| Theme |
Controversies Over Diagnosis and Treatment of Hepatocellular Carcinoma |
| Title |
The Differences Between Expandable Type and Cool-tip Type in Radiofrequency Ablation |
| Author |
Norio Isoda |
Division of Gastroenterology, Department of Internal Medicine, Jichi Medical School |
| Author |
Kenichi Ido |
Department of Endoscopy, Jichi Medical School |
| Author |
Masanori Hozumi |
Department of Endoscopy, Jichi Medical School |
| Author |
Yoshiaki Sato |
Division of Gastroenterology, Department of Internal Medicine, Jichi Medical School |
| Author |
Yasuhiro Onobuchi |
Division of Gastroenterology, Department of Internal Medicine, Jichi Medical School |
| Author |
Kentaro Sugano |
Division of Gastroenterology, Department of Internal Medicine, Jichi Medical School |
| [ Summary ] |
There are two types of ablation tools, the expandable type and the cool-tip type, which are both known as radiofrequency ablation (RFA) types. In this paper, the features of each type of RFA equipment were explained, and the ablation area of the two types was reported on using information gathered from experiments on bovine livers. The shape of the ablation formed by the Expandable type (RITA) was of an irregular shape and that formed by the Cool-tip type was oval in shape. The methods for RFA treatment for hepatocellular carcinoma (HCC) were the percutaneous and endoscopic types. As for the percutaneous approach, the multiple puncture method may increase the safety margin, and percutaneous methods with TAE or the balloon catheter method may enlarge the coagulated area. In our department, we performed laparoscopic radiofrequency ablation for HCCs under general anesthesia, so that the local recurrence rate of HCC was very low. |