IV NaCl (Sodium Chloride) 0.9% Vs (Versus) IV NaCl 0.9% + 5% Dextrose in Pediatric ER for Dehydration

Dehydration and refusal to eat and drink are common complaints in the Pediatric ED (Emergency Department). Most of these children have had an unsuccessful trial of oral rehydration in their community service, therefore are treated with IV rehydration. There is no consensus as to which IV solution is the best one for rehydration. Children who are unwilling or unable to eat and drink produce Keto bodies. Theoretically, addition of glucose to the IV solution would prevent catabolic metabolism and reduce the keto bodies blood concentration which should lead to a faster objective and subjective improvement of the child's condition. The proposed study is a double blind randomized clinical trial. Children will receive either NaCl 0.9% or NaCl 0.9% + 5% glucose randomly in numbered bags. The type of solution will be known to the pharmacy only. Study aims: * Primary aim: to compare the number of hospitalizations among dehydrated pediatric patients treated with either one of the IV fluids mentioned above. * Secondary aim: To evaluate for the possibility of hypoglycemia secondary to hyperinsulinism as a response to a rapid administration of glucose. Study population: The study will include 700 children 6 month to 18 years of age. It will be conducted over 18 months in the Pediatric ED of Carmel Medical Center. Currently, data regarding the use of dextrose containing solutions is lacking. As dehydration is one of the most common medical problems encountered by the physician in the pediatric ED, it is of outmost importance to evaluate the optimal IV solution used in this setting.