ANALYSY HEAT PROPAGATION TIME OF BASE UNTIL TIP OF TROCARTES USING FINITE MODELS ELEMENTS

Abstract

The purpose of the hepatic RF ablation is to use the heat to destroy cancer cells to avoid the liver metastases. This mini-invasive techniques uses an electrode with multiple lengthening inserted into the tumor region and the radio frequency (RF) is produced by an electronic generator. The heat generated in the tumor causing their necrosis, i.e. the cells are destroyed due to increased temperature. Thus the procedure, when successful, allows controlled heating in a well-defined volume of the tumor in the liver to eliminate completely carcinoma. Therefore, the radiofrequency ablation (RFA) can cure the patient of the cancer. The geometric characteristics: diameter, length of the electrode and a position are described in the following table. Basically, it was constructed two catheters, one of 3.5 mm and other of 4.0 mm of diameter, which contains eight electrodes umbrella format. Moreover, each catheter electrode vary in length and hollow and in the solid structure. Soon the analysis is done with two catheter 3.5mm and 4mm, each with arc length of electrodes 10, 15, 20 and 25 mm, hollow and solid structure. The model shows the system mechanical effect on the fabric with the temperature rise with time around the electrode.