Coaxial biopsy radiofrequency ablation needle

Abstract

The utility model belongs to the technical field of tumor radiofrequency ablation, and particularly relates to a coaxial biopsy radiofrequency ablation needle which comprises a handle, a cavity is formed in the handle, the biopsy radiofrequency ablation needle further comprises an outer needle tube, and the right end of the outer needle tube penetrates through the cavity and is fixedly installed on the inner wall of the cavity; the insulating sleeve is fixedly installed on the inner wall of the outer needle tube, and a water inlet cavity and a water outlet cavity are formed in the insulating sleeve; the right end of the inner needle rod penetrates through the insulating sleeve and is in contact with the interior of the insulating sleeve; the inner needle rod and the outer needle tube are arranged to be coaxial, a coaxial needle does not need to be matched according to a radio frequency needle, operation matching time is shortened, ablation can be carried out only after one-step puncture is carried out in place, the radio frequency needle does not need to be matched after coaxial puncture, the risk of movement deviation in an operation is reduced, and operation safety is improved. And the risk caused by the discomfort of selecting and matching the coaxial needle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of radiofrequency ablation technology for tumors, and in particular to a coaxial biopsy radiofrequency ablation needle. Background Technology

[0002] Currently, before performing radiofrequency ablation surgery, it is necessary to perform a biopsy to analyze the patient's tissues and determine the extent and nature of the lesion. If radiofrequency ablation is suitable, a radiofrequency needle is inserted through the biopsy port to connect to the radiofrequency ablation device for the procedure.

[0003] In the above-mentioned operation, the coaxial needle and the radiofrequency needle are two different sales units, and doctors need to match the specifications based on experience. The gap between the coaxial needle and the radiofrequency needle can be too loose or too tight. When it is too loose, the biopsy needle is too thick, which will cause greater damage to the patient during the puncture. When it is too tight, it is easy to rub and damage the insulation layer of the radiofrequency needle, leading to safety accidents. Therefore, this application proposes a coaxial biopsy radiofrequency ablation needle to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where coaxial needles and radiofrequency needles are sold as two separate units, requiring doctors to match specifications based on experience. Furthermore, the gap between the coaxial and radiofrequency needles can be either too loose or too tight. If too loose, the biopsy needle is too coarse, causing significant damage to the patient during puncture; if too tight, it can easily damage the insulation layer of the radiofrequency needle, leading to safety accidents. Therefore, this invention proposes a coaxial biopsy radiofrequency ablation needle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A coaxial biopsy radiofrequency ablation needle includes a handle, the handle having an internal cavity, and the biopsy radiofrequency ablation needle further includes:

[0007] An outer needle tube, the right end of which penetrates the cavity and is fixedly installed on the inner wall of the cavity;

[0008] An insulating sleeve is fixedly installed on the inner wall of the outer needle tube, and the interior of the insulating sleeve is provided with an inlet chamber and an outlet chamber.

[0009] The inner needle rod has its right end penetrating through the insulating sleeve and contacting the inside of the insulating sleeve.

[0010] The water inlet pipe has its right end passing through the handle and extending into the interior of the cavity. The right end of the water inlet pipe also passes through the top of the outer needle tube and is connected to the water inlet cavity.

[0011] The water outlet pipe has its right end passing through the handle and extending into the interior of the cavity. The right end of the water outlet pipe also passes through the bottom of the outer needle tube and is connected to the water inlet cavity.

[0012] An electrical plug, the right end of which passes through the handle and extends into the interior of the cavity, and the right end of the electrical plug is connected to the outer needle tube.

[0013] In a preferred embodiment of this utility model, the right end of the inner needle rod is open, and the inner needle rod is hollow.

[0014] In a preferred embodiment of this invention, the left end of the inner needle rod is threadedly connected to the left end of the outer needle tube.

[0015] As a preferred embodiment of this utility model, inlet and outlet circulation ports are provided on the bottom inner wall of the inlet chamber and the top inner wall of the outlet chamber. Beneficial effects

[0016] 1. By setting the inner needle rod and outer needle tube to be coaxial, there is no need to select a coaxial needle according to the radiofrequency needle, which reduces the surgical selection time. Only one puncture is needed to perform ablation. There is no need to fit the radiofrequency needle after coaxial puncture, which reduces the risk of intraoperative displacement, increases the safety of the operation, and reduces the risk caused by discomfort from selecting a coaxial needle.

[0017] 2. The threaded connection between the inner needle rod and the outer needle tube facilitates the installation and fixation of the inner needle rod and the outer needle tube, improving installation stability and making it easy to disassemble and sample. Attached Figure Description

[0018] Figure 1 This is a main sectional view of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the insulating sleeve of this utility model;

[0020] Figure 3 This is a main sectional view of the insulating sleeve of this utility model.

[0021] In the diagram: 1. Inner needle rod; 2. Outer needle tube; 3. Handle; 4. Cavity; 5. Inlet pipe; 6. Outlet pipe; 7. Insulating sleeve; 8. Electrical plug; 9. Inlet chamber; 10. Outlet chamber; 11. Inlet and outlet water circulation port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0023] Reference Figures 1-3 A coaxial biopsy radiofrequency ablation needle includes a handle 3, the handle 3 having a cavity 4 inside, and the biopsy radiofrequency ablation needle further includes:

[0024] The outer needle tube 2 has its right end penetrating the cavity 4 and being fixedly installed on the inner wall of the cavity 4.

