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Oral rehydration therapy: studies on potassium balance
L Marin1, R Zetterström, S Sökücü
1Department of Pediatrics, Karolinska Institute, St. Göran's Children's Hospital, Stockholm, Sweden.
Insights
Oral rehydration therapy (ORT) with a solution containing 20 mmol potassium per litre effectively rehydrated infants. This potassium concentration is sufficient, and higher levels are not recommended for ORT.
Area of Science:
- Pediatrics
- Clinical Nutrition
- Gastroenterology
Background:
- Oral rehydration therapy (ORT) is crucial for managing dehydration in infants.
- Assessing electrolyte balance, particularly potassium, during ORT is vital for patient outcomes.
Purpose of the Study:
- To evaluate the clinical response and potassium balance in infants receiving ORT with a 20 mmol/L potassium solution.
- To determine if increased potassium concentration in ORT is necessary for infants of varying ages and nutritional statuses.
Main Methods:
- A study involving well-nourished and malnourished infants (3-15 months) and neonates (<2 months) undergoing ORT.
- Monitoring clinical response and measuring potassium intake, output (stool and urine), and retention throughout the rehydration period.
Main Results:
- All infants achieved successful oral rehydration.
- Potassium intake significantly exceeded output across all infant groups.
- Potassium retention increased similarly in all groups during ORT.
Conclusions:
- An oral rehydration solution (ORS) with 20 mmol potassium/L adequately meets the potassium needs of infants.
- Increasing potassium concentration in ORT is not recommended based on these findings.
Abstract:
The clinical response and changes in potassium balance were studied during oral rehydration therapy (ORT) with a solution containing 20 mmol potassium per litre in well-nourished and malnourished infants of 3 to 15 months of age as well as in neonates and young infants less than 2 months old (range 5-60 days). All infants were successfully rehydrated orally. The potassium intake considerably exceeded the potassium output in all groups during the entire rehydration period. The stool and urine potassium output were about the same in the 3 groups of patients. The retention of potassium increased during ORT in all groups at about the same rate. The study thus demonstrates that an oral rehydration solution (ORS) containing 20 mmol potassium per litre provides enough potassium to all patients. An increase in the potassium concentration of the ORT is therefore not recommended.