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Intraoperative ketamine for prevention of postoperative delirium or pain after major surgery in older adults: an international, multicentre, double-blind, randomised clinical trial

Pain MedicineRandomised Clinical TrialSurgeryPost-operative CarePain ManagementAnalgesicsHealth SciencesGeriatricsPostoperative Pain ManagementPerioperative PainOutcomes ResearchPreoperative PainIntraoperative KetaminePain ResearchPatient SafetyOlder AdultsAnesthesiaMedicinePostoperative ConsiderationAnesthesiology