Overview THe Comparison of Target Controlled Infusion of Propofol or Etomidate at General Anesthesia in Geriatric Patients Status: Unknown status Trial end date: 2014-07-01 Target enrollment: Participant gender: Summary Compare the efficacy and safety of closed-loop target controlled infusion of propofol or etomidate at general anesthesia in geriatric patients Phase: Phase 4 Details Lead Sponsor: Second Affiliated Hospital of Xi'an Jiaotong UniversityCollaborator: Chinese Medical AssociationTreatments: AnestheticsAtracuriumCisatracuriumEtomidatePropofolRemifentanilSufentanil