Table 4. Patients’ Characteristics, Type of Operation, Intraoperative Amount of Intravenous Fentanyl, Duration of Anesthesia, and Amount of Intravenous Morphine as Rescue Drug During the First Hour after Extubation
For age, ASA class, weight, duration of anesthesia, amount of fentanyl administered intraoperatively, and amount of rescue morphine administered in the first hour postoperatively, ranges (minimum–maximum) are reported. Hip surgery: surgical dislocation of the hip, periacetabular osteotomy, total hip arthroplasty. Lumbar spine surgery: decompression and stabilization, internal fixation using Dynesys© (Sulzer Orthopedics Ltd., Baar, Switzerland). For fentanyl, the total intraoperative amount was divided by the duration of anesthesia. Combinations E and K were tested again (E-retest and K-retest) due to retesting at the end of the optimization procedure (see Methods, Optimization Procedure).