Table 3.
Performance parameters of the four RFA systems for 5 cm target ablation volume
| Cool-Tip | 1500X RF | RF 3000 | CelonPower LAB | |
|---|---|---|---|---|
| Manufacturer | Radionics | AngioDynamics | Boston Scientific | Celon |
| x-axisa (cm) | 4.4±0.5b | 4.5±0.6b | 4.1±0.5b | 5.4±0.5b |
| y-axisc (cm) | 4.6±0.4d | 4.2±1.0d | 5.9±1.0d | 5.3±0.7 |
| Mean x/y quotiente | 0.96±0.13 | 1.11±0.24 | 0.73±0.23 | 1.02±0.14 |
| z-axisf (cm) | 4.6±0.5g,h | 3.9±0.5g,h | 5.8±0.5h | 6.1±1.1g |
| Volume (cm3) | 48.3±9.9i | 39.4±16.2i,j | 71.8±14.5j | 93.9±28.1i |
| Ablation timek (min) | 12.0±0.0 | 19.59±1.13 | 9.15±2.93 | 40.21±1.78 |
| Temperaturek (°C) | 60.0±23.2 | 57.6±23.0 | 84.5±7.7 | 79.6±18.6 |
| P l | 0.002 | 0.003 | 0.25 | 0.024 |
| Deviationm (%) | 26 | 40 | 10 | 43 |
Overall P values for ANOVA are significant (P ≤ 0.004): i.e., x-, y-, z-axis, x/y quotient, and volume.
Diameter in the longitudinal axis along the electrode track.
P = 0.01 for Radionics vs. Celon; P = 0.001 for AngioDynamics vs. Celon; P < 0.001 for Boston Scientific vs. Celon.
Diameter in the perpendicular axis in the plane created by cutting along the electrode track.
P = 0.03 for Radionics vs. Boston Scientific; P = 0.003 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 = 0.002 for Radionics vs. Celon; P < 0.001 for AngioDynamics vs. Celon.
P = 0.02 for Radionics vs. Boston Scientific; P < 0.001 for AngioDynamics vs. Boston Scientific.
P < 0.001 for Radionics vs. Celon; P < 0.001 for AngioDynamics vs. Celon.
P = 0.02 for AngioDynamics vs. Boston Scientific.
Values for ablation time and temperature measurement 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.
Percentage deviation of the actual volume from the mathematically calculated volume (65.45 cm3).
Data are presented as mean±standard deviation for the 5 cm RF-induced coagulation necrosis.