Current parenteral nutrition practice and clinical outcomes of term and late preterm infants: A retrospective study

Background and aims: Limited studies have described parenteral nutrition (PN) practices and clinical outcomes in term and late preterm infants. The aim of this study was to describe the current practice of PN in term and late preterm infants and their short-term clinical outcomes. Methods: We conducted a retrospective study in a tertiary NICU between October 2018 and September 2019. Infants (gestation ≥34 weeks) admitted on the day of birth or the following day and received PN were included. We collected data on patient characteristics, daily nutrition, clinical and biochemical outcomes until discharge. Results: A total of 124 infants [mean (SD) gestation: 38 (1.92) weeks] were included; 115 (93%) and 77 (77%) commenced on parenteral amino acids and lipids, respectively, by day 2 of admission. The mean parenteral amino acid and lipid intake on day 1 of admission was 1.0 (0.7) g/kg/day and 0.8 (0.6) g/kg/day respectively and increased to 1.5 (1.0) g/kg/day and 2.1 (0.7) g/kg/day by day 5, respectively. Eight (6.5%) infants accounted for 9 episodes of hospital-acquired infections. The mean z-scores for anthropometrics at discharge were significantly lower than at birth (Weight: −0.72 (1.13) vs - 0.04 (1.11); p < 0.001; Head circumference: −0.14 (1.17) vs 0.34 (1.05); p < 0.001; Length: −0.17 (1.69) vs 0.22 (1.34); p < 0.001). A total of 28 (22.6%) and 16 (12.9%) infants had mild and moderate postnatal growth restriction (PNGR), respectively. None had severe PNGR. Thirteen infants (11%) experienced hypoglycaemia, whereas 53 (43%) experienced hyperglycaemia. Conclusion: The intakes of parenteral amino acids and lipids in term and late preterm infants were at the lower end of the currently recommended doses, especially in the first five days of admission. One third of the study population had mild to moderate PNGR. Randomised trials investigating the impact of initial PN intakes on clinical, growth and developmental outcomes are recommended.