Umbrella-shaped twisted electrode

Abstract

The utility model provides an umbrella-shaped twisted electrode which comprises an electrode base, an electrode fixing disc and an electrode arm assembly, the electrode base is vertically placed and is of a tubular structure, the electrode fixing disc is arranged in the electrode base in a sliding mode, the electrode base is an electric conductor, the electrode fixing disc is an insulator, and the electrode arm assembly is arranged on the electrode fixing disc. The electrode arm assembly comprises at least four twisted electrode arms, each twisted electrode arm comprises at least two electrode arc-shaped sections which are sequentially connected, the bottoms of the twisted electrode arms are fixed to the electrode fixing disc, and the positions of the circular arc circle center points of the at least two electrode arc-shaped sections are different. The electrode arm is designed to be a twisted electrode arm, and non-hemispherical tumor cell tissues can be ablated, so that the human tissues are better protected, and the success rate of an operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radiofrequency ablation technology for in-vivo tumors, and particularly relates to an umbrella-shaped twisted electrode. Background Art

[0002] When treating malignant tumors by using radiofrequency ablation technology, first, a medical imaging device is relied on to accurately locate the malignant tumors in a patient's body. Then, radiofrequency ablation electrode needles of different shapes are inserted into the malignant tumor tissues of the patient. The alternating current (100 kHz - 3 MHz) generated by a radiofrequency generator makes the conductive ions (mainly Na+, K+ and Cl-) and polarized molecules in the tissue move at high speed along the direction of the radiofrequency current to generate Joule heat. The heat energy gradually conducts outward to tumor cells over time. Utilizing the characteristic that tumor cells have poor tolerance to high temperature, the in-situ inactivation of tumor cells is completed.

[0003] The existing radiofrequency ablation electrode needles are in a regular umbrella shape, and each electrode is in a standard parabolic shape, resulting in the ablation range of the umbrella-shaped electrode being a standard mushroom shape, that is, the range of inactivated tumor cells is mostly a standard hemispherical shape. If the shape of the tumor does not conform to the hemispherical shape, it is easy to cause bleeding of tissues and organs, or the heat is carried away by the blood flow near blood vessels, affecting the accumulation of heat, causing the shrinkage of the heat-affected area and insufficient tumor ablation, resulting in surgical failure. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide an umbrella-shaped twisted electrode, designing the electrode arms as twisted electrode arms, which can ablate non-hemispherical tumor cell tissues, thereby better protecting human tissues and improving the success rate of surgery.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An umbrella-shaped twisted electrode, comprising an electrode base, an electrode fixing disk and an electrode arm assembly. The electrode base is placed vertically and is of a tubular structure. The electrode fixing disk is slidably arranged in the electrode base. The electrode base is a conductor, and the electrode fixing disk is an insulator. The electrode arm assembly includes at least four twisted electrode arms. Each twisted electrode arm includes at least two sequentially connected electrode arc segments. The bottom of the twisted electrode arm is fixed on the electrode fixing disk, and the positions of the center points of the arcs of at least two electrode arc segments are different.

[0007] Further, the twisted electrode arm is a single electrode arm.

[0008] Further, the twisted electrode arm is a multi-segment electrode arm. The multi-segment electrode arm includes at least two electrode arm segments and an insulating sleeve for connecting two adjacent electrode arm segments. Both the electrode arm segments and the insulating sleeve are tubular structures. Two opposite electrode arm segments are inserted and fixed on the same insulating sleeve, and a power transmission line with an insulating skin is electrically connected in the inner hole of each electrode arm segment.

[0009] Further, the bending shape and size of the insulating sleeve are adapted to the bending shapes and sizes of the two electrode arm segments connected thereto. The wall thickness of the insulating sleeve is greater than the wall thicknesses of the two electrode arm segments connected thereto. Step surfaces are machined on the circumferences at both ends of the outer tube wall of the insulating sleeve, and the two electrode arm segments connected thereto are respectively inserted and fixed on the step surfaces at both ends of the insulating sleeve.

[0010] Further, each twisted electrode arm includes two, three, four, five or six electrode arm segments.

[0011] Further, the twisted electrode arm includes two sequentially connected electrode arc segments.

[0012] Further, one of the twisted electrode arms includes a first electrode arc segment that deflects 30° to the right and extends upward and a second electrode arc segment that is smoothly connected to the first electrode arc segment, extends forward, forms an angle of 45° with the vertical plane and is in a semi-circular arc shape.

