Table 3 The median [interquartile range (Q1, Q3)] pain scores at 45, 60, 120 and 240 minutes after the end of the procedure (EP-t) 14 calves receiving ultrasound-guided rectus sheath block (RSB) or sham injection (CG) at different time intervals. A statistically significant difference was found in all the times considered (P < Â 0.05)