[0025] Insulating sleeve 7 is fixedly installed on the inner wall of outer needle tube 2. Insulating sleeve 7 has an inlet chamber 9 and an outlet chamber 10 respectively.

[0026] The inner needle rod 1 has its right end penetrating the insulating sleeve 7 and contacting the inside of the insulating sleeve 7.

[0027] Water inlet pipe 5, the right end of water inlet pipe 5 passes through handle 3 and extends into the interior of cavity 4, the right end of water inlet pipe 5 passes through the top of outer needle tube 2 and is connected to water inlet cavity 9;

[0028] The water outlet pipe 6 has its right end passing through the handle 3 and extending into the cavity 4. The right end of the water outlet pipe 6 passes through the bottom of the outer needle tube 2 and is connected to the water inlet cavity 9.

[0029] Electrical plug 8, the right end of which passes through handle 3 and extends into the cavity 4, and the right end of electrical plug 8 is connected to the outer needle tube 2.

[0030] With the above structure, by setting the inner needle rod 1 and the outer needle tube 2 as coaxial, there is no need to select a coaxial needle according to the radiofrequency needle, which reduces the surgical selection time. Only one puncture is needed to perform ablation. There is no need to fit the radiofrequency needle after coaxial puncture, which reduces the risk of intraoperative displacement, increases the safety of the operation, and reduces the risk caused by discomfort from selecting a coaxial needle.

[0031] As a preferred embodiment of this utility model, the right end of the inner needle rod 1 is open and the inner needle rod 1 is hollow. By providing an opening at the right end of the inner needle rod 1, it is convenient to store and sample.

[0032] As a preferred embodiment of this utility model, the left end of the inner needle rod 1 is threadedly connected to the left end of the outer needle tube 2. The threaded connection between the inner needle rod 1 and the outer needle tube 2 facilitates the installation and fixation of the inner needle rod 1 and the outer needle tube 2, improves installation stability, and facilitates disassembly and sampling.

[0033] As a preferred embodiment of this utility model, water circulation ports 11 are provided on the bottom inner wall of the water inlet chamber 9 and the top inner wall of the water outlet chamber 10. By providing water circulation ports 11, water circulation inside the insulating sleeve 7 can be realized.

[0034] The working principle of this utility model is as follows: In use, firstly, the right end of the inner needle rod 1 is threaded through the insulating sleeve 7 and connected to the left end of the outer needle tube 2. Then, the operator holds the handle 3 and inserts the right end of the outer needle tube 2 into the patient's body, allowing the right end of the inner needle rod 1 to be inserted into the lesion. The lesion is then stored through the opening at the right end of the inner needle rod 1, enabling biopsy sampling. Simultaneously, the electrical plug 8 is connected to the radio frequency generator. This connection allows for the detection of the temperature of the outer needle tube 2, enabling timely temperature adjustment to prevent excessively high or low temperatures. The device can heat the outer needle tube 2 to ablate the lesion, achieving radiofrequency ablation. In addition, during use, the inlet pipe 5 and outlet pipe 6 are connected to the water storage device. Water is supplied to the inlet chamber 9 inside the insulating sleeve 7 through the inlet pipe 5, and flows back to the outlet chamber 10 through the inlet and outlet circulation ports 11. The water can then be recycled through the outlet pipe 6. This method can achieve temperature regulation of the outer needle tube 2, so that the temperature of the outer needle tube 2 can ablate the lesion without burning other body tissues of the patient, thus achieving overheat protection.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coaxial biopsy radiofrequency ablation needle, comprising a handle (3), wherein the handle (3) has a cavity (4) inside, characterized in that, The biopsy radiofrequency ablation needle also includes: The outer needle tube (2) has its right end penetrating the cavity (4) and fixedly installed on the inner wall of the cavity (4); Insulating sleeve (7), the insulating sleeve (7) is fixedly installed on the inner wall of the outer needle tube (2), and the inner wall of the insulating sleeve (7) is provided with an inlet chamber (9) and an outlet chamber (10). The inner needle rod (1) has its right end penetrating through the insulating sleeve (7) and contacting the interior of the insulating sleeve (7); Water inlet pipe (5), the right end of which passes through the handle (3) and extends into the cavity (4), the right end of which passes through the top of the outer needle tube (2) and is connected to the water inlet cavity (9); Water outlet pipe (6), the right end of which passes through the handle (3) and extends into the cavity (4), the right end of which passes through the bottom of the outer needle tube (2) and is connected to the water inlet cavity (9); An electrical plug (8) has its right end passing through the handle (3) and extending into the cavity (4). The right end of the electrical plug (8) is connected to the outer needle tube (2).

2. The coaxial biopsy radiofrequency ablation needle according to claim 1, characterized in that, The right end of the inner needle rod (1) is open, and the inner needle rod (1) is hollow.

3. The coaxial biopsy radiofrequency ablation needle according to claim 1, characterized in that, The left end of the inner needle rod (1) is threadedly connected to the left end of the outer needle tube (2).

4. The coaxial biopsy radiofrequency ablation needle according to claim 1, characterized in that, The bottom inner wall of the water inlet chamber (9) and the top inner wall of the water outlet chamber (10) are provided with water circulation ports (11).

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