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Microwave ablation antenna based on spiral slit structure

A microwave ablation and helical technology, which is applied in microwave surgical instruments, parts of surgical instruments, medical science, etc., can solve the problems of burning tail effect, long groove length, small roundness, etc., and achieves small backward radiation and easy processing , high-strength effect

Active Publication Date: 2020-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the length of the slots currently opened is long and the spacing is large, which makes the energy radiation part of the ablation needle too long, and the ablation area produced by the gap radiation is ellipsoidal, with small roundness, and the tip energy of the antenna is less, which is prone to burn-out effect

Method used

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  • Microwave ablation antenna based on spiral slit structure
  • Microwave ablation antenna based on spiral slit structure
  • Microwave ablation antenna based on spiral slit structure

Examples

Experimental program
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Effect test

Embodiment

[0031] In this embodiment, a microwave ablation antenna with a planar structure in the 2.45 GHz frequency band is designed and manufactured by coaxial processing technology.

[0032] figure 1 It is a structural diagram of an embodiment of the present invention, mainly including an ablation needle 1 and a semi-rigid coaxial needle shaft 2; in this embodiment, the ablation needle 1 is in the shape of a cone as a whole, and the inside is a metal cone with a bottom diameter of 2 mm and a height of 1 mm , the outer layer is covered with an insulating medium layer 3, the material is Teflon, which has sufficient mechanical strength and puncture force, and can prevent adhesion and fall off at the same time, forming a cone with a bottom diameter of 2mm and a height of 2mm.

[0033] The inside of the semi-rigid coaxial needle bar 2 is an inner conductor 5 of cylindrical structure, and the outer layer is sequentially covered with a dielectric layer 4, an outer conductor 6 and an insulati...

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Abstract

The invention discloses a microwave ablation antenna based on a spiral gap structure. The microwave ablation antenna comprises a conical ablation needle head, and a semi-rigid coaxial needle rod; thefront end of the semi-rigid coaxial needle rod is connected with the tail end of the ablation needle head; an outer conductor behind the joint is provided with a plurality of optimizable spiral slitsfor radiation, and impedance matching and radiation are carried out without forming or forming a plurality of annular slits behind the spiral slits, so that energy is transmitted in the semi-rigid coaxial line and is efficiently radiated at the slits. According to the microwave ablation needle, microwave energy transmission consumption is low, energy is efficiently radiated at the spiral slits andmainly concentrated at the front end of the ablation antenna, backward radiation is effectively restrained, and therefore a novel structure is provided for minimally invasive or non-invasive microwave tumor treatment.

Description

technical field [0001] The invention relates to the field of microwave thermal ablation of tumors, in particular to a microwave ablation antenna based on a helical slit structure. Background technique [0002] With the development of tumor minimally invasive technology, the medical technology of microwave ablation has gradually been recognized and widely used in the field of clinical medicine. Microwave ablation is a kind of in situ ablation. In situ ablation treatment refers to the use of metal needles or electrodes to puncture the target tissue percutaneously under the guidance of imaging methods such as CT or ultrasound. Minimally invasive treatment for focal inactivation of target tissue. Microwave ablation has the advantages of large ablation range, few complications, and safety, and has become a routine treatment for malignant tumors. Microwave is a high-frequency electromagnetic wave, and the transmitted electromagnetic energy can be absorbed by human tissue, and th...

Claims

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Application Information

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IPC IPC(8): A61B18/18
CPCA61B18/1815A61B2018/1846A61B2018/1869A61B2018/00083A61B2018/00577A61B2018/1876
Inventor 陈海东林森车文荃薛泉
Owner SOUTH CHINA UNIV OF TECH
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