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Table 1 Comparison of clinical backgrounds, ablation time, and RFA-treated "area" size among the single-step, multi-step, and cool-tip methods in clinical HCC cases.

From: Comparison of tissue pressure and ablation time between the LeVeen and cool-tip needle methods

  LeVeen needle Cool-tip needle
  Single-step Multi-step  
Number 13 14 13
Sex (male/female) 9/4 10/4 8/5
Age 55.8 ± 2.7 56.7 ± 2.5 54.1 ± 3.3
Child A/Child B 10/3 11/3 9/4
Tumor location (r/l lobe) 11/2 10/4 10/3
Tumor size (mm) 22.0 ± 2.3 21.5 ± 1.9 20.8 ± 3.1
Ablation time (min) 22.1 ± 1.9 10.9 ± 2.5 b, c 15.4 ± 1.1 b
Ablated "area" (mm) 32.1 ± 2.6 34.2 ± 2.7 35.8 ± 3.7
Scattered recurrence a 1 0 2
  1. Tumor size and ablated area by RFA are expressed as the diameter (mm). χ2-test, ANOVA, and Scheffe's test showed no significant background difference among the single-step, multi-step, and cool-tip methods. aNumber of the patients in whom scattered intrahepatic recurrence occurred after radio frequency ablation (RFA). bp < 0.001 vs. single-step; cp < 0.01 vs. cool-tip.
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