrode head 133 are respectively connected with the electrode rod 131.

[0101] Among them, the center electrode head 132 is fixedly connected or integrally formed with the electrode rod 131, that is, the center electrode head 132 and the electrode rod 131 can be independently arranged and connected, or the front end of the electrode rod 131 can be regarded as the center electrode head 132.

[0102] The two lateral electrode heads 133 are respectively hinged with the electrode rod 131, and the hinged position and hinged mode of the lateral electrode head 133 with the electrode rod 131 are not limited, for example, the rear end of the lateral electrode head 133 is hinged with the electrode rod 131, and the hinge shaft extends along the left and right directions of the radio frequency ablation electrode 13. In this embodiment, one side of the lateral electrode head 133 is provided with a connecting part, the connecting part is close to the rear end of the lateral electrode head 133, and the connecting part is hinged with the electrode rod 131.

[0103] In addition, the inner electrode 130 further comprises a connecting rod 140, and the number of the connecting rod 140 is not limited, which can be one or two, that is, one connecting rod 140 can control all lateral electrode heads 133 at the same time, or one electrode rod 131 can control one lateral electrode head 133. In this embodiment, the number of the connecting rod 140 is two, and the two connecting rods 140 correspond to the two lateral electrode heads 133 one by one.

[0104] The connecting rod 140 can be arranged in the outer electrode 120, or in the electrode rod 131, or in the inner insulating layer 134, and the front end of the connecting rod 140 is connected with the rear end of the lateral electrode head 133, which can be hinged or fixedly connected. The connecting rod 140 can be made of conductive material or non-conductive material, and the connecting rod 140 needs to have certain strength to control the rotation of the lateral electrode head 133 when the connecting rod 140 moves forward and backward, so as to expand or retract the lateral electrode head 133.

[0105] In the above structure, since the connecting rod 140 is added, the forward and backward movement of the inner electrode 130 and the expansion or retraction of the lateral electrode head 133 need to be controlled by different structures, therefore, in this embodiment, please combine Figures 20-22 As shown in the figure, the control member 111 comprises two push buttons, which are a first push button 113 and a second push button.

[0106] Among them, the first push button 113 is connected with the rear end of the inner electrode 130, that is, the rear end of the electrode rod 131, for controlling the forward and backward movement of the inner electrode 130, and the second push button is connected with the rear end of the connecting rod 140, for controlling the expansion or retraction of the front end of the inner electrode 130.

[0107] When the first push button 113 is pushed forward and backward, the inner electrode 130 can move forward and backward as a whole, so that the electrode head assembly is extended from the front end of the outer electrode 120 or retracted into the outer electrode 120; when the electrode head assembly of the inner electrode 130 is extended out of the outer electrode 120, the second push button is pushed forward and backward, so that the connecting rod 140 moves forward and backward, thereby rotating the lateral electrode head 133, and then unfolding or folding the lateral electrode head 133.

[0108] Compared with the scheme in Embodiment Two, the scheme in the present embodiment has the following advantages: no chute 143, sliding block 141 and the like are arranged, and it is not easy to fill with waste tissues and the like; the structure is more simple and durable, and is not prone to failure; the assembly of the radiofrequency ablation electrode 13 is more convenient, and the manufacturing is more convenient. Embodiment

[0109] Please refer to Figures 23-25 The embodiment four of the utility model provides an ablation electrode system 10, the ablation electrode system 10 generally needs to cooperate with ultrasonic detection equipment 20 and uses, and the ultrasonic detection equipment 20 can detect the position of uterine fibroids, and the ablation electrode system 10 can be stabbed into uterine fibroids and ablates it.

[0110] Among them, the ablation electrode system 10 is mainly composed of radio frequency host 11, foot switch 12 and radiofrequency ablation electrode 13, and the structure of radiofrequency ablation electrode 13 can refer to prior art.

[0111] Radiofrequency ablation electrode 13 is connected with radio frequency host 11, and the connection mode of the two can refer to prior art, and the outer electrode 120 and inner electrode 130 of radiofrequency ablation electrode 13 are connected with two poles of radio frequency host 11 respectively, and radio frequency host 11 can provide radiofrequency energy, so that the front end of radiofrequency ablation electrode 13 ablates uterine fibroids.

[0112] Radiofrequency ablation electrode 13 can be controlled by foot switch 12, and foot switch 12 can control but not limited to the functions such as opening or closing of radiofrequency ablation electrode 13, radiofrequency energy size and the like.