[0013] Further, the twisted electrode arm includes four sequentially connected electrode arc segments.

[0014] Further, one of the twisted electrode arms includes a third electrode arc segment that arches forward and upward to the right, a fourth electrode arc segment that concaves downward and backward, a fifth electrode arc segment that arches forward and upward to the right, and a sixth electrode arc segment that extends downward.

[0015] Further, one of the twisted electrode arms includes a seventh electrode arc segment that arches upward, an eighth electrode arc segment that concaves downward, a ninth electrode arc segment that arches upward, and a tenth electrode arc segment that extends downward. The seventh electrode arc segment, the eighth electrode arc segment, the ninth electrode arc segment, and the tenth electrode arc segment are in the same vertical plane.

[0016] The beneficial effects of the present utility model are as follows: Each electrode arm is designed as a twisted electrode arm, which can ablate non-hemispherical tumor cell tissues, thereby better protecting human tissues and improving the success rate of the operation. Description of the Drawings

[0017] Figure 1 is a perspective view of an embodiment of the umbrella-shaped twisted electrode according to an embodiment of the present utility model;

[0018] Figure 2 For the Figure 1 top view corresponding to the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0019] Figure 3 Stereogram of an embodiment of the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0020] Figure 4 For the Figure 3 top view corresponding to the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0021] Figure 5 Stereogram of an embodiment of the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0022] Figure 6 For the Figure 5 top view corresponding to the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0023] Figure 7 Stereogram of an embodiment of the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0024] Figure 8 For the Figure 7 top view corresponding to the umbrella-shaped twisted electrode in the embodiment of the present utility model;

[0025] Figure 9 Partial cross-sectional view showing the plug-in fixation between the insulating sleeve and the electrode arm segment connected thereto in the multi-segment electrode arm in the embodiment of the present utility model;

[0026] Figure 10 Top view of the electrode fixing plate in the embodiment of the present utility model.

[0027] Reference numeral description:

[0028] 1. Electrode base; 2. Electrode fixing plate; 3. Twisted electrode arm;

[0029] 21. Electrode mounting hole;

[0030] 301. Electrode arc segment; 302. Electrode arm segment; 303. Insulating sleeve; 304. Power transmission line; 305. First electrode arc segment; 306. Second electrode arc segment; 307. Third electrode arc segment; 308. Fourth electrode arc segment; 309. Fifth electrode arc segment; 310. Sixth electrode arc segment. Detailed implementation manners

[0031] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0032] Please refer to Figures 1 to 10 , the embodiments provided by the present utility model are as follows:

[0033] An umbrella-shaped twisted electrode includes an electrode base 1, an electrode fixing disk 2, and an electrode arm assembly. The electrode base 1 is placed vertically and is a tubular structure. The electrode fixing disk 2 is slidably disposed within the electrode base 1. The electrode base 1 is a conductor, and the electrode fixing disk 2 is an insulator. The electrode arm assembly includes at least four twisted electrode arms 3. Each twisted electrode arm 3 includes at least two sequentially connected electrode arc segments 301. The bottom of the twisted electrode arm 3 is fixed on the electrode fixing disk 2, and the arc center point positions of at least two of the electrode arc segments 301 are different. The twisted electrode arm 3 including at least two electrode arc segments 301 with different center point positions, due to its special shape, can ablate non-spherical tumor cell tissues, or can ablate tumor cell tissues with a non-spherical outer surface, thereby better protecting human tissues and improving the success rate of the operation.

[0034] Furthermore, the electrode fixing disk 2 is made of a ceramic material that is heat-resistant and insulating, such as PA66. The electrode base 1 itself is conductive, and the outer surface of the electrode base 1 has an insulating coating or insulating tube, such as a Teflon coating or a tetrafluoroethylene tube, to make its outer surface electrically insulating and have a self-lubricating function, aiming to reduce the resistance during the process of piercing into tissues. The twisted electrode arm 3 is made of nickel-titanium alloy with shape memory function and plated with copper. Before the operation, the twisted electrode arm 3 is retracted within the electrode base 1. During the operation, after the electrode base 1 extends into the human tissue, the electrode fixing disk 2 is slid forward relative to the electrode base 1 until the twisted electrode arm 3 unfolds into an umbrella shape. When the electrode works, a certain voltage is applied to the twisted electrode arm 3 and the electrode base 1 to ablate human tumor cells. After the tumor cells are eliminated, at this time, the electrode fixing disk 2 is pulled towards the human hand direction to make the twisted electrode arm 3 retract into the electrode base 1, and the needle is withdrawn. A voltage is continuously applied during the needle withdrawal process to inhibit bleeding in the needle track until the electrode base 1 is withdrawn from the human body and the voltage is no longer applied, and the operation is completed.

