Percutaneous Radiofrequency Ablation of Pulmonary Metastases in the Patients with Colorectal Carcinoma under CT Guidance

Objective To explore the clinical effects and safety of treatment for colorectal cancer to pulmonary metastases with percutaneous multiple electrodes radiofrequency-2000 (RF-2000) under CT-guided.Methods 26 pulmonary metastatic tumors in 11 cases were treated with RF-2000. The following extents were observed: (1) blood pressure,pulse rate and oxygen saturation during the treatment;(2)the variety of the liver function,the lung function and renal function after treatment;(3) the variety of the volume and low dense shadow of tumors after treatment;(4)the survival rate for 5 years. Results (1) The blood pressure,pulse rate and oxygen saturation were not changed during the treatment;(2) the liver function,the lung function and renal function after treatment were also not changed;(3) the volume of tumors were increased one month after treatment,three months later,23 lesions of 26 tumors were disappeared,2 decreased to more than 80% and 1 to 50%~80% in volume,and the low dense shadow within the tumors appeared as Ⅰtype (less than 50%) in one,Ⅱtype (50%~80%) in 3 and Ⅲ type (more than 80%) in 22;(4)The survival rate for 5 years was 81.82%(9/11). Conclusion The clinical effects and safety of treatment of colorectal cancer to lung metastases with percutaneous radiofrequency-2000 (RF-2000) under CT-guided is excellent.