None
Conditions
Interventions
Observation group:Not Applicable
Sponsors
The First Affiliated Hospital of Harbin Medical University
Eligibility
Sex/Gender
All
Age
65 Years to No maximum
Inclusion criteria
Inclusion criteria: 1.Aged >= 65 years, with stratification for those aged >= 75 years 2.Patients undergoing elective surgery under general anesthesia, with an expected surgical duration of >= 2 hours 3.No preoperative use of sedatives/antipsychotics 4.No diseases that affect electroencephalographic (EEG) monitoring, such as epilepsy, severe brain injury, increased intracranial pressure, or mental illnesses 5.No history of allergies to anesthetic drugs 6.Written informed consent signed by the patient themselves or their legal guardian
Exclusion criteria
Exclusion criteria: 1.Use of sedatives/antipsychotics before anesthesia induction 2.Presence of diseases that affect electroencephalographic (EEG) monitoring, such as epilepsy, severe brain injury, increased intracranial pressure, or mental illnesses 3.Allergy to anesthetic drugs or change of anesthesia method after entering the operating room 4.Surgical area or disinfection range covering the monitoring area of EEG electrodes 5.Pregnant or lactating women 6.Patients who are unable to understand or cooperate with the study process 7.Patients who are lost to follow-up or voluntarily withdraw from the study during the clinical trial
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Composite Index = BIS_L × DB_R;Aldrete Score; | — |
Secondary
| Measure | Time frame |
|---|---|
| Minimum value of BIS (BIS_L);Peak value of delta/beta ratio (DB_R); | — |
Countries
China
Contacts
Public ContactKun Wang
The First Affiliated Hospital of Harbin Medical University
Outcome results
None listed