Radiofrequency ablation electrode needle in crimping connection

Abstract

The utility model discloses a radiofrequency ablation electrode needle connected in a crimping mode, which comprises a needle tip, a connecting tube body part and a connecting tube body part, the insulating stepped tube is arranged on the connecting tube body part in a sleeving manner, one end of the insulating stepped tube is provided with a first tube body section, and the diameter of the first tube body section is larger than that of the insulating stepped tube; the core shaft is inserted into the connecting pipe body part, and the core shaft and the connecting pipe body part are fixed in a confining pressure compression joint mode; the outer tube is sleeved on the insulating stepped tube, and the outer tube and the insulating stepped tube are fixed in a confining pressure crimping manner; and the end part of the cable is in contact with the core shaft, a crimping pipe is sleeved on the overlapped part of the cable and the core shaft, and the crimping pipe is fixed in a confining pressure crimping manner. Compared with the prior art, the radiofrequency ablation electrode solves the problem that an existing radiofrequency ablation electrode is large in structure forming difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency ablation, in particular to a radio frequency ablation electrode needle with crimping connection. Background Art

[0002] The water cooling device in the needle-shaped radiofrequency ablation electrode is one of the key components of the needle-shaped radiofrequency ablation electrode. Its function is to ensure that low-temperature cooling water circulates inside the needle-shaped radiofrequency ablation electrode so that the target tissue around the ablation electrode needle is cooled. For example, Chinese Patent 202211350381.7 discloses a radiofrequency ablation electrode, which relates to the field of medical device technology and mainly includes an internal circulation structure and an external perfusion structure; the internal circulation structure enables the cold medium in the liquid supply device to reach the working end of the radiofrequency ablation electrode to cool the working end of the radiofrequency ablation electrode and the surrounding lesion tissue, and enables the cold medium to flow back to the liquid supply device; the external perfusion structure enables the cold medium to reach the lesion tissue through the micropores on the working end of the radiofrequency ablation electrode. The utility model also discloses a radiofrequency ablation system including the above-mentioned radiofrequency ablation electrode, and the use of the above-mentioned radiofrequency ablation electrode in the preparation of medical devices.

[0003] During the assembly process of the existing radiofrequency ablation electrode structure, the needle tip is laser welded to the inner tube, the inner tube is soldered to the cable, the inner tube and the outer tube are isolated by a double layer of insulating material, and fixed to the handle by glue, which makes the structure difficult to form. Utility Model Content

[0004] The utility model aims to provide a radio frequency ablation electrode needle with a crimping connection, so as to solve the problem that the structure of the existing radio frequency ablation electrode is difficult to form.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a radiofrequency ablation electrode needle with crimping connection, comprising:

[0006] The needle tip has a connecting tube body portion disposed on the back thereof;

[0007] An insulating step tube, which is sleeved on the connecting tube body, and a first tube body section is provided at one end of the insulating step tube, and the diameter of the first tube body section is larger than the diameter of the insulating step tube;

[0008] The mandrel is inserted into the connecting pipe body, and the mandrel and the connecting pipe body are fixed by crimping;

[0009] The outer tube is sleeved on the insulating step tube, and the outer tube and the insulating step tube are crimped and fixed;

[0010] The end of the cable contacts the core shaft, and a crimping tube is sleeved on the overlapping part of the cable and the core shaft, and the crimping tube is crimped and fixed.

[0011] As a further description of the above technical solution:

[0012] The crimping tube includes an inner crimping tube body and an outer crimping tube body. A first bending portion is provided at one end of the core shaft, and a second bending portion is provided at one end of the cable. The inner crimping tube body is sleeved on the outside of the first bending portion and the second bending portion, and the inner crimping tube body is crimped and fixed. The outer crimping tube body is sleeved on the outside of the core shaft and the cable, and the outer crimping tube body is crimped and fixed.

[0013] As a further description of the above technical solution:

[0014] The length of the outer pressure-connecting tube body is greater than the length of the inner pressure-connecting tube body.

[0015] As a further description of the above technical solution:

[0016] The needle tip is provided with a curved cutting edge.

