title: [Gastric emptying of different liquid test meals measured by ultrasonography].
abstract: The rate of gastric emptying of different liquid solutions was measured in 80 voluntary normal young male subjects (mean age 19.9 +/- 1.6 years) by direct real-time ultrasonic imaging. Multiple US scans were repeated at regular intervals (15-30 minutes) until complete gastric emptying was established, after ingestion of 500 cc of 8 different liquid test meals: isotonic saline, 50% glucose, 5% glucose, 40 g of proteins, 20 g of protein, 40 g of fat, 20 g of fat and mixed (carbohydrates, proteins and fat). Eight groups of ten subjects were studied, each one with a different test meal. Three types of gastric emptying were identified: slow (177 +/- 12 minutes) in subjects receiving 50% glucose, 40 and 20 grs of proteins and mixed test meals; intermediate (83 +/- 9 minutes) with 5% glucose, 40 and 20 g of fat; rapid (40 +/- 6 minutes) with isotonic saline. The mixed diet had the slowest emptying time (210 +/- 6 min). Our results are in accordance with published data regarding gastric motor physiology and demonstrates the usefulness of ultrasound in the study of gastric emptying of fluids.
authors: Departamento de Gastroenterología, Hospital Militar Dr. Carlos Arvelo, Caracas.
authors: M A
authors: MA
authors: Nieves
authors: C
authors: C
authors: Gaona
authors: M
authors: M
authors: Alvarado
authors: J
authors: J
authors: Flores
authors: M
authors: M
authors: Garassini
mesh_terms: D000293:Adolescent; D000328:Adult; D004041:Dietary Fats / Q000008:administration & dosage; D004044:Dietary Proteins / Q000008:administration & dosage; D005526:Food, Formulated; D005746:Gastric Emptying / Q000502:physiology*; D005772:Gastrointestinal Transit / Q000502:physiology*; D005950:Glucose Solution, Hypertonic / Q000008:administration & dosage; D006801:Humans; D008297:Male; D011706:Pyloric Antrum / Q000000981:diagnostic imaging / Q000502:physiology; D012462:Saline Solution, Hypertonic / Q000008:administration & dosage; D014463:Ultrasonography
chemical_list: D004041:Dietary Fats; D004044:Dietary Proteins; D005950:Glucose Solution, Hypertonic; D012462:Saline Solution, Hypertonic
vernacular_title: Estudio del vaciamiento gástrico de diferentes líquidos mediante ultrasonografía.