Correction of Severe Dehydration in Children

Initial Assessment and Recognition

The American Academy of Pediatrics and the Infectious Diseases Society of America recommend immediate intravenous resuscitation with isotonic crystalloid boluses of 20 mL/kg for children with severe dehydration (≥10% fluid deficit) until pulse, perfusion, and mental status normalize, followed by transition to oral rehydration solution once the child can tolerate oral intake 1, 2
Severe dehydration constitutes a medical emergency requiring immediate intervention, with clinical signs including altered mental status or decreased level of consciousness, abnormal pulse and poor perfusion, shock or near-shock state, and estimated fluid deficit ≥10% of body weight 1, 2, 3
The Centers for Disease Control and Prevention recommend heightened clinical suspicion for signs of dehydration in hypernatremic children, as these signs may be masked 1

The Infectious Diseases Society of America strongly recommends administering intravenous isotonic crystalloid boluses of 20 mL/kg body weight using lactated Ringer's solution or normal saline, continuing until pulse, perfusion, and mental status return to normal 1, 2, 3
The World Health Organization suggests that malnourished infants benefit from smaller-volume, frequent boluses of 10 mL/kg body weight due to reduced cardiac capacity to handle larger volume resuscitation 1

The American Academy of Pediatrics and the Infectious Diseases Society of America recommend transitioning to oral rehydration solution (ORS) to replace the remaining estimated deficit once the patient's level of consciousness returns to normal and they can tolerate oral intake 1, 2, 3
The World Health Organization recommends continuing IV rehydration until pulse, perfusion, and mental status normalize, the patient awakens and has no altered consciousness, no risk factors for aspiration are present, and no evidence of ileus is found 1, 2

The Centers for Disease Control and Prevention recommend replacing ongoing stool and vomit losses with ORS throughout treatment until diarrhea and vomiting resolve, administering approximately 10 mL/kg for each watery stool and 2 mL/kg for each vomiting episode 1, 2, 3
The American Academy of Pediatrics suggests that breastfed infants should continue nursing throughout the illness, and normal diet should be resumed once rehydration is complete 1, 3

The Infectious Diseases Society of America recommends avoiding the use of apple juice, Gatorade, or commercial soft drinks for rehydration, as these lack appropriate electrolyte composition and may worsen dehydration 1, 2
The World Health Organization advises against delaying IV access attempts, as severe dehydration is a medical emergency requiring immediate vascular access, using alternate sites if needed 3