Table 2.
Performance parameters of the four RFA systems for 3 cm target ablation volume
| Cool-Tip | 1500X RF | RF 3000 | CelonPower LAB | |
|---|---|---|---|---|
| Manufacturer | Radionics | AngioDynamics | Boston Scientific | Celon |
| x-axisa (cm) | 4.0±0.5 | 3.3±0.3 | 3.7±0.6 | 4.0±0.5 |
| y-axisb (cm) | 3.7±0.4 | 3.0±0.6c | 3.8±0.7c | 3.5±0.4 |
| x/y quotientd | 1.09±0.14 | 1.14±0.23 | 0.98±0.18 | 1.17±0.16 |
| z-axise (cm) | 3.8±0.5 | 3.2±0.4 | 3.9±0.5 | 3.9±0.6 |
| Volume (cm3) | 28.5±6.5 | 17.1±4.9f | 29.7±11.7f | 28.8±7.0 |
| Ablation timeg (min) | 12.0±0.0 | 9.36±0.63 | 4.60±0.50 | 20.85±0.86 |
| Temperatureg (°C) | 72.5±14.9 | 60.8±10.9 | 61.6±22.0 | 54.2±15.0 |
| P h | < 0.001 | 0.135 | 0.007 | 0.001 |
| Deviationi (%) | 101 | 21 | 110 | 103 |
Overall P values for ANOVA are significant (P ≤ 0.043): i.e., x-, y-, and z-axis, and volume.
Diameter in the longitudinal axis along the electrode track.
Diameter in the perpendicular axis in the plane created by cutting along the electrode track.
P = 0.04 for AngioDynamics vs. Boston Scientific.
Degree of sphericity: the more spherical, the more the ratio approaches 1.
Diameter in the axis orthogonal to the x-y plane, at the midpoint of the x-axis on both sides, summated.
P = 0.03 for AngioDynamics vs. Boston Scientific.
Values for ablation time and temperature have descriptive character and were not used for ANOVA.
Double t test for paired samples: a value P < 0.05 implies a significant difference between the actual and the mathematically calculated volume.
Percent deviation of the actual volume from the mathematically calculated volume (14.14 cm3).
Data are presented as mean±standard deviation for the 3 cm RF-induced coagulation necrosis.