Diarrhea Management with Oral Rehydration Solution

Types of ORS Based on Severity of Dehydration

The Centers for Disease Control and Prevention recommends ORS with sodium concentration of 75-90 mEq/L for initial rehydration, especially in cases with high purging rates (>10 mL/kg/hour) 1, 3
For mild dehydration (3-5% fluid deficit), administer 50 mL/kg of ORS over 2-4 hours, as recommended by the World Health Organization 4, 6
For moderate dehydration (6-9% fluid deficit), administer 100 mL/kg of ORS over 2-4 hours, according to the Centers for Disease Control and Prevention 6
For severe dehydration (≥10% fluid deficit or shock), begin with intravenous rehydration using Ringer's lactate solution or normal saline until vital signs normalize, then transition to oral therapy, as suggested by the American Academy of Pediatrics 2, 6

The World Health Organization recommends that families keep ORS at home for early intervention when diarrhea begins, with a strength of evidence classified as high 1, 8
When commercial ORS is unavailable, food-based fluids (cereals or gruels) can be used to prevent dehydration, with a moderate level of evidence supporting this recommendation 8
The American Academy of Pediatrics emphasizes that the most crucial aspect of home management is increased fluid intake and maintaining adequate caloric intake, with a high strength of evidence 1, 8

The World Health Organization recommends that breastfed infants should continue nursing on demand, with a high strength of evidence supporting this recommendation 6
For bottle-fed infants, resume full-strength formula immediately after rehydration, as recommended by the American Academy of Pediatrics with a moderate level of evidence 6, 10
Older children should continue their usual diet, focusing on starches, cereals, yogurt, fruits, and vegetables, with a moderate strength of evidence supporting this recommendation 6, 11

The Centers for Disease Control and Prevention notes that ORS is not sufficient therapy for bloody diarrhea (dysentery), which may require antimicrobial treatment, with a high strength of evidence 8, 9
Patients with intestinal ileus should not receive oral fluids until bowel sounds are audible, as recommended by the American College of Gastroenterology with a moderate level of evidence 8, 9
For glucose malabsorption (rare, ~1% of cases), watch for increased stool output with ORS administration, with a low strength of evidence supporting this recommendation 1, 9
In elderly patients, monitor for overhydration, especially with underlying heart or kidney conditions, as suggested by the American Geriatrics Society with a moderate level of evidence 2