“…In Group S, the time of first analgesia request was 10.40 ± 2.41 h. Previous studies using SCPB in parotid surgery did not declare the duration to the first analgesia request [ [1] , [2] , [3] ]. However, Yaho et al [ 27 ] showed that the first analgesic request following SCPB was 18 h in thyroid surgery , as they used higher concentration of LA 10 ml ropivacaine 0.5% [ 27 ].…”