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Table 1 Effect of perfusion distance on coagulation volume, diameter and shape

From: RF tumor ablation with internally cooled electrodes and saline infusion: what is the optimal location of the saline infusion?

Perfusion distance (mm) 0 (n = 4) 2 (n = 5) 4 (n = 6) P*
Volume size (cm 3 ) 53.0 ± 15.0 91.7 ± 18.2 63.9 ± 11.7 <0.05
Axial diameter (cm) 6.2 ± 1.0 6.0 ± 0.2 5.2 ± 0.5 NS
Minimum transverse diameter (cm) 4.0 ± 0.4 5.3 ± 0.5 4.5 ± 0.8 <0.05
Maximum transverse diameter (cm) 4.0 ± 0.4 5.5 ± 0.5 5.2 ± 0.5 <0.05
Sphericity † 1.5 ± 0.2 1.1 ± 0.1 1.1 ± 0.2 <0.01
  1. The perfusion distance was defined as the shortest distance between the saline outlet and the surface of the internally cooled electrode
  2. * Overall statistical significance. Statistically significant (P < 0.05). NS: no significant differences
  3. † Fraction of the largest and the average of the two remaining diameters of the thermal lesion (see text)