Microwave radiating antenna of direct puncture for treating tumour

Abstract

The present invention relates to a microwave radiation antenna capable of making percutaneous puncture to cure tumor of several regions of human body. Said invention is formed from antenna connector, hard coaxial line, ceramic tube, water inlet tube, water outlet tube, temperature-measuring system, stainless steel sleeve and handle. Its output power can be up to above 100w, and is therapeutic effect is reliable and safe.

Description

technical field [0001] The invention relates to the technical field of medical devices, and relates to a microwave radiation antenna for treating tumors in various parts of a human body and capable of direct percutaneous puncture. Background technique [0002] Microwave is a high-frequency electromagnetic wave with high efficiency, fast, uniform heating, thorough thermal coagulation, convenient use and safety for tumor tissue, and has been widely used in clinical practice. Microwave radiation antennas are used for percutaneous puncture to treat diseases such as tumors. When using antennas to insert into tissues and organs, it is hoped that the antennas should be as thin as possible, so that the damage to blood vessels, nerves and other tissues in the puncture path can be minimized during puncture. It is hoped that the thermal coagulation range of the radiation end of the antenna in the tissue can be as large as possible according to the needs, so that large tumors can be tre...

AI Technical Summary

Problems solved by technology

However, the current puncture therapy antennas used at home and abroad have two shortcomings. One is that the plastic insulation layer at the antenna radiation end and the inner conductor copper wire are all soft materials, which cannot be directly punctured. The guide needle is penetrated into the tumor, and then the needle core is removed and the radiating antenna is inserted

This not only increases the puncture diameter and increases tissue trauma, but also causes bleeding or even massive bleeding in the puncture needle shell when the puncture needle core is pulled out. Moreover, if the positioning is not accurate and needs to be punctured again or even repeated punctures, the tissue damage will be greater , increasing surgical risk and patient suffering

The second is that the thermal coagulation range of the currently used antenna is small, and it can only treat small tumors. The reason is that the coaxial line itself

Practice has proved that when the diameter of the coaxial line reaches 5-6mm, the microwave power transmitted by the coaxial line can reach 80-100W. 4-5cm, which is obviously what clinicians at home and abroad have been looking forward to for many years, but if an antenna made of a coaxial cable as thick as chopsticks is used for clinical puncture, it will inevitably damage blood vessels, nerves or other organs in the puncture path. Severe damage to the tissue will increase the chance of hemorrhage of the tissue and organ, thus increasing the complexity and risk of the operation

At present, it is still impossible to effectively carry out microwave thermal coagulation therapy for tumors larger than 2cm at home and abroad. The reason is that when the diameter of the antenna is larger than 2mm, percutaneous puncture of the liver (for liver cancer), lung (for lung cancer), and spleen (for hypersplenism) Large tissue damage, heavy bleeding, high surgical risk, clinically unacceptable

However, when the diameter of the antenna is less than 2 mm, the microwave power transmitted by the antenna is small, and the range of the thermally coagulated tumor is small, so the effective therapeutic effect cannot be achieved, and the puncture operation is troublesome and unsafe

This is a major problem that hinders the application of microwave technology in puncture treatment of tumors today.

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