Conditions: Older Patients; Postoperative Care; Intensive Care Unit; Dexmedetomidine; Esketamine; Delirium
Interventions: Drug: Dexmedetomidine; Drug: Dexmedetomidine-esketamine combination
Sponsors: Peking University First Hospital
Not yet recruiting Conditions: Older Patients; Postoperative Care; Intensive Care Unit; Dexmedetomidine; Esketamine; Delirium
Interventions: Drug: Dexmedetomidine; Drug: Dexmedetomidine-esketamine combination
Sponsors: Peking University First Hospital
Not yet recruiting