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Oral rehydration therapy in malnourished infants with infectious diarrhoea
Insights
Oral rehydration therapy (ORT) is safe for malnourished infants with diarrhea. However, careful monitoring of fluid intake is crucial due to their high risk of fluid and salt retention.
Area of Science:
- Pediatrics
- Gastroenterology
- Nutrition
Background:
- Malnourished infants with acute infectious diarrhea present unique challenges in fluid and electrolyte management.
- Understanding water and salt homeostasis during rehydration is critical for this vulnerable population.
Purpose of the Study:
- To evaluate the clinical response and changes in water and salt balance during oral rehydration therapy (ORT) in malnourished infants.
- To assess the safety and efficacy of a specific oral rehydration solution (ORS60) in this group.
Main Methods:
- A study involving 14 malnourished Turkish infants (3-15 months) with acute infectious diarrhea.
- Treatment administered for 36 hours using an oral rehydration solution containing 60 mmol sodium/l (ORS60).
- Clinical response, fluid balance, urine output, urinary sodium excretion, and serum sodium levels were monitored.
Main Results:
- All infants were successfully rehydrated, with efficient sodium absorption and rapid restoration of water balance.
- Approximately 50% of infants developed edema due to excess fluid retention.
- Urine volume and sodium excretion were significantly lower than in well-nourished infants, indicating impaired renal regulation.
- Serum sodium levels remained within the normal range throughout the treatment.
Conclusions:
- Malnourished infants exhibit significantly greater fluid and sodium retention compared to well-nourished infants during ORT.
- Impaired renal function in managing sodium and fluid homeostasis appears to be the underlying cause.
- While ORT is effective, close monitoring of fluid volume is essential to prevent hypervolemia and potential circulatory failure in malnourished infants.
Abstract:
The clinical response and changes in water and salt homeostasis was studied for 36 hours during oral rehydration therapy with a rehydration solution containing 60 mmol sodium/l (ORS60) in 14 malnourished 3- to 15-month-old Turkish infants with acute infectious diarrhoea. All patients were successfully rehydrated with this treatment. Sodium was efficiently absorbed from the gut and water balance was rapidly restored. Because of excess fluid retention following the initial rehydration period about 50% of the patients became oedematous. Urine volume and urinary sodium excretion were found to be much lower than in well-nourished patients of the same age with acute diarrhoea who were treated in the same way. In all of the malnourished infants the serum sodium level remained within the normal range during treatment. The results show that malnourished infants retain much more fluid and sodium than infants who are in a normal nutritional state. Excessive retention of water and salt seem to be due to an inability of the kidneys to control sodium and fluid homeostasis while orally administered sodium and fluid are being absorbed from the gut. The results show that ORT is safe and efficient in the treatment of malnourished infants with acute diarrhoea. But since these infants run a high risk of developing a severe retention of fluid and salt, and consequently may develop circulatory failure due to hypervolaemia during oral rehydration therapy, it is important to carefully monitor the volume of fluid that is given.