[0017] As a further description of the above technical solution:

[0018] A straight line cutting edge is arranged on the needle tip.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. In the utility model, the stainless steel mandrel is connected with the special-shaped needle tip and the cable by means of confining pressure crimping, which has reliable connection performance, does not require laser welding or soldering, and reduces the difficulty of structural forming.

[0021] 2. In the present invention, the insulating step tube forms reliable insulation between the needle tip and the outer tube, so that the ablation energy is concentrated on the needle tip, and local soft tissue can be ablated quickly.

[0022] 3. In the present invention, the special-shaped needle tip can lift up the soft tissue, allowing the user to observe the tissue ablation effect in real time, facilitating local rapid ablation and observation, and improving the efficiency of radiofrequency ablation.

[0023] 4. In the utility model, the core shaft and the cable are crimped together by an inner crimping tube body and an outer crimping tube body to achieve inner and outer crimping. The double-layer confining pressure improves the connection force between the cable and the core shaft, avoiding problems such as loosening and poor contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The figure is a schematic diagram of the structure of a radiofrequency ablation electrode needle with crimping connection.

[0026] Figure 2 A cross-sectional view of a radiofrequency ablation electrode needle with a crimp connection.

[0027] Figure 3 The present invention is a schematic diagram of the installation of an insulating step tube in a radiofrequency ablation electrode needle with a crimping connection.

[0028] Figure 4 Schematic diagram of the crimping of the cable and the mandrel in a radiofrequency ablation electrode needle with crimping connection Figure 1 .

[0029] Figure 5 Schematic diagram of the crimping of the cable and the mandrel in a radiofrequency ablation electrode needle with crimping connection Figure 2 .

[0030] Figure 6 This is a schematic diagram of the structure of a first embodiment of a crimp-connected radiofrequency ablation electrode needle needle tip.

[0031] Figure 7 This is a schematic diagram of the structure of the second needle tip scheme in a radiofrequency ablation electrode needle with a crimped connection.

[0032] Legend:

[0033] 1. Needle tip; 11. Connecting tube body; 12. Arc edge; 13. Straight edge; 2. Insulated step tube; 21. First tube body section; 3. Mandrel; 31. First bending portion; 4. Outer tube; 5. Cable; 51. Second bending portion; 6. Inner compression tube body; 7. Outer compression tube body. DETAILED DESCRIPTION

[0034] 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 clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, 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.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1-5 The utility model provides a technical solution: a radiofrequency ablation electrode needle with crimping connection, comprising:

[0038] The needle tip 1 has a connecting tube portion 11 disposed on its back;

[0039] The insulating step tube 2 is sleeved on the connecting tube body 11, and a first tube body section 21 is provided at one end of the insulating step tube 2. The diameter of the first tube body section 21 is larger than the diameter of the insulating step tube 2;

[0040] The core shaft 3 is inserted into the connecting pipe body 1, and the core shaft 3 and the connecting pipe body 1 are crimped and fixed;

[0041] The outer tube 4 is sleeved on the insulating step tube 2, and the outer tube 4 and the insulating step tube 2 are crimped and fixed;

[0042] The end of the cable 5 contacts the core shaft 3 , and a crimping tube is sleeved on the overlapping portion of the cable 5 and the core shaft 3 , and the crimping tube is crimped and fixed.

[0043] The crimping tube includes an inner crimping tube body 6 and an outer crimping tube body 7. A first bending portion 31 is provided at one end of the core shaft 3, and a second bending portion 51 is provided at one end of the cable 5. The inner crimping tube body 6 is sleeved on the outside of the first bending portion 31 and the second bending portion 51, and the inner crimping tube body 6 is crimped and fixed. The outer crimping tube body 7 is sleeved on the outside of the core shaft 3 and the cable 5, and the outer crimping tube body 7 is crimped and fixed.

[0044] When the core shaft 3 and the cable 5 are connected, the circular tube-shaped inner compression tube body 6 is mounted on the overlapped part of the core shaft 3 and the cable 5, and the inner compression tube body 6 is crimped by confining and pressing for the first time, and then the inner compression tube body 6 is rotated 180 degrees, and the circular tube-shaped outer compression tube body 7 is mounted on the outside, and the outer compression tube body 7 is crimped by confining and pressing for the second time. The core shaft 3 and the cable 5 are crimped by the inner compression tube body 6 and the outer compression tube body 7, and the double-layer confining and pressing improves the connection force between the cable and the core shaft 3, avoiding problems such as loosening and poor contact.

