Table 2.
Measured values of the dimensions of coagulation necrosis according to radiofrequency (RF) power application modes
| Coagulation necrosis | Group A Consecutive mode RFA (n = 20) |
Group B Switching monopolar RFA (n = 20) |
Group C Switching bipolar RFA (n = 20) |
p-valuea | p-value A vs B | p-value A vs C | p-value B vs C |
|---|---|---|---|---|---|---|---|
| Dmin (cm) | 3.9 ± 1.2 | 4.4 ± 1.0 | 5.1 ± 0.9 | 0.002 | 0.469 | 0.004 | 0.175 |
| Dmax (cm) | 5.8 ± 0.6 | 5.5 ± 0.8 | 5.9 ± 0.7 | 0.382 | 0.679 | 1.000 | 0.356 |
| Dv (cm) | 4.6 ± 0.2 | 5.3 ± 0.4 | 5.5 ± 0.28 | 0.963 | 1.000 | 1.000 | 1.000 |
| Area (cm2) | 21.2 ± 4.3 | 21.8 ± 5.3 | 25.1 ± 5.5 | 0.040 | 1.000 | 0.047 | 0.131 |
| Effective volume (cm3) | 39.0 ± 27.7 | 50.2 ± 27.8 | 72.8 ± 36.4 | 0.004 | 0.768 | 0.003 | 0.073 |
Dmax, maximum diameter of the ablation zone; Dmin, minimum diameter of the ablation zone; Dv, vertical diameter of the ablation zone; RFA, radiofrequency ablation.
Values are mean ± standard deviation.
a
p-values indicate the statistical difference among Groups A–C.