High-performance water-cooled microwave ablation antenna

Abstract

The invention discloses a high-performance water-cooled microwave ablation antenna, comprising a radiation head, a medium pipe, a semi-rigid coaxial electric cable, a needle rod, and a metal outer guide bush sleeved on the tail part of the medium pipe, wherein the semi-rigid coaxial electric cable penetrates through the axis hole of the metal outer guide bush and then is connected with the radiation head, the front end of the metal outer guide bush is sleeved on the medium pipe, the front end of the needle rod is sleeved on the excircle of the tail part of the outer guide bush, and the outer guide bush is in ohmic contact with the outer conductor of the semi-rigid coaxial electric cable and the needle rod. According to the high-performance water-cooled microwave ablation antenna disclosed by the invention, the needle rod and the medium pipe are connected together through the metal outer guide bush, the outer guide bush is in ohmic contact with the outer conductor of the semi-rigid coaxial electric cable and the needle rod, so that the structure precision of the microwave ablation antenna is improved, the boundary condition of the spatial electromagnetic field source of the antenna is not instable and unknown any more, and therefore, the performance and the main property parameters of the ablation antenna tend to be consistent and have certainty, so that the stability, efficiency and reliability of the ablation antenna are further improved.

Description

technical field [0001] The invention relates to a medical device for microwave ablation of tumors, belonging to the technical field of medical microwaves. Background technique [0002] Since the beginning of the 21st century, microwave ablation of tumors has rapidly developed into a major means of clinical tumor treatment. It can inactivate tumors in situ under the guidance of modern images such as B-ultrasound or CT, and has minimally invasive, precise, Notable features of high efficiency, no toxicity and little side effects. Microwave ablation is playing an increasingly important role in the treatment of solid tumors, especially for larger solid tumors, due to its outstanding advantages such as fast heating speed, high intratumoral temperature, large ablation range, and little influence from carbonization and blood flow. The popularity rate of clinical application is also increasing. [0003] With the continuous popularization of microwave ablation of tumors, clinical me...

AI Technical Summary

Problems solved by technology

At present, in the existing microwave ablation surgical instruments, some defects and deficiencies in product performance and quality have been exposed:

Therefore, when the structural design and manufacturing process of the front end of the microwave ablation antenna ignore the above-mentioned precise details, ignore the possible variable factors, or do not consider carefully, the performance of the ablation antenna will be unstable, causing its space The uncertainty of the electromagnetic field strength makes the electromagnetic field distribution parameters at the front end inconsistent, which will inevitably lead to inconsistent microwave ablation lesions (thermal effect range), that is, the shape and volume of the ablated tumor are inconsistent, and there will be large differences

Images