Adequate preoperative fasting is critical in preventing pulmonary aspiration of gastric content. Ultrasonography is considering as a useful test assessing the volume of gastric contents, but the emptying time of a rice-based meal (Asian foods) in healthy populations was not clear. The objective of this study was to investigate the minimum fasting time required for adequate gastric emptying after the ingestion of a rice-based meal.
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ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 2 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 3 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 4 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 5 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 6 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 7 hours after the ingestion of a sold meal
ultrasonographic measurement of gastric antral cross-sectional area (CSA)
Timeframe: 8 hours after the ingestion of a sold meal