[0113] The working method of the ablation electrode system 10 provided by the present embodiment is as follows:

[0114] Send ultrasonic detection equipment 20 into the uterus, detect the position of myoma, and display the position and size of uterine fibroids and the like information on the external display;

[0115] Send radiofrequency ablation electrode 13 into the uterus, at this time, radiofrequency ablation electrode 13 is in the puncture state;

[0116] At the front end of radiofrequency ablation electrode 13, the center electrode head 132 and the outer electrode 120 form a sharp front end, which can be punctured into uterine fibroids;

[0117] Push the push button on the handle 110, so that the electrode head assembly extends from the front end of the outer electrode 120, and the lateral electrode head 133 expands outward, so that the electrode head assembly expands into a planar distribution, covering the entire myoma, so that the radiofrequency ablation electrode 13 is in the ablation state. According to the size of the myoma, different ablation areas can be obtained by controlling the extension length of the electrode head assembly;

[0118] The medical staff steps on the foot switch 12, and the radiofrequency host 11 provides energy to make the radiofrequency ablation electrode 13 work to perform radiofrequency ablation on the myoma;

[0119] During the ablation of the myoma, the radiofrequency ablation electrode 13 can be slowly moved or rotated on both sides, so that the electrode head assembly can ablate the myoma around the uterus. The angle of manual rotation or the distance of movement determines the ablation range, realizes controllable ablation range, and ensures that the entire myoma can be ablated;

[0120] After ablation is completed, the push button on the handle 110 is pushed backward, so that the inner electrode 130 slides backward relative to the outer electrode 120, and the electrode head assembly is retracted into the outer electrode 120, so that the radiofrequency ablation electrode 13 is in the puncture state. At this time, the front end of the center electrode head 132 can be exposed;

[0121] The radiofrequency ablation electrode 13 and the ultrasonic detector are pushed out in turn;

[0122] The wound is treated, and the finishing work of the operation is completed.

[0123] During the ablation process, a certain thickness of planar ablation area is formed in the first few seconds of work (generally within 5 seconds, depending on the output gear of the radiofrequency host 11). If the working time is too long, a water droplet-shaped ablation area will eventually be formed due to the heat effect of plasma ablation. When precise ablation is required, only the first few seconds of work can be performed, and then rotated or moved to the target position for precise ablation. Even if the first few seconds of ablation are not in place, the ablation area overlap part after manually rotating or moving the radiofrequency ablation electrode 13 can continue to ablate.

[0124] The above steps can be increased, reduced, modified, adjusted in order, etc. according to needs, for example: the puncture work can also choose the punching mode of the radiofrequency host 11 to assist in puncture, that is, the radiofrequency ablation electrode 13 does not need to puncture, and after positioning to the target position, the ablation mode of the radiofrequency host 11 is selected for ablation; or during the puncture process, the electrode head assembly gradually expands, and after the puncture is completed, the center electrode head 132 and the lateral electrode head 133 ablate at the same time; if the extension and front end expansion of the inner electrode 130 are controlled by two push buttons, then adaptive adjustment can be made, that is, the first push button 113 controls the extension of the front end of the inner electrode 130, and then the second push button controls the expansion of the front end of the inner electrode 130.

[0125] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A radio frequency ablation electrode, characterized by, The radio frequency ablation electrode comprises an outer electrode and an inner electrode insulated from each other, the inner electrode is arranged in the outer electrode and has a needle-shaped center electrode head and at least two lateral electrode heads capable of being unfolded to both sides or being folded inward at the front end; the radio frequency ablation electrode has a puncture state in which the front end of the inner electrode is retracted into the outer electrode and the front end of the center electrode head is exposed, and an ablation state in which the front end of the inner electrode is extended out of the outer electrode and unfolded into a planar distribution.

2. The radio frequency ablation electrode of claim 1, wherein, The inner electrode further comprises at least three independent electrode rods, the front ends of the electrode rods are connected to the center electrode head or the lateral electrode heads, and the lateral electrode heads are pre-bent.

3. The radio frequency ablation electrode of claim 1, wherein, The inner electrode further comprises electrode rods, the center electrode head is fixed or integrally formed with the electrode rods, and the lateral electrode heads are respectively hinged to the electrode rods.

4. The radio frequency ablation electrode of claim 3, wherein, The inner electrode further comprises connecting rods connected to the lateral electrode heads and used for controlling the lateral electrode heads to unfold or fold.

5. The radio frequency ablation electrode of claim 3, wherein, The inner electrode further comprises sliders and connecting rods, the electrode rods are provided with sliding grooves in the front-rear direction, the connecting rods are respectively hinged to the sliders and the lateral electrode heads, and the sliders are in sliding fit with the sliding grooves.

6. The radio frequency ablation electrode of claim 3, wherein, The outer side of the inner electrode is covered with an inner insulation layer, the front end of the inner insulation layer is triangular or trapezoidal when unfolded and matches the front end of the inner electrode.

7. The radio frequency ablation electrode of claim 1, wherein, In the direction from back to front, the diameter of the front end of the outer electrode gradually decreases.

8. The radio frequency ablation electrode of claim 1, wherein, The radio frequency ablation electrode further comprises a handle with a control member, the rear end of the outer electrode is connected to the handle, and the rear end of the inner electrode is connected to the control member and is pushed forward and backward by the control member.

9. The radio frequency ablation electrode of claim 8, wherein, The control member comprises two push buttons, one of the push buttons is used for controlling the forward and backward movement of the inner electrode, and the other push button is used for controlling the unfolding or folding of the front end of the inner electrode.

10. An ablation electrode system, characterized by, The radio frequency ablation electrode comprises a radio frequency host, a foot switch and the radio frequency ablation electrode according to any one of claims 1-9, the radio frequency ablation electrode is connected to the radio frequency host and is controlled through the foot switch.

Images