elective non-cardiovascular surgery
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: ? Age 18-60 years old. ? BMI18-24 kg/m2. ?ASA?-? level. ? General anesthesia with endotracheal intubation.
Exclusion criteria
Exclusion criteria: ? Emergency surgery or cardiovascular surgery. ? Difficult airway management or difficult intubation (Mallampati scores ? or ?). ? Individuals with coronary heart disease or severe valvular heart disease. ? Individuals with cardiac conduction abnormalities or segmental myocardial systolic dysfunction. ? Severe cardiac dysfunction (preoperative LVEF<50% or NYHA functional class IV), severe liver dysfunction (Child-Pugh C grade) or severe renal failure (receiving dialysis treatment preoperatively). ? Allergic or contraindicated to benzodiazepines and other experimental drugs. ? Individuals with history of prolonged intake of psychoactive drugs or cognitive dysfunction. ? Pregnant or nursing women. ? Individuals with inability to cooperate during the examination or refusing to the examination or sign informed consent forms before the induction of anesthesia. ? No interpretation due to poor ultrasound image quality.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Left ventricular outflow tract velocity time integral( LVOT-VTI); | — |
Secondary
| Measure | Time frame |
|---|---|
| Left ventricular end-diastolic area (LVEDA);Wall thickening rate (WTR); Fractional area change (FAC);Stroke volume variation (SVV);Inferior vena cava collapsibility index (IVCCI); | — |
Countries
China
Contacts
Department of Anesthesiology, the Second Hospital, Cheeloo College of Medicine, Shandong University