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Bronchial asthma treatment algorithm In emesis the stomach empties in a retrograde manner. The pyloric sphincter is closed while the cardia and esophagus relax to allow the gastric contents to be propelled orad by a forceful, synchronous contraction of abdominal wall muscles and diaphragm. Closure of the glottis and elevation of the soft palate prevent entry of vomitus into the trachea and nasopharynx. As a rule, there is prodromal salivation or yawning. Coordination between these different...