History of radiofrequency ablation needle development

The development of radiofrequency ablation has a long history, so the technology has been constantly improved and mature, and the efficacy is definite. The radiofrequency ablation needle has developed from the original unipole to multipole. The effective ablation range of unipole is small, and the effect on large tumors is poor. Therefore, the present cluster multipole needle has been developed. It has been proved that if a tumor of 7cm diameter is treated with a spherical lesion of 4cm diameter, 22 points are needed to completely cover the tumor (the practical operation is difficult). To destroy the foci with a 5cm diameter sphere, 12 spots are also required. In response, RITA, an American company, has developed a range of radiofrequency needles for tumors of different sizes. 

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