[0035] Furthermore, the twisted electrode arm 3 is solid or hollow, and different twisted electrode arms 3 may have the same or different diameters.

[0036] Furthermore, please refer to Figures 1 to 2 , the twisted electrode arm 3 is a single electrode arm, and the twisted electrode arm 3 is integrally made.

[0037] Furthermore, please refer to Figures 3 to 8 , the twisted electrode arm 3 is a multi-segment electrode arm. The multi-segment electrode arm includes at least two electrode arm segments 302 and an insulating sleeve 303 for connecting two adjacent electrode arm segments 302. Please refer to Figure 9As shown, both the electrode arm segment 302 and the insulating sleeve 303 are tubular structures. Two opposite electrode arm segments 302 are inserted and fixed on the same insulating sleeve 303. A power transmission line 304 with an insulating skin is electrically connected in the inner hole of each electrode arm segment 302. The twisted electrode arm 3 is designed as a segmented structure, and adjacent electrode arm segments 302 are inserted and fixed by the insulating sleeve 303. On the one hand, when it is difficult to integrally process the twisted electrode arm 3, the split connection method can facilitate processing and manufacturing. On the other hand, the electrode arm segments 302 of different segments apply the same or different voltages and frequencies during operation, enabling a single twisted electrode arm 3 to ablate tumor cell tissues of different shapes and also irregularly shaped tumor cell tissues.

[0038] Further, the bending shape and dimensions of the insulating sleeve 303 are adapted to the bending shape and dimensions of the two electrode arm segments 302 connected thereto. The wall thickness of the insulating sleeve 303 is greater than the wall thickness of the two electrode arm segments 302 connected thereto. Step surfaces are machined on the circumferences at both ends of the outer tube arm of the insulating sleeve 303, and the two electrode arm segments 302 connected thereto are respectively inserted and fixed on the step surfaces at both ends of the insulating sleeve 303. After the insulating sleeve 303 is connected and inserted and fixed with the electrode arm segments 302 connected thereto, the surface of the twisted electrode arm 3 is smooth and not easily damaged to human tissues, and the influence of the insulating sleeve 303 on the ablation range of the twisted electrode arm 3 is minimized.

[0039] Further, electrode mounting holes 21 are provided on the electrode fixing disk 2, and the bottom of the twisted electrode arm 3 is fixed in the electrode mounting holes 21.

[0040] Further, it further includes a base for the insulating sleeve 303. The base for the insulating sleeve 303 is vertically placed and is a tubular structure. The electrode base 1 is fixed on the top of the base for the insulating sleeve 303, and the base for the insulating sleeve 303 facilitates grasping during the operation.

[0041] Further, it further includes a pressure sensor. The pressure sensor is installed at the head of the electrode arm assembly to detect the pressure in the tumor cell ablation area.

[0042] Further, it further includes a temperature sensor. The temperature sensor is installed at the head of the electrode arm assembly to detect the temperature in the tumor cell ablation area.

[0043] Further, each twisted electrode arm 3 includes two, three, four, five or six electrode arm segments 302.

[0044] For the specific structure of the umbrella-shaped twisted electrode described in this application, the following is an example:

[0045] One embodiment is that the twisted electrode arm 3 includes two electrode arc segments 301 connected in sequence. Specifically, please refer to Figures 1 to 6 , in which one of the twisted electrode arms 3 includes a first electrode arc segment 305 that deflects 30° to the right and extends upward, and a second electrode arc segment 306 that is smoothly connected to the first electrode arc segment, extends backward, and has an included angle of 45° with the vertical plane and is in a semi-circular arc shape. Additionally, Figures 1 to 2 the twisted electrode arm 3 in Figures 3 to 4 is a single electrode arm, Figures 5 to 6 the twisted electrode arm 3 in

[0046] One embodiment is that the twisted electrode arm 3 includes four electrode arc segments 301 connected in sequence. Specifically, please refer to Figures 7 to 8 , in which one of the twisted electrode arms 3 includes a third electrode arc segment 307 that arches forward to the right and extends upward, a fourth electrode arc segment 308 that is concave downward and backward, a fifth electrode arc segment 309 that arches forward to the right, and a sixth electrode arc segment 310 that extends downward. Figures 7 to 8 the twisted electrode arm 3 in

[0047] Or, specifically, one of the twisted electrode arms 3 includes a seventh electrode arc segment that arches upward, an eighth electrode arc segment that is concave downward, a ninth electrode arc segment that arches upward, and a tenth electrode arc segment that extends downward, and the seventh electrode arc segment, the eighth electrode arc segment, the ninth electrode arc segment, and the tenth electrode arc segment are in the same vertical plane.

