Discontinuous moving shot technique for conformal thermal ablation in an ex vivo porcine liver model

Discontinuous moving shot technique for conformal thermal ablation in an ex vivo porcine liver model

Blog Article

PURPOSEWe aimed to determine the ablation characteristics of discontinuous moving shot technique (DMST) in microwave ablation (MWA), radiofrequency ablation (RFA) and laser ablation (LA), and analyze the differences compared with fixed electrode technique (FET) in an ex vivo porcine liver model.METHODSFET was defined as the ablation needle remaining fixed during ablation.In DMST, ablation needle moved backward for a fixed distance twice along the long axis during ablation.Four here moving distances (0.5 cm, 0.

75 cm, 1 cm and 2 cm) were used in DMST.Long-axis diameter (LAD) and short-axis diameter (SAD) of ablation zones were measured.The ratio of LAD/SAD was calculated.RESULTSThe shape and size of ablation zones were different between DMST and FET.Compared with FET, DMST could achieve greater LAD when the moving distance became long enough.

In MWA with DMST, SAD decreased with 730 sunken lake road the extension of moving distance and finally became smaller than the SAD in FET.While in LA and RFA, the change of moving distance did not affect SAD significantly.CONCLUSIONIn MWA, RFA and LA, the characteristics of ablation zone of DMST were different from that of FET.This unique ablation technique may be suitable for conformal thermal ablation.