From: Comparative study of ultrasound-guided paravertebral block versus intravenous tramadol for postoperative pain control in percutaneous nephrolithotomy
Group P (n = 26)
Group T (n = 27)
P values
Nausea, n (%)
7 (26.9%)
8 (29.6%)
0.82
Vomiting, n (%)
6 (23.1%)
6 (22.2%)
0.94
Additional analgesic, n (%)
2 (7.7%)
0.04*
Lung complications, n (%)
0
0.98