Duration of antibiotic therapy reduced from 2 (1; 5) days to 1 (1; 1) day for prophylactic antibiotics (p < 0.05) and from 5 (3; 7) days to 3 (0; 5) days for therapeutic antibiotics (p < 0.05). Length of hospital stayed after surgery reduced from 7 (5; 9) days to 6 (4; 8) days (p < 0.05).