None listed
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Aged 18-50; 2. ASA?-? level; 3. BMI 18.5-28kg/m^2; 4. Join the study voluntarily and sign the informed consent.
Exclusion criteria
Exclusion criteria: 1. Previous history of gastrointestinal surgery; 2. Patients with high risk of reflux aspiration (pyloric or digestive tract obstruction, reflux esophagitis and other stomach diseases); 3. Abnormal gastric motility, recently taking drugs that affect gastric motility; 4. History of diabetes; 5. Recent history of serious diseases and operations; 6. Patients with neurological diseases and inability to cooperate.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Ultrasound of the transverse area of the antrum;Gastroscopic amount of gastric juice; | — |
Secondary
| Measure | Time frame |
|---|---|
| Gastric juice PH;Blood oxygen saturation;Blood pressure; | — |
Countries
China