[0048] In summary, for the umbrella-shaped twisted electrode provided by the present invention, each electrode arm is designed as a twisted electrode arm 3, and the twisted electrode arm 3 can be integrally processed or segmented. Different voltages and frequencies can be applied to each segmented electrode arm segment 302 after segmentation, so that the umbrella-shaped twisted electrode can ablate non-hemispherical tumor cell tissues, thereby better protecting human tissues and improving the success rate of surgery.

[0049] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An umbrella-shaped twisted electrode, characterized in that, It includes an electrode base (1), an electrode fixing plate (2) and an electrode arm assembly. The electrode base (1) is placed vertically and is of a tubular structure. The electrode fixing plate (2) is slidably arranged inside the electrode base (1). The electrode base (1) is a conductor, and the electrode fixing plate (2) is an insulator. The electrode arm assembly includes at least four twisted electrode arms (3). Each twisted electrode arm (3) includes at least two electrode arc segments (301) connected in sequence. The bottom of the twisted electrode arm (3) is fixed on the electrode fixing plate (2), and the positions of the arc center points of at least two electrode arc segments (301) are different.

2. The umbrella-shaped twisted electrode according to claim 1, wherein The twisted electrode arm (3) is a single electrode arm.

3. The umbrella-shaped twisted electrode according to claim 1, wherein The twisted electrode arm (3) is a multi-segment electrode arm. The multi-segment electrode arm includes at least two electrode arm segments (302) and an insulating sleeve (303) for connecting two adjacent electrode arm segments (302). Both the electrode arm segment (302) and the insulating sleeve (303) are of a tubular structure. Two opposite electrode arm segments (302) are inserted and fixed on the same insulating sleeve (303). A power transmission line (304) with insulating skin is electrically connected in the inner hole of each electrode arm segment (302).

4. The umbrella-shaped twisted electrode according to claim 3, characterized in that, The bending shape and size of the insulating sleeve (303) are adapted to the bending shape and size of the two electrode arm segments (302) connected to it. The wall thickness of the insulating sleeve (303) is greater than the wall thickness of the two electrode arm segments (302) connected to it. Step surfaces are machined on the circumferences at both ends of the outer tube wall of the insulating sleeve (303), and the two electrode arm segments (302) connected to it are respectively inserted and fixed on the step surfaces at both ends of the insulating sleeve (303).

5. The umbrella-shaped twisted electrode according to claim 3, characterized in that, Each twisted electrode arm (3) includes two, three, four, five or six electrode arm segments (302).

6. The umbrella-shaped twisted electrode according to claim 1, 2 or 3, characterized in that The twisted electrode arm (3) includes two electrode arc segments (301) connected in sequence.

7. The umbrella-shaped twisted electrode according to claim 6, characterized in that, One of the twisted electrode arms (3) includes a first electrode arc segment (305) that deflects 30° to the right and extends upward, which is smoothly connected to a second electrode arc segment (306) that extends forward, has an angle of 45° with the vertical plane and is in a semi-circular arc shape.

8. The umbrella-shaped twisted electrode according to claim 1, 2 or 3, characterized in that, The twisted electrode arm (3) includes four electrode arc segments (301) connected in sequence.

9. The umbrella-shaped twisted electrode according to claim 8, wherein One of the twisted electrode arms (3) includes a third electrode arc segment (307) that arches rightward, forward and upward, a fourth electrode arc segment (308) that is concave downward and backward, a fifth electrode arc segment (309) that arches rightward and forward, and a sixth electrode arc segment (310) that extends downward.

10. The umbrella-shaped twisted electrode according to claim 8, characterized in that, One of the twisted electrode arms (3) includes a seventh electrode arc segment that arches upward, an eighth electrode arc segment that is concave downward, a ninth electrode arc segment that arches upward, and a tenth electrode arc segment that extends downward. The seventh electrode arc segment, the eighth electrode arc segment, the ninth electrode arc segment and the tenth electrode arc segment are in the same vertical plane.

Images