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Magnetism compatible water-cooling microwave ablation needle and preparation method thereof

A microwave ablation and magnetic compatibility technology, applied in the field of medical devices, can solve the problems of limiting the development of microwave tumor ablation, human injury, and inability to use

Pending Publication Date: 2018-03-06
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, currently available microwave ablation needles are limited by material technology and cannot be used in a magnetic resonance environment, which limits the development of microwave tumor ablation
More importantly, the ablation area obtained by the currently available microwave ablation needle is a long ellipsoid shape, and most tumors are close to a spherical shape. In order to completely inactivate tumor tissue, the ablation range must be enlarged. This will definitely damage the normal tissues of the human body and cause unnecessary harm to the human body.

Method used

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  • Magnetism compatible water-cooling microwave ablation needle and preparation method thereof
  • Magnetism compatible water-cooling microwave ablation needle and preparation method thereof
  • Magnetism compatible water-cooling microwave ablation needle and preparation method thereof

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preparation example Construction

[0065] The present invention also provides a method for preparing the magnetically compatible water-cooled microwave ablation needle, comprising the following steps:

[0066] A) Connect the inner conductor and the outer conductor at the front end of the coaxial cable (2) by welding; specifically, peel off the outer conductor and the intermediate insulating layer at the front end of the coaxial cable (2), and weld the inner conductor and the outer conductor to connect.

[0067] B) On the surface of the coaxial cable (2), cut 8 to 10 annular notches communicated with the insulating medium and distributed at equal intervals from the position of the front end of the coaxial cable (2) along its axial direction;

[0068] In the present invention, the cutting method is preferably wire cutting technology.

[0069] C) Insert the non-magnetic metal ring (3) into the surface of the coaxial cable, and use an adhesive to fix the non-magnetic metal ring (3) on the side farthest from the not...

Embodiment 1

[0078] This embodiment provides a magnetically compatible water-cooled microwave ablation needle, including: a zirconia needle tube 1 , a coaxial cable 2 , a copper ring 3 , a water inlet tube 4 , a water outlet tube 5 , a radio frequency coaxial connector 6 and a needle handle 7 .

[0079] Specifically include:

[0080] A zirconia needle tube (1), the zirconia needle tube comprising a needle point and a hollow needle body;

[0081] A coaxial cable (2), the coaxial cable (2) includes an inner conductor, an insulating medium and an outer conductor, the inner conductor and the outer conductor at the front end of the coaxial cable (2) are connected and arranged on the hollow needle Inside the body, the surface of the coaxial cable is provided with 8 to 10 annular notches communicated with the insulating medium and distributed at equal intervals from the front end of the coaxial cable along its axial direction;

[0082]The non-magnetic metal ring (3) arranged inside the hollow ne...

Embodiment 2

[0095] This embodiment provides a magnetically compatible water-cooled microwave ablation needle, including: a zirconia needle tube 1 , a coaxial cable 2 , a copper ring 3 , a water inlet tube 4 , a water outlet tube 5 , a radio frequency coaxial connector 6 and a needle handle 7 .

[0096] Specifically include:

[0097] A zirconia needle tube (1), the zirconia needle tube comprising a needle point and a hollow needle body;

[0098] A coaxial cable (2), the coaxial cable (2) includes an inner conductor, an insulating medium and an outer conductor, the inner conductor and the outer conductor at the front end of the coaxial cable (2) are connected and arranged on the hollow needle Inside the body, the surface of the coaxial cable is provided with 8 to 10 annular notches communicated with the insulating medium and distributed at equal intervals from the front end of the coaxial cable along its axial direction;

[0099] The non-magnetic metal ring (3) arranged inside the hollow n...

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Abstract

The invention provides a microwave ablation needle. All parts of the microwave ablation needle are made from non-magnetic materials, which can be safely used for a microwave tumor ablation technique guided by nuclear magnetic resonance imaging. The microwave ablation needle is without ionizing radiation to human body, high in image resolution, capable of imaging at any orientations, and capable ofimproving success rate of surgeries. By adopting the design of the combination of multiple rabbets of coaxial-cable and a nonmagnetic metal ring, the problem of afterheat on a needle rod tail duringheating process of the existing microwave ablation needle is eliminated, the ablation area is of almost a spherical shape which is in accordance with a majority of tumour shapes; meanwhile, accordingto different tumour shapes, the number of the rabbets, the width of the rabbets and the intervals between the rabbets can be adjusted, different ablation shapes can be obtained, and ablation efficiency can be effectively improved under the condition of without damaging normal tissues.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a magnetically compatible water-cooled microwave ablation needle and a preparation method thereof. Background technique [0002] At present, minimally invasive microwave tumor ablation has been widely used clinically. Microwave tumor ablation is to insert a microwave ablation needle into a human tissue lesion under the guidance of an image, and the microwave energy generated by the microwave ablation device is transmitted to the front end of the microwave ablation needle for continuous emission, causing tissue friction to generate heat, forming a spherical heat within a few minutes. In the field, the central temperature is higher than 100°C, and the edge temperature is higher than 60°C, which causes tissue coagulation, dehydration and necrosis. Microwave tumor ablation has high efficiency, less trauma, and can control the depth and range of tissue effects. ...

Claims

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Application Information

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IPC IPC(8): A61B18/18
CPCA61B18/1815A61B2018/00589A61B2018/00059A61B2018/00011A61B2018/00964A61B2018/1869
Inventor 黄晓燕周玉福葛梦柯邱本胜
Owner UNIV OF SCI & TECH OF CHINA
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