tumor, pneumothorax
TUMOR, PNEUMOTHORAX, CAVITY, COLD, COMPLICATIONS
The ablation procedure is performed using the RITA System. The choice of RFA needle type is based on the tumor size and morphology, which may include, but is not limited to, the Olympus RFA needle, etc. After routine disinfection, towel placement, and local anesthesia, a guide needle is inserted to puncture the liver parenchyma around the tumor in the liver. The puncture path and distance are determined, and a computed tomography (CT) scan is used to confirm the safe and accurate path. Once the CT scan confirms the safety of the ablation path and range, the ablation treatment begins. The number of ablation needles and duration of the procedure are determined by the investigator based on the specific condition. At the end of the procedure, the ablation puncture needle tract is routinely ablated, and the treatment needle is removed. Dressing is applied after the procedure. Repeat CT scans are performed to ensure that no complications such as pneumothorax have occurred.The number of electrodes used for RFA procedures, whether it is a single electrode or multiple electrodes with overlapping ablations, is determined by the size of the tumor being treated. RFA is performed while the patient is under local anesthesia with intravenous analgesia or monitored anesthesia care. During the procedure, the output power starts at 50 W and is incrementally increased up to 200 W, with the power maintained until the impedance reaches its maximum value. To keep the temperature at the tip below 20°C, cold saline is injected into the electrode cavity using a pump. The RFA procedure is then carried out until the target lesion, identified by ultrasound or CT scan, including the entire tumor and border areas larger than 5 mm in size, has been treated. After completing the RFA procedure, an immediate contrast‐enhanced dynamic liver CT scan is performed, and a radiologist carefully reviews the results to assess technical success and identify any procedure‐related complications. In cases where the level of ablation is found to be insufficient, the RFA procedure is repeated during the same hospitalization.