Emergency Department Rapid Intravenous Rehydration (RIVR) for Pediatric Gastroenteritis

Inclusion Criteria: * Acute gastroenteritis as determined by the supervising physician. * Age greater than 90 days * Dehydrated and unable to consume sufficient oral fluids to overcome their dehydration state Exclusion Criteria: * Weight less than 5 kg or greater than 33 kg * Underlying disease which may limit the amount of IV fluids given,including but not limited to: hypoalbuminemic states, renal insufficiency, heart disease requiring pharmacotherapy or lesions that may predispose to congestive heart failure, hypertension, chronic lung disease (excluding asthma), diabetes mellitus, severe anemia, and chronic inflammatory disease * Clinical suspicion by the attending physician of myocarditis or previously undiagnosed cardiac or renal disease. * History of abdominal surgery or concern regarding an acute surgical abdomen * Significant head, chest or abdominal trauma within the preceding 7 days * Bilious or bloody vomitus * Evidence of hemodynamic compromise (BP \< 80 + 2 \* age (yrs)) requiring \> 20 mL/kg 0.9% normal saline to be administered in the 1st hour * Bedside glucose \< 2.8 mmol/L (see Section 8.3) * Unable to provide a telephone number or unavailable for follow-up * Previously enrolled in this trial