Table 2 Comparison of treatment parameters and morphine usage between groups

Ablation duration, mean ± SD

5.33 ± 0.62

5.41 ± 1.04

0.751

Ablation probes

< 0.001

 50 W

50 (100.00)

28 (56.00)

 60 W

0 (0.00)

21 (42.00)

 70 W

0 (0.00)

1 (2.00)

Dose level of morphine in the first administration, experimental group,

(mg), mean ± SD

–

6.84 ± 1.01^a

–

Number of patients needed additional morphine during surgery

24(48.00)

3 (6.67)

< 0.001

Total amount of morphine used (mg)

17.40 ± 2.52

7.18 ± 1.65^a

< 0.001

Number of patients with surgery terminated

3 (6.00)

0 (0.00)

0.242