Studied variables
NRS, shoulder pain, pain
SECONDARY
Duration of analgesia was defined as the time interval between the completion of IBPB and the time when the patient complained of shoulder pain, and was noted every 30 min since the completion of the IBPB for 4 h.The VAS (0–10) pain score (VAS; where 0 = no pain and 10 = worst imaginable pain) was assessed at 2, 4, 6, 8, 10, 12, and 24 h after surgery.Frequency of PCA pressed was recorded at T0–4, T4–8, T8–12, T12–16, T16–20, and T20–24 h postoperatively. The first time PCA was pressed and the total 24h sufentanil consumption were also recorded.Patient satisfaction with analgesia quality 24 h post-surgery (number rating scale, NRS 1–5; 1, very dissatisfied; 2, dissatisfied; 3, slightly dissatisfied; 4, quite satisfied; 5, completely satisfied) was recorded.The primary outcome measure in this study was the duration of analgesia. The secondary outcome measures included VAS pain score, frequency of PCA pressed, first time of PCA pressed, total 24h sufentanil consumption, and patient satisfaction with analgesia quality.