[Sodium balance in premature infants]

Area of Science:

• Neonatalogy
• Pediatric Nephrology
• Pediatric Nutrition

Context:

• Water and electrolyte metabolism is crucial for treating low birth weight infants.
• Preterm infants often experience negative sodium balance due to high renal losses and inadequate intake.
• Individualized sodium management is essential, considering gestational age, illness severity, and renal function.

Purpose:

• To investigate the relationship between sodium balance and body weight gain in preterm infants.
• To compare outcomes in preterm infants on different feeding regimens (mother's milk with supplements, mother's milk with amino acids, and total parenteral nutrition) during the first 10 days of life.

Summary:

• A prospective study of 21 preterm infants (28-36 weeks gestation) revealed that infants on total parenteral nutrition (TPN) achieved a statistically significant 3% weight gain compared to birth weight.
• While all groups had adequate fluid intake, TPN group had higher sodium intake and a positive sodium balance by day five, unlike some infants in the other groups.
• No significant differences were observed in serum/urine osmolality or other biochemical markers among the groups.

Impact:

• Total parenteral nutrition may promote better weight gain and sodium retention in preterm infants compared to other feeding methods.
• Findings underscore the need for careful monitoring and adjustment of sodium balance in preterm infants to support growth.
• This research contributes to optimizing nutritional strategies for extremely premature infants.