[0045] The length of the outer compression tube body 7 is greater than that of the inner compression tube body 6 , which protects the bending parts of the core shaft 3 and the cable 5 , and can further compress the outer compression tube body 7 to deform, thereby improving the connection force between the cable and the core shaft 3 .

[0046] The outer tube 4 is a stainless steel tube, and the core shaft 3 is a stainless steel core shaft, which is convenient for fixing the outer tube 4 and the insulating step tube 2, and the core shaft 3 and the connecting tube body 11 by a confining pressure crimping method.

[0047] Working principle: The stainless steel core shaft 3 is connected to the special-shaped needle tip 1 and the cable 5 by confining pressure crimping, which has reliable connection performance and does not require laser welding or soldering, reducing the difficulty of structural forming. The insulating step tube 2 forms reliable insulation between the needle tip 1 and the outer tube 4, so that the ablation energy is concentrated on the needle tip 1, which can quickly ablate local soft tissue. The special-shaped needle tip 1 can lift the soft tissue, allowing the user to observe the tissue ablation effect in real time, facilitating local rapid ablation and observation, and improving the efficiency of radiofrequency ablation.

[0048] Example 2

[0049] See attached Figure 6 , the rest is the same as the embodiment 1, except that: the needle tip 1 is provided with a curved edge 12. The curved edge 12 is a cutting edge composed of multiple curved surfaces on the needle tip 1, forming the shape of a special-shaped needle tip, the purpose of which is to be able to stir up soft tissue for local rapid ablation and observation.

[0050] Example 3

[0051] See attached Figure 7 , the rest is the same as the embodiment 1, except that: a straight surface cutting edge 13 is provided on the needle tip 1. The straight surface cutting edge 13 is composed of a straight surface connected by multiple straight lines on the needle tip 1, forming the shape of the special-shaped needle tip, the purpose of which is to be able to stir up soft tissue for local rapid ablation and observation.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A radiofrequency ablation electrode needle with crimping connection, characterized in that: include: The needle tip has a connecting tube body portion disposed on the back thereof; An insulating step tube, which is sleeved on the connecting tube body, wherein a first tube body section is provided at one end of the insulating step tube, and a diameter of the first tube body section is greater than a diameter of the insulating step tube; A core shaft is inserted into the connecting pipe body, and the core shaft is fixedly pressed and connected with the connecting pipe body; An outer tube, which is sleeved on the insulating step tube, and the outer tube and the insulating step tube are crimped and fixed; The end of the cable contacts the core shaft, the overlapping part of the cable and the core shaft is sleeved with a crimping tube, and the crimping tube is crimped and fixed.

2. The radiofrequency ablation electrode needle with crimping connection according to claim 1, characterized in that: The crimping tube includes an inner crimping tube body and an outer crimping tube body, a first bending portion is provided at one end of the core shaft, and a second bending portion is provided at one end of the cable, the inner crimping tube body is sleeved on the outside of the first bending portion and the second bending portion, and the inner crimping tube body is crimped and fixed, and the outer crimping tube body is sleeved on the outside of the core shaft and the cable, and the outer crimping tube body is crimped and fixed.

3. The radiofrequency ablation electrode needle with crimping connection according to claim 2, characterized in that: The length of the external pressure-connecting pipe body is greater than the length of the internal pressure-connecting pipe body.

4. The radiofrequency ablation electrode needle with crimping connection according to claim 1, characterized in that: The needle tip is provided with a curved cutting edge.

5. The radiofrequency ablation electrode needle with crimping connection according to claim 1, characterized in that: The needle tip is provided with a straight line cutting edge.

6. The radiofrequency ablation electrode needle with crimping connection according to claim 1, characterized in that: The outer tube is a stainless steel tube.

7. The radiofrequency ablation electrode needle with crimping connection according to claim 1, characterized in that: The mandrel is a stainless steel mandrel.

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