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Comparative effects of fentanyl versus sufentanil on cerebral oxygen saturation and postoperative cognitive function in elderly patients undergoing open surgery

Anaesthetic AgentElderly PatientsDementiaPostoperative Pain ManagementFentanyl Versus SufentanilNeuropharmacologyGeriatric AnesthesiaNeuroscienceNeurologyAnesthesiaMedicineAnesthetic PharmacologyCerebral Oxygen SaturationAnesthesiology