CLEB(n=24)

CLPB(n=22)

CLPBS(n=23)

Morphine  12 h
Morphine 48 h

1.6±2.6
7.4±6.9

3.0±2.7
9.7±7.0

1.5±2.0
7.8±6.9

Table 4: postoperative morphine consumption (boluses number) listed as mean ± SD or number of patients per category.