Investigators assess the gastric contents by ultrasonography in fasted patients undergoing cholecystectomy.
Investigators evaluate the gastric volume through cross sectional area and amount of clear fluid using Perlas grade by ultrasound in the supine and right lateral position of fasted patients undergoing cholecystectomy. Full stomach is regarded if solid gastric contents are detected or clear fluid is more than 1.5 ml/kg. The frequency of full stomach will be analyzed.
Study Type
OBSERVATIONAL
Enrollment
140
Ultrasound assessment of gastric content is performed in fasted patient undergoing cholecystectomy.
Seoul Metropolitan Government Seoul National University Boramae Medical Center
Seoul, South Korea
Incidence of full stomach
The incidence of full stomach is assessed by using ultrasonography.
Time frame: Before the induction of anesthesia
Cross sectional area of the stomach
The cross sectional area of the stomach is assessed by using ultrasonography in the supine and right lateral positions.
Time frame: Before the induction of anesthesia
Volume of stomach
The volume of stomach is assessed using the following formula; volume of stomach (mL) = 27.0 + 14.6 x cross-sectional area (right lateral position) - 1.28 x age.
Time frame: Before the induction of anesthesia
Type of gastric contents
The type of gastric contents is assessed using ultrasonography.
Time frame: Before the induction of anesthesia
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