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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.