Effects of nefopam with fentanyl in intravenous patient-controlled analgesia after arthroscopic orthopedic surgery: a prospective double-blind randomized trial

Abstract

Background/aim: We performed this prospective randomized double-blind study to compare the effects of nefopam versus ketorolac inintravenous fentanyl-based patient-controlled analgesia (PCA) after shoulder arthroscopic orthopedic surgery.Materials and methods: Ninety-two patients were randomly divided into two groups to receive intravenous PCA. Patients were assignedto either the nefopam group (nefopam 120 mg and fentanyl 20 µg/kg) or the ketorolac group (ketorolac 2 mg/kg and fentanyl 20 µg/kg).Pain was assessed on a visual analogue scale (VAS) and a numeric rating scale (NRS). Additionally, patient satisfaction, adverse events,and vital signs were monitored.Results: There were no significant differences in VAS score (P = 0.48) or NRS score (P = 0.15) between the two groups. Similarly, patientsatisfaction did not differ between the two groups [8.5(0.8) vs. 8.2(1.0), P = 0.14]. There were no statistically significant differences in theincidence of nausea (P = 0.72), vomiting (P = 0.46), urinary retention (P = 0.82), sweating (P = 0.49), or dizziness (P = 0.45) between thetwo groups. Likewise, there were no differences in heart rate [78.2(7.7) vs. 75.2(6.5), P = 0.18] or SpO2 [98.4(1.8) vs. 98.5(1.9), P = 0.83].Conclusion: Nefopam is an appropriate alternative for co-administration with fentanyl-based PCA in patients who have difficulty usingnonsteroidal antiinflammatory drugs.